Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

237 files changed, 35641 insertions, 0 deletions

diff --git a/arch/xtensa/Kbuild b/arch/xtensa/Kbuild
new file mode 100644
index 000000000..fd12f6174
--- /dev/null
+++ b/arch/xtensa/Kbuild
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-y += kernel/ mm/ platforms/ boot/dts/
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
new file mode 100644
index 000000000..6d3c9257a
--- /dev/null
+++ b/arch/xtensa/Kconfig
@@ -0,0 +1,798 @@
+# SPDX-License-Identifier: GPL-2.0
+config XTENSA
+	def_bool y
+	select ARCH_32BIT_OFF_T
+	select ARCH_HAS_BINFMT_FLAT if !MMU
+	select ARCH_HAS_CURRENT_STACK_POINTER
+	select ARCH_HAS_DEBUG_VM_PGTABLE
+	select ARCH_HAS_DMA_PREP_COHERENT if MMU
+	select ARCH_HAS_GCOV_PROFILE_ALL
+	select ARCH_HAS_KCOV
+	select ARCH_HAS_SYNC_DMA_FOR_CPU if MMU
+	select ARCH_HAS_SYNC_DMA_FOR_DEVICE if MMU
+	select ARCH_HAS_DMA_SET_UNCACHED if MMU
+	select ARCH_HAS_STRNCPY_FROM_USER if !KASAN
+	select ARCH_HAS_STRNLEN_USER
+	select ARCH_USE_MEMTEST
+	select ARCH_USE_QUEUED_RWLOCKS
+	select ARCH_USE_QUEUED_SPINLOCKS
+	select ARCH_WANT_FRAME_POINTERS
+	select ARCH_WANT_IPC_PARSE_VERSION
+	select BUILDTIME_TABLE_SORT
+	select CLONE_BACKWARDS
+	select COMMON_CLK
+	select DMA_NONCOHERENT_MMAP if MMU
+	select GENERIC_ATOMIC64
+	select GENERIC_IRQ_SHOW
+	select GENERIC_LIB_CMPDI2
+	select GENERIC_LIB_MULDI3
+	select GENERIC_LIB_UCMPDI2
+	select GENERIC_PCI_IOMAP
+	select GENERIC_SCHED_CLOCK
+	select HAVE_ARCH_AUDITSYSCALL
+	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
+	select HAVE_ARCH_KASAN if MMU && !XIP_KERNEL
+	select HAVE_ARCH_KCSAN
+	select HAVE_ARCH_SECCOMP_FILTER
+	select HAVE_ARCH_TRACEHOOK
+	select HAVE_CONTEXT_TRACKING_USER
+	select HAVE_DEBUG_KMEMLEAK
+	select HAVE_DMA_CONTIGUOUS
+	select HAVE_EXIT_THREAD
+	select HAVE_FUNCTION_TRACER
+	select HAVE_GCC_PLUGINS if GCC_VERSION >= 120000
+	select HAVE_HW_BREAKPOINT if PERF_EVENTS
+	select HAVE_IRQ_TIME_ACCOUNTING
+	select HAVE_PCI
+	select HAVE_PERF_EVENTS
+	select HAVE_STACKPROTECTOR
+	select HAVE_SYSCALL_TRACEPOINTS
+	select HAVE_VIRT_CPU_ACCOUNTING_GEN
+	select IRQ_DOMAIN
+	select LOCK_MM_AND_FIND_VMA
+	select MODULES_USE_ELF_RELA
+	select PERF_USE_VMALLOC
+	select TRACE_IRQFLAGS_SUPPORT
+	help
+	  Xtensa processors are 32-bit RISC machines designed by Tensilica
+	  primarily for embedded systems.  These processors are both
+	  configurable and extensible.  The Linux port to the Xtensa
+	  architecture supports all processor configurations and extensions,
+	  with reasonable minimum requirements.  The Xtensa Linux project has
+	  a home page at <http://www.linux-xtensa.org/>.
+
+config GENERIC_HWEIGHT
+	def_bool y
+
+config ARCH_HAS_ILOG2_U32
+	def_bool n
+
+config ARCH_HAS_ILOG2_U64
+	def_bool n
+
+config NO_IOPORT_MAP
+	def_bool n
+
+config HZ
+	int
+	default 100
+
+config LOCKDEP_SUPPORT
+	def_bool y
+
+config STACKTRACE_SUPPORT
+	def_bool y
+
+config MMU
+	def_bool n
+	select PFAULT
+
+config HAVE_XTENSA_GPIO32
+	def_bool n
+
+config KASAN_SHADOW_OFFSET
+	hex
+	default 0x6e400000
+
+config CPU_BIG_ENDIAN
+	def_bool $(success,test "$(shell,echo __XTENSA_EB__ | $(CC) -E -P -)" = 1)
+
+config CPU_LITTLE_ENDIAN
+	def_bool !CPU_BIG_ENDIAN
+
+config CC_HAVE_CALL0_ABI
+	def_bool $(success,test "$(shell,echo __XTENSA_CALL0_ABI__ | $(CC) -mabi=call0 -E -P - 2>/dev/null)" = 1)
+
+menu "Processor type and features"
+
+choice
+	prompt "Xtensa Processor Configuration"
+	default XTENSA_VARIANT_FSF
+
+config XTENSA_VARIANT_FSF
+	bool "fsf - default (not generic) configuration"
+	select MMU
+
+config XTENSA_VARIANT_DC232B
+	bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
+	select MMU
+	select HAVE_XTENSA_GPIO32
+	help
+	  This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
+
+config XTENSA_VARIANT_DC233C
+	bool "dc233c - Diamond 233L Standard Core Rev.C (LE)"
+	select MMU
+	select HAVE_XTENSA_GPIO32
+	help
+	  This variant refers to Tensilica's Diamond 233L Standard core Rev.C (LE).
+
+config XTENSA_VARIANT_CUSTOM
+	bool "Custom Xtensa processor configuration"
+	select HAVE_XTENSA_GPIO32
+	help
+	  Select this variant to use a custom Xtensa processor configuration.
+	  You will be prompted for a processor variant CORENAME.
+endchoice
+
+config XTENSA_VARIANT_CUSTOM_NAME
+	string "Xtensa Processor Custom Core Variant Name"
+	depends on XTENSA_VARIANT_CUSTOM
+	help
+	  Provide the name of a custom Xtensa processor variant.
+	  This CORENAME selects arch/xtensa/variant/CORENAME.
+	  Don't forget you have to select MMU if you have one.
+
+config XTENSA_VARIANT_NAME
+	string
+	default "dc232b"			if XTENSA_VARIANT_DC232B
+	default "dc233c"			if XTENSA_VARIANT_DC233C
+	default "fsf"				if XTENSA_VARIANT_FSF
+	default XTENSA_VARIANT_CUSTOM_NAME	if XTENSA_VARIANT_CUSTOM
+
+config XTENSA_VARIANT_MMU
+	bool "Core variant has a Full MMU (TLB, Pages, Protection, etc)"
+	depends on XTENSA_VARIANT_CUSTOM
+	default y
+	select MMU
+	help
+	  Build a Conventional Kernel with full MMU support,
+	  ie: it supports a TLB with auto-loading, page protection.
+
+config XTENSA_VARIANT_HAVE_PERF_EVENTS
+	bool "Core variant has Performance Monitor Module"
+	depends on XTENSA_VARIANT_CUSTOM
+	default n
+	help
+	  Enable if core variant has Performance Monitor Module with
+	  External Registers Interface.
+
+	  If unsure, say N.
+
+config XTENSA_FAKE_NMI
+	bool "Treat PMM IRQ as NMI"
+	depends on XTENSA_VARIANT_HAVE_PERF_EVENTS
+	default n
+	help
+	  If PMM IRQ is the only IRQ at EXCM level it is safe to
+	  treat it as NMI, which improves accuracy of profiling.
+
+	  If there are other interrupts at or above PMM IRQ priority level
+	  but not above the EXCM level, PMM IRQ still may be treated as NMI,
+	  but only if these IRQs are not used. There will be a build warning
+	  saying that this is not safe, and a bugcheck if one of these IRQs
+	  actually fire.
+
+	  If unsure, say N.
+
+config PFAULT
+	bool "Handle protection faults" if EXPERT && !MMU
+	default y
+	help
+	  Handle protection faults. MMU configurations must enable it.
+	  noMMU configurations may disable it if used memory map never
+	  generates protection faults or faults are always fatal.
+
+	  If unsure, say Y.
+
+config XTENSA_UNALIGNED_USER
+	bool "Unaligned memory access in user space"
+	help
+	  The Xtensa architecture currently does not handle unaligned
+	  memory accesses in hardware but through an exception handler.
+	  Per default, unaligned memory accesses are disabled in user space.
+
+	  Say Y here to enable unaligned memory access in user space.
+
+config HAVE_SMP
+	bool "System Supports SMP (MX)"
+	depends on XTENSA_VARIANT_CUSTOM
+	select XTENSA_MX
+	help
+	  This option is used to indicate that the system-on-a-chip (SOC)
+	  supports Multiprocessing. Multiprocessor support implemented above
+	  the CPU core definition and currently needs to be selected manually.
+
+	  Multiprocessor support is implemented with external cache and
+	  interrupt controllers.
+
+	  The MX interrupt distributer adds Interprocessor Interrupts
+	  and causes the IRQ numbers to be increased by 4 for devices
+	  like the open cores ethernet driver and the serial interface.
+
+	  You still have to select "Enable SMP" to enable SMP on this SOC.
+
+config SMP
+	bool "Enable Symmetric multi-processing support"
+	depends on HAVE_SMP
+	select GENERIC_SMP_IDLE_THREAD
+	help
+	  Enabled SMP Software; allows more than one CPU/CORE
+	  to be activated during startup.
+
+config NR_CPUS
+	depends on SMP
+	int "Maximum number of CPUs (2-32)"
+	range 2 32
+	default "4"
+
+config HOTPLUG_CPU
+	bool "Enable CPU hotplug support"
+	depends on SMP
+	help
+	  Say Y here to allow turning CPUs off and on. CPUs can be
+	  controlled through /sys/devices/system/cpu.
+
+	  Say N if you want to disable CPU hotplug.
+
+config SECONDARY_RESET_VECTOR
+	bool "Secondary cores use alternative reset vector"
+	default y
+	depends on HAVE_SMP
+	help
+	  Secondary cores may be configured to use alternative reset vector,
+	  or all cores may use primary reset vector.
+	  Say Y here to supply handler for the alternative reset location.
+
+config FAST_SYSCALL_XTENSA
+	bool "Enable fast atomic syscalls"
+	default n
+	help
+	  fast_syscall_xtensa is a syscall that can make atomic operations
+	  on UP kernel when processor has no s32c1i support.
+
+	  This syscall is deprecated. It may have issues when called with
+	  invalid arguments. It is provided only for backwards compatibility.
+	  Only enable it if your userspace software requires it.
+
+	  If unsure, say N.
+
+config FAST_SYSCALL_SPILL_REGISTERS
+	bool "Enable spill registers syscall"
+	default n
+	help
+	  fast_syscall_spill_registers is a syscall that spills all active
+	  register windows of a calling userspace task onto its stack.
+
+	  This syscall is deprecated. It may have issues when called with
+	  invalid arguments. It is provided only for backwards compatibility.
+	  Only enable it if your userspace software requires it.
+
+	  If unsure, say N.
+
+choice
+	prompt "Kernel ABI"
+	default KERNEL_ABI_DEFAULT
+	help
+	  Select ABI for the kernel code. This ABI is independent of the
+	  supported userspace ABI and any combination of the
+	  kernel/userspace ABI is possible and should work.
+
+	  In case both kernel and userspace support only call0 ABI
+	  all register windows support code will be omitted from the
+	  build.
+
+	  If unsure, choose the default ABI.
+
+config KERNEL_ABI_DEFAULT
+	bool "Default ABI"
+	help
+	  Select this option to compile kernel code with the default ABI
+	  selected for the toolchain.
+	  Normally cores with windowed registers option use windowed ABI and
+	  cores without it use call0 ABI.
+
+config KERNEL_ABI_CALL0
+	bool "Call0 ABI" if CC_HAVE_CALL0_ABI
+	help
+	  Select this option to compile kernel code with call0 ABI even with
+	  toolchain that defaults to windowed ABI.
+	  When this option is not selected the default toolchain ABI will
+	  be used for the kernel code.
+
+endchoice
+
+config USER_ABI_CALL0
+	bool
+
+choice
+	prompt "Userspace ABI"
+	default USER_ABI_DEFAULT
+	help
+	  Select supported userspace ABI.
+
+	  If unsure, choose the default ABI.
+
+config USER_ABI_DEFAULT
+	bool "Default ABI only"
+	help
+	  Assume default userspace ABI. For XEA2 cores it is windowed ABI.
+	  call0 ABI binaries may be run on such kernel, but signal delivery
+	  will not work correctly for them.
+
+config USER_ABI_CALL0_ONLY
+	bool "Call0 ABI only"
+	select USER_ABI_CALL0
+	help
+	  Select this option to support only call0 ABI in userspace.
+	  Windowed ABI binaries will crash with a segfault caused by
+	  an illegal instruction exception on the first 'entry' opcode.
+
+	  Choose this option if you're planning to run only user code
+	  built with call0 ABI.
+
+config USER_ABI_CALL0_PROBE
+	bool "Support both windowed and call0 ABI by probing"
+	select USER_ABI_CALL0
+	help
+	  Select this option to support both windowed and call0 userspace
+	  ABIs. When enabled all processes are started with PS.WOE disabled
+	  and a fast user exception handler for an illegal instruction is
+	  used to turn on PS.WOE bit on the first 'entry' opcode executed by
+	  the userspace.
+
+	  This option should be enabled for the kernel that must support
+	  both call0 and windowed ABIs in userspace at the same time.
+
+	  Note that Xtensa ISA does not guarantee that entry opcode will
+	  raise an illegal instruction exception on cores with XEA2 when
+	  PS.WOE is disabled, check whether the target core supports it.
+
+endchoice
+
+endmenu
+
+config XTENSA_CALIBRATE_CCOUNT
+	def_bool n
+	help
+	  On some platforms (XT2000, for example), the CPU clock rate can
+	  vary.  The frequency can be determined, however, by measuring
+	  against a well known, fixed frequency, such as an UART oscillator.
+
+config SERIAL_CONSOLE
+	def_bool n
+
+config PLATFORM_HAVE_XIP
+	def_bool n
+
+menu "Platform options"
+
+choice
+	prompt "Xtensa System Type"
+	default XTENSA_PLATFORM_ISS
+
+config XTENSA_PLATFORM_ISS
+	bool "ISS"
+	select XTENSA_CALIBRATE_CCOUNT
+	select SERIAL_CONSOLE
+	help
+	  ISS is an acronym for Tensilica's Instruction Set Simulator.
+
+config XTENSA_PLATFORM_XT2000
+	bool "XT2000"
+	help
+	  XT2000 is the name of Tensilica's feature-rich emulation platform.
+	  This hardware is capable of running a full Linux distribution.
+
+config XTENSA_PLATFORM_XTFPGA
+	bool "XTFPGA"
+	select ETHOC if ETHERNET
+	select PLATFORM_WANT_DEFAULT_MEM if !MMU
+	select SERIAL_CONSOLE
+	select XTENSA_CALIBRATE_CCOUNT
+	select PLATFORM_HAVE_XIP
+	help
+	  XTFPGA is the name of Tensilica board family (LX60, LX110, LX200, ML605).
+	  This hardware is capable of running a full Linux distribution.
+
+endchoice
+
+config PLATFORM_NR_IRQS
+	int
+	default 3 if XTENSA_PLATFORM_XT2000
+	default 0
+
+config XTENSA_CPU_CLOCK
+	int "CPU clock rate [MHz]"
+	depends on !XTENSA_CALIBRATE_CCOUNT
+	default 16
+
+config GENERIC_CALIBRATE_DELAY
+	bool "Auto calibration of the BogoMIPS value"
+	help
+	  The BogoMIPS value can easily be derived from the CPU frequency.
+
+config CMDLINE_BOOL
+	bool "Default bootloader kernel arguments"
+
+config CMDLINE
+	string "Initial kernel command string"
+	depends on CMDLINE_BOOL
+	default "console=ttyS0,38400 root=/dev/ram"
+	help
+	  On some architectures (EBSA110 and CATS), there is currently no way
+	  for the boot loader to pass arguments to the kernel. For these
+	  architectures, you should supply some command-line options at build
+	  time by entering them here. As a minimum, you should specify the
+	  memory size and the root device (e.g., mem=64M root=/dev/nfs).
+
+config USE_OF
+	bool "Flattened Device Tree support"
+	select OF
+	select OF_EARLY_FLATTREE
+	help
+	  Include support for flattened device tree machine descriptions.
+
+config BUILTIN_DTB_SOURCE
+	string "DTB to build into the kernel image"
+	depends on OF
+
+config PARSE_BOOTPARAM
+	bool "Parse bootparam block"
+	default y
+	help
+	  Parse parameters passed to the kernel from the bootloader. It may
+	  be disabled if the kernel is known to run without the bootloader.
+
+	  If unsure, say Y.
+
+choice
+	prompt "Semihosting interface"
+	default XTENSA_SIMCALL_ISS
+	depends on XTENSA_PLATFORM_ISS
+	help
+	  Choose semihosting interface that will be used for serial port,
+	  block device and networking.
+
+config XTENSA_SIMCALL_ISS
+	bool "simcall"
+	help
+	  Use simcall instruction. simcall is only available on simulators,
+	  it does nothing on hardware.
+
+config XTENSA_SIMCALL_GDBIO
+	bool "GDBIO"
+	help
+	  Use break instruction. It is available on real hardware when GDB
+	  is attached to it via JTAG.
+
+endchoice
+
+config BLK_DEV_SIMDISK
+	tristate "Host file-based simulated block device support"
+	default n
+	depends on XTENSA_PLATFORM_ISS && BLOCK
+	help
+	  Create block devices that map to files in the host file system.
+	  Device binding to host file may be changed at runtime via proc
+	  interface provided the device is not in use.
+
+config BLK_DEV_SIMDISK_COUNT
+	int "Number of host file-based simulated block devices"
+	range 1 10
+	depends on BLK_DEV_SIMDISK
+	default 2
+	help
+	  This is the default minimal number of created block devices.
+	  Kernel/module parameter 'simdisk_count' may be used to change this
+	  value at runtime. More file names (but no more than 10) may be
+	  specified as parameters, simdisk_count grows accordingly.
+
+config SIMDISK0_FILENAME
+	string "Host filename for the first simulated device"
+	depends on BLK_DEV_SIMDISK = y
+	default ""
+	help
+	  Attach a first simdisk to a host file. Conventionally, this file
+	  contains a root file system.
+
+config SIMDISK1_FILENAME
+	string "Host filename for the second simulated device"
+	depends on BLK_DEV_SIMDISK = y && BLK_DEV_SIMDISK_COUNT != 1
+	default ""
+	help
+	  Another simulated disk in a host file for a buildroot-independent
+	  storage.
+
+config XTFPGA_LCD
+	bool "Enable XTFPGA LCD driver"
+	depends on XTENSA_PLATFORM_XTFPGA
+	default n
+	help
+	  There's a 2x16 LCD on most of XTFPGA boards, kernel may output
+	  progress messages there during bootup/shutdown. It may be useful
+	  during board bringup.
+
+	  If unsure, say N.
+
+config XTFPGA_LCD_BASE_ADDR
+	hex "XTFPGA LCD base address"
+	depends on XTFPGA_LCD
+	default "0x0d0c0000"
+	help
+	  Base address of the LCD controller inside KIO region.
+	  Different boards from XTFPGA family have LCD controller at different
+	  addresses. Please consult prototyping user guide for your board for
+	  the correct address. Wrong address here may lead to hardware lockup.
+
+config XTFPGA_LCD_8BIT_ACCESS
+	bool "Use 8-bit access to XTFPGA LCD"
+	depends on XTFPGA_LCD
+	default n
+	help
+	  LCD may be connected with 4- or 8-bit interface, 8-bit access may
+	  only be used with 8-bit interface. Please consult prototyping user
+	  guide for your board for the correct interface width.
+
+comment "Kernel memory layout"
+
+config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
+	bool "Initialize Xtensa MMU inside the Linux kernel code"
+	depends on !XTENSA_VARIANT_FSF && !XTENSA_VARIANT_DC232B
+	default y if XTENSA_VARIANT_DC233C || XTENSA_VARIANT_CUSTOM
+	help
+	  Earlier version initialized the MMU in the exception vector
+	  before jumping to _startup in head.S and had an advantage that
+	  it was possible to place a software breakpoint at 'reset' and
+	  then enter your normal kernel breakpoints once the MMU was mapped
+	  to the kernel mappings (0XC0000000).
+
+	  This unfortunately won't work for U-Boot and likely also won't
+	  work for using KEXEC to have a hot kernel ready for doing a
+	  KDUMP.
+
+	  So now the MMU is initialized in head.S but it's necessary to
+	  use hardware breakpoints (gdb 'hbreak' cmd) to break at _startup.
+	  xt-gdb can't place a Software Breakpoint in the  0XD region prior
+	  to mapping the MMU and after mapping even if the area of low memory
+	  was mapped gdb wouldn't remove the breakpoint on hitting it as the
+	  PC wouldn't match. Since Hardware Breakpoints are recommended for
+	  Linux configurations it seems reasonable to just assume they exist
+	  and leave this older mechanism for unfortunate souls that choose
+	  not to follow Tensilica's recommendation.
+
+	  Selecting this will cause U-Boot to set the KERNEL Load and Entry
+	  address at 0x00003000 instead of the mapped std of 0xD0003000.
+
+	  If in doubt, say Y.
+
+config XIP_KERNEL
+	bool "Kernel Execute-In-Place from ROM"
+	depends on PLATFORM_HAVE_XIP
+	help
+	  Execute-In-Place allows the kernel to run from non-volatile storage
+	  directly addressable by the CPU, such as NOR flash. This saves RAM
+	  space since the text section of the kernel is not loaded from flash
+	  to RAM. Read-write sections, such as the data section and stack,
+	  are still copied to RAM. The XIP kernel is not compressed since
+	  it has to run directly from flash, so it will take more space to
+	  store it. The flash address used to link the kernel object files,
+	  and for storing it, is configuration dependent. Therefore, if you
+	  say Y here, you must know the proper physical address where to
+	  store the kernel image depending on your own flash memory usage.
+
+	  Also note that the make target becomes "make xipImage" rather than
+	  "make Image" or "make uImage". The final kernel binary to put in
+	  ROM memory will be arch/xtensa/boot/xipImage.
+
+	  If unsure, say N.
+
+config MEMMAP_CACHEATTR
+	hex "Cache attributes for the memory address space"
+	depends on !MMU
+	default 0x22222222
+	help
+	  These cache attributes are set up for noMMU systems. Each hex digit
+	  specifies cache attributes for the corresponding 512MB memory
+	  region: bits 0..3 -- for addresses 0x00000000..0x1fffffff,
+	  bits 4..7 -- for addresses 0x20000000..0x3fffffff, and so on.
+
+	  Cache attribute values are specific for the MMU type.
+	  For region protection MMUs:
+	    1: WT cached,
+	    2: cache bypass,
+	    4: WB cached,
+	    f: illegal.
+	  For full MMU:
+	    bit 0: executable,
+	    bit 1: writable,
+	    bits 2..3:
+	      0: cache bypass,
+	      1: WB cache,
+	      2: WT cache,
+	      3: special (c and e are illegal, f is reserved).
+	  For MPU:
+	    0: illegal,
+	    1: WB cache,
+	    2: WB, no-write-allocate cache,
+	    3: WT cache,
+	    4: cache bypass.
+
+config KSEG_PADDR
+	hex "Physical address of the KSEG mapping"
+	depends on INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX && MMU
+	default 0x00000000
+	help
+	  This is the physical address where KSEG is mapped. Please refer to
+	  the chosen KSEG layout help for the required address alignment.
+	  Unpacked kernel image (including vectors) must be located completely
+	  within KSEG.
+	  Physical memory below this address is not available to linux.
+
+	  If unsure, leave the default value here.
+
+config KERNEL_VIRTUAL_ADDRESS
+	hex "Kernel virtual address"
+	depends on MMU && XIP_KERNEL
+	default 0xd0003000
+	help
+	  This is the virtual address where the XIP kernel is mapped.
+	  XIP kernel may be mapped into KSEG or KIO region, virtual address
+	  provided here must match kernel load address provided in
+	  KERNEL_LOAD_ADDRESS.
+
+config KERNEL_LOAD_ADDRESS
+	hex "Kernel load address"
+	default 0x60003000 if !MMU
+	default 0x00003000 if MMU && INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
+	default 0xd0003000 if MMU && !INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
+	help
+	  This is the address where the kernel is loaded.
+	  It is virtual address for MMUv2 configurations and physical address
+	  for all other configurations.
+
+	  If unsure, leave the default value here.
+
+choice
+	prompt "Relocatable vectors location"
+	default XTENSA_VECTORS_IN_TEXT
+	help
+	  Choose whether relocatable vectors are merged into the kernel .text
+	  or placed separately at runtime. This option does not affect
+	  configurations without VECBASE register where vectors are always
+	  placed at their hardware-defined locations.
+
+config XTENSA_VECTORS_IN_TEXT
+	bool "Merge relocatable vectors into kernel text"
+	depends on !MTD_XIP
+	help
+	  This option puts relocatable vectors into the kernel .text section
+	  with proper alignment.
+	  This is a safe choice for most configurations.
+
+config XTENSA_VECTORS_SEPARATE
+	bool "Put relocatable vectors at fixed address"
+	help
+	  This option puts relocatable vectors at specific virtual address.
+	  Vectors are merged with the .init data in the kernel image and
+	  are copied into their designated location during kernel startup.
+	  Use it to put vectors into IRAM or out of FLASH on kernels with
+	  XIP-aware MTD support.
+
+endchoice
+
+config VECTORS_ADDR
+	hex "Kernel vectors virtual address"
+	default 0x00000000
+	depends on XTENSA_VECTORS_SEPARATE
+	help
+	  This is the virtual address of the (relocatable) vectors base.
+	  It must be within KSEG if MMU is used.
+
+config XIP_DATA_ADDR
+	hex "XIP kernel data virtual address"
+	depends on XIP_KERNEL
+	default 0x00000000
+	help
+	  This is the virtual address where XIP kernel data is copied.
+	  It must be within KSEG if MMU is used.
+
+config PLATFORM_WANT_DEFAULT_MEM
+	def_bool n
+
+config DEFAULT_MEM_START
+	hex
+	prompt "PAGE_OFFSET/PHYS_OFFSET" if !MMU && PLATFORM_WANT_DEFAULT_MEM
+	default 0x60000000 if PLATFORM_WANT_DEFAULT_MEM
+	default 0x00000000
+	help
+	  This is the base address used for both PAGE_OFFSET and PHYS_OFFSET
+	  in noMMU configurations.
+
+	  If unsure, leave the default value here.
+
+choice
+	prompt "KSEG layout"
+	depends on MMU
+	default XTENSA_KSEG_MMU_V2
+
+config XTENSA_KSEG_MMU_V2
+	bool "MMUv2: 128MB cached + 128MB uncached"
+	help
+	  MMUv2 compatible kernel memory map: TLB way 5 maps 128MB starting
+	  at KSEG_PADDR to 0xd0000000 with cache and to 0xd8000000
+	  without cache.
+	  KSEG_PADDR must be aligned to 128MB.
+
+config XTENSA_KSEG_256M
+	bool "256MB cached + 256MB uncached"
+	depends on INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
+	help
+	  TLB way 6 maps 256MB starting at KSEG_PADDR to 0xb0000000
+	  with cache and to 0xc0000000 without cache.
+	  KSEG_PADDR must be aligned to 256MB.
+
+config XTENSA_KSEG_512M
+	bool "512MB cached + 512MB uncached"
+	depends on INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
+	help
+	  TLB way 6 maps 512MB starting at KSEG_PADDR to 0xa0000000
+	  with cache and to 0xc0000000 without cache.
+	  KSEG_PADDR must be aligned to 256MB.
+
+endchoice
+
+config HIGHMEM
+	bool "High Memory Support"
+	depends on MMU
+	select KMAP_LOCAL
+	help
+	  Linux can use the full amount of RAM in the system by
+	  default. However, the default MMUv2 setup only maps the
+	  lowermost 128 MB of memory linearly to the areas starting
+	  at 0xd0000000 (cached) and 0xd8000000 (uncached).
+	  When there are more than 128 MB memory in the system not
+	  all of it can be "permanently mapped" by the kernel.
+	  The physical memory that's not permanently mapped is called
+	  "high memory".
+
+	  If you are compiling a kernel which will never run on a
+	  machine with more than 128 MB total physical RAM, answer
+	  N here.
+
+	  If unsure, say Y.
+
+config ARCH_FORCE_MAX_ORDER
+	int "Maximum zone order"
+	default "11"
+	help
+	  The kernel memory allocator divides physically contiguous memory
+	  blocks into "zones", where each zone is a power of two number of
+	  pages.  This option selects the largest power of two that the kernel
+	  keeps in the memory allocator.  If you need to allocate very large
+	  blocks of physically contiguous memory, then you may need to
+	  increase this value.
+
+	  This config option is actually maximum order plus one. For example,
+	  a value of 11 means that the largest free memory block is 2^10 pages.
+
+endmenu
+
+menu "Power management options"
+
+config ARCH_HIBERNATION_POSSIBLE
+	def_bool y
+
+source "kernel/power/Kconfig"
+
+endmenu
diff --git a/arch/xtensa/Kconfig.debug b/arch/xtensa/Kconfig.debug
new file mode 100644
index 000000000..83cc8d12f
--- /dev/null
+++ b/arch/xtensa/Kconfig.debug
@@ -0,0 +1,40 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config DEBUG_TLB_SANITY
+	bool "Debug TLB sanity"
+	depends on DEBUG_KERNEL && MMU
+	help
+	  Enable this to turn on TLB sanity check on each entry to userspace.
+	  This check can spot missing TLB invalidation/wrong PTE permissions/
+	  premature page freeing.
+
+	  If unsure, say N.
+
+config LD_NO_RELAX
+	bool "Disable linker relaxation"
+	default y
+	help
+	  Enable this function to disable link-time optimizations.
+	  The default linker behavior is to combine identical literal
+	  values to reduce code size and remove unnecessary overhead from
+	  assembler-generated 'longcall' sequences.
+	  Enabling this option improves the link time but increases the
+	  code size, and possibly execution time.
+
+config S32C1I_SELFTEST
+	bool "Perform S32C1I instruction self-test at boot"
+	default y
+	help
+	  Enable this option to test S32C1I instruction behavior at boot.
+	  Correct operation of this instruction requires some cooperation from hardware
+	  external to the processor (such as bus bridge, bus fabric, or memory controller).
+	  It is easy to make wrong hardware configuration, this test should catch it early.
+
+	  Say 'N' on stable hardware.
+
+config PRINT_STACK_DEPTH
+	int "Stack depth to print" if DEBUG_KERNEL
+	default 64
+	help
+	  This option allows you to set the stack depth that the kernel
+	  prints in stack traces.
diff --git a/arch/xtensa/Makefile b/arch/xtensa/Makefile
new file mode 100644
index 000000000..bfd8e433e
--- /dev/null
+++ b/arch/xtensa/Makefile
@@ -0,0 +1,73 @@
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 2001 - 2005  Tensilica Inc.
+# Copyright (C) 2014 Cadence Design Systems Inc.
+#
+# This file is included by the global makefile so that you can add your own
+# architecture-specific flags and dependencies.
+
+# Core configuration.
+# (Use VAR=<xtensa_config> to use another default compiler.)
+
+variant-y := $(CONFIG_XTENSA_VARIANT_NAME)
+
+VARIANT = $(variant-y)
+
+ifneq ($(VARIANT),)
+  ifdef cross_compiling
+    ifndef CROSS_COMPILE
+      CROSS_COMPILE = xtensa_$(VARIANT)-
+    endif
+  endif
+endif
+
+# Platform configuration
+
+platform-$(CONFIG_XTENSA_PLATFORM_XT2000)	:= xt2000
+platform-$(CONFIG_XTENSA_PLATFORM_ISS)		:= iss
+platform-$(CONFIG_XTENSA_PLATFORM_XTFPGA)	:= xtfpga
+
+# temporarily until string.h is fixed
+KBUILD_CFLAGS += -ffreestanding -D__linux__
+KBUILD_CFLAGS += -pipe -mlongcalls -mtext-section-literals
+KBUILD_CFLAGS += $(call cc-option,-mforce-no-pic,)
+KBUILD_CFLAGS += $(call cc-option,-mno-serialize-volatile,)
+ifneq ($(CONFIG_KERNEL_ABI_CALL0),)
+KBUILD_CFLAGS += -mabi=call0
+KBUILD_AFLAGS += -mabi=call0
+endif
+
+KBUILD_AFLAGS += -mlongcalls -mtext-section-literals
+
+ifneq ($(CONFIG_LD_NO_RELAX),)
+KBUILD_LDFLAGS := --no-relax
+endif
+
+CHECKFLAGS += -D$(if $(CONFIG_CPU_BIG_ENDIAN),__XTENSA_EB__,__XTENSA_EL__)
+
+vardirs := $(patsubst %,arch/xtensa/variants/%/,$(variant-y))
+plfdirs := $(patsubst %,arch/xtensa/platforms/%/,$(platform-y))
+
+KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(vardirs) $(plfdirs))
+
+KBUILD_DEFCONFIG := iss_defconfig
+
+libs-y		+= arch/xtensa/lib/
+
+boot		:= arch/xtensa/boot
+
+all Image zImage uImage xipImage: vmlinux
+	$(Q)$(MAKE) $(build)=$(boot) $@
+
+archheaders:
+	$(Q)$(MAKE) $(build)=arch/xtensa/kernel/syscalls all
+
+define archhelp
+  @echo '* Image       - Kernel ELF image with reset vector'
+  @echo '* zImage      - Compressed kernel image (arch/xtensa/boot/images/zImage.*)'
+  @echo '* uImage      - U-Boot wrapped image'
+  @echo '  xipImage    - XIP image'
+endef
diff --git a/arch/xtensa/boot/.gitignore b/arch/xtensa/boot/.gitignore
new file mode 100644
index 000000000..615f1f741
--- /dev/null
+++ b/arch/xtensa/boot/.gitignore
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+uImage
+zImage.redboot
diff --git a/arch/xtensa/boot/Makefile b/arch/xtensa/boot/Makefile
new file mode 100644
index 000000000..d8b0fadf4
--- /dev/null
+++ b/arch/xtensa/boot/Makefile
@@ -0,0 +1,53 @@
+#
+# arch/xtensa/boot/Makefile
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+#
+
+
+# KBUILD_CFLAGS used when building rest of boot (takes effect recursively)
+KBUILD_CFLAGS	+= -fno-builtin
+
+subdir-y	:= lib
+targets		+= vmlinux.bin vmlinux.bin.gz
+targets		+= uImage xipImage
+
+# Subdirs for the boot loader(s)
+
+boot-$(CONFIG_XTENSA_PLATFORM_ISS)    += Image
+boot-$(CONFIG_XTENSA_PLATFORM_XT2000) += Image zImage uImage
+boot-$(CONFIG_XTENSA_PLATFORM_XTFPGA) += Image zImage uImage
+
+all: $(boot-y)
+Image: boot-elf
+zImage: boot-redboot
+uImage: $(obj)/uImage
+xipImage: $(obj)/xipImage
+
+boot-elf boot-redboot: $(addprefix $(obj)/,$(subdir-y))
+	$(Q)$(MAKE) $(build)=$(obj)/$@ $(MAKECMDGOALS)
+
+OBJCOPYFLAGS = --strip-all -R .comment -R .notes -O binary
+
+$(obj)/vmlinux.bin: vmlinux FORCE
+	$(call if_changed,objcopy)
+
+$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,gzip)
+
+boot-elf: $(obj)/vmlinux.bin
+boot-redboot: $(obj)/vmlinux.bin.gz
+
+UIMAGE_LOADADDR = $(CONFIG_KERNEL_LOAD_ADDRESS)
+UIMAGE_COMPRESSION = gzip
+
+$(obj)/uImage: $(obj)/vmlinux.bin.gz FORCE
+	$(call if_changed,uimage)
+	$(Q)$(kecho) '  Kernel: $@ is ready'
+
+$(obj)/xipImage: vmlinux FORCE
+	$(call if_changed,objcopy)
+	$(Q)$(kecho) '  Kernel: $@ is ready'
diff --git a/arch/xtensa/boot/boot-elf/.gitignore b/arch/xtensa/boot/boot-elf/.gitignore
new file mode 100644
index 000000000..747340450
--- /dev/null
+++ b/arch/xtensa/boot/boot-elf/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+boot.lds
diff --git a/arch/xtensa/boot/boot-elf/Makefile b/arch/xtensa/boot/boot-elf/Makefile
new file mode 100644
index 000000000..faec20029
--- /dev/null
+++ b/arch/xtensa/boot/boot-elf/Makefile
@@ -0,0 +1,30 @@
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+
+OBJCOPY_ARGS := -O $(if $(CONFIG_CPU_BIG_ENDIAN),elf32-xtensa-be,elf32-xtensa-le)
+
+CPPFLAGS_boot.lds += -P -C
+KBUILD_AFLAGS += -mtext-section-literals
+
+boot-y		:= bootstrap.o
+targets		+= $(boot-y) boot.lds
+
+OBJS		:= $(addprefix $(obj)/,$(boot-y))
+
+$(obj)/Image.o: $(obj)/../vmlinux.bin $(OBJS)
+	$(Q)$(OBJCOPY) $(OBJCOPY_ARGS) -R .comment \
+		--add-section image=$< \
+		--set-section-flags image=contents,alloc,load,load,data \
+		$(OBJS) $@
+
+$(obj)/../Image.elf: $(obj)/Image.o $(obj)/boot.lds
+	$(Q)$(LD) $(KBUILD_LDFLAGS) \
+		-T $(obj)/boot.lds \
+		--build-id=none \
+		-o $@ $(obj)/Image.o
+	$(Q)$(kecho) '  Kernel: $@ is ready'
+
+all Image: $(obj)/../Image.elf
diff --git a/arch/xtensa/boot/boot-elf/boot.lds.S b/arch/xtensa/boot/boot-elf/boot.lds.S
new file mode 100644
index 000000000..32a3b7c5b
--- /dev/null
+++ b/arch/xtensa/boot/boot-elf/boot.lds.S
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ *  linux/arch/xtensa/boot/boot-elf/boot.lds.S
+ *
+ *  Copyright (C) 2008 - 2013 by Tensilica Inc.
+ *
+ *  Chris Zankel <chris@zankel.net>
+ *  Marc Gauthier <marc@tensilica.com
+ *  Pete Delaney <piet@tensilica.com>
+ */
+
+#include <asm/vectors.h>
+OUTPUT_ARCH(xtensa)
+ENTRY(_ResetVector)
+
+SECTIONS
+{
+	.ResetVector.text XCHAL_RESET_VECTOR_VADDR :
+	{
+		*(.ResetVector.text)
+	}
+
+	.image KERNELOFFSET: AT (CONFIG_KERNEL_LOAD_ADDRESS)
+	{
+		_image_start = .;
+		*(image)
+		. = (. + 3) & ~ 3;
+		_image_end = .	;
+	}
+
+	.bss ((LOADADDR(.image) + SIZEOF(.image) + 3) & ~ 3):
+	{
+		__bss_start = .;
+		*(.sbss)
+		*(.scommon)
+		*(.dynbss)
+		*(.bss)
+		__bss_end = .;
+	}
+}
diff --git a/arch/xtensa/boot/boot-elf/bootstrap.S b/arch/xtensa/boot/boot-elf/bootstrap.S
new file mode 100644
index 000000000..2dd28931d
--- /dev/null
+++ b/arch/xtensa/boot/boot-elf/bootstrap.S
@@ -0,0 +1,79 @@
+/*
+ * arch/xtensa/boot/boot-elf/bootstrap.S
+ *
+ * Low-level exception handling
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2004 - 2013 by Tensilica Inc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ * Marc Gauthier <marc@tensilica.com>
+ * Piet Delaney <piet@tensilica.com>
+ */
+
+#include <asm/bootparam.h>
+#include <asm/initialize_mmu.h>
+#include <asm/vectors.h>
+#include <linux/linkage.h>
+
+	.section	.ResetVector.text, "ax"
+	.global         _ResetVector
+	.global         reset
+
+_ResetVector:
+	_j _SetupMMU
+
+	.begin  no-absolute-literals
+	.literal_position
+
+#ifdef CONFIG_PARSE_BOOTPARAM
+	.align 4
+_bootparam:
+	.short	BP_TAG_FIRST
+	.short	4
+	.long	BP_VERSION
+	.short	BP_TAG_LAST
+	.short	0
+	.long	0
+#endif
+
+	.align  4
+_SetupMMU:
+#if XCHAL_HAVE_WINDOWED
+	movi	a0, 0
+	wsr	a0, windowbase
+	rsync
+	movi	a0, 1
+	wsr	a0, windowstart
+	rsync
+#endif
+	movi	a0, 0x1F
+	wsr	a0, ps
+	rsync
+
+#ifndef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
+	initialize_mmu
+#endif
+
+	rsil    a0, XCHAL_DEBUGLEVEL-1
+	rsync
+reset:
+#if defined(CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX) && \
+	XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
+	movi	a0, CONFIG_KERNEL_LOAD_ADDRESS
+#else
+	movi	a0, KERNELOFFSET
+#endif
+#ifdef CONFIG_PARSE_BOOTPARAM
+	movi	a2, _bootparam
+#else
+	movi	a2, 0
+#endif
+	movi	a3, 0
+	movi	a4, 0
+	jx      a0
+
+	.end    no-absolute-literals
diff --git a/arch/xtensa/boot/boot-redboot/Makefile b/arch/xtensa/boot/boot-redboot/Makefile
new file mode 100644
index 000000000..1d1d46215
--- /dev/null
+++ b/arch/xtensa/boot/boot-redboot/Makefile
@@ -0,0 +1,32 @@
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+
+OBJCOPY_ARGS := -O $(if $(CONFIG_CPU_BIG_ENDIAN),elf32-xtensa-be,elf32-xtensa-le)
+
+LD_ARGS	= -T $(srctree)/$(obj)/boot.ld
+
+boot-y	:= bootstrap.o
+targets	+= $(boot-y)
+
+OBJS	:= $(addprefix $(obj)/,$(boot-y))
+LIBS	:= arch/xtensa/boot/lib/lib.a arch/xtensa/lib/lib.a
+
+LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
+
+$(obj)/zImage.o: $(obj)/../vmlinux.bin.gz $(OBJS)
+	$(Q)$(OBJCOPY) $(OBJCOPY_ARGS) -R .comment \
+		--add-section image=$< \
+		--set-section-flags image=contents,alloc,load,load,data \
+		$(OBJS) $@
+
+$(obj)/zImage.elf: $(obj)/zImage.o $(LIBS)
+	$(Q)$(LD) $(LD_ARGS) -o $@ $^ -L/xtensa-elf/lib $(LIBGCC)
+
+$(obj)/../zImage.redboot: $(obj)/zImage.elf
+	$(Q)$(OBJCOPY) -S -O binary $< $@
+	$(Q)$(kecho) '  Kernel: $@ is ready'
+
+all zImage: $(obj)/../zImage.redboot
diff --git a/arch/xtensa/boot/boot-redboot/boot.ld b/arch/xtensa/boot/boot-redboot/boot.ld
new file mode 100644
index 000000000..b0b9e95b5
--- /dev/null
+++ b/arch/xtensa/boot/boot-redboot/boot.ld
@@ -0,0 +1,59 @@
+OUTPUT_ARCH(xtensa)
+
+SECTIONS
+{
+	.start 0xD1000000 : { *(.start) }
+
+	.text :
+	{
+		__reloc_start = . ;
+		_text_start = . ;
+		*(.literal .text.literal .text)
+		_text_end = . ;
+	}
+
+	.rodata ALIGN(0x04):
+	{
+		*(.rodata)
+		*(.rodata1)
+	}
+
+	.data ALIGN(0x04):
+	{
+		*(.data)
+		*(.data1)
+		*(.sdata)
+		*(.sdata2)
+		*(.got.plt)
+		*(.got)
+		*(.dynamic)
+	}
+
+	__reloc_end = . ;
+
+	. = ALIGN(0x10);
+	__image_load = . ;
+	.image 0xd0003000: AT(__image_load)
+	{
+		_image_start = .;
+		*(image)
+		. = (. + 3) & ~ 3;
+		_image_end = .	;
+	}
+
+
+	.bss ((LOADADDR(.image) + SIZEOF(.image) + 3) & ~ 3):
+	{
+		__bss_start = .;
+		*(.sbss)
+		*(.scommon)
+		*(.dynbss)
+		*(.bss)
+		__bss_end = .;
+	}
+	_end = .;
+	_param_start = .;
+
+
+	PROVIDE (end = .);
+}
diff --git a/arch/xtensa/boot/boot-redboot/bootstrap.S b/arch/xtensa/boot/boot-redboot/bootstrap.S
new file mode 100644
index 000000000..3ed94ad35
--- /dev/null
+++ b/arch/xtensa/boot/boot-redboot/bootstrap.S
@@ -0,0 +1,255 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <asm/core.h>
+#include <asm/regs.h>
+#include <asm/asmmacro.h>
+#include <asm/cacheasm.h>
+#include <asm/processor.h>
+	/*
+	 * RB-Data: RedBoot data/bss
+	 * P:	    Boot-Parameters
+	 * L:	    Kernel-Loader
+	 *
+	 * The Linux-Kernel image including the loader must be loaded
+	 * to a position so that the kernel and the boot parameters
+	 * can fit in the space before the load address.
+	 *  ______________________________________________________
+	 * |_RB-Data_|_P_|__________|_L_|___Linux-Kernel___|______|
+	 *                          ^
+	 *                          ^ Load address
+	 *  ______________________________________________________
+	 * |___Linux-Kernel___|_P_|_L_|___________________________|
+	 *
+	 * The loader copies the parameter to the position that will
+	 * be the end of the kernel and itself to the end of the
+	 * parameter list.
+	 */
+
+/* Make sure we have enough space for the 'uncompressor' */
+
+#define STACK_SIZE 32768
+#define HEAP_SIZE (131072*4)
+
+	# a2: Parameter list
+	# a3: Size of parameter list
+
+	.section .start, "ax"
+
+	.globl __start
+	/* this must be the first byte of the loader! */
+__start:
+	abi_entry(32)		# we do not intend to return
+	_call0	_start
+__start_a0:
+	.align 4
+
+	.section .text, "ax"
+	.literal_position
+	.begin literal_prefix .text
+
+	/* put literals in here! */
+
+	.globl _start
+_start:
+
+	/* 'reset' window registers */
+
+	movi	a4, 1
+	wsr	a4, ps
+	rsync
+#if XCHAL_HAVE_WINDOWED
+	rsr	a5, windowbase
+	ssl	a5
+	sll	a4, a4
+	wsr	a4, windowstart
+	rsync
+#endif
+	movi	a4, KERNEL_PS_WOE_MASK
+	wsr	a4, ps
+	rsync
+
+KABI_C0	mov	abi_saved0, abi_arg0
+
+	/* copy the loader to its address
+	 * Note: The loader itself is a very small piece, so we assume we
+	 *       don't partially overlap. We also assume (even more important)
+	 *	 that the kernel image is out of the way. Usually, when the
+	 *	 load address of this image is not at an arbitrary address,
+	 *	 but aligned to some 10K's we shouldn't overlap.
+	 */
+
+	/* Note: The assembler cannot relax "addi a0, a0, ..." to an
+	   l32r, so we load to a4 first. */
+
+	# addi	a4, a0, __start - __start_a0
+	# mov	a0, a4
+
+	movi	a4, __start
+	movi	a5, __start_a0
+	add	a4, a0, a4
+	sub	a0, a4, a5
+
+	movi	a4, __start
+	movi	a5, __reloc_end
+
+	# a0: address where this code has been loaded
+	# a4: compiled address of __start
+	# a5: compiled end address
+
+	mov.n	a7, a0
+	mov.n	a8, a4
+
+1:
+	l32i	a10, a7, 0
+	l32i	a11, a7, 4
+	s32i	a10, a8, 0
+	s32i	a11, a8, 4
+	l32i	a10, a7, 8
+	l32i	a11, a7, 12
+	s32i	a10, a8, 8
+	s32i	a11, a8, 12
+	addi	a8, a8, 16
+	addi	a7, a7, 16
+	blt	a8, a5, 1b
+
+
+	/* We have to flush and invalidate the caches here before we jump. */
+
+#if XCHAL_DCACHE_IS_WRITEBACK
+
+	___flush_dcache_all a5 a6
+
+#endif
+
+	___invalidate_icache_all a5 a6
+	isync
+
+	movi	a11, _reloc
+	jx	a11
+
+	.globl _reloc
+_reloc:
+
+	/* RedBoot is now at the end of the memory, so we don't have
+	 * to copy the parameter list. Keep the code around; in case
+	 * we need it again. */
+#if 0
+	# a0: load address
+	# a2: start address of parameter list
+	# a3: length of parameter list
+	# a4: __start
+
+	/* copy the parameter list out of the way */
+
+	movi	a6, _param_start
+	add	a3, a2, a3
+2:
+	l32i	a8, a2, 0
+	s32i	a8, a6, 0
+	addi	a2, a2, 4
+	addi	a6, a6, 4
+	blt	a2, a3, 2b
+#endif
+
+	/* clear BSS section */
+	movi	a6, __bss_start
+	movi	a7, __bss_end
+	movi.n	a5, 0
+3:
+	s32i	a5, a6, 0
+	addi	a6, a6, 4
+	blt	a6, a7, 3b
+
+	movi	a5, -16
+	movi	a1, _stack + STACK_SIZE
+	and	a1, a1, a5
+
+	/* Uncompress the kernel */
+
+	# a0: load address
+	# a2: boot parameter
+	# a4: __start
+
+	movi	a3, __image_load
+	sub	a4, a3, a4
+	add	abi_arg2, a0, a4
+
+	# a1  Stack
+	# a8(a4)  Load address of the image
+
+	movi	abi_arg0, _image_start
+	movi	abi_arg4, _image_end
+	movi	abi_arg1, 0x1000000
+	sub	abi_tmp0, abi_arg4, abi_arg0
+	movi	abi_arg3, complen
+	s32i	abi_tmp0, abi_arg3, 0
+
+	movi	a0, 0
+
+	# abi_arg0 destination
+	# abi_arg1 maximum size of destination
+	# abi_arg2 source
+	# abi_arg3 ptr to length
+
+	.extern gunzip
+	movi	abi_tmp0, gunzip
+	beqz	abi_tmp0, 1f
+
+	abi_callx	abi_tmp0
+
+	j	2f
+
+
+	# abi_arg0 destination start
+	# abi_arg1 maximum size of destination
+	# abi_arg2 source start
+	# abi_arg3 ptr to length
+	# abi_arg4 destination end
+
+1:
+        l32i    abi_tmp0, abi_arg2, 0
+        l32i    abi_tmp1, abi_arg2, 4
+        s32i    abi_tmp0, abi_arg0, 0
+        s32i    abi_tmp1, abi_arg0, 4
+        l32i    abi_tmp0, abi_arg2, 8
+        l32i    abi_tmp1, abi_arg2, 12
+        s32i    abi_tmp0, abi_arg0, 8
+        s32i    abi_tmp1, abi_arg0, 12
+        addi    abi_arg0, abi_arg0, 16
+        addi    abi_arg2, abi_arg2, 16
+        blt     abi_arg0, abi_arg4, 1b
+
+
+	/* jump to the kernel */
+2:
+#if XCHAL_DCACHE_IS_WRITEBACK
+
+	___flush_dcache_all a5 a6
+
+#endif
+
+	___invalidate_icache_all a5 a6
+
+	isync
+
+	# a2  Boot parameter list
+
+KABI_C0	mov	abi_arg0, abi_saved0
+	movi	a0, _image_start
+	jx	a0
+
+	.align 16
+	.data
+	.globl avail_ram
+avail_ram:
+	.long	_heap
+	.globl end_avail
+end_avail:
+	.long	_heap + HEAP_SIZE
+
+	.comm _stack, STACK_SIZE
+	.comm _heap, HEAP_SIZE
+
+	.globl end_avail
+	.comm complen, 4
+
+	.end	literal_prefix
diff --git a/arch/xtensa/boot/dts/Makefile b/arch/xtensa/boot/dts/Makefile
new file mode 100644
index 000000000..720628c0d
--- /dev/null
+++ b/arch/xtensa/boot/dts/Makefile
@@ -0,0 +1,14 @@
+#
+# arch/xtensa/boot/dts/Makefile
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+#
+
+obj-$(CONFIG_OF) += $(addsuffix .dtb.o, $(CONFIG_BUILTIN_DTB_SOURCE))
+
+# for CONFIG_OF_ALL_DTBS test
+dtstree	:= $(srctree)/$(src)
+dtb-	:= $(patsubst $(dtstree)/%.dts,%.dtb, $(wildcard $(dtstree)/*.dts))
diff --git a/arch/xtensa/boot/dts/csp.dts b/arch/xtensa/boot/dts/csp.dts
new file mode 100644
index 000000000..885495460
--- /dev/null
+++ b/arch/xtensa/boot/dts/csp.dts
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+
+/ {
+	compatible = "cdns,xtensa-xtfpga";
+	#address-cells = <1>;
+	#size-cells = <1>;
+	interrupt-parent = <&pic>;
+
+	chosen {
+		bootargs = "earlycon=cdns,0xfd000000,115200 console=tty0 console=ttyPS0,115200 root=/dev/ram0 rw earlyprintk xilinx_uartps.rx_trigger_level=32 loglevel=8 nohz=off ignore_loglevel";
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x00000000 0x40000000>;
+	};
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		cpu@0 {
+			compatible = "cdns,xtensa-cpu";
+			reg = <0>;
+		};
+	};
+
+	pic: pic {
+		compatible = "cdns,xtensa-pic";
+		#interrupt-cells = <2>;
+		interrupt-controller;
+	};
+
+	clocks {
+		osc: main-oscillator {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+		};
+	};
+
+	soc {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "simple-bus";
+		ranges = <0x00000000 0xf0000000 0x10000000>;
+
+		uart0: serial@0d000000 {
+			compatible = "xlnx,xuartps", "cdns,uart-r1p8";
+			clocks = <&osc>, <&osc>;
+			clock-names = "uart_clk", "pclk";
+			reg = <0x0d000000 0x1000>;
+			interrupts = <0 1>;
+		};
+	};
+};
diff --git a/arch/xtensa/boot/dts/kc705.dts b/arch/xtensa/boot/dts/kc705.dts
new file mode 100644
index 000000000..6887ff090
--- /dev/null
+++ b/arch/xtensa/boot/dts/kc705.dts
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+/include/ "xtfpga.dtsi"
+/include/ "xtfpga-flash-128m.dtsi"
+
+/ {
+	compatible = "cdns,xtensa-kc705";
+	chosen {
+		bootargs = "earlycon=uart8250,mmio32native,0xfd050020,115200n8 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw debug memmap=0x38000000";
+	};
+	memory@0 {
+		device_type = "memory";
+		reg = <0x00000000 0x38000000>;
+	};
+
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		/* global autoconfigured region for contiguous allocations */
+		linux,cma {
+			compatible = "shared-dma-pool";
+			reusable;
+			size = <0x04000000>;
+			alignment = <0x2000>;
+			alloc-ranges = <0x00000000 0x20000000>;
+			linux,cma-default;
+		};
+	};
+};
diff --git a/arch/xtensa/boot/dts/kc705_nommu.dts b/arch/xtensa/boot/dts/kc705_nommu.dts
new file mode 100644
index 000000000..d8e194a0f
--- /dev/null
+++ b/arch/xtensa/boot/dts/kc705_nommu.dts
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+/include/ "xtfpga.dtsi"
+/include/ "xtfpga-flash-128m.dtsi"
+
+/ {
+	compatible = "cdns,xtensa-kc705";
+	chosen {
+		bootargs = "earlycon=uart8250,mmio32,0x9d050020,115200n8 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw debug";
+	};
+	memory@0 {
+		device_type = "memory";
+		reg = <0x60000000 0x10000000>;
+	};
+	soc {
+		ranges = <0x00000000 0x90000000 0x10000000>;
+	};
+};
diff --git a/arch/xtensa/boot/dts/lx200mx.dts b/arch/xtensa/boot/dts/lx200mx.dts
new file mode 100644
index 000000000..974a8d904
--- /dev/null
+++ b/arch/xtensa/boot/dts/lx200mx.dts
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+/include/ "xtfpga.dtsi"
+/include/ "xtfpga-flash-16m.dtsi"
+
+/ {
+	compatible = "cdns,xtensa-lx200";
+	memory@0 {
+		device_type = "memory";
+		reg = <0x00000000 0x06000000>;
+	};
+	pic: pic {
+		compatible = "cdns,xtensa-mx";
+		#interrupt-cells = <2>;
+		interrupt-controller;
+	};
+};
diff --git a/arch/xtensa/boot/dts/lx60.dts b/arch/xtensa/boot/dts/lx60.dts
new file mode 100644
index 000000000..7c203c1c7
--- /dev/null
+++ b/arch/xtensa/boot/dts/lx60.dts
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+/include/ "xtfpga.dtsi"
+/include/ "xtfpga-flash-4m.dtsi"
+
+/ {
+	compatible = "cdns,xtensa-lx60";
+	memory@0 {
+		device_type = "memory";
+		reg = <0x00000000 0x04000000>;
+	};
+};
diff --git a/arch/xtensa/boot/dts/ml605.dts b/arch/xtensa/boot/dts/ml605.dts
new file mode 100644
index 000000000..08e5c8d47
--- /dev/null
+++ b/arch/xtensa/boot/dts/ml605.dts
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+/include/ "xtfpga.dtsi"
+/include/ "xtfpga-flash-16m.dtsi"
+
+/ {
+	compatible = "cdns,xtensa-ml605";
+	memory@0 {
+		device_type = "memory";
+		reg = <0x00000000 0x08000000>;
+	};
+};
diff --git a/arch/xtensa/boot/dts/virt.dts b/arch/xtensa/boot/dts/virt.dts
new file mode 100644
index 000000000..611b98a02
--- /dev/null
+++ b/arch/xtensa/boot/dts/virt.dts
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+
+/ {
+	compatible = "cdns,xtensa-iss";
+	#address-cells = <1>;
+	#size-cells = <1>;
+	interrupt-parent = <&pic>;
+
+	chosen {
+		bootargs = "console=ttyS0,115200n8 debug";
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x00000000 0x80000000>;
+	};
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		cpu@0 {
+			compatible = "cdns,xtensa-cpu";
+			reg = <0>;
+			clocks = <&osc>;
+		};
+	};
+
+	clocks {
+		osc: osc {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <40000000>;
+		};
+	};
+
+	pic: pic {
+		compatible = "cdns,xtensa-pic";
+		/* one cell: internal irq number,
+		 * two cells: second cell == 0: internal irq number
+		 *            second cell == 1: external irq number
+		 */
+		#address-cells = <0>;
+		#interrupt-cells = <2>;
+		interrupt-controller;
+	};
+
+	pci {
+		compatible = "pci-host-ecam-generic";
+		device_type = "pci";
+		#address-cells = <3>;
+		#size-cells = <2>;
+		#interrupt-cells = <0x1>;
+
+		bus-range = <0x0 0x3e>;
+		reg = <0xf0100000 0x03f00000>;
+
+		     // BUS_ADDRESS(3)  CPU_PHYSICAL(1)  SIZE(2)
+		ranges = <0x01000000 0x0 0x00000000  0xf0000000  0x0 0x00010000>,
+			 <0x02000000 0x0 0xf4000000  0xf4000000  0x0 0x08000000>;
+
+		     // PCI_DEVICE(3)  INT#(1)  CONTROLLER(PHANDLE)  CONTROLLER_DATA(2)
+		interrupt-map = <
+			0x0000 0x0 0x0  0x1  &pic  0x0 0x1
+			0x0800 0x0 0x0  0x1  &pic  0x1 0x1
+			0x1000 0x0 0x0  0x1  &pic  0x2 0x1
+			0x1800 0x0 0x0  0x1  &pic  0x3 0x1
+			>;
+
+		interrupt-map-mask = <0x1800 0x0 0x0  0x7>;
+	};
+};
diff --git a/arch/xtensa/boot/dts/xtfpga-flash-128m.dtsi b/arch/xtensa/boot/dts/xtfpga-flash-128m.dtsi
new file mode 100644
index 000000000..c33932568
--- /dev/null
+++ b/arch/xtensa/boot/dts/xtfpga-flash-128m.dtsi
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0
+/ {
+	soc {
+		flash: flash@00000000 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "cfi-flash";
+			reg = <0x00000000 0x08000000>;
+			bank-width = <2>;
+			device-width = <2>;
+			partition@0 {
+				label = "data";
+				reg = <0x00000000 0x06000000>;
+			};
+			partition@6000000 {
+				label = "boot loader area";
+				reg = <0x06000000 0x00800000>;
+			};
+			partition@6800000 {
+				label = "kernel image";
+				reg = <0x06800000 0x017e0000>;
+			};
+			partition@7fe0000 {
+				label = "boot environment";
+				reg = <0x07fe0000 0x00020000>;
+			};
+		};
+        };
+};
diff --git a/arch/xtensa/boot/dts/xtfpga-flash-16m.dtsi b/arch/xtensa/boot/dts/xtfpga-flash-16m.dtsi
new file mode 100644
index 000000000..7bde2ab2d
--- /dev/null
+++ b/arch/xtensa/boot/dts/xtfpga-flash-16m.dtsi
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0
+/ {
+	soc {
+		flash: flash@08000000 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "cfi-flash";
+			reg = <0x08000000 0x01000000>;
+			bank-width = <2>;
+			device-width = <2>;
+			partition@0 {
+				label = "boot loader area";
+				reg = <0x00000000 0x00400000>;
+			};
+			partition@400000 {
+				label = "kernel image";
+				reg = <0x00400000 0x00600000>;
+			};
+			partition@a00000 {
+				label = "data";
+				reg = <0x00a00000 0x005e0000>;
+			};
+			partition@fe0000 {
+				label = "boot environment";
+				reg = <0x00fe0000 0x00020000>;
+			};
+		};
+	};
+};
diff --git a/arch/xtensa/boot/dts/xtfpga-flash-4m.dtsi b/arch/xtensa/boot/dts/xtfpga-flash-4m.dtsi
new file mode 100644
index 000000000..0655b8687
--- /dev/null
+++ b/arch/xtensa/boot/dts/xtfpga-flash-4m.dtsi
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0
+/ {
+	soc {
+		flash: flash@08000000 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "cfi-flash";
+			reg = <0x08000000 0x00400000>;
+			bank-width = <2>;
+			device-width = <2>;
+			partition@0 {
+				label = "boot loader area";
+				reg = <0x00000000 0x003f0000>;
+			};
+			partition@3f0000 {
+				label = "boot environment";
+				reg = <0x003f0000 0x00010000>;
+			};
+		};
+	};
+};
diff --git a/arch/xtensa/boot/dts/xtfpga.dtsi b/arch/xtensa/boot/dts/xtfpga.dtsi
new file mode 100644
index 000000000..e46ae07ba
--- /dev/null
+++ b/arch/xtensa/boot/dts/xtfpga.dtsi
@@ -0,0 +1,137 @@
+// SPDX-License-Identifier: GPL-2.0
+/ {
+	compatible = "cdns,xtensa-xtfpga";
+	#address-cells = <1>;
+	#size-cells = <1>;
+	interrupt-parent = <&pic>;
+
+	chosen {
+		bootargs = "earlycon=uart8250,mmio32native,0xfd050020,115200n8 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw debug";
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x00000000 0x06000000>;
+	};
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		cpu@0 {
+			compatible = "cdns,xtensa-cpu";
+			reg = <0>;
+			clocks = <&osc>;
+		};
+	};
+
+	pic: pic {
+		compatible = "cdns,xtensa-pic";
+		/* one cell: internal irq number,
+		 * two cells: second cell == 0: internal irq number
+		 *            second cell == 1: external irq number
+		 */
+		#interrupt-cells = <2>;
+		interrupt-controller;
+	};
+
+	clocks {
+		clk54: clk54 {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <54000000>;
+		};
+	};
+
+	soc {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "simple-bus";
+		ranges = <0x00000000 0xf0000000 0x10000000>;
+
+		osc: main-oscillator {
+			#clock-cells = <0>;
+			compatible = "cdns,xtfpga-clock";
+			reg = <0x0d020004 0x4>;
+		};
+
+		serial0: serial@0d050020 {
+			device_type = "serial";
+			compatible = "ns16550a";
+			no-loopback-test;
+			reg = <0x0d050020 0x20>;
+			reg-shift = <2>;
+			reg-io-width = <4>;
+			native-endian;
+			interrupts = <0 1>; /* external irq 0 */
+			clocks = <&osc>;
+		};
+
+		enet0: ethoc@0d030000 {
+			compatible = "opencores,ethoc";
+			reg = <0x0d030000 0x4000 0x0d800000 0x4000>;
+			native-endian;
+			interrupts = <1 1>; /* external irq 1 */
+			local-mac-address = [00 50 c2 13 6f 00];
+			clocks = <&osc>;
+		};
+
+		i2s0: xtfpga-i2s@0d080000 {
+			#sound-dai-cells = <0>;
+			compatible = "cdns,xtfpga-i2s";
+			reg = <0x0d080000 0x40>;
+			interrupts = <2 1>; /* external irq 2 */
+			clocks = <&cdce706 4>;
+		};
+
+		i2c0: i2c-master@0d090000 {
+			compatible = "opencores,i2c-ocores";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x0d090000 0x20>;
+			reg-shift = <2>;
+			reg-io-width = <4>;
+			native-endian;
+			interrupts = <4 1>;
+			clocks = <&osc>;
+
+			cdce706: clock-synth@69 {
+				compatible = "ti,cdce706";
+				#clock-cells = <1>;
+				reg = <0x69>;
+				clocks = <&clk54>;
+				clock-names = "clk_in0";
+			};
+		};
+
+		spi0: spi@0d0a0000 {
+			compatible = "cdns,xtfpga-spi";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x0d0a0000 0xc>;
+
+			tlv320aic23: sound-codec@0 {
+				#sound-dai-cells = <0>;
+				compatible = "tlv320aic23";
+				reg = <0>;
+				spi-max-frequency = <12500000>;
+			};
+		};
+	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,mclk-fs = <256>;
+
+		simple-audio-card,cpu {
+			sound-dai = <&i2s0>;
+		};
+
+		simple-audio-card,codec {
+			sound-dai = <&tlv320aic23>;
+			simple-audio-card,bitclock-master = <0>;
+			simple-audio-card,frame-master = <0>;
+			clocks = <&cdce706 4>;
+		};
+	};
+};
diff --git a/arch/xtensa/boot/lib/.gitignore b/arch/xtensa/boot/lib/.gitignore
new file mode 100644
index 000000000..805a82492
--- /dev/null
+++ b/arch/xtensa/boot/lib/.gitignore
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
+inffast.c
+inflate.c
+inftrees.c
diff --git a/arch/xtensa/boot/lib/Makefile b/arch/xtensa/boot/lib/Makefile
new file mode 100644
index 000000000..0378a22a0
--- /dev/null
+++ b/arch/xtensa/boot/lib/Makefile
@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for some libs needed by zImage.
+#
+
+zlib	:= inffast.c inflate.c inftrees.c
+
+lib-y	+= $(zlib:.c=.o) zmem.o
+
+ccflags-y	:= -I $(srctree)/lib/zlib_inflate
+ifdef CONFIG_FUNCTION_TRACER
+CFLAGS_REMOVE_inflate.o = -pg
+CFLAGS_REMOVE_zmem.o = -pg
+CFLAGS_REMOVE_inftrees.o = -pg
+CFLAGS_REMOVE_inffast.o = -pg
+endif
+
+KASAN_SANITIZE := n
+KCSAN_SANITIZE := n
+KCOV_INSTRUMENT := n
+GCOV_PROFILE := n
+
+CFLAGS_REMOVE_inflate.o += -fstack-protector -fstack-protector-strong
+CFLAGS_REMOVE_zmem.o += -fstack-protector -fstack-protector-strong
+CFLAGS_REMOVE_inftrees.o += -fstack-protector -fstack-protector-strong
+CFLAGS_REMOVE_inffast.o += -fstack-protector -fstack-protector-strong
+
+quiet_cmd_copy_zlib = COPY    $@
+      cmd_copy_zlib = cat $< > $@
+
+$(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
+	$(call cmd,copy_zlib)
+
+clean-files	:= $(zlib)
diff --git a/arch/xtensa/boot/lib/zmem.c b/arch/xtensa/boot/lib/zmem.c
new file mode 100644
index 000000000..b89189355
--- /dev/null
+++ b/arch/xtensa/boot/lib/zmem.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/zlib.h>
+
+/* bits taken from ppc */
+
+extern void *avail_ram, *end_avail;
+void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp);
+
+static void exit(void)
+{
+  for (;;);
+}
+
+static void *zalloc(unsigned int size)
+{
+        void *p = avail_ram;
+
+        size = (size + 7) & -8;
+        avail_ram += size;
+        if (avail_ram > end_avail) {
+                //puts("oops... out of memory\n");
+                //pause();
+                exit ();
+        }
+        return p;
+}
+
+#define HEAD_CRC        2
+#define EXTRA_FIELD     4
+#define ORIG_NAME       8
+#define COMMENT         0x10
+#define RESERVED        0xe0
+
+#define DEFLATED        8
+
+void gunzip (void *dst, int dstlen, unsigned char *src, int *lenp)
+{
+	z_stream s;
+	int r, i, flags;
+
+        /* skip header */
+        i = 10;
+        flags = src[3];
+        if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
+                //puts("bad gzipped data\n");
+                exit();
+        }
+        if ((flags & EXTRA_FIELD) != 0)
+                i = 12 + src[10] + (src[11] << 8);
+        if ((flags & ORIG_NAME) != 0)
+                while (src[i++] != 0)
+                        ;
+        if ((flags & COMMENT) != 0)
+                while (src[i++] != 0)
+                        ;
+        if ((flags & HEAD_CRC) != 0)
+                i += 2;
+        if (i >= *lenp) {
+                //puts("gunzip: ran out of data in header\n");
+                exit();
+        }
+
+	s.workspace = zalloc(zlib_inflate_workspacesize());
+        r = zlib_inflateInit2(&s, -MAX_WBITS);
+        if (r != Z_OK) {
+                //puts("inflateInit2 returned "); puthex(r); puts("\n");
+                exit();
+        }
+        s.next_in = src + i;
+        s.avail_in = *lenp - i;
+        s.next_out = dst;
+        s.avail_out = dstlen;
+        r = zlib_inflate(&s, Z_FINISH);
+        if (r != Z_OK && r != Z_STREAM_END) {
+                //puts("inflate returned "); puthex(r); puts("\n");
+                exit();
+        }
+        *lenp = s.next_out - (unsigned char *) dst;
+        zlib_inflateEnd(&s);
+}
+
diff --git a/arch/xtensa/configs/audio_kc705_defconfig b/arch/xtensa/configs/audio_kc705_defconfig
new file mode 100644
index 000000000..ef0ebcfbc
--- /dev/null
+++ b/arch/xtensa/configs/audio_kc705_defconfig
@@ -0,0 +1,137 @@
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_FHANDLE=y
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_IRQ_TIME_ACCOUNTING=y
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_CGROUP_DEBUG=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_DEVICE=y
+CONFIG_CPUSETS=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_MEMCG=y
+CONFIG_NAMESPACES=y
+CONFIG_SCHED_AUTOGROUP=y
+CONFIG_RELAY=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_EXPERT=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_PROFILING=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_XTENSA_VARIANT_CUSTOM=y
+CONFIG_XTENSA_VARIANT_CUSTOM_NAME="test_kc705_hifi"
+CONFIG_XTENSA_UNALIGNED_USER=y
+CONFIG_PREEMPT=y
+CONFIG_HIGHMEM=y
+# CONFIG_PCI is not set
+CONFIG_XTENSA_PLATFORM_XTFPGA=y
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="earlycon=uart8250,mmio32native,0xfd050020,115200n8 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw debug memmap=0x38000000@0"
+CONFIG_USE_OF=y
+CONFIG_BUILTIN_DTB_SOURCE="kc705"
+# CONFIG_COMPACTION is not set
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+CONFIG_PM=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+# CONFIG_IPV6 is not set
+CONFIG_NETFILTER=y
+# CONFIG_WIRELESS is not set
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_STANDALONE is not set
+CONFIG_MTD=y
+CONFIG_MTD_CFI=y
+CONFIG_MTD_JEDECPROBE=y
+CONFIG_MTD_CFI_INTELEXT=y
+CONFIG_MTD_CFI_AMDSTD=y
+CONFIG_MTD_CFI_STAA=y
+CONFIG_MTD_PHYSMAP_OF=y
+CONFIG_MTD_UBI=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_SCSI=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_NETDEVICES=y
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_SAMSUNG is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+# CONFIG_NET_VENDOR_SMSC is not set
+# CONFIG_NET_VENDOR_STMICRO is not set
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+CONFIG_MARVELL_PHY=y
+# CONFIG_WLAN is not set
+# CONFIG_INPUT_MOUSEDEV is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_SERIO is not set
+CONFIG_SERIAL_8250=y
+# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_HW_RANDOM=y
+CONFIG_I2C=y
+CONFIG_I2C_OCORES=y
+CONFIG_SPI=y
+CONFIG_SPI_XTENSA_XTFPGA=y
+# CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+CONFIG_WATCHDOG_NOWAYOUT=y
+CONFIG_SOFT_WATCHDOG=y
+# CONFIG_VGA_CONSOLE is not set
+CONFIG_SOUND=y
+CONFIG_SND=y
+CONFIG_SND_SOC=y
+CONFIG_SND_SOC_XTFPGA_I2S=y
+CONFIG_SND_SOC_TLV320AIC23_SPI=y
+CONFIG_SND_SIMPLE_CARD=y
+# CONFIG_USB_SUPPORT is not set
+CONFIG_COMMON_CLK_CDCE706=y
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT3_FS=y
+CONFIG_EXT4_FS=y
+CONFIG_FANOTIFY=y
+CONFIG_VFAT_FS=y
+CONFIG_PROC_KCORE=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_UBIFS_FS=y
+CONFIG_NFS_FS=y
+CONFIG_NFS_V4=y
+CONFIG_NFS_SWAP=y
+CONFIG_ROOT_NFS=y
+CONFIG_SUNRPC_DEBUG=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_PRINTK_TIME=y
+CONFIG_DYNAMIC_DEBUG=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_LOCKUP_DETECTOR=y
+# CONFIG_SCHED_DEBUG is not set
+CONFIG_SCHEDSTATS=y
+CONFIG_TIMER_STATS=y
+CONFIG_DEBUG_RT_MUTEXES=y
+CONFIG_DEBUG_SPINLOCK=y
+CONFIG_DEBUG_MUTEXES=y
+CONFIG_DEBUG_ATOMIC_SLEEP=y
+CONFIG_STACKTRACE=y
+CONFIG_RCU_TRACE=y
+# CONFIG_FTRACE is not set
+# CONFIG_S32C1I_SELFTEST is not set
+CONFIG_CRYPTO_ANSI_CPRNG=y
diff --git a/arch/xtensa/configs/cadence_csp_defconfig b/arch/xtensa/configs/cadence_csp_defconfig
new file mode 100644
index 000000000..2665962d2
--- /dev/null
+++ b/arch/xtensa/configs/cadence_csp_defconfig
@@ -0,0 +1,118 @@
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_USELIB=y
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_IRQ_TIME_ACCOUNTING=y
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CPUSETS=y
+CONFIG_CGROUP_DEVICE=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_CGROUP_DEBUG=y
+CONFIG_NAMESPACES=y
+CONFIG_SCHED_AUTOGROUP=y
+CONFIG_RELAY=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE="$$KERNEL_INITRAMFS_SOURCE"
+# CONFIG_RD_BZIP2 is not set
+# CONFIG_RD_LZMA is not set
+# CONFIG_RD_XZ is not set
+# CONFIG_RD_LZO is not set
+# CONFIG_RD_LZ4 is not set
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_EMBEDDED=y
+CONFIG_PROFILING=y
+CONFIG_MODULES=y
+CONFIG_MODULE_FORCE_LOAD=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_MODULE_FORCE_UNLOAD=y
+CONFIG_XTENSA_VARIANT_CUSTOM=y
+CONFIG_XTENSA_VARIANT_CUSTOM_NAME="csp"
+CONFIG_XTENSA_UNALIGNED_USER=y
+CONFIG_PREEMPT=y
+CONFIG_HIGHMEM=y
+# CONFIG_PCI is not set
+CONFIG_XTENSA_PLATFORM_XTFPGA=y
+CONFIG_USE_OF=y
+CONFIG_BUILTIN_DTB_SOURCE="csp"
+# CONFIG_COMPACTION is not set
+CONFIG_XTFPGA_LCD=y
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
+# CONFIG_INET_XFRM_MODE_TUNNEL is not set
+# CONFIG_INET_XFRM_MODE_BEET is not set
+# CONFIG_INET_DIAG is not set
+# CONFIG_IPV6 is not set
+# CONFIG_WIRELESS is not set
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_STANDALONE is not set
+# CONFIG_FW_LOADER is not set
+CONFIG_MTD=y
+CONFIG_MTD_CFI=y
+CONFIG_MTD_JEDECPROBE=y
+CONFIG_MTD_CFI_INTELEXT=y
+CONFIG_MTD_CFI_AMDSTD=y
+CONFIG_MTD_CFI_STAA=y
+CONFIG_MTD_PHYSMAP_OF=y
+CONFIG_MTD_UBI=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_SCSI=y
+CONFIG_BLK_DEV_SD=y
+# CONFIG_INPUT_MOUSEDEV is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+CONFIG_LEGACY_PTY_COUNT=16
+CONFIG_SERIAL_XILINX_PS_UART=y
+CONFIG_SERIAL_XILINX_PS_UART_CONSOLE=y
+CONFIG_HW_RANDOM=y
+# CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+CONFIG_WATCHDOG_NOWAYOUT=y
+CONFIG_SOFT_WATCHDOG=y
+# CONFIG_VGA_CONSOLE is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT3_FS=y
+CONFIG_FANOTIFY=y
+CONFIG_VFAT_FS=y
+CONFIG_PROC_KCORE=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_NFS_FS=y
+CONFIG_NFS_V4=y
+CONFIG_NFS_SWAP=y
+CONFIG_ROOT_NFS=y
+CONFIG_SUNRPC_DEBUG=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_PRINTK_TIME=y
+CONFIG_DYNAMIC_DEBUG=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_LOCKUP_DETECTOR=y
+# CONFIG_SCHED_DEBUG is not set
+CONFIG_SCHEDSTATS=y
+CONFIG_TIMER_STATS=y
+CONFIG_DEBUG_RT_MUTEXES=y
+CONFIG_PROVE_LOCKING=y
+CONFIG_DEBUG_ATOMIC_SLEEP=y
+CONFIG_RCU_TRACE=y
+CONFIG_FUNCTION_TRACER=y
+# CONFIG_S32C1I_SELFTEST is not set
+# CONFIG_CRYPTO_ECHAINIV is not set
+CONFIG_CRYPTO_DEFLATE=y
+CONFIG_CRYPTO_LZO=y
+# CONFIG_CRYPTO_HW is not set
diff --git a/arch/xtensa/configs/common_defconfig b/arch/xtensa/configs/common_defconfig
new file mode 100644
index 000000000..fa9389869
--- /dev/null
+++ b/arch/xtensa/configs/common_defconfig
@@ -0,0 +1,55 @@
+CONFIG_PCI=y
+CONFIG_SYSVIPC=y
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_LOG_BUF_SHIFT=14
+CONFIG_MODULES=y
+CONFIG_MODVERSIONS=y
+CONFIG_XTENSA_PLATFORM_XT2000=y
+CONFIG_GENERIC_CALIBRATE_DELAY=y
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="console=ttyS0,38400 ip=bootp root=nfs nfsroot=/opt/montavista/pro/devkit/xtensa/linux_be/target memmap=128M@0"
+CONFIG_BINFMT_MISC=y
+CONFIG_NET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_ADVANCED_ROUTER=y
+CONFIG_IP_MULTIPLE_TABLES=y
+CONFIG_IP_ROUTE_MULTIPATH=y
+CONFIG_IP_ROUTE_VERBOSE=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+# CONFIG_IPV6 is not set
+CONFIG_NET_SCHED=y
+CONFIG_NET_SCH_CBQ=m
+CONFIG_NET_SCH_HTB=m
+CONFIG_NET_SCH_PRIO=m
+CONFIG_NET_SCH_RED=m
+CONFIG_NET_SCH_SFQ=m
+CONFIG_NET_SCH_TEQL=m
+CONFIG_NET_SCH_TBF=m
+CONFIG_NET_SCH_GRED=m
+CONFIG_NET_SCH_DSMARK=m
+CONFIG_NET_CLS_TCINDEX=m
+CONFIG_NET_CLS_ROUTE4=m
+CONFIG_NET_CLS_FW=m
+CONFIG_NET_CLS_U32=m
+CONFIG_NET_CLS_RSVP=m
+CONFIG_NET_CLS_RSVP6=m
+CONFIG_NETDEVICES=y
+CONFIG_DUMMY=y
+# CONFIG_NET_VENDOR_3COM is not set
+# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_SERIO_SERPORT is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+# CONFIG_VGA_CONSOLE is not set
+CONFIG_NFS_FS=y
+CONFIG_ROOT_NFS=y
+# CONFIG_FRAME_POINTER is not set
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_DEBUG_KERNEL=y
diff --git a/arch/xtensa/configs/generic_kc705_defconfig b/arch/xtensa/configs/generic_kc705_defconfig
new file mode 100644
index 000000000..236c7f23c
--- /dev/null
+++ b/arch/xtensa/configs/generic_kc705_defconfig
@@ -0,0 +1,125 @@
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_FHANDLE=y
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_IRQ_TIME_ACCOUNTING=y
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_CGROUP_DEBUG=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_DEVICE=y
+CONFIG_CPUSETS=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_MEMCG=y
+CONFIG_NAMESPACES=y
+CONFIG_SCHED_AUTOGROUP=y
+CONFIG_RELAY=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_EXPERT=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_PROFILING=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_XTENSA_VARIANT_DC233C=y
+CONFIG_XTENSA_UNALIGNED_USER=y
+CONFIG_PREEMPT=y
+CONFIG_HIGHMEM=y
+# CONFIG_PCI is not set
+CONFIG_XTENSA_PLATFORM_XTFPGA=y
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="earlycon=uart8250,mmio32native,0xfd050020,115200n8 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw debug memmap=0x38000000@0"
+CONFIG_USE_OF=y
+CONFIG_BUILTIN_DTB_SOURCE="kc705"
+# CONFIG_COMPACTION is not set
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+# CONFIG_IPV6 is not set
+CONFIG_NETFILTER=y
+# CONFIG_WIRELESS is not set
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_STANDALONE is not set
+CONFIG_MTD=y
+CONFIG_MTD_CFI=y
+CONFIG_MTD_JEDECPROBE=y
+CONFIG_MTD_CFI_INTELEXT=y
+CONFIG_MTD_CFI_AMDSTD=y
+CONFIG_MTD_CFI_STAA=y
+CONFIG_MTD_PHYSMAP_OF=y
+CONFIG_MTD_UBI=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_SCSI=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_NETDEVICES=y
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_SAMSUNG is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+# CONFIG_NET_VENDOR_SMSC is not set
+# CONFIG_NET_VENDOR_STMICRO is not set
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+CONFIG_MARVELL_PHY=y
+# CONFIG_WLAN is not set
+# CONFIG_INPUT_MOUSEDEV is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_SERIO is not set
+CONFIG_SERIAL_8250=y
+# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_HW_RANDOM=y
+# CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+CONFIG_WATCHDOG_NOWAYOUT=y
+CONFIG_SOFT_WATCHDOG=y
+# CONFIG_VGA_CONSOLE is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT3_FS=y
+CONFIG_EXT4_FS=y
+CONFIG_FANOTIFY=y
+CONFIG_VFAT_FS=y
+CONFIG_PROC_KCORE=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_UBIFS_FS=y
+CONFIG_NFS_FS=y
+CONFIG_NFS_V4=y
+CONFIG_NFS_SWAP=y
+CONFIG_ROOT_NFS=y
+CONFIG_SUNRPC_DEBUG=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_PRINTK_TIME=y
+CONFIG_DYNAMIC_DEBUG=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_LOCKUP_DETECTOR=y
+# CONFIG_SCHED_DEBUG is not set
+CONFIG_SCHEDSTATS=y
+CONFIG_TIMER_STATS=y
+CONFIG_DEBUG_RT_MUTEXES=y
+CONFIG_DEBUG_SPINLOCK=y
+CONFIG_DEBUG_MUTEXES=y
+CONFIG_DEBUG_ATOMIC_SLEEP=y
+CONFIG_STACKTRACE=y
+CONFIG_RCU_TRACE=y
+# CONFIG_FTRACE is not set
+CONFIG_LD_NO_RELAX=y
+# CONFIG_S32C1I_SELFTEST is not set
+CONFIG_CRYPTO_ANSI_CPRNG=y
diff --git a/arch/xtensa/configs/iss_defconfig b/arch/xtensa/configs/iss_defconfig
new file mode 100644
index 000000000..32ce8fb06
--- /dev/null
+++ b/arch/xtensa/configs/iss_defconfig
@@ -0,0 +1,31 @@
+CONFIG_SYSVIPC=y
+CONFIG_LOG_BUF_SHIFT=14
+CONFIG_EXPERT=y
+# CONFIG_PCI is not set
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="console=ttyS0,38400 eth0=tuntap,,tap0 ip=192.168.168.5:192.168.168.1 root=nfs nfsroot=192.168.168.1:/opt/montavista/pro/devkit/xtensa/linux_be/target memmap=128M@0"
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+# CONFIG_IPV6 is not set
+# CONFIG_STANDALONE is not set
+# CONFIG_INPUT_MOUSEDEV is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_SERIO is not set
+CONFIG_WATCHDOG=y
+CONFIG_WATCHDOG_NOWAYOUT=y
+CONFIG_SOFT_WATCHDOG=y
+# CONFIG_VGA_CONSOLE is not set
+# CONFIG_DNOTIFY is not set
+CONFIG_PROC_KCORE=y
+CONFIG_TMPFS=y
+# CONFIG_FRAME_POINTER is not set
+CONFIG_DETECT_HUNG_TASK=y
+CONFIG_CRYPTO_ANSI_CPRNG=y
diff --git a/arch/xtensa/configs/nommu_kc705_defconfig b/arch/xtensa/configs/nommu_kc705_defconfig
new file mode 100644
index 000000000..8263da9e0
--- /dev/null
+++ b/arch/xtensa/configs/nommu_kc705_defconfig
@@ -0,0 +1,126 @@
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_FHANDLE=y
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_IRQ_TIME_ACCOUNTING=y
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_CGROUP_DEBUG=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_DEVICE=y
+CONFIG_CPUSETS=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_MEMCG=y
+CONFIG_NAMESPACES=y
+CONFIG_SCHED_AUTOGROUP=y
+CONFIG_RELAY=y
+CONFIG_BLK_DEV_INITRD=y
+# CONFIG_RD_BZIP2 is not set
+# CONFIG_RD_LZMA is not set
+# CONFIG_RD_XZ is not set
+# CONFIG_RD_LZO is not set
+# CONFIG_RD_LZ4 is not set
+CONFIG_EXPERT=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_PERF_EVENTS=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_XTENSA_VARIANT_CUSTOM=y
+CONFIG_XTENSA_VARIANT_CUSTOM_NAME="de212"
+# CONFIG_XTENSA_VARIANT_MMU is not set
+CONFIG_XTENSA_UNALIGNED_USER=y
+CONFIG_PREEMPT=y
+CONFIG_MEMMAP_CACHEATTR=0xfff2442f
+# CONFIG_PCI is not set
+CONFIG_XTENSA_PLATFORM_XTFPGA=y
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="earlycon=uart8250,mmio32native,0x9d050020,115200n8 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw debug memmap=256M@0x60000000"
+CONFIG_USE_OF=y
+CONFIG_BUILTIN_DTB_SOURCE="kc705_nommu"
+CONFIG_BINFMT_FLAT=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+# CONFIG_IPV6 is not set
+CONFIG_NETFILTER=y
+# CONFIG_WIRELESS is not set
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_STANDALONE is not set
+CONFIG_MTD=y
+CONFIG_MTD_CFI=y
+CONFIG_MTD_JEDECPROBE=y
+CONFIG_MTD_CFI_INTELEXT=y
+CONFIG_MTD_CFI_AMDSTD=y
+CONFIG_MTD_CFI_STAA=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_SCSI=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_NETDEVICES=y
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+# CONFIG_NET_VENDOR_STMICRO is not set
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+CONFIG_MARVELL_PHY=y
+# CONFIG_WLAN is not set
+# CONFIG_INPUT_MOUSEDEV is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_SERIO is not set
+CONFIG_SERIAL_8250=y
+# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_HW_RANDOM=y
+# CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+CONFIG_WATCHDOG_NOWAYOUT=y
+CONFIG_SOFT_WATCHDOG=y
+# CONFIG_VGA_CONSOLE is not set
+# CONFIG_USB_SUPPORT is not set
+CONFIG_EXT3_FS=y
+CONFIG_EXT4_FS=y
+CONFIG_FANOTIFY=y
+CONFIG_VFAT_FS=y
+CONFIG_JFFS2_FS=y
+CONFIG_NFS_FS=y
+CONFIG_NFS_V4=y
+CONFIG_NFS_SWAP=y
+CONFIG_ROOT_NFS=y
+CONFIG_SUNRPC_DEBUG=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_PRINTK_TIME=y
+CONFIG_DYNAMIC_DEBUG=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
+# CONFIG_FRAME_POINTER is not set
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_DEBUG_VM=y
+CONFIG_DEBUG_NOMMU_REGIONS=y
+CONFIG_DEBUG_SHIRQ=y
+CONFIG_LOCKUP_DETECTOR=y
+CONFIG_SCHEDSTATS=y
+CONFIG_TIMER_STATS=y
+CONFIG_DEBUG_RT_MUTEXES=y
+CONFIG_DEBUG_SPINLOCK=y
+CONFIG_DEBUG_MUTEXES=y
+CONFIG_DEBUG_ATOMIC_SLEEP=y
+CONFIG_STACKTRACE=y
+CONFIG_RCU_TRACE=y
+# CONFIG_FTRACE is not set
+# CONFIG_LD_NO_RELAX is not set
+# CONFIG_CRYPTO_ECHAINIV is not set
+CONFIG_CRYPTO_ANSI_CPRNG=y
diff --git a/arch/xtensa/configs/smp_lx200_defconfig b/arch/xtensa/configs/smp_lx200_defconfig
new file mode 100644
index 000000000..7bdffa3a6
--- /dev/null
+++ b/arch/xtensa/configs/smp_lx200_defconfig
@@ -0,0 +1,129 @@
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_FHANDLE=y
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_IRQ_TIME_ACCOUNTING=y
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_CGROUP_DEBUG=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_DEVICE=y
+CONFIG_CPUSETS=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_MEMCG=y
+CONFIG_NAMESPACES=y
+CONFIG_SCHED_AUTOGROUP=y
+CONFIG_RELAY=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_EXPERT=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_PROFILING=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_XTENSA_VARIANT_CUSTOM=y
+CONFIG_XTENSA_VARIANT_CUSTOM_NAME="test_mmuhifi_c3"
+CONFIG_XTENSA_UNALIGNED_USER=y
+CONFIG_PREEMPT=y
+CONFIG_HAVE_SMP=y
+CONFIG_SMP=y
+CONFIG_HOTPLUG_CPU=y
+# CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX is not set
+# CONFIG_PCI is not set
+CONFIG_XTENSA_PLATFORM_XTFPGA=y
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="earlycon=uart8250,mmio32native,0xfd050020,115200n8 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw debug memmap=96M@0"
+CONFIG_USE_OF=y
+CONFIG_BUILTIN_DTB_SOURCE="lx200mx"
+# CONFIG_COMPACTION is not set
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+# CONFIG_IPV6 is not set
+CONFIG_NETFILTER=y
+# CONFIG_WIRELESS is not set
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_STANDALONE is not set
+CONFIG_MTD=y
+CONFIG_MTD_CFI=y
+CONFIG_MTD_JEDECPROBE=y
+CONFIG_MTD_CFI_INTELEXT=y
+CONFIG_MTD_CFI_AMDSTD=y
+CONFIG_MTD_CFI_STAA=y
+CONFIG_MTD_PHYSMAP_OF=y
+CONFIG_MTD_UBI=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_SCSI=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_NETDEVICES=y
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_SAMSUNG is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+# CONFIG_NET_VENDOR_SMSC is not set
+# CONFIG_NET_VENDOR_STMICRO is not set
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+CONFIG_MARVELL_PHY=y
+# CONFIG_WLAN is not set
+# CONFIG_INPUT_MOUSEDEV is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_SERIO is not set
+CONFIG_SERIAL_8250=y
+# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_HW_RANDOM=y
+# CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+CONFIG_WATCHDOG_NOWAYOUT=y
+CONFIG_SOFT_WATCHDOG=y
+# CONFIG_VGA_CONSOLE is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT3_FS=y
+CONFIG_EXT4_FS=y
+CONFIG_FANOTIFY=y
+CONFIG_VFAT_FS=y
+CONFIG_PROC_KCORE=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_UBIFS_FS=y
+CONFIG_NFS_FS=y
+CONFIG_NFS_V4=y
+CONFIG_NFS_SWAP=y
+CONFIG_ROOT_NFS=y
+CONFIG_SUNRPC_DEBUG=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_PRINTK_TIME=y
+CONFIG_DYNAMIC_DEBUG=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_DEBUG_VM=y
+CONFIG_LOCKUP_DETECTOR=y
+CONFIG_SCHEDSTATS=y
+CONFIG_TIMER_STATS=y
+CONFIG_DEBUG_RT_MUTEXES=y
+CONFIG_DEBUG_SPINLOCK=y
+CONFIG_DEBUG_MUTEXES=y
+CONFIG_DEBUG_ATOMIC_SLEEP=y
+CONFIG_STACKTRACE=y
+CONFIG_RCU_TRACE=y
+# CONFIG_FTRACE is not set
+CONFIG_LD_NO_RELAX=y
+# CONFIG_S32C1I_SELFTEST is not set
+CONFIG_CRYPTO_ANSI_CPRNG=y
diff --git a/arch/xtensa/configs/virt_defconfig b/arch/xtensa/configs/virt_defconfig
new file mode 100644
index 000000000..98acb7191
--- /dev/null
+++ b/arch/xtensa/configs/virt_defconfig
@@ -0,0 +1,111 @@
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_PREEMPT=y
+CONFIG_IRQ_TIME_ACCOUNTING=y
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_MEMCG=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_DEVICE=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_CGROUP_DEBUG=y
+CONFIG_NAMESPACES=y
+CONFIG_SCHED_AUTOGROUP=y
+CONFIG_RELAY=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_EXPERT=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_PERF_EVENTS=y
+CONFIG_XTENSA_VARIANT_DC233C=y
+CONFIG_XTENSA_UNALIGNED_USER=y
+CONFIG_XTENSA_KSEG_512M=y
+CONFIG_HIGHMEM=y
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw debug memmap=0x80000000@0"
+CONFIG_USE_OF=y
+CONFIG_BUILTIN_DTB_SOURCE="virt"
+# CONFIG_PARSE_BOOTPARAM is not set
+CONFIG_JUMP_LABEL=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+# CONFIG_COMPACTION is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+# CONFIG_IPV6 is not set
+CONFIG_NETFILTER=y
+# CONFIG_WIRELESS is not set
+CONFIG_PCI=y
+CONFIG_PCI_HOST_GENERIC=y
+CONFIG_UEVENT_HELPER=y
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_STANDALONE is not set
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_VIRTIO_BLK=y
+CONFIG_SCSI=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_NETDEVICES=y
+CONFIG_VIRTIO_NET=y
+# CONFIG_ETHERNET is not set
+# CONFIG_WLAN is not set
+CONFIG_INPUT_MOUSEDEV=y
+CONFIG_INPUT_EVDEV=y
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_LEGACY_PTYS is not set
+CONFIG_HW_RANDOM=y
+CONFIG_HW_RANDOM_VIRTIO=y
+# CONFIG_HWMON is not set
+CONFIG_DRM=y
+CONFIG_DRM_VGEM=y
+CONFIG_DRM_VIRTIO_GPU=y
+CONFIG_FB_MODE_HELPERS=y
+# CONFIG_VGA_CONSOLE is not set
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_LOGO=y
+# CONFIG_USB_SUPPORT is not set
+CONFIG_VIRTIO_PCI=y
+CONFIG_VIRTIO_INPUT=y
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT3_FS=y
+CONFIG_FANOTIFY=y
+CONFIG_VFAT_FS=y
+CONFIG_PROC_KCORE=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_NFS_FS=y
+CONFIG_NFS_V4=y
+CONFIG_NFS_SWAP=y
+CONFIG_ROOT_NFS=y
+CONFIG_SUNRPC_DEBUG=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_CRYPTO_ECHAINIV=y
+CONFIG_CRYPTO_DEFLATE=y
+CONFIG_CRYPTO_LZO=y
+CONFIG_CRYPTO_ANSI_CPRNG=y
+CONFIG_CRYPTO_DEV_VIRTIO=y
+CONFIG_FONTS=y
+CONFIG_PRINTK_TIME=y
+CONFIG_DYNAMIC_DEBUG=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
+CONFIG_MAGIC_SYSRQ=y
+# CONFIG_SCHED_DEBUG is not set
+CONFIG_SCHEDSTATS=y
+CONFIG_DEBUG_RT_MUTEXES=y
+CONFIG_DEBUG_SPINLOCK=y
+CONFIG_DEBUG_MUTEXES=y
+CONFIG_DEBUG_ATOMIC_SLEEP=y
+CONFIG_STACKTRACE=y
+CONFIG_RCU_TRACE=y
+# CONFIG_FTRACE is not set
+# CONFIG_S32C1I_SELFTEST is not set
diff --git a/arch/xtensa/configs/xip_kc705_defconfig b/arch/xtensa/configs/xip_kc705_defconfig
new file mode 100644
index 000000000..1c3cebaaa
--- /dev/null
+++ b/arch/xtensa/configs/xip_kc705_defconfig
@@ -0,0 +1,117 @@
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_PREEMPT=y
+CONFIG_IRQ_TIME_ACCOUNTING=y
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_MEMCG=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_DEVICE=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_CGROUP_DEBUG=y
+CONFIG_NAMESPACES=y
+CONFIG_SCHED_AUTOGROUP=y
+CONFIG_RELAY=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_EXPERT=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_PROFILING=y
+CONFIG_XTENSA_VARIANT_DC233C=y
+CONFIG_XTENSA_UNALIGNED_USER=y
+CONFIG_XIP_KERNEL=y
+CONFIG_XIP_DATA_ADDR=0xd0000000
+CONFIG_KERNEL_VIRTUAL_ADDRESS=0xe6000000
+CONFIG_KERNEL_LOAD_ADDRESS=0xf6000000
+CONFIG_XTENSA_KSEG_512M=y
+CONFIG_HIGHMEM=y
+CONFIG_XTENSA_PLATFORM_XTFPGA=y
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="earlycon=uart8250,mmio32native,0xfd050020,115200n8 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw debug memmap=0x38000000@0"
+CONFIG_USE_OF=y
+CONFIG_BUILTIN_DTB_SOURCE="kc705"
+# CONFIG_PARSE_BOOTPARAM is not set
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+# CONFIG_COMPACTION is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+# CONFIG_IPV6 is not set
+CONFIG_NETFILTER=y
+# CONFIG_WIRELESS is not set
+CONFIG_UEVENT_HELPER=y
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_STANDALONE is not set
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_SCSI=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_NETDEVICES=y
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_VENDOR_AURORA is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_SAMSUNG is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+# CONFIG_NET_VENDOR_SMSC is not set
+# CONFIG_NET_VENDOR_STMICRO is not set
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+CONFIG_MARVELL_PHY=y
+# CONFIG_WLAN is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_SERIO is not set
+CONFIG_SERIAL_8250=y
+# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_OF_PLATFORM=y
+# CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+CONFIG_WATCHDOG_NOWAYOUT=y
+CONFIG_SOFT_WATCHDOG=y
+# CONFIG_VGA_CONSOLE is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT3_FS=y
+CONFIG_FANOTIFY=y
+CONFIG_VFAT_FS=y
+CONFIG_PROC_KCORE=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_NFS_FS=y
+CONFIG_NFS_V4=y
+CONFIG_NFS_SWAP=y
+CONFIG_ROOT_NFS=y
+CONFIG_SUNRPC_DEBUG=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_CRYPTO_ECHAINIV=y
+CONFIG_CRYPTO_DEFLATE=y
+CONFIG_CRYPTO_LZO=y
+CONFIG_CRYPTO_ANSI_CPRNG=y
+CONFIG_PRINTK_TIME=y
+CONFIG_DYNAMIC_DEBUG=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_DETECT_HUNG_TASK=y
+# CONFIG_SCHED_DEBUG is not set
+CONFIG_SCHEDSTATS=y
+CONFIG_DEBUG_RT_MUTEXES=y
+CONFIG_DEBUG_SPINLOCK=y
+CONFIG_DEBUG_MUTEXES=y
+CONFIG_DEBUG_ATOMIC_SLEEP=y
+CONFIG_STACKTRACE=y
+CONFIG_RCU_TRACE=y
+# CONFIG_FTRACE is not set
+# CONFIG_S32C1I_SELFTEST is not set
diff --git a/arch/xtensa/include/asm/Kbuild b/arch/xtensa/include/asm/Kbuild
new file mode 100644
index 000000000..fa07c686c
--- /dev/null
+++ b/arch/xtensa/include/asm/Kbuild
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0
+generated-y += syscall_table.h
+generic-y += extable.h
+generic-y += kvm_para.h
+generic-y += mcs_spinlock.h
+generic-y += param.h
+generic-y += parport.h
+generic-y += qrwlock.h
+generic-y += qspinlock.h
+generic-y += user.h
diff --git a/arch/xtensa/include/asm/asm-offsets.h b/arch/xtensa/include/asm/asm-offsets.h
new file mode 100644
index 000000000..d370ee36a
--- /dev/null
+++ b/arch/xtensa/include/asm/asm-offsets.h
@@ -0,0 +1 @@
+#include <generated/asm-offsets.h>
diff --git a/arch/xtensa/include/asm/asm-uaccess.h b/arch/xtensa/include/asm/asm-uaccess.h
new file mode 100644
index 000000000..7cec86913
--- /dev/null
+++ b/arch/xtensa/include/asm/asm-uaccess.h
@@ -0,0 +1,84 @@
+/*
+ * include/asm-xtensa/uaccess.h
+ *
+ * User space memory access functions
+ *
+ * These routines provide basic accessing functions to the user memory
+ * space for the kernel. This header file provides functions such as:
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_ASM_UACCESS_H
+#define _XTENSA_ASM_UACCESS_H
+
+#include <linux/errno.h>
+#include <asm/types.h>
+
+#include <asm/current.h>
+#include <asm/asm-offsets.h>
+#include <asm/processor.h>
+
+/*
+ * user_ok determines whether the access to user-space memory is allowed.
+ * See the equivalent C-macro version below for clarity.
+ *
+ * On error, user_ok branches to a label indicated by parameter
+ * <error>.  This implies that the macro falls through to the next
+ * instruction on success.
+ *
+ * Note that while this macro can be used independently, we designed
+ * in for optimal use in the access_ok macro below (i.e., we fall
+ * through on success).
+ *
+ * On Entry:
+ * 	<aa>	register containing memory address
+ * 	<as>	register containing memory size
+ * 	<at>	temp register
+ * 	<error>	label to branch to on error; implies fall-through
+ * 		macro on success
+ * On Exit:
+ * 	<aa>	preserved
+ * 	<as>	preserved
+ * 	<at>	destroyed (actually, (TASK_SIZE + 1 - size))
+ */
+	.macro	user_ok	aa, as, at, error
+	movi	\at, __XTENSA_UL_CONST(TASK_SIZE)
+	bgeu	\as, \at, \error
+	sub	\at, \at, \as
+	bgeu	\aa, \at, \error
+	.endm
+
+/*
+ * access_ok determines whether a memory access is allowed.  See the
+ * equivalent C-macro version below for clarity.
+ *
+ * On error, access_ok branches to a label indicated by parameter
+ * <error>.  This implies that the macro falls through to the next
+ * instruction on success.
+ *
+ * Note that we assume success is the common case, and we optimize the
+ * branch fall-through case on success.
+ *
+ * On Entry:
+ * 	<aa>	register containing memory address
+ * 	<as>	register containing memory size
+ * 	<at>	temp register
+ * 	<sp>
+ * 	<error>	label to branch to on error; implies fall-through
+ * 		macro on success
+ * On Exit:
+ * 	<aa>	preserved
+ * 	<as>	preserved
+ * 	<at>	destroyed
+ */
+	.macro	access_ok  aa, as, at, sp, error
+	user_ok    \aa, \as, \at, \error
+.Laccess_ok_\@:
+	.endm
+
+#endif	/* _XTENSA_ASM_UACCESS_H */
diff --git a/arch/xtensa/include/asm/asmmacro.h b/arch/xtensa/include/asm/asmmacro.h
new file mode 100644
index 000000000..e3474ca41
--- /dev/null
+++ b/arch/xtensa/include/asm/asmmacro.h
@@ -0,0 +1,339 @@
+/*
+ * include/asm-xtensa/asmmacro.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_ASMMACRO_H
+#define _XTENSA_ASMMACRO_H
+
+#include <asm/core.h>
+
+/*
+ * Some little helpers for loops. Use zero-overhead-loops
+ * where applicable and if supported by the processor.
+ *
+ * __loopi ar, at, size, inc
+ *         ar	register initialized with the start address
+ *	   at	scratch register used by macro
+ *	   size	size immediate value
+ *	   inc	increment
+ *
+ * __loops ar, as, at, inc_log2[, mask_log2][, cond][, ncond]
+ *	   ar	register initialized with the start address
+ *	   as	register initialized with the size
+ *	   at	scratch register use by macro
+ *	   inc_log2	increment [in log2]
+ *	   mask_log2	mask [in log2]
+ *	   cond		true condition (used in loop'cond')
+ *	   ncond	false condition (used in b'ncond')
+ *
+ * __loop  as
+ *	   restart loop. 'as' register must not have been modified!
+ *
+ * __endla ar, as, incr
+ *	   ar	start address (modified)
+ *	   as	scratch register used by __loops/__loopi macros or
+ *		end address used by __loopt macro
+ *	   inc	increment
+ */
+
+/*
+ * loop for given size as immediate
+ */
+
+	.macro	__loopi ar, at, size, incr
+
+#if XCHAL_HAVE_LOOPS
+		movi	\at, ((\size + \incr - 1) / (\incr))
+		loop	\at, 99f
+#else
+		addi	\at, \ar, \size
+		98:
+#endif
+
+	.endm
+
+/*
+ * loop for given size in register
+ */
+
+	.macro	__loops	ar, as, at, incr_log2, mask_log2, cond, ncond
+
+#if XCHAL_HAVE_LOOPS
+		.ifgt \incr_log2 - 1
+			addi	\at, \as, (1 << \incr_log2) - 1
+			.ifnc \mask_log2,
+				extui	\at, \at, \incr_log2, \mask_log2
+			.else
+				srli	\at, \at, \incr_log2
+			.endif
+		.endif
+		loop\cond	\at, 99f
+#else
+		.ifnc \mask_log2,
+			extui	\at, \as, \incr_log2, \mask_log2
+		.else
+			.ifnc \ncond,
+				srli	\at, \as, \incr_log2
+			.endif
+		.endif
+		.ifnc \ncond,
+			b\ncond	\at, 99f
+
+		.endif
+		.ifnc \mask_log2,
+			slli	\at, \at, \incr_log2
+			add	\at, \ar, \at
+		.else
+			add	\at, \ar, \as
+		.endif
+#endif
+		98:
+
+	.endm
+
+/*
+ * loop from ar to as
+ */
+
+	.macro	__loopt	ar, as, at, incr_log2
+
+#if XCHAL_HAVE_LOOPS
+		sub	\at, \as, \ar
+		.ifgt	\incr_log2 - 1
+			addi	\at, \at, (1 << \incr_log2) - 1
+			srli	\at, \at, \incr_log2
+		.endif
+		loop	\at, 99f
+#else
+		98:
+#endif
+
+	.endm
+
+/*
+ * restart loop. registers must be unchanged
+ */
+
+	.macro	__loop	as
+
+#if XCHAL_HAVE_LOOPS
+		loop	\as, 99f
+#else
+		98:
+#endif
+
+	.endm
+
+/*
+ * end of loop with no increment of the address.
+ */
+
+	.macro	__endl	ar, as
+#if !XCHAL_HAVE_LOOPS
+		bltu	\ar, \as, 98b
+#endif
+		99:
+	.endm
+
+/*
+ * end of loop with increment of the address.
+ */
+
+	.macro	__endla	ar, as, incr
+		addi	\ar, \ar, \incr
+		__endl	\ar \as
+	.endm
+
+/* Load or store instructions that may cause exceptions use the EX macro. */
+
+#define EX(handler)				\
+	.section __ex_table, "a";		\
+	.word	97f, handler;			\
+	.previous				\
+97:
+
+
+/*
+ * Extract unaligned word that is split between two registers w0 and w1
+ * into r regardless of machine endianness. SAR must be loaded with the
+ * starting bit of the word (see __ssa8).
+ */
+
+	.macro __src_b	r, w0, w1
+#ifdef __XTENSA_EB__
+		src	\r, \w0, \w1
+#else
+		src	\r, \w1, \w0
+#endif
+	.endm
+
+/*
+ * Load 2 lowest address bits of r into SAR for __src_b to extract unaligned
+ * word starting at r from two registers loaded from consecutive aligned
+ * addresses covering r regardless of machine endianness.
+ *
+ *      r   0   1   2   3
+ * LE SAR   0   8  16  24
+ * BE SAR  32  24  16   8
+ */
+
+	.macro __ssa8	r
+#ifdef __XTENSA_EB__
+		ssa8b	\r
+#else
+		ssa8l	\r
+#endif
+	.endm
+
+	.macro	do_nsau cnt, val, tmp, a
+#if XCHAL_HAVE_NSA
+	nsau	\cnt, \val
+#else
+	mov	\a, \val
+	movi	\cnt, 0
+	extui	\tmp, \a, 16, 16
+	bnez	\tmp, 0f
+	movi	\cnt, 16
+	slli	\a, \a, 16
+0:
+	extui	\tmp, \a, 24, 8
+	bnez	\tmp, 1f
+	addi	\cnt, \cnt, 8
+	slli	\a, \a, 8
+1:
+	movi	\tmp, __nsau_data
+	extui	\a, \a, 24, 8
+	add	\tmp, \tmp, \a
+	l8ui	\tmp, \tmp, 0
+	add	\cnt, \cnt, \tmp
+#endif /* !XCHAL_HAVE_NSA */
+	.endm
+
+	.macro	do_abs dst, src, tmp
+#if XCHAL_HAVE_ABS
+	abs	\dst, \src
+#else
+	neg	\tmp, \src
+	movgez	\tmp, \src, \src
+	mov	\dst, \tmp
+#endif
+	.endm
+
+#if defined(__XTENSA_WINDOWED_ABI__)
+
+/* Assembly instructions for windowed kernel ABI. */
+#define KABI_W
+/* Assembly instructions for call0 kernel ABI (will be ignored). */
+#define KABI_C0 #
+
+#define XTENSA_FRAME_SIZE_RESERVE	16
+#define XTENSA_SPILL_STACK_RESERVE	32
+
+#define abi_entry(frame_size) \
+	entry sp, (XTENSA_FRAME_SIZE_RESERVE + \
+		   (((frame_size) + XTENSA_STACK_ALIGNMENT - 1) & \
+		    -XTENSA_STACK_ALIGNMENT))
+#define abi_entry_default abi_entry(0)
+
+#define abi_ret(frame_size) retw
+#define abi_ret_default retw
+
+	/* direct call */
+#define abi_call call4
+	/* indirect call */
+#define abi_callx callx4
+	/* outgoing call argument registers */
+#define abi_arg0 a6
+#define abi_arg1 a7
+#define abi_arg2 a8
+#define abi_arg3 a9
+#define abi_arg4 a10
+#define abi_arg5 a11
+	/* return value */
+#define abi_rv a6
+	/* registers preserved across call */
+#define abi_saved0 a2
+#define abi_saved1 a3
+
+	/* none of the above */
+#define abi_tmp0 a4
+#define abi_tmp1 a5
+
+#elif defined(__XTENSA_CALL0_ABI__)
+
+/* Assembly instructions for windowed kernel ABI (will be ignored). */
+#define KABI_W #
+/* Assembly instructions for call0 kernel ABI. */
+#define KABI_C0
+
+#define XTENSA_SPILL_STACK_RESERVE	0
+
+#define abi_entry(frame_size) __abi_entry (frame_size)
+
+	.macro	__abi_entry frame_size
+	.ifgt \frame_size
+	addi sp, sp, -(((\frame_size) + XTENSA_STACK_ALIGNMENT - 1) & \
+		       -XTENSA_STACK_ALIGNMENT)
+	.endif
+	.endm
+
+#define abi_entry_default
+
+#define abi_ret(frame_size) __abi_ret (frame_size)
+
+	.macro	__abi_ret frame_size
+	.ifgt \frame_size
+	addi sp, sp, (((\frame_size) + XTENSA_STACK_ALIGNMENT - 1) & \
+		      -XTENSA_STACK_ALIGNMENT)
+	.endif
+	ret
+	.endm
+
+#define abi_ret_default ret
+
+	/* direct call */
+#define abi_call call0
+	/* indirect call */
+#define abi_callx callx0
+	/* outgoing call argument registers */
+#define abi_arg0 a2
+#define abi_arg1 a3
+#define abi_arg2 a4
+#define abi_arg3 a5
+#define abi_arg4 a6
+#define abi_arg5 a7
+	/* return value */
+#define abi_rv a2
+	/* registers preserved across call */
+#define abi_saved0 a12
+#define abi_saved1 a13
+
+	/* none of the above */
+#define abi_tmp0 a8
+#define abi_tmp1 a9
+
+#else
+#error Unsupported Xtensa ABI
+#endif
+
+#if defined(USER_SUPPORT_WINDOWED)
+/* Assembly instructions for windowed user ABI. */
+#define UABI_W
+/* Assembly instructions for call0 user ABI (will be ignored). */
+#define UABI_C0 #
+#else
+/* Assembly instructions for windowed user ABI (will be ignored). */
+#define UABI_W #
+/* Assembly instructions for call0 user ABI. */
+#define UABI_C0
+#endif
+
+#define __XTENSA_HANDLER	.section ".exception.text", "ax"
+
+#endif /* _XTENSA_ASMMACRO_H */
diff --git a/arch/xtensa/include/asm/atomic.h b/arch/xtensa/include/asm/atomic.h
new file mode 100644
index 000000000..52da614f9
--- /dev/null
+++ b/arch/xtensa/include/asm/atomic.h
@@ -0,0 +1,263 @@
+/*
+ * include/asm-xtensa/atomic.h
+ *
+ * Atomic operations that C can't guarantee us.  Useful for resource counting..
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2008 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_ATOMIC_H
+#define _XTENSA_ATOMIC_H
+
+#include <linux/stringify.h>
+#include <linux/types.h>
+#include <asm/processor.h>
+#include <asm/cmpxchg.h>
+#include <asm/barrier.h>
+
+/*
+ * This Xtensa implementation assumes that the right mechanism
+ * for exclusion is for locking interrupts to level EXCM_LEVEL.
+ *
+ * Locking interrupts looks like this:
+ *
+ *    rsil a14, TOPLEVEL
+ *    <code>
+ *    wsr  a14, PS
+ *    rsync
+ *
+ * Note that a14 is used here because the register allocation
+ * done by the compiler is not guaranteed and a window overflow
+ * may not occur between the rsil and wsr instructions. By using
+ * a14 in the rsil, the machine is guaranteed to be in a state
+ * where no register reference will cause an overflow.
+ */
+
+/**
+ * atomic_read - read atomic variable
+ * @v: pointer of type atomic_t
+ *
+ * Atomically reads the value of @v.
+ */
+#define arch_atomic_read(v)		READ_ONCE((v)->counter)
+
+/**
+ * atomic_set - set atomic variable
+ * @v: pointer of type atomic_t
+ * @i: required value
+ *
+ * Atomically sets the value of @v to @i.
+ */
+#define arch_atomic_set(v,i)		WRITE_ONCE((v)->counter, (i))
+
+#if XCHAL_HAVE_EXCLUSIVE
+#define ATOMIC_OP(op)							\
+static inline void arch_atomic_##op(int i, atomic_t *v)			\
+{									\
+	unsigned long tmp;						\
+	int result;							\
+									\
+	__asm__ __volatile__(						\
+			"1:     l32ex   %[tmp], %[addr]\n"		\
+			"       " #op " %[result], %[tmp], %[i]\n"	\
+			"       s32ex   %[result], %[addr]\n"		\
+			"       getex   %[result]\n"			\
+			"       beqz    %[result], 1b\n"		\
+			: [result] "=&a" (result), [tmp] "=&a" (tmp)	\
+			: [i] "a" (i), [addr] "a" (v)			\
+			: "memory"					\
+			);						\
+}									\
+
+#define ATOMIC_OP_RETURN(op)						\
+static inline int arch_atomic_##op##_return(int i, atomic_t *v)		\
+{									\
+	unsigned long tmp;						\
+	int result;							\
+									\
+	__asm__ __volatile__(						\
+			"1:     l32ex   %[tmp], %[addr]\n"		\
+			"       " #op " %[result], %[tmp], %[i]\n"	\
+			"       s32ex   %[result], %[addr]\n"		\
+			"       getex   %[result]\n"			\
+			"       beqz    %[result], 1b\n"		\
+			"       " #op " %[result], %[tmp], %[i]\n"	\
+			: [result] "=&a" (result), [tmp] "=&a" (tmp)	\
+			: [i] "a" (i), [addr] "a" (v)			\
+			: "memory"					\
+			);						\
+									\
+	return result;							\
+}
+
+#define ATOMIC_FETCH_OP(op)						\
+static inline int arch_atomic_fetch_##op(int i, atomic_t *v)		\
+{									\
+	unsigned long tmp;						\
+	int result;							\
+									\
+	__asm__ __volatile__(						\
+			"1:     l32ex   %[tmp], %[addr]\n"		\
+			"       " #op " %[result], %[tmp], %[i]\n"	\
+			"       s32ex   %[result], %[addr]\n"		\
+			"       getex   %[result]\n"			\
+			"       beqz    %[result], 1b\n"		\
+			: [result] "=&a" (result), [tmp] "=&a" (tmp)	\
+			: [i] "a" (i), [addr] "a" (v)			\
+			: "memory"					\
+			);						\
+									\
+	return tmp;							\
+}
+
+#elif XCHAL_HAVE_S32C1I
+#define ATOMIC_OP(op)							\
+static inline void arch_atomic_##op(int i, atomic_t * v)		\
+{									\
+	unsigned long tmp;						\
+	int result;							\
+									\
+	__asm__ __volatile__(						\
+			"1:     l32i    %[tmp], %[mem]\n"		\
+			"       wsr     %[tmp], scompare1\n"		\
+			"       " #op " %[result], %[tmp], %[i]\n"	\
+			"       s32c1i  %[result], %[mem]\n"		\
+			"       bne     %[result], %[tmp], 1b\n"	\
+			: [result] "=&a" (result), [tmp] "=&a" (tmp),	\
+			  [mem] "+m" (*v)				\
+			: [i] "a" (i)					\
+			: "memory"					\
+			);						\
+}									\
+
+#define ATOMIC_OP_RETURN(op)						\
+static inline int arch_atomic_##op##_return(int i, atomic_t * v)	\
+{									\
+	unsigned long tmp;						\
+	int result;							\
+									\
+	__asm__ __volatile__(						\
+			"1:     l32i    %[tmp], %[mem]\n"		\
+			"       wsr     %[tmp], scompare1\n"		\
+			"       " #op " %[result], %[tmp], %[i]\n"	\
+			"       s32c1i  %[result], %[mem]\n"		\
+			"       bne     %[result], %[tmp], 1b\n"	\
+			"       " #op " %[result], %[result], %[i]\n"	\
+			: [result] "=&a" (result), [tmp] "=&a" (tmp),	\
+			  [mem] "+m" (*v)				\
+			: [i] "a" (i)					\
+			: "memory"					\
+			);						\
+									\
+	return result;							\
+}
+
+#define ATOMIC_FETCH_OP(op)						\
+static inline int arch_atomic_fetch_##op(int i, atomic_t * v)		\
+{									\
+	unsigned long tmp;						\
+	int result;							\
+									\
+	__asm__ __volatile__(						\
+			"1:     l32i    %[tmp], %[mem]\n"		\
+			"       wsr     %[tmp], scompare1\n"		\
+			"       " #op " %[result], %[tmp], %[i]\n"	\
+			"       s32c1i  %[result], %[mem]\n"		\
+			"       bne     %[result], %[tmp], 1b\n"	\
+			: [result] "=&a" (result), [tmp] "=&a" (tmp),	\
+			  [mem] "+m" (*v)				\
+			: [i] "a" (i)					\
+			: "memory"					\
+			);						\
+									\
+	return result;							\
+}
+
+#else /* XCHAL_HAVE_S32C1I */
+
+#define ATOMIC_OP(op)							\
+static inline void arch_atomic_##op(int i, atomic_t * v)		\
+{									\
+	unsigned int vval;						\
+									\
+	__asm__ __volatile__(						\
+			"       rsil    a14, "__stringify(TOPLEVEL)"\n"	\
+			"       l32i    %[result], %[mem]\n"		\
+			"       " #op " %[result], %[result], %[i]\n"	\
+			"       s32i    %[result], %[mem]\n"		\
+			"       wsr     a14, ps\n"			\
+			"       rsync\n"				\
+			: [result] "=&a" (vval), [mem] "+m" (*v)	\
+			: [i] "a" (i)					\
+			: "a14", "memory"				\
+			);						\
+}									\
+
+#define ATOMIC_OP_RETURN(op)						\
+static inline int arch_atomic_##op##_return(int i, atomic_t * v)	\
+{									\
+	unsigned int vval;						\
+									\
+	__asm__ __volatile__(						\
+			"       rsil    a14,"__stringify(TOPLEVEL)"\n"	\
+			"       l32i    %[result], %[mem]\n"		\
+			"       " #op " %[result], %[result], %[i]\n"	\
+			"       s32i    %[result], %[mem]\n"		\
+			"       wsr     a14, ps\n"			\
+			"       rsync\n"				\
+			: [result] "=&a" (vval), [mem] "+m" (*v)	\
+			: [i] "a" (i)					\
+			: "a14", "memory"				\
+			);						\
+									\
+	return vval;							\
+}
+
+#define ATOMIC_FETCH_OP(op)						\
+static inline int arch_atomic_fetch_##op(int i, atomic_t * v)		\
+{									\
+	unsigned int tmp, vval;						\
+									\
+	__asm__ __volatile__(						\
+			"       rsil    a14,"__stringify(TOPLEVEL)"\n"	\
+			"       l32i    %[result], %[mem]\n"		\
+			"       " #op " %[tmp], %[result], %[i]\n"	\
+			"       s32i    %[tmp], %[mem]\n"		\
+			"       wsr     a14, ps\n"			\
+			"       rsync\n"				\
+			: [result] "=&a" (vval), [tmp] "=&a" (tmp),	\
+			  [mem] "+m" (*v)				\
+			: [i] "a" (i)					\
+			: "a14", "memory"				\
+			);						\
+									\
+	return vval;							\
+}
+
+#endif /* XCHAL_HAVE_S32C1I */
+
+#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op) ATOMIC_OP_RETURN(op)
+
+ATOMIC_OPS(add)
+ATOMIC_OPS(sub)
+
+#undef ATOMIC_OPS
+#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)
+
+ATOMIC_OPS(and)
+ATOMIC_OPS(or)
+ATOMIC_OPS(xor)
+
+#undef ATOMIC_OPS
+#undef ATOMIC_FETCH_OP
+#undef ATOMIC_OP_RETURN
+#undef ATOMIC_OP
+
+#define arch_atomic_cmpxchg(v, o, n) ((int)arch_cmpxchg(&((v)->counter), (o), (n)))
+#define arch_atomic_xchg(v, new) (arch_xchg(&((v)->counter), new))
+
+#endif /* _XTENSA_ATOMIC_H */
diff --git a/arch/xtensa/include/asm/barrier.h b/arch/xtensa/include/asm/barrier.h
new file mode 100644
index 000000000..898ea397e
--- /dev/null
+++ b/arch/xtensa/include/asm/barrier.h
@@ -0,0 +1,31 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2012 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_SYSTEM_H
+#define _XTENSA_SYSTEM_H
+
+#include <asm/core.h>
+
+#define __mb()  ({ __asm__ __volatile__("memw" : : : "memory"); })
+#define __rmb() barrier()
+#define __wmb() __mb()
+
+#ifdef CONFIG_SMP
+#define __smp_mb() __mb()
+#define __smp_rmb() __rmb()
+#define __smp_wmb() __wmb()
+#endif
+
+#if XCHAL_HAVE_S32C1I
+#define __smp_mb__before_atomic()		barrier()
+#define __smp_mb__after_atomic()		barrier()
+#endif
+
+#include <asm-generic/barrier.h>
+
+#endif /* _XTENSA_SYSTEM_H */
diff --git a/arch/xtensa/include/asm/bitops.h b/arch/xtensa/include/asm/bitops.h
new file mode 100644
index 000000000..e02ec5833
--- /dev/null
+++ b/arch/xtensa/include/asm/bitops.h
@@ -0,0 +1,218 @@
+/*
+ * include/asm-xtensa/bitops.h
+ *
+ * Atomic operations that C can't guarantee us.Useful for resource counting etc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2007 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_BITOPS_H
+#define _XTENSA_BITOPS_H
+
+#ifndef _LINUX_BITOPS_H
+#error only <linux/bitops.h> can be included directly
+#endif
+
+#include <asm/processor.h>
+#include <asm/byteorder.h>
+#include <asm/barrier.h>
+
+#include <asm-generic/bitops/non-atomic.h>
+
+#if XCHAL_HAVE_NSA
+
+static inline unsigned long __cntlz (unsigned long x)
+{
+	int lz;
+	asm ("nsau %0, %1" : "=r" (lz) : "r" (x));
+	return lz;
+}
+
+/*
+ * ffz: Find first zero in word. Undefined if no zero exists.
+ * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
+ */
+
+static inline int ffz(unsigned long x)
+{
+	return 31 - __cntlz(~x & -~x);
+}
+
+/*
+ * __ffs: Find first bit set in word. Return 0 for bit 0
+ */
+
+static inline unsigned long __ffs(unsigned long x)
+{
+	return 31 - __cntlz(x & -x);
+}
+
+/*
+ * ffs: Find first bit set in word. This is defined the same way as
+ * the libc and compiler builtin ffs routines, therefore
+ * differs in spirit from the above ffz (man ffs).
+ */
+
+static inline int ffs(unsigned long x)
+{
+	return 32 - __cntlz(x & -x);
+}
+
+/*
+ * fls: Find last (most-significant) bit set in word.
+ * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
+ */
+
+static inline int fls (unsigned int x)
+{
+	return 32 - __cntlz(x);
+}
+
+/**
+ * __fls - find last (most-significant) set bit in a long word
+ * @word: the word to search
+ *
+ * Undefined if no set bit exists, so code should check against 0 first.
+ */
+static inline unsigned long __fls(unsigned long word)
+{
+	return 31 - __cntlz(word);
+}
+#else
+
+/* Use the generic implementation if we don't have the nsa/nsau instructions. */
+
+# include <asm-generic/bitops/ffs.h>
+# include <asm-generic/bitops/__ffs.h>
+# include <asm-generic/bitops/ffz.h>
+# include <asm-generic/bitops/fls.h>
+# include <asm-generic/bitops/__fls.h>
+
+#endif
+
+#include <asm-generic/bitops/fls64.h>
+
+#if XCHAL_HAVE_EXCLUSIVE
+
+#define BIT_OP(op, insn, inv)						\
+static inline void arch_##op##_bit(unsigned int bit, volatile unsigned long *p)\
+{									\
+	unsigned long tmp;						\
+	unsigned long mask = 1UL << (bit & 31);				\
+									\
+	p += bit >> 5;							\
+									\
+	__asm__ __volatile__(						\
+			"1:     l32ex   %[tmp], %[addr]\n"		\
+			"      "insn"   %[tmp], %[tmp], %[mask]\n"	\
+			"       s32ex   %[tmp], %[addr]\n"		\
+			"       getex   %[tmp]\n"			\
+			"       beqz    %[tmp], 1b\n"			\
+			: [tmp] "=&a" (tmp)				\
+			: [mask] "a" (inv mask), [addr] "a" (p)		\
+			: "memory");					\
+}
+
+#define TEST_AND_BIT_OP(op, insn, inv)					\
+static inline int							\
+arch_test_and_##op##_bit(unsigned int bit, volatile unsigned long *p)	\
+{									\
+	unsigned long tmp, value;					\
+	unsigned long mask = 1UL << (bit & 31);				\
+									\
+	p += bit >> 5;							\
+									\
+	__asm__ __volatile__(						\
+			"1:     l32ex   %[value], %[addr]\n"		\
+			"      "insn"   %[tmp], %[value], %[mask]\n"	\
+			"       s32ex   %[tmp], %[addr]\n"		\
+			"       getex   %[tmp]\n"			\
+			"       beqz    %[tmp], 1b\n"			\
+			: [tmp] "=&a" (tmp), [value] "=&a" (value)	\
+			: [mask] "a" (inv mask), [addr] "a" (p)		\
+			: "memory");					\
+									\
+	return value & mask;						\
+}
+
+#elif XCHAL_HAVE_S32C1I
+
+#define BIT_OP(op, insn, inv)						\
+static inline void arch_##op##_bit(unsigned int bit, volatile unsigned long *p)\
+{									\
+	unsigned long tmp, value;					\
+	unsigned long mask = 1UL << (bit & 31);				\
+									\
+	p += bit >> 5;							\
+									\
+	__asm__ __volatile__(						\
+			"1:     l32i    %[value], %[mem]\n"		\
+			"       wsr     %[value], scompare1\n"		\
+			"      "insn"   %[tmp], %[value], %[mask]\n"	\
+			"       s32c1i  %[tmp], %[mem]\n"		\
+			"       bne     %[tmp], %[value], 1b\n"		\
+			: [tmp] "=&a" (tmp), [value] "=&a" (value),	\
+			  [mem] "+m" (*p)				\
+			: [mask] "a" (inv mask)				\
+			: "memory");					\
+}
+
+#define TEST_AND_BIT_OP(op, insn, inv)					\
+static inline int							\
+arch_test_and_##op##_bit(unsigned int bit, volatile unsigned long *p)	\
+{									\
+	unsigned long tmp, value;					\
+	unsigned long mask = 1UL << (bit & 31);				\
+									\
+	p += bit >> 5;							\
+									\
+	__asm__ __volatile__(						\
+			"1:     l32i    %[value], %[mem]\n"		\
+			"       wsr     %[value], scompare1\n"		\
+			"      "insn"   %[tmp], %[value], %[mask]\n"	\
+			"       s32c1i  %[tmp], %[mem]\n"		\
+			"       bne     %[tmp], %[value], 1b\n"		\
+			: [tmp] "=&a" (tmp), [value] "=&a" (value),	\
+			  [mem] "+m" (*p)				\
+			: [mask] "a" (inv mask)				\
+			: "memory");					\
+									\
+	return tmp & mask;						\
+}
+
+#else
+
+#define BIT_OP(op, insn, inv)
+#define TEST_AND_BIT_OP(op, insn, inv)
+
+#include <asm-generic/bitops/atomic.h>
+
+#endif /* XCHAL_HAVE_S32C1I */
+
+#define BIT_OPS(op, insn, inv)		\
+	BIT_OP(op, insn, inv)		\
+	TEST_AND_BIT_OP(op, insn, inv)
+
+BIT_OPS(set, "or", )
+BIT_OPS(clear, "and", ~)
+BIT_OPS(change, "xor", )
+
+#undef BIT_OPS
+#undef BIT_OP
+#undef TEST_AND_BIT_OP
+
+#include <asm-generic/bitops/instrumented-atomic.h>
+
+#include <asm-generic/bitops/le.h>
+
+#include <asm-generic/bitops/ext2-atomic-setbit.h>
+
+#include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
+#include <asm-generic/bitops/sched.h>
+
+#endif	/* _XTENSA_BITOPS_H */
diff --git a/arch/xtensa/include/asm/bootparam.h b/arch/xtensa/include/asm/bootparam.h
new file mode 100644
index 000000000..6333bd1eb
--- /dev/null
+++ b/arch/xtensa/include/asm/bootparam.h
@@ -0,0 +1,50 @@
+/*
+ * include/asm-xtensa/bootparam.h
+ *
+ * Definition of the Linux/Xtensa boot parameter structure
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005  Tensilica Inc.
+ *
+ * (Concept borrowed from the 68K port)
+ */
+
+#ifndef _XTENSA_BOOTPARAM_H
+#define _XTENSA_BOOTPARAM_H
+
+#define BP_VERSION 0x0001
+
+#define BP_TAG_COMMAND_LINE	0x1001	/* command line (0-terminated string)*/
+#define BP_TAG_INITRD		0x1002	/* ramdisk addr and size (bp_meminfo) */
+#define BP_TAG_MEMORY		0x1003	/* memory addr and size (bp_meminfo) */
+#define BP_TAG_SERIAL_BAUDRATE	0x1004	/* baud rate of current console. */
+#define BP_TAG_SERIAL_PORT	0x1005	/* serial device of current console */
+#define BP_TAG_FDT		0x1006	/* flat device tree addr */
+
+#define BP_TAG_FIRST		0x7B0B  /* first tag with a version number */
+#define BP_TAG_LAST 		0x7E0B	/* last tag */
+
+#ifndef __ASSEMBLY__
+
+/* All records are aligned to 4 bytes */
+
+typedef struct bp_tag {
+	unsigned short id;	/* tag id */
+	unsigned short size;	/* size of this record excluding the structure*/
+	unsigned long data[];	/* data */
+} bp_tag_t;
+
+struct bp_meminfo {
+	unsigned long type;
+	unsigned long start;
+	unsigned long end;
+};
+
+#define MEMORY_TYPE_CONVENTIONAL	0x1000
+#define MEMORY_TYPE_NONE		0x2000
+
+#endif
+#endif
diff --git a/arch/xtensa/include/asm/cache.h b/arch/xtensa/include/asm/cache.h
new file mode 100644
index 000000000..54e147ac2
--- /dev/null
+++ b/arch/xtensa/include/asm/cache.h
@@ -0,0 +1,40 @@
+/*
+ * include/asm-xtensa/cache.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_CACHE_H
+#define _XTENSA_CACHE_H
+
+#include <asm/core.h>
+
+#define L1_CACHE_SHIFT	XCHAL_DCACHE_LINEWIDTH
+#define L1_CACHE_BYTES	XCHAL_DCACHE_LINESIZE
+#define SMP_CACHE_BYTES	L1_CACHE_BYTES
+
+#define DCACHE_WAY_SIZE	(XCHAL_DCACHE_SIZE/XCHAL_DCACHE_WAYS)
+#define ICACHE_WAY_SIZE	(XCHAL_ICACHE_SIZE/XCHAL_ICACHE_WAYS)
+#define DCACHE_WAY_SHIFT (XCHAL_DCACHE_SETWIDTH + XCHAL_DCACHE_LINEWIDTH)
+#define ICACHE_WAY_SHIFT (XCHAL_ICACHE_SETWIDTH + XCHAL_ICACHE_LINEWIDTH)
+
+/* Maximum cache size per way. */
+#if DCACHE_WAY_SIZE >= ICACHE_WAY_SIZE
+# define CACHE_WAY_SIZE DCACHE_WAY_SIZE
+#else
+# define CACHE_WAY_SIZE ICACHE_WAY_SIZE
+#endif
+
+#define ARCH_DMA_MINALIGN	L1_CACHE_BYTES
+
+/*
+ * R/O after init is actually writable, it cannot go to .rodata
+ * according to vmlinux linker script.
+ */
+#define __ro_after_init __read_mostly
+
+#endif	/* _XTENSA_CACHE_H */
diff --git a/arch/xtensa/include/asm/cacheasm.h b/arch/xtensa/include/asm/cacheasm.h
new file mode 100644
index 000000000..34545ecfd
--- /dev/null
+++ b/arch/xtensa/include/asm/cacheasm.h
@@ -0,0 +1,214 @@
+/*
+ * include/asm-xtensa/cacheasm.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Tensilica Inc.
+ */
+
+#include <asm/cache.h>
+#include <asm/asmmacro.h>
+#include <linux/stringify.h>
+
+/*
+ * Define cache functions as macros here so that they can be used
+ * by the kernel and boot loader. We should consider moving them to a
+ * library that can be linked by both.
+ *
+ * Locking
+ *
+ *   ___unlock_dcache_all
+ *   ___unlock_icache_all
+ *
+ * Flush and invaldating
+ *
+ *   ___flush_invalidate_dcache_{all|range|page}
+ *   ___flush_dcache_{all|range|page}
+ *   ___invalidate_dcache_{all|range|page}
+ *   ___invalidate_icache_{all|range|page}
+ *
+ */
+
+
+	.macro	__loop_cache_unroll ar at insn size line_width max_immed
+
+	.if	(1 << (\line_width)) > (\max_immed)
+	.set	_reps, 1
+	.elseif	(2 << (\line_width)) > (\max_immed)
+	.set	_reps, 2
+	.else
+	.set	_reps, 4
+	.endif
+
+	__loopi	\ar, \at, \size, (_reps << (\line_width))
+	.set	_index, 0
+	.rep	_reps
+	\insn	\ar, _index << (\line_width)
+	.set	_index, _index + 1
+	.endr
+	__endla	\ar, \at, _reps << (\line_width)
+
+	.endm
+
+
+	.macro	__loop_cache_all ar at insn size line_width max_immed
+
+	movi	\ar, 0
+	__loop_cache_unroll \ar, \at, \insn, \size, \line_width, \max_immed
+
+	.endm
+
+
+	.macro	__loop_cache_range ar as at insn line_width
+
+	extui	\at, \ar, 0, \line_width
+	add	\as, \as, \at
+
+	__loops	\ar, \as, \at, \line_width
+	\insn	\ar, 0
+	__endla	\ar, \at, (1 << (\line_width))
+
+	.endm
+
+
+	.macro	__loop_cache_page ar at insn line_width max_immed
+
+	__loop_cache_unroll \ar, \at, \insn, PAGE_SIZE, \line_width, \max_immed
+
+	.endm
+
+
+	.macro	___unlock_dcache_all ar at
+
+#if XCHAL_DCACHE_LINE_LOCKABLE && XCHAL_DCACHE_SIZE
+	__loop_cache_all \ar \at diu XCHAL_DCACHE_SIZE \
+		XCHAL_DCACHE_LINEWIDTH 240
+#endif
+
+	.endm
+
+
+	.macro	___unlock_icache_all ar at
+
+#if XCHAL_ICACHE_LINE_LOCKABLE && XCHAL_ICACHE_SIZE
+	__loop_cache_all \ar \at iiu XCHAL_ICACHE_SIZE \
+		XCHAL_ICACHE_LINEWIDTH 240
+#endif
+
+	.endm
+
+
+	.macro	___flush_invalidate_dcache_all ar at
+
+#if XCHAL_DCACHE_SIZE
+	__loop_cache_all \ar \at diwbi XCHAL_DCACHE_SIZE \
+		XCHAL_DCACHE_LINEWIDTH 240
+#endif
+
+	.endm
+
+
+	.macro	___flush_dcache_all ar at
+
+#if XCHAL_DCACHE_SIZE
+	__loop_cache_all \ar \at diwb XCHAL_DCACHE_SIZE \
+		XCHAL_DCACHE_LINEWIDTH 240
+#endif
+
+	.endm
+
+
+	.macro	___invalidate_dcache_all ar at
+
+#if XCHAL_DCACHE_SIZE
+	__loop_cache_all \ar \at dii XCHAL_DCACHE_SIZE \
+			 XCHAL_DCACHE_LINEWIDTH 1020
+#endif
+
+	.endm
+
+
+	.macro	___invalidate_icache_all ar at
+
+#if XCHAL_ICACHE_SIZE
+	__loop_cache_all \ar \at iii XCHAL_ICACHE_SIZE \
+			 XCHAL_ICACHE_LINEWIDTH 1020
+#endif
+
+	.endm
+
+
+
+	.macro	___flush_invalidate_dcache_range ar as at
+
+#if XCHAL_DCACHE_SIZE
+	__loop_cache_range \ar \as \at dhwbi XCHAL_DCACHE_LINEWIDTH
+#endif
+
+	.endm
+
+
+	.macro	___flush_dcache_range ar as at
+
+#if XCHAL_DCACHE_SIZE
+	__loop_cache_range \ar \as \at dhwb XCHAL_DCACHE_LINEWIDTH
+#endif
+
+	.endm
+
+
+	.macro	___invalidate_dcache_range ar as at
+
+#if XCHAL_DCACHE_SIZE
+	__loop_cache_range \ar \as \at dhi XCHAL_DCACHE_LINEWIDTH
+#endif
+
+	.endm
+
+
+	.macro	___invalidate_icache_range ar as at
+
+#if XCHAL_ICACHE_SIZE
+	__loop_cache_range \ar \as \at ihi XCHAL_ICACHE_LINEWIDTH
+#endif
+
+	.endm
+
+
+
+	.macro	___flush_invalidate_dcache_page ar as
+
+#if XCHAL_DCACHE_SIZE
+	__loop_cache_page \ar \as dhwbi XCHAL_DCACHE_LINEWIDTH 1020
+#endif
+
+	.endm
+
+
+	.macro ___flush_dcache_page ar as
+
+#if XCHAL_DCACHE_SIZE
+	__loop_cache_page \ar \as dhwb XCHAL_DCACHE_LINEWIDTH 1020
+#endif
+
+	.endm
+
+
+	.macro	___invalidate_dcache_page ar as
+
+#if XCHAL_DCACHE_SIZE
+	__loop_cache_page \ar \as dhi XCHAL_DCACHE_LINEWIDTH 1020
+#endif
+
+	.endm
+
+
+	.macro	___invalidate_icache_page ar as
+
+#if XCHAL_ICACHE_SIZE
+	__loop_cache_page \ar \as ihi XCHAL_ICACHE_LINEWIDTH 1020
+#endif
+
+	.endm
diff --git a/arch/xtensa/include/asm/cacheflush.h b/arch/xtensa/include/asm/cacheflush.h
new file mode 100644
index 000000000..7b4359312
--- /dev/null
+++ b/arch/xtensa/include/asm/cacheflush.h
@@ -0,0 +1,184 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * (C) 2001 - 2013 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_CACHEFLUSH_H
+#define _XTENSA_CACHEFLUSH_H
+
+#include <linux/mm.h>
+#include <asm/processor.h>
+#include <asm/page.h>
+
+/*
+ * Lo-level routines for cache flushing.
+ *
+ * invalidate data or instruction cache:
+ *
+ * __invalidate_icache_all()
+ * __invalidate_icache_page(adr)
+ * __invalidate_dcache_page(adr)
+ * __invalidate_icache_range(from,size)
+ * __invalidate_dcache_range(from,size)
+ *
+ * flush data cache:
+ *
+ * __flush_dcache_page(adr)
+ *
+ * flush and invalidate data cache:
+ *
+ * __flush_invalidate_dcache_all()
+ * __flush_invalidate_dcache_page(adr)
+ * __flush_invalidate_dcache_range(from,size)
+ *
+ * specials for cache aliasing:
+ *
+ * __flush_invalidate_dcache_page_alias(vaddr,paddr)
+ * __invalidate_dcache_page_alias(vaddr,paddr)
+ * __invalidate_icache_page_alias(vaddr,paddr)
+ */
+
+extern void __invalidate_dcache_all(void);
+extern void __invalidate_icache_all(void);
+extern void __invalidate_dcache_page(unsigned long);
+extern void __invalidate_icache_page(unsigned long);
+extern void __invalidate_icache_range(unsigned long, unsigned long);
+extern void __invalidate_dcache_range(unsigned long, unsigned long);
+
+#if XCHAL_DCACHE_IS_WRITEBACK
+extern void __flush_invalidate_dcache_all(void);
+extern void __flush_dcache_page(unsigned long);
+extern void __flush_dcache_range(unsigned long, unsigned long);
+extern void __flush_invalidate_dcache_page(unsigned long);
+extern void __flush_invalidate_dcache_range(unsigned long, unsigned long);
+#else
+static inline void __flush_dcache_page(unsigned long va)
+{
+}
+static inline void __flush_dcache_range(unsigned long va, unsigned long sz)
+{
+}
+# define __flush_invalidate_dcache_all()	__invalidate_dcache_all()
+# define __flush_invalidate_dcache_page(p)	__invalidate_dcache_page(p)
+# define __flush_invalidate_dcache_range(p,s)	__invalidate_dcache_range(p,s)
+#endif
+
+#if defined(CONFIG_MMU) && (DCACHE_WAY_SIZE > PAGE_SIZE)
+extern void __flush_invalidate_dcache_page_alias(unsigned long, unsigned long);
+extern void __invalidate_dcache_page_alias(unsigned long, unsigned long);
+#else
+static inline void __flush_invalidate_dcache_page_alias(unsigned long virt,
+							unsigned long phys) { }
+static inline void __invalidate_dcache_page_alias(unsigned long virt,
+						  unsigned long phys) { }
+#endif
+#if defined(CONFIG_MMU) && (ICACHE_WAY_SIZE > PAGE_SIZE)
+extern void __invalidate_icache_page_alias(unsigned long, unsigned long);
+#else
+static inline void __invalidate_icache_page_alias(unsigned long virt,
+						unsigned long phys) { }
+#endif
+
+/*
+ * We have physically tagged caches - nothing to do here -
+ * unless we have cache aliasing.
+ *
+ * Pages can get remapped. Because this might change the 'color' of that page,
+ * we have to flush the cache before the PTE is changed.
+ * (see also Documentation/core-api/cachetlb.rst)
+ */
+
+#if defined(CONFIG_MMU) && \
+	((DCACHE_WAY_SIZE > PAGE_SIZE) || defined(CONFIG_SMP))
+
+#ifdef CONFIG_SMP
+void flush_cache_all(void);
+void flush_cache_range(struct vm_area_struct*, ulong, ulong);
+void flush_icache_range(unsigned long start, unsigned long end);
+void flush_cache_page(struct vm_area_struct*,
+			     unsigned long, unsigned long);
+#else
+#define flush_cache_all local_flush_cache_all
+#define flush_cache_range local_flush_cache_range
+#define flush_icache_range local_flush_icache_range
+#define flush_cache_page  local_flush_cache_page
+#endif
+
+#define local_flush_cache_all()						\
+	do {								\
+		__flush_invalidate_dcache_all();			\
+		__invalidate_icache_all();				\
+	} while (0)
+
+#define flush_cache_mm(mm)		flush_cache_all()
+#define flush_cache_dup_mm(mm)		flush_cache_mm(mm)
+
+#define flush_cache_vmap(start,end)	flush_cache_all()
+#define flush_cache_vunmap(start,end)	flush_cache_all()
+
+#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
+void flush_dcache_page(struct page *);
+
+void local_flush_cache_range(struct vm_area_struct *vma,
+		unsigned long start, unsigned long end);
+void local_flush_cache_page(struct vm_area_struct *vma,
+		unsigned long address, unsigned long pfn);
+
+#else
+
+#define flush_cache_all()				do { } while (0)
+#define flush_cache_mm(mm)				do { } while (0)
+#define flush_cache_dup_mm(mm)				do { } while (0)
+
+#define flush_cache_vmap(start,end)			do { } while (0)
+#define flush_cache_vunmap(start,end)			do { } while (0)
+
+#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
+#define flush_dcache_page(page)				do { } while (0)
+
+#define flush_icache_range local_flush_icache_range
+#define flush_cache_page(vma, addr, pfn)		do { } while (0)
+#define flush_cache_range(vma, start, end)		do { } while (0)
+
+#endif
+
+#define flush_icache_user_range flush_icache_range
+
+/* Ensure consistency between data and instruction cache. */
+#define local_flush_icache_range(start, end)				\
+	do {								\
+		__flush_dcache_range(start, (end) - (start));		\
+		__invalidate_icache_range(start,(end) - (start));	\
+	} while (0)
+
+/* This is not required, see Documentation/core-api/cachetlb.rst */
+#define	flush_icache_page(vma,page)			do { } while (0)
+
+#define flush_dcache_mmap_lock(mapping)			do { } while (0)
+#define flush_dcache_mmap_unlock(mapping)		do { } while (0)
+
+#if defined(CONFIG_MMU) && (DCACHE_WAY_SIZE > PAGE_SIZE)
+
+extern void copy_to_user_page(struct vm_area_struct*, struct page*,
+		unsigned long, void*, const void*, unsigned long);
+extern void copy_from_user_page(struct vm_area_struct*, struct page*,
+		unsigned long, void*, const void*, unsigned long);
+
+#else
+
+#define copy_to_user_page(vma, page, vaddr, dst, src, len)		\
+	do {								\
+		memcpy(dst, src, len);					\
+		__flush_dcache_range((unsigned long) dst, len);		\
+		__invalidate_icache_range((unsigned long) dst, len);	\
+	} while (0)
+
+#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
+	memcpy(dst, src, len)
+
+#endif
+
+#endif /* _XTENSA_CACHEFLUSH_H */
diff --git a/arch/xtensa/include/asm/checksum.h b/arch/xtensa/include/asm/checksum.h
new file mode 100644
index 000000000..44ec1d0b2
--- /dev/null
+++ b/arch/xtensa/include/asm/checksum.h
@@ -0,0 +1,247 @@
+/*
+ * include/asm-xtensa/checksum.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_CHECKSUM_H
+#define _XTENSA_CHECKSUM_H
+
+#include <linux/in6.h>
+#include <linux/uaccess.h>
+#include <asm/core.h>
+
+/*
+ * computes the checksum of a memory block at buff, length len,
+ * and adds in "sum" (32-bit)
+ *
+ * returns a 32-bit number suitable for feeding into itself
+ * or csum_tcpudp_magic
+ *
+ * this function must be called with even lengths, except
+ * for the last fragment, which may be odd
+ *
+ * it's best to have buff aligned on a 32-bit boundary
+ */
+asmlinkage __wsum csum_partial(const void *buff, int len, __wsum sum);
+
+/*
+ * the same as csum_partial, but copies from src while it
+ * checksums, and handles user-space pointer exceptions correctly, when needed.
+ *
+ * here even more important to align src and dst on a 32-bit (or even
+ * better 64-bit) boundary
+ */
+
+asmlinkage __wsum csum_partial_copy_generic(const void *src, void *dst, int len);
+
+#define _HAVE_ARCH_CSUM_AND_COPY
+/*
+ *	Note: when you get a NULL pointer exception here this means someone
+ *	passed in an incorrect kernel address to one of these functions.
+ */
+static inline
+__wsum csum_partial_copy_nocheck(const void *src, void *dst, int len)
+{
+	return csum_partial_copy_generic(src, dst, len);
+}
+
+#define _HAVE_ARCH_COPY_AND_CSUM_FROM_USER
+static inline
+__wsum csum_and_copy_from_user(const void __user *src, void *dst,
+				   int len)
+{
+	if (!access_ok(src, len))
+		return 0;
+	return csum_partial_copy_generic((__force const void *)src, dst, len);
+}
+
+/*
+ *	Fold a partial checksum
+ */
+
+static __inline__ __sum16 csum_fold(__wsum sum)
+{
+	unsigned int __dummy;
+	__asm__("extui	%1, %0, 16, 16\n\t"
+		"extui	%0 ,%0, 0, 16\n\t"
+		"add	%0, %0, %1\n\t"
+		"slli	%1, %0, 16\n\t"
+		"add	%0, %0, %1\n\t"
+		"extui	%0, %0, 16, 16\n\t"
+		"neg	%0, %0\n\t"
+		"addi	%0, %0, -1\n\t"
+		"extui	%0, %0, 0, 16\n\t"
+		: "=r" (sum), "=&r" (__dummy)
+		: "0" (sum));
+	return (__force __sum16)sum;
+}
+
+/*
+ *	This is a version of ip_compute_csum() optimized for IP headers,
+ *	which always checksum on 4 octet boundaries.
+ */
+static __inline__ __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
+{
+	unsigned int sum, tmp, endaddr;
+
+	__asm__ __volatile__(
+		"sub		%0, %0, %0\n\t"
+#if XCHAL_HAVE_LOOPS
+		"loopgtz	%2, 2f\n\t"
+#else
+		"beqz		%2, 2f\n\t"
+		"slli		%4, %2, 2\n\t"
+		"add		%4, %4, %1\n\t"
+		"0:\t"
+#endif
+		"l32i		%3, %1, 0\n\t"
+		"add		%0, %0, %3\n\t"
+		"bgeu		%0, %3, 1f\n\t"
+		"addi		%0, %0, 1\n\t"
+		"1:\t"
+		"addi		%1, %1, 4\n\t"
+#if !XCHAL_HAVE_LOOPS
+		"blt		%1, %4, 0b\n\t"
+#endif
+		"2:\t"
+	/* Since the input registers which are loaded with iph and ihl
+	   are modified, we must also specify them as outputs, or gcc
+	   will assume they contain their original values. */
+		: "=r" (sum), "=r" (iph), "=r" (ihl), "=&r" (tmp),
+		  "=&r" (endaddr)
+		: "1" (iph), "2" (ihl)
+		: "memory");
+
+	return	csum_fold(sum);
+}
+
+static __inline__ __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
+					    __u32 len, __u8 proto,
+					    __wsum sum)
+{
+
+#ifdef __XTENSA_EL__
+	unsigned long len_proto = (len + proto) << 8;
+#elif defined(__XTENSA_EB__)
+	unsigned long len_proto = len + proto;
+#else
+# error processor byte order undefined!
+#endif
+	__asm__("add	%0, %0, %1\n\t"
+		"bgeu	%0, %1, 1f\n\t"
+		"addi	%0, %0, 1\n\t"
+		"1:\t"
+		"add	%0, %0, %2\n\t"
+		"bgeu	%0, %2, 1f\n\t"
+		"addi	%0, %0, 1\n\t"
+		"1:\t"
+		"add	%0, %0, %3\n\t"
+		"bgeu	%0, %3, 1f\n\t"
+		"addi	%0, %0, 1\n\t"
+		"1:\t"
+		: "=r" (sum), "=r" (len_proto)
+		: "r" (daddr), "r" (saddr), "1" (len_proto), "0" (sum));
+	return sum;
+}
+
+/*
+ * computes the checksum of the TCP/UDP pseudo-header
+ * returns a 16-bit checksum, already complemented
+ */
+static __inline__ __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
+					    __u32 len, __u8 proto,
+					    __wsum sum)
+{
+	return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
+}
+
+/*
+ * this routine is used for miscellaneous IP-like checksums, mainly
+ * in icmp.c
+ */
+
+static __inline__ __sum16 ip_compute_csum(const void *buff, int len)
+{
+	return csum_fold (csum_partial(buff, len, 0));
+}
+
+#define _HAVE_ARCH_IPV6_CSUM
+static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
+					  const struct in6_addr *daddr,
+					  __u32 len, __u8 proto,
+					  __wsum sum)
+{
+	unsigned int __dummy;
+	__asm__("l32i	%1, %2, 0\n\t"
+		"add	%0, %0, %1\n\t"
+		"bgeu	%0, %1, 1f\n\t"
+		"addi	%0, %0, 1\n\t"
+		"1:\t"
+		"l32i	%1, %2, 4\n\t"
+		"add	%0, %0, %1\n\t"
+		"bgeu	%0, %1, 1f\n\t"
+		"addi	%0, %0, 1\n\t"
+		"1:\t"
+		"l32i	%1, %2, 8\n\t"
+		"add	%0, %0, %1\n\t"
+		"bgeu	%0, %1, 1f\n\t"
+		"addi	%0, %0, 1\n\t"
+		"1:\t"
+		"l32i	%1, %2, 12\n\t"
+		"add	%0, %0, %1\n\t"
+		"bgeu	%0, %1, 1f\n\t"
+		"addi	%0, %0, 1\n\t"
+		"1:\t"
+		"l32i	%1, %3, 0\n\t"
+		"add	%0, %0, %1\n\t"
+		"bgeu	%0, %1, 1f\n\t"
+		"addi	%0, %0, 1\n\t"
+		"1:\t"
+		"l32i	%1, %3, 4\n\t"
+		"add	%0, %0, %1\n\t"
+		"bgeu	%0, %1, 1f\n\t"
+		"addi	%0, %0, 1\n\t"
+		"1:\t"
+		"l32i	%1, %3, 8\n\t"
+		"add	%0, %0, %1\n\t"
+		"bgeu	%0, %1, 1f\n\t"
+		"addi	%0, %0, 1\n\t"
+		"1:\t"
+		"l32i	%1, %3, 12\n\t"
+		"add	%0, %0, %1\n\t"
+		"bgeu	%0, %1, 1f\n\t"
+		"addi	%0, %0, 1\n\t"
+		"1:\t"
+		"add	%0, %0, %4\n\t"
+		"bgeu	%0, %4, 1f\n\t"
+		"addi	%0, %0, 1\n\t"
+		"1:\t"
+		"add	%0, %0, %5\n\t"
+		"bgeu	%0, %5, 1f\n\t"
+		"addi	%0, %0, 1\n\t"
+		"1:\t"
+		: "=r" (sum), "=&r" (__dummy)
+		: "r" (saddr), "r" (daddr),
+		  "r" (htonl(len)), "r" (htonl(proto)), "0" (sum)
+		: "memory");
+
+	return csum_fold(sum);
+}
+
+/*
+ *	Copy and checksum to user
+ */
+#define HAVE_CSUM_COPY_USER
+static __inline__ __wsum csum_and_copy_to_user(const void *src,
+					       void __user *dst, int len)
+{
+	if (!access_ok(dst, len))
+		return 0;
+	return csum_partial_copy_generic(src, (__force void *)dst, len);
+}
+#endif
diff --git a/arch/xtensa/include/asm/cmpxchg.h b/arch/xtensa/include/asm/cmpxchg.h
new file mode 100644
index 000000000..eb8781035
--- /dev/null
+++ b/arch/xtensa/include/asm/cmpxchg.h
@@ -0,0 +1,223 @@
+/*
+ * Atomic xchg and cmpxchg operations.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_CMPXCHG_H
+#define _XTENSA_CMPXCHG_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/bits.h>
+#include <linux/stringify.h>
+
+/*
+ * cmpxchg
+ */
+
+static inline unsigned long
+__cmpxchg_u32(volatile int *p, int old, int new)
+{
+#if XCHAL_HAVE_EXCLUSIVE
+	unsigned long tmp, result;
+
+	__asm__ __volatile__(
+			"1:     l32ex   %[result], %[addr]\n"
+			"       bne     %[result], %[cmp], 2f\n"
+			"       mov     %[tmp], %[new]\n"
+			"       s32ex   %[tmp], %[addr]\n"
+			"       getex   %[tmp]\n"
+			"       beqz    %[tmp], 1b\n"
+			"2:\n"
+			: [result] "=&a" (result), [tmp] "=&a" (tmp)
+			: [new] "a" (new), [addr] "a" (p), [cmp] "a" (old)
+			: "memory"
+			);
+
+	return result;
+#elif XCHAL_HAVE_S32C1I
+	__asm__ __volatile__(
+			"       wsr     %[cmp], scompare1\n"
+			"       s32c1i  %[new], %[mem]\n"
+			: [new] "+a" (new), [mem] "+m" (*p)
+			: [cmp] "a" (old)
+			: "memory"
+			);
+
+	return new;
+#else
+	__asm__ __volatile__(
+			"       rsil    a14, "__stringify(TOPLEVEL)"\n"
+			"       l32i    %[old], %[mem]\n"
+			"       bne     %[old], %[cmp], 1f\n"
+			"       s32i    %[new], %[mem]\n"
+			"1:\n"
+			"       wsr     a14, ps\n"
+			"       rsync\n"
+			: [old] "=&a" (old), [mem] "+m" (*p)
+			: [cmp] "a" (old), [new] "r" (new)
+			: "a14", "memory");
+	return old;
+#endif
+}
+/* This function doesn't exist, so you'll get a linker error
+ * if something tries to do an invalid cmpxchg(). */
+
+extern void __cmpxchg_called_with_bad_pointer(void);
+
+static __inline__ unsigned long
+__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
+{
+	switch (size) {
+	case 4:  return __cmpxchg_u32(ptr, old, new);
+	default: __cmpxchg_called_with_bad_pointer();
+		 return old;
+	}
+}
+
+#define arch_cmpxchg(ptr,o,n)						      \
+	({ __typeof__(*(ptr)) _o_ = (o);				      \
+	   __typeof__(*(ptr)) _n_ = (n);				      \
+	   (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_,	      \
+	   			        (unsigned long)_n_, sizeof (*(ptr))); \
+	})
+
+#include <asm-generic/cmpxchg-local.h>
+
+static inline unsigned long __cmpxchg_local(volatile void *ptr,
+				      unsigned long old,
+				      unsigned long new, int size)
+{
+	switch (size) {
+	case 4:
+		return __cmpxchg_u32(ptr, old, new);
+	default:
+		return __generic_cmpxchg_local(ptr, old, new, size);
+	}
+
+	return old;
+}
+
+/*
+ * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
+ * them available.
+ */
+#define arch_cmpxchg_local(ptr, o, n)				  	       \
+	((__typeof__(*(ptr)))__generic_cmpxchg_local((ptr), (unsigned long)(o),\
+			(unsigned long)(n), sizeof(*(ptr))))
+#define arch_cmpxchg64_local(ptr, o, n) __generic_cmpxchg64_local((ptr), (o), (n))
+#define arch_cmpxchg64(ptr, o, n)    arch_cmpxchg64_local((ptr), (o), (n))
+
+/*
+ * xchg_u32
+ *
+ * Note that a14 is used here because the register allocation
+ * done by the compiler is not guaranteed and a window overflow
+ * may not occur between the rsil and wsr instructions. By using
+ * a14 in the rsil, the machine is guaranteed to be in a state
+ * where no register reference will cause an overflow.
+ */
+
+static inline unsigned long xchg_u32(volatile int * m, unsigned long val)
+{
+#if XCHAL_HAVE_EXCLUSIVE
+	unsigned long tmp, result;
+
+	__asm__ __volatile__(
+			"1:     l32ex   %[result], %[addr]\n"
+			"       mov     %[tmp], %[val]\n"
+			"       s32ex   %[tmp], %[addr]\n"
+			"       getex   %[tmp]\n"
+			"       beqz    %[tmp], 1b\n"
+			: [result] "=&a" (result), [tmp] "=&a" (tmp)
+			: [val] "a" (val), [addr] "a" (m)
+			: "memory"
+			);
+
+	return result;
+#elif XCHAL_HAVE_S32C1I
+	unsigned long tmp, result;
+	__asm__ __volatile__(
+			"1:     l32i    %[tmp], %[mem]\n"
+			"       mov     %[result], %[val]\n"
+			"       wsr     %[tmp], scompare1\n"
+			"       s32c1i  %[result], %[mem]\n"
+			"       bne     %[result], %[tmp], 1b\n"
+			: [result] "=&a" (result), [tmp] "=&a" (tmp),
+			  [mem] "+m" (*m)
+			: [val] "a" (val)
+			: "memory"
+			);
+	return result;
+#else
+	unsigned long tmp;
+	__asm__ __volatile__(
+			"       rsil    a14, "__stringify(TOPLEVEL)"\n"
+			"       l32i    %[tmp], %[mem]\n"
+			"       s32i    %[val], %[mem]\n"
+			"       wsr     a14, ps\n"
+			"       rsync\n"
+			: [tmp] "=&a" (tmp), [mem] "+m" (*m)
+			: [val] "a" (val)
+			: "a14", "memory");
+	return tmp;
+#endif
+}
+
+#define arch_xchg(ptr,x) \
+	((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
+
+static inline u32 xchg_small(volatile void *ptr, u32 x, int size)
+{
+	int off = (unsigned long)ptr % sizeof(u32);
+	volatile u32 *p = ptr - off;
+#ifdef __BIG_ENDIAN
+	int bitoff = (sizeof(u32) - size - off) * BITS_PER_BYTE;
+#else
+	int bitoff = off * BITS_PER_BYTE;
+#endif
+	u32 bitmask = ((0x1 << size * BITS_PER_BYTE) - 1) << bitoff;
+	u32 oldv, newv;
+	u32 ret;
+
+	do {
+		oldv = READ_ONCE(*p);
+		ret = (oldv & bitmask) >> bitoff;
+		newv = (oldv & ~bitmask) | (x << bitoff);
+	} while (__cmpxchg_u32(p, oldv, newv) != oldv);
+
+	return ret;
+}
+
+/*
+ * This only works if the compiler isn't horribly bad at optimizing.
+ * gcc-2.5.8 reportedly can't handle this, but I define that one to
+ * be dead anyway.
+ */
+
+extern void __xchg_called_with_bad_pointer(void);
+
+static __inline__ unsigned long
+__xchg(unsigned long x, volatile void * ptr, int size)
+{
+	switch (size) {
+	case 1:
+		return xchg_small(ptr, x, 1);
+	case 2:
+		return xchg_small(ptr, x, 2);
+	case 4:
+		return xchg_u32(ptr, x);
+	default:
+		__xchg_called_with_bad_pointer();
+		return x;
+	}
+}
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _XTENSA_CMPXCHG_H */
diff --git a/arch/xtensa/include/asm/coprocessor.h b/arch/xtensa/include/asm/coprocessor.h
new file mode 100644
index 000000000..3b1a0d5d2
--- /dev/null
+++ b/arch/xtensa/include/asm/coprocessor.h
@@ -0,0 +1,155 @@
+/*
+ * include/asm-xtensa/coprocessor.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2003 - 2007 Tensilica Inc.
+ */
+
+
+#ifndef _XTENSA_COPROCESSOR_H
+#define _XTENSA_COPROCESSOR_H
+
+#include <variant/tie.h>
+#include <asm/core.h>
+#include <asm/types.h>
+
+#ifdef __ASSEMBLY__
+# include <variant/tie-asm.h>
+
+.macro	xchal_sa_start  a b
+	.set .Lxchal_pofs_, 0
+	.set .Lxchal_ofs_, 0
+.endm
+
+.macro	xchal_sa_align  ptr minofs maxofs ofsalign totalign
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + .Lxchal_pofs_ + \totalign - 1
+	.set	.Lxchal_ofs_, (.Lxchal_ofs_ & -\totalign) - .Lxchal_pofs_
+.endm
+
+#define _SELECT	(  XTHAL_SAS_TIE | XTHAL_SAS_OPT \
+		 | XTHAL_SAS_CC \
+		 | XTHAL_SAS_CALR | XTHAL_SAS_CALE )
+
+.macro save_xtregs_opt ptr clb at1 at2 at3 at4 offset
+	.if XTREGS_OPT_SIZE > 0
+		addi	\clb, \ptr, \offset
+		xchal_ncp_store \clb \at1 \at2 \at3 \at4 select=_SELECT
+	.endif
+.endm
+
+.macro load_xtregs_opt ptr clb at1 at2 at3 at4 offset
+	.if XTREGS_OPT_SIZE > 0
+		addi	\clb, \ptr, \offset
+		xchal_ncp_load \clb \at1 \at2 \at3 \at4 select=_SELECT
+	.endif
+.endm
+#undef _SELECT
+
+#define _SELECT	(  XTHAL_SAS_TIE | XTHAL_SAS_OPT \
+		 | XTHAL_SAS_NOCC \
+		 | XTHAL_SAS_CALR | XTHAL_SAS_CALE | XTHAL_SAS_GLOB )
+
+.macro save_xtregs_user ptr clb at1 at2 at3 at4 offset
+	.if XTREGS_USER_SIZE > 0
+		addi	\clb, \ptr, \offset
+		xchal_ncp_store \clb \at1 \at2 \at3 \at4 select=_SELECT
+	.endif
+.endm
+
+.macro load_xtregs_user ptr clb at1 at2 at3 at4 offset
+	.if XTREGS_USER_SIZE > 0
+		addi	\clb, \ptr, \offset
+		xchal_ncp_load \clb \at1 \at2 \at3 \at4 select=_SELECT
+	.endif
+.endm
+#undef _SELECT
+
+
+
+#endif	/* __ASSEMBLY__ */
+
+/*
+ * XTENSA_HAVE_COPROCESSOR(x) returns 1 if coprocessor x is configured.
+ *
+ * XTENSA_HAVE_IO_PORT(x) returns 1 if io-port x is configured.
+ *
+ */
+
+#define XTENSA_HAVE_COPROCESSOR(x)					\
+	((XCHAL_CP_MASK ^ XCHAL_CP_PORT_MASK) & (1 << (x)))
+#define XTENSA_HAVE_COPROCESSORS					\
+	(XCHAL_CP_MASK ^ XCHAL_CP_PORT_MASK)
+#define XTENSA_HAVE_IO_PORT(x)						\
+	(XCHAL_CP_PORT_MASK & (1 << (x)))
+#define XTENSA_HAVE_IO_PORTS						\
+	XCHAL_CP_PORT_MASK
+
+#ifndef __ASSEMBLY__
+
+/*
+ * Additional registers.
+ * We define three types of additional registers:
+ *  ext: extra registers that are used by the compiler
+ *  cpn: optional registers that can be used by a user application
+ *  cpX: coprocessor registers that can only be used if the corresponding
+ *       CPENABLE bit is set.
+ */
+
+#define XCHAL_SA_REG(list,cc,abi,type,y,name,z,align,size,...)	\
+	__REG ## list (cc, abi, type, name, size, align)
+
+#define __REG0(cc,abi,t,name,s,a)	__REG0_ ## cc (abi,name)
+#define __REG1(cc,abi,t,name,s,a)	__REG1_ ## cc (name)
+#define __REG2(cc,abi,type,...)		__REG2_ ## type (__VA_ARGS__)
+
+#define __REG0_0(abi,name)
+#define __REG0_1(abi,name)		__REG0_1 ## abi (name)
+#define __REG0_10(name)	__u32 name;
+#define __REG0_11(name)	__u32 name;
+#define __REG0_12(name)
+
+#define __REG1_0(name)	__u32 name;
+#define __REG1_1(name)
+
+#define __REG2_0(n,s,a)	__u32 name;
+#define __REG2_1(n,s,a)	unsigned char n[s] __attribute__ ((aligned(a)));
+#define __REG2_2(n,s,a) unsigned char n[s] __attribute__ ((aligned(a)));
+
+typedef struct { XCHAL_NCP_SA_LIST(0) } xtregs_opt_t
+	__attribute__ ((aligned (XCHAL_NCP_SA_ALIGN)));
+typedef struct { XCHAL_NCP_SA_LIST(1) } xtregs_user_t
+	__attribute__ ((aligned (XCHAL_NCP_SA_ALIGN)));
+
+#if XTENSA_HAVE_COPROCESSORS
+
+typedef struct { XCHAL_CP0_SA_LIST(2) } xtregs_cp0_t
+	__attribute__ ((aligned (XCHAL_CP0_SA_ALIGN)));
+typedef struct { XCHAL_CP1_SA_LIST(2) } xtregs_cp1_t
+	__attribute__ ((aligned (XCHAL_CP1_SA_ALIGN)));
+typedef struct { XCHAL_CP2_SA_LIST(2) } xtregs_cp2_t
+	__attribute__ ((aligned (XCHAL_CP2_SA_ALIGN)));
+typedef struct { XCHAL_CP3_SA_LIST(2) } xtregs_cp3_t
+	__attribute__ ((aligned (XCHAL_CP3_SA_ALIGN)));
+typedef struct { XCHAL_CP4_SA_LIST(2) } xtregs_cp4_t
+	__attribute__ ((aligned (XCHAL_CP4_SA_ALIGN)));
+typedef struct { XCHAL_CP5_SA_LIST(2) } xtregs_cp5_t
+	__attribute__ ((aligned (XCHAL_CP5_SA_ALIGN)));
+typedef struct { XCHAL_CP6_SA_LIST(2) } xtregs_cp6_t
+	__attribute__ ((aligned (XCHAL_CP6_SA_ALIGN)));
+typedef struct { XCHAL_CP7_SA_LIST(2) } xtregs_cp7_t
+	__attribute__ ((aligned (XCHAL_CP7_SA_ALIGN)));
+
+struct thread_info;
+void coprocessor_flush(struct thread_info *ti, int cp_index);
+void coprocessor_release_all(struct thread_info *ti);
+void coprocessor_flush_all(struct thread_info *ti);
+void coprocessor_flush_release_all(struct thread_info *ti);
+void local_coprocessors_flush_release_all(void);
+
+#endif	/* XTENSA_HAVE_COPROCESSORS */
+
+#endif	/* !__ASSEMBLY__ */
+#endif	/* _XTENSA_COPROCESSOR_H */
diff --git a/arch/xtensa/include/asm/core.h b/arch/xtensa/include/asm/core.h
new file mode 100644
index 000000000..25293269e
--- /dev/null
+++ b/arch/xtensa/include/asm/core.h
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2019 Cadence Design Systems Inc. */
+
+#ifndef _ASM_XTENSA_CORE_H
+#define _ASM_XTENSA_CORE_H
+
+#include <variant/core.h>
+
+#ifndef XCHAL_HAVE_DIV32
+#define XCHAL_HAVE_DIV32 0
+#endif
+
+#ifndef XCHAL_HAVE_EXCLUSIVE
+#define XCHAL_HAVE_EXCLUSIVE 0
+#endif
+
+#ifndef XCHAL_HAVE_EXTERN_REGS
+#define XCHAL_HAVE_EXTERN_REGS 0
+#endif
+
+#ifndef XCHAL_HAVE_MPU
+#define XCHAL_HAVE_MPU 0
+#endif
+
+#ifndef XCHAL_HAVE_VECBASE
+#define XCHAL_HAVE_VECBASE 0
+#endif
+
+#ifndef XCHAL_SPANNING_WAY
+#define XCHAL_SPANNING_WAY 0
+#endif
+
+#if XCHAL_HAVE_WINDOWED
+#if defined(CONFIG_USER_ABI_DEFAULT) || defined(CONFIG_USER_ABI_CALL0_PROBE)
+/* Whether windowed ABI is supported in userspace. */
+#define USER_SUPPORT_WINDOWED
+#endif
+#if defined(__XTENSA_WINDOWED_ABI__) || defined(USER_SUPPORT_WINDOWED)
+/* Whether windowed ABI is supported either in userspace or in the kernel. */
+#define SUPPORT_WINDOWED
+#endif
+#endif
+
+/* Xtensa ABI requires stack alignment to be at least 16 */
+#if XCHAL_DATA_WIDTH > 16
+#define XTENSA_STACK_ALIGNMENT	XCHAL_DATA_WIDTH
+#else
+#define XTENSA_STACK_ALIGNMENT	16
+#endif
+
+#ifndef XCHAL_HW_MIN_VERSION
+#if defined(XCHAL_HW_MIN_VERSION_MAJOR) && defined(XCHAL_HW_MIN_VERSION_MINOR)
+#define XCHAL_HW_MIN_VERSION (XCHAL_HW_MIN_VERSION_MAJOR * 100 + \
+			      XCHAL_HW_MIN_VERSION_MINOR)
+#else
+#define XCHAL_HW_MIN_VERSION 0
+#endif
+#endif
+
+#endif
diff --git a/arch/xtensa/include/asm/current.h b/arch/xtensa/include/asm/current.h
new file mode 100644
index 000000000..08010dbf5
--- /dev/null
+++ b/arch/xtensa/include/asm/current.h
@@ -0,0 +1,40 @@
+/*
+ * include/asm-xtensa/current.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_CURRENT_H
+#define _XTENSA_CURRENT_H
+
+#include <asm/thread_info.h>
+
+#ifndef __ASSEMBLY__
+
+#include <linux/thread_info.h>
+
+struct task_struct;
+
+static inline struct task_struct *get_current(void)
+{
+	return current_thread_info()->task;
+}
+
+#define current get_current()
+
+register unsigned long current_stack_pointer __asm__("a1");
+
+#else
+
+#define GET_CURRENT(reg,sp)		\
+	GET_THREAD_INFO(reg,sp);	\
+	l32i reg, reg, TI_TASK		\
+
+#endif
+
+
+#endif /* XTENSA_CURRENT_H */
diff --git a/arch/xtensa/include/asm/delay.h b/arch/xtensa/include/asm/delay.h
new file mode 100644
index 000000000..24304b39a
--- /dev/null
+++ b/arch/xtensa/include/asm/delay.h
@@ -0,0 +1,75 @@
+/*
+ * include/asm-xtensa/delay.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ *
+ */
+
+#ifndef _XTENSA_DELAY_H
+#define _XTENSA_DELAY_H
+
+#include <asm/timex.h>
+#include <asm/param.h>
+
+extern unsigned long loops_per_jiffy;
+
+static inline void __delay(unsigned long loops)
+{
+	if (__builtin_constant_p(loops) && loops < 2)
+		__asm__ __volatile__ ("nop");
+	else if (loops >= 2)
+		/* 2 cycles per loop. */
+		__asm__ __volatile__ ("1: addi %0, %0, -2; bgeui %0, 2, 1b"
+				: "+r" (loops));
+}
+
+/* Undefined function to get compile-time error */
+void __bad_udelay(void);
+void __bad_ndelay(void);
+
+#define __MAX_UDELAY 30000
+#define __MAX_NDELAY 30000
+
+static inline void __udelay(unsigned long usecs)
+{
+	unsigned long start = get_ccount();
+	unsigned long cycles = (usecs * (ccount_freq >> 15)) >> 5;
+
+	/* Note: all variables are unsigned (can wrap around)! */
+	while (((unsigned long)get_ccount()) - start < cycles)
+		cpu_relax();
+}
+
+static inline void udelay(unsigned long usec)
+{
+	if (__builtin_constant_p(usec) && usec >= __MAX_UDELAY)
+		__bad_udelay();
+	else
+		__udelay(usec);
+}
+
+static inline void __ndelay(unsigned long nsec)
+{
+	/*
+	 * Inner shift makes sure multiplication doesn't overflow
+	 * for legitimate nsec values
+	 */
+	unsigned long cycles = (nsec * (ccount_freq >> 15)) >> 15;
+	__delay(cycles);
+}
+
+#define ndelay(n) ndelay(n)
+
+static inline void ndelay(unsigned long nsec)
+{
+	if (__builtin_constant_p(nsec) && nsec >= __MAX_NDELAY)
+		__bad_ndelay();
+	else
+		__ndelay(nsec);
+}
+
+#endif
diff --git a/arch/xtensa/include/asm/dma.h b/arch/xtensa/include/asm/dma.h
new file mode 100644
index 000000000..172644539
--- /dev/null
+++ b/arch/xtensa/include/asm/dma.h
@@ -0,0 +1,55 @@
+/*
+ * include/asm-xtensa/dma.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2003 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_DMA_H
+#define _XTENSA_DMA_H
+
+#include <asm/io.h>		/* need byte IO */
+
+/*
+ * This is only to be defined if we have PC-like DMA.
+ * By default this is not true on an Xtensa processor,
+ * however on boards with a PCI bus, such functionality
+ * might be emulated externally.
+ *
+ * NOTE:  there still exists driver code that assumes
+ * this is defined, eg. drivers/sound/soundcard.c (as of 2.4).
+ */
+#define MAX_DMA_CHANNELS	8
+
+/*
+ * The maximum virtual address to which DMA transfers
+ * can be performed on this platform.
+ *
+ * NOTE: This is board (platform) specific, not processor-specific!
+ *
+ * NOTE: This assumes DMA transfers can only be performed on
+ *	the section of physical memory contiguously mapped in virtual
+ *	space for the kernel.  For the Xtensa architecture, this
+ *	means the maximum possible size of this DMA area is
+ *	the size of the statically mapped kernel segment
+ *	(XCHAL_KSEG_{CACHED,BYPASS}_SIZE), ie. 128 MB.
+ *
+ * NOTE: When the entire KSEG area is DMA capable, we subtract
+ *	one from the max address so that the virt_to_phys() macro
+ *	works correctly on the address (otherwise the address
+ *	enters another area, and virt_to_phys() may not return
+ *	the value desired).
+ */
+
+#ifndef MAX_DMA_ADDRESS
+#define MAX_DMA_ADDRESS		(PAGE_OFFSET + XCHAL_KIO_SIZE - 1)
+#endif
+
+/* Reserve and release a DMA channel */
+extern int request_dma(unsigned int dmanr, const char * device_id);
+extern void free_dma(unsigned int dmanr);
+
+#endif
diff --git a/arch/xtensa/include/asm/elf.h b/arch/xtensa/include/asm/elf.h
new file mode 100644
index 000000000..ffcf1ada1
--- /dev/null
+++ b/arch/xtensa/include/asm/elf.h
@@ -0,0 +1,196 @@
+/*
+ * include/asm-xtensa/elf.h
+ *
+ * ELF register definitions
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_ELF_H
+#define _XTENSA_ELF_H
+
+#include <asm/ptrace.h>
+#include <asm/coprocessor.h>
+#include <linux/elf-em.h>
+
+/* Xtensa processor ELF architecture-magic number */
+
+#define EM_XTENSA_OLD	0xABC7
+
+/* Xtensa relocations defined by the ABIs */
+
+#define R_XTENSA_NONE           0
+#define R_XTENSA_32             1
+#define R_XTENSA_RTLD           2
+#define R_XTENSA_GLOB_DAT       3
+#define R_XTENSA_JMP_SLOT       4
+#define R_XTENSA_RELATIVE       5
+#define R_XTENSA_PLT            6
+#define R_XTENSA_OP0            8
+#define R_XTENSA_OP1            9
+#define R_XTENSA_OP2            10
+#define R_XTENSA_ASM_EXPAND	11
+#define R_XTENSA_ASM_SIMPLIFY	12
+#define R_XTENSA_GNU_VTINHERIT	15
+#define R_XTENSA_GNU_VTENTRY	16
+#define R_XTENSA_DIFF8		17
+#define R_XTENSA_DIFF16		18
+#define R_XTENSA_DIFF32		19
+#define R_XTENSA_SLOT0_OP	20
+#define R_XTENSA_SLOT1_OP	21
+#define R_XTENSA_SLOT2_OP	22
+#define R_XTENSA_SLOT3_OP	23
+#define R_XTENSA_SLOT4_OP	24
+#define R_XTENSA_SLOT5_OP	25
+#define R_XTENSA_SLOT6_OP	26
+#define R_XTENSA_SLOT7_OP	27
+#define R_XTENSA_SLOT8_OP	28
+#define R_XTENSA_SLOT9_OP	29
+#define R_XTENSA_SLOT10_OP	30
+#define R_XTENSA_SLOT11_OP	31
+#define R_XTENSA_SLOT12_OP	32
+#define R_XTENSA_SLOT13_OP	33
+#define R_XTENSA_SLOT14_OP	34
+#define R_XTENSA_SLOT0_ALT	35
+#define R_XTENSA_SLOT1_ALT	36
+#define R_XTENSA_SLOT2_ALT	37
+#define R_XTENSA_SLOT3_ALT	38
+#define R_XTENSA_SLOT4_ALT	39
+#define R_XTENSA_SLOT5_ALT	40
+#define R_XTENSA_SLOT6_ALT	41
+#define R_XTENSA_SLOT7_ALT	42
+#define R_XTENSA_SLOT8_ALT	43
+#define R_XTENSA_SLOT9_ALT	44
+#define R_XTENSA_SLOT10_ALT	45
+#define R_XTENSA_SLOT11_ALT	46
+#define R_XTENSA_SLOT12_ALT	47
+#define R_XTENSA_SLOT13_ALT	48
+#define R_XTENSA_SLOT14_ALT	49
+
+/* ELF register definitions. This is needed for core dump support.  */
+
+typedef unsigned long elf_greg_t;
+
+typedef struct user_pt_regs xtensa_gregset_t;
+
+#define ELF_NGREG	(sizeof(xtensa_gregset_t) / sizeof(elf_greg_t))
+
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+
+#define ELF_NFPREG	18
+
+typedef unsigned int elf_fpreg_t;
+typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
+
+/*
+ * This is used to ensure we don't load something for the wrong architecture.
+ */
+
+#define elf_check_arch(x) ( ( (x)->e_machine == EM_XTENSA )  || \
+			    ( (x)->e_machine == EM_XTENSA_OLD ) )
+
+#define ELFOSABI_XTENSA_FDPIC 65
+#define elf_check_fdpic(x) ((x)->e_ident[EI_OSABI] == ELFOSABI_XTENSA_FDPIC)
+#define ELF_FDPIC_CORE_EFLAGS 0
+
+/*
+ * These are used to set parameters in the core dumps.
+ */
+
+#ifdef __XTENSA_EL__
+# define ELF_DATA	ELFDATA2LSB
+#elif defined(__XTENSA_EB__)
+# define ELF_DATA	ELFDATA2MSB
+#else
+# error processor byte order undefined!
+#endif
+
+#define ELF_CLASS	ELFCLASS32
+#define ELF_ARCH	EM_XTENSA
+
+#define ELF_EXEC_PAGESIZE	PAGE_SIZE
+#define CORE_DUMP_USE_REGSET
+
+/*
+ * This is the location that an ET_DYN program is loaded if exec'ed.  Typical
+ * use of this is to invoke "./ld.so someprog" to test out a new version of
+ * the loader.  We need to make sure that it is out of the way of the program
+ * that it will "exec", and that there is sufficient room for the brk.
+ */
+
+#define ELF_ET_DYN_BASE         (2 * TASK_SIZE / 3)
+
+/*
+ * This yields a mask that user programs can use to figure out what
+ * instruction set this CPU supports.  This could be done in user space,
+ * but it's not easy, and we've already done it here.
+ */
+
+#define ELF_HWCAP	(0)
+
+/*
+ * This yields a string that ld.so will use to load implementation
+ * specific libraries for optimization.  This is more specific in
+ * intent than poking at uname or /proc/cpuinfo.
+ * For the moment, we have only optimizations for the Intel generations,
+ * but that could change...
+ */
+
+#define ELF_PLATFORM  (NULL)
+
+/*
+ * The Xtensa processor ABI says that when the program starts, a2
+ * contains a pointer to a function which might be registered using
+ * `atexit'.  This provides a mean for the dynamic linker to call
+ * DT_FINI functions for shared libraries that have been loaded before
+ * the code runs.
+ *
+ * A value of 0 tells we have no such handler.
+ *
+ * We might as well make sure everything else is cleared too (except
+ * for the stack pointer in a1), just to make things more
+ * deterministic.  Also, clearing a0 terminates debugger backtraces.
+ */
+
+#define ELF_PLAT_INIT(_r, load_addr) \
+	do { \
+		(_r)->areg[0]  = 0; /*(_r)->areg[1] = 0;*/ \
+		(_r)->areg[2]  = 0; (_r)->areg[3]  = 0; \
+		(_r)->areg[4]  = 0; (_r)->areg[5]  = 0; \
+		(_r)->areg[6]  = 0; (_r)->areg[7]  = 0; \
+		(_r)->areg[8]  = 0; (_r)->areg[9]  = 0; \
+		(_r)->areg[10] = 0; (_r)->areg[11] = 0; \
+		(_r)->areg[12] = 0; (_r)->areg[13] = 0; \
+		(_r)->areg[14] = 0; (_r)->areg[15] = 0; \
+	} while (0)
+
+#define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr, dynamic_addr) \
+	do { \
+		(_r)->areg[4] = _exec_map_addr; \
+		(_r)->areg[5] = _interp_map_addr; \
+		(_r)->areg[6] = dynamic_addr; \
+	} while (0)
+
+typedef struct {
+	xtregs_opt_t	opt;
+	xtregs_user_t	user;
+#if XTENSA_HAVE_COPROCESSORS
+	xtregs_cp0_t	cp0;
+	xtregs_cp1_t	cp1;
+	xtregs_cp2_t	cp2;
+	xtregs_cp3_t	cp3;
+	xtregs_cp4_t	cp4;
+	xtregs_cp5_t	cp5;
+	xtregs_cp6_t	cp6;
+	xtregs_cp7_t	cp7;
+#endif
+} elf_xtregs_t;
+
+#define SET_PERSONALITY(ex) \
+	set_personality(PER_LINUX_32BIT | (current->personality & (~PER_MASK)))
+
+#endif	/* _XTENSA_ELF_H */
diff --git a/arch/xtensa/include/asm/fixmap.h b/arch/xtensa/include/asm/fixmap.h
new file mode 100644
index 000000000..1c65dc1d3
--- /dev/null
+++ b/arch/xtensa/include/asm/fixmap.h
@@ -0,0 +1,38 @@
+/*
+ * fixmap.h: compile-time virtual memory allocation
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1998 Ingo Molnar
+ *
+ * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
+ */
+
+#ifndef _ASM_FIXMAP_H
+#define _ASM_FIXMAP_H
+
+#ifdef CONFIG_HIGHMEM
+#include <linux/threads.h>
+#include <linux/pgtable.h>
+#include <asm/kmap_size.h>
+
+/* The map slots for temporary mappings via kmap_atomic/local(). */
+enum fixed_addresses {
+	FIX_KMAP_BEGIN,
+	FIX_KMAP_END = FIX_KMAP_BEGIN +
+		(KM_MAX_IDX * NR_CPUS * DCACHE_N_COLORS) - 1,
+	__end_of_fixed_addresses
+};
+
+#define FIXADDR_END     (XCHAL_KSEG_CACHED_VADDR - PAGE_SIZE)
+#define FIXADDR_SIZE	(__end_of_fixed_addresses << PAGE_SHIFT)
+/* Enforce that FIXADDR_START is PMD aligned to handle cache aliasing */
+#define FIXADDR_START	((FIXADDR_END - FIXADDR_SIZE) & PMD_MASK)
+#define FIXADDR_TOP	(FIXADDR_START + FIXADDR_SIZE - PAGE_SIZE)
+
+#include <asm-generic/fixmap.h>
+
+#endif /* CONFIG_HIGHMEM */
+#endif
diff --git a/arch/xtensa/include/asm/flat.h b/arch/xtensa/include/asm/flat.h
new file mode 100644
index 000000000..ed5870c77
--- /dev/null
+++ b/arch/xtensa/include/asm/flat.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_XTENSA_FLAT_H
+#define __ASM_XTENSA_FLAT_H
+
+#include <asm/unaligned.h>
+
+static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,
+					u32 *addr)
+{
+	*addr = get_unaligned((__force u32 *)rp);
+	return 0;
+}
+static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel)
+{
+	put_unaligned(addr, (__force u32 *)rp);
+	return 0;
+}
+
+#endif /* __ASM_XTENSA_FLAT_H */
diff --git a/arch/xtensa/include/asm/ftrace.h b/arch/xtensa/include/asm/ftrace.h
new file mode 100644
index 000000000..6c6d9a9f1
--- /dev/null
+++ b/arch/xtensa/include/asm/ftrace.h
@@ -0,0 +1,40 @@
+/*
+ * arch/xtensa/include/asm/ftrace.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2013 Tensilica Inc.
+ */
+#ifndef _XTENSA_FTRACE_H
+#define _XTENSA_FTRACE_H
+
+#include <asm/processor.h>
+
+#ifndef __ASSEMBLY__
+#define ftrace_return_address0 ({ unsigned long a0, a1; \
+		__asm__ __volatile__ ( \
+			"mov %0, a0\n" \
+			"mov %1, a1\n" \
+			: "=r"(a0), "=r"(a1)); \
+		MAKE_PC_FROM_RA(a0, a1); })
+
+#ifdef CONFIG_FRAME_POINTER
+extern unsigned long return_address(unsigned level);
+#define ftrace_return_address(n) return_address(n)
+#endif
+#endif /* __ASSEMBLY__ */
+
+#ifdef CONFIG_FUNCTION_TRACER
+
+#define MCOUNT_ADDR ((unsigned long)(_mcount))
+#define MCOUNT_INSN_SIZE 3
+
+#ifndef __ASSEMBLY__
+extern void _mcount(void);
+#define mcount _mcount
+#endif /* __ASSEMBLY__ */
+#endif /* CONFIG_FUNCTION_TRACER */
+
+#endif /* _XTENSA_FTRACE_H */
diff --git a/arch/xtensa/include/asm/futex.h b/arch/xtensa/include/asm/futex.h
new file mode 100644
index 000000000..a6f7d7ab5
--- /dev/null
+++ b/arch/xtensa/include/asm/futex.h
@@ -0,0 +1,167 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Atomic futex routines
+ *
+ * Based on the PowerPC implementataion
+ *
+ * Copyright (C) 2013 TangoTec Ltd.
+ *
+ * Baruch Siach <baruch@tkos.co.il>
+ */
+
+#ifndef _ASM_XTENSA_FUTEX_H
+#define _ASM_XTENSA_FUTEX_H
+
+#include <linux/futex.h>
+#include <linux/uaccess.h>
+#include <linux/errno.h>
+
+#define arch_futex_atomic_op_inuser arch_futex_atomic_op_inuser
+#define futex_atomic_cmpxchg_inatomic futex_atomic_cmpxchg_inatomic
+#include <asm-generic/futex.h>
+
+#if XCHAL_HAVE_EXCLUSIVE
+#define __futex_atomic_op(insn, ret, old, uaddr, arg)	\
+	__asm__ __volatile(				\
+	"1:	l32ex	%[oldval], %[addr]\n"		\
+		insn "\n"				\
+	"2:	s32ex	%[newval], %[addr]\n"		\
+	"	getex	%[newval]\n"			\
+	"	beqz	%[newval], 1b\n"		\
+	"	movi	%[newval], 0\n"			\
+	"3:\n"						\
+	"	.section .fixup,\"ax\"\n"		\
+	"	.align 4\n"				\
+	"	.literal_position\n"			\
+	"5:	movi	%[oldval], 3b\n"		\
+	"	movi	%[newval], %[fault]\n"		\
+	"	jx	%[oldval]\n"			\
+	"	.previous\n"				\
+	"	.section __ex_table,\"a\"\n"		\
+	"	.long 1b, 5b, 2b, 5b\n"			\
+	"	.previous\n"				\
+	: [oldval] "=&r" (old), [newval] "=&r" (ret)	\
+	: [addr] "r" (uaddr), [oparg] "r" (arg),	\
+	  [fault] "I" (-EFAULT)				\
+	: "memory")
+#elif XCHAL_HAVE_S32C1I
+#define __futex_atomic_op(insn, ret, old, uaddr, arg)	\
+	__asm__ __volatile(				\
+	"1:	l32i	%[oldval], %[mem]\n"		\
+		insn "\n"				\
+	"	wsr	%[oldval], scompare1\n"		\
+	"2:	s32c1i	%[newval], %[mem]\n"		\
+	"	bne	%[newval], %[oldval], 1b\n"	\
+	"	movi	%[newval], 0\n"			\
+	"3:\n"						\
+	"	.section .fixup,\"ax\"\n"		\
+	"	.align 4\n"				\
+	"	.literal_position\n"			\
+	"5:	movi	%[oldval], 3b\n"		\
+	"	movi	%[newval], %[fault]\n"		\
+	"	jx	%[oldval]\n"			\
+	"	.previous\n"				\
+	"	.section __ex_table,\"a\"\n"		\
+	"	.long 1b, 5b, 2b, 5b\n"			\
+	"	.previous\n"				\
+	: [oldval] "=&r" (old), [newval] "=&r" (ret),	\
+	  [mem] "+m" (*(uaddr))				\
+	: [oparg] "r" (arg), [fault] "I" (-EFAULT)	\
+	: "memory")
+#endif
+
+static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
+		u32 __user *uaddr)
+{
+#if XCHAL_HAVE_S32C1I || XCHAL_HAVE_EXCLUSIVE
+	int oldval = 0, ret;
+
+	if (!access_ok(uaddr, sizeof(u32)))
+		return -EFAULT;
+
+	switch (op) {
+	case FUTEX_OP_SET:
+		__futex_atomic_op("mov %[newval], %[oparg]",
+				  ret, oldval, uaddr, oparg);
+		break;
+	case FUTEX_OP_ADD:
+		__futex_atomic_op("add %[newval], %[oldval], %[oparg]",
+				  ret, oldval, uaddr, oparg);
+		break;
+	case FUTEX_OP_OR:
+		__futex_atomic_op("or %[newval], %[oldval], %[oparg]",
+				  ret, oldval, uaddr, oparg);
+		break;
+	case FUTEX_OP_ANDN:
+		__futex_atomic_op("and %[newval], %[oldval], %[oparg]",
+				  ret, oldval, uaddr, ~oparg);
+		break;
+	case FUTEX_OP_XOR:
+		__futex_atomic_op("xor %[newval], %[oldval], %[oparg]",
+				  ret, oldval, uaddr, oparg);
+		break;
+	default:
+		ret = -ENOSYS;
+	}
+
+	if (!ret)
+		*oval = oldval;
+
+	return ret;
+#else
+	return futex_atomic_op_inuser_local(op, oparg, oval, uaddr);
+#endif
+}
+
+static inline int
+futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
+			      u32 oldval, u32 newval)
+{
+#if XCHAL_HAVE_S32C1I || XCHAL_HAVE_EXCLUSIVE
+	unsigned long tmp;
+	int ret = 0;
+
+	if (!access_ok(uaddr, sizeof(u32)))
+		return -EFAULT;
+
+	__asm__ __volatile__ (
+	"	# futex_atomic_cmpxchg_inatomic\n"
+#if XCHAL_HAVE_EXCLUSIVE
+	"1:	l32ex	%[tmp], %[addr]\n"
+	"	s32i	%[tmp], %[uval], 0\n"
+	"	bne	%[tmp], %[oldval], 2f\n"
+	"	mov	%[tmp], %[newval]\n"
+	"3:	s32ex	%[tmp], %[addr]\n"
+	"	getex	%[tmp]\n"
+	"	beqz	%[tmp], 1b\n"
+#elif XCHAL_HAVE_S32C1I
+	"	wsr	%[oldval], scompare1\n"
+	"1:	s32c1i	%[newval], %[addr], 0\n"
+	"	s32i	%[newval], %[uval], 0\n"
+#endif
+	"2:\n"
+	"	.section .fixup,\"ax\"\n"
+	"	.align 4\n"
+	"	.literal_position\n"
+	"4:	movi	%[tmp], 2b\n"
+	"	movi	%[ret], %[fault]\n"
+	"	jx	%[tmp]\n"
+	"	.previous\n"
+	"	.section __ex_table,\"a\"\n"
+	"	.long 1b, 4b\n"
+#if XCHAL_HAVE_EXCLUSIVE
+	"	.long 3b, 4b\n"
+#endif
+	"	.previous\n"
+	: [ret] "+r" (ret), [newval] "+r" (newval), [tmp] "=&r" (tmp)
+	: [addr] "r" (uaddr), [oldval] "r" (oldval), [uval] "r" (uval),
+	  [fault] "I" (-EFAULT)
+	: "memory");
+
+	return ret;
+#else
+	return futex_atomic_cmpxchg_inatomic_local(uval, uaddr, oldval, newval);
+#endif
+}
+
+#endif /* _ASM_XTENSA_FUTEX_H */
diff --git a/arch/xtensa/include/asm/highmem.h b/arch/xtensa/include/asm/highmem.h
new file mode 100644
index 000000000..34b8b620e
--- /dev/null
+++ b/arch/xtensa/include/asm/highmem.h
@@ -0,0 +1,84 @@
+/*
+ * include/asm-xtensa/highmem.h
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ *
+ * Copyright (C) 2003 - 2005 Tensilica Inc.
+ * Copyright (C) 2014 Cadence Design Systems Inc.
+ */
+
+#ifndef _XTENSA_HIGHMEM_H
+#define _XTENSA_HIGHMEM_H
+
+#ifdef CONFIG_HIGHMEM
+#include <linux/wait.h>
+#include <linux/pgtable.h>
+#include <asm/cacheflush.h>
+#include <asm/fixmap.h>
+
+#define PKMAP_BASE		((FIXADDR_START -			\
+				  (LAST_PKMAP + 1) * PAGE_SIZE) & PMD_MASK)
+#define LAST_PKMAP		(PTRS_PER_PTE * DCACHE_N_COLORS)
+#define LAST_PKMAP_MASK		(LAST_PKMAP - 1)
+#define PKMAP_NR(virt)		(((virt) - PKMAP_BASE) >> PAGE_SHIFT)
+#define PKMAP_ADDR(nr)		(PKMAP_BASE + ((nr) << PAGE_SHIFT))
+
+#define kmap_prot		PAGE_KERNEL_EXEC
+
+#if DCACHE_WAY_SIZE > PAGE_SIZE
+#define get_pkmap_color get_pkmap_color
+static inline int get_pkmap_color(struct page *page)
+{
+	return DCACHE_ALIAS(page_to_phys(page));
+}
+
+extern unsigned int last_pkmap_nr_arr[];
+
+static inline unsigned int get_next_pkmap_nr(unsigned int color)
+{
+	last_pkmap_nr_arr[color] =
+		(last_pkmap_nr_arr[color] + DCACHE_N_COLORS) & LAST_PKMAP_MASK;
+	return last_pkmap_nr_arr[color] + color;
+}
+
+static inline int no_more_pkmaps(unsigned int pkmap_nr, unsigned int color)
+{
+	return pkmap_nr < DCACHE_N_COLORS;
+}
+
+static inline int get_pkmap_entries_count(unsigned int color)
+{
+	return LAST_PKMAP / DCACHE_N_COLORS;
+}
+
+extern wait_queue_head_t pkmap_map_wait_arr[];
+
+static inline wait_queue_head_t *get_pkmap_wait_queue_head(unsigned int color)
+{
+	return pkmap_map_wait_arr + color;
+}
+
+enum fixed_addresses kmap_local_map_idx(int type, unsigned long pfn);
+#define arch_kmap_local_map_idx		kmap_local_map_idx
+
+enum fixed_addresses kmap_local_unmap_idx(int type, unsigned long addr);
+#define arch_kmap_local_unmap_idx	kmap_local_unmap_idx
+
+#endif
+
+extern pte_t *pkmap_page_table;
+
+static inline void flush_cache_kmaps(void)
+{
+	flush_cache_all();
+}
+
+#define arch_kmap_local_post_unmap(vaddr)	\
+	local_flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE)
+
+void kmap_init(void);
+
+#endif /* CONFIG_HIGHMEM */
+#endif
diff --git a/arch/xtensa/include/asm/hw_breakpoint.h b/arch/xtensa/include/asm/hw_breakpoint.h
new file mode 100644
index 000000000..9f119c1ca
--- /dev/null
+++ b/arch/xtensa/include/asm/hw_breakpoint.h
@@ -0,0 +1,61 @@
+/*
+ * Xtensa hardware breakpoints/watchpoints handling functions
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2016 Cadence Design Systems Inc.
+ */
+
+#ifndef __ASM_XTENSA_HW_BREAKPOINT_H
+#define __ASM_XTENSA_HW_BREAKPOINT_H
+
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+
+#include <linux/kdebug.h>
+#include <linux/types.h>
+#include <uapi/linux/hw_breakpoint.h>
+
+/* Breakpoint */
+#define XTENSA_BREAKPOINT_EXECUTE	0
+
+/* Watchpoints */
+#define XTENSA_BREAKPOINT_LOAD		1
+#define XTENSA_BREAKPOINT_STORE		2
+
+struct arch_hw_breakpoint {
+	unsigned long address;
+	u16 len;
+	u16 type;
+};
+
+struct perf_event_attr;
+struct perf_event;
+struct pt_regs;
+struct task_struct;
+
+int hw_breakpoint_slots(int type);
+int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
+int hw_breakpoint_arch_parse(struct perf_event *bp,
+			     const struct perf_event_attr *attr,
+			     struct arch_hw_breakpoint *hw);
+int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
+				    unsigned long val, void *data);
+
+int arch_install_hw_breakpoint(struct perf_event *bp);
+void arch_uninstall_hw_breakpoint(struct perf_event *bp);
+void hw_breakpoint_pmu_read(struct perf_event *bp);
+int check_hw_breakpoint(struct pt_regs *regs);
+void clear_ptrace_hw_breakpoint(struct task_struct *tsk);
+
+#else
+
+struct task_struct;
+
+static inline void clear_ptrace_hw_breakpoint(struct task_struct *tsk)
+{
+}
+
+#endif /* CONFIG_HAVE_HW_BREAKPOINT */
+#endif /* __ASM_XTENSA_HW_BREAKPOINT_H */
diff --git a/arch/xtensa/include/asm/initialize_mmu.h b/arch/xtensa/include/asm/initialize_mmu.h
new file mode 100644
index 000000000..9793b49fc
--- /dev/null
+++ b/arch/xtensa/include/asm/initialize_mmu.h
@@ -0,0 +1,245 @@
+/*
+ * arch/xtensa/include/asm/initialize_mmu.h
+ *
+ * Initializes MMU:
+ *
+ *      For the new V3 MMU we remap the TLB from virtual == physical
+ *      to the standard Linux mapping used in earlier MMU's.
+ *
+ *      For the MMU we also support a new configuration register that
+ *      specifies how the S32C1I instruction operates with the cache
+ *      controller.
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ *
+ * Copyright (C) 2008 - 2012 Tensilica, Inc.
+ *
+ *   Marc Gauthier <marc@tensilica.com>
+ *   Pete Delaney <piet@tensilica.com>
+ */
+
+#ifndef _XTENSA_INITIALIZE_MMU_H
+#define _XTENSA_INITIALIZE_MMU_H
+
+#include <linux/init.h>
+#include <linux/pgtable.h>
+#include <asm/vectors.h>
+
+#if XCHAL_HAVE_PTP_MMU
+#define CA_BYPASS	(_PAGE_CA_BYPASS | _PAGE_HW_WRITE | _PAGE_HW_EXEC)
+#define CA_WRITEBACK	(_PAGE_CA_WB     | _PAGE_HW_WRITE | _PAGE_HW_EXEC)
+#else
+#define CA_WRITEBACK	(0x4)
+#endif
+
+#ifdef __ASSEMBLY__
+
+#define XTENSA_HWVERSION_RC_2009_0 230000
+
+	.macro	initialize_mmu
+
+#if XCHAL_HAVE_S32C1I && (XCHAL_HW_MIN_VERSION >= XTENSA_HWVERSION_RC_2009_0)
+/*
+ * We Have Atomic Operation Control (ATOMCTL) Register; Initialize it.
+ * For details see Documentation/xtensa/atomctl.rst
+ */
+#if XCHAL_DCACHE_IS_COHERENT
+	movi	a3, 0x25	/* For SMP/MX -- internal for writeback,
+				 * RCW otherwise
+				 */
+#else
+	movi	a3, 0x29	/* non-MX -- Most cores use Std Memory
+				 * Controlers which usually can't use RCW
+				 */
+#endif
+	wsr	a3, atomctl
+#endif  /* XCHAL_HAVE_S32C1I &&
+	 * (XCHAL_HW_MIN_VERSION >= XTENSA_HWVERSION_RC_2009_0)
+	 */
+
+#if defined(CONFIG_MMU) && XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
+/*
+ * Have MMU v3
+ */
+
+#if !XCHAL_HAVE_VECBASE
+# error "MMU v3 requires reloc vectors"
+#endif
+
+	movi	a1, 0
+	_call0	1f
+	_j	2f
+
+	.align	4
+1:
+
+#if CONFIG_KERNEL_LOAD_ADDRESS < 0x40000000ul
+#define TEMP_MAPPING_VADDR 0x40000000
+#else
+#define TEMP_MAPPING_VADDR 0x00000000
+#endif
+
+	/* Step 1: invalidate mapping at 0x40000000..0x5FFFFFFF. */
+
+	movi	a2, TEMP_MAPPING_VADDR | XCHAL_SPANNING_WAY
+	idtlb	a2
+	iitlb	a2
+	isync
+
+	/* Step 2: map 0x40000000..0x47FFFFFF to paddr containing this code
+	 * and jump to the new mapping.
+	 */
+
+	srli	a3, a0, 27
+	slli	a3, a3, 27
+	addi	a3, a3, CA_BYPASS
+	addi	a7, a2, 5 - XCHAL_SPANNING_WAY
+	wdtlb	a3, a7
+	witlb	a3, a7
+	isync
+
+	slli	a4, a0, 5
+	srli	a4, a4, 5
+	addi	a5, a2, -XCHAL_SPANNING_WAY
+	add	a4, a4, a5
+	jx	a4
+
+	/* Step 3: unmap everything other than current area.
+	 *	   Start at 0x60000000, wrap around, and end with 0x20000000
+	 */
+2:	movi	a4, 0x20000000
+	add	a5, a2, a4
+3:	idtlb	a5
+	iitlb	a5
+	add	a5, a5, a4
+	bne	a5, a2, 3b
+
+	/* Step 4: Setup MMU with the requested static mappings. */
+
+	movi	a6, 0x01000000
+	wsr	a6, ITLBCFG
+	wsr	a6, DTLBCFG
+	isync
+
+	movi	a5, XCHAL_KSEG_CACHED_VADDR + XCHAL_KSEG_TLB_WAY
+	movi	a4, XCHAL_KSEG_PADDR + CA_WRITEBACK
+	wdtlb	a4, a5
+	witlb	a4, a5
+
+	movi	a5, XCHAL_KSEG_BYPASS_VADDR + XCHAL_KSEG_TLB_WAY
+	movi	a4, XCHAL_KSEG_PADDR + CA_BYPASS
+	wdtlb	a4, a5
+	witlb	a4, a5
+
+#ifdef CONFIG_XTENSA_KSEG_512M
+	movi	a5, XCHAL_KSEG_CACHED_VADDR + 0x10000000 + XCHAL_KSEG_TLB_WAY
+	movi	a4, XCHAL_KSEG_PADDR + 0x10000000 + CA_WRITEBACK
+	wdtlb	a4, a5
+	witlb	a4, a5
+
+	movi	a5, XCHAL_KSEG_BYPASS_VADDR + 0x10000000 + XCHAL_KSEG_TLB_WAY
+	movi	a4, XCHAL_KSEG_PADDR + 0x10000000 + CA_BYPASS
+	wdtlb	a4, a5
+	witlb	a4, a5
+#endif
+
+	movi	a5, XCHAL_KIO_CACHED_VADDR + XCHAL_KIO_TLB_WAY
+	movi	a4, XCHAL_KIO_DEFAULT_PADDR + CA_WRITEBACK
+	wdtlb	a4, a5
+	witlb	a4, a5
+
+	movi	a5, XCHAL_KIO_BYPASS_VADDR + XCHAL_KIO_TLB_WAY
+	movi	a4, XCHAL_KIO_DEFAULT_PADDR + CA_BYPASS
+	wdtlb	a4, a5
+	witlb	a4, a5
+
+	isync
+
+	/* Jump to self, using final mappings. */
+	movi	a4, 1f
+	jx	a4
+
+1:
+	/* Step 5: remove temporary mapping. */
+	idtlb	a7
+	iitlb	a7
+	isync
+
+	movi	a0, 0
+	wsr	a0, ptevaddr
+	rsync
+
+#endif /* defined(CONFIG_MMU) && XCHAL_HAVE_PTP_MMU &&
+	  XCHAL_HAVE_SPANNING_WAY */
+
+	.endm
+
+	.macro	initialize_cacheattr
+
+#if !defined(CONFIG_MMU) && (XCHAL_HAVE_TLBS || XCHAL_HAVE_MPU)
+#if CONFIG_MEMMAP_CACHEATTR == 0x22222222 && XCHAL_HAVE_PTP_MMU
+#error Default MEMMAP_CACHEATTR of 0x22222222 does not work with full MMU.
+#endif
+
+#if XCHAL_HAVE_MPU
+	__REFCONST
+	.align	4
+.Lattribute_table:
+	.long 0x000000, 0x1fff00, 0x1ddf00, 0x1eef00
+	.long 0x006600, 0x000000, 0x000000, 0x000000
+	.long 0x000000, 0x000000, 0x000000, 0x000000
+	.long 0x000000, 0x000000, 0x000000, 0x000000
+	.previous
+
+	movi	a3, .Lattribute_table
+	movi	a4, CONFIG_MEMMAP_CACHEATTR
+	movi	a5, 1
+	movi	a6, XCHAL_MPU_ENTRIES
+	movi	a10, 0x20000000
+	movi	a11, -1
+1:
+	sub	a5, a5, a10
+	extui	a8, a4, 28, 4
+	beq	a8, a11, 2f
+	addi	a6, a6, -1
+	mov	a11, a8
+2:
+	addx4	a9, a8, a3
+	l32i	a9, a9, 0
+	or	a9, a9, a6
+	wptlb	a9, a5
+	slli	a4, a4, 4
+	bgeu	a5, a10, 1b
+
+#else
+	movi	a5, XCHAL_SPANNING_WAY
+	movi	a6, ~_PAGE_ATTRIB_MASK
+	movi	a4, CONFIG_MEMMAP_CACHEATTR
+	movi	a8, 0x20000000
+1:
+	rdtlb1	a3, a5
+	xor	a3, a3, a4
+	and	a3, a3, a6
+	xor	a3, a3, a4
+	wdtlb	a3, a5
+	ritlb1	a3, a5
+	xor	a3, a3, a4
+	and	a3, a3, a6
+	xor	a3, a3, a4
+	witlb	a3, a5
+
+	add	a5, a5, a8
+	srli	a4, a4, 4
+	bgeu	a5, a8, 1b
+
+	isync
+#endif
+#endif
+
+	.endm
+
+#endif /*__ASSEMBLY__*/
+
+#endif /* _XTENSA_INITIALIZE_MMU_H */
diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h
new file mode 100644
index 000000000..a5b707e1c
--- /dev/null
+++ b/arch/xtensa/include/asm/io.h
@@ -0,0 +1,70 @@
+/*
+ * include/asm-xtensa/io.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_IO_H
+#define _XTENSA_IO_H
+
+#include <asm/byteorder.h>
+#include <asm/page.h>
+#include <asm/vectors.h>
+#include <linux/bug.h>
+#include <linux/kernel.h>
+
+#include <linux/types.h>
+
+#define IOADDR(x)		(XCHAL_KIO_BYPASS_VADDR + (x))
+#define IO_SPACE_LIMIT ~0
+#define PCI_IOBASE		((void __iomem *)XCHAL_KIO_BYPASS_VADDR)
+
+#ifdef CONFIG_MMU
+
+void __iomem *xtensa_ioremap_nocache(unsigned long addr, unsigned long size);
+void __iomem *xtensa_ioremap_cache(unsigned long addr, unsigned long size);
+void xtensa_iounmap(volatile void __iomem *addr);
+
+/*
+ * Return the virtual address for the specified bus memory.
+ */
+static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
+{
+	if (offset >= XCHAL_KIO_PADDR
+	    && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
+		return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR);
+	else
+		return xtensa_ioremap_nocache(offset, size);
+}
+
+static inline void __iomem *ioremap_cache(unsigned long offset,
+		unsigned long size)
+{
+	if (offset >= XCHAL_KIO_PADDR
+	    && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
+		return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR);
+	else
+		return xtensa_ioremap_cache(offset, size);
+}
+#define ioremap_cache ioremap_cache
+
+static inline void iounmap(volatile void __iomem *addr)
+{
+	unsigned long va = (unsigned long) addr;
+
+	if (!(va >= XCHAL_KIO_CACHED_VADDR &&
+	      va - XCHAL_KIO_CACHED_VADDR < XCHAL_KIO_SIZE) &&
+	    !(va >= XCHAL_KIO_BYPASS_VADDR &&
+	      va - XCHAL_KIO_BYPASS_VADDR < XCHAL_KIO_SIZE))
+		xtensa_iounmap(addr);
+}
+
+#endif /* CONFIG_MMU */
+
+#include <asm-generic/io.h>
+
+#endif	/* _XTENSA_IO_H */
diff --git a/arch/xtensa/include/asm/irq.h b/arch/xtensa/include/asm/irq.h
new file mode 100644
index 000000000..0f71a51da
--- /dev/null
+++ b/arch/xtensa/include/asm/irq.h
@@ -0,0 +1,42 @@
+/*
+ * include/asm-xtensa/irq.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_IRQ_H
+#define _XTENSA_IRQ_H
+
+#include <linux/init.h>
+#include <asm/core.h>
+
+#ifdef CONFIG_PLATFORM_NR_IRQS
+# define PLATFORM_NR_IRQS CONFIG_PLATFORM_NR_IRQS
+#else
+# define PLATFORM_NR_IRQS 0
+#endif
+#define XTENSA_NR_IRQS XCHAL_NUM_INTERRUPTS
+#define NR_IRQS (XTENSA_NR_IRQS + PLATFORM_NR_IRQS + 1)
+#define XTENSA_PIC_LINUX_IRQ(hwirq) ((hwirq) + 1)
+
+static __inline__ int irq_canonicalize(int irq)
+{
+	return (irq);
+}
+
+struct irqaction;
+struct irq_domain;
+
+void migrate_irqs(void);
+int xtensa_irq_domain_xlate(const u32 *intspec, unsigned int intsize,
+		unsigned long int_irq, unsigned long ext_irq,
+		unsigned long *out_hwirq, unsigned int *out_type);
+int xtensa_irq_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw);
+unsigned xtensa_map_ext_irq(unsigned ext_irq);
+unsigned xtensa_get_ext_irq_no(unsigned irq);
+
+#endif	/* _XTENSA_IRQ_H */
diff --git a/arch/xtensa/include/asm/irqflags.h b/arch/xtensa/include/asm/irqflags.h
new file mode 100644
index 000000000..128906815
--- /dev/null
+++ b/arch/xtensa/include/asm/irqflags.h
@@ -0,0 +1,83 @@
+/*
+ * Xtensa IRQ flags handling functions
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ * Copyright (C) 2015 Cadence Design Systems Inc.
+ */
+
+#ifndef _XTENSA_IRQFLAGS_H
+#define _XTENSA_IRQFLAGS_H
+
+#include <linux/stringify.h>
+#include <linux/types.h>
+#include <asm/processor.h>
+
+static inline unsigned long arch_local_save_flags(void)
+{
+	unsigned long flags;
+	asm volatile("rsr %0, ps" : "=a" (flags));
+	return flags;
+}
+
+static inline unsigned long arch_local_irq_save(void)
+{
+	unsigned long flags;
+#if XTENSA_FAKE_NMI
+#if defined(CONFIG_DEBUG_MISC) && (LOCKLEVEL | TOPLEVEL) >= XCHAL_DEBUGLEVEL
+	unsigned long tmp;
+
+	asm volatile("rsr	%0, ps\t\n"
+		     "extui	%1, %0, 0, 4\t\n"
+		     "bgei	%1, "__stringify(LOCKLEVEL)", 1f\t\n"
+		     "rsil	%0, "__stringify(LOCKLEVEL)"\n"
+		     "1:"
+		     : "=a" (flags), "=a" (tmp) :: "memory");
+#else
+	asm volatile("rsr	%0, ps\t\n"
+		     "or	%0, %0, %1\t\n"
+		     "xsr	%0, ps\t\n"
+		     "rsync"
+		     : "=&a" (flags) : "a" (LOCKLEVEL) : "memory");
+#endif
+#else
+	asm volatile("rsil	%0, "__stringify(LOCKLEVEL)
+		     : "=a" (flags) :: "memory");
+#endif
+	return flags;
+}
+
+static inline void arch_local_irq_disable(void)
+{
+	arch_local_irq_save();
+}
+
+static inline void arch_local_irq_enable(void)
+{
+	unsigned long flags;
+	asm volatile("rsil %0, 0" : "=a" (flags) :: "memory");
+}
+
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+	asm volatile("wsr %0, ps; rsync"
+		     :: "a" (flags) : "memory");
+}
+
+static inline bool arch_irqs_disabled_flags(unsigned long flags)
+{
+#if XCHAL_EXCM_LEVEL < LOCKLEVEL || (1 << PS_EXCM_BIT) < LOCKLEVEL
+#error "XCHAL_EXCM_LEVEL and 1<<PS_EXCM_BIT must be no less than LOCKLEVEL"
+#endif
+	return (flags & (PS_INTLEVEL_MASK | (1 << PS_EXCM_BIT))) >= LOCKLEVEL;
+}
+
+static inline bool arch_irqs_disabled(void)
+{
+	return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+#endif /* _XTENSA_IRQFLAGS_H */
diff --git a/arch/xtensa/include/asm/jump_label.h b/arch/xtensa/include/asm/jump_label.h
new file mode 100644
index 000000000..c812bf850
--- /dev/null
+++ b/arch/xtensa/include/asm/jump_label.h
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2018 Cadence Design Systems Inc. */
+
+#ifndef _ASM_XTENSA_JUMP_LABEL_H
+#define _ASM_XTENSA_JUMP_LABEL_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/types.h>
+
+#define JUMP_LABEL_NOP_SIZE 3
+
+static __always_inline bool arch_static_branch(struct static_key *key,
+					       bool branch)
+{
+	asm_volatile_goto("1:\n\t"
+			  "_nop\n\t"
+			  ".pushsection __jump_table,  \"aw\"\n\t"
+			  ".word 1b, %l[l_yes], %c0\n\t"
+			  ".popsection\n\t"
+			  : :  "i" (&((char *)key)[branch]) :  : l_yes);
+
+	return false;
+l_yes:
+	return true;
+}
+
+static __always_inline bool arch_static_branch_jump(struct static_key *key,
+						    bool branch)
+{
+	/*
+	 * Xtensa assembler will mark certain points in the code
+	 * as unreachable, so that later assembler or linker relaxation
+	 * passes could use them. A spot right after the J instruction
+	 * is one such point. Assembler and/or linker may insert padding
+	 * or literals here, breaking code flow in case the J instruction
+	 * is later replaced with NOP. Put a label right after the J to
+	 * make it reachable and wrap both into a no-transform block
+	 * to avoid any assembler interference with this.
+	 */
+	asm_volatile_goto("1:\n\t"
+			  ".begin no-transform\n\t"
+			  "_j %l[l_yes]\n\t"
+			  "2:\n\t"
+			  ".end no-transform\n\t"
+			  ".pushsection __jump_table,  \"aw\"\n\t"
+			  ".word 1b, %l[l_yes], %c0\n\t"
+			  ".popsection\n\t"
+			  : :  "i" (&((char *)key)[branch]) :  : l_yes);
+
+	return false;
+l_yes:
+	return true;
+}
+
+typedef u32 jump_label_t;
+
+struct jump_entry {
+	jump_label_t code;
+	jump_label_t target;
+	jump_label_t key;
+};
+
+#endif  /* __ASSEMBLY__ */
+#endif
diff --git a/arch/xtensa/include/asm/kasan.h b/arch/xtensa/include/asm/kasan.h
new file mode 100644
index 000000000..216b6f32c
--- /dev/null
+++ b/arch/xtensa/include/asm/kasan.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_KASAN_H
+#define __ASM_KASAN_H
+
+#ifndef __ASSEMBLY__
+
+#ifdef CONFIG_KASAN
+
+#include <linux/kernel.h>
+#include <linux/sizes.h>
+#include <asm/kmem_layout.h>
+
+#define KASAN_SHADOW_SCALE_SHIFT 3
+
+/* Start of area covered by KASAN */
+#define KASAN_START_VADDR __XTENSA_UL_CONST(0x90000000)
+/* Start of the shadow map */
+#define KASAN_SHADOW_START (XCHAL_PAGE_TABLE_VADDR + XCHAL_PAGE_TABLE_SIZE)
+/* Size of the shadow map */
+#define KASAN_SHADOW_SIZE (-KASAN_START_VADDR >> KASAN_SHADOW_SCALE_SHIFT)
+/* Offset for mem to shadow address transformation */
+#define KASAN_SHADOW_OFFSET __XTENSA_UL_CONST(CONFIG_KASAN_SHADOW_OFFSET)
+
+void __init kasan_early_init(void);
+void __init kasan_init(void);
+
+#else
+
+static inline void kasan_early_init(void)
+{
+}
+
+static inline void kasan_init(void)
+{
+}
+
+#endif
+#endif
+#endif
diff --git a/arch/xtensa/include/asm/kmem_layout.h b/arch/xtensa/include/asm/kmem_layout.h
new file mode 100644
index 000000000..6fc05cba6
--- /dev/null
+++ b/arch/xtensa/include/asm/kmem_layout.h
@@ -0,0 +1,104 @@
+/*
+ * Kernel virtual memory layout definitions.
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ *
+ * Copyright (C) 2016 Cadence Design Systems Inc.
+ */
+
+#ifndef _XTENSA_KMEM_LAYOUT_H
+#define _XTENSA_KMEM_LAYOUT_H
+
+#include <asm/core.h>
+#include <asm/types.h>
+
+#ifdef CONFIG_MMU
+
+/*
+ * Fixed TLB translations in the processor.
+ */
+
+#define XCHAL_PAGE_TABLE_VADDR	__XTENSA_UL_CONST(0x80000000)
+#define XCHAL_PAGE_TABLE_SIZE	__XTENSA_UL_CONST(0x00400000)
+
+#if defined(CONFIG_XTENSA_KSEG_MMU_V2)
+
+#define XCHAL_KSEG_CACHED_VADDR	__XTENSA_UL_CONST(0xd0000000)
+#define XCHAL_KSEG_BYPASS_VADDR	__XTENSA_UL_CONST(0xd8000000)
+#define XCHAL_KSEG_SIZE		__XTENSA_UL_CONST(0x08000000)
+#define XCHAL_KSEG_ALIGNMENT	__XTENSA_UL_CONST(0x08000000)
+#define XCHAL_KSEG_TLB_WAY	5
+#define XCHAL_KIO_TLB_WAY	6
+
+#elif defined(CONFIG_XTENSA_KSEG_256M)
+
+#define XCHAL_KSEG_CACHED_VADDR	__XTENSA_UL_CONST(0xb0000000)
+#define XCHAL_KSEG_BYPASS_VADDR	__XTENSA_UL_CONST(0xc0000000)
+#define XCHAL_KSEG_SIZE		__XTENSA_UL_CONST(0x10000000)
+#define XCHAL_KSEG_ALIGNMENT	__XTENSA_UL_CONST(0x10000000)
+#define XCHAL_KSEG_TLB_WAY	6
+#define XCHAL_KIO_TLB_WAY	6
+
+#elif defined(CONFIG_XTENSA_KSEG_512M)
+
+#define XCHAL_KSEG_CACHED_VADDR	__XTENSA_UL_CONST(0xa0000000)
+#define XCHAL_KSEG_BYPASS_VADDR	__XTENSA_UL_CONST(0xc0000000)
+#define XCHAL_KSEG_SIZE		__XTENSA_UL_CONST(0x20000000)
+#define XCHAL_KSEG_ALIGNMENT	__XTENSA_UL_CONST(0x10000000)
+#define XCHAL_KSEG_TLB_WAY	6
+#define XCHAL_KIO_TLB_WAY	6
+
+#else
+#error Unsupported KSEG configuration
+#endif
+
+#ifdef CONFIG_KSEG_PADDR
+#define XCHAL_KSEG_PADDR        __XTENSA_UL_CONST(CONFIG_KSEG_PADDR)
+#else
+#define XCHAL_KSEG_PADDR	__XTENSA_UL_CONST(0x00000000)
+#endif
+
+#if XCHAL_KSEG_PADDR & (XCHAL_KSEG_ALIGNMENT - 1)
+#error XCHAL_KSEG_PADDR is not properly aligned to XCHAL_KSEG_ALIGNMENT
+#endif
+
+#endif
+
+/* KIO definition */
+
+#if XCHAL_HAVE_PTP_MMU
+#define XCHAL_KIO_CACHED_VADDR		0xe0000000
+#define XCHAL_KIO_BYPASS_VADDR		0xf0000000
+#define XCHAL_KIO_DEFAULT_PADDR		0xf0000000
+#else
+#define XCHAL_KIO_BYPASS_VADDR		XCHAL_KIO_PADDR
+#define XCHAL_KIO_DEFAULT_PADDR		0x90000000
+#endif
+#define XCHAL_KIO_SIZE			0x10000000
+
+#if (!XCHAL_HAVE_PTP_MMU || XCHAL_HAVE_SPANNING_WAY) && defined(CONFIG_USE_OF)
+#define XCHAL_KIO_PADDR			xtensa_get_kio_paddr()
+#ifndef __ASSEMBLY__
+extern unsigned long xtensa_kio_paddr;
+
+static inline unsigned long xtensa_get_kio_paddr(void)
+{
+	return xtensa_kio_paddr;
+}
+#endif
+#else
+#define XCHAL_KIO_PADDR			XCHAL_KIO_DEFAULT_PADDR
+#endif
+
+/* KERNEL_STACK definition */
+
+#ifndef CONFIG_KASAN
+#define KERNEL_STACK_SHIFT	13
+#else
+#define KERNEL_STACK_SHIFT	15
+#endif
+#define KERNEL_STACK_SIZE	(1 << KERNEL_STACK_SHIFT)
+
+#endif
diff --git a/arch/xtensa/include/asm/linkage.h b/arch/xtensa/include/asm/linkage.h
new file mode 100644
index 000000000..0ba997323
--- /dev/null
+++ b/arch/xtensa/include/asm/linkage.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ASM_LINKAGE_H
+#define __ASM_LINKAGE_H
+
+#define __ALIGN		.align 4
+#define __ALIGN_STR	".align 4"
+
+#endif
diff --git a/arch/xtensa/include/asm/mmu.h b/arch/xtensa/include/asm/mmu.h
new file mode 100644
index 000000000..71afe418d
--- /dev/null
+++ b/arch/xtensa/include/asm/mmu.h
@@ -0,0 +1,22 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2013 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_MMU_H
+#define _XTENSA_MMU_H
+
+#ifndef CONFIG_MMU
+#include <asm-generic/mmu.h>
+#else
+
+typedef struct {
+	unsigned long asid[NR_CPUS];
+	unsigned int cpu;
+} mm_context_t;
+
+#endif /* CONFIG_MMU */
+#endif	/* _XTENSA_MMU_H */
diff --git a/arch/xtensa/include/asm/mmu_context.h b/arch/xtensa/include/asm/mmu_context.h
new file mode 100644
index 000000000..e337ba968
--- /dev/null
+++ b/arch/xtensa/include/asm/mmu_context.h
@@ -0,0 +1,154 @@
+/*
+ * Switch an MMU context.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2013 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_MMU_CONTEXT_H
+#define _XTENSA_MMU_CONTEXT_H
+
+#ifndef CONFIG_MMU
+#include <asm/nommu_context.h>
+#else
+
+#include <linux/stringify.h>
+#include <linux/sched.h>
+#include <linux/mm_types.h>
+#include <linux/pgtable.h>
+
+#include <asm/vectors.h>
+
+#include <asm/cacheflush.h>
+#include <asm/tlbflush.h>
+#include <asm-generic/mm_hooks.h>
+#include <asm-generic/percpu.h>
+
+#if (XCHAL_HAVE_TLBS != 1)
+# error "Linux must have an MMU!"
+#endif
+
+DECLARE_PER_CPU(unsigned long, asid_cache);
+#define cpu_asid_cache(cpu) per_cpu(asid_cache, cpu)
+
+/*
+ * NO_CONTEXT is the invalid ASID value that we don't ever assign to
+ * any user or kernel context.  We use the reserved values in the
+ * ASID_INSERT macro below.
+ *
+ * 0 invalid
+ * 1 kernel
+ * 2 reserved
+ * 3 reserved
+ * 4...255 available
+ */
+
+#define NO_CONTEXT	0
+#define ASID_USER_FIRST	4
+#define ASID_MASK	((1 << XCHAL_MMU_ASID_BITS) - 1)
+#define ASID_INSERT(x)	(0x03020001 | (((x) & ASID_MASK) << 8))
+
+void init_mmu(void);
+void init_kio(void);
+
+static inline void set_rasid_register (unsigned long val)
+{
+	__asm__ __volatile__ (" wsr %0, rasid\n\t"
+			      " isync\n" : : "a" (val));
+}
+
+static inline unsigned long get_rasid_register (void)
+{
+	unsigned long tmp;
+	__asm__ __volatile__ (" rsr %0, rasid\n\t" : "=a" (tmp));
+	return tmp;
+}
+
+static inline void get_new_mmu_context(struct mm_struct *mm, unsigned int cpu)
+{
+	unsigned long asid = cpu_asid_cache(cpu);
+	if ((++asid & ASID_MASK) == 0) {
+		/*
+		 * Start new asid cycle; continue counting with next
+		 * incarnation bits; skipping over 0, 1, 2, 3.
+		 */
+		local_flush_tlb_all();
+		asid += ASID_USER_FIRST;
+	}
+	cpu_asid_cache(cpu) = asid;
+	mm->context.asid[cpu] = asid;
+	mm->context.cpu = cpu;
+}
+
+static inline void get_mmu_context(struct mm_struct *mm, unsigned int cpu)
+{
+	/*
+	 * Check if our ASID is of an older version and thus invalid.
+	 */
+
+	if (mm) {
+		unsigned long asid = mm->context.asid[cpu];
+
+		if (asid == NO_CONTEXT ||
+				((asid ^ cpu_asid_cache(cpu)) & ~ASID_MASK))
+			get_new_mmu_context(mm, cpu);
+	}
+}
+
+static inline void activate_context(struct mm_struct *mm, unsigned int cpu)
+{
+	get_mmu_context(mm, cpu);
+	set_rasid_register(ASID_INSERT(mm->context.asid[cpu]));
+	invalidate_page_directory();
+}
+
+/*
+ * Initialize the context related info for a new mm_struct
+ * instance.  Valid cpu values are 0..(NR_CPUS-1), so initializing
+ * to -1 says the process has never run on any core.
+ */
+
+#define init_new_context init_new_context
+static inline int init_new_context(struct task_struct *tsk,
+		struct mm_struct *mm)
+{
+	int cpu;
+	for_each_possible_cpu(cpu) {
+		mm->context.asid[cpu] = NO_CONTEXT;
+	}
+	mm->context.cpu = -1;
+	return 0;
+}
+
+static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
+			     struct task_struct *tsk)
+{
+	unsigned int cpu = smp_processor_id();
+	int migrated = next->context.cpu != cpu;
+	/* Flush the icache if we migrated to a new core. */
+	if (migrated) {
+		__invalidate_icache_all();
+		next->context.cpu = cpu;
+	}
+	if (migrated || prev != next)
+		activate_context(next, cpu);
+}
+
+/*
+ * Destroy context related info for an mm_struct that is about
+ * to be put to rest.
+ */
+#define destroy_context destroy_context
+static inline void destroy_context(struct mm_struct *mm)
+{
+	invalidate_page_directory();
+}
+
+
+#include <asm-generic/mmu_context.h>
+
+#endif /* CONFIG_MMU */
+#endif /* _XTENSA_MMU_CONTEXT_H */
diff --git a/arch/xtensa/include/asm/mxregs.h b/arch/xtensa/include/asm/mxregs.h
new file mode 100644
index 000000000..73dcc5456
--- /dev/null
+++ b/arch/xtensa/include/asm/mxregs.h
@@ -0,0 +1,46 @@
+/*
+ * Xtensa MX interrupt distributor
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2008 - 2013 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_MXREGS_H
+#define _XTENSA_MXREGS_H
+
+/*
+ * RER/WER at, as	Read/write external register
+ *	at: value
+ *	as: address
+ *
+ * Address	Value
+ * 00nn		0...0p..p	Interrupt Routing, route IRQ n to processor p
+ * 01pp		0...0d..d	16 bits (d) 'ored' as single IPI to processor p
+ * 0180		0...0m..m	Clear enable specified by mask (m)
+ * 0184		0...0m..m	Set enable specified by mask (m)
+ * 0190		0...0x..x	8-bit IPI partition register
+ *				VVVVVVVVPPPPUUUUUUUUUUUUUUUUU
+ *				V (10-bit) Release/Version
+ *				P ( 4-bit) Number of cores - 1
+ *				U (18-bit) ID
+ * 01a0		i.......i	32-bit ConfigID
+ * 0200		0...0m..m	RunStall core 'n'
+ * 0220		c		Cache coherency enabled
+ */
+
+#define MIROUT(irq)	(0x000 + (irq))
+#define MIPICAUSE(cpu)	(0x100 + (cpu))
+#define MIPISET(cause)	(0x140 + (cause))
+#define MIENG		0x180
+#define MIENGSET	0x184
+#define MIASG		0x188	/* Read Global Assert Register */
+#define MIASGSET	0x18c	/* Set Global Addert Regiter */
+#define MIPIPART	0x190
+#define SYSCFGID	0x1a0
+#define MPSCORE		0x200
+#define CCON		0x220
+
+#endif /* _XTENSA_MXREGS_H */
diff --git a/arch/xtensa/include/asm/nommu_context.h b/arch/xtensa/include/asm/nommu_context.h
new file mode 100644
index 000000000..7c9d1918d
--- /dev/null
+++ b/arch/xtensa/include/asm/nommu_context.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+static inline void init_mmu(void)
+{
+}
+
+static inline void init_kio(void)
+{
+}
+
+#include <asm-generic/nommu_context.h>
diff --git a/arch/xtensa/include/asm/page.h b/arch/xtensa/include/asm/page.h
new file mode 100644
index 000000000..493eb7083
--- /dev/null
+++ b/arch/xtensa/include/asm/page.h
@@ -0,0 +1,203 @@
+/*
+ * include/asm-xtensa/page.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version2 as
+ * published by the Free Software Foundation.
+ *
+ * Copyright (C) 2001 - 2007 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_PAGE_H
+#define _XTENSA_PAGE_H
+
+#include <asm/processor.h>
+#include <asm/types.h>
+#include <asm/cache.h>
+#include <asm/kmem_layout.h>
+
+/*
+ * PAGE_SHIFT determines the page size
+ */
+
+#define PAGE_SHIFT	12
+#define PAGE_SIZE	(__XTENSA_UL_CONST(1) << PAGE_SHIFT)
+#define PAGE_MASK	(~(PAGE_SIZE-1))
+
+#ifdef CONFIG_MMU
+#define PAGE_OFFSET	XCHAL_KSEG_CACHED_VADDR
+#define PHYS_OFFSET	XCHAL_KSEG_PADDR
+#define MAX_LOW_PFN	(PHYS_PFN(XCHAL_KSEG_PADDR) + \
+			 PHYS_PFN(XCHAL_KSEG_SIZE))
+#else
+#define PAGE_OFFSET	_AC(CONFIG_DEFAULT_MEM_START, UL)
+#define PHYS_OFFSET	_AC(CONFIG_DEFAULT_MEM_START, UL)
+#define MAX_LOW_PFN	PHYS_PFN(0xfffffffful)
+#endif
+
+/*
+ * Cache aliasing:
+ *
+ * If the cache size for one way is greater than the page size, we have to
+ * deal with cache aliasing. The cache index is wider than the page size:
+ *
+ * |    |cache| cache index
+ * | pfn  |off|	virtual address
+ * |xxxx:X|zzz|
+ * |    : |   |
+ * | \  / |   |
+ * |trans.|   |
+ * | /  \ |   |
+ * |yyyy:Y|zzz|	physical address
+ *
+ * When the page number is translated to the physical page address, the lowest
+ * bit(s) (X) that are part of the cache index are also translated (Y).
+ * If this translation changes bit(s) (X), the cache index is also afected,
+ * thus resulting in a different cache line than before.
+ * The kernel does not provide a mechanism to ensure that the page color
+ * (represented by this bit) remains the same when allocated or when pages
+ * are remapped. When user pages are mapped into kernel space, the color of
+ * the page might also change.
+ *
+ * We use the address space VMALLOC_END ... VMALLOC_END + DCACHE_WAY_SIZE * 2
+ * to temporarily map a patch so we can match the color.
+ */
+
+#if DCACHE_WAY_SIZE > PAGE_SIZE
+# define DCACHE_ALIAS_ORDER	(DCACHE_WAY_SHIFT - PAGE_SHIFT)
+# define DCACHE_ALIAS_MASK	(PAGE_MASK & (DCACHE_WAY_SIZE - 1))
+# define DCACHE_ALIAS(a)	(((a) & DCACHE_ALIAS_MASK) >> PAGE_SHIFT)
+# define DCACHE_ALIAS_EQ(a,b)	((((a) ^ (b)) & DCACHE_ALIAS_MASK) == 0)
+#else
+# define DCACHE_ALIAS_ORDER	0
+# define DCACHE_ALIAS(a)	((void)(a), 0)
+#endif
+#define DCACHE_N_COLORS		(1 << DCACHE_ALIAS_ORDER)
+
+#if ICACHE_WAY_SIZE > PAGE_SIZE
+# define ICACHE_ALIAS_ORDER	(ICACHE_WAY_SHIFT - PAGE_SHIFT)
+# define ICACHE_ALIAS_MASK	(PAGE_MASK & (ICACHE_WAY_SIZE - 1))
+# define ICACHE_ALIAS(a)	(((a) & ICACHE_ALIAS_MASK) >> PAGE_SHIFT)
+# define ICACHE_ALIAS_EQ(a,b)	((((a) ^ (b)) & ICACHE_ALIAS_MASK) == 0)
+#else
+# define ICACHE_ALIAS_ORDER	0
+#endif
+
+
+#ifdef __ASSEMBLY__
+
+#define __pgprot(x)	(x)
+
+#else
+
+/*
+ * These are used to make use of C type-checking..
+ */
+
+typedef struct { unsigned long pte; } pte_t;		/* page table entry */
+typedef struct { unsigned long pgd; } pgd_t;		/* PGD table entry */
+typedef struct { unsigned long pgprot; } pgprot_t;
+typedef struct page *pgtable_t;
+
+#define pte_val(x)	((x).pte)
+#define pgd_val(x)	((x).pgd)
+#define pgprot_val(x)	((x).pgprot)
+
+#define __pte(x)	((pte_t) { (x) } )
+#define __pgd(x)	((pgd_t) { (x) } )
+#define __pgprot(x)	((pgprot_t) { (x) } )
+
+/*
+ * Pure 2^n version of get_order
+ * Use 'nsau' instructions if supported by the processor or the generic version.
+ */
+
+#if XCHAL_HAVE_NSA
+
+static inline __attribute_const__ int get_order(unsigned long size)
+{
+	int lz;
+	asm ("nsau %0, %1" : "=r" (lz) : "r" ((size - 1) >> PAGE_SHIFT));
+	return 32 - lz;
+}
+
+#else
+
+# include <asm-generic/getorder.h>
+
+#endif
+
+struct page;
+struct vm_area_struct;
+extern void clear_page(void *page);
+extern void copy_page(void *to, void *from);
+
+/*
+ * If we have cache aliasing and writeback caches, we might have to do
+ * some extra work
+ */
+
+#if defined(CONFIG_MMU) && DCACHE_WAY_SIZE > PAGE_SIZE
+extern void clear_page_alias(void *vaddr, unsigned long paddr);
+extern void copy_page_alias(void *to, void *from,
+			    unsigned long to_paddr, unsigned long from_paddr);
+
+#define clear_user_highpage clear_user_highpage
+void clear_user_highpage(struct page *page, unsigned long vaddr);
+#define __HAVE_ARCH_COPY_USER_HIGHPAGE
+void copy_user_highpage(struct page *to, struct page *from,
+			unsigned long vaddr, struct vm_area_struct *vma);
+#else
+# define clear_user_page(page, vaddr, pg)	clear_page(page)
+# define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
+#endif
+
+/*
+ * This handles the memory map.  We handle pages at
+ * XCHAL_KSEG_CACHED_VADDR for kernels with 32 bit address space.
+ * These macros are for conversion of kernel address, not user
+ * addresses.
+ */
+
+#define ARCH_PFN_OFFSET		(PHYS_OFFSET >> PAGE_SHIFT)
+
+#ifdef CONFIG_MMU
+static inline unsigned long ___pa(unsigned long va)
+{
+	unsigned long off = va - PAGE_OFFSET;
+
+	if (off >= XCHAL_KSEG_SIZE)
+		off -= XCHAL_KSEG_SIZE;
+
+#ifndef CONFIG_XIP_KERNEL
+	return off + PHYS_OFFSET;
+#else
+	if (off < XCHAL_KSEG_SIZE)
+		return off + PHYS_OFFSET;
+
+	off -= XCHAL_KSEG_SIZE;
+	if (off >= XCHAL_KIO_SIZE)
+		off -= XCHAL_KIO_SIZE;
+
+	return off + XCHAL_KIO_PADDR;
+#endif
+}
+#define __pa(x)	___pa((unsigned long)(x))
+#else
+#define __pa(x)	\
+	((unsigned long) (x) - PAGE_OFFSET + PHYS_OFFSET)
+#endif
+#define __va(x)	\
+	((void *)((unsigned long) (x) - PHYS_OFFSET + PAGE_OFFSET))
+#define pfn_valid(pfn) \
+	((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
+
+#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+#define page_to_virt(page)	__va(page_to_pfn(page) << PAGE_SHIFT)
+#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
+
+#endif /* __ASSEMBLY__ */
+
+#include <asm-generic/memory_model.h>
+#endif /* _XTENSA_PAGE_H */
diff --git a/arch/xtensa/include/asm/pci-bridge.h b/arch/xtensa/include/asm/pci-bridge.h
new file mode 100644
index 000000000..e320aa5bb
--- /dev/null
+++ b/arch/xtensa/include/asm/pci-bridge.h
@@ -0,0 +1,76 @@
+/*
+ * include/asm-xtensa/pci-bridge.h
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ *
+ * Copyright (C) 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_PCI_BRIDGE_H
+#define _XTENSA_PCI_BRIDGE_H
+
+struct device_node;
+struct pci_controller;
+
+/*
+ * pciauto_bus_scan() enumerates the pci space.
+ */
+
+extern int pciauto_bus_scan(struct pci_controller *, int);
+
+struct pci_space {
+	unsigned long start;
+	unsigned long end;
+	unsigned long base;
+};
+
+/*
+ * Structure of a PCI controller (host bridge)
+ */
+
+struct pci_controller {
+	int index;			/* used for pci_controller_num */
+	struct pci_controller *next;
+	struct pci_bus *bus;
+	void *arch_data;
+
+	int first_busno;
+	int last_busno;
+
+	struct pci_ops *ops;
+	volatile unsigned int *cfg_addr;
+	volatile unsigned char *cfg_data;
+
+	/* Currently, we limit ourselves to 1 IO range and 3 mem
+	 * ranges since the common pci_bus structure can't handle more
+	 */
+	struct resource	io_resource;
+	struct resource mem_resources[3];
+	int mem_resource_count;
+
+	/* Host bridge I/O and Memory space
+	 * Used for BAR placement algorithms
+	 */
+	struct pci_space io_space;
+	struct pci_space mem_space;
+
+	/* Return the interrupt number fo a device. */
+	int (*map_irq)(struct pci_dev*, u8, u8);
+
+};
+
+static inline void pcibios_init_resource(struct resource *res,
+		unsigned long start, unsigned long end, int flags, char *name)
+{
+	res->start = start;
+	res->end = end;
+	res->flags = flags;
+	res->name = name;
+	res->parent = NULL;
+	res->sibling = NULL;
+	res->child = NULL;
+}
+
+#endif	/* _XTENSA_PCI_BRIDGE_H */
diff --git a/arch/xtensa/include/asm/pci.h b/arch/xtensa/include/asm/pci.h
new file mode 100644
index 000000000..b56de9635
--- /dev/null
+++ b/arch/xtensa/include/asm/pci.h
@@ -0,0 +1,46 @@
+/*
+ * linux/include/asm-xtensa/pci.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_PCI_H
+#define _XTENSA_PCI_H
+
+/* Can be used to override the logic in pci_scan_bus for skipping
+ * already-configured bus numbers - to be used for buggy BIOSes
+ * or architectures with incomplete PCI setup by the loader
+ */
+
+#define pcibios_assign_all_busses()	0
+
+/* Assume some values. (We should revise them, if necessary) */
+
+#define PCIBIOS_MIN_IO		0x2000
+#define PCIBIOS_MIN_MEM		0x10000000
+
+/* Dynamic DMA mapping stuff.
+ * Xtensa has everything mapped statically like x86.
+ */
+
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/scatterlist.h>
+#include <linux/string.h>
+#include <asm/io.h>
+
+/* The PCI address space does equal the physical memory address space.
+ * The networking and block device layers use this boolean for bounce buffer
+ * decisions.
+ */
+
+/* Tell PCI code what kind of PCI resource mappings we support */
+#define HAVE_PCI_MMAP			1
+#define ARCH_GENERIC_PCI_MMAP_RESOURCE	1
+#define arch_can_pci_mmap_io()		1
+
+#endif	/* _XTENSA_PCI_H */
diff --git a/arch/xtensa/include/asm/perf_event.h b/arch/xtensa/include/asm/perf_event.h
new file mode 100644
index 000000000..5aa4590ac
--- /dev/null
+++ b/arch/xtensa/include/asm/perf_event.h
@@ -0,0 +1,4 @@
+#ifndef __ASM_XTENSA_PERF_EVENT_H
+#define __ASM_XTENSA_PERF_EVENT_H
+
+#endif /* __ASM_XTENSA_PERF_EVENT_H */
diff --git a/arch/xtensa/include/asm/pgalloc.h b/arch/xtensa/include/asm/pgalloc.h
new file mode 100644
index 000000000..7fc0f9126
--- /dev/null
+++ b/arch/xtensa/include/asm/pgalloc.h
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * include/asm-xtensa/pgalloc.h
+ *
+ * Copyright (C) 2001-2007 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_PGALLOC_H
+#define _XTENSA_PGALLOC_H
+
+#ifdef CONFIG_MMU
+#include <linux/highmem.h>
+#include <linux/slab.h>
+
+#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
+#define __HAVE_ARCH_PTE_ALLOC_ONE
+#include <asm-generic/pgalloc.h>
+
+/*
+ * Allocating and freeing a pmd is trivial: the 1-entry pmd is
+ * inside the pgd, so has no extra memory associated with it.
+ */
+
+#define pmd_populate_kernel(mm, pmdp, ptep)				     \
+	(pmd_val(*(pmdp)) = ((unsigned long)ptep))
+#define pmd_populate(mm, pmdp, page)					     \
+	(pmd_val(*(pmdp)) = ((unsigned long)page_to_virt(page)))
+
+static inline pgd_t*
+pgd_alloc(struct mm_struct *mm)
+{
+	return (pgd_t*) __get_free_page(GFP_KERNEL | __GFP_ZERO);
+}
+
+static inline void ptes_clear(pte_t *ptep)
+{
+	int i;
+
+	for (i = 0; i < PTRS_PER_PTE; i++)
+		pte_clear(NULL, 0, ptep + i);
+}
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
+{
+	pte_t *ptep;
+
+	ptep = (pte_t *)__pte_alloc_one_kernel(mm);
+	if (!ptep)
+		return NULL;
+	ptes_clear(ptep);
+	return ptep;
+}
+
+static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
+{
+	struct page *page;
+
+	page = __pte_alloc_one(mm, GFP_PGTABLE_USER);
+	if (!page)
+		return NULL;
+	ptes_clear(page_address(page));
+	return page;
+}
+
+#endif /* CONFIG_MMU */
+
+#endif /* _XTENSA_PGALLOC_H */
diff --git a/arch/xtensa/include/asm/pgtable.h b/arch/xtensa/include/asm/pgtable.h
new file mode 100644
index 000000000..54f577c13
--- /dev/null
+++ b/arch/xtensa/include/asm/pgtable.h
@@ -0,0 +1,412 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * include/asm-xtensa/pgtable.h
+ *
+ * Copyright (C) 2001 - 2013 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_PGTABLE_H
+#define _XTENSA_PGTABLE_H
+
+#include <asm/page.h>
+#include <asm/kmem_layout.h>
+#include <asm-generic/pgtable-nopmd.h>
+
+/*
+ * We only use two ring levels, user and kernel space.
+ */
+
+#ifdef CONFIG_MMU
+#define USER_RING		1	/* user ring level */
+#else
+#define USER_RING		0
+#endif
+#define KERNEL_RING		0	/* kernel ring level */
+
+/*
+ * The Xtensa architecture port of Linux has a two-level page table system,
+ * i.e. the logical three-level Linux page table layout is folded.
+ * Each task has the following memory page tables:
+ *
+ *   PGD table (page directory), ie. 3rd-level page table:
+ *	One page (4 kB) of 1024 (PTRS_PER_PGD) pointers to PTE tables
+ *	(Architectures that don't have the PMD folded point to the PMD tables)
+ *
+ *	The pointer to the PGD table for a given task can be retrieved from
+ *	the task structure (struct task_struct*) t, e.g. current():
+ *	  (t->mm ? t->mm : t->active_mm)->pgd
+ *
+ *   PMD tables (page middle-directory), ie. 2nd-level page tables:
+ *	Absent for the Xtensa architecture (folded, PTRS_PER_PMD == 1).
+ *
+ *   PTE tables (page table entry), ie. 1st-level page tables:
+ *	One page (4 kB) of 1024 (PTRS_PER_PTE) PTEs with a special PTE
+ *	invalid_pte_table for absent mappings.
+ *
+ * The individual pages are 4 kB big with special pages for the empty_zero_page.
+ */
+
+#define PGDIR_SHIFT	22
+#define PGDIR_SIZE	(1UL << PGDIR_SHIFT)
+#define PGDIR_MASK	(~(PGDIR_SIZE-1))
+
+/*
+ * Entries per page directory level: we use two-level, so
+ * we don't really have any PMD directory physically.
+ */
+#define PTRS_PER_PTE		1024
+#define PTRS_PER_PTE_SHIFT	10
+#define PTRS_PER_PGD		1024
+#define USER_PTRS_PER_PGD	(TASK_SIZE/PGDIR_SIZE)
+#define FIRST_USER_PGD_NR	(FIRST_USER_ADDRESS >> PGDIR_SHIFT)
+
+#ifdef CONFIG_MMU
+/*
+ * Virtual memory area. We keep a distance to other memory regions to be
+ * on the safe side. We also use this area for cache aliasing.
+ */
+#define VMALLOC_START		(XCHAL_KSEG_CACHED_VADDR - 0x10000000)
+#define VMALLOC_END		(VMALLOC_START + 0x07FEFFFF)
+#define TLBTEMP_BASE_1		(VMALLOC_START + 0x08000000)
+#define TLBTEMP_BASE_2		(TLBTEMP_BASE_1 + DCACHE_WAY_SIZE)
+#if 2 * DCACHE_WAY_SIZE > ICACHE_WAY_SIZE
+#define TLBTEMP_SIZE		(2 * DCACHE_WAY_SIZE)
+#else
+#define TLBTEMP_SIZE		ICACHE_WAY_SIZE
+#endif
+
+#else
+
+#define VMALLOC_START		__XTENSA_UL_CONST(0)
+#define VMALLOC_END		__XTENSA_UL_CONST(0xffffffff)
+
+#endif
+
+/*
+ * For the Xtensa architecture, the PTE layout is as follows:
+ *
+ *		31------12  11  10-9   8-6  5-4  3-2  1-0
+ *		+-----------------------------------------+
+ *		|           |   Software   |   HARDWARE   |
+ *		|    PPN    |          ADW | RI |Attribute|
+ *		+-----------------------------------------+
+ *   pte_none	|             MBZ          | 01 | 11 | 00 |
+ *		+-----------------------------------------+
+ *   present	|    PPN    | 0 | 00 | ADW | RI | CA | wx |
+ *		+- - - - - - - - - - - - - - - - - - - - -+
+ *   (PAGE_NONE)|    PPN    | 0 | 00 | ADW | 01 | 11 | 11 |
+ *		+-----------------------------------------+
+ *   swap	|     index     |   type   | 01 | 11 | 00 |
+ *		+-----------------------------------------+
+ *
+ * For T1050 hardware and earlier the layout differs for present and (PAGE_NONE)
+ *		+-----------------------------------------+
+ *   present	|    PPN    | 0 | 00 | ADW | RI | CA | w1 |
+ *		+-----------------------------------------+
+ *   (PAGE_NONE)|    PPN    | 0 | 00 | ADW | 01 | 01 | 00 |
+ *		+-----------------------------------------+
+ *
+ *  Legend:
+ *   PPN        Physical Page Number
+ *   ADW	software: accessed (young) / dirty / writable
+ *   RI         ring (0=privileged, 1=user, 2 and 3 are unused)
+ *   CA		cache attribute: 00 bypass, 01 writeback, 10 writethrough
+ *		(11 is invalid and used to mark pages that are not present)
+ *   w		page is writable (hw)
+ *   x		page is executable (hw)
+ *   index      swap offset / PAGE_SIZE (bit 11-31: 21 bits -> 8 GB)
+ *		(note that the index is always non-zero)
+ *   type       swap type (5 bits -> 32 types)
+ *
+ *  Notes:
+ *   - (PROT_NONE) is a special case of 'present' but causes an exception for
+ *     any access (read, write, and execute).
+ *   - 'multihit-exception' has the highest priority of all MMU exceptions,
+ *     so the ring must be set to 'RING_USER' even for 'non-present' pages.
+ *   - on older hardware, the exectuable flag was not supported and
+ *     used as a 'valid' flag, so it needs to be always set.
+ *   - we need to keep track of certain flags in software (dirty and young)
+ *     to do this, we use write exceptions and have a separate software w-flag.
+ *   - attribute value 1101 (and 1111 on T1050 and earlier) is reserved
+ */
+
+#define _PAGE_ATTRIB_MASK	0xf
+
+#define _PAGE_HW_EXEC		(1<<0)	/* hardware: page is executable */
+#define _PAGE_HW_WRITE		(1<<1)	/* hardware: page is writable */
+
+#define _PAGE_CA_BYPASS		(0<<2)	/* bypass, non-speculative */
+#define _PAGE_CA_WB		(1<<2)	/* write-back */
+#define _PAGE_CA_WT		(2<<2)	/* write-through */
+#define _PAGE_CA_MASK		(3<<2)
+#define _PAGE_CA_INVALID	(3<<2)
+
+/* We use invalid attribute values to distinguish special pte entries */
+#if XCHAL_HW_VERSION_MAJOR < 2000
+#define _PAGE_HW_VALID		0x01	/* older HW needed this bit set */
+#define _PAGE_NONE		0x04
+#else
+#define _PAGE_HW_VALID		0x00
+#define _PAGE_NONE		0x0f
+#endif
+
+#define _PAGE_USER		(1<<4)	/* user access (ring=1) */
+
+/* Software */
+#define _PAGE_WRITABLE_BIT	6
+#define _PAGE_WRITABLE		(1<<6)	/* software: page writable */
+#define _PAGE_DIRTY		(1<<7)	/* software: page dirty */
+#define _PAGE_ACCESSED		(1<<8)	/* software: page accessed (read) */
+
+#ifdef CONFIG_MMU
+
+#define _PAGE_CHG_MASK	   (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
+#define _PAGE_PRESENT	   (_PAGE_HW_VALID | _PAGE_CA_WB | _PAGE_ACCESSED)
+
+#define PAGE_NONE	   __pgprot(_PAGE_NONE | _PAGE_USER)
+#define PAGE_COPY	   __pgprot(_PAGE_PRESENT | _PAGE_USER)
+#define PAGE_COPY_EXEC	   __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_HW_EXEC)
+#define PAGE_READONLY	   __pgprot(_PAGE_PRESENT | _PAGE_USER)
+#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_HW_EXEC)
+#define PAGE_SHARED	   __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_WRITABLE)
+#define PAGE_SHARED_EXEC \
+	__pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_WRITABLE | _PAGE_HW_EXEC)
+#define PAGE_KERNEL	   __pgprot(_PAGE_PRESENT | _PAGE_HW_WRITE)
+#define PAGE_KERNEL_RO	   __pgprot(_PAGE_PRESENT)
+#define PAGE_KERNEL_EXEC   __pgprot(_PAGE_PRESENT|_PAGE_HW_WRITE|_PAGE_HW_EXEC)
+
+#if (DCACHE_WAY_SIZE > PAGE_SIZE)
+# define _PAGE_DIRECTORY   (_PAGE_HW_VALID | _PAGE_ACCESSED | _PAGE_CA_BYPASS)
+#else
+# define _PAGE_DIRECTORY   (_PAGE_HW_VALID | _PAGE_ACCESSED | _PAGE_CA_WB)
+#endif
+
+#else /* no mmu */
+
+# define _PAGE_CHG_MASK  (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
+# define PAGE_NONE       __pgprot(0)
+# define PAGE_SHARED     __pgprot(0)
+# define PAGE_COPY       __pgprot(0)
+# define PAGE_READONLY   __pgprot(0)
+# define PAGE_KERNEL     __pgprot(0)
+
+#endif
+
+/*
+ * On certain configurations of Xtensa MMUs (eg. the initial Linux config),
+ * the MMU can't do page protection for execute, and considers that the same as
+ * read.  Also, write permissions may imply read permissions.
+ * What follows is the closest we can get by reasonable means..
+ * See linux/mm/mmap.c for protection_map[] array that uses these definitions.
+ */
+#ifndef __ASSEMBLY__
+
+#define pte_ERROR(e) \
+	printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
+#define pgd_ERROR(e) \
+	printk("%s:%d: bad pgd entry %08lx.\n", __FILE__, __LINE__, pgd_val(e))
+
+extern unsigned long empty_zero_page[1024];
+
+#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
+
+#ifdef CONFIG_MMU
+extern pgd_t swapper_pg_dir[PAGE_SIZE/sizeof(pgd_t)];
+extern void paging_init(void);
+#else
+# define swapper_pg_dir NULL
+static inline void paging_init(void) { }
+#endif
+
+/*
+ * The pmd contains the kernel virtual address of the pte page.
+ */
+#define pmd_page_vaddr(pmd) ((unsigned long)(pmd_val(pmd) & PAGE_MASK))
+#define pmd_pfn(pmd) (__pa(pmd_val(pmd)) >> PAGE_SHIFT)
+#define pmd_page(pmd) virt_to_page(pmd_val(pmd))
+
+/*
+ * pte status.
+ */
+# define pte_none(pte)	 (pte_val(pte) == (_PAGE_CA_INVALID | _PAGE_USER))
+#if XCHAL_HW_VERSION_MAJOR < 2000
+# define pte_present(pte) ((pte_val(pte) & _PAGE_CA_MASK) != _PAGE_CA_INVALID)
+#else
+# define pte_present(pte)						\
+	(((pte_val(pte) & _PAGE_CA_MASK) != _PAGE_CA_INVALID)		\
+	 || ((pte_val(pte) & _PAGE_ATTRIB_MASK) == _PAGE_NONE))
+#endif
+#define pte_clear(mm,addr,ptep)						\
+	do { update_pte(ptep, __pte(_PAGE_CA_INVALID | _PAGE_USER)); } while (0)
+
+#define pmd_none(pmd)	 (!pmd_val(pmd))
+#define pmd_present(pmd) (pmd_val(pmd) & PAGE_MASK)
+#define pmd_bad(pmd)	 (pmd_val(pmd) & ~PAGE_MASK)
+#define pmd_clear(pmdp)	 do { set_pmd(pmdp, __pmd(0)); } while (0)
+
+static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITABLE; }
+static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
+static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
+
+static inline pte_t pte_wrprotect(pte_t pte)
+	{ pte_val(pte) &= ~(_PAGE_WRITABLE | _PAGE_HW_WRITE); return pte; }
+static inline pte_t pte_mkclean(pte_t pte)
+	{ pte_val(pte) &= ~(_PAGE_DIRTY | _PAGE_HW_WRITE); return pte; }
+static inline pte_t pte_mkold(pte_t pte)
+	{ pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
+static inline pte_t pte_mkdirty(pte_t pte)
+	{ pte_val(pte) |= _PAGE_DIRTY; return pte; }
+static inline pte_t pte_mkyoung(pte_t pte)
+	{ pte_val(pte) |= _PAGE_ACCESSED; return pte; }
+static inline pte_t pte_mkwrite(pte_t pte)
+	{ pte_val(pte) |= _PAGE_WRITABLE; return pte; }
+
+#define pgprot_noncached(prot) \
+		((__pgprot((pgprot_val(prot) & ~_PAGE_CA_MASK) | \
+			   _PAGE_CA_BYPASS)))
+
+/*
+ * Conversion functions: convert a page and protection to a page entry,
+ * and a page entry and page directory to the page they refer to.
+ */
+
+#define pte_pfn(pte)		(pte_val(pte) >> PAGE_SHIFT)
+#define pte_same(a,b)		(pte_val(a) == pte_val(b))
+#define pte_page(x)		pfn_to_page(pte_pfn(x))
+#define pfn_pte(pfn, prot)	__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
+#define mk_pte(page, prot)	pfn_pte(page_to_pfn(page), prot)
+
+static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
+{
+	return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
+}
+
+/*
+ * Certain architectures need to do special things when pte's
+ * within a page table are directly modified.  Thus, the following
+ * hook is made available.
+ */
+static inline void update_pte(pte_t *ptep, pte_t pteval)
+{
+	*ptep = pteval;
+#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK
+	__asm__ __volatile__ ("dhwb %0, 0" :: "a" (ptep));
+#endif
+
+}
+
+struct mm_struct;
+
+static inline void
+set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pteval)
+{
+	update_pte(ptep, pteval);
+}
+
+static inline void set_pte(pte_t *ptep, pte_t pteval)
+{
+	update_pte(ptep, pteval);
+}
+
+static inline void
+set_pmd(pmd_t *pmdp, pmd_t pmdval)
+{
+	*pmdp = pmdval;
+}
+
+struct vm_area_struct;
+
+static inline int
+ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr,
+			  pte_t *ptep)
+{
+	pte_t pte = *ptep;
+	if (!pte_young(pte))
+		return 0;
+	update_pte(ptep, pte_mkold(pte));
+	return 1;
+}
+
+static inline pte_t
+ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+{
+	pte_t pte = *ptep;
+	pte_clear(mm, addr, ptep);
+	return pte;
+}
+
+static inline void
+ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+{
+	pte_t pte = *ptep;
+	update_pte(ptep, pte_wrprotect(pte));
+}
+
+/*
+ * Encode and decode a swap and file entry.
+ */
+#define SWP_TYPE_BITS		5
+#define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS)
+
+#define __swp_type(entry)	(((entry).val >> 6) & 0x1f)
+#define __swp_offset(entry)	((entry).val >> 11)
+#define __swp_entry(type,offs)	\
+	((swp_entry_t){((type) << 6) | ((offs) << 11) | \
+	 _PAGE_CA_INVALID | _PAGE_USER})
+#define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })
+#define __swp_entry_to_pte(x)	((pte_t) { (x).val })
+
+#endif /*  !defined (__ASSEMBLY__) */
+
+
+#ifdef __ASSEMBLY__
+
+/* Assembly macro _PGD_INDEX is the same as C pgd_index(unsigned long),
+ *                _PGD_OFFSET as C pgd_offset(struct mm_struct*, unsigned long),
+ *                _PMD_OFFSET as C pmd_offset(pgd_t*, unsigned long)
+ *                _PTE_OFFSET as C pte_offset(pmd_t*, unsigned long)
+ *
+ * Note: We require an additional temporary register which can be the same as
+ *       the register that holds the address.
+ *
+ * ((pte_t*) ((unsigned long)(pmd_val(*pmd) & PAGE_MASK)) + pte_index(addr))
+ *
+ */
+#define _PGD_INDEX(rt,rs)	extui	rt, rs, PGDIR_SHIFT, 32-PGDIR_SHIFT
+#define _PTE_INDEX(rt,rs)	extui	rt, rs, PAGE_SHIFT, PTRS_PER_PTE_SHIFT
+
+#define _PGD_OFFSET(mm,adr,tmp)		l32i	mm, mm, MM_PGD;		\
+					_PGD_INDEX(tmp, adr);		\
+					addx4	mm, tmp, mm
+
+#define _PTE_OFFSET(pmd,adr,tmp)	_PTE_INDEX(tmp, adr);		\
+					srli	pmd, pmd, PAGE_SHIFT;	\
+					slli	pmd, pmd, PAGE_SHIFT;	\
+					addx4	pmd, tmp, pmd
+
+#else
+
+#define kern_addr_valid(addr)	(1)
+
+extern  void update_mmu_cache(struct vm_area_struct * vma,
+			      unsigned long address, pte_t *ptep);
+
+typedef pte_t *pte_addr_t;
+
+void update_mmu_tlb(struct vm_area_struct *vma,
+		    unsigned long address, pte_t *ptep);
+#define __HAVE_ARCH_UPDATE_MMU_TLB
+
+#endif /* !defined (__ASSEMBLY__) */
+
+#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
+#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
+#define __HAVE_ARCH_PTEP_SET_WRPROTECT
+#define __HAVE_ARCH_PTEP_MKDIRTY
+#define __HAVE_ARCH_PTE_SAME
+/* We provide our own get_unmapped_area to cope with
+ * SHM area cache aliasing for userland.
+ */
+#define HAVE_ARCH_UNMAPPED_AREA
+
+#endif /* _XTENSA_PGTABLE_H */
diff --git a/arch/xtensa/include/asm/platform.h b/arch/xtensa/include/asm/platform.h
new file mode 100644
index 000000000..354ca942d
--- /dev/null
+++ b/arch/xtensa/include/asm/platform.h
@@ -0,0 +1,66 @@
+/*
+ * Platform specific functions
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_PLATFORM_H
+#define _XTENSA_PLATFORM_H
+
+#include <linux/types.h>
+#include <asm/bootparam.h>
+
+/*
+ * platform_init is called before the mmu is initialized to give the
+ * platform a early hook-up. bp_tag_t is a list of configuration tags
+ * passed from the boot-loader.
+ */
+extern void platform_init(bp_tag_t*);
+
+/*
+ * platform_setup is called from setup_arch with a pointer to the command-line
+ * string.
+ */
+extern void platform_setup (char **);
+
+/*
+ * platform_restart is called to restart the system.
+ */
+extern void platform_restart (void);
+
+/*
+ * platform_halt is called to stop the system and halt.
+ */
+extern void platform_halt (void);
+
+/*
+ * platform_power_off is called to stop the system and power it off.
+ */
+extern void platform_power_off (void);
+
+/*
+ * platform_idle is called from the idle function.
+ */
+extern void platform_idle (void);
+
+/*
+ * platform_heartbeat is called every HZ
+ */
+extern void platform_heartbeat (void);
+
+/*
+ * platform_calibrate_ccount calibrates cpu clock freq (CONFIG_XTENSA_CALIBRATE)
+ */
+extern void platform_calibrate_ccount (void);
+
+/*
+ * Flush and reset the mmu, simulate a processor reset, and
+ * jump to the reset vector.
+ */
+void cpu_reset(void) __attribute__((noreturn));
+
+#endif	/* _XTENSA_PLATFORM_H */
diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h
new file mode 100644
index 000000000..228e4dff5
--- /dev/null
+++ b/arch/xtensa/include/asm/processor.h
@@ -0,0 +1,273 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2008 Tensilica Inc.
+ * Copyright (C) 2015 Cadence Design Systems Inc.
+ */
+
+#ifndef _XTENSA_PROCESSOR_H
+#define _XTENSA_PROCESSOR_H
+
+#include <asm/core.h>
+
+#include <linux/compiler.h>
+#include <linux/stringify.h>
+#include <asm/ptrace.h>
+#include <asm/types.h>
+#include <asm/regs.h>
+
+#define ARCH_SLAB_MINALIGN XTENSA_STACK_ALIGNMENT
+
+/*
+ * User space process size: 1 GB.
+ * Windowed call ABI requires caller and callee to be located within the same
+ * 1 GB region. The C compiler places trampoline code on the stack for sources
+ * that take the address of a nested C function (a feature used by glibc), so
+ * the 1 GB requirement applies to the stack as well.
+ */
+
+#ifdef CONFIG_MMU
+#define TASK_SIZE	__XTENSA_UL_CONST(0x40000000)
+#else
+#define TASK_SIZE	__XTENSA_UL_CONST(0xffffffff)
+#endif
+
+#define STACK_TOP	TASK_SIZE
+#define STACK_TOP_MAX	STACK_TOP
+
+/*
+ * General exception cause assigned to fake NMI. Fake NMI needs to be handled
+ * differently from other interrupts, but it uses common kernel entry/exit
+ * code.
+ */
+
+#define EXCCAUSE_MAPPED_NMI	62
+
+/*
+ * General exception cause assigned to debug exceptions. Debug exceptions go
+ * to their own vector, rather than the general exception vectors (user,
+ * kernel, double); and their specific causes are reported via DEBUGCAUSE
+ * rather than EXCCAUSE.  However it is sometimes convenient to redirect debug
+ * exceptions to the general exception mechanism.  To do this, an otherwise
+ * unused EXCCAUSE value was assigned to debug exceptions for this purpose.
+ */
+
+#define EXCCAUSE_MAPPED_DEBUG	63
+
+/*
+ * We use DEPC also as a flag to distinguish between double and regular
+ * exceptions. For performance reasons, DEPC might contain the value of
+ * EXCCAUSE for regular exceptions, so we use this definition to mark a
+ * valid double exception address.
+ * (Note: We use it in bgeui, so it should be 64, 128, or 256)
+ */
+
+#define VALID_DOUBLE_EXCEPTION_ADDRESS	64
+
+#define XTENSA_INT_LEVEL(intno) _XTENSA_INT_LEVEL(intno)
+#define _XTENSA_INT_LEVEL(intno) XCHAL_INT##intno##_LEVEL
+
+#define XTENSA_INTLEVEL_MASK(level) _XTENSA_INTLEVEL_MASK(level)
+#define _XTENSA_INTLEVEL_MASK(level) (XCHAL_INTLEVEL##level##_MASK)
+
+#define XTENSA_INTLEVEL_ANDBELOW_MASK(l) _XTENSA_INTLEVEL_ANDBELOW_MASK(l)
+#define _XTENSA_INTLEVEL_ANDBELOW_MASK(l) (XCHAL_INTLEVEL##l##_ANDBELOW_MASK)
+
+#define PROFILING_INTLEVEL XTENSA_INT_LEVEL(XCHAL_PROFILING_INTERRUPT)
+
+/* LOCKLEVEL defines the interrupt level that masks all
+ * general-purpose interrupts.
+ */
+#if defined(CONFIG_XTENSA_FAKE_NMI) && defined(XCHAL_PROFILING_INTERRUPT)
+#define LOCKLEVEL (PROFILING_INTLEVEL - 1)
+#else
+#define LOCKLEVEL XCHAL_EXCM_LEVEL
+#endif
+
+#define TOPLEVEL XCHAL_EXCM_LEVEL
+#define XTENSA_FAKE_NMI (LOCKLEVEL < TOPLEVEL)
+
+/* WSBITS and WBBITS are the width of the WINDOWSTART and WINDOWBASE
+ * registers
+ */
+#define WSBITS  (XCHAL_NUM_AREGS / 4)      /* width of WINDOWSTART in bits */
+#define WBBITS  (XCHAL_NUM_AREGS_LOG2 - 2) /* width of WINDOWBASE in bits */
+
+#if defined(__XTENSA_WINDOWED_ABI__)
+#define KERNEL_PS_WOE_MASK PS_WOE_MASK
+#elif defined(__XTENSA_CALL0_ABI__)
+#define KERNEL_PS_WOE_MASK 0
+#else
+#error Unsupported xtensa ABI
+#endif
+
+#ifndef __ASSEMBLY__
+
+#if defined(__XTENSA_WINDOWED_ABI__)
+
+/* Build a valid return address for the specified call winsize.
+ * winsize must be 1 (call4), 2 (call8), or 3 (call12)
+ */
+#define MAKE_RA_FOR_CALL(ra,ws)   (((ra) & 0x3fffffff) | (ws) << 30)
+
+/* Convert return address to a valid pc
+ * Note: We assume that the stack pointer is in the same 1GB ranges as the ra
+ */
+#define MAKE_PC_FROM_RA(ra,sp)    (((ra) & 0x3fffffff) | ((sp) & 0xc0000000))
+
+#elif defined(__XTENSA_CALL0_ABI__)
+
+/* Build a valid return address for the specified call winsize.
+ * winsize must be 1 (call4), 2 (call8), or 3 (call12)
+ */
+#define MAKE_RA_FOR_CALL(ra, ws)   (ra)
+
+/* Convert return address to a valid pc
+ * Note: We assume that the stack pointer is in the same 1GB ranges as the ra
+ */
+#define MAKE_PC_FROM_RA(ra, sp)    (ra)
+
+#else
+#error Unsupported Xtensa ABI
+#endif
+
+/* Spill slot location for the register reg in the spill area under the stack
+ * pointer sp. reg must be in the range [0..4).
+ */
+#define SPILL_SLOT(sp, reg) (*(((unsigned long *)(sp)) - 4 + (reg)))
+
+/* Spill slot location for the register reg in the spill area under the stack
+ * pointer sp for the call8. reg must be in the range [4..8).
+ */
+#define SPILL_SLOT_CALL8(sp, reg) (*(((unsigned long *)(sp)) - 12 + (reg)))
+
+/* Spill slot location for the register reg in the spill area under the stack
+ * pointer sp for the call12. reg must be in the range [4..12).
+ */
+#define SPILL_SLOT_CALL12(sp, reg) (*(((unsigned long *)(sp)) - 16 + (reg)))
+
+struct thread_struct {
+
+	/* kernel's return address and stack pointer for context switching */
+	unsigned long ra; /* kernel's a0: return address and window call size */
+	unsigned long sp; /* kernel's a1: stack pointer */
+
+	/* struct xtensa_cpuinfo info; */
+
+	unsigned long bad_vaddr; /* last user fault */
+	unsigned long bad_uaddr; /* last kernel fault accessing user space */
+	unsigned long error_code;
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+	struct perf_event *ptrace_bp[XCHAL_NUM_IBREAK];
+	struct perf_event *ptrace_wp[XCHAL_NUM_DBREAK];
+#endif
+	/* Make structure 16 bytes aligned. */
+	int align[0] __attribute__ ((aligned(16)));
+};
+
+/* This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#define TASK_UNMAPPED_BASE	(TASK_SIZE / 2)
+
+#define INIT_THREAD  \
+{									\
+	ra:		0, 						\
+	sp:		sizeof(init_stack) + (long) &init_stack,	\
+	/*info:		{0}, */						\
+	bad_vaddr:	0,						\
+	bad_uaddr:	0,						\
+	error_code:	0,						\
+}
+
+
+/*
+ * Do necessary setup to start up a newly executed thread.
+ * Note: When windowed ABI is used for userspace we set-up ps
+ *       as if we did a call4 to the new pc.
+ *       set_thread_state in signal.c depends on it.
+ */
+#if IS_ENABLED(CONFIG_USER_ABI_CALL0)
+#define USER_PS_VALUE ((USER_RING << PS_RING_SHIFT) |			\
+		       (1 << PS_UM_BIT) |				\
+		       (1 << PS_EXCM_BIT))
+#else
+#define USER_PS_VALUE (PS_WOE_MASK |					\
+		       (1 << PS_CALLINC_SHIFT) |			\
+		       (USER_RING << PS_RING_SHIFT) |			\
+		       (1 << PS_UM_BIT) |				\
+		       (1 << PS_EXCM_BIT))
+#endif
+
+/* Clearing a0 terminates the backtrace. */
+#define start_thread(regs, new_pc, new_sp) \
+	do { \
+		unsigned long syscall = (regs)->syscall; \
+		unsigned long current_aregs[16]; \
+		memcpy(current_aregs, (regs)->areg, sizeof(current_aregs)); \
+		memset((regs), 0, sizeof(*(regs))); \
+		(regs)->pc = (new_pc); \
+		(regs)->ps = USER_PS_VALUE; \
+		memcpy((regs)->areg, current_aregs, sizeof(current_aregs)); \
+		(regs)->areg[1] = (new_sp); \
+		(regs)->areg[0] = 0; \
+		(regs)->wmask = 1; \
+		(regs)->depc = 0; \
+		(regs)->windowbase = 0; \
+		(regs)->windowstart = 1; \
+		(regs)->syscall = syscall; \
+	} while (0)
+
+/* Forward declaration */
+struct task_struct;
+struct mm_struct;
+
+extern unsigned long __get_wchan(struct task_struct *p);
+
+#define KSTK_EIP(tsk)		(task_pt_regs(tsk)->pc)
+#define KSTK_ESP(tsk)		(task_pt_regs(tsk)->areg[1])
+
+#define cpu_relax()  barrier()
+
+/* Special register access. */
+
+#define xtensa_set_sr(x, sr) \
+	({ \
+	 __asm__ __volatile__ ("wsr %0, "__stringify(sr) :: \
+			       "a"((unsigned int)(x))); \
+	 })
+
+#define xtensa_get_sr(sr) \
+	({ \
+	 unsigned int v; \
+	 __asm__ __volatile__ ("rsr %0, "__stringify(sr) : "=a"(v)); \
+	 v; \
+	 })
+
+#define xtensa_xsr(x, sr) \
+	({ \
+	 unsigned int __v__ = (unsigned int)(x); \
+	 __asm__ __volatile__ ("xsr %0, " __stringify(sr) : "+a"(__v__)); \
+	 __v__; \
+	 })
+
+#if XCHAL_HAVE_EXTERN_REGS
+
+static inline void set_er(unsigned long value, unsigned long addr)
+{
+	asm volatile ("wer %0, %1" : : "a" (value), "a" (addr) : "memory");
+}
+
+static inline unsigned long get_er(unsigned long addr)
+{
+	register unsigned long value;
+	asm volatile ("rer %0, %1" : "=a" (value) : "a" (addr) : "memory");
+	return value;
+}
+
+#endif /* XCHAL_HAVE_EXTERN_REGS */
+
+#endif	/* __ASSEMBLY__ */
+#endif	/* _XTENSA_PROCESSOR_H */
diff --git a/arch/xtensa/include/asm/ptrace.h b/arch/xtensa/include/asm/ptrace.h
new file mode 100644
index 000000000..308f209a4
--- /dev/null
+++ b/arch/xtensa/include/asm/ptrace.h
@@ -0,0 +1,116 @@
+/*
+ * include/asm-xtensa/ptrace.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+#ifndef _XTENSA_PTRACE_H
+#define _XTENSA_PTRACE_H
+
+#include <asm/kmem_layout.h>
+#include <uapi/asm/ptrace.h>
+
+/*
+ * Kernel stack
+ *
+ *		+-----------------------+  -------- STACK_SIZE
+ *		|     register file     |  |
+ *		+-----------------------+  |
+ *		|    struct pt_regs     |  |
+ *		+-----------------------+  | ------ PT_REGS_OFFSET
+ * double	:  16 bytes spill area  :  |  ^
+ * excetion	:- - - - - - - - - - - -:  |  |
+ * frame	:    struct pt_regs     :  |  |
+ *		:- - - - - - - - - - - -:  |  |
+ *		|                       |  |  |
+ *		|     memory stack      |  |  |
+ *		|                       |  |  |
+ *		~                       ~  ~  ~
+ *		~                       ~  ~  ~
+ *		|                       |  |  |
+ *		|                       |  |  |
+ *		+-----------------------+  |  | --- STACK_BIAS
+ *		|  struct task_struct   |  |  |  ^
+ *  current --> +-----------------------+  |  |  |
+ *		|  struct thread_info   |  |  |  |
+ *		+-----------------------+ --------
+ */
+
+#define NO_SYSCALL (-1)
+
+#ifndef __ASSEMBLY__
+
+#include <asm/coprocessor.h>
+#include <asm/core.h>
+
+/*
+ * This struct defines the way the registers are stored on the
+ * kernel stack during a system call or other kernel entry.
+ */
+struct pt_regs {
+	unsigned long pc;		/*   4 */
+	unsigned long ps;		/*   8 */
+	unsigned long depc;		/*  12 */
+	unsigned long exccause;		/*  16 */
+	unsigned long excvaddr;		/*  20 */
+	unsigned long debugcause;	/*  24 */
+	unsigned long wmask;		/*  28 */
+	unsigned long lbeg;		/*  32 */
+	unsigned long lend;		/*  36 */
+	unsigned long lcount;		/*  40 */
+	unsigned long sar;		/*  44 */
+	unsigned long windowbase;	/*  48 */
+	unsigned long windowstart;	/*  52 */
+	unsigned long syscall;		/*  56 */
+	unsigned long icountlevel;	/*  60 */
+	unsigned long scompare1;	/*  64 */
+	unsigned long threadptr;	/*  68 */
+
+	/* Additional configurable registers that are used by the compiler. */
+	xtregs_opt_t xtregs_opt;
+
+	/* Make sure the areg field is 16 bytes aligned. */
+	int align[0] __attribute__ ((aligned(16)));
+
+	/* current register frame.
+	 * Note: The ESF for kernel exceptions ends after 16 registers!
+	 */
+	unsigned long areg[XCHAL_NUM_AREGS];
+};
+
+# define arch_has_single_step()	(1)
+# define task_pt_regs(tsk) ((struct pt_regs*) \
+	(task_stack_page(tsk) + KERNEL_STACK_SIZE) - 1)
+# define user_mode(regs) (((regs)->ps & 0x00000020)!=0)
+# define instruction_pointer(regs) ((regs)->pc)
+# define return_pointer(regs) (MAKE_PC_FROM_RA((regs)->areg[0], \
+					       (regs)->areg[1]))
+
+# ifndef CONFIG_SMP
+#  define profile_pc(regs) instruction_pointer(regs)
+# else
+#  define profile_pc(regs)						\
+	({								\
+		in_lock_functions(instruction_pointer(regs)) ?		\
+		return_pointer(regs) : instruction_pointer(regs);	\
+	})
+# endif
+
+#define user_stack_pointer(regs) ((regs)->areg[1])
+
+static inline unsigned long regs_return_value(struct pt_regs *regs)
+{
+	return regs->areg[2];
+}
+
+#else	/* __ASSEMBLY__ */
+
+# include <asm/asm-offsets.h>
+#define PT_REGS_OFFSET	  (KERNEL_STACK_SIZE - PT_USER_SIZE)
+
+#endif	/* !__ASSEMBLY__ */
+
+#endif	/* _XTENSA_PTRACE_H */
diff --git a/arch/xtensa/include/asm/regs.h b/arch/xtensa/include/asm/regs.h
new file mode 100644
index 000000000..ce184e7de
--- /dev/null
+++ b/arch/xtensa/include/asm/regs.h
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2006 Tensilica, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2.1 of the GNU Lesser General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307,
+ * USA.
+ */
+
+#ifndef _XTENSA_REGS_H
+#define _XTENSA_REGS_H
+
+/*  Special registers.  */
+
+#define SREG_MR			32
+#define SREG_IBREAKENABLE	96
+#define SREG_IBREAKA		128
+#define SREG_DBREAKA		144
+#define SREG_DBREAKC		160
+#define SREG_EPC		176
+#define SREG_EPS		192
+#define SREG_EXCSAVE		208
+#define SREG_CCOMPARE		240
+#define SREG_MISC		244
+
+/*  EXCCAUSE register fields  */
+
+#define EXCCAUSE_EXCCAUSE_SHIFT	0
+#define EXCCAUSE_EXCCAUSE_MASK	0x3F
+
+#define EXCCAUSE_ILLEGAL_INSTRUCTION		0
+#define EXCCAUSE_SYSTEM_CALL			1
+#define EXCCAUSE_INSTRUCTION_FETCH_ERROR	2
+#define EXCCAUSE_LOAD_STORE_ERROR		3
+#define EXCCAUSE_LEVEL1_INTERRUPT		4
+#define EXCCAUSE_ALLOCA				5
+#define EXCCAUSE_INTEGER_DIVIDE_BY_ZERO		6
+#define EXCCAUSE_SPECULATION			7
+#define EXCCAUSE_PRIVILEGED			8
+#define EXCCAUSE_UNALIGNED			9
+#define EXCCAUSE_INSTR_DATA_ERROR		12
+#define EXCCAUSE_LOAD_STORE_DATA_ERROR		13
+#define EXCCAUSE_INSTR_ADDR_ERROR		14
+#define EXCCAUSE_LOAD_STORE_ADDR_ERROR		15
+#define EXCCAUSE_ITLB_MISS			16
+#define EXCCAUSE_ITLB_MULTIHIT			17
+#define EXCCAUSE_ITLB_PRIVILEGE			18
+#define EXCCAUSE_ITLB_SIZE_RESTRICTION		19
+#define EXCCAUSE_FETCH_CACHE_ATTRIBUTE		20
+#define EXCCAUSE_DTLB_MISS			24
+#define EXCCAUSE_DTLB_MULTIHIT			25
+#define EXCCAUSE_DTLB_PRIVILEGE			26
+#define EXCCAUSE_DTLB_SIZE_RESTRICTION		27
+#define EXCCAUSE_LOAD_CACHE_ATTRIBUTE		28
+#define EXCCAUSE_STORE_CACHE_ATTRIBUTE		29
+#define EXCCAUSE_COPROCESSOR0_DISABLED		32
+#define EXCCAUSE_COPROCESSOR1_DISABLED		33
+#define EXCCAUSE_COPROCESSOR2_DISABLED		34
+#define EXCCAUSE_COPROCESSOR3_DISABLED		35
+#define EXCCAUSE_COPROCESSOR4_DISABLED		36
+#define EXCCAUSE_COPROCESSOR5_DISABLED		37
+#define EXCCAUSE_COPROCESSOR6_DISABLED		38
+#define EXCCAUSE_COPROCESSOR7_DISABLED		39
+#define EXCCAUSE_N				64
+
+/*  PS register fields.  */
+
+#define PS_WOE_BIT		18
+#define PS_WOE_MASK		0x00040000
+#define PS_CALLINC_SHIFT	16
+#define PS_CALLINC_MASK		0x00030000
+#define PS_OWB_SHIFT		8
+#define PS_OWB_WIDTH		4
+#define PS_OWB_MASK		0x00000F00
+#define PS_RING_SHIFT		6
+#define PS_RING_MASK		0x000000C0
+#define PS_UM_BIT		5
+#define PS_EXCM_BIT		4
+#define PS_INTLEVEL_SHIFT	0
+#define PS_INTLEVEL_WIDTH	4
+#define PS_INTLEVEL_MASK	0x0000000F
+
+/*  DBREAKCn register fields.  */
+
+#define DBREAKC_MASK_BIT		0
+#define DBREAKC_MASK_MASK		0x0000003F
+#define DBREAKC_LOAD_BIT		30
+#define DBREAKC_LOAD_MASK		0x40000000
+#define DBREAKC_STOR_BIT		31
+#define DBREAKC_STOR_MASK		0x80000000
+
+/*  DEBUGCAUSE register fields.  */
+
+#define DEBUGCAUSE_DBNUM_MASK		0xf00
+#define DEBUGCAUSE_DBNUM_SHIFT		8	/* First bit of DBNUM field */
+#define DEBUGCAUSE_DEBUGINT_BIT		5	/* External debug interrupt */
+#define DEBUGCAUSE_BREAKN_BIT		4	/* BREAK.N instruction */
+#define DEBUGCAUSE_BREAK_BIT		3	/* BREAK instruction */
+#define DEBUGCAUSE_DBREAK_BIT		2	/* DBREAK match */
+#define DEBUGCAUSE_IBREAK_BIT		1	/* IBREAK match */
+#define DEBUGCAUSE_ICOUNT_BIT		0	/* ICOUNT would incr. to zero */
+
+#endif /* _XTENSA_SPECREG_H */
diff --git a/arch/xtensa/include/asm/seccomp.h b/arch/xtensa/include/asm/seccomp.h
new file mode 100644
index 000000000..f1cb6b0a9
--- /dev/null
+++ b/arch/xtensa/include/asm/seccomp.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _ASM_SECCOMP_H
+#define _ASM_SECCOMP_H
+
+#include <asm-generic/seccomp.h>
+
+#define SECCOMP_ARCH_NATIVE		AUDIT_ARCH_XTENSA
+#define SECCOMP_ARCH_NATIVE_NR		NR_syscalls
+#define SECCOMP_ARCH_NATIVE_NAME	"xtensa"
+
+#endif /* _ASM_SECCOMP_H */
diff --git a/arch/xtensa/include/asm/sections.h b/arch/xtensa/include/asm/sections.h
new file mode 100644
index 000000000..3bc6b9afa
--- /dev/null
+++ b/arch/xtensa/include/asm/sections.h
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _XTENSA_SECTIONS_H
+#define _XTENSA_SECTIONS_H
+
+#include <asm-generic/sections.h>
+
+#ifdef CONFIG_VECTORS_ADDR
+extern char _WindowVectors_text_start[];
+extern char _WindowVectors_text_end[];
+extern char _DebugInterruptVector_text_start[];
+extern char _DebugInterruptVector_text_end[];
+extern char _KernelExceptionVector_text_start[];
+extern char _KernelExceptionVector_text_end[];
+extern char _UserExceptionVector_text_start[];
+extern char _UserExceptionVector_text_end[];
+extern char _DoubleExceptionVector_text_start[];
+extern char _DoubleExceptionVector_text_end[];
+extern char _exception_text_start[];
+extern char _exception_text_end[];
+extern char _Level2InterruptVector_text_start[];
+extern char _Level2InterruptVector_text_end[];
+extern char _Level3InterruptVector_text_start[];
+extern char _Level3InterruptVector_text_end[];
+extern char _Level4InterruptVector_text_start[];
+extern char _Level4InterruptVector_text_end[];
+extern char _Level5InterruptVector_text_start[];
+extern char _Level5InterruptVector_text_end[];
+extern char _Level6InterruptVector_text_start[];
+extern char _Level6InterruptVector_text_end[];
+#endif
+#ifdef CONFIG_SECONDARY_RESET_VECTOR
+extern char _SecondaryResetVector_text_start[];
+extern char _SecondaryResetVector_text_end[];
+#endif
+#ifdef CONFIG_XIP_KERNEL
+extern char _xip_start[];
+extern char _xip_end[];
+#endif
+
+#endif
diff --git a/arch/xtensa/include/asm/serial.h b/arch/xtensa/include/asm/serial.h
new file mode 100644
index 000000000..a8a249326
--- /dev/null
+++ b/arch/xtensa/include/asm/serial.h
@@ -0,0 +1,18 @@
+/*
+ * include/asm-xtensa/serial.h
+ *
+ * Configuration details for 8250, 16450, 16550, etc. serial ports
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_SERIAL_H
+#define _XTENSA_SERIAL_H
+
+#include <platform/serial.h>
+
+#endif	/* _XTENSA_SERIAL_H */
diff --git a/arch/xtensa/include/asm/shmparam.h b/arch/xtensa/include/asm/shmparam.h
new file mode 100644
index 000000000..c8cc16c3d
--- /dev/null
+++ b/arch/xtensa/include/asm/shmparam.h
@@ -0,0 +1,21 @@
+/*
+ * include/asm-xtensa/shmparam.h
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ */
+
+#ifndef _XTENSA_SHMPARAM_H
+#define _XTENSA_SHMPARAM_H
+
+/*
+ * Xtensa can have variable size caches, and if
+ * the size of single way is larger than the page size,
+ * then we have to start worrying about cache aliasing
+ * problems.
+ */
+
+#define SHMLBA	((PAGE_SIZE > DCACHE_WAY_SIZE)? PAGE_SIZE : DCACHE_WAY_SIZE)
+
+#endif /* _XTENSA_SHMPARAM_H */
diff --git a/arch/xtensa/include/asm/signal.h b/arch/xtensa/include/asm/signal.h
new file mode 100644
index 000000000..de169b4ea
--- /dev/null
+++ b/arch/xtensa/include/asm/signal.h
@@ -0,0 +1,23 @@
+/*
+ * include/asm-xtensa/signal.h
+ *
+ * Swiped from SH.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+#ifndef _XTENSA_SIGNAL_H
+#define _XTENSA_SIGNAL_H
+
+#include <uapi/asm/signal.h>
+
+#ifndef __ASSEMBLY__
+#define __ARCH_HAS_SA_RESTORER
+
+#include <asm/sigcontext.h>
+
+#endif	/* __ASSEMBLY__ */
+#endif	/* _XTENSA_SIGNAL_H */
diff --git a/arch/xtensa/include/asm/smp.h b/arch/xtensa/include/asm/smp.h
new file mode 100644
index 000000000..4e43f5643
--- /dev/null
+++ b/arch/xtensa/include/asm/smp.h
@@ -0,0 +1,43 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2013 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_SMP_H
+#define _XTENSA_SMP_H
+
+#ifdef CONFIG_SMP
+
+#define raw_smp_processor_id()	(current_thread_info()->cpu)
+#define cpu_logical_map(cpu)	(cpu)
+
+struct start_info {
+	unsigned long stack;
+};
+extern struct start_info start_info;
+
+struct cpumask;
+void arch_send_call_function_ipi_mask(const struct cpumask *mask);
+void arch_send_call_function_single_ipi(int cpu);
+
+void smp_init_cpus(void);
+void secondary_init_irq(void);
+void ipi_init(void);
+struct seq_file;
+void show_ipi_list(struct seq_file *p, int prec);
+
+#ifdef CONFIG_HOTPLUG_CPU
+
+void __cpu_die(unsigned int cpu);
+int __cpu_disable(void);
+void cpu_die(void);
+void cpu_restart(void);
+
+#endif /* CONFIG_HOTPLUG_CPU */
+
+#endif /* CONFIG_SMP */
+
+#endif	/* _XTENSA_SMP_H */
diff --git a/arch/xtensa/include/asm/spinlock.h b/arch/xtensa/include/asm/spinlock.h
new file mode 100644
index 000000000..41c449ece
--- /dev/null
+++ b/arch/xtensa/include/asm/spinlock.h
@@ -0,0 +1,20 @@
+/*
+ * include/asm-xtensa/spinlock.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_SPINLOCK_H
+#define _XTENSA_SPINLOCK_H
+
+#include <asm/barrier.h>
+#include <asm/qspinlock.h>
+#include <asm/qrwlock.h>
+
+#define smp_mb__after_spinlock()	smp_mb()
+
+#endif	/* _XTENSA_SPINLOCK_H */
diff --git a/arch/xtensa/include/asm/spinlock_types.h b/arch/xtensa/include/asm/spinlock_types.h
new file mode 100644
index 000000000..797aed7df
--- /dev/null
+++ b/arch/xtensa/include/asm/spinlock_types.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_SPINLOCK_TYPES_H
+#define __ASM_SPINLOCK_TYPES_H
+
+#if !defined(__LINUX_SPINLOCK_TYPES_RAW_H) && !defined(__ASM_SPINLOCK_H)
+# error "please don't include this file directly"
+#endif
+
+#include <asm-generic/qspinlock_types.h>
+#include <asm-generic/qrwlock_types.h>
+
+#endif
diff --git a/arch/xtensa/include/asm/stackprotector.h b/arch/xtensa/include/asm/stackprotector.h
new file mode 100644
index 000000000..e368f94fd
--- /dev/null
+++ b/arch/xtensa/include/asm/stackprotector.h
@@ -0,0 +1,40 @@
+/*
+ * GCC stack protector support.
+ *
+ * (This is directly adopted from the ARM implementation)
+ *
+ * Stack protector works by putting predefined pattern at the start of
+ * the stack frame and verifying that it hasn't been overwritten when
+ * returning from the function.  The pattern is called stack canary
+ * and gcc expects it to be defined by a global variable called
+ * "__stack_chk_guard" on Xtensa.  This unfortunately means that on SMP
+ * we cannot have a different canary value per task.
+ */
+
+#ifndef _ASM_STACKPROTECTOR_H
+#define _ASM_STACKPROTECTOR_H 1
+
+#include <linux/random.h>
+#include <linux/version.h>
+
+extern unsigned long __stack_chk_guard;
+
+/*
+ * Initialize the stackprotector canary value.
+ *
+ * NOTE: this must only be called from functions that never return,
+ * and it must always be inlined.
+ */
+static __always_inline void boot_init_stack_canary(void)
+{
+	unsigned long canary;
+
+	/* Try to get a semi random initial value. */
+	get_random_bytes(&canary, sizeof(canary));
+	canary ^= LINUX_VERSION_CODE;
+
+	current->stack_canary = canary;
+	__stack_chk_guard = current->stack_canary;
+}
+
+#endif	/* _ASM_STACKPROTECTOR_H */
diff --git a/arch/xtensa/include/asm/stacktrace.h b/arch/xtensa/include/asm/stacktrace.h
new file mode 100644
index 000000000..a85e785a6
--- /dev/null
+++ b/arch/xtensa/include/asm/stacktrace.h
@@ -0,0 +1,44 @@
+/*
+ * arch/xtensa/include/asm/stacktrace.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2013 Tensilica Inc.
+ */
+#ifndef _XTENSA_STACKTRACE_H
+#define _XTENSA_STACKTRACE_H
+
+#include <linux/sched.h>
+
+struct stackframe {
+	unsigned long pc;
+	unsigned long sp;
+};
+
+static __always_inline unsigned long *stack_pointer(struct task_struct *task)
+{
+	unsigned long sp;
+
+	if (!task || task == current)
+		sp = current_stack_pointer;
+	else
+		sp = task->thread.sp;
+
+	return (unsigned long *)sp;
+}
+
+void walk_stackframe(unsigned long *sp,
+		int (*fn)(struct stackframe *frame, void *data),
+		void *data);
+
+void xtensa_backtrace_kernel(struct pt_regs *regs, unsigned int depth,
+			     int (*kfn)(struct stackframe *frame, void *data),
+			     int (*ufn)(struct stackframe *frame, void *data),
+			     void *data);
+void xtensa_backtrace_user(struct pt_regs *regs, unsigned int depth,
+			   int (*ufn)(struct stackframe *frame, void *data),
+			   void *data);
+
+#endif /* _XTENSA_STACKTRACE_H */
diff --git a/arch/xtensa/include/asm/string.h b/arch/xtensa/include/asm/string.h
new file mode 100644
index 000000000..89b51a0c7
--- /dev/null
+++ b/arch/xtensa/include/asm/string.h
@@ -0,0 +1,140 @@
+/*
+ * include/asm-xtensa/string.h
+ *
+ * These trivial string functions are considered part of the public domain.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+/* We should optimize these. See arch/xtensa/lib/strncpy_user.S */
+
+#ifndef _XTENSA_STRING_H
+#define _XTENSA_STRING_H
+
+#define __HAVE_ARCH_STRCPY
+static inline char *strcpy(char *__dest, const char *__src)
+{
+	register char *__xdest = __dest;
+	unsigned long __dummy;
+
+	__asm__ __volatile__("1:\n\t"
+		"l8ui	%2, %1, 0\n\t"
+		"s8i	%2, %0, 0\n\t"
+		"addi	%1, %1, 1\n\t"
+		"addi	%0, %0, 1\n\t"
+		"bnez	%2, 1b\n\t"
+		: "=r" (__dest), "=r" (__src), "=&r" (__dummy)
+		: "0" (__dest), "1" (__src)
+		: "memory");
+
+	return __xdest;
+}
+
+#define __HAVE_ARCH_STRNCPY
+static inline char *strncpy(char *__dest, const char *__src, size_t __n)
+{
+	register char *__xdest = __dest;
+	unsigned long __dummy;
+
+	if (__n == 0)
+		return __xdest;
+
+	__asm__ __volatile__(
+		"1:\n\t"
+		"l8ui	%2, %1, 0\n\t"
+		"s8i	%2, %0, 0\n\t"
+		"addi	%1, %1, 1\n\t"
+		"addi	%0, %0, 1\n\t"
+		"beqz	%2, 2f\n\t"
+		"bne	%1, %5, 1b\n"
+		"2:"
+		: "=r" (__dest), "=r" (__src), "=&r" (__dummy)
+		: "0" (__dest), "1" (__src), "r" ((uintptr_t)__src+__n)
+		: "memory");
+
+	return __xdest;
+}
+
+#define __HAVE_ARCH_STRCMP
+static inline int strcmp(const char *__cs, const char *__ct)
+{
+	register int __res;
+	unsigned long __dummy;
+
+	__asm__ __volatile__(
+		"1:\n\t"
+		"l8ui	%3, %1, 0\n\t"
+		"addi	%1, %1, 1\n\t"
+		"l8ui	%2, %0, 0\n\t"
+		"addi	%0, %0, 1\n\t"
+		"beqz	%2, 2f\n\t"
+		"beq	%2, %3, 1b\n"
+		"2:\n\t"
+		"sub	%2, %2, %3"
+		: "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy)
+		: "0" (__cs), "1" (__ct));
+
+	return __res;
+}
+
+#define __HAVE_ARCH_STRNCMP
+static inline int strncmp(const char *__cs, const char *__ct, size_t __n)
+{
+	register int __res;
+	unsigned long __dummy;
+
+	__asm__ __volatile__(
+		"mov	%2, %3\n"
+		"1:\n\t"
+		"beq	%0, %6, 2f\n\t"
+		"l8ui	%3, %1, 0\n\t"
+		"addi	%1, %1, 1\n\t"
+		"l8ui	%2, %0, 0\n\t"
+		"addi	%0, %0, 1\n\t"
+		"beqz	%2, 2f\n\t"
+		"beqz	%3, 2f\n\t"
+		"beq	%2, %3, 1b\n"
+		"2:\n\t"
+		"sub	%2, %2, %3"
+		: "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy)
+		: "0" (__cs), "1" (__ct), "r" ((uintptr_t)__cs+__n));
+
+	return __res;
+}
+
+#define __HAVE_ARCH_MEMSET
+extern void *memset(void *__s, int __c, size_t __count);
+extern void *__memset(void *__s, int __c, size_t __count);
+
+#define __HAVE_ARCH_MEMCPY
+extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
+extern void *__memcpy(void *__to, __const__ void *__from, size_t __n);
+
+#define __HAVE_ARCH_MEMMOVE
+extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
+extern void *__memmove(void *__dest, __const__ void *__src, size_t __n);
+
+/* Don't build bcopy at all ...  */
+#define __HAVE_ARCH_BCOPY
+
+#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
+
+/*
+ * For files that are not instrumented (e.g. mm/slub.c) we
+ * should use not instrumented version of mem* functions.
+ */
+
+#define memcpy(dst, src, len) __memcpy(dst, src, len)
+#define memmove(dst, src, len) __memmove(dst, src, len)
+#define memset(s, c, n) __memset(s, c, n)
+
+#ifndef __NO_FORTIFY
+#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
+#endif
+#endif
+
+#endif	/* _XTENSA_STRING_H */
diff --git a/arch/xtensa/include/asm/switch_to.h b/arch/xtensa/include/asm/switch_to.h
new file mode 100644
index 000000000..6b73bf0eb
--- /dev/null
+++ b/arch/xtensa/include/asm/switch_to.h
@@ -0,0 +1,22 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_SWITCH_TO_H
+#define _XTENSA_SWITCH_TO_H
+
+/* * switch_to(n) should switch tasks to task nr n, first
+ * checking that n isn't the current task, in which case it does nothing.
+ */
+extern void *_switch_to(void *last, void *next);
+
+#define switch_to(prev,next,last)		\
+do {						\
+	(last) = _switch_to(prev, next);	\
+} while(0)
+
+#endif /* _XTENSA_SWITCH_TO_H */
diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h
new file mode 100644
index 000000000..5ee974bf8
--- /dev/null
+++ b/arch/xtensa/include/asm/syscall.h
@@ -0,0 +1,76 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2007 Tensilica Inc.
+ * Copyright (C) 2018 Cadence Design Systems Inc.
+ */
+
+#ifndef _ASM_SYSCALL_H
+#define _ASM_SYSCALL_H
+
+#include <linux/err.h>
+#include <asm/ptrace.h>
+#include <uapi/linux/audit.h>
+
+static inline int syscall_get_arch(struct task_struct *task)
+{
+	return AUDIT_ARCH_XTENSA;
+}
+
+typedef void (*syscall_t)(void);
+extern syscall_t sys_call_table[];
+
+static inline long syscall_get_nr(struct task_struct *task,
+				  struct pt_regs *regs)
+{
+	return regs->syscall;
+}
+
+static inline void syscall_rollback(struct task_struct *task,
+				    struct pt_regs *regs)
+{
+	/* Do nothing. */
+}
+
+static inline long syscall_get_error(struct task_struct *task,
+				     struct pt_regs *regs)
+{
+	/* 0 if syscall succeeded, otherwise -Errorcode */
+	return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0;
+}
+
+static inline long syscall_get_return_value(struct task_struct *task,
+					    struct pt_regs *regs)
+{
+	return regs->areg[2];
+}
+
+static inline void syscall_set_return_value(struct task_struct *task,
+					    struct pt_regs *regs,
+					    int error, long val)
+{
+	regs->areg[2] = (long) error ? error : val;
+}
+
+#define SYSCALL_MAX_ARGS 6
+#define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9}
+
+static inline void syscall_get_arguments(struct task_struct *task,
+					 struct pt_regs *regs,
+					 unsigned long *args)
+{
+	static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
+	unsigned int i;
+
+	for (i = 0; i < 6; ++i)
+		args[i] = regs->areg[reg[i]];
+}
+
+asmlinkage long xtensa_rt_sigreturn(void);
+asmlinkage long xtensa_shmat(int, char __user *, int);
+asmlinkage long xtensa_fadvise64_64(int, int,
+				    unsigned long long, unsigned long long);
+
+#endif
diff --git a/arch/xtensa/include/asm/sysmem.h b/arch/xtensa/include/asm/sysmem.h
new file mode 100644
index 000000000..552cdfd85
--- /dev/null
+++ b/arch/xtensa/include/asm/sysmem.h
@@ -0,0 +1,19 @@
+/*
+ * sysmem-related prototypes.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2014 Cadence Design Systems Inc.
+ */
+
+#ifndef _XTENSA_SYSMEM_H
+#define _XTENSA_SYSMEM_H
+
+#include <linux/memblock.h>
+
+void bootmem_init(void);
+void zones_init(void);
+
+#endif /* _XTENSA_SYSMEM_H */
diff --git a/arch/xtensa/include/asm/thread_info.h b/arch/xtensa/include/asm/thread_info.h
new file mode 100644
index 000000000..326db1c1d
--- /dev/null
+++ b/arch/xtensa/include/asm/thread_info.h
@@ -0,0 +1,145 @@
+/*
+ * include/asm-xtensa/thread_info.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_THREAD_INFO_H
+#define _XTENSA_THREAD_INFO_H
+
+#include <linux/stringify.h>
+#include <asm/kmem_layout.h>
+
+#define CURRENT_SHIFT KERNEL_STACK_SHIFT
+
+#ifndef __ASSEMBLY__
+# include <asm/processor.h>
+#endif
+
+/*
+ * low level task data that entry.S needs immediate access to
+ * - this struct should fit entirely inside of one cache line
+ * - this struct shares the supervisor stack pages
+ * - if the contents of this structure are changed, the assembly constants
+ *   must also be changed
+ */
+
+#ifndef __ASSEMBLY__
+
+#if XTENSA_HAVE_COPROCESSORS
+
+typedef struct xtregs_coprocessor {
+	xtregs_cp0_t cp0;
+	xtregs_cp1_t cp1;
+	xtregs_cp2_t cp2;
+	xtregs_cp3_t cp3;
+	xtregs_cp4_t cp4;
+	xtregs_cp5_t cp5;
+	xtregs_cp6_t cp6;
+	xtregs_cp7_t cp7;
+} xtregs_coprocessor_t;
+
+#endif
+
+struct thread_info {
+	struct task_struct	*task;		/* main task structure */
+	unsigned long		flags;		/* low level flags */
+	unsigned long		status;		/* thread-synchronous flags */
+	__u32			cpu;		/* current CPU */
+	__s32			preempt_count;	/* 0 => preemptable,< 0 => BUG*/
+
+#if XCHAL_HAVE_EXCLUSIVE
+	/* result of the most recent exclusive store */
+	unsigned long		atomctl8;
+#endif
+#ifdef CONFIG_USER_ABI_CALL0_PROBE
+	/* Address where PS.WOE was enabled by the ABI probing code */
+	unsigned long		ps_woe_fix_addr;
+#endif
+
+	/*
+	 * If i-th bit is set then coprocessor state is loaded into the
+	 * coprocessor i on CPU cp_owner_cpu.
+	 */
+	unsigned long		cpenable;
+	u32			cp_owner_cpu;
+	/* Allocate storage for extra user states and coprocessor states. */
+#if XTENSA_HAVE_COPROCESSORS
+	xtregs_coprocessor_t	xtregs_cp;
+#endif
+	xtregs_user_t		xtregs_user;
+};
+
+#endif
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ */
+
+#ifndef __ASSEMBLY__
+
+#define INIT_THREAD_INFO(tsk)			\
+{						\
+	.task		= &tsk,			\
+	.flags		= 0,			\
+	.cpu		= 0,			\
+	.preempt_count	= INIT_PREEMPT_COUNT,	\
+}
+
+/* how to get the thread information struct from C */
+static inline struct thread_info *current_thread_info(void)
+{
+	struct thread_info *ti;
+	 __asm__("extui %0, a1, 0, "__stringify(CURRENT_SHIFT)"\n\t"
+	         "xor %0, a1, %0" : "=&r" (ti) : );
+	return ti;
+}
+
+#else /* !__ASSEMBLY__ */
+
+/* how to get the thread information struct from ASM */
+#define GET_THREAD_INFO(reg,sp) \
+	extui reg, sp, 0, CURRENT_SHIFT; \
+	xor   reg, sp, reg
+#endif
+
+
+/*
+ * thread information flags
+ * - these are process state flags that various assembly files may need to access
+ */
+#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
+#define TIF_SIGPENDING		1	/* signal pending */
+#define TIF_NEED_RESCHED	2	/* rescheduling necessary */
+#define TIF_SINGLESTEP		3	/* restore singlestep on return to user mode */
+#define TIF_SYSCALL_TRACEPOINT	4	/* syscall tracepoint instrumentation */
+#define TIF_NOTIFY_SIGNAL	5	/* signal notifications exist */
+#define TIF_RESTORE_SIGMASK	6	/* restore signal mask in do_signal() */
+#define TIF_NOTIFY_RESUME	7	/* callback before returning to user */
+#define TIF_DB_DISABLED		8	/* debug trap disabled for syscall */
+#define TIF_SYSCALL_AUDIT	9	/* syscall auditing active */
+#define TIF_SECCOMP		10	/* secure computing */
+#define TIF_MEMDIE		11	/* is terminating due to OOM killer */
+
+#define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
+#define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
+#define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
+#define _TIF_SINGLESTEP		(1<<TIF_SINGLESTEP)
+#define _TIF_SYSCALL_TRACEPOINT	(1<<TIF_SYSCALL_TRACEPOINT)
+#define _TIF_NOTIFY_SIGNAL	(1<<TIF_NOTIFY_SIGNAL)
+#define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)
+#define _TIF_SYSCALL_AUDIT	(1<<TIF_SYSCALL_AUDIT)
+#define _TIF_SECCOMP		(1<<TIF_SECCOMP)
+
+#define _TIF_WORK_MASK		(_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
+				 _TIF_SYSCALL_TRACEPOINT | \
+				 _TIF_SYSCALL_AUDIT | _TIF_SECCOMP)
+
+#define THREAD_SIZE KERNEL_STACK_SIZE
+#define THREAD_SIZE_ORDER (KERNEL_STACK_SHIFT - PAGE_SHIFT)
+
+#endif	/* _XTENSA_THREAD_INFO */
diff --git a/arch/xtensa/include/asm/timex.h b/arch/xtensa/include/asm/timex.h
new file mode 100644
index 000000000..3f2462f2d
--- /dev/null
+++ b/arch/xtensa/include/asm/timex.h
@@ -0,0 +1,60 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2013 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_TIMEX_H
+#define _XTENSA_TIMEX_H
+
+#include <asm/processor.h>
+
+#if XCHAL_NUM_TIMERS > 0 && \
+	XTENSA_INT_LEVEL(XCHAL_TIMER0_INTERRUPT) <= XCHAL_EXCM_LEVEL
+# define LINUX_TIMER     0
+# define LINUX_TIMER_INT XCHAL_TIMER0_INTERRUPT
+#elif XCHAL_NUM_TIMERS > 1 && \
+	XTENSA_INT_LEVEL(XCHAL_TIMER1_INTERRUPT) <= XCHAL_EXCM_LEVEL
+# define LINUX_TIMER     1
+# define LINUX_TIMER_INT XCHAL_TIMER1_INTERRUPT
+#elif XCHAL_NUM_TIMERS > 2 && \
+	XTENSA_INT_LEVEL(XCHAL_TIMER2_INTERRUPT) <= XCHAL_EXCM_LEVEL
+# define LINUX_TIMER     2
+# define LINUX_TIMER_INT XCHAL_TIMER2_INTERRUPT
+#else
+# error "Bad timer number for Linux configurations!"
+#endif
+
+extern unsigned long ccount_freq;
+
+void local_timer_setup(unsigned cpu);
+
+/*
+ * Register access.
+ */
+
+static inline unsigned long get_ccount (void)
+{
+	return xtensa_get_sr(ccount);
+}
+
+static inline void set_ccount (unsigned long ccount)
+{
+	xtensa_set_sr(ccount, ccount);
+}
+
+static inline unsigned long get_linux_timer (void)
+{
+	return xtensa_get_sr(SREG_CCOMPARE + LINUX_TIMER);
+}
+
+static inline void set_linux_timer (unsigned long ccompare)
+{
+	xtensa_set_sr(ccompare, SREG_CCOMPARE + LINUX_TIMER);
+}
+
+#include <asm-generic/timex.h>
+
+#endif	/* _XTENSA_TIMEX_H */
diff --git a/arch/xtensa/include/asm/tlb.h b/arch/xtensa/include/asm/tlb.h
new file mode 100644
index 000000000..508899351
--- /dev/null
+++ b/arch/xtensa/include/asm/tlb.h
@@ -0,0 +1,21 @@
+/*
+ * include/asm-xtensa/tlb.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_TLB_H
+#define _XTENSA_TLB_H
+
+#include <asm/cache.h>
+#include <asm/page.h>
+
+#include <asm-generic/tlb.h>
+
+#define __pte_free_tlb(tlb, pte, address)	pte_free((tlb)->mm, pte)
+
+#endif	/* _XTENSA_TLB_H */
diff --git a/arch/xtensa/include/asm/tlbflush.h b/arch/xtensa/include/asm/tlbflush.h
new file mode 100644
index 000000000..573df8cea
--- /dev/null
+++ b/arch/xtensa/include/asm/tlbflush.h
@@ -0,0 +1,205 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2013 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_TLBFLUSH_H
+#define _XTENSA_TLBFLUSH_H
+
+#include <linux/stringify.h>
+#include <asm/processor.h>
+
+#define DTLB_WAY_PGD	7
+
+#define ITLB_ARF_WAYS	4
+#define DTLB_ARF_WAYS	4
+
+#define ITLB_HIT_BIT	3
+#define DTLB_HIT_BIT	4
+
+#ifndef __ASSEMBLY__
+
+/* TLB flushing:
+ *
+ *  - flush_tlb_all() flushes all processes TLB entries
+ *  - flush_tlb_mm(mm) flushes the specified mm context TLB entries
+ *  - flush_tlb_page(vma, page) flushes a single page
+ *  - flush_tlb_range(vma, vmaddr, end) flushes a range of pages
+ */
+
+void local_flush_tlb_all(void);
+void local_flush_tlb_mm(struct mm_struct *mm);
+void local_flush_tlb_page(struct vm_area_struct *vma,
+		unsigned long page);
+void local_flush_tlb_range(struct vm_area_struct *vma,
+		unsigned long start, unsigned long end);
+void local_flush_tlb_kernel_range(unsigned long start, unsigned long end);
+
+#ifdef CONFIG_SMP
+
+void flush_tlb_all(void);
+void flush_tlb_mm(struct mm_struct *);
+void flush_tlb_page(struct vm_area_struct *, unsigned long);
+void flush_tlb_range(struct vm_area_struct *, unsigned long,
+		unsigned long);
+void flush_tlb_kernel_range(unsigned long start, unsigned long end);
+
+#else /* !CONFIG_SMP */
+
+#define flush_tlb_all()			   local_flush_tlb_all()
+#define flush_tlb_mm(mm)		   local_flush_tlb_mm(mm)
+#define flush_tlb_page(vma, page)	   local_flush_tlb_page(vma, page)
+#define flush_tlb_range(vma, vmaddr, end)  local_flush_tlb_range(vma, vmaddr, \
+								 end)
+#define flush_tlb_kernel_range(start, end) local_flush_tlb_kernel_range(start, \
+									end)
+
+#endif /* CONFIG_SMP */
+
+/* TLB operations. */
+
+static inline unsigned long itlb_probe(unsigned long addr)
+{
+	unsigned long tmp;
+	__asm__ __volatile__("pitlb  %0, %1\n\t" : "=a" (tmp) : "a" (addr));
+	return tmp;
+}
+
+static inline unsigned long dtlb_probe(unsigned long addr)
+{
+	unsigned long tmp;
+	__asm__ __volatile__("pdtlb  %0, %1\n\t" : "=a" (tmp) : "a" (addr));
+	return tmp;
+}
+
+static inline void invalidate_itlb_entry (unsigned long probe)
+{
+	__asm__ __volatile__("iitlb  %0; isync\n\t" : : "a" (probe));
+}
+
+static inline void invalidate_dtlb_entry (unsigned long probe)
+{
+	__asm__ __volatile__("idtlb  %0; dsync\n\t" : : "a" (probe));
+}
+
+/* Use the .._no_isync functions with caution.  Generally, these are
+ * handy for bulk invalidates followed by a single 'isync'.  The
+ * caller must follow up with an 'isync', which can be relatively
+ * expensive on some Xtensa implementations.
+ */
+static inline void invalidate_itlb_entry_no_isync (unsigned entry)
+{
+	/* Caller must follow up with 'isync'. */
+	__asm__ __volatile__ ("iitlb  %0\n" : : "a" (entry) );
+}
+
+static inline void invalidate_dtlb_entry_no_isync (unsigned entry)
+{
+	/* Caller must follow up with 'isync'. */
+	__asm__ __volatile__ ("idtlb  %0\n" : : "a" (entry) );
+}
+
+static inline void set_itlbcfg_register (unsigned long val)
+{
+	__asm__ __volatile__("wsr  %0, itlbcfg\n\t" "isync\n\t"
+			     : : "a" (val));
+}
+
+static inline void set_dtlbcfg_register (unsigned long val)
+{
+	__asm__ __volatile__("wsr  %0, dtlbcfg; dsync\n\t"
+	    		     : : "a" (val));
+}
+
+static inline void set_ptevaddr_register (unsigned long val)
+{
+	__asm__ __volatile__(" wsr  %0, ptevaddr; isync\n"
+			     : : "a" (val));
+}
+
+static inline unsigned long read_ptevaddr_register (void)
+{
+	unsigned long tmp;
+	__asm__ __volatile__("rsr  %0, ptevaddr\n\t" : "=a" (tmp));
+	return tmp;
+}
+
+static inline void write_dtlb_entry (pte_t entry, int way)
+{
+	__asm__ __volatile__("wdtlb  %1, %0; dsync\n\t"
+			     : : "r" (way), "r" (entry) );
+}
+
+static inline void write_itlb_entry (pte_t entry, int way)
+{
+	__asm__ __volatile__("witlb  %1, %0; isync\n\t"
+	                     : : "r" (way), "r" (entry) );
+}
+
+static inline void invalidate_page_directory (void)
+{
+	invalidate_dtlb_entry (DTLB_WAY_PGD);
+	invalidate_dtlb_entry (DTLB_WAY_PGD+1);
+	invalidate_dtlb_entry (DTLB_WAY_PGD+2);
+}
+
+static inline void invalidate_itlb_mapping (unsigned address)
+{
+	unsigned long tlb_entry;
+	if (((tlb_entry = itlb_probe(address)) & (1 << ITLB_HIT_BIT)) != 0)
+		invalidate_itlb_entry(tlb_entry);
+}
+
+static inline void invalidate_dtlb_mapping (unsigned address)
+{
+	unsigned long tlb_entry;
+	if (((tlb_entry = dtlb_probe(address)) & (1 << DTLB_HIT_BIT)) != 0)
+		invalidate_dtlb_entry(tlb_entry);
+}
+
+/*
+ * DO NOT USE THESE FUNCTIONS.  These instructions aren't part of the Xtensa
+ * ISA and exist only for test purposes..
+ * You may find it helpful for MMU debugging, however.
+ *
+ * 'at' is the unmodified input register
+ * 'as' is the output register, as follows (specific to the Linux config):
+ *
+ *      as[31..12] contain the virtual address
+ *      as[11..08] are meaningless
+ *      as[07..00] contain the asid
+ */
+
+static inline unsigned long read_dtlb_virtual (int way)
+{
+	unsigned long tmp;
+	__asm__ __volatile__("rdtlb0  %0, %1\n\t" : "=a" (tmp), "+a" (way));
+	return tmp;
+}
+
+static inline unsigned long read_dtlb_translation (int way)
+{
+	unsigned long tmp;
+	__asm__ __volatile__("rdtlb1  %0, %1\n\t" : "=a" (tmp), "+a" (way));
+	return tmp;
+}
+
+static inline unsigned long read_itlb_virtual (int way)
+{
+	unsigned long tmp;
+	__asm__ __volatile__("ritlb0  %0, %1\n\t" : "=a" (tmp), "+a" (way));
+	return tmp;
+}
+
+static inline unsigned long read_itlb_translation (int way)
+{
+	unsigned long tmp;
+	__asm__ __volatile__("ritlb1  %0, %1\n\t" : "=a" (tmp), "+a" (way));
+	return tmp;
+}
+
+#endif	/* __ASSEMBLY__ */
+#endif	/* _XTENSA_TLBFLUSH_H */
diff --git a/arch/xtensa/include/asm/traps.h b/arch/xtensa/include/asm/traps.h
new file mode 100644
index 000000000..6f74ccc0c
--- /dev/null
+++ b/arch/xtensa/include/asm/traps.h
@@ -0,0 +1,138 @@
+/*
+ * arch/xtensa/include/asm/traps.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2012 Tensilica Inc.
+ */
+#ifndef _XTENSA_TRAPS_H
+#define _XTENSA_TRAPS_H
+
+#include <asm/ptrace.h>
+
+typedef void xtensa_exception_handler(struct pt_regs *regs);
+
+/*
+ * Per-CPU exception handling data structure.
+ * EXCSAVE1 points to it.
+ */
+struct exc_table {
+	/* Kernel Stack */
+	void *kstk;
+	/* Double exception save area for a0 */
+	unsigned long double_save;
+	/* Fixup handler */
+	void *fixup;
+	/* For passing a parameter to fixup */
+	void *fixup_param;
+#if XTENSA_HAVE_COPROCESSORS
+	/* Pointers to owner struct thread_info */
+	struct thread_info *coprocessor_owner[XCHAL_CP_MAX];
+#endif
+	/* Fast user exception handlers */
+	void *fast_user_handler[EXCCAUSE_N];
+	/* Fast kernel exception handlers */
+	void *fast_kernel_handler[EXCCAUSE_N];
+	/* Default C-Handlers */
+	xtensa_exception_handler *default_handler[EXCCAUSE_N];
+};
+
+DECLARE_PER_CPU(struct exc_table, exc_table);
+
+xtensa_exception_handler *
+__init trap_set_handler(int cause, xtensa_exception_handler *handler);
+
+asmlinkage void fast_illegal_instruction_user(void);
+asmlinkage void fast_syscall_user(void);
+asmlinkage void fast_alloca(void);
+asmlinkage void fast_unaligned(void);
+asmlinkage void fast_second_level_miss(void);
+asmlinkage void fast_store_prohibited(void);
+asmlinkage void fast_coprocessor(void);
+
+asmlinkage void kernel_exception(void);
+asmlinkage void user_exception(void);
+asmlinkage void system_call(struct pt_regs *regs);
+
+void do_IRQ(int hwirq, struct pt_regs *regs);
+void do_page_fault(struct pt_regs *regs);
+void do_unhandled(struct pt_regs *regs);
+
+/* Initialize minimal exc_table structure sufficient for basic paging */
+static inline void __init early_trap_init(void)
+{
+	static struct exc_table init_exc_table __initdata = {
+		.fast_kernel_handler[EXCCAUSE_DTLB_MISS] =
+			fast_second_level_miss,
+	};
+	xtensa_set_sr(&init_exc_table, excsave1);
+}
+
+void secondary_trap_init(void);
+
+static inline void spill_registers(void)
+{
+#if defined(__XTENSA_WINDOWED_ABI__)
+#if XCHAL_NUM_AREGS > 16
+	__asm__ __volatile__ (
+		"	call8	1f\n"
+		"	_j	2f\n"
+		"	retw\n"
+		"	.align	4\n"
+		"1:\n"
+#if XCHAL_NUM_AREGS == 32
+		"	_entry	a1, 32\n"
+		"	addi	a8, a0, 3\n"
+		"	_entry	a1, 16\n"
+		"	mov	a12, a12\n"
+		"	retw\n"
+#else
+		"	_entry	a1, 48\n"
+		"	call12	1f\n"
+		"	retw\n"
+		"	.align	4\n"
+		"1:\n"
+		"	.rept	(" __stringify(XCHAL_NUM_AREGS) " - 16) / 12\n"
+		"	_entry	a1, 48\n"
+		"	mov	a12, a0\n"
+		"	.endr\n"
+		"	_entry	a1, 16\n"
+#if XCHAL_NUM_AREGS % 12 == 0
+		"	mov	a12, a12\n"
+#elif XCHAL_NUM_AREGS % 12 == 4
+		"	mov	a4, a4\n"
+#elif XCHAL_NUM_AREGS % 12 == 8
+		"	mov	a8, a8\n"
+#endif
+		"	retw\n"
+#endif
+		"2:\n"
+		: : : "a8", "a9", "memory");
+#else
+	__asm__ __volatile__ (
+		"	mov	a12, a12\n"
+		: : : "memory");
+#endif
+#endif
+}
+
+struct debug_table {
+	/* Pointer to debug exception handler */
+	void (*debug_exception)(void);
+	/* Temporary register save area */
+	unsigned long debug_save[1];
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+	/* Save area for DBREAKC registers */
+	unsigned long dbreakc_save[XCHAL_NUM_DBREAK];
+	/* Saved ICOUNT register */
+	unsigned long icount_save;
+	/* Saved ICOUNTLEVEL register */
+	unsigned long icount_level_save;
+#endif
+};
+
+void debug_exception(void);
+
+#endif /* _XTENSA_TRAPS_H */
diff --git a/arch/xtensa/include/asm/uaccess.h b/arch/xtensa/include/asm/uaccess.h
new file mode 100644
index 000000000..56aec6d50
--- /dev/null
+++ b/arch/xtensa/include/asm/uaccess.h
@@ -0,0 +1,295 @@
+/*
+ * include/asm-xtensa/uaccess.h
+ *
+ * User space memory access functions
+ *
+ * These routines provide basic accessing functions to the user memory
+ * space for the kernel. This header file provides functions such as:
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_UACCESS_H
+#define _XTENSA_UACCESS_H
+
+#include <linux/prefetch.h>
+#include <asm/types.h>
+#include <asm/extable.h>
+#include <asm-generic/access_ok.h>
+
+/*
+ * These are the main single-value transfer routines.  They
+ * automatically use the right size if we just have the right pointer
+ * type.
+ *
+ * This gets kind of ugly. We want to return _two_ values in
+ * "get_user()" and yet we don't want to do any pointers, because that
+ * is too much of a performance impact. Thus we have a few rather ugly
+ * macros here, and hide all the uglyness from the user.
+ *
+ * Careful to not
+ * (a) re-use the arguments for side effects (sizeof is ok)
+ * (b) require any knowledge of processes at this stage
+ */
+#define put_user(x, ptr)	__put_user_check((x), (ptr), sizeof(*(ptr)))
+#define get_user(x, ptr) __get_user_check((x), (ptr), sizeof(*(ptr)))
+
+/*
+ * The "__xxx" versions of the user access functions are versions that
+ * do not verify the address space, that must have been done previously
+ * with a separate "access_ok()" call (this is used when we do multiple
+ * accesses to the same area of user memory).
+ */
+#define __put_user(x, ptr) __put_user_nocheck((x), (ptr), sizeof(*(ptr)))
+#define __get_user(x, ptr) __get_user_nocheck((x), (ptr), sizeof(*(ptr)))
+
+
+extern long __put_user_bad(void);
+
+#define __put_user_nocheck(x, ptr, size)		\
+({							\
+	long __pu_err;					\
+	__put_user_size((x), (ptr), (size), __pu_err);	\
+	__pu_err;					\
+})
+
+#define __put_user_check(x, ptr, size)					\
+({									\
+	long __pu_err = -EFAULT;					\
+	__typeof__(*(ptr)) __user *__pu_addr = (ptr);			\
+	if (access_ok(__pu_addr, size))			\
+		__put_user_size((x), __pu_addr, (size), __pu_err);	\
+	__pu_err;							\
+})
+
+#define __put_user_size(x, ptr, size, retval)				\
+do {									\
+	int __cb;							\
+	retval = 0;							\
+	switch (size) {							\
+	case 1: __put_user_asm(x, ptr, retval, 1, "s8i", __cb);  break;	\
+	case 2: __put_user_asm(x, ptr, retval, 2, "s16i", __cb); break;	\
+	case 4: __put_user_asm(x, ptr, retval, 4, "s32i", __cb); break;	\
+	case 8: {							\
+		     __typeof__(*ptr) __v64 = x;			\
+		     retval = __copy_to_user(ptr, &__v64, 8) ? -EFAULT : 0;	\
+		     break;						\
+	        }							\
+	default: __put_user_bad();					\
+	}								\
+} while (0)
+
+
+/*
+ * Consider a case of a user single load/store would cause both an
+ * unaligned exception and an MMU-related exception (unaligned
+ * exceptions happen first):
+ *
+ * User code passes a bad variable ptr to a system call.
+ * Kernel tries to access the variable.
+ * Unaligned exception occurs.
+ * Unaligned exception handler tries to make aligned accesses.
+ * Double exception occurs for MMU-related cause (e.g., page not mapped).
+ * do_page_fault() thinks the fault address belongs to the kernel, not the
+ * user, and panics.
+ *
+ * The kernel currently prohibits user unaligned accesses.  We use the
+ * __check_align_* macros to check for unaligned addresses before
+ * accessing user space so we don't crash the kernel.  Both
+ * __put_user_asm and __get_user_asm use these alignment macros, so
+ * macro-specific labels such as 0f, 1f, %0, %2, and %3 must stay in
+ * sync.
+ */
+
+#define __check_align_1  ""
+
+#define __check_align_2				\
+	"   _bbci.l %[mem] * 0, 1f	\n"	\
+	"   movi    %[err], %[efault]	\n"	\
+	"   _j      2f			\n"
+
+#define __check_align_4				\
+	"   _bbsi.l %[mem] * 0, 0f	\n"	\
+	"   _bbci.l %[mem] * 0 + 1, 1f	\n"	\
+	"0: movi    %[err], %[efault]	\n"	\
+	"   _j      2f			\n"
+
+
+/*
+ * We don't tell gcc that we are accessing memory, but this is OK
+ * because we do not write to any memory gcc knows about, so there
+ * are no aliasing issues.
+ *
+ * WARNING: If you modify this macro at all, verify that the
+ * __check_align_* macros still work.
+ */
+#define __put_user_asm(x_, addr_, err_, align, insn, cb)\
+__asm__ __volatile__(					\
+	__check_align_##align				\
+	"1: "insn"  %[x], %[mem]	\n"		\
+	"2:				\n"		\
+	"   .section  .fixup,\"ax\"	\n"		\
+	"   .align 4			\n"		\
+	"   .literal_position		\n"		\
+	"5:				\n"		\
+	"   movi   %[tmp], 2b		\n"		\
+	"   movi   %[err], %[efault]	\n"		\
+	"   jx     %[tmp]		\n"		\
+	"   .previous			\n"		\
+	"   .section  __ex_table,\"a\"	\n"		\
+	"   .long	1b, 5b		\n"		\
+	"   .previous"					\
+	:[err] "+r"(err_), [tmp] "=r"(cb), [mem] "=m"(*(addr_))		\
+	:[x] "r"(x_), [efault] "i"(-EFAULT))
+
+#define __get_user_nocheck(x, ptr, size)			\
+({								\
+	long __gu_err;						\
+	__get_user_size((x), (ptr), (size), __gu_err);		\
+	__gu_err;						\
+})
+
+#define __get_user_check(x, ptr, size)					\
+({									\
+	long __gu_err = -EFAULT;					\
+	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);		\
+	if (access_ok(__gu_addr, size))					\
+		__get_user_size((x), __gu_addr, (size), __gu_err);	\
+	else								\
+		(x) = (__typeof__(*(ptr)))0;				\
+	__gu_err;							\
+})
+
+extern long __get_user_bad(void);
+
+#define __get_user_size(x, ptr, size, retval)				\
+do {									\
+	int __cb;							\
+	retval = 0;							\
+	switch (size) {							\
+	case 1: __get_user_asm(x, ptr, retval, 1, "l8ui", __cb);  break;\
+	case 2: __get_user_asm(x, ptr, retval, 2, "l16ui", __cb); break;\
+	case 4: __get_user_asm(x, ptr, retval, 4, "l32i", __cb);  break;\
+	case 8: {							\
+		u64 __x;						\
+		if (unlikely(__copy_from_user(&__x, ptr, 8))) {		\
+			retval = -EFAULT;				\
+			(x) = (__typeof__(*(ptr)))0;			\
+		} else {						\
+			(x) = *(__force __typeof__(*(ptr)) *)&__x;	\
+		}							\
+		break;							\
+	}								\
+	default:							\
+		(x) = (__typeof__(*(ptr)))0;				\
+		__get_user_bad();					\
+	}								\
+} while (0)
+
+
+/*
+ * WARNING: If you modify this macro at all, verify that the
+ * __check_align_* macros still work.
+ */
+#define __get_user_asm(x_, addr_, err_, align, insn, cb) \
+do {							\
+	u32 __x = 0;					\
+	__asm__ __volatile__(				\
+		__check_align_##align			\
+		"1: "insn"  %[x], %[mem]	\n"	\
+		"2:				\n"	\
+		"   .section  .fixup,\"ax\"	\n"	\
+		"   .align 4			\n"	\
+		"   .literal_position		\n"	\
+		"5:				\n"	\
+		"   movi   %[tmp], 2b		\n"	\
+		"   movi   %[err], %[efault]	\n"	\
+		"   jx     %[tmp]		\n"	\
+		"   .previous			\n"	\
+		"   .section  __ex_table,\"a\"	\n"	\
+		"   .long	1b, 5b		\n"	\
+		"   .previous"				\
+		:[err] "+r"(err_), [tmp] "=r"(cb), [x] "+r"(__x) \
+		:[mem] "m"(*(addr_)), [efault] "i"(-EFAULT)); \
+	(x_) = (__force __typeof__(*(addr_)))__x;	\
+} while (0)
+
+
+/*
+ * Copy to/from user space
+ */
+
+extern unsigned __xtensa_copy_user(void *to, const void *from, unsigned n);
+
+static inline unsigned long
+raw_copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+	prefetchw(to);
+	return __xtensa_copy_user(to, (__force const void *)from, n);
+}
+static inline unsigned long
+raw_copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+	prefetch(from);
+	return __xtensa_copy_user((__force void *)to, from, n);
+}
+#define INLINE_COPY_FROM_USER
+#define INLINE_COPY_TO_USER
+
+/*
+ * We need to return the number of bytes not cleared.  Our memset()
+ * returns zero if a problem occurs while accessing user-space memory.
+ * In that event, return no memory cleared.  Otherwise, zero for
+ * success.
+ */
+
+static inline unsigned long
+__xtensa_clear_user(void __user *addr, unsigned long size)
+{
+	if (!__memset((void __force *)addr, 0, size))
+		return size;
+	return 0;
+}
+
+static inline unsigned long
+clear_user(void __user *addr, unsigned long size)
+{
+	if (access_ok(addr, size))
+		return __xtensa_clear_user(addr, size);
+	return size ? -EFAULT : 0;
+}
+
+#define __clear_user  __xtensa_clear_user
+
+
+#ifdef CONFIG_ARCH_HAS_STRNCPY_FROM_USER
+extern long __strncpy_user(char *dst, const char __user *src, long count);
+
+static inline long
+strncpy_from_user(char *dst, const char __user *src, long count)
+{
+	if (access_ok(src, 1))
+		return __strncpy_user(dst, src, count);
+	return -EFAULT;
+}
+#else
+long strncpy_from_user(char *dst, const char __user *src, long count);
+#endif
+
+/*
+ * Return the size of a string (including the ending 0!)
+ */
+extern long __strnlen_user(const char __user *str, long len);
+
+static inline long strnlen_user(const char __user *str, long len)
+{
+	if (!access_ok(str, 1))
+		return 0;
+	return __strnlen_user(str, len);
+}
+
+#endif	/* _XTENSA_UACCESS_H */
diff --git a/arch/xtensa/include/asm/ucontext.h b/arch/xtensa/include/asm/ucontext.h
new file mode 100644
index 000000000..94c94ed3e
--- /dev/null
+++ b/arch/xtensa/include/asm/ucontext.h
@@ -0,0 +1,22 @@
+/*
+ * include/asm-xtensa/ucontext.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_UCONTEXT_H
+#define _XTENSA_UCONTEXT_H
+
+struct ucontext {
+	unsigned long	  uc_flags;
+	struct ucontext  *uc_link;
+	stack_t		  uc_stack;
+	struct sigcontext uc_mcontext;
+	sigset_t	  uc_sigmask;	/* mask last for extensibility */
+};
+
+#endif /* _XTENSA_UCONTEXT_H */
diff --git a/arch/xtensa/include/asm/unistd.h b/arch/xtensa/include/asm/unistd.h
new file mode 100644
index 000000000..b52236245
--- /dev/null
+++ b/arch/xtensa/include/asm/unistd.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _XTENSA_UNISTD_H
+#define _XTENSA_UNISTD_H
+
+#define __ARCH_WANT_SYS_CLONE
+#define __ARCH_WANT_SYS_CLONE3
+#include <uapi/asm/unistd.h>
+
+#define __ARCH_WANT_NEW_STAT
+#define __ARCH_WANT_STAT64
+#define __ARCH_WANT_SYS_UTIME32
+#define __ARCH_WANT_SYS_GETPGRP
+
+#define NR_syscalls				__NR_syscalls
+
+#endif /* _XTENSA_UNISTD_H */
diff --git a/arch/xtensa/include/asm/vectors.h b/arch/xtensa/include/asm/vectors.h
new file mode 100644
index 000000000..704286c35
--- /dev/null
+++ b/arch/xtensa/include/asm/vectors.h
@@ -0,0 +1,93 @@
+/*
+ * arch/xtensa/include/asm/xchal_vaddr_remap.h
+ *
+ * Xtensa macros for MMU V3 Support. Deals with re-mapping the Virtual
+ * Memory Addresses from "Virtual == Physical" to their prevvious V2 MMU
+ * mappings (KSEG at 0xD0000000 and KIO at 0XF0000000).
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2008 - 2012 Tensilica Inc.
+ *
+ * Pete Delaney <piet@tensilica.com>
+ * Marc Gauthier <marc@tensilica.com
+ */
+
+#ifndef _XTENSA_VECTORS_H
+#define _XTENSA_VECTORS_H
+
+#include <asm/core.h>
+#include <asm/kmem_layout.h>
+
+#if defined(CONFIG_MMU) && XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
+#ifdef CONFIG_KERNEL_VIRTUAL_ADDRESS
+#define KERNELOFFSET			CONFIG_KERNEL_VIRTUAL_ADDRESS
+#else
+#define KERNELOFFSET			(CONFIG_KERNEL_LOAD_ADDRESS + \
+					 XCHAL_KSEG_CACHED_VADDR - \
+					 XCHAL_KSEG_PADDR)
+#endif
+#else
+#define KERNELOFFSET			CONFIG_KERNEL_LOAD_ADDRESS
+#endif
+
+#define RESET_VECTOR1_VADDR		(XCHAL_RESET_VECTOR1_VADDR)
+#ifdef CONFIG_VECTORS_ADDR
+#define VECBASE_VADDR			(CONFIG_VECTORS_ADDR)
+#else
+#define VECBASE_VADDR			_vecbase
+#endif
+
+#if XCHAL_HAVE_VECBASE
+
+#define VECTOR_VADDR(offset)		(VECBASE_VADDR + offset)
+
+#define USER_VECTOR_VADDR		VECTOR_VADDR(XCHAL_USER_VECOFS)
+#define KERNEL_VECTOR_VADDR		VECTOR_VADDR(XCHAL_KERNEL_VECOFS)
+#define DOUBLEEXC_VECTOR_VADDR		VECTOR_VADDR(XCHAL_DOUBLEEXC_VECOFS)
+#define WINDOW_VECTORS_VADDR		VECTOR_VADDR(XCHAL_WINDOW_OF4_VECOFS)
+#define INTLEVEL2_VECTOR_VADDR		VECTOR_VADDR(XCHAL_INTLEVEL2_VECOFS)
+#define INTLEVEL3_VECTOR_VADDR		VECTOR_VADDR(XCHAL_INTLEVEL3_VECOFS)
+#define INTLEVEL4_VECTOR_VADDR		VECTOR_VADDR(XCHAL_INTLEVEL4_VECOFS)
+#define INTLEVEL5_VECTOR_VADDR		VECTOR_VADDR(XCHAL_INTLEVEL5_VECOFS)
+#define INTLEVEL6_VECTOR_VADDR		VECTOR_VADDR(XCHAL_INTLEVEL6_VECOFS)
+#define INTLEVEL7_VECTOR_VADDR		VECTOR_VADDR(XCHAL_INTLEVEL7_VECOFS)
+#define DEBUG_VECTOR_VADDR		VECTOR_VADDR(XCHAL_DEBUG_VECOFS)
+
+/*
+ * These XCHAL_* #defines from varian/core.h
+ * are not valid to use with V3 MMU. Non-XCHAL
+ * constants are defined above and should be used.
+ */
+#undef  XCHAL_VECBASE_RESET_VADDR
+#undef  XCHAL_USER_VECTOR_VADDR
+#undef  XCHAL_KERNEL_VECTOR_VADDR
+#undef  XCHAL_DOUBLEEXC_VECTOR_VADDR
+#undef  XCHAL_WINDOW_VECTORS_VADDR
+#undef  XCHAL_INTLEVEL2_VECTOR_VADDR
+#undef  XCHAL_INTLEVEL3_VECTOR_VADDR
+#undef  XCHAL_INTLEVEL4_VECTOR_VADDR
+#undef  XCHAL_INTLEVEL5_VECTOR_VADDR
+#undef  XCHAL_INTLEVEL6_VECTOR_VADDR
+#undef  XCHAL_INTLEVEL7_VECTOR_VADDR
+#undef  XCHAL_DEBUG_VECTOR_VADDR
+
+#else
+
+#define USER_VECTOR_VADDR		XCHAL_USER_VECTOR_VADDR
+#define KERNEL_VECTOR_VADDR		XCHAL_KERNEL_VECTOR_VADDR
+#define DOUBLEEXC_VECTOR_VADDR		XCHAL_DOUBLEEXC_VECTOR_VADDR
+#define WINDOW_VECTORS_VADDR		XCHAL_WINDOW_VECTORS_VADDR
+#define INTLEVEL2_VECTOR_VADDR		XCHAL_INTLEVEL2_VECTOR_VADDR
+#define INTLEVEL3_VECTOR_VADDR		XCHAL_INTLEVEL3_VECTOR_VADDR
+#define INTLEVEL4_VECTOR_VADDR		XCHAL_INTLEVEL4_VECTOR_VADDR
+#define INTLEVEL5_VECTOR_VADDR		XCHAL_INTLEVEL5_VECTOR_VADDR
+#define INTLEVEL6_VECTOR_VADDR		XCHAL_INTLEVEL6_VECTOR_VADDR
+#define INTLEVEL7_VECTOR_VADDR		XCHAL_INTLEVEL6_VECTOR_VADDR
+#define DEBUG_VECTOR_VADDR		XCHAL_DEBUG_VECTOR_VADDR
+
+#endif
+
+#endif /* _XTENSA_VECTORS_H */
diff --git a/arch/xtensa/include/asm/vermagic.h b/arch/xtensa/include/asm/vermagic.h
new file mode 100644
index 000000000..6d9c670e4
--- /dev/null
+++ b/arch/xtensa/include/asm/vermagic.h
@@ -0,0 +1,17 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _ASM_VERMAGIC_H
+#define _ASM_VERMAGIC_H
+
+#include <linux/stringify.h>
+#include <variant/core.h>
+
+#define MODULE_ARCH_VERMAGIC "xtensa-" __stringify(XCHAL_CORE_ID) " "
+
+#endif	/* _ASM_VERMAGIC_H */
diff --git a/arch/xtensa/include/asm/vmalloc.h b/arch/xtensa/include/asm/vmalloc.h
new file mode 100644
index 000000000..0eb94b70b
--- /dev/null
+++ b/arch/xtensa/include/asm/vmalloc.h
@@ -0,0 +1,4 @@
+#ifndef _ASM_XTENSA_VMALLOC_H
+#define _ASM_XTENSA_VMALLOC_H
+
+#endif /* _ASM_XTENSA_VMALLOC_H */
diff --git a/arch/xtensa/include/uapi/asm/Kbuild b/arch/xtensa/include/uapi/asm/Kbuild
new file mode 100644
index 000000000..b97c552db
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/Kbuild
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+generated-y += unistd_32.h
diff --git a/arch/xtensa/include/uapi/asm/auxvec.h b/arch/xtensa/include/uapi/asm/auxvec.h
new file mode 100644
index 000000000..257dec75c
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/auxvec.h
@@ -0,0 +1,4 @@
+#ifndef __XTENSA_AUXVEC_H
+#define __XTENSA_AUXVEC_H
+
+#endif
diff --git a/arch/xtensa/include/uapi/asm/byteorder.h b/arch/xtensa/include/uapi/asm/byteorder.h
new file mode 100644
index 000000000..5b9f832c2
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/byteorder.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _XTENSA_BYTEORDER_H
+#define _XTENSA_BYTEORDER_H
+
+#ifdef __XTENSA_EL__
+#include <linux/byteorder/little_endian.h>
+#elif defined(__XTENSA_EB__)
+#include <linux/byteorder/big_endian.h>
+#else
+# error processor byte order undefined!
+#endif
+
+#endif /* _XTENSA_BYTEORDER_H */
diff --git a/arch/xtensa/include/uapi/asm/ioctls.h b/arch/xtensa/include/uapi/asm/ioctls.h
new file mode 100644
index 000000000..6d4a87296
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/ioctls.h
@@ -0,0 +1,130 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/ioctls.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2003 - 2005 Tensilica Inc.
+ *
+ * Derived from "include/asm-i386/ioctls.h"
+ */
+
+#ifndef _XTENSA_IOCTLS_H
+#define _XTENSA_IOCTLS_H
+
+#include <asm/ioctl.h>
+
+#define FIOCLEX		_IO('f', 1)
+#define FIONCLEX	_IO('f', 2)
+#define FIOASYNC	_IOW('f', 125, int)
+#define FIONBIO		_IOW('f', 126, int)
+#define FIONREAD	_IOR('f', 127, int)
+#define TIOCINQ		FIONREAD
+#define FIOQSIZE	_IOR('f', 128, loff_t)
+
+#define TCGETS		0x5401
+#define TCSETS		0x5402
+#define TCSETSW		0x5403
+#define TCSETSF		0x5404
+
+#define TCGETA		0x80127417	/* _IOR('t', 23, struct termio) */
+#define TCSETA		0x40127418	/* _IOW('t', 24, struct termio) */
+#define TCSETAW		0x40127419	/* _IOW('t', 25, struct termio) */
+#define TCSETAF		0x4012741C	/* _IOW('t', 28, struct termio) */
+
+#define TCSBRK		_IO('t', 29)
+#define TCXONC		_IO('t', 30)
+#define TCFLSH		_IO('t', 31)
+
+#define TIOCSWINSZ	0x40087467	/* _IOW('t', 103, struct winsize) */
+#define TIOCGWINSZ	0x80087468	/* _IOR('t', 104, struct winsize) */
+#define	TIOCSTART	_IO('t', 110)		/* start output, like ^Q */
+#define	TIOCSTOP	_IO('t', 111)		/* stop output, like ^S */
+#define TIOCOUTQ        _IOR('t', 115, int)     /* output queue size */
+
+#define TIOCSPGRP	_IOW('t', 118, int)
+#define TIOCGPGRP	_IOR('t', 119, int)
+
+#define TIOCEXCL	_IO('T', 12)
+#define TIOCNXCL	_IO('T', 13)
+#define TIOCSCTTY	_IO('T', 14)
+
+#define TIOCSTI		_IOW('T', 18, char)
+#define TIOCMGET	_IOR('T', 21, unsigned int)
+#define TIOCMBIS	_IOW('T', 22, unsigned int)
+#define TIOCMBIC	_IOW('T', 23, unsigned int)
+#define TIOCMSET	_IOW('T', 24, unsigned int)
+# define TIOCM_LE	0x001
+# define TIOCM_DTR	0x002
+# define TIOCM_RTS	0x004
+# define TIOCM_ST	0x008
+# define TIOCM_SR	0x010
+# define TIOCM_CTS	0x020
+# define TIOCM_CAR	0x040
+# define TIOCM_RNG	0x080
+# define TIOCM_DSR	0x100
+# define TIOCM_CD	TIOCM_CAR
+# define TIOCM_RI	TIOCM_RNG
+
+#define TIOCGSOFTCAR	_IOR('T', 25, unsigned int)
+#define TIOCSSOFTCAR	_IOW('T', 26, unsigned int)
+#define TIOCLINUX	_IOW('T', 28, char)
+#define TIOCCONS	_IO('T', 29)
+#define TIOCGSERIAL	0x803C541E	/*_IOR('T', 30, struct serial_struct)*/
+#define TIOCSSERIAL	0x403C541F	/*_IOW('T', 31, struct serial_struct)*/
+#define TIOCPKT		_IOW('T', 32, int)
+# define TIOCPKT_DATA		 0
+# define TIOCPKT_FLUSHREAD	 1
+# define TIOCPKT_FLUSHWRITE	 2
+# define TIOCPKT_STOP		 4
+# define TIOCPKT_START		 8
+# define TIOCPKT_NOSTOP		16
+# define TIOCPKT_DOSTOP		32
+# define TIOCPKT_IOCTL		64
+
+
+#define TIOCNOTTY	_IO('T', 34)
+#define TIOCSETD	_IOW('T', 35, int)
+#define TIOCGETD	_IOR('T', 36, int)
+#define TCSBRKP		_IOW('T', 37, int)   /* Needed for POSIX tcsendbreak()*/
+#define TIOCSBRK	_IO('T', 39) 	     /* BSD compatibility */
+#define TIOCCBRK	_IO('T', 40)	     /* BSD compatibility */
+#define TIOCGSID	_IOR('T', 41, pid_t) /* Return the session ID of FD*/
+#define TCGETS2		_IOR('T', 42, struct termios2)
+#define TCSETS2		_IOW('T', 43, struct termios2)
+#define TCSETSW2	_IOW('T', 44, struct termios2)
+#define TCSETSF2	_IOW('T', 45, struct termios2)
+#define TIOCGRS485	_IOR('T', 46, struct serial_rs485)
+#define TIOCSRS485	_IOWR('T', 47, struct serial_rs485)
+#define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
+#define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TIOCGDEV	_IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
+#define TIOCSIG		_IOW('T',0x36, int)  /* Generate signal on Pty slave */
+#define TIOCVHANGUP	_IO('T', 0x37)
+#define TIOCGPKT	_IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK	_IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL	_IOR('T', 0x40, int) /* Get exclusive mode state */
+#define TIOCGPTPEER	_IO('T', 0x41) /* Safely open the slave */
+#define TIOCGISO7816	_IOR('T', 0x42, struct serial_iso7816)
+#define TIOCSISO7816	_IOWR('T', 0x43, struct serial_iso7816)
+
+#define TIOCSERCONFIG	_IO('T', 83)
+#define TIOCSERGWILD	_IOR('T', 84,  int)
+#define TIOCSERSWILD	_IOW('T', 85,  int)
+#define TIOCGLCKTRMIOS	0x5456
+#define TIOCSLCKTRMIOS	0x5457
+#define TIOCSERGSTRUCT	0x5458		     /* For debugging only */
+#define TIOCSERGETLSR   _IOR('T', 89, unsigned int) /* Get line status reg. */
+  /* ioctl (fd, TIOCSERGETLSR, &result) where result may be as below */
+# define TIOCSER_TEMT    0x01		     /* Transmitter physically empty */
+#define TIOCSERGETMULTI 0x80a8545a /* Get multiport config  */
+			/* _IOR('T', 90, struct serial_multiport_struct) */
+#define TIOCSERSETMULTI 0x40a8545b /* Set multiport config */
+			/* _IOW('T', 91, struct serial_multiport_struct) */
+
+#define TIOCMIWAIT	_IO('T', 92) /* wait for a change on serial input line(s) */
+#define TIOCGICOUNT	0x545D	/* read serial port inline interrupt counts */
+
+#endif /* _XTENSA_IOCTLS_H */
diff --git a/arch/xtensa/include/uapi/asm/ipcbuf.h b/arch/xtensa/include/uapi/asm/ipcbuf.h
new file mode 100644
index 000000000..3bd0642f6
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/ipcbuf.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/ipcbuf.h
+ *
+ * The ipc64_perm structure for the Xtensa architecture.
+ * Note extra padding because this structure is passed back and forth
+ * between kernel and user space.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_IPCBUF_H
+#define _XTENSA_IPCBUF_H
+
+#include <linux/posix_types.h>
+
+/*
+ * Pad space is left for:
+ * - 32-bit mode_t and seq
+ * - 2 miscellaneous 32-bit values
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ */
+
+struct ipc64_perm
+{
+	__kernel_key_t		key;
+	__kernel_uid32_t	uid;
+	__kernel_gid32_t	gid;
+	__kernel_uid32_t	cuid;
+	__kernel_gid32_t	cgid;
+	__kernel_mode_t		mode;
+	unsigned long		seq;
+	unsigned long		__unused1;
+	unsigned long		__unused2;
+};
+
+#endif /* _XTENSA_IPCBUF_H */
diff --git a/arch/xtensa/include/uapi/asm/mman.h b/arch/xtensa/include/uapi/asm/mman.h
new file mode 100644
index 000000000..1ff0c8585
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/mman.h
@@ -0,0 +1,124 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/mman.h
+ *
+ * Xtensa Processor memory-manager definitions
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1995 by Ralf Baechle
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_MMAN_H
+#define _XTENSA_MMAN_H
+
+/*
+ * Protections are chosen from these bits, OR'd together.  The
+ * implementation does not necessarily support PROT_EXEC or PROT_WRITE
+ * without PROT_READ.  The only guarantees are that no writing will be
+ * allowed without PROT_WRITE and no access will be allowed for PROT_NONE.
+ */
+
+#define PROT_NONE	0x0		/* page can not be accessed */
+#define PROT_READ	0x1		/* page can be read */
+#define PROT_WRITE	0x2		/* page can be written */
+#define PROT_EXEC	0x4		/* page can be executed */
+
+#define PROT_SEM	0x10		/* page may be used for atomic ops */
+#define PROT_GROWSDOWN	0x01000000	/* mprotect flag: extend change to start of growsdown vma */
+#define PROT_GROWSUP	0x02000000	/* mprotect flag: extend change to end fo growsup vma */
+
+/*
+ * Flags for mmap
+ */
+/* 0x01 - 0x03 are defined in linux/mman.h */
+#define MAP_TYPE	0x00f		/* Mask for type of mapping */
+#define MAP_FIXED	0x010		/* Interpret addr exactly */
+
+/* not used by linux, but here to make sure we don't clash with ABI defines */
+#define MAP_RENAME	0x020		/* Assign page to file */
+#define MAP_AUTOGROW	0x040		/* File may grow by writing */
+#define MAP_LOCAL	0x080		/* Copy on fork/sproc */
+#define MAP_AUTORSRV	0x100		/* Logical swap reserved on demand */
+
+/* These are linux-specific */
+#define MAP_NORESERVE	0x0400		/* don't check for reservations */
+#define MAP_ANONYMOUS	0x0800		/* don't use a file */
+#define MAP_GROWSDOWN	0x1000		/* stack-like segment */
+#define MAP_DENYWRITE	0x2000		/* ETXTBSY */
+#define MAP_EXECUTABLE	0x4000		/* mark it as an executable */
+#define MAP_LOCKED	0x8000		/* pages are locked */
+#define MAP_POPULATE	0x10000		/* populate (prefault) pagetables */
+#define MAP_NONBLOCK	0x20000		/* do not block on IO */
+#define MAP_STACK	0x40000		/* give out an address that is best suited for process/thread stacks */
+#define MAP_HUGETLB	0x80000		/* create a huge page mapping */
+#define MAP_FIXED_NOREPLACE 0x100000	/* MAP_FIXED which doesn't unmap underlying mapping */
+#define MAP_UNINITIALIZED 0x4000000	/* For anonymous mmap, memory could be
+					 * uninitialized */
+
+/*
+ * Flags for msync
+ */
+#define MS_ASYNC	0x0001		/* sync memory asynchronously */
+#define MS_INVALIDATE	0x0002		/* invalidate mappings & caches */
+#define MS_SYNC		0x0004		/* synchronous memory sync */
+
+/*
+ * Flags for mlockall
+ */
+#define MCL_CURRENT	1		/* lock all current mappings */
+#define MCL_FUTURE	2		/* lock all future mappings */
+#define MCL_ONFAULT	4		/* lock all pages that are faulted in */
+
+/*
+ * Flags for mlock
+ */
+#define MLOCK_ONFAULT	0x01		/* Lock pages in range after they are faulted in, do not prefault */
+
+#define MADV_NORMAL	0		/* no further special treatment */
+#define MADV_RANDOM	1		/* expect random page references */
+#define MADV_SEQUENTIAL	2		/* expect sequential page references */
+#define MADV_WILLNEED	3		/* will need these pages */
+#define MADV_DONTNEED	4		/* don't need these pages */
+
+/* common parameters: try to keep these consistent across architectures */
+#define MADV_FREE	8		/* free pages only if memory pressure */
+#define MADV_REMOVE	9		/* remove these pages & resources */
+#define MADV_DONTFORK	10		/* don't inherit across fork */
+#define MADV_DOFORK	11		/* do inherit across fork */
+
+#define MADV_MERGEABLE   12		/* KSM may merge identical pages */
+#define MADV_UNMERGEABLE 13		/* KSM may not merge identical pages */
+
+#define MADV_HUGEPAGE	14		/* Worth backing with hugepages */
+#define MADV_NOHUGEPAGE	15		/* Not worth backing with hugepages */
+
+#define MADV_DONTDUMP   16		/* Explicity exclude from the core dump,
+					   overrides the coredump filter bits */
+#define MADV_DODUMP	17		/* Clear the MADV_NODUMP flag */
+
+#define MADV_WIPEONFORK 18		/* Zero memory on fork, child only */
+#define MADV_KEEPONFORK 19		/* Undo MADV_WIPEONFORK */
+
+#define MADV_COLD	20		/* deactivate these pages */
+#define MADV_PAGEOUT	21		/* reclaim these pages */
+
+#define MADV_POPULATE_READ	22	/* populate (prefault) page tables readable */
+#define MADV_POPULATE_WRITE	23	/* populate (prefault) page tables writable */
+
+#define MADV_DONTNEED_LOCKED	24	/* like DONTNEED, but drop locked pages too */
+
+#define MADV_COLLAPSE	25		/* Synchronous hugepage collapse */
+
+/* compatibility flags */
+#define MAP_FILE	0
+
+#define PKEY_DISABLE_ACCESS	0x1
+#define PKEY_DISABLE_WRITE	0x2
+#define PKEY_ACCESS_MASK	(PKEY_DISABLE_ACCESS |\
+				 PKEY_DISABLE_WRITE)
+
+#endif /* _XTENSA_MMAN_H */
diff --git a/arch/xtensa/include/uapi/asm/msgbuf.h b/arch/xtensa/include/uapi/asm/msgbuf.h
new file mode 100644
index 000000000..1ed2c85b6
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/msgbuf.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/msgbuf.h
+ *
+ * The msqid64_ds structure for the Xtensa architecture.
+ * Note extra padding because this structure is passed back and forth
+ * between kernel and user space.
+ *
+ * Pad space is left for:
+ * - 2 miscellaneous 32-bit values
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ */
+
+#ifndef _XTENSA_MSGBUF_H
+#define _XTENSA_MSGBUF_H
+
+#include <asm/ipcbuf.h>
+
+struct msqid64_ds {
+	struct ipc64_perm msg_perm;
+#ifdef __XTENSA_EB__
+	unsigned long  msg_stime_high;
+	unsigned long  msg_stime;	/* last msgsnd time */
+	unsigned long  msg_rtime_high;
+	unsigned long  msg_rtime;	/* last msgrcv time */
+	unsigned long  msg_ctime_high;
+	unsigned long  msg_ctime;	/* last change time */
+#elif defined(__XTENSA_EL__)
+	unsigned long  msg_stime;	/* last msgsnd time */
+	unsigned long  msg_stime_high;
+	unsigned long  msg_rtime;	/* last msgrcv time */
+	unsigned long  msg_rtime_high;
+	unsigned long  msg_ctime;	/* last change time */
+	unsigned long  msg_ctime_high;
+#else
+# error processor byte order undefined!
+#endif
+	unsigned long  msg_cbytes;	/* current number of bytes on queue */
+	unsigned long  msg_qnum;	/* number of messages in queue */
+	unsigned long  msg_qbytes;	/* max number of bytes on queue */
+	__kernel_pid_t msg_lspid;	/* pid of last msgsnd */
+	__kernel_pid_t msg_lrpid;	/* last receive pid */
+	unsigned long  __unused4;
+	unsigned long  __unused5;
+};
+
+#endif	/* _XTENSA_MSGBUF_H */
diff --git a/arch/xtensa/include/uapi/asm/param.h b/arch/xtensa/include/uapi/asm/param.h
new file mode 100644
index 000000000..e6feb4ee0
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/param.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/param.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _UAPI_XTENSA_PARAM_H
+#define _UAPI_XTENSA_PARAM_H
+
+#ifndef __KERNEL__
+# define HZ		100
+#endif
+
+#define EXEC_PAGESIZE	4096
+
+#ifndef NGROUPS
+#define NGROUPS		32
+#endif
+
+#ifndef NOGROUP
+#define NOGROUP		(-1)
+#endif
+
+#define MAXHOSTNAMELEN	64	/* max length of hostname */
+
+#endif /* _UAPI_XTENSA_PARAM_H */
diff --git a/arch/xtensa/include/uapi/asm/poll.h b/arch/xtensa/include/uapi/asm/poll.h
new file mode 100644
index 000000000..4d249040b
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/poll.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/poll.h
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_POLL_H
+#define _XTENSA_POLL_H
+
+#define POLLWRNORM	POLLOUT
+#define POLLWRBAND	0x0100
+#define POLLREMOVE	0x0800
+
+#include <asm-generic/poll.h>
+
+#endif /* _XTENSA_POLL_H */
diff --git a/arch/xtensa/include/uapi/asm/posix_types.h b/arch/xtensa/include/uapi/asm/posix_types.h
new file mode 100644
index 000000000..1dc675928
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/posix_types.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/posix_types.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Largely copied from include/asm-ppc/posix_types.h
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_POSIX_TYPES_H
+#define _XTENSA_POSIX_TYPES_H
+
+/*
+ * This file is generally used by user-level software, so you need to
+ * be a little careful about namespace pollution etc.  Also, we cannot
+ * assume GCC is being used.
+ */
+
+typedef unsigned short	__kernel_ipc_pid_t;
+#define __kernel_ipc_pid_t __kernel_ipc_pid_t
+
+typedef unsigned int	__kernel_size_t;
+typedef int		__kernel_ssize_t;
+typedef long		__kernel_ptrdiff_t;
+#define __kernel_size_t __kernel_size_t
+
+typedef unsigned short	__kernel_old_uid_t;
+typedef unsigned short	__kernel_old_gid_t;
+#define __kernel_old_uid_t __kernel_old_uid_t
+
+typedef unsigned short	__kernel_old_dev_t;
+#define __kernel_old_dev_t __kernel_old_dev_t
+
+#include <asm-generic/posix_types.h>
+
+#endif /* _XTENSA_POSIX_TYPES_H */
diff --git a/arch/xtensa/include/uapi/asm/ptrace.h b/arch/xtensa/include/uapi/asm/ptrace.h
new file mode 100644
index 000000000..9115e86eb
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/ptrace.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/ptrace.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _UAPI_XTENSA_PTRACE_H
+#define _UAPI_XTENSA_PTRACE_H
+
+#include <linux/types.h>
+
+/* Registers used by strace */
+
+#define REG_A_BASE	0x0000
+#define REG_AR_BASE	0x0100
+#define REG_PC		0x0020
+#define REG_PS		0x02e6
+#define REG_WB		0x0248
+#define REG_WS		0x0249
+#define REG_LBEG	0x0200
+#define REG_LEND	0x0201
+#define REG_LCOUNT	0x0202
+#define REG_SAR		0x0203
+
+#define SYSCALL_NR	0x00ff
+
+/* Other PTRACE_ values defined in <linux/ptrace.h> using values 0-9,16,17,24 */
+
+#define PTRACE_GETREGS		12
+#define PTRACE_SETREGS		13
+#define PTRACE_GETXTREGS	18
+#define PTRACE_SETXTREGS	19
+#define PTRACE_GETHBPREGS	20
+#define PTRACE_SETHBPREGS	21
+#define PTRACE_GETFDPIC		22
+
+#define PTRACE_GETFDPIC_EXEC	0
+#define PTRACE_GETFDPIC_INTERP	1
+
+#ifndef __ASSEMBLY__
+
+struct user_pt_regs {
+	__u32 pc;
+	__u32 ps;
+	__u32 lbeg;
+	__u32 lend;
+	__u32 lcount;
+	__u32 sar;
+	__u32 windowstart;
+	__u32 windowbase;
+	__u32 threadptr;
+	__u32 syscall;
+	__u32 reserved[6 + 48];
+	__u32 a[64];
+};
+
+#endif
+#endif /* _UAPI_XTENSA_PTRACE_H */
diff --git a/arch/xtensa/include/uapi/asm/sembuf.h b/arch/xtensa/include/uapi/asm/sembuf.h
new file mode 100644
index 000000000..3b9cdd406
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/sembuf.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/sembuf.h
+ *
+ * The semid64_ds structure for Xtensa architecture.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ *
+ * Note extra padding because this structure is passed back and forth
+ * between kernel and user space.
+ *
+ * Pad space is left for:
+ * - 2 miscellaneous 32-bit values
+ *
+ */
+
+#ifndef _XTENSA_SEMBUF_H
+#define _XTENSA_SEMBUF_H
+
+#include <asm/byteorder.h>
+#include <asm/ipcbuf.h>
+
+struct semid64_ds {
+	struct ipc64_perm sem_perm;		/* permissions .. see ipc.h */
+#ifdef __XTENSA_EL__
+	unsigned long	sem_otime;		/* last semop time */
+	unsigned long	sem_otime_high;
+	unsigned long	sem_ctime;		/* last change time */
+	unsigned long	sem_ctime_high;
+#else
+	unsigned long	sem_otime_high;
+	unsigned long	sem_otime;		/* last semop time */
+	unsigned long	sem_ctime_high;
+	unsigned long	sem_ctime;		/* last change time */
+#endif
+	unsigned long	sem_nsems;		/* no. of semaphores in array */
+	unsigned long	__unused3;
+	unsigned long	__unused4;
+};
+
+#endif /* __ASM_XTENSA_SEMBUF_H */
diff --git a/arch/xtensa/include/uapi/asm/setup.h b/arch/xtensa/include/uapi/asm/setup.h
new file mode 100644
index 000000000..5356a5fd4
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/setup.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/setup.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_SETUP_H
+#define _XTENSA_SETUP_H
+
+#define COMMAND_LINE_SIZE	256
+
+#endif
diff --git a/arch/xtensa/include/uapi/asm/shmbuf.h b/arch/xtensa/include/uapi/asm/shmbuf.h
new file mode 100644
index 000000000..bb8bdddae
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/shmbuf.h
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/shmbuf.h
+ *
+ * The shmid64_ds structure for Xtensa architecture.
+ * Note extra padding because this structure is passed back and forth
+ * between kernel and user space, but the padding is on the wrong
+ * side for big-endian xtensa, for historic reasons.
+ *
+ * Pad space is left for:
+ * - 2 miscellaneous 32-bit values
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_SHMBUF_H
+#define _XTENSA_SHMBUF_H
+
+#include <asm/ipcbuf.h>
+#include <asm/posix_types.h>
+
+struct shmid64_ds {
+	struct ipc64_perm	shm_perm;	/* operation perms */
+	__kernel_size_t		shm_segsz;	/* size of segment (bytes) */
+	unsigned long		shm_atime;	/* last attach time */
+	unsigned long		shm_atime_high;
+	unsigned long		shm_dtime;	/* last detach time */
+	unsigned long		shm_dtime_high;
+	unsigned long		shm_ctime;	/* last change time */
+	unsigned long		shm_ctime_high;
+	__kernel_pid_t		shm_cpid;	/* pid of creator */
+	__kernel_pid_t		shm_lpid;	/* pid of last operator */
+	unsigned long		shm_nattch;	/* no. of current attaches */
+	unsigned long		__unused4;
+	unsigned long		__unused5;
+};
+
+struct shminfo64 {
+	unsigned long	shmmax;
+	unsigned long	shmmin;
+	unsigned long	shmmni;
+	unsigned long	shmseg;
+	unsigned long	shmall;
+	unsigned long	__unused1;
+	unsigned long	__unused2;
+	unsigned long	__unused3;
+	unsigned long	__unused4;
+};
+
+#endif	/* _XTENSA_SHMBUF_H */
diff --git a/arch/xtensa/include/uapi/asm/sigcontext.h b/arch/xtensa/include/uapi/asm/sigcontext.h
new file mode 100644
index 000000000..9cbf39e63
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/sigcontext.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/sigcontext.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2007 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_SIGCONTEXT_H
+#define _XTENSA_SIGCONTEXT_H
+
+
+struct sigcontext {
+	unsigned long sc_pc;
+	unsigned long sc_ps;
+	unsigned long sc_lbeg;
+	unsigned long sc_lend;
+	unsigned long sc_lcount;
+	unsigned long sc_sar;
+	unsigned long sc_acclo;
+	unsigned long sc_acchi;
+	unsigned long sc_a[16];
+	void *sc_xtregs;
+};
+
+#endif /* _XTENSA_SIGCONTEXT_H */
diff --git a/arch/xtensa/include/uapi/asm/signal.h b/arch/xtensa/include/uapi/asm/signal.h
new file mode 100644
index 000000000..b8c824dd4
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/signal.h
@@ -0,0 +1,110 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/signal.h
+ *
+ * Swiped from SH.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _UAPI_XTENSA_SIGNAL_H
+#define _UAPI_XTENSA_SIGNAL_H
+
+
+#define _NSIG		64
+#define _NSIG_BPW	32
+#define _NSIG_WORDS	(_NSIG / _NSIG_BPW)
+
+#ifndef __ASSEMBLY__
+
+#include <linux/types.h>
+
+/* Avoid too many header ordering problems.  */
+struct siginfo;
+typedef unsigned long old_sigset_t;		/* at least 32 bits */
+typedef struct {
+	unsigned long sig[_NSIG_WORDS];
+} sigset_t;
+
+#endif
+
+#define SIGHUP		 1
+#define SIGINT		 2
+#define SIGQUIT		 3
+#define SIGILL		 4
+#define SIGTRAP		 5
+#define SIGABRT		 6
+#define SIGIOT		 6
+#define SIGBUS		 7
+#define SIGFPE		 8
+#define SIGKILL		 9
+#define SIGUSR1		10
+#define SIGSEGV		11
+#define SIGUSR2		12
+#define SIGPIPE		13
+#define SIGALRM		14
+#define SIGTERM		15
+#define SIGSTKFLT	16
+#define SIGCHLD		17
+#define SIGCONT		18
+#define SIGSTOP		19
+#define SIGTSTP		20
+#define SIGTTIN		21
+#define SIGTTOU		22
+#define SIGURG		23
+#define SIGXCPU		24
+#define SIGXFSZ		25
+#define SIGVTALRM	26
+#define SIGPROF		27
+#define SIGWINCH	28
+#define SIGIO		29
+#define SIGPOLL		SIGIO
+/* #define SIGLOST		29 */
+#define SIGPWR		30
+#define SIGSYS		31
+#define	SIGUNUSED	31
+
+/* These should not be considered constants from userland.  */
+#define SIGRTMIN	32
+#define SIGRTMAX	(_NSIG-1)
+
+#define SA_RESTORER	0x04000000
+
+#define MINSIGSTKSZ	2048
+#define SIGSTKSZ	8192
+
+#ifndef __ASSEMBLY__
+
+#include <asm-generic/signal-defs.h>
+
+#ifndef __KERNEL__
+
+/* Here we must cater to libcs that poke about in kernel headers.  */
+
+struct sigaction {
+	union {
+	  __sighandler_t _sa_handler;
+	  void (*_sa_sigaction)(int, struct siginfo *, void *);
+	} _u;
+	sigset_t sa_mask;
+	unsigned long sa_flags;
+	void (*sa_restorer)(void);
+};
+
+#define sa_handler	_u._sa_handler
+#define sa_sigaction	_u._sa_sigaction
+
+#endif /* __KERNEL__ */
+
+typedef struct sigaltstack {
+	void *ss_sp;
+	int ss_flags;
+	__kernel_size_t ss_size;
+} stack_t;
+
+#endif	/* __ASSEMBLY__ */
+#endif /* _UAPI_XTENSA_SIGNAL_H */
diff --git a/arch/xtensa/include/uapi/asm/sockios.h b/arch/xtensa/include/uapi/asm/sockios.h
new file mode 100644
index 000000000..1a1f58f4b
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/sockios.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/sockios.h
+ *
+ * Socket-level I/O control calls.  Copied from MIPS.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1995 by Ralf Baechle
+ * Copyright (C) 2001 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_SOCKIOS_H
+#define _XTENSA_SOCKIOS_H
+
+#include <asm/ioctl.h>
+
+/* Socket-level I/O control calls. */
+
+#define FIOGETOWN	_IOR('f', 123, int)
+#define FIOSETOWN 	_IOW('f', 124, int)
+
+#define SIOCATMARK	_IOR('s', 7, int)
+#define SIOCSPGRP	_IOW('s', 8, pid_t)
+#define SIOCGPGRP	_IOR('s', 9, pid_t)
+
+#define SIOCGSTAMP_OLD	0x8906		/* Get stamp (timeval) */
+#define SIOCGSTAMPNS_OLD 0x8907		/* Get stamp (timespec) */
+
+#endif	/* _XTENSA_SOCKIOS_H */
diff --git a/arch/xtensa/include/uapi/asm/stat.h b/arch/xtensa/include/uapi/asm/stat.h
new file mode 100644
index 000000000..7b4d90d6d
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/stat.h
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/stat.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2007 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_STAT_H
+#define _XTENSA_STAT_H
+
+#define STAT_HAVE_NSEC 1
+
+struct stat {
+	unsigned long	st_dev;
+	unsigned long	st_ino;
+	unsigned int	st_mode;
+	unsigned int	st_nlink;
+	unsigned int	st_uid;
+	unsigned int	st_gid;
+	unsigned long	st_rdev;
+	long		st_size;
+	unsigned long	st_blksize;
+	unsigned long	st_blocks;
+	unsigned long	st_atime;
+	unsigned long	st_atime_nsec;
+	unsigned long	st_mtime;
+	unsigned long	st_mtime_nsec;
+	unsigned long	st_ctime;
+	unsigned long	st_ctime_nsec;
+	unsigned long	__unused4;
+	unsigned long	__unused5;
+};
+
+struct stat64  {
+	unsigned long long st_dev;	/* Device */
+	unsigned long long st_ino;	/* File serial number */
+	unsigned int  st_mode;		/* File mode. */
+	unsigned int  st_nlink;		/* Link count. */
+	unsigned int  st_uid;		/* User ID of the file's owner. */
+	unsigned int  st_gid;		/* Group ID of the file's group. */
+	unsigned long long st_rdev;	/* Device number, if device. */
+	long long st_size;		/* Size of file, in bytes. */
+	unsigned long st_blksize;	/* Optimal block size for I/O. */
+	unsigned long __unused2;
+	unsigned long long st_blocks;	/* Number 512-byte blocks allocated. */
+	unsigned long st_atime;		/* Time of last access. */
+	unsigned long st_atime_nsec;
+	unsigned long st_mtime;		/* Time of last modification. */
+	unsigned long st_mtime_nsec;
+	unsigned long st_ctime;		/* Time of last status change. */
+	unsigned long st_ctime_nsec;
+	unsigned long __unused4;
+	unsigned long __unused5;
+};
+
+#endif	/* _XTENSA_STAT_H */
diff --git a/arch/xtensa/include/uapi/asm/swab.h b/arch/xtensa/include/uapi/asm/swab.h
new file mode 100644
index 000000000..e677cf4cc
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/swab.h
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/swab.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_SWAB_H
+#define _XTENSA_SWAB_H
+
+#include <linux/types.h>
+#include <linux/compiler.h>
+
+#define __SWAB_64_THRU_32__
+
+static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
+{
+    __u32 res;
+    /* instruction sequence from Xtensa ISA release 2/2000 */
+    __asm__("ssai     8           \n\t"
+	    "srli     %0, %1, 16  \n\t"
+	    "src      %0, %0, %1  \n\t"
+	    "src      %0, %0, %0  \n\t"
+	    "src      %0, %1, %0  \n"
+	    : "=&a" (res)
+	    : "a" (x)
+	    );
+    return res;
+}
+#define __arch_swab32 __arch_swab32
+
+static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
+{
+    /* Given that 'short' values are signed (i.e., can be negative),
+     * we cannot assume that the upper 16-bits of the register are
+     * zero.  We are careful to mask values after shifting.
+     */
+
+    /* There exists an anomaly between xt-gcc and xt-xcc.  xt-gcc
+     * inserts an extui instruction after putting this function inline
+     * to ensure that it uses only the least-significant 16 bits of
+     * the result.  xt-xcc doesn't use an extui, but assumes the
+     * __asm__ macro follows convention that the upper 16 bits of an
+     * 'unsigned short' result are still zero.  This macro doesn't
+     * follow convention; indeed, it leaves garbage in the upport 16
+     * bits of the register.
+
+     * Declaring the temporary variables 'res' and 'tmp' to be 32-bit
+     * types while the return type of the function is a 16-bit type
+     * forces both compilers to insert exactly one extui instruction
+     * (or equivalent) to mask off the upper 16 bits. */
+
+    __u32 res;
+    __u32 tmp;
+
+    __asm__("extui    %1, %2, 8, 8\n\t"
+	    "slli     %0, %2, 8   \n\t"
+	    "or       %0, %0, %1  \n"
+	    : "=&a" (res), "=&a" (tmp)
+	    : "a" (x)
+	    );
+
+    return res;
+}
+#define __arch_swab16 __arch_swab16
+
+#endif /* _XTENSA_SWAB_H */
diff --git a/arch/xtensa/include/uapi/asm/types.h b/arch/xtensa/include/uapi/asm/types.h
new file mode 100644
index 000000000..12db8ac38
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/types.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * include/asm-xtensa/types.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _UAPI_XTENSA_TYPES_H
+#define _UAPI_XTENSA_TYPES_H
+
+#include <asm-generic/int-ll64.h>
+
+#ifdef __ASSEMBLY__
+# define __XTENSA_UL(x)		(x)
+# define __XTENSA_UL_CONST(x)	x
+#else
+# define __XTENSA_UL(x)		((unsigned long)(x))
+# define ___XTENSA_UL_CONST(x)	x##UL
+# define __XTENSA_UL_CONST(x)	___XTENSA_UL_CONST(x)
+#endif
+
+#ifndef __ASSEMBLY__
+
+#endif
+
+#endif /* _UAPI_XTENSA_TYPES_H */
diff --git a/arch/xtensa/include/uapi/asm/unistd.h b/arch/xtensa/include/uapi/asm/unistd.h
new file mode 100644
index 000000000..e67ccdd11
--- /dev/null
+++ b/arch/xtensa/include/uapi/asm/unistd.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_XTENSA_UNISTD_H
+#define _UAPI_XTENSA_UNISTD_H
+
+#include <asm/unistd_32.h>
+
+#define __ARCH_WANT_SYS_OLDUMOUNT
+
+/*
+ * sysxtensa syscall handler
+ *
+ * int sysxtensa (SYS_XTENSA_ATOMIC_SET,     ptr, val,    unused);
+ * int sysxtensa (SYS_XTENSA_ATOMIC_ADD,     ptr, val,    unused);
+ * int sysxtensa (SYS_XTENSA_ATOMIC_EXG_ADD, ptr, val,    unused);
+ * int sysxtensa (SYS_XTENSA_ATOMIC_CMP_SWP, ptr, oldval, newval);
+ *        a2            a6                   a3    a4      a5
+ */
+
+#define SYS_XTENSA_RESERVED               0     /* don't use this */
+#define SYS_XTENSA_ATOMIC_SET             1     /* set variable */
+#define SYS_XTENSA_ATOMIC_EXG_ADD         2     /* exchange memory and add */
+#define SYS_XTENSA_ATOMIC_ADD             3     /* add to memory */
+#define SYS_XTENSA_ATOMIC_CMP_SWP         4     /* compare and swap */
+#define SYS_XTENSA_COUNT                  5     /* count */
+
+#endif /* _UAPI_XTENSA_UNISTD_H */
diff --git a/arch/xtensa/kernel/.gitignore b/arch/xtensa/kernel/.gitignore
new file mode 100644
index 000000000..bbb90f92d
--- /dev/null
+++ b/arch/xtensa/kernel/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+vmlinux.lds
diff --git a/arch/xtensa/kernel/Makefile b/arch/xtensa/kernel/Makefile
new file mode 100644
index 000000000..f28b8e3d7
--- /dev/null
+++ b/arch/xtensa/kernel/Makefile
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Linux/Xtensa kernel.
+#
+
+extra-y := vmlinux.lds
+
+obj-y := head.o align.o coprocessor.o entry.o irq.o platform.o process.o \
+	 ptrace.o setup.o signal.o stacktrace.o syscall.o time.o traps.o \
+	 vectors.o
+
+obj-$(CONFIG_MMU) += pci-dma.o
+obj-$(CONFIG_PCI) += pci.o
+obj-$(CONFIG_MODULES) += xtensa_ksyms.o module.o
+obj-$(CONFIG_FUNCTION_TRACER) += mcount.o
+obj-$(CONFIG_SMP) += smp.o
+obj-$(CONFIG_SECONDARY_RESET_VECTOR) += mxhead.o
+obj-$(CONFIG_XTENSA_VARIANT_HAVE_PERF_EVENTS) += perf_event.o
+obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
+obj-$(CONFIG_S32C1I_SELFTEST) += s32c1i_selftest.o
+obj-$(CONFIG_JUMP_LABEL) += jump_label.o
+obj-$(CONFIG_HIBERNATION) += hibernate.o
+
+# In the Xtensa architecture, assembly generates literals which must always
+# precede the L32R instruction with a relative offset less than 256 kB.
+# Therefore, the .text and .literal section must be combined in parenthesis
+# in the linker script, such as: *(.literal .text).
+#
+# We need to post-process the generated vmlinux.lds scripts to convert
+# *(xxx.text) to  *(xxx.literal xxx.text) for the following text sections:
+#   .text .ref.text .*init.text .*exit.text .text.*
+#
+# Replicate rules in scripts/Makefile.build
+
+sed-y = -e ':a; s/\*(\([^)]*\)\.text\.unlikely/*(\1.literal.unlikely .{text}.unlikely/; ta; ' \
+	-e ':b; s/\*(\([^)]*\)\.text\(\.[a-z]*\)/*(\1.{text}\2.literal .{text}\2/; tb; ' \
+	-e ':c; s/\*(\([^)]*\)\(\.[a-z]*it\|\.ref\)\.text/*(\1\2.literal \2.{text}/; tc; ' \
+	-e ':d; s/\*(\([^)]\+ \|\)\.text/*(\1.literal .{text}/; td; ' \
+	-e 's/\.{text}/.text/g'
+
+quiet_cmd__cpp_lds_S = LDS     $@
+cmd__cpp_lds_S = $(CPP) $(cpp_flags) -P -C -Uxtensa -D__ASSEMBLY__ \
+		 -DLINKER_SCRIPT $< | sed $(sed-y) >$@
+
+$(obj)/vmlinux.lds: $(src)/vmlinux.lds.S FORCE
+	$(call if_changed_dep,_cpp_lds_S)
diff --git a/arch/xtensa/kernel/align.S b/arch/xtensa/kernel/align.S
new file mode 100644
index 000000000..d062c732e
--- /dev/null
+++ b/arch/xtensa/kernel/align.S
@@ -0,0 +1,487 @@
+/*
+ * arch/xtensa/kernel/align.S
+ *
+ * Handle unalignment exceptions in kernel space.
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica, Inc.
+ * Copyright (C) 2014 Cadence Design Systems Inc.
+ *
+ * Rewritten by Chris Zankel <chris@zankel.net>
+ *
+ * Based on work from Joe Taylor <joe@tensilica.com, joetylr@yahoo.com>
+ * and Marc Gauthier <marc@tensilica.com, marc@alimni.uwaterloo.ca>
+ */
+
+#include <linux/linkage.h>
+#include <asm/current.h>
+#include <asm/asm-offsets.h>
+#include <asm/asmmacro.h>
+#include <asm/processor.h>
+
+#if XCHAL_UNALIGNED_LOAD_EXCEPTION || XCHAL_UNALIGNED_STORE_EXCEPTION
+
+/*  First-level exception handler for unaligned exceptions.
+ *
+ *  Note: This handler works only for kernel exceptions.  Unaligned user
+ *        access should get a seg fault.
+ */
+
+/* Big and little endian 16-bit values are located in
+ * different halves of a register.  HWORD_START helps to
+ * abstract the notion of extracting a 16-bit value from a
+ * register.
+ * We also have to define new shifting instructions because
+ * lsb and msb are on 'opposite' ends in a register for
+ * different endian machines.
+ *
+ * Assume a memory region in ascending address:
+ *   	0 1 2 3|4 5 6 7
+ *
+ * When loading one word into a register, the content of that register is:
+ *  LE	3 2 1 0, 7 6 5 4
+ *  BE  0 1 2 3, 4 5 6 7
+ *
+ * Masking the bits of the higher/lower address means:
+ *  LE  X X 0 0, 0 0 X X
+ *  BE	0 0 X X, X X 0 0
+ *
+ * Shifting to higher/lower addresses, means:
+ *  LE  shift left / shift right
+ *  BE  shift right / shift left
+ *
+ * Extracting 16 bits from a 32 bit reg. value to higher/lower address means:
+ *  LE  mask 0 0 X X / shift left
+ *  BE  shift left / mask 0 0 X X
+ */
+
+#if XCHAL_HAVE_WINDOWED
+#define UNALIGNED_USER_EXCEPTION
+#endif
+
+#if XCHAL_HAVE_BE
+
+#define HWORD_START	16
+#define	INSN_OP0	28
+#define	INSN_T		24
+#define	INSN_OP1	16
+
+.macro __ssa8r	r;		ssa8l	\r;		.endm
+.macro __sh	r, s;		srl	\r, \s;		.endm
+.macro __sl	r, s;		sll	\r, \s;		.endm
+.macro __exth	r, s;		extui	\r, \s, 0, 16;	.endm
+.macro __extl	r, s;		slli	\r, \s, 16;	.endm
+
+#else
+
+#define HWORD_START	0
+#define	INSN_OP0	0
+#define	INSN_T		4
+#define	INSN_OP1	12
+
+.macro __ssa8r	r;		ssa8b	\r;		.endm
+.macro __sh	r, s;		sll	\r, \s;		.endm
+.macro __sl	r, s;		srl	\r, \s;		.endm
+.macro __exth	r, s;		slli	\r, \s, 16;	.endm
+.macro __extl	r, s;		extui	\r, \s, 0, 16;	.endm
+
+#endif
+
+/*
+ *	xxxx xxxx = imm8 field
+ *	     yyyy = imm4 field
+ *	     ssss = s field
+ *	     tttt = t field
+ *
+ *	       		 16		    0
+ *		          -------------------
+ *	L32I.N		  yyyy ssss tttt 1000
+ *	S32I.N	          yyyy ssss tttt 1001
+ *
+ *	       23			    0
+ *		-----------------------------
+ *	res	          0000           0010
+ *	L16UI	xxxx xxxx 0001 ssss tttt 0010
+ *	L32I	xxxx xxxx 0010 ssss tttt 0010
+ *	XXX	          0011 ssss tttt 0010
+ *	XXX	          0100 ssss tttt 0010
+ *	S16I	xxxx xxxx 0101 ssss tttt 0010
+ *	S32I	xxxx xxxx 0110 ssss tttt 0010
+ *	XXX	          0111 ssss tttt 0010
+ *	XXX	          1000 ssss tttt 0010
+ *	L16SI	xxxx xxxx 1001 ssss tttt 0010
+ *	XXX	          1010           0010
+ *      **L32AI	xxxx xxxx 1011 ssss tttt 0010 unsupported
+ *	XXX	          1100           0010
+ *	XXX	          1101           0010
+ *	XXX	          1110           0010
+ *	**S32RI	xxxx xxxx 1111 ssss tttt 0010 unsupported
+ *		-----------------------------
+ *                           ^         ^    ^
+ *    sub-opcode (NIBBLE_R) -+         |    |
+ *       t field (NIBBLE_T) -----------+    |
+ *  major opcode (NIBBLE_OP0) --------------+
+ */
+
+#define OP0_L32I_N	0x8		/* load immediate narrow */
+#define OP0_S32I_N	0x9		/* store immediate narrow */
+#define OP1_SI_MASK	0x4		/* OP1 bit set for stores */
+#define OP1_SI_BIT	2		/* OP1 bit number for stores */
+
+#define OP1_L32I	0x2
+#define OP1_L16UI	0x1
+#define OP1_L16SI	0x9
+#define OP1_L32AI	0xb
+
+#define OP1_S32I	0x6
+#define OP1_S16I	0x5
+#define OP1_S32RI	0xf
+
+/*
+ * Entry condition:
+ *
+ *   a0:	trashed, original value saved on stack (PT_AREG0)
+ *   a1:	a1
+ *   a2:	new stack pointer, original in DEPC
+ *   a3:	a3
+ *   depc:	a2, original value saved on stack (PT_DEPC)
+ *   excsave_1:	dispatch table
+ *
+ *   PT_DEPC >= VALID_DOUBLE_EXCEPTION_ADDRESS: double exception, DEPC
+ *	     <  VALID_DOUBLE_EXCEPTION_ADDRESS: regular exception
+ */
+
+	.literal_position
+ENTRY(fast_unaligned)
+
+	/* Note: We don't expect the address to be aligned on a word
+	 *       boundary. After all, the processor generated that exception
+	 *       and it would be a hardware fault.
+	 */
+
+	/* Save some working register */
+
+	s32i	a4, a2, PT_AREG4
+	s32i	a5, a2, PT_AREG5
+	s32i	a6, a2, PT_AREG6
+	s32i	a7, a2, PT_AREG7
+	s32i	a8, a2, PT_AREG8
+
+	rsr	a0, depc
+	s32i	a0, a2, PT_AREG2
+	s32i	a3, a2, PT_AREG3
+
+	rsr	a3, excsave1
+	movi	a4, fast_unaligned_fixup
+	s32i	a4, a3, EXC_TABLE_FIXUP
+
+	/* Keep value of SAR in a0 */
+
+	rsr	a0, sar
+	rsr	a8, excvaddr		# load unaligned memory address
+
+	/* Now, identify one of the following load/store instructions.
+	 *
+	 * The only possible danger of a double exception on the
+	 * following l32i instructions is kernel code in vmalloc
+	 * memory. The processor was just executing at the EPC_1
+	 * address, and indeed, already fetched the instruction.  That
+	 * guarantees a TLB mapping, which hasn't been replaced by
+	 * this unaligned exception handler that uses only static TLB
+	 * mappings. However, high-level interrupt handlers might
+	 * modify TLB entries, so for the generic case, we register a
+	 * TABLE_FIXUP handler here, too.
+	 */
+
+	/* a3...a6 saved on stack, a2 = SP */
+
+	/* Extract the instruction that caused the unaligned access. */
+
+	rsr	a7, epc1	# load exception address
+	movi	a3, ~3
+	and	a3, a3, a7	# mask lower bits
+
+	l32i	a4, a3, 0	# load 2 words
+	l32i	a5, a3, 4
+
+	__ssa8	a7
+	__src_b	a4, a4, a5	# a4 has the instruction
+
+	/* Analyze the instruction (load or store?). */
+
+	extui	a5, a4, INSN_OP0, 4	# get insn.op0 nibble
+
+#if XCHAL_HAVE_DENSITY
+	_beqi	a5, OP0_L32I_N, .Lload	# L32I.N, jump
+	addi	a6, a5, -OP0_S32I_N
+	_beqz	a6, .Lstore		# S32I.N, do a store
+#endif
+	/* 'store indicator bit' not set, jump */
+	_bbci.l	a4, OP1_SI_BIT + INSN_OP1, .Lload
+
+	/* Store: Jump to table entry to get the value in the source register.*/
+
+.Lstore:movi	a5, .Lstore_table	# table
+	extui	a6, a4, INSN_T, 4	# get source register
+	addx8	a5, a6, a5
+	jx	a5			# jump into table
+
+	/* Load: Load memory address. */
+
+.Lload: movi	a3, ~3
+	and	a3, a3, a8		# align memory address
+
+	__ssa8	a8
+#ifdef UNALIGNED_USER_EXCEPTION
+	addi	a3, a3, 8
+	l32e	a5, a3, -8
+	l32e	a6, a3, -4
+#else
+	l32i	a5, a3, 0
+	l32i	a6, a3, 4
+#endif
+	__src_b	a3, a5, a6		# a3 has the data word
+
+#if XCHAL_HAVE_DENSITY
+	addi	a7, a7, 2		# increment PC (assume 16-bit insn)
+
+	extui	a5, a4, INSN_OP0, 4
+	_beqi	a5, OP0_L32I_N, 1f	# l32i.n: jump
+
+	addi	a7, a7, 1
+#else
+	addi	a7, a7, 3
+#endif
+
+	extui	a5, a4, INSN_OP1, 4
+	_beqi	a5, OP1_L32I, 1f	# l32i: jump
+
+	extui	a3, a3, 0, 16		# extract lower 16 bits
+	_beqi	a5, OP1_L16UI, 1f
+	addi	a5, a5, -OP1_L16SI
+	_bnez	a5, .Linvalid_instruction_load
+
+	/* sign extend value */
+
+	slli	a3, a3, 16
+	srai	a3, a3, 16
+
+	/* Set target register. */
+
+1:
+	extui	a4, a4, INSN_T, 4	# extract target register
+	movi	a5, .Lload_table
+	addx8	a4, a4, a5
+	jx	a4			# jump to entry for target register
+
+	.align	8
+.Lload_table:
+	s32i	a3, a2, PT_AREG0;	_j .Lexit;	.align 8
+	mov	a1, a3;			_j .Lexit;	.align 8 # fishy??
+	s32i	a3, a2, PT_AREG2;	_j .Lexit;	.align 8
+	s32i	a3, a2, PT_AREG3;	_j .Lexit;	.align 8
+	s32i	a3, a2, PT_AREG4;	_j .Lexit;	.align 8
+	s32i	a3, a2, PT_AREG5;	_j .Lexit;	.align 8
+	s32i	a3, a2, PT_AREG6;	_j .Lexit;	.align 8
+	s32i	a3, a2, PT_AREG7;	_j .Lexit;	.align 8
+	s32i	a3, a2, PT_AREG8;	_j .Lexit;	.align 8
+	mov	a9, a3		;	_j .Lexit;	.align 8
+	mov	a10, a3		;	_j .Lexit;	.align 8
+	mov	a11, a3		;	_j .Lexit;	.align 8
+	mov	a12, a3		;	_j .Lexit;	.align 8
+	mov	a13, a3		;	_j .Lexit;	.align 8
+	mov	a14, a3		;	_j .Lexit;	.align 8
+	mov	a15, a3		;	_j .Lexit;	.align 8
+
+.Lstore_table:
+	l32i	a3, a2, PT_AREG0;	_j 1f;	.align 8
+	mov	a3, a1;			_j 1f;	.align 8	# fishy??
+	l32i	a3, a2, PT_AREG2;	_j 1f;	.align 8
+	l32i	a3, a2, PT_AREG3;	_j 1f;	.align 8
+	l32i	a3, a2, PT_AREG4;	_j 1f;	.align 8
+	l32i	a3, a2, PT_AREG5;	_j 1f;	.align 8
+	l32i	a3, a2, PT_AREG6;	_j 1f;	.align 8
+	l32i	a3, a2, PT_AREG7;	_j 1f;	.align 8
+	l32i	a3, a2, PT_AREG8;	_j 1f;	.align 8
+	mov	a3, a9		;	_j 1f;	.align 8
+	mov	a3, a10		;	_j 1f;	.align 8
+	mov	a3, a11		;	_j 1f;	.align 8
+	mov	a3, a12		;	_j 1f;	.align 8
+	mov	a3, a13		;	_j 1f;	.align 8
+	mov	a3, a14		;	_j 1f;	.align 8
+	mov	a3, a15		;	_j 1f;	.align 8
+
+	/* We cannot handle this exception. */
+
+	.extern _kernel_exception
+.Linvalid_instruction_load:
+.Linvalid_instruction_store:
+
+	movi	a4, 0
+	rsr	a3, excsave1
+	s32i	a4, a3, EXC_TABLE_FIXUP
+
+	/* Restore a4...a8 and SAR, set SP, and jump to default exception. */
+
+	l32i	a8, a2, PT_AREG8
+	l32i	a7, a2, PT_AREG7
+	l32i	a6, a2, PT_AREG6
+	l32i	a5, a2, PT_AREG5
+	l32i	a4, a2, PT_AREG4
+	wsr	a0, sar
+	mov	a1, a2
+
+	rsr	a0, ps
+	bbsi.l  a0, PS_UM_BIT, 2f     # jump if user mode
+
+	movi	a0, _kernel_exception
+	jx	a0
+
+2:	movi	a0, _user_exception
+	jx	a0
+
+1: 	# a7: instruction pointer, a4: instruction, a3: value
+
+	movi	a6, 0			# mask: ffffffff:00000000
+
+#if XCHAL_HAVE_DENSITY
+	addi	a7, a7, 2		# incr. PC,assume 16-bit instruction
+
+	extui	a5, a4, INSN_OP0, 4	# extract OP0
+	addi	a5, a5, -OP0_S32I_N
+	_beqz	a5, 1f			# s32i.n: jump
+
+	addi	a7, a7, 1		# increment PC, 32-bit instruction
+#else
+	addi	a7, a7, 3		# increment PC, 32-bit instruction
+#endif
+
+	extui	a5, a4, INSN_OP1, 4	# extract OP1
+	_beqi	a5, OP1_S32I, 1f	# jump if 32 bit store
+	_bnei	a5, OP1_S16I, .Linvalid_instruction_store
+
+	movi	a5, -1
+	__extl	a3, a3			# get 16-bit value
+	__exth	a6, a5			# get 16-bit mask ffffffff:ffff0000
+
+	/* Get memory address */
+
+1:
+	movi	a4, ~3
+	and	a4, a4, a8		# align memory address
+
+	/* Insert value into memory */
+
+	movi	a5, -1			# mask: ffffffff:XXXX0000
+#ifdef UNALIGNED_USER_EXCEPTION
+	addi	a4, a4, 8
+#endif
+
+	__ssa8r a8
+	__src_b	a8, a5, a6		# lo-mask  F..F0..0 (BE) 0..0F..F (LE)
+	__src_b	a6, a6, a5		# hi-mask  0..0F..F (BE) F..F0..0 (LE)
+#ifdef UNALIGNED_USER_EXCEPTION
+	l32e	a5, a4, -8
+#else
+	l32i	a5, a4, 0		# load lower address word
+#endif
+	and	a5, a5, a8		# mask
+	__sh	a8, a3 			# shift value
+	or	a5, a5, a8		# or with original value
+#ifdef UNALIGNED_USER_EXCEPTION
+	s32e	a5, a4, -8
+	l32e	a8, a4, -4
+#else
+	s32i	a5, a4, 0		# store
+	l32i	a8, a4, 4		# same for upper address word
+#endif
+	__sl	a5, a3
+	and	a6, a8, a6
+	or	a6, a6, a5
+#ifdef UNALIGNED_USER_EXCEPTION
+	s32e	a6, a4, -4
+#else
+	s32i	a6, a4, 4
+#endif
+
+.Lexit:
+#if XCHAL_HAVE_LOOPS
+	rsr	a4, lend		# check if we reached LEND
+	bne	a7, a4, 1f
+	rsr	a4, lcount		# and LCOUNT != 0
+	beqz	a4, 1f
+	addi	a4, a4, -1		# decrement LCOUNT and set
+	rsr	a7, lbeg		# set PC to LBEGIN
+	wsr	a4, lcount
+#endif
+
+1:	wsr	a7, epc1		# skip emulated instruction
+
+	/* Update icount if we're single-stepping in userspace. */
+	rsr	a4, icountlevel
+	beqz	a4, 1f
+	bgeui	a4, LOCKLEVEL + 1, 1f
+	rsr	a4, icount
+	addi	a4, a4, 1
+	wsr	a4, icount
+1:
+	movi	a4, 0
+	rsr	a3, excsave1
+	s32i	a4, a3, EXC_TABLE_FIXUP
+
+	/* Restore working register */
+
+	l32i	a8, a2, PT_AREG8
+	l32i	a7, a2, PT_AREG7
+	l32i	a6, a2, PT_AREG6
+	l32i	a5, a2, PT_AREG5
+	l32i	a4, a2, PT_AREG4
+	l32i	a3, a2, PT_AREG3
+
+	/* restore SAR and return */
+
+	wsr	a0, sar
+	l32i	a0, a2, PT_AREG0
+	l32i	a2, a2, PT_AREG2
+	rfe
+
+ENDPROC(fast_unaligned)
+
+ENTRY(fast_unaligned_fixup)
+
+	l32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
+	wsr	a3, excsave1
+
+	l32i	a8, a2, PT_AREG8
+	l32i	a7, a2, PT_AREG7
+	l32i	a6, a2, PT_AREG6
+	l32i	a5, a2, PT_AREG5
+	l32i	a4, a2, PT_AREG4
+	l32i	a0, a2, PT_AREG2
+	xsr	a0, depc			# restore depc and a0
+	wsr	a0, sar
+
+	rsr	a0, exccause
+	s32i	a0, a2, PT_DEPC			# mark as a regular exception
+
+	rsr	a0, ps
+	bbsi.l  a0, PS_UM_BIT, 1f		# jump if user mode
+
+	rsr	a0, exccause
+	addx4	a0, a0, a3              	# find entry in table
+	l32i	a0, a0, EXC_TABLE_FAST_KERNEL   # load handler
+	l32i	a3, a2, PT_AREG3
+	jx	a0
+1:
+	rsr	a0, exccause
+	addx4	a0, a0, a3              	# find entry in table
+	l32i	a0, a0, EXC_TABLE_FAST_USER     # load handler
+	l32i	a3, a2, PT_AREG3
+	jx	a0
+
+ENDPROC(fast_unaligned_fixup)
+
+#endif /* XCHAL_UNALIGNED_LOAD_EXCEPTION || XCHAL_UNALIGNED_STORE_EXCEPTION */
diff --git a/arch/xtensa/kernel/asm-offsets.c b/arch/xtensa/kernel/asm-offsets.c
new file mode 100644
index 000000000..da38de20a
--- /dev/null
+++ b/arch/xtensa/kernel/asm-offsets.c
@@ -0,0 +1,164 @@
+/*
+ * arch/xtensa/kernel/asm-offsets.c
+ *
+ * Generates definitions from c-type structures used by assembly sources.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2005 Tensilica Inc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ */
+
+#include <asm/processor.h>
+#include <asm/coprocessor.h>
+
+#include <linux/types.h>
+#include <linux/stddef.h>
+#include <linux/thread_info.h>
+#include <linux/ptrace.h>
+#include <linux/mm.h>
+#include <linux/kbuild.h>
+#include <linux/suspend.h>
+
+#include <asm/ptrace.h>
+#include <asm/traps.h>
+#include <linux/uaccess.h>
+
+int main(void)
+{
+	/* struct pt_regs */
+	DEFINE(PT_PC, offsetof (struct pt_regs, pc));
+	DEFINE(PT_PS, offsetof (struct pt_regs, ps));
+	DEFINE(PT_DEPC, offsetof (struct pt_regs, depc));
+	DEFINE(PT_EXCCAUSE, offsetof (struct pt_regs, exccause));
+	DEFINE(PT_EXCVADDR, offsetof (struct pt_regs, excvaddr));
+	DEFINE(PT_DEBUGCAUSE, offsetof (struct pt_regs, debugcause));
+	DEFINE(PT_WMASK, offsetof (struct pt_regs, wmask));
+	DEFINE(PT_LBEG, offsetof (struct pt_regs, lbeg));
+	DEFINE(PT_LEND, offsetof (struct pt_regs, lend));
+	DEFINE(PT_LCOUNT, offsetof (struct pt_regs, lcount));
+	DEFINE(PT_SAR, offsetof (struct pt_regs, sar));
+	DEFINE(PT_ICOUNTLEVEL, offsetof (struct pt_regs, icountlevel));
+	DEFINE(PT_SYSCALL, offsetof (struct pt_regs, syscall));
+	DEFINE(PT_SCOMPARE1, offsetof(struct pt_regs, scompare1));
+	DEFINE(PT_THREADPTR, offsetof(struct pt_regs, threadptr));
+	DEFINE(PT_AREG, offsetof (struct pt_regs, areg[0]));
+	DEFINE(PT_AREG0, offsetof (struct pt_regs, areg[0]));
+	DEFINE(PT_AREG1, offsetof (struct pt_regs, areg[1]));
+	DEFINE(PT_AREG2, offsetof (struct pt_regs, areg[2]));
+	DEFINE(PT_AREG3, offsetof (struct pt_regs, areg[3]));
+	DEFINE(PT_AREG4, offsetof (struct pt_regs, areg[4]));
+	DEFINE(PT_AREG5, offsetof (struct pt_regs, areg[5]));
+	DEFINE(PT_AREG6, offsetof (struct pt_regs, areg[6]));
+	DEFINE(PT_AREG7, offsetof (struct pt_regs, areg[7]));
+	DEFINE(PT_AREG8, offsetof (struct pt_regs, areg[8]));
+	DEFINE(PT_AREG9, offsetof (struct pt_regs, areg[9]));
+	DEFINE(PT_AREG10, offsetof (struct pt_regs, areg[10]));
+	DEFINE(PT_AREG11, offsetof (struct pt_regs, areg[11]));
+	DEFINE(PT_AREG12, offsetof (struct pt_regs, areg[12]));
+	DEFINE(PT_AREG13, offsetof (struct pt_regs, areg[13]));
+	DEFINE(PT_AREG14, offsetof (struct pt_regs, areg[14]));
+	DEFINE(PT_AREG15, offsetof (struct pt_regs, areg[15]));
+	DEFINE(PT_WINDOWBASE, offsetof (struct pt_regs, windowbase));
+	DEFINE(PT_WINDOWSTART, offsetof(struct pt_regs, windowstart));
+	DEFINE(PT_KERNEL_SIZE, offsetof(struct pt_regs, areg[16]));
+	DEFINE(PT_AREG_END, offsetof (struct pt_regs, areg[XCHAL_NUM_AREGS]));
+	DEFINE(PT_USER_SIZE, offsetof(struct pt_regs, areg[XCHAL_NUM_AREGS]));
+	DEFINE(PT_XTREGS_OPT, offsetof(struct pt_regs, xtregs_opt));
+	DEFINE(XTREGS_OPT_SIZE, sizeof(xtregs_opt_t));
+
+	/* struct task_struct */
+	DEFINE(TASK_PTRACE, offsetof (struct task_struct, ptrace));
+	DEFINE(TASK_MM, offsetof (struct task_struct, mm));
+	DEFINE(TASK_ACTIVE_MM, offsetof (struct task_struct, active_mm));
+	DEFINE(TASK_PID, offsetof (struct task_struct, pid));
+	DEFINE(TASK_THREAD, offsetof (struct task_struct, thread));
+	DEFINE(TASK_THREAD_INFO, offsetof (struct task_struct, stack));
+#ifdef CONFIG_STACKPROTECTOR
+	DEFINE(TASK_STACK_CANARY, offsetof(struct task_struct, stack_canary));
+#endif
+	DEFINE(TASK_STRUCT_SIZE, sizeof (struct task_struct));
+
+	/* offsets in thread_info struct */
+	OFFSET(TI_TASK, thread_info, task);
+	OFFSET(TI_FLAGS, thread_info, flags);
+	OFFSET(TI_STSTUS, thread_info, status);
+	OFFSET(TI_CPU, thread_info, cpu);
+	OFFSET(TI_PRE_COUNT, thread_info, preempt_count);
+#ifdef CONFIG_USER_ABI_CALL0_PROBE
+	OFFSET(TI_PS_WOE_FIX_ADDR, thread_info, ps_woe_fix_addr);
+#endif
+
+	/* struct thread_info (offset from start_struct) */
+	DEFINE(THREAD_RA, offsetof (struct task_struct, thread.ra));
+	DEFINE(THREAD_SP, offsetof (struct task_struct, thread.sp));
+#if XCHAL_HAVE_EXCLUSIVE
+	DEFINE(THREAD_ATOMCTL8, offsetof (struct thread_info, atomctl8));
+#endif
+	DEFINE(THREAD_CPENABLE, offsetof(struct thread_info, cpenable));
+	DEFINE(THREAD_CPU, offsetof(struct thread_info, cpu));
+	DEFINE(THREAD_CP_OWNER_CPU, offsetof(struct thread_info, cp_owner_cpu));
+#if XTENSA_HAVE_COPROCESSORS
+	DEFINE(THREAD_XTREGS_CP0, offsetof(struct thread_info, xtregs_cp.cp0));
+	DEFINE(THREAD_XTREGS_CP1, offsetof(struct thread_info, xtregs_cp.cp1));
+	DEFINE(THREAD_XTREGS_CP2, offsetof(struct thread_info, xtregs_cp.cp2));
+	DEFINE(THREAD_XTREGS_CP3, offsetof(struct thread_info, xtregs_cp.cp3));
+	DEFINE(THREAD_XTREGS_CP4, offsetof(struct thread_info, xtregs_cp.cp4));
+	DEFINE(THREAD_XTREGS_CP5, offsetof(struct thread_info, xtregs_cp.cp5));
+	DEFINE(THREAD_XTREGS_CP6, offsetof(struct thread_info, xtregs_cp.cp6));
+	DEFINE(THREAD_XTREGS_CP7, offsetof(struct thread_info, xtregs_cp.cp7));
+#endif
+	DEFINE(THREAD_XTREGS_USER, offsetof (struct thread_info, xtregs_user));
+	DEFINE(XTREGS_USER_SIZE, sizeof(xtregs_user_t));
+
+	/* struct mm_struct */
+	DEFINE(MM_USERS, offsetof(struct mm_struct, mm_users));
+	DEFINE(MM_PGD, offsetof (struct mm_struct, pgd));
+	DEFINE(MM_CONTEXT, offsetof (struct mm_struct, context));
+
+	/* struct page */
+	DEFINE(PAGE_FLAGS, offsetof(struct page, flags));
+
+	/* constants */
+	DEFINE(_CLONE_VM, CLONE_VM);
+	DEFINE(_CLONE_UNTRACED, CLONE_UNTRACED);
+	DEFINE(PG_ARCH_1, PG_arch_1);
+
+	/* struct debug_table */
+	DEFINE(DT_DEBUG_EXCEPTION,
+	       offsetof(struct debug_table, debug_exception));
+	DEFINE(DT_DEBUG_SAVE, offsetof(struct debug_table, debug_save));
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+	DEFINE(DT_DBREAKC_SAVE, offsetof(struct debug_table, dbreakc_save));
+	DEFINE(DT_ICOUNT_SAVE, offsetof(struct debug_table, icount_save));
+	DEFINE(DT_ICOUNT_LEVEL_SAVE,
+	       offsetof(struct debug_table, icount_level_save));
+#endif
+
+	/* struct exc_table */
+	DEFINE(EXC_TABLE_KSTK, offsetof(struct exc_table, kstk));
+	DEFINE(EXC_TABLE_DOUBLE_SAVE, offsetof(struct exc_table, double_save));
+	DEFINE(EXC_TABLE_FIXUP, offsetof(struct exc_table, fixup));
+	DEFINE(EXC_TABLE_PARAM, offsetof(struct exc_table, fixup_param));
+#if XTENSA_HAVE_COPROCESSORS
+	DEFINE(EXC_TABLE_COPROCESSOR_OWNER,
+	       offsetof(struct exc_table, coprocessor_owner));
+#endif
+	DEFINE(EXC_TABLE_FAST_USER,
+	       offsetof(struct exc_table, fast_user_handler));
+	DEFINE(EXC_TABLE_FAST_KERNEL,
+	       offsetof(struct exc_table, fast_kernel_handler));
+	DEFINE(EXC_TABLE_DEFAULT, offsetof(struct exc_table, default_handler));
+
+#ifdef CONFIG_HIBERNATION
+	DEFINE(PBE_ADDRESS, offsetof(struct pbe, address));
+	DEFINE(PBE_ORIG_ADDRESS, offsetof(struct pbe, orig_address));
+	DEFINE(PBE_NEXT, offsetof(struct pbe, next));
+	DEFINE(PBE_SIZE, sizeof(struct pbe));
+#endif
+
+	return 0;
+}
diff --git a/arch/xtensa/kernel/coprocessor.S b/arch/xtensa/kernel/coprocessor.S
new file mode 100644
index 000000000..ef33e76e0
--- /dev/null
+++ b/arch/xtensa/kernel/coprocessor.S
@@ -0,0 +1,302 @@
+/*
+ * arch/xtensa/kernel/coprocessor.S
+ *
+ * Xtensa processor configuration-specific table of coprocessor and
+ * other custom register layout information.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2003 - 2007 Tensilica Inc.
+ */
+
+
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+#include <asm/asmmacro.h>
+#include <asm/coprocessor.h>
+#include <asm/current.h>
+#include <asm/regs.h>
+
+/*
+ * Rules for coprocessor state manipulation on SMP:
+ *
+ * - a task may have live coprocessors only on one CPU.
+ *
+ * - whether coprocessor context of task T is live on some CPU is
+ *   denoted by T's thread_info->cpenable.
+ *
+ * - non-zero thread_info->cpenable means that thread_info->cp_owner_cpu
+ *   is valid in the T's thread_info. Zero thread_info->cpenable means that
+ *   coprocessor context is valid in the T's thread_info.
+ *
+ * - if a coprocessor context of task T is live on CPU X, only CPU X changes
+ *   T's thread_info->cpenable, cp_owner_cpu and coprocessor save area.
+ *   This is done by making sure that for the task T with live coprocessor
+ *   on CPU X cpenable SR is 0 when T runs on any other CPU Y.
+ *   When fast_coprocessor exception is taken on CPU Y it goes to the
+ *   C-level do_coprocessor that uses IPI to make CPU X flush T's coprocessors.
+ */
+
+#if XTENSA_HAVE_COPROCESSORS
+
+/*
+ * Macros for lazy context switch. 
+ */
+
+#define SAVE_CP_REGS(x)							\
+	.if XTENSA_HAVE_COPROCESSOR(x);					\
+		.align 4;						\
+	.Lsave_cp_regs_cp##x:						\
+		xchal_cp##x##_store a2 a3 a4 a5 a6;			\
+		ret;							\
+	.endif
+
+#define LOAD_CP_REGS(x)							\
+	.if XTENSA_HAVE_COPROCESSOR(x);					\
+		.align 4;						\
+	.Lload_cp_regs_cp##x:						\
+		xchal_cp##x##_load a2 a3 a4 a5 a6;			\
+		ret;							\
+	.endif
+
+#define CP_REGS_TAB(x)							\
+	.if XTENSA_HAVE_COPROCESSOR(x);					\
+		.long .Lsave_cp_regs_cp##x;				\
+		.long .Lload_cp_regs_cp##x;				\
+	.else;								\
+		.long 0, 0;						\
+	.endif;								\
+	.long THREAD_XTREGS_CP##x
+
+#define CP_REGS_TAB_SAVE 0
+#define CP_REGS_TAB_LOAD 4
+#define CP_REGS_TAB_OFFSET 8
+
+	__XTENSA_HANDLER
+
+	SAVE_CP_REGS(0)
+	SAVE_CP_REGS(1)
+	SAVE_CP_REGS(2)
+	SAVE_CP_REGS(3)
+	SAVE_CP_REGS(4)
+	SAVE_CP_REGS(5)
+	SAVE_CP_REGS(6)
+	SAVE_CP_REGS(7)
+
+	LOAD_CP_REGS(0)
+	LOAD_CP_REGS(1)
+	LOAD_CP_REGS(2)
+	LOAD_CP_REGS(3)
+	LOAD_CP_REGS(4)
+	LOAD_CP_REGS(5)
+	LOAD_CP_REGS(6)
+	LOAD_CP_REGS(7)
+
+	.align 4
+.Lcp_regs_jump_table:
+	CP_REGS_TAB(0)
+	CP_REGS_TAB(1)
+	CP_REGS_TAB(2)
+	CP_REGS_TAB(3)
+	CP_REGS_TAB(4)
+	CP_REGS_TAB(5)
+	CP_REGS_TAB(6)
+	CP_REGS_TAB(7)
+
+/*
+ * Entry condition:
+ *
+ *   a0:	trashed, original value saved on stack (PT_AREG0)
+ *   a1:	a1
+ *   a2:	new stack pointer, original in DEPC
+ *   a3:	a3
+ *   depc:	a2, original value saved on stack (PT_DEPC)
+ *   excsave_1:	dispatch table
+ *
+ *   PT_DEPC >= VALID_DOUBLE_EXCEPTION_ADDRESS: double exception, DEPC
+ *	     <  VALID_DOUBLE_EXCEPTION_ADDRESS: regular exception
+ */
+
+ENTRY(fast_coprocessor)
+
+	s32i	a3, a2, PT_AREG3
+
+#ifdef CONFIG_SMP
+	/*
+	 * Check if any coprocessor context is live on another CPU
+	 * and if so go through the C-level coprocessor exception handler
+	 * to flush it to memory.
+	 */
+	GET_THREAD_INFO (a0, a2)
+	l32i	a3, a0, THREAD_CPENABLE
+	beqz	a3, .Lload_local
+
+	/*
+	 * Pairs with smp_wmb in local_coprocessor_release_all
+	 * and with both memws below.
+	 */
+	memw
+	l32i	a3, a0, THREAD_CPU
+	l32i	a0, a0, THREAD_CP_OWNER_CPU
+	beq	a0, a3, .Lload_local
+
+	rsr	a0, ps
+	l32i	a3, a2, PT_AREG3
+	bbci.l	a0, PS_UM_BIT, 1f
+	call0	user_exception
+1:	call0	kernel_exception
+#endif
+
+	/* Save remaining registers a1-a3 and SAR */
+
+.Lload_local:
+	rsr	a3, sar
+	s32i	a1, a2, PT_AREG1
+	s32i	a3, a2, PT_SAR
+	mov	a1, a2
+	rsr	a2, depc
+	s32i	a2, a1, PT_AREG2
+
+	/* The hal macros require up to 4 temporary registers. We use a3..a6. */
+
+	s32i	a4, a1, PT_AREG4
+	s32i	a5, a1, PT_AREG5
+	s32i	a6, a1, PT_AREG6
+	s32i	a7, a1, PT_AREG7
+	s32i	a8, a1, PT_AREG8
+	s32i	a9, a1, PT_AREG9
+	s32i	a10, a1, PT_AREG10
+
+	/* Find coprocessor number. Subtract first CP EXCCAUSE from EXCCAUSE */
+
+	rsr	a3, exccause
+	addi	a3, a3, -EXCCAUSE_COPROCESSOR0_DISABLED
+
+	/* Set corresponding CPENABLE bit -> (sar:cp-index, a3: 1<<cp-index)*/
+
+	ssl	a3			# SAR: 32 - coprocessor_number
+	movi	a2, 1
+	rsr	a0, cpenable
+	sll	a2, a2
+	or	a0, a0, a2
+	wsr	a0, cpenable
+	rsync
+
+	/* Get coprocessor save/load table entry (a7). */
+
+	movi	a7, .Lcp_regs_jump_table
+	addx8	a7, a3, a7
+	addx4	a7, a3, a7
+
+	/* Retrieve previous owner (a8). */
+
+	rsr	a0, excsave1		# exc_table
+	addx4	a0, a3, a0		# entry for CP
+	l32i	a8, a0, EXC_TABLE_COPROCESSOR_OWNER
+
+	/* Set new owner (a9). */
+
+	GET_THREAD_INFO (a9, a1)
+	l32i	a4, a9, THREAD_CPU
+	s32i	a9, a0, EXC_TABLE_COPROCESSOR_OWNER
+	s32i	a4, a9, THREAD_CP_OWNER_CPU
+
+	/*
+	 * Enable coprocessor for the new owner. (a2 = 1 << CP number)
+	 * This can be done before loading context into the coprocessor.
+	 */
+	l32i	a4, a9, THREAD_CPENABLE
+	or	a4, a4, a2
+
+	/*
+	 * Make sure THREAD_CP_OWNER_CPU is in memory before updating
+	 * THREAD_CPENABLE
+	 */
+	memw				# (2)
+	s32i	a4, a9, THREAD_CPENABLE
+
+	beqz	a8, 1f			# skip 'save' if no previous owner
+
+	/* Disable coprocessor for previous owner. (a2 = 1 << CP number) */
+
+	l32i	a10, a8, THREAD_CPENABLE
+	xor	a10, a10, a2
+
+	/* Get context save area and call save routine. */
+
+	l32i	a2, a7, CP_REGS_TAB_OFFSET
+	l32i	a3, a7, CP_REGS_TAB_SAVE
+	add	a2, a2, a8
+	callx0	a3
+
+	/*
+	 * Make sure coprocessor context and THREAD_CP_OWNER_CPU are in memory
+	 * before updating THREAD_CPENABLE
+	 */
+	memw				# (3)
+	s32i	a10, a8, THREAD_CPENABLE
+1:
+	/* Get context save area and call load routine. */
+
+	l32i	a2, a7, CP_REGS_TAB_OFFSET
+	l32i	a3, a7, CP_REGS_TAB_LOAD
+	add	a2, a2, a9
+	callx0	a3
+
+	/* Restore all registers and return from exception handler. */
+
+	l32i	a10, a1, PT_AREG10
+	l32i	a9, a1, PT_AREG9
+	l32i	a8, a1, PT_AREG8
+	l32i	a7, a1, PT_AREG7
+	l32i	a6, a1, PT_AREG6
+	l32i	a5, a1, PT_AREG5
+	l32i	a4, a1, PT_AREG4
+
+	l32i	a0, a1, PT_SAR
+	l32i	a3, a1, PT_AREG3
+	l32i	a2, a1, PT_AREG2
+	wsr	a0, sar
+	l32i	a0, a1, PT_AREG0
+	l32i	a1, a1, PT_AREG1
+
+	rfe
+
+ENDPROC(fast_coprocessor)
+
+	.text
+
+/*
+ * coprocessor_flush(struct thread_info*, index)
+ *                             a2        a3
+ *
+ * Save coprocessor registers for coprocessor 'index'.
+ * The register values are saved to or loaded from the coprocessor area
+ * inside the task_info structure.
+ *
+ * Note that this function doesn't update the coprocessor_owner information!
+ *
+ */
+
+ENTRY(coprocessor_flush)
+
+	abi_entry_default
+
+	movi	a4, .Lcp_regs_jump_table
+	addx8	a4, a3, a4
+	addx4	a3, a3, a4
+	l32i	a4, a3, CP_REGS_TAB_SAVE
+	beqz	a4, 1f
+	l32i	a3, a3, CP_REGS_TAB_OFFSET
+	add	a2, a2, a3
+	mov	a7, a0
+	callx0	a4
+	mov	a0, a7
+1:
+	abi_ret_default
+
+ENDPROC(coprocessor_flush)
+
+#endif /* XTENSA_HAVE_COPROCESSORS */
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S
new file mode 100644
index 000000000..272fff587
--- /dev/null
+++ b/arch/xtensa/kernel/entry.S
@@ -0,0 +1,2264 @@
+/*
+ * Low-level exception handling
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2004 - 2008 by Tensilica Inc.
+ * Copyright (C) 2015 Cadence Design Systems Inc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ *
+ */
+
+#include <linux/linkage.h>
+#include <linux/pgtable.h>
+#include <asm/asm-offsets.h>
+#include <asm/asmmacro.h>
+#include <asm/processor.h>
+#include <asm/coprocessor.h>
+#include <asm/thread_info.h>
+#include <asm/asm-uaccess.h>
+#include <asm/unistd.h>
+#include <asm/ptrace.h>
+#include <asm/current.h>
+#include <asm/page.h>
+#include <asm/signal.h>
+#include <asm/tlbflush.h>
+#include <variant/tie-asm.h>
+
+/*
+ * Macro to find first bit set in WINDOWBASE from the left + 1
+ *
+ * 100....0 -> 1
+ * 010....0 -> 2
+ * 000....1 -> WSBITS
+ */
+
+	.macro ffs_ws bit mask
+
+#if XCHAL_HAVE_NSA
+	nsau    \bit, \mask			# 32-WSBITS ... 31 (32 iff 0)
+	addi    \bit, \bit, WSBITS - 32 + 1   	# uppest bit set -> return 1
+#else
+	movi    \bit, WSBITS
+#if WSBITS > 16
+	_bltui  \mask, 0x10000, 99f
+	addi    \bit, \bit, -16
+	extui   \mask, \mask, 16, 16
+#endif
+#if WSBITS > 8
+99:	_bltui  \mask, 0x100, 99f
+	addi    \bit, \bit, -8
+	srli    \mask, \mask, 8
+#endif
+99:	_bltui  \mask, 0x10, 99f
+	addi    \bit, \bit, -4
+	srli    \mask, \mask, 4
+99:	_bltui  \mask, 0x4, 99f
+	addi    \bit, \bit, -2
+	srli    \mask, \mask, 2
+99:	_bltui  \mask, 0x2, 99f
+	addi    \bit, \bit, -1
+99:
+
+#endif
+	.endm
+
+
+	.macro	irq_save flags tmp
+#if XTENSA_FAKE_NMI
+#if defined(CONFIG_DEBUG_KERNEL) && (LOCKLEVEL | TOPLEVEL) >= XCHAL_DEBUGLEVEL
+	rsr	\flags, ps
+	extui	\tmp, \flags, PS_INTLEVEL_SHIFT, PS_INTLEVEL_WIDTH
+	bgei	\tmp, LOCKLEVEL, 99f
+	rsil	\tmp, LOCKLEVEL
+99:
+#else
+	movi	\tmp, LOCKLEVEL
+	rsr	\flags, ps
+	or	\flags, \flags, \tmp
+	xsr	\flags, ps
+	rsync
+#endif
+#else
+	rsil	\flags, LOCKLEVEL
+#endif
+	.endm
+
+/* ----------------- DEFAULT FIRST LEVEL EXCEPTION HANDLERS ----------------- */
+
+/*
+ * First-level exception handler for user exceptions.
+ * Save some special registers, extra states and all registers in the AR
+ * register file that were in use in the user task, and jump to the common
+ * exception code.
+ * We save SAR (used to calculate WMASK), and WB and WS (we don't have to
+ * save them for kernel exceptions).
+ *
+ * Entry condition for user_exception:
+ *
+ *   a0:	trashed, original value saved on stack (PT_AREG0)
+ *   a1:	a1
+ *   a2:	new stack pointer, original value in depc
+ *   a3:	a3
+ *   depc:	a2, original value saved on stack (PT_DEPC)
+ *   excsave1:	dispatch table
+ *
+ *   PT_DEPC >= VALID_DOUBLE_EXCEPTION_ADDRESS: double exception, DEPC
+ *	     <  VALID_DOUBLE_EXCEPTION_ADDRESS: regular exception
+ *
+ * Entry condition for _user_exception:
+ *
+ *   a0-a3 and depc have been saved to PT_AREG0...PT_AREG3 and PT_DEPC
+ *   excsave has been restored, and
+ *   stack pointer (a1) has been set.
+ *
+ * Note: _user_exception might be at an odd address. Don't use call0..call12
+ */
+	.literal_position
+
+ENTRY(user_exception)
+
+	/* Save a1, a2, a3, and set SP. */
+
+	rsr	a0, depc
+	s32i	a1, a2, PT_AREG1
+	s32i	a0, a2, PT_AREG2
+	s32i	a3, a2, PT_AREG3
+	mov	a1, a2
+
+	.globl _user_exception
+_user_exception:
+
+	/* Save SAR and turn off single stepping */
+
+	movi	a2, 0
+	wsr	a2, depc		# terminate user stack trace with 0
+	rsr	a3, sar
+	xsr	a2, icountlevel
+	s32i	a3, a1, PT_SAR
+	s32i	a2, a1, PT_ICOUNTLEVEL
+
+#if XCHAL_HAVE_THREADPTR
+	rur	a2, threadptr
+	s32i	a2, a1, PT_THREADPTR
+#endif
+
+	/* Rotate ws so that the current windowbase is at bit0. */
+	/* Assume ws = xxwww1yyyy. Rotate ws right, so that a2 = yyyyxxwww1 */
+
+#if defined(USER_SUPPORT_WINDOWED)
+	rsr	a2, windowbase
+	rsr	a3, windowstart
+	ssr	a2
+	s32i	a2, a1, PT_WINDOWBASE
+	s32i	a3, a1, PT_WINDOWSTART
+	slli	a2, a3, 32-WSBITS
+	src	a2, a3, a2
+	srli	a2, a2, 32-WSBITS
+	s32i	a2, a1, PT_WMASK	# needed for restoring registers
+#else
+	movi	a2, 0
+	movi	a3, 1
+	s32i	a2, a1, PT_WINDOWBASE
+	s32i	a3, a1, PT_WINDOWSTART
+	s32i	a3, a1, PT_WMASK
+#endif
+
+	/* Save only live registers. */
+
+UABI_W	_bbsi.l	a2, 1, .Lsave_window_registers
+	s32i	a4, a1, PT_AREG4
+	s32i	a5, a1, PT_AREG5
+	s32i	a6, a1, PT_AREG6
+	s32i	a7, a1, PT_AREG7
+UABI_W	_bbsi.l	a2, 2, .Lsave_window_registers
+	s32i	a8, a1, PT_AREG8
+	s32i	a9, a1, PT_AREG9
+	s32i	a10, a1, PT_AREG10
+	s32i	a11, a1, PT_AREG11
+UABI_W	_bbsi.l	a2, 3, .Lsave_window_registers
+	s32i	a12, a1, PT_AREG12
+	s32i	a13, a1, PT_AREG13
+	s32i	a14, a1, PT_AREG14
+	s32i	a15, a1, PT_AREG15
+
+#if defined(USER_SUPPORT_WINDOWED)
+	/* If only one valid frame skip saving regs. */
+
+	beqi	a2, 1, common_exception
+
+	/* Save the remaining registers.
+	 * We have to save all registers up to the first '1' from
+	 * the right, except the current frame (bit 0).
+	 * Assume a2 is:  001001000110001
+	 * All register frames starting from the top field to the marked '1'
+	 * must be saved.
+	 */
+.Lsave_window_registers:
+	addi	a3, a2, -1		# eliminate '1' in bit 0: yyyyxxww0
+	neg	a3, a3			# yyyyxxww0 -> YYYYXXWW1+1
+	and	a3, a3, a2		# max. only one bit is set
+
+	/* Find number of frames to save */
+
+	ffs_ws	a0, a3			# number of frames to the '1' from left
+
+	/* Store information into WMASK:
+	 * bits 0..3: xxx1 masked lower 4 bits of the rotated windowstart,
+	 * bits 4...: number of valid 4-register frames
+	 */
+
+	slli	a3, a0, 4		# number of frames to save in bits 8..4
+	extui	a2, a2, 0, 4		# mask for the first 16 registers
+	or	a2, a3, a2
+	s32i	a2, a1, PT_WMASK	# needed when we restore the reg-file
+
+	/* Save 4 registers at a time */
+
+1:	rotw	-1
+	s32i	a0, a5, PT_AREG_END - 16
+	s32i	a1, a5, PT_AREG_END - 12
+	s32i	a2, a5, PT_AREG_END - 8
+	s32i	a3, a5, PT_AREG_END - 4
+	addi	a0, a4, -1
+	addi	a1, a5, -16
+	_bnez	a0, 1b
+
+	/* WINDOWBASE still in SAR! */
+
+	rsr	a2, sar			# original WINDOWBASE
+	movi	a3, 1
+	ssl	a2
+	sll	a3, a3
+	wsr	a3, windowstart		# set corresponding WINDOWSTART bit
+	wsr	a2, windowbase		# and WINDOWSTART
+	rsync
+
+	/* We are back to the original stack pointer (a1) */
+#endif
+	/* Now, jump to the common exception handler. */
+
+	j	common_exception
+
+ENDPROC(user_exception)
+
+/*
+ * First-level exit handler for kernel exceptions
+ * Save special registers and the live window frame.
+ * Note: Even though we changes the stack pointer, we don't have to do a
+ *	 MOVSP here, as we do that when we return from the exception.
+ *	 (See comment in the kernel exception exit code)
+ *
+ * Entry condition for kernel_exception:
+ *
+ *   a0:	trashed, original value saved on stack (PT_AREG0)
+ *   a1:	a1
+ *   a2:	new stack pointer, original in DEPC
+ *   a3:	a3
+ *   depc:	a2, original value saved on stack (PT_DEPC)
+ *   excsave_1:	dispatch table
+ *
+ *   PT_DEPC >= VALID_DOUBLE_EXCEPTION_ADDRESS: double exception, DEPC
+ *	     <  VALID_DOUBLE_EXCEPTION_ADDRESS: regular exception
+ *
+ * Entry condition for _kernel_exception:
+ *
+ *   a0-a3 and depc have been saved to PT_AREG0...PT_AREG3 and PT_DEPC
+ *   excsave has been restored, and
+ *   stack pointer (a1) has been set.
+ *
+ * Note: _kernel_exception might be at an odd address. Don't use call0..call12
+ */
+
+ENTRY(kernel_exception)
+
+	/* Save a1, a2, a3, and set SP. */
+
+	rsr	a0, depc		# get a2
+	s32i	a1, a2, PT_AREG1
+	s32i	a0, a2, PT_AREG2
+	s32i	a3, a2, PT_AREG3
+	mov	a1, a2
+
+	.globl _kernel_exception
+_kernel_exception:
+
+	/* Save SAR and turn off single stepping */
+
+	movi	a2, 0
+	rsr	a3, sar
+	xsr	a2, icountlevel
+	s32i	a3, a1, PT_SAR
+	s32i	a2, a1, PT_ICOUNTLEVEL
+
+#if defined(__XTENSA_WINDOWED_ABI__)
+	/* Rotate ws so that the current windowbase is at bit0. */
+	/* Assume ws = xxwww1yyyy. Rotate ws right, so that a2 = yyyyxxwww1 */
+
+	rsr	a2, windowbase		# don't need to save these, we only
+	rsr	a3, windowstart		# need shifted windowstart: windowmask
+	ssr	a2
+	slli	a2, a3, 32-WSBITS
+	src	a2, a3, a2
+	srli	a2, a2, 32-WSBITS
+	s32i	a2, a1, PT_WMASK	# needed for kernel_exception_exit
+#endif
+
+	/* Save only the live window-frame */
+
+KABI_W	_bbsi.l	a2, 1, 1f
+	s32i	a4, a1, PT_AREG4
+	s32i	a5, a1, PT_AREG5
+	s32i	a6, a1, PT_AREG6
+	s32i	a7, a1, PT_AREG7
+KABI_W	_bbsi.l	a2, 2, 1f
+	s32i	a8, a1, PT_AREG8
+	s32i	a9, a1, PT_AREG9
+	s32i	a10, a1, PT_AREG10
+	s32i	a11, a1, PT_AREG11
+KABI_W	_bbsi.l	a2, 3, 1f
+	s32i	a12, a1, PT_AREG12
+	s32i	a13, a1, PT_AREG13
+	s32i	a14, a1, PT_AREG14
+	s32i	a15, a1, PT_AREG15
+
+#ifdef __XTENSA_WINDOWED_ABI__
+	_bnei	a2, 1, 1f
+	/* Copy spill slots of a0 and a1 to imitate movsp
+	 * in order to keep exception stack continuous
+	 */
+	l32i	a3, a1, PT_KERNEL_SIZE
+	l32i	a0, a1, PT_KERNEL_SIZE + 4
+	s32e	a3, a1, -16
+	s32e	a0, a1, -12
+#endif
+1:
+	l32i	a0, a1, PT_AREG0	# restore saved a0
+	wsr	a0, depc
+
+/*
+ * This is the common exception handler.
+ * We get here from the user exception handler or simply by falling through
+ * from the kernel exception handler.
+ * Save the remaining special registers, switch to kernel mode, and jump
+ * to the second-level exception handler.
+ *
+ */
+
+common_exception:
+
+	/* Save some registers, disable loops and clear the syscall flag. */
+
+	rsr	a2, debugcause
+	rsr	a3, epc1
+	s32i	a2, a1, PT_DEBUGCAUSE
+	s32i	a3, a1, PT_PC
+
+	movi	a2, NO_SYSCALL
+	rsr	a3, excvaddr
+	s32i	a2, a1, PT_SYSCALL
+	movi	a2, 0
+	s32i	a3, a1, PT_EXCVADDR
+#if XCHAL_HAVE_LOOPS
+	xsr	a2, lcount
+	s32i	a2, a1, PT_LCOUNT
+#endif
+
+#if XCHAL_HAVE_EXCLUSIVE
+	/* Clear exclusive access monitor set by interrupted code */
+	clrex
+#endif
+
+	/* It is now save to restore the EXC_TABLE_FIXUP variable. */
+
+	rsr	a2, exccause
+	movi	a3, 0
+	rsr	a0, excsave1
+	s32i	a2, a1, PT_EXCCAUSE
+	s32i	a3, a0, EXC_TABLE_FIXUP
+
+	/* All unrecoverable states are saved on stack, now, and a1 is valid.
+	 * Now we can allow exceptions again. In case we've got an interrupt
+	 * PS.INTLEVEL is set to LOCKLEVEL disabling furhter interrupts,
+	 * otherwise it's left unchanged.
+	 *
+	 * Set PS(EXCM = 0, UM = 0, RING = 0, OWB = 0, WOE = 1, INTLEVEL = X)
+	 */
+
+	rsr	a3, ps
+	s32i	a3, a1, PT_PS		# save ps
+
+#if XTENSA_FAKE_NMI
+	/* Correct PS needs to be saved in the PT_PS:
+	 * - in case of exception or level-1 interrupt it's in the PS,
+	 *   and is already saved.
+	 * - in case of medium level interrupt it's in the excsave2.
+	 */
+	movi	a0, EXCCAUSE_MAPPED_NMI
+	extui	a3, a3, PS_INTLEVEL_SHIFT, PS_INTLEVEL_WIDTH
+	beq	a2, a0, .Lmedium_level_irq
+	bnei	a2, EXCCAUSE_LEVEL1_INTERRUPT, .Lexception
+	beqz	a3, .Llevel1_irq	# level-1 IRQ sets ps.intlevel to 0
+
+.Lmedium_level_irq:
+	rsr	a0, excsave2
+	s32i	a0, a1, PT_PS		# save medium-level interrupt ps
+	bgei	a3, LOCKLEVEL, .Lexception
+
+.Llevel1_irq:
+	movi	a3, LOCKLEVEL
+
+.Lexception:
+KABI_W	movi	a0, PS_WOE_MASK
+KABI_W	or	a3, a3, a0
+#else
+	addi	a2, a2, -EXCCAUSE_LEVEL1_INTERRUPT
+	movi	a0, LOCKLEVEL
+	extui	a3, a3, PS_INTLEVEL_SHIFT, PS_INTLEVEL_WIDTH
+					# a3 = PS.INTLEVEL
+	moveqz	a3, a0, a2		# a3 = LOCKLEVEL iff interrupt
+KABI_W	movi	a2, PS_WOE_MASK
+KABI_W	or	a3, a3, a2
+#endif
+
+	/* restore return address (or 0 if return to userspace) */
+	rsr	a0, depc
+	wsr	a3, ps
+	rsync				# PS.WOE => rsync => overflow
+
+	/* Save lbeg, lend */
+#if XCHAL_HAVE_LOOPS
+	rsr	a4, lbeg
+	rsr	a3, lend
+	s32i	a4, a1, PT_LBEG
+	s32i	a3, a1, PT_LEND
+#endif
+
+	/* Save SCOMPARE1 */
+
+#if XCHAL_HAVE_S32C1I
+	rsr     a3, scompare1
+	s32i    a3, a1, PT_SCOMPARE1
+#endif
+
+	/* Save optional registers. */
+
+	save_xtregs_opt a1 a3 a4 a5 a6 a7 PT_XTREGS_OPT
+	
+#ifdef CONFIG_TRACE_IRQFLAGS
+	rsr		abi_tmp0, ps
+	extui		abi_tmp0, abi_tmp0, PS_INTLEVEL_SHIFT, PS_INTLEVEL_WIDTH
+	beqz		abi_tmp0, 1f
+	abi_call	trace_hardirqs_off
+1:
+#endif
+#ifdef CONFIG_CONTEXT_TRACKING_USER
+	l32i		abi_tmp0, a1, PT_PS
+	bbci.l		abi_tmp0, PS_UM_BIT, 1f
+	abi_call	user_exit_callable
+1:
+#endif
+
+	/* Go to second-level dispatcher. Set up parameters to pass to the
+	 * exception handler and call the exception handler.
+	 */
+
+	l32i		abi_arg1, a1, PT_EXCCAUSE	# pass EXCCAUSE
+	rsr		abi_tmp0, excsave1
+	addx4		abi_tmp0, abi_arg1, abi_tmp0
+	l32i		abi_tmp0, abi_tmp0, EXC_TABLE_DEFAULT	# load handler
+	mov		abi_arg0, a1			# pass stack frame
+
+	/* Call the second-level handler */
+
+	abi_callx	abi_tmp0
+
+	/* Jump here for exception exit */
+	.global common_exception_return
+common_exception_return:
+
+#if XTENSA_FAKE_NMI
+	l32i		abi_tmp0, a1, PT_EXCCAUSE
+	movi		abi_tmp1, EXCCAUSE_MAPPED_NMI
+	l32i		abi_saved1, a1, PT_PS
+	beq		abi_tmp0, abi_tmp1, .Lrestore_state
+#endif
+.Ltif_loop:
+	irq_save	abi_tmp0, abi_tmp1
+#ifdef CONFIG_TRACE_IRQFLAGS
+	abi_call	trace_hardirqs_off
+#endif
+
+	/* Jump if we are returning from kernel exceptions. */
+
+	l32i		abi_saved1, a1, PT_PS
+	GET_THREAD_INFO(abi_tmp0, a1)
+	l32i		abi_saved0, abi_tmp0, TI_FLAGS
+	_bbci.l		abi_saved1, PS_UM_BIT, .Lexit_tif_loop_kernel
+
+	/* Specific to a user exception exit:
+	 * We need to check some flags for signal handling and rescheduling,
+	 * and have to restore WB and WS, extra states, and all registers
+	 * in the register file that were in use in the user task.
+	 * Note that we don't disable interrupts here. 
+	 */
+
+	_bbsi.l		abi_saved0, TIF_NEED_RESCHED, .Lresched
+	movi		abi_tmp0, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NOTIFY_SIGNAL
+	bnone		abi_saved0, abi_tmp0, .Lexit_tif_loop_user
+
+	l32i		abi_tmp0, a1, PT_DEPC
+	bgeui		abi_tmp0, VALID_DOUBLE_EXCEPTION_ADDRESS, .Lrestore_state
+
+	/* Call do_signal() */
+
+#ifdef CONFIG_TRACE_IRQFLAGS
+	abi_call	trace_hardirqs_on
+#endif
+	rsil		abi_tmp0, 0
+	mov		abi_arg0, a1
+	abi_call	do_notify_resume	# int do_notify_resume(struct pt_regs*)
+	j		.Ltif_loop
+
+.Lresched:
+#ifdef CONFIG_TRACE_IRQFLAGS
+	abi_call	trace_hardirqs_on
+#endif
+	rsil		abi_tmp0, 0
+	abi_call	schedule	# void schedule (void)
+	j		.Ltif_loop
+
+.Lexit_tif_loop_kernel:
+#ifdef CONFIG_PREEMPTION
+	_bbci.l		abi_saved0, TIF_NEED_RESCHED, .Lrestore_state
+
+	/* Check current_thread_info->preempt_count */
+
+	l32i		abi_tmp1, abi_tmp0, TI_PRE_COUNT
+	bnez		abi_tmp1, .Lrestore_state
+	abi_call	preempt_schedule_irq
+#endif
+	j		.Lrestore_state
+
+.Lexit_tif_loop_user:
+#ifdef CONFIG_CONTEXT_TRACKING_USER
+	abi_call	user_enter_callable
+#endif
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+	_bbci.l		abi_saved0, TIF_DB_DISABLED, 1f
+	abi_call	restore_dbreak
+1:
+#endif
+#ifdef CONFIG_DEBUG_TLB_SANITY
+	l32i		abi_tmp0, a1, PT_DEPC
+	bgeui		abi_tmp0, VALID_DOUBLE_EXCEPTION_ADDRESS, .Lrestore_state
+	abi_call	check_tlb_sanity
+#endif
+
+.Lrestore_state:
+#ifdef CONFIG_TRACE_IRQFLAGS
+	extui		abi_tmp0, abi_saved1, PS_INTLEVEL_SHIFT, PS_INTLEVEL_WIDTH
+	bgei		abi_tmp0, LOCKLEVEL, 1f
+	abi_call	trace_hardirqs_on
+1:
+#endif
+	/*
+	 * Restore optional registers.
+	 * abi_arg* are used as temporary registers here.
+	 */
+
+	load_xtregs_opt a1 abi_tmp0 abi_arg0 abi_arg1 abi_arg2 abi_arg3 PT_XTREGS_OPT
+
+	/* Restore SCOMPARE1 */
+
+#if XCHAL_HAVE_S32C1I
+	l32i		abi_tmp0, a1, PT_SCOMPARE1
+	wsr		abi_tmp0, scompare1
+#endif
+	wsr		abi_saved1, ps		/* disable interrupts */
+	_bbci.l		abi_saved1, PS_UM_BIT, kernel_exception_exit
+
+user_exception_exit:
+
+	/* Restore the state of the task and return from the exception. */
+
+#if defined(USER_SUPPORT_WINDOWED)
+	/* Switch to the user thread WINDOWBASE. Save SP temporarily in DEPC */
+
+	l32i	a2, a1, PT_WINDOWBASE
+	l32i	a3, a1, PT_WINDOWSTART
+	wsr	a1, depc		# use DEPC as temp storage
+	wsr	a3, windowstart		# restore WINDOWSTART
+	ssr	a2			# preserve user's WB in the SAR
+	wsr	a2, windowbase		# switch to user's saved WB
+	rsync
+	rsr	a1, depc		# restore stack pointer
+	l32i	a2, a1, PT_WMASK	# register frames saved (in bits 4...9)
+	rotw	-1			# we restore a4..a7
+	_bltui	a6, 16, .Lclear_regs	# only have to restore current window?
+
+	/* The working registers are a0 and a3.  We are restoring to
+	 * a4..a7.  Be careful not to destroy what we have just restored.
+	 * Note: wmask has the format YYYYM:
+	 *       Y: number of registers saved in groups of 4
+	 *       M: 4 bit mask of first 16 registers
+	 */
+
+	mov	a2, a6
+	mov	a3, a5
+
+1:	rotw	-1			# a0..a3 become a4..a7
+	addi	a3, a7, -4*4		# next iteration
+	addi	a2, a6, -16		# decrementing Y in WMASK
+	l32i	a4, a3, PT_AREG_END + 0
+	l32i	a5, a3, PT_AREG_END + 4
+	l32i	a6, a3, PT_AREG_END + 8
+	l32i	a7, a3, PT_AREG_END + 12
+	_bgeui	a2, 16, 1b
+
+	/* Clear unrestored registers (don't leak anything to user-land */
+
+.Lclear_regs:
+	rsr	a0, windowbase
+	rsr	a3, sar
+	sub	a3, a0, a3
+	beqz	a3, 2f
+	extui	a3, a3, 0, WBBITS
+
+1:	rotw	-1
+	addi	a3, a7, -1
+	movi	a4, 0
+	movi	a5, 0
+	movi	a6, 0
+	movi	a7, 0
+	bgei	a3, 1, 1b
+
+	/* We are back were we were when we started.
+	 * Note: a2 still contains WMASK (if we've returned to the original
+	 *	 frame where we had loaded a2), or at least the lower 4 bits
+	 *	 (if we have restored WSBITS-1 frames).
+	 */
+2:
+#else
+	movi	a2, 1
+#endif
+#if XCHAL_HAVE_THREADPTR
+	l32i	a3, a1, PT_THREADPTR
+	wur	a3, threadptr
+#endif
+
+	j	common_exception_exit
+
+	/* This is the kernel exception exit.
+	 * We avoided to do a MOVSP when we entered the exception, but we
+	 * have to do it here.
+	 */
+
+kernel_exception_exit:
+
+#if defined(__XTENSA_WINDOWED_ABI__)
+	/* Check if we have to do a movsp.
+	 *
+	 * We only have to do a movsp if the previous window-frame has
+	 * been spilled to the *temporary* exception stack instead of the
+	 * task's stack. This is the case if the corresponding bit in
+	 * WINDOWSTART for the previous window-frame was set before
+	 * (not spilled) but is zero now (spilled).
+	 * If this bit is zero, all other bits except the one for the
+	 * current window frame are also zero. So, we can use a simple test:
+	 * 'and' WINDOWSTART and WINDOWSTART-1:
+	 *
+	 *  (XXXXXX1[0]* - 1) AND XXXXXX1[0]* = XXXXXX0[0]*
+	 *
+	 * The result is zero only if one bit was set.
+	 *
+	 * (Note: We might have gone through several task switches before
+	 *        we come back to the current task, so WINDOWBASE might be
+	 *        different from the time the exception occurred.)
+	 */
+
+	/* Test WINDOWSTART before and after the exception.
+	 * We actually have WMASK, so we only have to test if it is 1 or not.
+	 */
+
+	l32i	a2, a1, PT_WMASK
+	_beqi	a2, 1, common_exception_exit	# Spilled before exception,jump
+
+	/* Test WINDOWSTART now. If spilled, do the movsp */
+
+	rsr     a3, windowstart
+	addi	a0, a3, -1
+	and     a3, a3, a0
+	_bnez	a3, common_exception_exit
+
+	/* Do a movsp (we returned from a call4, so we have at least a0..a7) */
+
+	addi    a0, a1, -16
+	l32i    a3, a0, 0
+	l32i    a4, a0, 4
+	s32i    a3, a1, PT_KERNEL_SIZE + 0
+	s32i    a4, a1, PT_KERNEL_SIZE + 4
+	l32i    a3, a0, 8
+	l32i    a4, a0, 12
+	s32i    a3, a1, PT_KERNEL_SIZE + 8
+	s32i    a4, a1, PT_KERNEL_SIZE + 12
+
+	/* Common exception exit.
+	 * We restore the special register and the current window frame, and
+	 * return from the exception.
+	 *
+	 * Note: We expect a2 to hold PT_WMASK
+	 */
+#else
+	movi	a2, 1
+#endif
+
+common_exception_exit:
+
+	/* Restore address registers. */
+
+	_bbsi.l	a2, 1, 1f
+	l32i	a4,  a1, PT_AREG4
+	l32i	a5,  a1, PT_AREG5
+	l32i	a6,  a1, PT_AREG6
+	l32i	a7,  a1, PT_AREG7
+	_bbsi.l	a2, 2, 1f
+	l32i	a8,  a1, PT_AREG8
+	l32i	a9,  a1, PT_AREG9
+	l32i	a10, a1, PT_AREG10
+	l32i	a11, a1, PT_AREG11
+	_bbsi.l	a2, 3, 1f
+	l32i	a12, a1, PT_AREG12
+	l32i	a13, a1, PT_AREG13
+	l32i	a14, a1, PT_AREG14
+	l32i	a15, a1, PT_AREG15
+
+	/* Restore PC, SAR */
+
+1:	l32i	a2, a1, PT_PC
+	l32i	a3, a1, PT_SAR
+	wsr	a2, epc1
+	wsr	a3, sar
+
+	/* Restore LBEG, LEND, LCOUNT */
+#if XCHAL_HAVE_LOOPS
+	l32i	a2, a1, PT_LBEG
+	l32i	a3, a1, PT_LEND
+	wsr	a2, lbeg
+	l32i	a2, a1, PT_LCOUNT
+	wsr	a3, lend
+	wsr	a2, lcount
+#endif
+
+	/* We control single stepping through the ICOUNTLEVEL register. */
+
+	l32i	a2, a1, PT_ICOUNTLEVEL
+	movi	a3, -2
+	wsr	a2, icountlevel
+	wsr	a3, icount
+
+	/* Check if it was double exception. */
+
+	l32i	a0, a1, PT_DEPC
+	l32i	a3, a1, PT_AREG3
+	l32i	a2, a1, PT_AREG2
+	_bgeui	a0, VALID_DOUBLE_EXCEPTION_ADDRESS, 1f
+
+	/* Restore a0...a3 and return */
+
+	l32i	a0, a1, PT_AREG0
+	l32i	a1, a1, PT_AREG1
+	rfe
+
+1: 	wsr	a0, depc
+	l32i	a0, a1, PT_AREG0
+	l32i	a1, a1, PT_AREG1
+	rfde
+
+ENDPROC(kernel_exception)
+
+/*
+ * Debug exception handler.
+ *
+ * Currently, we don't support KGDB, so only user application can be debugged.
+ *
+ * When we get here,  a0 is trashed and saved to excsave[debuglevel]
+ */
+
+	.literal_position
+
+ENTRY(debug_exception)
+
+	rsr	a0, SREG_EPS + XCHAL_DEBUGLEVEL
+	bbsi.l	a0, PS_EXCM_BIT, .Ldebug_exception_in_exception	# exception mode
+
+	/* Set EPC1 and EXCCAUSE */
+
+	wsr	a2, depc		# save a2 temporarily
+	rsr	a2, SREG_EPC + XCHAL_DEBUGLEVEL
+	wsr	a2, epc1
+
+	movi	a2, EXCCAUSE_MAPPED_DEBUG
+	wsr	a2, exccause
+
+	/* Restore PS to the value before the debug exc but with PS.EXCM set.*/
+
+	movi	a2, 1 << PS_EXCM_BIT
+	or	a2, a0, a2
+	wsr	a2, ps
+
+	/* Switch to kernel/user stack, restore jump vector, and save a0 */
+
+	bbsi.l	a2, PS_UM_BIT, .Ldebug_exception_user	# jump if user mode
+	addi	a2, a1, -16 - PT_KERNEL_SIZE	# assume kernel stack
+
+.Ldebug_exception_continue:
+	l32i	a0, a3, DT_DEBUG_SAVE
+	s32i	a1, a2, PT_AREG1
+	s32i	a0, a2, PT_AREG0
+	movi	a0, 0
+	s32i	a0, a2, PT_DEPC		# mark it as a regular exception
+	xsr	a3, SREG_EXCSAVE + XCHAL_DEBUGLEVEL
+	xsr	a0, depc
+	s32i	a3, a2, PT_AREG3
+	s32i	a0, a2, PT_AREG2
+	mov	a1, a2
+
+	/* Debug exception is handled as an exception, so interrupts will
+	 * likely be enabled in the common exception handler. Disable
+	 * preemption if we have HW breakpoints to preserve DEBUGCAUSE.DBNUM
+	 * meaning.
+	 */
+#if defined(CONFIG_PREEMPT_COUNT) && defined(CONFIG_HAVE_HW_BREAKPOINT)
+	GET_THREAD_INFO(a2, a1)
+	l32i	a3, a2, TI_PRE_COUNT
+	addi	a3, a3, 1
+	s32i	a3, a2, TI_PRE_COUNT
+#endif
+
+	rsr	a2, ps
+	bbsi.l	a2, PS_UM_BIT, _user_exception
+	j	_kernel_exception
+
+.Ldebug_exception_user:
+	rsr	a2, excsave1
+	l32i	a2, a2, EXC_TABLE_KSTK	# load kernel stack pointer
+	j	.Ldebug_exception_continue
+
+.Ldebug_exception_in_exception:
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+	/* Debug exception while in exception mode. This may happen when
+	 * window overflow/underflow handler or fast exception handler hits
+	 * data breakpoint, in which case save and disable all data
+	 * breakpoints, single-step faulting instruction and restore data
+	 * breakpoints.
+	 */
+
+	bbci.l	a0, PS_UM_BIT, .Ldebug_exception_in_exception	# jump if kernel mode
+
+	rsr	a0, debugcause
+	bbsi.l	a0, DEBUGCAUSE_DBREAK_BIT, .Ldebug_save_dbreak
+
+	.set	_index, 0
+	.rept	XCHAL_NUM_DBREAK
+	l32i	a0, a3, DT_DBREAKC_SAVE + _index * 4
+	wsr	a0, SREG_DBREAKC + _index
+	.set	_index, _index + 1
+	.endr
+
+	l32i	a0, a3, DT_ICOUNT_LEVEL_SAVE
+	wsr	a0, icountlevel
+
+	l32i	a0, a3, DT_ICOUNT_SAVE
+	xsr	a0, icount
+
+	l32i	a0, a3, DT_DEBUG_SAVE
+	xsr	a3, SREG_EXCSAVE + XCHAL_DEBUGLEVEL
+	rfi	XCHAL_DEBUGLEVEL
+
+.Ldebug_save_dbreak:
+	.set	_index, 0
+	.rept	XCHAL_NUM_DBREAK
+	movi	a0, 0
+	xsr	a0, SREG_DBREAKC + _index
+	s32i	a0, a3, DT_DBREAKC_SAVE + _index * 4
+	.set	_index, _index + 1
+	.endr
+
+	movi	a0, XCHAL_EXCM_LEVEL + 1
+	xsr	a0, icountlevel
+	s32i	a0, a3, DT_ICOUNT_LEVEL_SAVE
+
+	movi	a0, 0xfffffffe
+	xsr	a0, icount
+	s32i	a0, a3, DT_ICOUNT_SAVE
+
+	l32i	a0, a3, DT_DEBUG_SAVE
+	xsr	a3, SREG_EXCSAVE + XCHAL_DEBUGLEVEL
+	rfi	XCHAL_DEBUGLEVEL
+#else
+	/* Debug exception while in exception mode. Should not happen. */
+	j	.Ldebug_exception_in_exception	// FIXME!!
+#endif
+
+ENDPROC(debug_exception)
+
+/*
+ * We get here in case of an unrecoverable exception.
+ * The only thing we can do is to be nice and print a panic message.
+ * We only produce a single stack frame for panic, so ???
+ *
+ *
+ * Entry conditions:
+ *
+ *   - a0 contains the caller address; original value saved in excsave1.
+ *   - the original a0 contains a valid return address (backtrace) or 0.
+ *   - a2 contains a valid stackpointer
+ *
+ * Notes:
+ *
+ *   - If the stack pointer could be invalid, the caller has to setup a
+ *     dummy stack pointer (e.g. the stack of the init_task)
+ *
+ *   - If the return address could be invalid, the caller has to set it
+ *     to 0, so the backtrace would stop.
+ *
+ */
+	.align 4
+unrecoverable_text:
+	.ascii "Unrecoverable error in exception handler\0"
+
+	.literal_position
+
+ENTRY(unrecoverable_exception)
+
+#if XCHAL_HAVE_WINDOWED
+	movi	a0, 1
+	movi	a1, 0
+
+	wsr	a0, windowstart
+	wsr	a1, windowbase
+	rsync
+#endif
+
+	movi	a1, KERNEL_PS_WOE_MASK | LOCKLEVEL
+	wsr	a1, ps
+	rsync
+
+	movi	a1, init_task
+	movi	a0, 0
+	addi	a1, a1, PT_REGS_OFFSET
+
+	movi	abi_arg0, unrecoverable_text
+	abi_call	panic
+
+1:	j	1b
+
+ENDPROC(unrecoverable_exception)
+
+/* -------------------------- FAST EXCEPTION HANDLERS ----------------------- */
+
+	__XTENSA_HANDLER
+	.literal_position
+
+#ifdef SUPPORT_WINDOWED
+/*
+ * Fast-handler for alloca exceptions
+ *
+ *  The ALLOCA handler is entered when user code executes the MOVSP
+ *  instruction and the caller's frame is not in the register file.
+ *
+ * This algorithm was taken from the Ross Morley's RTOS Porting Layer:
+ *
+ *    /home/ross/rtos/porting/XtensaRTOS-PortingLayer-20090507/xtensa_vectors.S
+ *
+ * It leverages the existing window spill/fill routines and their support for
+ * double exceptions. The 'movsp' instruction will only cause an exception if
+ * the next window needs to be loaded. In fact this ALLOCA exception may be
+ * replaced at some point by changing the hardware to do a underflow exception
+ * of the proper size instead.
+ *
+ * This algorithm simply backs out the register changes started by the user
+ * exception handler, makes it appear that we have started a window underflow
+ * by rotating the window back and then setting the old window base (OWB) in
+ * the 'ps' register with the rolled back window base. The 'movsp' instruction
+ * will be re-executed and this time since the next window frames is in the
+ * active AR registers it won't cause an exception.
+ *
+ * If the WindowUnderflow code gets a TLB miss the page will get mapped
+ * the partial WindowUnderflow will be handled in the double exception
+ * handler.
+ *
+ * Entry condition:
+ *
+ *   a0:	trashed, original value saved on stack (PT_AREG0)
+ *   a1:	a1
+ *   a2:	new stack pointer, original in DEPC
+ *   a3:	a3
+ *   depc:	a2, original value saved on stack (PT_DEPC)
+ *   excsave_1:	dispatch table
+ *
+ *   PT_DEPC >= VALID_DOUBLE_EXCEPTION_ADDRESS: double exception, DEPC
+ *	     <  VALID_DOUBLE_EXCEPTION_ADDRESS: regular exception
+ */
+
+ENTRY(fast_alloca)
+	rsr	a0, windowbase
+	rotw	-1
+	rsr	a2, ps
+	extui	a3, a2, PS_OWB_SHIFT, PS_OWB_WIDTH
+	xor	a3, a3, a4
+	l32i	a4, a6, PT_AREG0
+	l32i	a1, a6, PT_DEPC
+	rsr	a6, depc
+	wsr	a1, depc
+	slli	a3, a3, PS_OWB_SHIFT
+	xor	a2, a2, a3
+	wsr	a2, ps
+	rsync
+
+	_bbci.l	a4, 31, 4f
+	rotw	-1
+	_bbci.l	a8, 30, 8f
+	rotw	-1
+	j	_WindowUnderflow12
+8:	j	_WindowUnderflow8
+4:	j	_WindowUnderflow4
+ENDPROC(fast_alloca)
+#endif
+
+#ifdef CONFIG_USER_ABI_CALL0_PROBE
+/*
+ * fast illegal instruction handler.
+ *
+ * This is used to fix up user PS.WOE on the exception caused
+ * by the first opcode related to register window. If PS.WOE is
+ * already set it goes directly to the common user exception handler.
+ *
+ * Entry condition:
+ *
+ *   a0:	trashed, original value saved on stack (PT_AREG0)
+ *   a1:	a1
+ *   a2:	new stack pointer, original in DEPC
+ *   a3:	a3
+ *   depc:	a2, original value saved on stack (PT_DEPC)
+ *   excsave_1:	dispatch table
+ */
+
+ENTRY(fast_illegal_instruction_user)
+
+	rsr	a0, ps
+	bbsi.l	a0, PS_WOE_BIT, 1f
+	s32i	a3, a2, PT_AREG3
+	movi	a3, PS_WOE_MASK
+	or	a0, a0, a3
+	wsr	a0, ps
+#ifdef CONFIG_USER_ABI_CALL0_PROBE
+	GET_THREAD_INFO(a3, a2)
+	rsr	a0, epc1
+	s32i	a0, a3, TI_PS_WOE_FIX_ADDR
+#endif
+	l32i	a3, a2, PT_AREG3
+	l32i	a0, a2, PT_AREG0
+	rsr	a2, depc
+	rfe
+1:
+	call0	user_exception
+
+ENDPROC(fast_illegal_instruction_user)
+#endif
+
+	/*
+ * fast system calls.
+ *
+ * WARNING:  The kernel doesn't save the entire user context before
+ * handling a fast system call.  These functions are small and short,
+ * usually offering some functionality not available to user tasks.
+ *
+ * BE CAREFUL TO PRESERVE THE USER'S CONTEXT.
+ *
+ * Entry condition:
+ *
+ *   a0:	trashed, original value saved on stack (PT_AREG0)
+ *   a1:	a1
+ *   a2:	new stack pointer, original in DEPC
+ *   a3:	a3
+ *   depc:	a2, original value saved on stack (PT_DEPC)
+ *   excsave_1:	dispatch table
+ */
+
+ENTRY(fast_syscall_user)
+
+	/* Skip syscall. */
+
+	rsr	a0, epc1
+	addi	a0, a0, 3
+	wsr	a0, epc1
+
+	l32i	a0, a2, PT_DEPC
+	bgeui	a0, VALID_DOUBLE_EXCEPTION_ADDRESS, fast_syscall_unrecoverable
+
+	rsr	a0, depc			# get syscall-nr
+	_beqz	a0, fast_syscall_spill_registers
+	_beqi	a0, __NR_xtensa, fast_syscall_xtensa
+
+	call0	user_exception
+
+ENDPROC(fast_syscall_user)
+
+ENTRY(fast_syscall_unrecoverable)
+
+	/* Restore all states. */
+
+	l32i    a0, a2, PT_AREG0        # restore a0
+	xsr     a2, depc                # restore a2, depc
+
+	wsr     a0, excsave1
+	call0	unrecoverable_exception
+
+ENDPROC(fast_syscall_unrecoverable)
+
+/*
+ * sysxtensa syscall handler
+ *
+ * int sysxtensa (SYS_XTENSA_ATOMIC_SET,     ptr, val,    unused);
+ * int sysxtensa (SYS_XTENSA_ATOMIC_ADD,     ptr, val,    unused);
+ * int sysxtensa (SYS_XTENSA_ATOMIC_EXG_ADD, ptr, val,    unused);
+ * int sysxtensa (SYS_XTENSA_ATOMIC_CMP_SWP, ptr, oldval, newval);
+ *        a2            a6                   a3    a4      a5
+ *
+ * Entry condition:
+ *
+ *   a0:	a2 (syscall-nr), original value saved on stack (PT_AREG0)
+ *   a1:	a1
+ *   a2:	new stack pointer, original in a0 and DEPC
+ *   a3:	a3
+ *   a4..a15:	unchanged
+ *   depc:	a2, original value saved on stack (PT_DEPC)
+ *   excsave_1:	dispatch table
+ *
+ *   PT_DEPC >= VALID_DOUBLE_EXCEPTION_ADDRESS: double exception, DEPC
+ *	     <  VALID_DOUBLE_EXCEPTION_ADDRESS: regular exception
+ *
+ * Note: we don't have to save a2; a2 holds the return value
+ */
+
+	.literal_position
+
+#ifdef CONFIG_FAST_SYSCALL_XTENSA
+
+ENTRY(fast_syscall_xtensa)
+
+	s32i	a7, a2, PT_AREG7	# we need an additional register
+	movi	a7, 4			# sizeof(unsigned int)
+	access_ok a3, a7, a0, a2, .Leac	# a0: scratch reg, a2: sp
+
+	_bgeui	a6, SYS_XTENSA_COUNT, .Lill
+	_bnei	a6, SYS_XTENSA_ATOMIC_CMP_SWP, .Lnswp
+
+	/* Fall through for ATOMIC_CMP_SWP. */
+
+.Lswp:	/* Atomic compare and swap */
+
+EX(.Leac) l32i	a0, a3, 0		# read old value
+	bne	a0, a4, 1f		# same as old value? jump
+EX(.Leac) s32i	a5, a3, 0		# different, modify value
+	l32i	a7, a2, PT_AREG7	# restore a7
+	l32i	a0, a2, PT_AREG0	# restore a0
+	movi	a2, 1			# and return 1
+	rfe
+
+1:	l32i	a7, a2, PT_AREG7	# restore a7
+	l32i	a0, a2, PT_AREG0	# restore a0
+	movi	a2, 0			# return 0 (note that we cannot set
+	rfe
+
+.Lnswp:	/* Atomic set, add, and exg_add. */
+
+EX(.Leac) l32i	a7, a3, 0		# orig
+	addi	a6, a6, -SYS_XTENSA_ATOMIC_SET
+	add	a0, a4, a7		# + arg
+	moveqz	a0, a4, a6		# set
+	addi	a6, a6, SYS_XTENSA_ATOMIC_SET
+EX(.Leac) s32i	a0, a3, 0		# write new value
+
+	mov	a0, a2
+	mov	a2, a7
+	l32i	a7, a0, PT_AREG7	# restore a7
+	l32i	a0, a0, PT_AREG0	# restore a0
+	rfe
+
+.Leac:	l32i	a7, a2, PT_AREG7	# restore a7
+	l32i	a0, a2, PT_AREG0	# restore a0
+	movi	a2, -EFAULT
+	rfe
+
+.Lill:	l32i	a7, a2, PT_AREG7	# restore a7
+	l32i	a0, a2, PT_AREG0	# restore a0
+	movi	a2, -EINVAL
+	rfe
+
+ENDPROC(fast_syscall_xtensa)
+
+#else /* CONFIG_FAST_SYSCALL_XTENSA */
+
+ENTRY(fast_syscall_xtensa)
+
+	l32i    a0, a2, PT_AREG0        # restore a0
+	movi	a2, -ENOSYS
+	rfe
+
+ENDPROC(fast_syscall_xtensa)
+
+#endif /* CONFIG_FAST_SYSCALL_XTENSA */
+
+
+/* fast_syscall_spill_registers.
+ *
+ * Entry condition:
+ *
+ *   a0:	trashed, original value saved on stack (PT_AREG0)
+ *   a1:	a1
+ *   a2:	new stack pointer, original in DEPC
+ *   a3:	a3
+ *   depc:	a2, original value saved on stack (PT_DEPC)
+ *   excsave_1:	dispatch table
+ *
+ * Note: We assume the stack pointer is EXC_TABLE_KSTK in the fixup handler.
+ */
+
+#if defined(CONFIG_FAST_SYSCALL_SPILL_REGISTERS) && \
+		defined(USER_SUPPORT_WINDOWED)
+
+ENTRY(fast_syscall_spill_registers)
+
+	/* Register a FIXUP handler (pass current wb as a parameter) */
+
+	xsr	a3, excsave1
+	movi	a0, fast_syscall_spill_registers_fixup
+	s32i	a0, a3, EXC_TABLE_FIXUP
+	rsr	a0, windowbase
+	s32i	a0, a3, EXC_TABLE_PARAM
+	xsr	a3, excsave1		# restore a3 and excsave_1
+
+	/* Save a3, a4 and SAR on stack. */
+
+	rsr	a0, sar
+	s32i	a3, a2, PT_AREG3
+	s32i	a0, a2, PT_SAR
+
+	/* The spill routine might clobber a4, a7, a8, a11, a12, and a15. */
+
+	s32i	a4, a2, PT_AREG4
+	s32i	a7, a2, PT_AREG7
+	s32i	a8, a2, PT_AREG8
+	s32i	a11, a2, PT_AREG11
+	s32i	a12, a2, PT_AREG12
+	s32i	a15, a2, PT_AREG15
+
+	/*
+	 * Rotate ws so that the current windowbase is at bit 0.
+	 * Assume ws = xxxwww1yy (www1 current window frame).
+	 * Rotate ws right so that a4 = yyxxxwww1.
+	 */
+
+	rsr	a0, windowbase
+	rsr	a3, windowstart		# a3 = xxxwww1yy
+	ssr	a0			# holds WB
+	slli	a0, a3, WSBITS
+	or	a3, a3, a0		# a3 = xxxwww1yyxxxwww1yy
+	srl	a3, a3			# a3 = 00xxxwww1yyxxxwww1
+
+	/* We are done if there are no more than the current register frame. */
+
+	extui	a3, a3, 1, WSBITS-1	# a3 = 0yyxxxwww
+	movi	a0, (1 << (WSBITS-1))
+	_beqz	a3, .Lnospill		# only one active frame? jump
+
+	/* We want 1 at the top, so that we return to the current windowbase */
+
+	or	a3, a3, a0		# 1yyxxxwww
+
+	/* Skip empty frames - get 'oldest' WINDOWSTART-bit. */
+
+	wsr	a3, windowstart		# save shifted windowstart
+	neg	a0, a3
+	and	a3, a0, a3		# first bit set from right: 000010000
+
+	ffs_ws	a0, a3			# a0: shifts to skip empty frames
+	movi	a3, WSBITS
+	sub	a0, a3, a0		# WSBITS-a0:number of 0-bits from right
+	ssr	a0			# save in SAR for later.
+
+	rsr	a3, windowbase
+	add	a3, a3, a0
+	wsr	a3, windowbase
+	rsync
+
+	rsr	a3, windowstart
+	srl	a3, a3			# shift windowstart
+
+	/* WB is now just one frame below the oldest frame in the register
+	   window. WS is shifted so the oldest frame is in bit 0, thus, WB
+	   and WS differ by one 4-register frame. */
+
+	/* Save frames. Depending what call was used (call4, call8, call12),
+	 * we have to save 4,8. or 12 registers.
+	 */
+
+
+.Lloop: _bbsi.l	a3, 1, .Lc4
+	_bbci.l	a3, 2, .Lc12
+
+.Lc8:	s32e	a4, a13, -16
+	l32e	a4, a5, -12
+	s32e	a8, a4, -32
+	s32e	a5, a13, -12
+	s32e	a6, a13, -8
+	s32e	a7, a13, -4
+	s32e	a9, a4, -28
+	s32e	a10, a4, -24
+	s32e	a11, a4, -20
+	srli	a11, a3, 2		# shift windowbase by 2
+	rotw	2
+	_bnei	a3, 1, .Lloop
+	j	.Lexit
+
+.Lc4:	s32e	a4, a9, -16
+	s32e	a5, a9, -12
+	s32e	a6, a9, -8
+	s32e	a7, a9, -4
+
+	srli	a7, a3, 1
+	rotw	1
+	_bnei	a3, 1, .Lloop
+	j	.Lexit
+
+.Lc12:	_bbci.l	a3, 3, .Linvalid_mask	# bit 2 shouldn't be zero!
+
+	/* 12-register frame (call12) */
+
+	l32e	a0, a5, -12
+	s32e	a8, a0, -48
+	mov	a8, a0
+
+	s32e	a9, a8, -44
+	s32e	a10, a8, -40
+	s32e	a11, a8, -36
+	s32e	a12, a8, -32
+	s32e	a13, a8, -28
+	s32e	a14, a8, -24
+	s32e	a15, a8, -20
+	srli	a15, a3, 3
+
+	/* The stack pointer for a4..a7 is out of reach, so we rotate the
+	 * window, grab the stackpointer, and rotate back.
+	 * Alternatively, we could also use the following approach, but that
+	 * makes the fixup routine much more complicated:
+	 * rotw	1
+	 * s32e	a0, a13, -16
+	 * ...
+	 * rotw 2
+	 */
+
+	rotw	1
+	mov	a4, a13
+	rotw	-1
+
+	s32e	a4, a8, -16
+	s32e	a5, a8, -12
+	s32e	a6, a8, -8
+	s32e	a7, a8, -4
+
+	rotw	3
+
+	_beqi	a3, 1, .Lexit
+	j	.Lloop
+
+.Lexit:
+
+	/* Done. Do the final rotation and set WS */
+
+	rotw	1
+	rsr	a3, windowbase
+	ssl	a3
+	movi	a3, 1
+	sll	a3, a3
+	wsr	a3, windowstart
+.Lnospill:
+
+	/* Advance PC, restore registers and SAR, and return from exception. */
+
+	l32i	a3, a2, PT_SAR
+	l32i	a0, a2, PT_AREG0
+	wsr	a3, sar
+	l32i	a3, a2, PT_AREG3
+
+	/* Restore clobbered registers. */
+
+	l32i	a4, a2, PT_AREG4
+	l32i	a7, a2, PT_AREG7
+	l32i	a8, a2, PT_AREG8
+	l32i	a11, a2, PT_AREG11
+	l32i	a12, a2, PT_AREG12
+	l32i	a15, a2, PT_AREG15
+
+	movi	a2, 0
+	rfe
+
+.Linvalid_mask:
+
+	/* We get here because of an unrecoverable error in the window
+	 * registers, so set up a dummy frame and kill the user application.
+	 * Note: We assume EXC_TABLE_KSTK contains a valid stack pointer.
+	 */
+
+	movi	a0, 1
+	movi	a1, 0
+
+	wsr	a0, windowstart
+	wsr	a1, windowbase
+	rsync
+
+	movi	a0, 0
+
+	rsr	a3, excsave1
+	l32i	a1, a3, EXC_TABLE_KSTK
+
+	movi	a4, KERNEL_PS_WOE_MASK | LOCKLEVEL
+	wsr	a4, ps
+	rsync
+
+	movi	abi_arg0, SIGSEGV
+	abi_call	make_task_dead
+
+	/* shouldn't return, so panic */
+
+	wsr	a0, excsave1
+	call0	unrecoverable_exception		# should not return
+1:	j	1b
+
+
+ENDPROC(fast_syscall_spill_registers)
+
+/* Fixup handler.
+ *
+ * We get here if the spill routine causes an exception, e.g. tlb miss.
+ * We basically restore WINDOWBASE and WINDOWSTART to the condition when
+ * we entered the spill routine and jump to the user exception handler.
+ *
+ * Note that we only need to restore the bits in windowstart that have not
+ * been spilled yet by the _spill_register routine. Luckily, a3 contains a
+ * rotated windowstart with only those bits set for frames that haven't been
+ * spilled yet. Because a3 is rotated such that bit 0 represents the register
+ * frame for the current windowbase - 1, we need to rotate a3 left by the
+ * value of the current windowbase + 1 and move it to windowstart.
+ *
+ * a0: value of depc, original value in depc
+ * a2: trashed, original value in EXC_TABLE_DOUBLE_SAVE
+ * a3: exctable, original value in excsave1
+ */
+
+ENTRY(fast_syscall_spill_registers_fixup)
+
+	rsr	a2, windowbase	# get current windowbase (a2 is saved)
+	xsr	a0, depc	# restore depc and a0
+	ssl	a2		# set shift (32 - WB)
+
+	/* We need to make sure the current registers (a0-a3) are preserved.
+	 * To do this, we simply set the bit for the current window frame
+	 * in WS, so that the exception handlers save them to the task stack.
+	 *
+	 * Note: we use a3 to set the windowbase, so we take a special care
+	 * of it, saving it in the original _spill_registers frame across
+	 * the exception handler call.
+	 */
+
+	xsr	a3, excsave1	# get spill-mask
+	slli	a3, a3, 1	# shift left by one
+	addi	a3, a3, 1	# set the bit for the current window frame
+
+	slli	a2, a3, 32-WSBITS
+	src	a2, a3, a2	# a2 = xxwww1yyxxxwww1yy......
+	wsr	a2, windowstart	# set corrected windowstart
+
+	srli	a3, a3, 1
+	rsr	a2, excsave1
+	l32i	a2, a2, EXC_TABLE_DOUBLE_SAVE	# restore a2
+	xsr	a2, excsave1
+	s32i	a3, a2, EXC_TABLE_DOUBLE_SAVE	# save a3
+	l32i	a3, a2, EXC_TABLE_PARAM	# original WB (in user task)
+	xsr	a2, excsave1
+
+	/* Return to the original (user task) WINDOWBASE.
+	 * We leave the following frame behind:
+	 * a0, a1, a2	same
+	 * a3:		trashed (saved in EXC_TABLE_DOUBLE_SAVE)
+	 * depc:	depc (we have to return to that address)
+	 * excsave_1:	exctable
+	 */
+
+	wsr	a3, windowbase
+	rsync
+
+	/* We are now in the original frame when we entered _spill_registers:
+	 *  a0: return address
+	 *  a1: used, stack pointer
+	 *  a2: kernel stack pointer
+	 *  a3: available
+	 *  depc: exception address
+	 *  excsave: exctable
+	 * Note: This frame might be the same as above.
+	 */
+
+	/* Setup stack pointer. */
+
+	addi	a2, a2, -PT_USER_SIZE
+	s32i	a0, a2, PT_AREG0
+
+	/* Make sure we return to this fixup handler. */
+
+	movi	a3, fast_syscall_spill_registers_fixup_return
+	s32i	a3, a2, PT_DEPC		# setup depc
+
+	/* Jump to the exception handler. */
+
+	rsr	a3, excsave1
+	rsr	a0, exccause
+	addx4	a0, a0, a3              	# find entry in table
+	l32i	a0, a0, EXC_TABLE_FAST_USER     # load handler
+	l32i	a3, a3, EXC_TABLE_DOUBLE_SAVE
+	jx	a0
+
+ENDPROC(fast_syscall_spill_registers_fixup)
+
+ENTRY(fast_syscall_spill_registers_fixup_return)
+
+	/* When we return here, all registers have been restored (a2: DEPC) */
+
+	wsr	a2, depc		# exception address
+
+	/* Restore fixup handler. */
+
+	rsr	a2, excsave1
+	s32i	a3, a2, EXC_TABLE_DOUBLE_SAVE
+	movi	a3, fast_syscall_spill_registers_fixup
+	s32i	a3, a2, EXC_TABLE_FIXUP
+	rsr	a3, windowbase
+	s32i	a3, a2, EXC_TABLE_PARAM
+	l32i	a2, a2, EXC_TABLE_KSTK
+
+	/* Load WB at the time the exception occurred. */
+
+	rsr	a3, sar			# WB is still in SAR
+	neg	a3, a3
+	wsr	a3, windowbase
+	rsync
+
+	rsr	a3, excsave1
+	l32i	a3, a3, EXC_TABLE_DOUBLE_SAVE
+
+	rfde
+
+ENDPROC(fast_syscall_spill_registers_fixup_return)
+
+#else /* CONFIG_FAST_SYSCALL_SPILL_REGISTERS */
+
+ENTRY(fast_syscall_spill_registers)
+
+	l32i    a0, a2, PT_AREG0        # restore a0
+	movi	a2, -ENOSYS
+	rfe
+
+ENDPROC(fast_syscall_spill_registers)
+
+#endif /* CONFIG_FAST_SYSCALL_SPILL_REGISTERS */
+
+#ifdef CONFIG_MMU
+/*
+ * We should never get here. Bail out!
+ */
+
+ENTRY(fast_second_level_miss_double_kernel)
+
+1:
+	call0	unrecoverable_exception		# should not return
+1:	j	1b
+
+ENDPROC(fast_second_level_miss_double_kernel)
+
+/* First-level entry handler for user, kernel, and double 2nd-level
+ * TLB miss exceptions.  Note that for now, user and kernel miss
+ * exceptions share the same entry point and are handled identically.
+ *
+ * An old, less-efficient C version of this function used to exist.
+ * We include it below, interleaved as comments, for reference.
+ *
+ * Entry condition:
+ *
+ *   a0:	trashed, original value saved on stack (PT_AREG0)
+ *   a1:	a1
+ *   a2:	new stack pointer, original in DEPC
+ *   a3:	a3
+ *   depc:	a2, original value saved on stack (PT_DEPC)
+ *   excsave_1:	dispatch table
+ *
+ *   PT_DEPC >= VALID_DOUBLE_EXCEPTION_ADDRESS: double exception, DEPC
+ *	     <  VALID_DOUBLE_EXCEPTION_ADDRESS: regular exception
+ */
+
+ENTRY(fast_second_level_miss)
+
+	/* Save a1 and a3. Note: we don't expect a double exception. */
+
+	s32i	a1, a2, PT_AREG1
+	s32i	a3, a2, PT_AREG3
+
+	/* We need to map the page of PTEs for the user task.  Find
+	 * the pointer to that page.  Also, it's possible for tsk->mm
+	 * to be NULL while tsk->active_mm is nonzero if we faulted on
+	 * a vmalloc address.  In that rare case, we must use
+	 * active_mm instead to avoid a fault in this handler.  See
+	 *
+	 * http://mail.nl.linux.org/linux-mm/2002-08/msg00258.html
+	 *   (or search Internet on "mm vs. active_mm")
+	 *
+	 *	if (!mm)
+	 *		mm = tsk->active_mm;
+	 *	pgd = pgd_offset (mm, regs->excvaddr);
+	 *	pmd = pmd_offset (pgd, regs->excvaddr);
+	 *	pmdval = *pmd;
+	 */
+
+	GET_CURRENT(a1,a2)
+	l32i	a0, a1, TASK_MM		# tsk->mm
+	beqz	a0, .Lfast_second_level_miss_no_mm
+
+.Lfast_second_level_miss_continue:
+	rsr	a3, excvaddr		# fault address
+	_PGD_OFFSET(a0, a3, a1)
+	l32i	a0, a0, 0		# read pmdval
+	beqz	a0, .Lfast_second_level_miss_no_pmd
+
+	/* Read ptevaddr and convert to top of page-table page.
+	 *
+	 * 	vpnval = read_ptevaddr_register() & PAGE_MASK;
+	 * 	vpnval += DTLB_WAY_PGTABLE;
+	 *	pteval = mk_pte (virt_to_page(pmd_val(pmdval)), PAGE_KERNEL);
+	 *	write_dtlb_entry (pteval, vpnval);
+	 *
+	 * The messy computation for 'pteval' above really simplifies
+	 * into the following:
+	 *
+	 * pteval = ((pmdval - PAGE_OFFSET + PHYS_OFFSET) & PAGE_MASK)
+	 *                 | PAGE_DIRECTORY
+	 */
+
+	movi	a1, (PHYS_OFFSET - PAGE_OFFSET) & 0xffffffff
+	add	a0, a0, a1		# pmdval - PAGE_OFFSET
+	extui	a1, a0, 0, PAGE_SHIFT	# ... & PAGE_MASK
+	xor	a0, a0, a1
+
+	movi	a1, _PAGE_DIRECTORY
+	or	a0, a0, a1		# ... | PAGE_DIRECTORY
+
+	/*
+	 * We utilize all three wired-ways (7-9) to hold pmd translations.
+	 * Memory regions are mapped to the DTLBs according to bits 28 and 29.
+	 * This allows to map the three most common regions to three different
+	 * DTLBs:
+	 *  0,1 -> way 7	program (0040.0000) and virtual (c000.0000)
+	 *  2   -> way 8	shared libaries (2000.0000)
+	 *  3   -> way 0	stack (3000.0000)
+	 */
+
+	extui	a3, a3, 28, 2		# addr. bit 28 and 29	0,1,2,3
+	rsr	a1, ptevaddr
+	addx2	a3, a3, a3		# ->			0,3,6,9
+	srli	a1, a1, PAGE_SHIFT
+	extui	a3, a3, 2, 2		# ->			0,0,1,2
+	slli	a1, a1, PAGE_SHIFT	# ptevaddr & PAGE_MASK
+	addi	a3, a3, DTLB_WAY_PGD
+	add	a1, a1, a3		# ... + way_number
+
+.Lfast_second_level_miss_wdtlb:
+	wdtlb	a0, a1
+	dsync
+
+	/* Exit critical section. */
+.Lfast_second_level_miss_skip_wdtlb:
+	rsr	a3, excsave1
+	movi	a0, 0
+	s32i	a0, a3, EXC_TABLE_FIXUP
+
+	/* Restore the working registers, and return. */
+
+	l32i	a0, a2, PT_AREG0
+	l32i	a1, a2, PT_AREG1
+	l32i	a3, a2, PT_AREG3
+	l32i	a2, a2, PT_DEPC
+
+	bgeui	a2, VALID_DOUBLE_EXCEPTION_ADDRESS, 1f
+
+	/* Restore excsave1 and return. */
+
+	rsr	a2, depc
+	rfe
+
+	/* Return from double exception. */
+
+1:	xsr	a2, depc
+	esync
+	rfde
+
+.Lfast_second_level_miss_no_mm:
+	l32i	a0, a1, TASK_ACTIVE_MM	# unlikely case mm == 0
+	bnez	a0, .Lfast_second_level_miss_continue
+
+	/* Even more unlikely case active_mm == 0.
+	 * We can get here with NMI in the middle of context_switch that
+	 * touches vmalloc area.
+	 */
+	movi	a0, init_mm
+	j	.Lfast_second_level_miss_continue
+
+.Lfast_second_level_miss_no_pmd:
+#if (DCACHE_WAY_SIZE > PAGE_SIZE)
+
+	/* Special case for cache aliasing.
+	 * We (should) only get here if a clear_user_page, copy_user_page
+	 * or the aliased cache flush functions got preemptively interrupted 
+	 * by another task. Re-establish temporary mapping to the 
+	 * TLBTEMP_BASE areas.
+	 */
+
+	/* We shouldn't be in a double exception */
+
+	l32i	a0, a2, PT_DEPC
+	bgeui	a0, VALID_DOUBLE_EXCEPTION_ADDRESS, .Lfast_second_level_miss_slow
+
+	/* Make sure the exception originated in the special functions */
+
+	movi	a0, __tlbtemp_mapping_start
+	rsr	a3, epc1
+	bltu	a3, a0, .Lfast_second_level_miss_slow
+	movi	a0, __tlbtemp_mapping_end
+	bgeu	a3, a0, .Lfast_second_level_miss_slow
+
+	/* Check if excvaddr was in one of the TLBTEMP_BASE areas. */
+
+	movi	a3, TLBTEMP_BASE_1
+	rsr	a0, excvaddr
+	bltu	a0, a3, .Lfast_second_level_miss_slow
+
+	addi	a1, a0, -TLBTEMP_SIZE
+	bgeu	a1, a3, .Lfast_second_level_miss_slow
+
+	/* Check if we have to restore an ITLB mapping. */
+
+	movi	a1, __tlbtemp_mapping_itlb
+	rsr	a3, epc1
+	sub	a3, a3, a1
+
+	/* Calculate VPN */
+
+	movi	a1, PAGE_MASK
+	and	a1, a1, a0
+
+	/* Jump for ITLB entry */
+
+	bgez	a3, 1f
+
+	/* We can use up to two TLBTEMP areas, one for src and one for dst. */
+
+	extui	a3, a0, PAGE_SHIFT + DCACHE_ALIAS_ORDER, 1
+	add	a1, a3, a1
+
+	/* PPN is in a6 for the first TLBTEMP area and in a7 for the second. */
+
+	mov	a0, a6
+	movnez	a0, a7, a3
+	j	.Lfast_second_level_miss_wdtlb
+
+	/* ITLB entry. We only use dst in a6. */
+
+1:	witlb	a6, a1
+	isync
+	j	.Lfast_second_level_miss_skip_wdtlb
+
+
+#endif	// DCACHE_WAY_SIZE > PAGE_SIZE
+
+	/* Invalid PGD, default exception handling */
+.Lfast_second_level_miss_slow:
+
+	rsr	a1, depc
+	s32i	a1, a2, PT_AREG2
+	mov	a1, a2
+
+	rsr	a2, ps
+	bbsi.l	a2, PS_UM_BIT, 1f
+	call0	_kernel_exception
+1:	call0	_user_exception
+
+ENDPROC(fast_second_level_miss)
+
+/*
+ * StoreProhibitedException
+ *
+ * Update the pte and invalidate the itlb mapping for this pte.
+ *
+ * Entry condition:
+ *
+ *   a0:	trashed, original value saved on stack (PT_AREG0)
+ *   a1:	a1
+ *   a2:	new stack pointer, original in DEPC
+ *   a3:	a3
+ *   depc:	a2, original value saved on stack (PT_DEPC)
+ *   excsave_1:	dispatch table
+ *
+ *   PT_DEPC >= VALID_DOUBLE_EXCEPTION_ADDRESS: double exception, DEPC
+ *	     <  VALID_DOUBLE_EXCEPTION_ADDRESS: regular exception
+ */
+
+ENTRY(fast_store_prohibited)
+
+	/* Save a1 and a3. */
+
+	s32i	a1, a2, PT_AREG1
+	s32i	a3, a2, PT_AREG3
+
+	GET_CURRENT(a1,a2)
+	l32i	a0, a1, TASK_MM		# tsk->mm
+	beqz	a0, .Lfast_store_no_mm
+
+.Lfast_store_continue:
+	rsr	a1, excvaddr		# fault address
+	_PGD_OFFSET(a0, a1, a3)
+	l32i	a0, a0, 0
+	beqz	a0, .Lfast_store_slow
+
+	/*
+	 * Note that we test _PAGE_WRITABLE_BIT only if PTE is present
+	 * and is not PAGE_NONE. See pgtable.h for possible PTE layouts.
+	 */
+
+	_PTE_OFFSET(a0, a1, a3)
+	l32i	a3, a0, 0		# read pteval
+	movi	a1, _PAGE_CA_INVALID
+	ball	a3, a1, .Lfast_store_slow
+	bbci.l	a3, _PAGE_WRITABLE_BIT, .Lfast_store_slow
+
+	movi	a1, _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_HW_WRITE
+	or	a3, a3, a1
+	rsr	a1, excvaddr
+	s32i	a3, a0, 0
+
+	/* We need to flush the cache if we have page coloring. */
+#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK
+	dhwb	a0, 0
+#endif
+	pdtlb	a0, a1
+	wdtlb	a3, a0
+
+	/* Exit critical section. */
+
+	movi	a0, 0
+	rsr	a3, excsave1
+	s32i	a0, a3, EXC_TABLE_FIXUP
+
+	/* Restore the working registers, and return. */
+
+	l32i	a3, a2, PT_AREG3
+	l32i	a1, a2, PT_AREG1
+	l32i	a0, a2, PT_AREG0
+	l32i	a2, a2, PT_DEPC
+
+	bgeui	a2, VALID_DOUBLE_EXCEPTION_ADDRESS, 1f
+	rsr	a2, depc
+	rfe
+
+	/* Double exception. Restore FIXUP handler and return. */
+
+1:	xsr	a2, depc
+	esync
+	rfde
+
+.Lfast_store_no_mm:
+	l32i	a0, a1, TASK_ACTIVE_MM	# unlikely case mm == 0
+	j	.Lfast_store_continue
+
+	/* If there was a problem, handle fault in C */
+.Lfast_store_slow:
+	rsr	a1, excvaddr
+	pdtlb	a0, a1
+	bbci.l	a0, DTLB_HIT_BIT, 1f
+	idtlb	a0
+1:
+	rsr	a3, depc	# still holds a2
+	s32i	a3, a2, PT_AREG2
+	mov	a1, a2
+
+	rsr	a2, ps
+	bbsi.l	a2, PS_UM_BIT, 1f
+	call0	_kernel_exception
+1:	call0	_user_exception
+
+ENDPROC(fast_store_prohibited)
+
+#endif /* CONFIG_MMU */
+
+	.text
+/*
+ * System Calls.
+ *
+ * void system_call (struct pt_regs* regs, int exccause)
+ *                            a2                 a3
+ */
+	.literal_position
+
+ENTRY(system_call)
+
+#if defined(__XTENSA_WINDOWED_ABI__)
+	abi_entry_default
+#elif defined(__XTENSA_CALL0_ABI__)
+	abi_entry(12)
+
+	s32i	a0, sp, 0
+	s32i	abi_saved0, sp, 4
+	s32i	abi_saved1, sp, 8
+	mov	abi_saved0, a2
+#else
+#error Unsupported Xtensa ABI
+#endif
+
+	/* regs->syscall = regs->areg[2] */
+
+	l32i	a7, abi_saved0, PT_AREG2
+	s32i	a7, abi_saved0, PT_SYSCALL
+
+	GET_THREAD_INFO(a4, a1)
+	l32i	abi_saved1, a4, TI_FLAGS
+	movi	a4, _TIF_WORK_MASK
+	and	abi_saved1, abi_saved1, a4
+	beqz	abi_saved1, 1f
+
+	mov	abi_arg0, abi_saved0
+	abi_call	do_syscall_trace_enter
+	beqz	abi_rv, .Lsyscall_exit
+	l32i	a7, abi_saved0, PT_SYSCALL
+
+1:
+	/* syscall = sys_call_table[syscall_nr] */
+
+	movi	a4, sys_call_table
+	movi	a5, __NR_syscalls
+	movi	abi_rv, -ENOSYS
+	bgeu	a7, a5, 1f
+
+	addx4	a4, a7, a4
+	l32i	abi_tmp0, a4, 0
+
+	/* Load args: arg0 - arg5 are passed via regs. */
+
+	l32i	abi_arg0, abi_saved0, PT_AREG6
+	l32i	abi_arg1, abi_saved0, PT_AREG3
+	l32i	abi_arg2, abi_saved0, PT_AREG4
+	l32i	abi_arg3, abi_saved0, PT_AREG5
+	l32i	abi_arg4, abi_saved0, PT_AREG8
+	l32i	abi_arg5, abi_saved0, PT_AREG9
+
+	abi_callx	abi_tmp0
+
+1:	/* regs->areg[2] = return_value */
+
+	s32i	abi_rv, abi_saved0, PT_AREG2
+	bnez	abi_saved1, 1f
+.Lsyscall_exit:
+#if defined(__XTENSA_WINDOWED_ABI__)
+	abi_ret_default
+#elif defined(__XTENSA_CALL0_ABI__)
+	l32i	a0, sp, 0
+	l32i	abi_saved0, sp, 4
+	l32i	abi_saved1, sp, 8
+	abi_ret(12)
+#else
+#error Unsupported Xtensa ABI
+#endif
+
+1:
+	mov	abi_arg0, abi_saved0
+	abi_call	do_syscall_trace_leave
+	j	.Lsyscall_exit
+
+ENDPROC(system_call)
+
+/*
+ * Spill live registers on the kernel stack macro.
+ *
+ * Entry condition: ps.woe is set, ps.excm is cleared
+ * Exit condition: windowstart has single bit set
+ * May clobber: a12, a13
+ */
+	.macro	spill_registers_kernel
+
+#if XCHAL_NUM_AREGS > 16
+	call12	1f
+	_j	2f
+	retw
+	.align	4
+1:
+	_entry	a1, 48
+	addi	a12, a0, 3
+#if XCHAL_NUM_AREGS > 32
+	.rept	(XCHAL_NUM_AREGS - 32) / 12
+	_entry	a1, 48
+	mov	a12, a0
+	.endr
+#endif
+	_entry	a1, 16
+#if XCHAL_NUM_AREGS % 12 == 0
+	mov	a8, a8
+#elif XCHAL_NUM_AREGS % 12 == 4
+	mov	a12, a12
+#elif XCHAL_NUM_AREGS % 12 == 8
+	mov	a4, a4
+#endif
+	retw
+2:
+#else
+	mov	a12, a12
+#endif
+	.endm
+
+/*
+ * Task switch.
+ *
+ * struct task*  _switch_to (struct task* prev, struct task* next)
+ *         a2                              a2                 a3
+ */
+
+ENTRY(_switch_to)
+
+#if defined(__XTENSA_WINDOWED_ABI__)
+	abi_entry(XTENSA_SPILL_STACK_RESERVE)
+#elif defined(__XTENSA_CALL0_ABI__)
+	abi_entry(16)
+
+	s32i	a12, sp, 0
+	s32i	a13, sp, 4
+	s32i	a14, sp, 8
+	s32i	a15, sp, 12
+#else
+#error Unsupported Xtensa ABI
+#endif
+	mov	a11, a3			# and 'next' (a3)
+
+	l32i	a4, a2, TASK_THREAD_INFO
+	l32i	a5, a3, TASK_THREAD_INFO
+
+	save_xtregs_user a4 a6 a8 a9 a12 a13 THREAD_XTREGS_USER
+
+#if THREAD_RA > 1020 || THREAD_SP > 1020
+	addi	a10, a2, TASK_THREAD
+	s32i	a0, a10, THREAD_RA - TASK_THREAD	# save return address
+	s32i	a1, a10, THREAD_SP - TASK_THREAD	# save stack pointer
+#else
+	s32i	a0, a2, THREAD_RA	# save return address
+	s32i	a1, a2, THREAD_SP	# save stack pointer
+#endif
+
+#if defined(CONFIG_STACKPROTECTOR) && !defined(CONFIG_SMP)
+	movi	a6, __stack_chk_guard
+	l32i	a8, a3, TASK_STACK_CANARY
+	s32i	a8, a6, 0
+#endif
+
+	/* Disable ints while we manipulate the stack pointer. */
+
+	irq_save a14, a3
+	rsync
+
+	/* Switch CPENABLE */
+
+#if (XTENSA_HAVE_COPROCESSORS || XTENSA_HAVE_IO_PORTS)
+	l32i	a3, a5, THREAD_CPENABLE
+#ifdef CONFIG_SMP
+	beqz	a3, 1f
+	memw			# pairs with memw (2) in fast_coprocessor
+	l32i	a6, a5, THREAD_CP_OWNER_CPU
+	l32i	a7, a5, THREAD_CPU
+	beq	a6, a7, 1f	# load 0 into CPENABLE if current CPU is not the owner
+	movi	a3, 0
+1:
+#endif
+	wsr	a3, cpenable
+#endif
+
+#if XCHAL_HAVE_EXCLUSIVE
+	l32i	a3, a5, THREAD_ATOMCTL8
+	getex	a3
+	s32i	a3, a4, THREAD_ATOMCTL8
+#endif
+
+	/* Flush register file. */
+
+#if defined(__XTENSA_WINDOWED_ABI__)
+	spill_registers_kernel
+#endif
+
+	/* Set kernel stack (and leave critical section)
+	 * Note: It's save to set it here. The stack will not be overwritten
+	 *       because the kernel stack will only be loaded again after
+	 *       we return from kernel space.
+	 */
+
+	rsr	a3, excsave1		# exc_table
+	addi	a7, a5, PT_REGS_OFFSET
+	s32i	a7, a3, EXC_TABLE_KSTK
+
+	/* restore context of the task 'next' */
+
+	l32i	a0, a11, THREAD_RA	# restore return address
+	l32i	a1, a11, THREAD_SP	# restore stack pointer
+
+	load_xtregs_user a5 a6 a8 a9 a12 a13 THREAD_XTREGS_USER
+
+	wsr	a14, ps
+	rsync
+
+#if defined(__XTENSA_WINDOWED_ABI__)
+	abi_ret(XTENSA_SPILL_STACK_RESERVE)
+#elif defined(__XTENSA_CALL0_ABI__)
+	l32i	a12, sp, 0
+	l32i	a13, sp, 4
+	l32i	a14, sp, 8
+	l32i	a15, sp, 12
+	abi_ret(16)
+#else
+#error Unsupported Xtensa ABI
+#endif
+
+ENDPROC(_switch_to)
+
+ENTRY(ret_from_fork)
+
+	/* void schedule_tail (struct task_struct *prev)
+	 * Note: prev is still in abi_arg0 (return value from fake call frame)
+	 */
+	abi_call	schedule_tail
+
+	mov		abi_arg0, a1
+	abi_call	do_syscall_trace_leave
+	j		common_exception_return
+
+ENDPROC(ret_from_fork)
+
+/*
+ * Kernel thread creation helper
+ * On entry, set up by copy_thread: abi_saved0 = thread_fn,
+ * abi_saved1 = thread_fn arg. Left from _switch_to: abi_arg0 = prev
+ */
+ENTRY(ret_from_kernel_thread)
+
+	abi_call	schedule_tail
+	mov		abi_arg0, abi_saved1
+	abi_callx	abi_saved0
+	j		common_exception_return
+
+ENDPROC(ret_from_kernel_thread)
+
+#ifdef CONFIG_HIBERNATION
+
+	.section	.bss, "aw"
+	.align	4
+.Lsaved_regs:
+#if defined(__XTENSA_WINDOWED_ABI__)
+	.fill	2, 4
+#elif defined(__XTENSA_CALL0_ABI__)
+	.fill	6, 4
+#else
+#error Unsupported Xtensa ABI
+#endif
+	.align	XCHAL_NCP_SA_ALIGN
+.Lsaved_user_regs:
+	.fill	XTREGS_USER_SIZE, 1
+
+	.previous
+
+ENTRY(swsusp_arch_suspend)
+
+	abi_entry_default
+
+	movi		a2, .Lsaved_regs
+	movi		a3, .Lsaved_user_regs
+	s32i		a0, a2, 0
+	s32i		a1, a2, 4
+	save_xtregs_user a3 a4 a5 a6 a7 a8 0
+#if defined(__XTENSA_WINDOWED_ABI__)
+	spill_registers_kernel
+#elif defined(__XTENSA_CALL0_ABI__)
+	s32i		a12, a2, 8
+	s32i		a13, a2, 12
+	s32i		a14, a2, 16
+	s32i		a15, a2, 20
+#else
+#error Unsupported Xtensa ABI
+#endif
+	abi_call	swsusp_save
+	mov		a2, abi_rv
+	abi_ret_default
+
+ENDPROC(swsusp_arch_suspend)
+
+ENTRY(swsusp_arch_resume)
+
+	abi_entry_default
+
+#if defined(__XTENSA_WINDOWED_ABI__)
+	spill_registers_kernel
+#endif
+
+	movi		a2, restore_pblist
+	l32i		a2, a2, 0
+
+.Lcopy_pbe:
+	l32i		a3, a2, PBE_ADDRESS
+	l32i		a4, a2, PBE_ORIG_ADDRESS
+
+	__loopi		a3, a9, PAGE_SIZE, 16
+	l32i		a5, a3, 0
+	l32i		a6, a3, 4
+	l32i		a7, a3, 8
+	l32i		a8, a3, 12
+	addi		a3, a3, 16
+	s32i		a5, a4, 0
+	s32i		a6, a4, 4
+	s32i		a7, a4, 8
+	s32i		a8, a4, 12
+	addi		a4, a4, 16
+	__endl		a3, a9
+
+	l32i		a2, a2, PBE_NEXT
+	bnez		a2, .Lcopy_pbe
+
+	movi		a2, .Lsaved_regs
+	movi		a3, .Lsaved_user_regs
+	l32i		a0, a2, 0
+	l32i		a1, a2, 4
+	load_xtregs_user a3 a4 a5 a6 a7 a8 0
+#if defined(__XTENSA_CALL0_ABI__)
+	l32i		a12, a2, 8
+	l32i		a13, a2, 12
+	l32i		a14, a2, 16
+	l32i		a15, a2, 20
+#endif
+	movi		a2, 0
+	abi_ret_default
+
+ENDPROC(swsusp_arch_resume)
+
+#endif
diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S
new file mode 100644
index 000000000..8484294bc
--- /dev/null
+++ b/arch/xtensa/kernel/head.S
@@ -0,0 +1,386 @@
+/*
+ * arch/xtensa/kernel/head.S
+ *
+ * Xtensa Processor startup code.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2008 Tensilica Inc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ * Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca>
+ * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com>
+ * Kevin Chea
+ */
+
+#include <asm/asmmacro.h>
+#include <asm/processor.h>
+#include <asm/page.h>
+#include <asm/cacheasm.h>
+#include <asm/initialize_mmu.h>
+#include <asm/mxregs.h>
+
+#include <linux/init.h>
+#include <linux/linkage.h>
+
+/*
+ * This module contains the entry code for kernel images. It performs the
+ * minimal setup needed to call the generic C routines.
+ *
+ * Prerequisites:
+ *
+ * - The kernel image has been loaded to the actual address where it was
+ *   compiled to.
+ * - a2 contains either 0 or a pointer to a list of boot parameters.
+ *   (see setup.c for more details)
+ *
+ */
+
+/*
+ *  _start
+ *
+ *  The bootloader passes a pointer to a list of boot parameters in a2.
+ */
+
+	/* The first bytes of the kernel image must be an instruction, so we
+	 * manually allocate and define the literal constant we need for a jx
+	 * instruction.
+	 */
+
+	__HEAD
+	.begin	no-absolute-literals
+
+ENTRY(_start)
+
+	/* Preserve the pointer to the boot parameter list in EXCSAVE_1 */
+	wsr     a2, excsave1
+	_j	_SetupOCD
+
+	.align	4
+	.literal_position
+_SetupOCD:
+	/*
+	 * Initialize WB, WS, and clear PS.EXCM (to allow loop instructions).
+	 * Set Interrupt Level just below XCHAL_DEBUGLEVEL to allow
+	 * xt-gdb to single step via DEBUG exceptions received directly
+	 * by ocd.
+	 */
+#if XCHAL_HAVE_WINDOWED
+	movi	a1, 1
+	movi	a0, 0
+	wsr	a1, windowstart
+	wsr	a0, windowbase
+	rsync
+#endif
+
+	movi	a1, LOCKLEVEL
+	wsr	a1, ps
+	rsync
+
+	.global _SetupMMU
+_SetupMMU:
+	Offset = _SetupMMU - _start
+
+#ifdef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
+	initialize_mmu
+#if defined(CONFIG_MMU) && XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
+	rsr	a2, excsave1
+	movi	a3, XCHAL_KSEG_PADDR
+	bltu	a2, a3, 1f
+	sub	a2, a2, a3
+	movi	a3, XCHAL_KSEG_SIZE
+	bgeu	a2, a3, 1f
+	movi	a3, XCHAL_KSEG_CACHED_VADDR
+	add	a2, a2, a3
+	wsr	a2, excsave1
+1:
+#endif
+#endif
+
+	movi	a0, _startup
+	jx	a0
+
+ENDPROC(_start)
+	.end	no-absolute-literals
+
+	__REF
+	.literal_position
+
+ENTRY(_startup)
+
+	/* Set a0 to 0 for the remaining initialization. */
+
+	movi	a0, 0
+
+#if XCHAL_HAVE_VECBASE
+	movi    a2, VECBASE_VADDR
+	wsr	a2, vecbase
+#endif
+
+	/* Clear debugging registers. */
+
+#if XCHAL_HAVE_DEBUG
+#if XCHAL_NUM_IBREAK > 0
+	wsr	a0, ibreakenable
+#endif
+	wsr	a0, icount
+	movi	a1, 15
+	wsr	a0, icountlevel
+
+	.set	_index, 0
+	.rept	XCHAL_NUM_DBREAK
+	wsr	a0, SREG_DBREAKC + _index
+	.set	_index, _index + 1
+	.endr
+#endif
+
+	/* Clear CCOUNT (not really necessary, but nice) */
+
+	wsr	a0, ccount	# not really necessary, but nice
+
+	/* Disable zero-loops. */
+
+#if XCHAL_HAVE_LOOPS
+	wsr	a0, lcount
+#endif
+
+	/* Disable all timers. */
+
+	.set	_index, 0
+	.rept	XCHAL_NUM_TIMERS
+	wsr	a0, SREG_CCOMPARE + _index
+	.set	_index, _index + 1
+	.endr
+
+	/* Interrupt initialization. */
+
+	movi	a2, XCHAL_INTTYPE_MASK_SOFTWARE | XCHAL_INTTYPE_MASK_EXTERN_EDGE
+	wsr	a0, intenable
+	wsr	a2, intclear
+
+	/* Disable coprocessors. */
+
+#if XCHAL_HAVE_CP
+	wsr	a0, cpenable
+#endif
+
+	/*  Initialize the caches.
+	 *  a2, a3 are just working registers (clobbered).
+	 */
+
+#if XCHAL_DCACHE_LINE_LOCKABLE
+	___unlock_dcache_all a2 a3
+#endif
+
+#if XCHAL_ICACHE_LINE_LOCKABLE
+	___unlock_icache_all a2 a3
+#endif
+
+	___invalidate_dcache_all a2 a3
+	___invalidate_icache_all a2 a3
+
+	isync
+
+	initialize_cacheattr
+
+#ifdef CONFIG_HAVE_SMP
+	movi	a2, CCON	# MX External Register to Configure Cache
+	movi	a3, 1
+	wer	a3, a2
+#endif
+
+	/* Setup stack and enable window exceptions (keep irqs disabled) */
+
+	movi	a1, start_info
+	l32i	a1, a1, 0
+
+	/* Disable interrupts. */
+	/* Enable window exceptions if kernel is built with windowed ABI. */
+	movi	a2, KERNEL_PS_WOE_MASK | LOCKLEVEL
+	wsr	a2, ps
+	rsync
+
+#ifdef CONFIG_SMP
+	/*
+	 * Notice that we assume with SMP that cores have PRID
+	 * supported by the cores.
+	 */
+	rsr	a2, prid
+	bnez	a2, .Lboot_secondary
+
+#endif  /* CONFIG_SMP */
+
+	/* Unpack data sections
+	 *
+	 * The linker script used to build the Linux kernel image
+	 * creates a table located at __boot_reloc_table_start
+	 * that contains the information what data needs to be unpacked.
+	 *
+	 * Uses a2-a7.
+	 */
+
+	movi	a2, __boot_reloc_table_start
+	movi	a3, __boot_reloc_table_end
+
+1:	beq	a2, a3, 3f	# no more entries?
+	l32i	a4, a2, 0	# start destination (in RAM)
+	l32i	a5, a2, 4	# end destination (in RAM)
+	l32i	a6, a2, 8	# start source (in ROM)
+	addi	a2, a2, 12	# next entry
+	beq	a4, a5, 1b	# skip, empty entry
+	beq	a4, a6, 1b	# skip, source and dest. are the same
+
+2:	l32i	a7, a6, 0	# load word
+	addi	a6, a6, 4
+	s32i	a7, a4, 0	# store word
+	addi	a4, a4, 4
+	bltu	a4, a5, 2b
+	j	1b
+
+3:
+	/* All code and initialized data segments have been copied.
+	 * Now clear the BSS segment.
+	 */
+
+	movi	a2, __bss_start	# start of BSS
+	movi	a3, __bss_stop	# end of BSS
+
+	__loopt	a2, a3, a4, 2
+	s32i	a0, a2, 0
+	__endla	a2, a3, 4
+
+#if XCHAL_DCACHE_IS_WRITEBACK
+
+	/* After unpacking, flush the writeback cache to memory so the
+	 * instructions/data are available.
+	 */
+
+	___flush_dcache_all a2 a3
+#endif
+	memw
+	isync
+	___invalidate_icache_all a2 a3
+	isync
+
+#ifdef CONFIG_XIP_KERNEL
+	/* Setup bootstrap CPU stack in XIP kernel */
+
+	movi	a1, start_info
+	l32i	a1, a1, 0
+#endif
+
+	movi	abi_arg0, 0
+	xsr	abi_arg0, excsave1
+
+	/* init_arch kick-starts the linux kernel */
+
+	abi_call	init_arch
+	abi_call	start_kernel
+
+should_never_return:
+	j	should_never_return
+
+#ifdef CONFIG_SMP
+.Lboot_secondary:
+
+	movi	a2, cpu_start_ccount
+1:
+	memw
+	l32i	a3, a2, 0
+	beqi	a3, 0, 1b
+	movi	a3, 0
+	s32i	a3, a2, 0
+1:
+	memw
+	l32i	a3, a2, 0
+	beqi	a3, 0, 1b
+	wsr	a3, ccount
+	movi	a3, 0
+	s32i	a3, a2, 0
+	memw
+
+	movi	abi_arg0, 0
+	wsr	abi_arg0, excsave1
+
+	abi_call	secondary_start_kernel
+	j	should_never_return
+
+#endif  /* CONFIG_SMP */
+
+ENDPROC(_startup)
+
+#ifdef CONFIG_HOTPLUG_CPU
+
+ENTRY(cpu_restart)
+
+#if XCHAL_DCACHE_IS_WRITEBACK
+	___flush_invalidate_dcache_all a2 a3
+#else
+	___invalidate_dcache_all a2 a3
+#endif
+	memw
+	movi	a2, CCON	# MX External Register to Configure Cache
+	movi	a3, 0
+	wer	a3, a2
+	extw
+
+	rsr	a0, prid
+	neg	a2, a0
+	movi	a3, cpu_start_id
+	memw
+	s32i	a2, a3, 0
+#if XCHAL_DCACHE_IS_WRITEBACK
+	dhwbi	a3, 0
+#endif
+1:
+	memw
+	l32i	a2, a3, 0
+	dhi	a3, 0
+	bne	a2, a0, 1b
+
+	/*
+	 * Initialize WB, WS, and clear PS.EXCM (to allow loop instructions).
+	 * Set Interrupt Level just below XCHAL_DEBUGLEVEL to allow
+	 * xt-gdb to single step via DEBUG exceptions received directly
+	 * by ocd.
+	 */
+	movi	a1, 1
+	movi	a0, 0
+	wsr	a1, windowstart
+	wsr	a0, windowbase
+	rsync
+
+	movi	a1, LOCKLEVEL
+	wsr	a1, ps
+	rsync
+
+	j	_startup
+
+ENDPROC(cpu_restart)
+
+#endif  /* CONFIG_HOTPLUG_CPU */
+
+/*
+ * DATA section
+ */
+
+	__REFDATA
+	.align  4
+ENTRY(start_info)
+	.long	init_thread_union + KERNEL_STACK_SIZE
+
+/*
+ * BSS section
+ */
+	
+__PAGE_ALIGNED_BSS
+#ifdef CONFIG_MMU
+ENTRY(swapper_pg_dir)
+	.fill	PAGE_SIZE, 1, 0
+END(swapper_pg_dir)
+#endif
+ENTRY(empty_zero_page)
+	.fill	PAGE_SIZE, 1, 0
+END(empty_zero_page)
diff --git a/arch/xtensa/kernel/hibernate.c b/arch/xtensa/kernel/hibernate.c
new file mode 100644
index 000000000..06984327d
--- /dev/null
+++ b/arch/xtensa/kernel/hibernate.c
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/mm.h>
+#include <linux/suspend.h>
+#include <asm/coprocessor.h>
+
+int pfn_is_nosave(unsigned long pfn)
+{
+	unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin));
+	unsigned long nosave_end_pfn = PFN_UP(__pa(&__nosave_end));
+
+	return	(pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
+}
+
+void notrace save_processor_state(void)
+{
+	WARN_ON(num_online_cpus() != 1);
+#if XTENSA_HAVE_COPROCESSORS
+	local_coprocessors_flush_release_all();
+#endif
+}
+
+void notrace restore_processor_state(void)
+{
+}
diff --git a/arch/xtensa/kernel/hw_breakpoint.c b/arch/xtensa/kernel/hw_breakpoint.c
new file mode 100644
index 000000000..285fb2942
--- /dev/null
+++ b/arch/xtensa/kernel/hw_breakpoint.c
@@ -0,0 +1,308 @@
+/*
+ * Xtensa hardware breakpoints/watchpoints handling functions
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2016 Cadence Design Systems Inc.
+ */
+
+#include <linux/hw_breakpoint.h>
+#include <linux/log2.h>
+#include <linux/percpu.h>
+#include <linux/perf_event.h>
+#include <asm/core.h>
+
+/* Breakpoint currently in use for each IBREAKA. */
+static DEFINE_PER_CPU(struct perf_event *, bp_on_reg[XCHAL_NUM_IBREAK]);
+
+/* Watchpoint currently in use for each DBREAKA. */
+static DEFINE_PER_CPU(struct perf_event *, wp_on_reg[XCHAL_NUM_DBREAK]);
+
+int hw_breakpoint_slots(int type)
+{
+	switch (type) {
+	case TYPE_INST:
+		return XCHAL_NUM_IBREAK;
+	case TYPE_DATA:
+		return XCHAL_NUM_DBREAK;
+	default:
+		pr_warn("unknown slot type: %d\n", type);
+		return 0;
+	}
+}
+
+int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw)
+{
+	unsigned int len;
+	unsigned long va;
+
+	va = hw->address;
+	len = hw->len;
+
+	return (va >= TASK_SIZE) && ((va + len - 1) >= TASK_SIZE);
+}
+
+/*
+ * Construct an arch_hw_breakpoint from a perf_event.
+ */
+int hw_breakpoint_arch_parse(struct perf_event *bp,
+			     const struct perf_event_attr *attr,
+			     struct arch_hw_breakpoint *hw)
+{
+	/* Type */
+	switch (attr->bp_type) {
+	case HW_BREAKPOINT_X:
+		hw->type = XTENSA_BREAKPOINT_EXECUTE;
+		break;
+	case HW_BREAKPOINT_R:
+		hw->type = XTENSA_BREAKPOINT_LOAD;
+		break;
+	case HW_BREAKPOINT_W:
+		hw->type = XTENSA_BREAKPOINT_STORE;
+		break;
+	case HW_BREAKPOINT_RW:
+		hw->type = XTENSA_BREAKPOINT_LOAD | XTENSA_BREAKPOINT_STORE;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* Len */
+	hw->len = attr->bp_len;
+	if (hw->len < 1 || hw->len > 64 || !is_power_of_2(hw->len))
+		return -EINVAL;
+
+	/* Address */
+	hw->address = attr->bp_addr;
+	if (hw->address & (hw->len - 1))
+		return -EINVAL;
+
+	return 0;
+}
+
+int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
+				    unsigned long val, void *data)
+{
+	return NOTIFY_DONE;
+}
+
+static void xtensa_wsr(unsigned long v, u8 sr)
+{
+	/* We don't have indexed wsr and creating instruction dynamically
+	 * doesn't seem worth it given how small XCHAL_NUM_IBREAK and
+	 * XCHAL_NUM_DBREAK are. Thus the switch. In case build breaks here
+	 * the switch below needs to be extended.
+	 */
+	BUILD_BUG_ON(XCHAL_NUM_IBREAK > 2);
+	BUILD_BUG_ON(XCHAL_NUM_DBREAK > 2);
+
+	switch (sr) {
+#if XCHAL_NUM_IBREAK > 0
+	case SREG_IBREAKA + 0:
+		xtensa_set_sr(v, SREG_IBREAKA + 0);
+		break;
+#endif
+#if XCHAL_NUM_IBREAK > 1
+	case SREG_IBREAKA + 1:
+		xtensa_set_sr(v, SREG_IBREAKA + 1);
+		break;
+#endif
+
+#if XCHAL_NUM_DBREAK > 0
+	case SREG_DBREAKA + 0:
+		xtensa_set_sr(v, SREG_DBREAKA + 0);
+		break;
+	case SREG_DBREAKC + 0:
+		xtensa_set_sr(v, SREG_DBREAKC + 0);
+		break;
+#endif
+#if XCHAL_NUM_DBREAK > 1
+	case SREG_DBREAKA + 1:
+		xtensa_set_sr(v, SREG_DBREAKA + 1);
+		break;
+
+	case SREG_DBREAKC + 1:
+		xtensa_set_sr(v, SREG_DBREAKC + 1);
+		break;
+#endif
+	}
+}
+
+static int alloc_slot(struct perf_event **slot, size_t n,
+		      struct perf_event *bp)
+{
+	size_t i;
+
+	for (i = 0; i < n; ++i) {
+		if (!slot[i]) {
+			slot[i] = bp;
+			return i;
+		}
+	}
+	return -EBUSY;
+}
+
+static void set_ibreak_regs(int reg, struct perf_event *bp)
+{
+	struct arch_hw_breakpoint *info = counter_arch_bp(bp);
+	unsigned long ibreakenable;
+
+	xtensa_wsr(info->address, SREG_IBREAKA + reg);
+	ibreakenable = xtensa_get_sr(SREG_IBREAKENABLE);
+	xtensa_set_sr(ibreakenable | (1 << reg), SREG_IBREAKENABLE);
+}
+
+static void set_dbreak_regs(int reg, struct perf_event *bp)
+{
+	struct arch_hw_breakpoint *info = counter_arch_bp(bp);
+	unsigned long dbreakc = DBREAKC_MASK_MASK & -info->len;
+
+	if (info->type & XTENSA_BREAKPOINT_LOAD)
+		dbreakc |= DBREAKC_LOAD_MASK;
+	if (info->type & XTENSA_BREAKPOINT_STORE)
+		dbreakc |= DBREAKC_STOR_MASK;
+
+	xtensa_wsr(info->address, SREG_DBREAKA + reg);
+	xtensa_wsr(dbreakc, SREG_DBREAKC + reg);
+}
+
+int arch_install_hw_breakpoint(struct perf_event *bp)
+{
+	int i;
+
+	if (counter_arch_bp(bp)->type == XTENSA_BREAKPOINT_EXECUTE) {
+		/* Breakpoint */
+		i = alloc_slot(this_cpu_ptr(bp_on_reg), XCHAL_NUM_IBREAK, bp);
+		if (i < 0)
+			return i;
+		set_ibreak_regs(i, bp);
+
+	} else {
+		/* Watchpoint */
+		i = alloc_slot(this_cpu_ptr(wp_on_reg), XCHAL_NUM_DBREAK, bp);
+		if (i < 0)
+			return i;
+		set_dbreak_regs(i, bp);
+	}
+	return 0;
+}
+
+static int free_slot(struct perf_event **slot, size_t n,
+		     struct perf_event *bp)
+{
+	size_t i;
+
+	for (i = 0; i < n; ++i) {
+		if (slot[i] == bp) {
+			slot[i] = NULL;
+			return i;
+		}
+	}
+	return -EBUSY;
+}
+
+void arch_uninstall_hw_breakpoint(struct perf_event *bp)
+{
+	struct arch_hw_breakpoint *info = counter_arch_bp(bp);
+	int i;
+
+	if (info->type == XTENSA_BREAKPOINT_EXECUTE) {
+		unsigned long ibreakenable;
+
+		/* Breakpoint */
+		i = free_slot(this_cpu_ptr(bp_on_reg), XCHAL_NUM_IBREAK, bp);
+		if (i >= 0) {
+			ibreakenable = xtensa_get_sr(SREG_IBREAKENABLE);
+			xtensa_set_sr(ibreakenable & ~(1 << i),
+				      SREG_IBREAKENABLE);
+		}
+	} else {
+		/* Watchpoint */
+		i = free_slot(this_cpu_ptr(wp_on_reg), XCHAL_NUM_DBREAK, bp);
+		if (i >= 0)
+			xtensa_wsr(0, SREG_DBREAKC + i);
+	}
+}
+
+void hw_breakpoint_pmu_read(struct perf_event *bp)
+{
+}
+
+void flush_ptrace_hw_breakpoint(struct task_struct *tsk)
+{
+	int i;
+	struct thread_struct *t = &tsk->thread;
+
+	for (i = 0; i < XCHAL_NUM_IBREAK; ++i) {
+		if (t->ptrace_bp[i]) {
+			unregister_hw_breakpoint(t->ptrace_bp[i]);
+			t->ptrace_bp[i] = NULL;
+		}
+	}
+	for (i = 0; i < XCHAL_NUM_DBREAK; ++i) {
+		if (t->ptrace_wp[i]) {
+			unregister_hw_breakpoint(t->ptrace_wp[i]);
+			t->ptrace_wp[i] = NULL;
+		}
+	}
+}
+
+/*
+ * Set ptrace breakpoint pointers to zero for this task.
+ * This is required in order to prevent child processes from unregistering
+ * breakpoints held by their parent.
+ */
+void clear_ptrace_hw_breakpoint(struct task_struct *tsk)
+{
+	memset(tsk->thread.ptrace_bp, 0, sizeof(tsk->thread.ptrace_bp));
+	memset(tsk->thread.ptrace_wp, 0, sizeof(tsk->thread.ptrace_wp));
+}
+
+void restore_dbreak(void)
+{
+	int i;
+
+	for (i = 0; i < XCHAL_NUM_DBREAK; ++i) {
+		struct perf_event *bp = this_cpu_ptr(wp_on_reg)[i];
+
+		if (bp)
+			set_dbreak_regs(i, bp);
+	}
+	clear_thread_flag(TIF_DB_DISABLED);
+}
+
+int check_hw_breakpoint(struct pt_regs *regs)
+{
+	if (regs->debugcause & BIT(DEBUGCAUSE_IBREAK_BIT)) {
+		int i;
+		struct perf_event **bp = this_cpu_ptr(bp_on_reg);
+
+		for (i = 0; i < XCHAL_NUM_IBREAK; ++i) {
+			if (bp[i] && !bp[i]->attr.disabled &&
+			    regs->pc == bp[i]->attr.bp_addr)
+				perf_bp_event(bp[i], regs);
+		}
+		return 0;
+	} else if (regs->debugcause & BIT(DEBUGCAUSE_DBREAK_BIT)) {
+		struct perf_event **bp = this_cpu_ptr(wp_on_reg);
+		int dbnum = (regs->debugcause & DEBUGCAUSE_DBNUM_MASK) >>
+			DEBUGCAUSE_DBNUM_SHIFT;
+
+		if (dbnum < XCHAL_NUM_DBREAK && bp[dbnum]) {
+			if (user_mode(regs)) {
+				perf_bp_event(bp[dbnum], regs);
+			} else {
+				set_thread_flag(TIF_DB_DISABLED);
+				xtensa_wsr(0, SREG_DBREAKC + dbnum);
+			}
+		} else {
+			WARN_ONCE(1,
+				  "Wrong/unconfigured DBNUM reported in DEBUGCAUSE: %d\n",
+				  dbnum);
+		}
+		return 0;
+	}
+	return -ENOENT;
+}
diff --git a/arch/xtensa/kernel/irq.c b/arch/xtensa/kernel/irq.c
new file mode 100644
index 000000000..42f106004
--- /dev/null
+++ b/arch/xtensa/kernel/irq.c
@@ -0,0 +1,194 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/arch/xtensa/kernel/irq.c
+ *
+ * Xtensa built-in interrupt controller and some generic functions copied
+ * from i386.
+ *
+ * Copyright (C) 2002 - 2013 Tensilica, Inc.
+ * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
+ *
+ *
+ * Chris Zankel <chris@zankel.net>
+ * Kevin Chea
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/seq_file.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel_stat.h>
+#include <linux/irqchip.h>
+#include <linux/irqchip/xtensa-mx.h>
+#include <linux/irqchip/xtensa-pic.h>
+#include <linux/irqdomain.h>
+#include <linux/of.h>
+
+#include <asm/mxregs.h>
+#include <linux/uaccess.h>
+#include <asm/platform.h>
+
+DECLARE_PER_CPU(unsigned long, nmi_count);
+
+asmlinkage void do_IRQ(int hwirq, struct pt_regs *regs)
+{
+#ifdef CONFIG_DEBUG_STACKOVERFLOW
+	/* Debugging check for stack overflow: is there less than 1KB free? */
+	{
+		unsigned long sp = current_stack_pointer;
+
+		sp &= THREAD_SIZE - 1;
+
+		if (unlikely(sp < (sizeof(thread_info) + 1024)))
+			printk("Stack overflow in do_IRQ: %ld\n",
+			       sp - sizeof(struct thread_info));
+	}
+#endif
+	generic_handle_domain_irq(NULL, hwirq);
+}
+
+int arch_show_interrupts(struct seq_file *p, int prec)
+{
+	unsigned cpu __maybe_unused;
+#ifdef CONFIG_SMP
+	show_ipi_list(p, prec);
+#endif
+#if XTENSA_FAKE_NMI
+	seq_printf(p, "%*s:", prec, "NMI");
+	for_each_online_cpu(cpu)
+		seq_printf(p, " %10lu", per_cpu(nmi_count, cpu));
+	seq_puts(p, "   Non-maskable interrupts\n");
+#endif
+	return 0;
+}
+
+int xtensa_irq_domain_xlate(const u32 *intspec, unsigned int intsize,
+		unsigned long int_irq, unsigned long ext_irq,
+		unsigned long *out_hwirq, unsigned int *out_type)
+{
+	if (WARN_ON(intsize < 1 || intsize > 2))
+		return -EINVAL;
+	if (intsize == 2 && intspec[1] == 1) {
+		int_irq = xtensa_map_ext_irq(ext_irq);
+		if (int_irq < XCHAL_NUM_INTERRUPTS)
+			*out_hwirq = int_irq;
+		else
+			return -EINVAL;
+	} else {
+		*out_hwirq = int_irq;
+	}
+	*out_type = IRQ_TYPE_NONE;
+	return 0;
+}
+
+int xtensa_irq_map(struct irq_domain *d, unsigned int irq,
+		irq_hw_number_t hw)
+{
+	struct irq_chip *irq_chip = d->host_data;
+	u32 mask = 1 << hw;
+
+	if (mask & XCHAL_INTTYPE_MASK_SOFTWARE) {
+		irq_set_chip_and_handler_name(irq, irq_chip,
+				handle_simple_irq, "level");
+		irq_set_status_flags(irq, IRQ_LEVEL);
+	} else if (mask & XCHAL_INTTYPE_MASK_EXTERN_EDGE) {
+		irq_set_chip_and_handler_name(irq, irq_chip,
+				handle_edge_irq, "edge");
+		irq_clear_status_flags(irq, IRQ_LEVEL);
+	} else if (mask & XCHAL_INTTYPE_MASK_EXTERN_LEVEL) {
+		irq_set_chip_and_handler_name(irq, irq_chip,
+				handle_level_irq, "level");
+		irq_set_status_flags(irq, IRQ_LEVEL);
+	} else if (mask & XCHAL_INTTYPE_MASK_TIMER) {
+		irq_set_chip_and_handler_name(irq, irq_chip,
+				handle_percpu_irq, "timer");
+		irq_clear_status_flags(irq, IRQ_LEVEL);
+#ifdef XCHAL_INTTYPE_MASK_PROFILING
+	} else if (mask & XCHAL_INTTYPE_MASK_PROFILING) {
+		irq_set_chip_and_handler_name(irq, irq_chip,
+				handle_percpu_irq, "profiling");
+		irq_set_status_flags(irq, IRQ_LEVEL);
+#endif
+	} else {/* XCHAL_INTTYPE_MASK_WRITE_ERROR */
+		/* XCHAL_INTTYPE_MASK_NMI */
+		irq_set_chip_and_handler_name(irq, irq_chip,
+				handle_level_irq, "level");
+		irq_set_status_flags(irq, IRQ_LEVEL);
+	}
+	return 0;
+}
+
+unsigned xtensa_map_ext_irq(unsigned ext_irq)
+{
+	unsigned mask = XCHAL_INTTYPE_MASK_EXTERN_EDGE |
+		XCHAL_INTTYPE_MASK_EXTERN_LEVEL;
+	unsigned i;
+
+	for (i = 0; mask; ++i, mask >>= 1) {
+		if ((mask & 1) && ext_irq-- == 0)
+			return i;
+	}
+	return XCHAL_NUM_INTERRUPTS;
+}
+
+unsigned xtensa_get_ext_irq_no(unsigned irq)
+{
+	unsigned mask = (XCHAL_INTTYPE_MASK_EXTERN_EDGE |
+		XCHAL_INTTYPE_MASK_EXTERN_LEVEL) &
+		((1u << irq) - 1);
+	return hweight32(mask);
+}
+
+void __init init_IRQ(void)
+{
+#ifdef CONFIG_USE_OF
+	irqchip_init();
+#else
+#ifdef CONFIG_HAVE_SMP
+	xtensa_mx_init_legacy(NULL);
+#else
+	xtensa_pic_init_legacy(NULL);
+#endif
+#endif
+
+#ifdef CONFIG_SMP
+	ipi_init();
+#endif
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+/*
+ * The CPU has been marked offline.  Migrate IRQs off this CPU.  If
+ * the affinity settings do not allow other CPUs, force them onto any
+ * available CPU.
+ */
+void migrate_irqs(void)
+{
+	unsigned int i, cpu = smp_processor_id();
+
+	for_each_active_irq(i) {
+		struct irq_data *data = irq_get_irq_data(i);
+		const struct cpumask *mask;
+		unsigned int newcpu;
+
+		if (irqd_is_per_cpu(data))
+			continue;
+
+		mask = irq_data_get_affinity_mask(data);
+		if (!cpumask_test_cpu(cpu, mask))
+			continue;
+
+		newcpu = cpumask_any_and(mask, cpu_online_mask);
+
+		if (newcpu >= nr_cpu_ids) {
+			pr_info_ratelimited("IRQ%u no longer affine to CPU%u\n",
+					    i, cpu);
+
+			irq_set_affinity(i, cpu_all_mask);
+		} else {
+			irq_set_affinity(i, mask);
+		}
+	}
+}
+#endif /* CONFIG_HOTPLUG_CPU */
diff --git a/arch/xtensa/kernel/jump_label.c b/arch/xtensa/kernel/jump_label.c
new file mode 100644
index 000000000..ad1841cec
--- /dev/null
+++ b/arch/xtensa/kernel/jump_label.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Cadence Design Systems Inc.
+
+#include <linux/cpu.h>
+#include <linux/jump_label.h>
+#include <linux/kernel.h>
+#include <linux/memory.h>
+#include <linux/stop_machine.h>
+#include <linux/types.h>
+
+#include <asm/cacheflush.h>
+
+#define J_OFFSET_MASK 0x0003ffff
+#define J_SIGN_MASK (~(J_OFFSET_MASK >> 1))
+
+#if defined(__XTENSA_EL__)
+#define J_INSN 0x6
+#define NOP_INSN 0x0020f0
+#elif defined(__XTENSA_EB__)
+#define J_INSN 0x60000000
+#define NOP_INSN 0x0f020000
+#else
+#error Unsupported endianness.
+#endif
+
+struct patch {
+	atomic_t cpu_count;
+	unsigned long addr;
+	size_t sz;
+	const void *data;
+};
+
+static void local_patch_text(unsigned long addr, const void *data, size_t sz)
+{
+	memcpy((void *)addr, data, sz);
+	local_flush_icache_range(addr, addr + sz);
+}
+
+static int patch_text_stop_machine(void *data)
+{
+	struct patch *patch = data;
+
+	if (atomic_inc_return(&patch->cpu_count) == num_online_cpus()) {
+		local_patch_text(patch->addr, patch->data, patch->sz);
+		atomic_inc(&patch->cpu_count);
+	} else {
+		while (atomic_read(&patch->cpu_count) <= num_online_cpus())
+			cpu_relax();
+		__invalidate_icache_range(patch->addr, patch->sz);
+	}
+	return 0;
+}
+
+static void patch_text(unsigned long addr, const void *data, size_t sz)
+{
+	if (IS_ENABLED(CONFIG_SMP)) {
+		struct patch patch = {
+			.cpu_count = ATOMIC_INIT(0),
+			.addr = addr,
+			.sz = sz,
+			.data = data,
+		};
+		stop_machine_cpuslocked(patch_text_stop_machine,
+					&patch, cpu_online_mask);
+	} else {
+		unsigned long flags;
+
+		local_irq_save(flags);
+		local_patch_text(addr, data, sz);
+		local_irq_restore(flags);
+	}
+}
+
+void arch_jump_label_transform(struct jump_entry *e,
+			       enum jump_label_type type)
+{
+	u32 d = (jump_entry_target(e) - (jump_entry_code(e) + 4));
+	u32 insn;
+
+	/* Jump only works within 128K of the J instruction. */
+	BUG_ON(!((d & J_SIGN_MASK) == 0 ||
+		 (d & J_SIGN_MASK) == J_SIGN_MASK));
+
+	if (type == JUMP_LABEL_JMP) {
+#if defined(__XTENSA_EL__)
+		insn = ((d & J_OFFSET_MASK) << 6) | J_INSN;
+#elif defined(__XTENSA_EB__)
+		insn = ((d & J_OFFSET_MASK) << 8) | J_INSN;
+#endif
+	} else {
+		insn = NOP_INSN;
+	}
+
+	patch_text(jump_entry_code(e), &insn, JUMP_LABEL_NOP_SIZE);
+}
diff --git a/arch/xtensa/kernel/mcount.S b/arch/xtensa/kernel/mcount.S
new file mode 100644
index 000000000..51daaf4e0
--- /dev/null
+++ b/arch/xtensa/kernel/mcount.S
@@ -0,0 +1,85 @@
+/*
+ * arch/xtensa/kernel/mcount.S
+ *
+ * Xtensa specific mcount support
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2013 Tensilica Inc.
+ */
+
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/ftrace.h>
+
+/*
+ * Entry condition:
+ *
+ *   a2:	a0 of the caller in windowed ABI
+ *   a10:	a0 of the caller in call0 ABI
+ *
+ * In call0 ABI the function _mcount is called with the special ABI:
+ * its argument is in a10 and all the usual argument registers (a2 - a7)
+ * must be preserved in addition to callee-saved a12 - a15.
+ */
+
+ENTRY(_mcount)
+#if defined(__XTENSA_WINDOWED_ABI__)
+	abi_entry_default
+
+	movi	a4, ftrace_trace_function
+	l32i	a4, a4, 0
+	movi	a3, ftrace_stub
+	bne	a3, a4, 1f
+	abi_ret_default
+
+1: 	xor	a7, a2, a1
+	movi	a3, 0x3fffffff
+	and	a7, a7, a3
+	xor	a7, a7, a1
+
+	xor	a6, a0, a1
+	and	a6, a6, a3
+	xor	a6, a6, a1
+	addi	a6, a6, -MCOUNT_INSN_SIZE
+	callx4	a4
+
+	abi_ret_default
+#elif defined(__XTENSA_CALL0_ABI__)
+	abi_entry_default
+
+	movi	a9, ftrace_trace_function
+	l32i	a9, a9, 0
+	movi	a11, ftrace_stub
+	bne	a9, a11, 1f
+	abi_ret_default
+
+1:	abi_entry(28)
+	s32i	a0, sp, 0
+	s32i	a2, sp, 4
+	s32i	a3, sp, 8
+	s32i	a4, sp, 12
+	s32i	a5, sp, 16
+	s32i	a6, sp, 20
+	s32i	a7, sp, 24
+	addi	a2, a10, -MCOUNT_INSN_SIZE
+	callx0	a9
+	l32i	a0, sp, 0
+	l32i	a2, sp, 4
+	l32i	a3, sp, 8
+	l32i	a4, sp, 12
+	l32i	a5, sp, 16
+	l32i	a6, sp, 20
+	l32i	a7, sp, 24
+	abi_ret(28)
+#else
+#error Unsupported Xtensa ABI
+#endif
+ENDPROC(_mcount)
+
+ENTRY(ftrace_stub)
+	abi_entry_default
+	abi_ret_default
+ENDPROC(ftrace_stub)
diff --git a/arch/xtensa/kernel/module.c b/arch/xtensa/kernel/module.c
new file mode 100644
index 000000000..902845dda
--- /dev/null
+++ b/arch/xtensa/kernel/module.c
@@ -0,0 +1,189 @@
+/*
+ * arch/xtensa/kernel/module.c
+ *
+ * Module support.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2006 Tensilica Inc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleloader.h>
+#include <linux/elf.h>
+#include <linux/vmalloc.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/cache.h>
+
+static int
+decode_calln_opcode (unsigned char *location)
+{
+#ifdef __XTENSA_EB__
+	return (location[0] & 0xf0) == 0x50;
+#endif
+#ifdef __XTENSA_EL__
+	return (location[0] & 0xf) == 0x5;
+#endif
+}
+
+static int
+decode_l32r_opcode (unsigned char *location)
+{
+#ifdef __XTENSA_EB__
+	return (location[0] & 0xf0) == 0x10;
+#endif
+#ifdef __XTENSA_EL__
+	return (location[0] & 0xf) == 0x1;
+#endif
+}
+
+int apply_relocate_add(Elf32_Shdr *sechdrs,
+		       const char *strtab,
+		       unsigned int symindex,
+		       unsigned int relsec,
+		       struct module *mod)
+{
+	unsigned int i;
+	Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr;
+	Elf32_Sym *sym;
+	unsigned char *location;
+	uint32_t value;
+
+	pr_debug("Applying relocate section %u to %u\n", relsec,
+		 sechdrs[relsec].sh_info);
+
+	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rela); i++) {
+		location = (char *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+			+ rela[i].r_offset;
+		sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
+			+ ELF32_R_SYM(rela[i].r_info);
+		value = sym->st_value + rela[i].r_addend;
+
+		switch (ELF32_R_TYPE(rela[i].r_info)) {
+		case R_XTENSA_NONE:
+		case R_XTENSA_DIFF8:
+		case R_XTENSA_DIFF16:
+		case R_XTENSA_DIFF32:
+		case R_XTENSA_ASM_EXPAND:
+			break;
+
+		case R_XTENSA_32:
+		case R_XTENSA_PLT:
+			*(uint32_t *)location += value;
+			break;
+
+		case R_XTENSA_SLOT0_OP:
+			if (decode_calln_opcode(location)) {
+				value -= ((unsigned long)location & -4) + 4;
+				if ((value & 3) != 0 ||
+				    ((value + (1 << 19)) >> 20) != 0) {
+					pr_err("%s: relocation out of range, "
+					       "section %d reloc %d "
+					       "sym '%s'\n",
+					       mod->name, relsec, i,
+					       strtab + sym->st_name);
+					return -ENOEXEC;
+				}
+				value = (signed int)value >> 2;
+#ifdef __XTENSA_EB__
+				location[0] = ((location[0] & ~0x3) |
+					    ((value >> 16) & 0x3));
+				location[1] = (value >> 8) & 0xff;
+				location[2] = value & 0xff;
+#endif
+#ifdef __XTENSA_EL__
+				location[0] = ((location[0] & ~0xc0) |
+					    ((value << 6) & 0xc0));
+				location[1] = (value >> 2) & 0xff;
+				location[2] = (value >> 10) & 0xff;
+#endif
+			} else if (decode_l32r_opcode(location)) {
+				value -= (((unsigned long)location + 3) & -4);
+				if ((value & 3) != 0 ||
+				    (signed int)value >> 18 != -1) {
+					pr_err("%s: relocation out of range, "
+					       "section %d reloc %d "
+					       "sym '%s'\n",
+					       mod->name, relsec, i,
+					       strtab + sym->st_name);
+					return -ENOEXEC;
+				}
+				value = (signed int)value >> 2;
+
+#ifdef __XTENSA_EB__
+				location[1] = (value >> 8) & 0xff;
+				location[2] = value & 0xff;
+#endif
+#ifdef __XTENSA_EL__
+				location[1] = value & 0xff;
+				location[2] = (value >> 8) & 0xff;
+#endif
+			}
+			/* FIXME: Ignore any other opcodes.  The Xtensa
+			   assembler currently assumes that the linker will
+			   always do relaxation and so all PC-relative
+			   operands need relocations.  (The assembler also
+			   writes out the tentative PC-relative values,
+			   assuming no link-time relaxation, so it is usually
+			   safe to ignore the relocations.)  If the
+			   assembler's "--no-link-relax" flag can be made to
+			   work, and if all kernel modules can be assembled
+			   with that flag, then unexpected relocations could
+			   be detected here.  */
+			break;
+
+		case R_XTENSA_SLOT1_OP:
+		case R_XTENSA_SLOT2_OP:
+		case R_XTENSA_SLOT3_OP:
+		case R_XTENSA_SLOT4_OP:
+		case R_XTENSA_SLOT5_OP:
+		case R_XTENSA_SLOT6_OP:
+		case R_XTENSA_SLOT7_OP:
+		case R_XTENSA_SLOT8_OP:
+		case R_XTENSA_SLOT9_OP:
+		case R_XTENSA_SLOT10_OP:
+		case R_XTENSA_SLOT11_OP:
+		case R_XTENSA_SLOT12_OP:
+		case R_XTENSA_SLOT13_OP:
+		case R_XTENSA_SLOT14_OP:
+			pr_err("%s: unexpected FLIX relocation: %u\n",
+			       mod->name,
+			       ELF32_R_TYPE(rela[i].r_info));
+			return -ENOEXEC;
+
+		case R_XTENSA_SLOT0_ALT:
+		case R_XTENSA_SLOT1_ALT:
+		case R_XTENSA_SLOT2_ALT:
+		case R_XTENSA_SLOT3_ALT:
+		case R_XTENSA_SLOT4_ALT:
+		case R_XTENSA_SLOT5_ALT:
+		case R_XTENSA_SLOT6_ALT:
+		case R_XTENSA_SLOT7_ALT:
+		case R_XTENSA_SLOT8_ALT:
+		case R_XTENSA_SLOT9_ALT:
+		case R_XTENSA_SLOT10_ALT:
+		case R_XTENSA_SLOT11_ALT:
+		case R_XTENSA_SLOT12_ALT:
+		case R_XTENSA_SLOT13_ALT:
+		case R_XTENSA_SLOT14_ALT:
+			pr_err("%s: unexpected ALT relocation: %u\n",
+			       mod->name,
+			       ELF32_R_TYPE(rela[i].r_info));
+			return -ENOEXEC;
+
+		default:
+			pr_err("%s: unexpected relocation: %u\n",
+			       mod->name,
+			       ELF32_R_TYPE(rela[i].r_info));
+			return -ENOEXEC;
+		}
+	}
+	return 0;
+}
diff --git a/arch/xtensa/kernel/mxhead.S b/arch/xtensa/kernel/mxhead.S
new file mode 100644
index 000000000..b702c0908
--- /dev/null
+++ b/arch/xtensa/kernel/mxhead.S
@@ -0,0 +1,64 @@
+/*
+ * Xtensa Secondary Processors startup code.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2013 Tensilica Inc.
+ *
+ * Joe Taylor <joe@tensilica.com>
+ * Chris Zankel <chris@zankel.net>
+ * Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca>
+ * Pete Delaney <piet@tensilica.com>
+ */
+
+#include <linux/linkage.h>
+
+#include <asm/cacheasm.h>
+#include <asm/initialize_mmu.h>
+#include <asm/mxregs.h>
+#include <asm/regs.h>
+
+
+	.section .SecondaryResetVector.text, "ax"
+
+
+ENTRY(_SecondaryResetVector)
+	_j _SetupOCD
+
+	.begin  no-absolute-literals
+	.literal_position
+
+_SetupOCD:
+	/*
+	 * Initialize WB, WS, and clear PS.EXCM (to allow loop instructions).
+	 * Set Interrupt Level just below XCHAL_DEBUGLEVEL to allow
+	 * xt-gdb to single step via DEBUG exceptions received directly
+	 * by ocd.
+	 */
+#if XCHAL_HAVE_WINDOWED
+	movi	a1, 1
+	movi	a0, 0
+	wsr	a1, windowstart
+	wsr	a0, windowbase
+	rsync
+#endif
+
+	movi	a1, LOCKLEVEL
+	wsr	a1, ps
+	rsync
+
+_SetupMMU:
+#ifdef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
+	initialize_mmu
+#endif
+
+	/*
+	 * Start Secondary Processors with NULL pointer to boot params.
+	 */
+	movi	a2, 0				#  a2 == NULL
+	movi	a3, _startup
+	jx	a3
+
+	.end    no-absolute-literals
diff --git a/arch/xtensa/kernel/pci-dma.c b/arch/xtensa/kernel/pci-dma.c
new file mode 100644
index 000000000..94955caa4
--- /dev/null
+++ b/arch/xtensa/kernel/pci-dma.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DMA coherent memory allocation.
+ *
+ * Copyright (C) 2002 - 2005 Tensilica Inc.
+ * Copyright (C) 2015 Cadence Design Systems Inc.
+ *
+ * Based on version for i386.
+ *
+ * Chris Zankel <chris@zankel.net>
+ * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com>
+ */
+
+#include <linux/dma-map-ops.h>
+#include <linux/dma-direct.h>
+#include <linux/gfp.h>
+#include <linux/highmem.h>
+#include <linux/mm.h>
+#include <linux/types.h>
+#include <asm/cacheflush.h>
+#include <asm/io.h>
+#include <asm/platform.h>
+
+static void do_cache_op(phys_addr_t paddr, size_t size,
+			void (*fn)(unsigned long, unsigned long))
+{
+	unsigned long off = paddr & (PAGE_SIZE - 1);
+	unsigned long pfn = PFN_DOWN(paddr);
+	struct page *page = pfn_to_page(pfn);
+
+	if (!PageHighMem(page))
+		fn((unsigned long)phys_to_virt(paddr), size);
+	else
+		while (size > 0) {
+			size_t sz = min_t(size_t, size, PAGE_SIZE - off);
+			void *vaddr = kmap_atomic(page);
+
+			fn((unsigned long)vaddr + off, sz);
+			kunmap_atomic(vaddr);
+			off = 0;
+			++page;
+			size -= sz;
+		}
+}
+
+void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,
+		enum dma_data_direction dir)
+{
+	switch (dir) {
+	case DMA_BIDIRECTIONAL:
+	case DMA_FROM_DEVICE:
+		do_cache_op(paddr, size, __invalidate_dcache_range);
+		break;
+
+	case DMA_NONE:
+		BUG();
+		break;
+
+	default:
+		break;
+	}
+}
+
+void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
+		enum dma_data_direction dir)
+{
+	switch (dir) {
+	case DMA_BIDIRECTIONAL:
+	case DMA_TO_DEVICE:
+		if (XCHAL_DCACHE_IS_WRITEBACK)
+			do_cache_op(paddr, size, __flush_dcache_range);
+		break;
+
+	case DMA_NONE:
+		BUG();
+		break;
+
+	default:
+		break;
+	}
+}
+
+void arch_dma_prep_coherent(struct page *page, size_t size)
+{
+	__invalidate_dcache_range((unsigned long)page_address(page), size);
+}
+
+/*
+ * Memory caching is platform-dependent in noMMU xtensa configurations.
+ * This function should be implemented in platform code in order to enable
+ * coherent DMA memory operations when CONFIG_MMU is not enabled.
+ */
+#ifdef CONFIG_MMU
+void *arch_dma_set_uncached(void *p, size_t size)
+{
+	return p + XCHAL_KSEG_BYPASS_VADDR - XCHAL_KSEG_CACHED_VADDR;
+}
+#endif /* CONFIG_MMU */
diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c
new file mode 100644
index 000000000..62c900e40
--- /dev/null
+++ b/arch/xtensa/kernel/pci.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * arch/xtensa/kernel/pci.c
+ *
+ * PCI bios-type initialisation for PCI machines
+ *
+ * Copyright (C) 2001-2005 Tensilica Inc.
+ *
+ * Based largely on work from Cort (ppc/kernel/pci.c)
+ * IO functions copied from sparc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ */
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/memblock.h>
+
+#include <asm/pci-bridge.h>
+#include <asm/platform.h>
+
+/*
+ * We need to avoid collisions with `mirrored' VGA ports
+ * and other strange ISA hardware, so we always want the
+ * addresses to be allocated in the 0x000-0x0ff region
+ * modulo 0x400.
+ *
+ * Why? Because some silly external IO cards only decode
+ * the low 10 bits of the IO address. The 0x00-0xff region
+ * is reserved for motherboard devices that decode all 16
+ * bits, so it's ok to allocate at, say, 0x2800-0x28ff,
+ * but we want to try to avoid allocating at 0x2900-0x2bff
+ * which might have be mirrored at 0x0100-0x03ff..
+ */
+resource_size_t
+pcibios_align_resource(void *data, const struct resource *res,
+		       resource_size_t size, resource_size_t align)
+{
+	struct pci_dev *dev = data;
+	resource_size_t start = res->start;
+
+	if (res->flags & IORESOURCE_IO) {
+		if (size > 0x100) {
+			pr_err("PCI: I/O Region %s/%d too large (%u bytes)\n",
+					pci_name(dev), dev->resource - res,
+					size);
+		}
+
+		if (start & 0x300)
+			start = (start + 0x3ff) & ~0x3ff;
+	}
+
+	return start;
+}
+
+void pcibios_fixup_bus(struct pci_bus *bus)
+{
+	if (bus->parent) {
+		/* This is a subordinate bridge */
+		pci_read_bridge_bases(bus);
+	}
+}
+
+/*
+ * Platform support for /proc/bus/pci/X/Y mmap()s.
+ *  -- paulus.
+ */
+
+int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma)
+{
+	struct pci_controller *pci_ctrl = (struct pci_controller*) pdev->sysdata;
+	resource_size_t ioaddr = pci_resource_start(pdev, bar);
+
+	if (!pci_ctrl)
+		return -EINVAL;		/* should never happen */
+
+	/* Convert to an offset within this PCI controller */
+	ioaddr -= (unsigned long)pci_ctrl->io_space.base;
+
+	vma->vm_pgoff += (ioaddr + pci_ctrl->io_space.start) >> PAGE_SHIFT;
+	return 0;
+}
diff --git a/arch/xtensa/kernel/perf_event.c b/arch/xtensa/kernel/perf_event.c
new file mode 100644
index 000000000..183618090
--- /dev/null
+++ b/arch/xtensa/kernel/perf_event.c
@@ -0,0 +1,450 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Xtensa Performance Monitor Module driver
+ * See Tensilica Debug User's Guide for PMU registers documentation.
+ *
+ * Copyright (C) 2015 Cadence Design Systems Inc.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/perf_event.h>
+#include <linux/platform_device.h>
+
+#include <asm/core.h>
+#include <asm/processor.h>
+#include <asm/stacktrace.h>
+
+#define XTENSA_HWVERSION_RG_2015_0	260000
+
+#if XCHAL_HW_MIN_VERSION >= XTENSA_HWVERSION_RG_2015_0
+#define XTENSA_PMU_ERI_BASE		0x00101000
+#else
+#define XTENSA_PMU_ERI_BASE		0x00001000
+#endif
+
+/* Global control/status for all perf counters */
+#define XTENSA_PMU_PMG			XTENSA_PMU_ERI_BASE
+/* Perf counter values */
+#define XTENSA_PMU_PM(i)		(XTENSA_PMU_ERI_BASE + 0x80 + (i) * 4)
+/* Perf counter control registers */
+#define XTENSA_PMU_PMCTRL(i)		(XTENSA_PMU_ERI_BASE + 0x100 + (i) * 4)
+/* Perf counter status registers */
+#define XTENSA_PMU_PMSTAT(i)		(XTENSA_PMU_ERI_BASE + 0x180 + (i) * 4)
+
+#define XTENSA_PMU_PMG_PMEN		0x1
+
+#define XTENSA_PMU_COUNTER_MASK		0xffffffffULL
+#define XTENSA_PMU_COUNTER_MAX		0x7fffffff
+
+#define XTENSA_PMU_PMCTRL_INTEN		0x00000001
+#define XTENSA_PMU_PMCTRL_KRNLCNT	0x00000008
+#define XTENSA_PMU_PMCTRL_TRACELEVEL	0x000000f0
+#define XTENSA_PMU_PMCTRL_SELECT_SHIFT	8
+#define XTENSA_PMU_PMCTRL_SELECT	0x00001f00
+#define XTENSA_PMU_PMCTRL_MASK_SHIFT	16
+#define XTENSA_PMU_PMCTRL_MASK		0xffff0000
+
+#define XTENSA_PMU_MASK(select, mask) \
+	(((select) << XTENSA_PMU_PMCTRL_SELECT_SHIFT) | \
+	 ((mask) << XTENSA_PMU_PMCTRL_MASK_SHIFT) | \
+	 XTENSA_PMU_PMCTRL_TRACELEVEL | \
+	 XTENSA_PMU_PMCTRL_INTEN)
+
+#define XTENSA_PMU_PMSTAT_OVFL		0x00000001
+#define XTENSA_PMU_PMSTAT_INTASRT	0x00000010
+
+struct xtensa_pmu_events {
+	/* Array of events currently on this core */
+	struct perf_event *event[XCHAL_NUM_PERF_COUNTERS];
+	/* Bitmap of used hardware counters */
+	unsigned long used_mask[BITS_TO_LONGS(XCHAL_NUM_PERF_COUNTERS)];
+};
+static DEFINE_PER_CPU(struct xtensa_pmu_events, xtensa_pmu_events);
+
+static const u32 xtensa_hw_ctl[] = {
+	[PERF_COUNT_HW_CPU_CYCLES]		= XTENSA_PMU_MASK(0, 0x1),
+	[PERF_COUNT_HW_INSTRUCTIONS]		= XTENSA_PMU_MASK(2, 0xffff),
+	[PERF_COUNT_HW_CACHE_REFERENCES]	= XTENSA_PMU_MASK(10, 0x1),
+	[PERF_COUNT_HW_CACHE_MISSES]		= XTENSA_PMU_MASK(12, 0x1),
+	/* Taken and non-taken branches + taken loop ends */
+	[PERF_COUNT_HW_BRANCH_INSTRUCTIONS]	= XTENSA_PMU_MASK(2, 0x490),
+	/* Instruction-related + other global stall cycles */
+	[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND]	= XTENSA_PMU_MASK(4, 0x1ff),
+	/* Data-related global stall cycles */
+	[PERF_COUNT_HW_STALLED_CYCLES_BACKEND]	= XTENSA_PMU_MASK(3, 0x1ff),
+};
+
+#define C(_x) PERF_COUNT_HW_CACHE_##_x
+
+static const u32 xtensa_cache_ctl[][C(OP_MAX)][C(RESULT_MAX)] = {
+	[C(L1D)] = {
+		[C(OP_READ)] = {
+			[C(RESULT_ACCESS)]	= XTENSA_PMU_MASK(10, 0x1),
+			[C(RESULT_MISS)]	= XTENSA_PMU_MASK(10, 0x2),
+		},
+		[C(OP_WRITE)] = {
+			[C(RESULT_ACCESS)]	= XTENSA_PMU_MASK(11, 0x1),
+			[C(RESULT_MISS)]	= XTENSA_PMU_MASK(11, 0x2),
+		},
+	},
+	[C(L1I)] = {
+		[C(OP_READ)] = {
+			[C(RESULT_ACCESS)]	= XTENSA_PMU_MASK(8, 0x1),
+			[C(RESULT_MISS)]	= XTENSA_PMU_MASK(8, 0x2),
+		},
+	},
+	[C(DTLB)] = {
+		[C(OP_READ)] = {
+			[C(RESULT_ACCESS)]	= XTENSA_PMU_MASK(9, 0x1),
+			[C(RESULT_MISS)]	= XTENSA_PMU_MASK(9, 0x8),
+		},
+	},
+	[C(ITLB)] = {
+		[C(OP_READ)] = {
+			[C(RESULT_ACCESS)]	= XTENSA_PMU_MASK(7, 0x1),
+			[C(RESULT_MISS)]	= XTENSA_PMU_MASK(7, 0x8),
+		},
+	},
+};
+
+static int xtensa_pmu_cache_event(u64 config)
+{
+	unsigned int cache_type, cache_op, cache_result;
+	int ret;
+
+	cache_type = (config >>  0) & 0xff;
+	cache_op = (config >>  8) & 0xff;
+	cache_result = (config >> 16) & 0xff;
+
+	if (cache_type >= ARRAY_SIZE(xtensa_cache_ctl) ||
+	    cache_op >= C(OP_MAX) ||
+	    cache_result >= C(RESULT_MAX))
+		return -EINVAL;
+
+	ret = xtensa_cache_ctl[cache_type][cache_op][cache_result];
+
+	if (ret == 0)
+		return -EINVAL;
+
+	return ret;
+}
+
+static inline uint32_t xtensa_pmu_read_counter(int idx)
+{
+	return get_er(XTENSA_PMU_PM(idx));
+}
+
+static inline void xtensa_pmu_write_counter(int idx, uint32_t v)
+{
+	set_er(v, XTENSA_PMU_PM(idx));
+}
+
+static void xtensa_perf_event_update(struct perf_event *event,
+				     struct hw_perf_event *hwc, int idx)
+{
+	uint64_t prev_raw_count, new_raw_count;
+	int64_t delta;
+
+	do {
+		prev_raw_count = local64_read(&hwc->prev_count);
+		new_raw_count = xtensa_pmu_read_counter(event->hw.idx);
+	} while (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
+				 new_raw_count) != prev_raw_count);
+
+	delta = (new_raw_count - prev_raw_count) & XTENSA_PMU_COUNTER_MASK;
+
+	local64_add(delta, &event->count);
+	local64_sub(delta, &hwc->period_left);
+}
+
+static bool xtensa_perf_event_set_period(struct perf_event *event,
+					 struct hw_perf_event *hwc, int idx)
+{
+	bool rc = false;
+	s64 left;
+
+	if (!is_sampling_event(event)) {
+		left = XTENSA_PMU_COUNTER_MAX;
+	} else {
+		s64 period = hwc->sample_period;
+
+		left = local64_read(&hwc->period_left);
+		if (left <= -period) {
+			left = period;
+			local64_set(&hwc->period_left, left);
+			hwc->last_period = period;
+			rc = true;
+		} else if (left <= 0) {
+			left += period;
+			local64_set(&hwc->period_left, left);
+			hwc->last_period = period;
+			rc = true;
+		}
+		if (left > XTENSA_PMU_COUNTER_MAX)
+			left = XTENSA_PMU_COUNTER_MAX;
+	}
+
+	local64_set(&hwc->prev_count, -left);
+	xtensa_pmu_write_counter(idx, -left);
+	perf_event_update_userpage(event);
+
+	return rc;
+}
+
+static void xtensa_pmu_enable(struct pmu *pmu)
+{
+	set_er(get_er(XTENSA_PMU_PMG) | XTENSA_PMU_PMG_PMEN, XTENSA_PMU_PMG);
+}
+
+static void xtensa_pmu_disable(struct pmu *pmu)
+{
+	set_er(get_er(XTENSA_PMU_PMG) & ~XTENSA_PMU_PMG_PMEN, XTENSA_PMU_PMG);
+}
+
+static int xtensa_pmu_event_init(struct perf_event *event)
+{
+	int ret;
+
+	switch (event->attr.type) {
+	case PERF_TYPE_HARDWARE:
+		if (event->attr.config >= ARRAY_SIZE(xtensa_hw_ctl) ||
+		    xtensa_hw_ctl[event->attr.config] == 0)
+			return -EINVAL;
+		event->hw.config = xtensa_hw_ctl[event->attr.config];
+		return 0;
+
+	case PERF_TYPE_HW_CACHE:
+		ret = xtensa_pmu_cache_event(event->attr.config);
+		if (ret < 0)
+			return ret;
+		event->hw.config = ret;
+		return 0;
+
+	case PERF_TYPE_RAW:
+		/* Not 'previous counter' select */
+		if ((event->attr.config & XTENSA_PMU_PMCTRL_SELECT) ==
+		    (1 << XTENSA_PMU_PMCTRL_SELECT_SHIFT))
+			return -EINVAL;
+		event->hw.config = (event->attr.config &
+				    (XTENSA_PMU_PMCTRL_KRNLCNT |
+				     XTENSA_PMU_PMCTRL_TRACELEVEL |
+				     XTENSA_PMU_PMCTRL_SELECT |
+				     XTENSA_PMU_PMCTRL_MASK)) |
+			XTENSA_PMU_PMCTRL_INTEN;
+		return 0;
+
+	default:
+		return -ENOENT;
+	}
+}
+
+/*
+ * Starts/Stops a counter present on the PMU. The PMI handler
+ * should stop the counter when perf_event_overflow() returns
+ * !0. ->start() will be used to continue.
+ */
+static void xtensa_pmu_start(struct perf_event *event, int flags)
+{
+	struct hw_perf_event *hwc = &event->hw;
+	int idx = hwc->idx;
+
+	if (WARN_ON_ONCE(idx == -1))
+		return;
+
+	if (flags & PERF_EF_RELOAD) {
+		WARN_ON_ONCE(!(event->hw.state & PERF_HES_UPTODATE));
+		xtensa_perf_event_set_period(event, hwc, idx);
+	}
+
+	hwc->state = 0;
+
+	set_er(hwc->config, XTENSA_PMU_PMCTRL(idx));
+}
+
+static void xtensa_pmu_stop(struct perf_event *event, int flags)
+{
+	struct hw_perf_event *hwc = &event->hw;
+	int idx = hwc->idx;
+
+	if (!(hwc->state & PERF_HES_STOPPED)) {
+		set_er(0, XTENSA_PMU_PMCTRL(idx));
+		set_er(get_er(XTENSA_PMU_PMSTAT(idx)),
+		       XTENSA_PMU_PMSTAT(idx));
+		hwc->state |= PERF_HES_STOPPED;
+	}
+
+	if ((flags & PERF_EF_UPDATE) &&
+	    !(event->hw.state & PERF_HES_UPTODATE)) {
+		xtensa_perf_event_update(event, &event->hw, idx);
+		event->hw.state |= PERF_HES_UPTODATE;
+	}
+}
+
+/*
+ * Adds/Removes a counter to/from the PMU, can be done inside
+ * a transaction, see the ->*_txn() methods.
+ */
+static int xtensa_pmu_add(struct perf_event *event, int flags)
+{
+	struct xtensa_pmu_events *ev = this_cpu_ptr(&xtensa_pmu_events);
+	struct hw_perf_event *hwc = &event->hw;
+	int idx = hwc->idx;
+
+	if (__test_and_set_bit(idx, ev->used_mask)) {
+		idx = find_first_zero_bit(ev->used_mask,
+					  XCHAL_NUM_PERF_COUNTERS);
+		if (idx == XCHAL_NUM_PERF_COUNTERS)
+			return -EAGAIN;
+
+		__set_bit(idx, ev->used_mask);
+		hwc->idx = idx;
+	}
+	ev->event[idx] = event;
+
+	hwc->state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
+
+	if (flags & PERF_EF_START)
+		xtensa_pmu_start(event, PERF_EF_RELOAD);
+
+	perf_event_update_userpage(event);
+	return 0;
+}
+
+static void xtensa_pmu_del(struct perf_event *event, int flags)
+{
+	struct xtensa_pmu_events *ev = this_cpu_ptr(&xtensa_pmu_events);
+
+	xtensa_pmu_stop(event, PERF_EF_UPDATE);
+	__clear_bit(event->hw.idx, ev->used_mask);
+	perf_event_update_userpage(event);
+}
+
+static void xtensa_pmu_read(struct perf_event *event)
+{
+	xtensa_perf_event_update(event, &event->hw, event->hw.idx);
+}
+
+static int callchain_trace(struct stackframe *frame, void *data)
+{
+	struct perf_callchain_entry_ctx *entry = data;
+
+	perf_callchain_store(entry, frame->pc);
+	return 0;
+}
+
+void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry,
+			   struct pt_regs *regs)
+{
+	xtensa_backtrace_kernel(regs, entry->max_stack,
+				callchain_trace, NULL, entry);
+}
+
+void perf_callchain_user(struct perf_callchain_entry_ctx *entry,
+			 struct pt_regs *regs)
+{
+	xtensa_backtrace_user(regs, entry->max_stack,
+			      callchain_trace, entry);
+}
+
+void perf_event_print_debug(void)
+{
+	unsigned long flags;
+	unsigned i;
+
+	local_irq_save(flags);
+	pr_info("CPU#%d: PMG: 0x%08lx\n", smp_processor_id(),
+		get_er(XTENSA_PMU_PMG));
+	for (i = 0; i < XCHAL_NUM_PERF_COUNTERS; ++i)
+		pr_info("PM%d: 0x%08lx, PMCTRL%d: 0x%08lx, PMSTAT%d: 0x%08lx\n",
+			i, get_er(XTENSA_PMU_PM(i)),
+			i, get_er(XTENSA_PMU_PMCTRL(i)),
+			i, get_er(XTENSA_PMU_PMSTAT(i)));
+	local_irq_restore(flags);
+}
+
+irqreturn_t xtensa_pmu_irq_handler(int irq, void *dev_id)
+{
+	irqreturn_t rc = IRQ_NONE;
+	struct xtensa_pmu_events *ev = this_cpu_ptr(&xtensa_pmu_events);
+	unsigned i;
+
+	for_each_set_bit(i, ev->used_mask, XCHAL_NUM_PERF_COUNTERS) {
+		uint32_t v = get_er(XTENSA_PMU_PMSTAT(i));
+		struct perf_event *event = ev->event[i];
+		struct hw_perf_event *hwc = &event->hw;
+		u64 last_period;
+
+		if (!(v & XTENSA_PMU_PMSTAT_OVFL))
+			continue;
+
+		set_er(v, XTENSA_PMU_PMSTAT(i));
+		xtensa_perf_event_update(event, hwc, i);
+		last_period = hwc->last_period;
+		if (xtensa_perf_event_set_period(event, hwc, i)) {
+			struct perf_sample_data data;
+			struct pt_regs *regs = get_irq_regs();
+
+			perf_sample_data_init(&data, 0, last_period);
+			if (perf_event_overflow(event, &data, regs))
+				xtensa_pmu_stop(event, 0);
+		}
+
+		rc = IRQ_HANDLED;
+	}
+	return rc;
+}
+
+static struct pmu xtensa_pmu = {
+	.pmu_enable = xtensa_pmu_enable,
+	.pmu_disable = xtensa_pmu_disable,
+	.event_init = xtensa_pmu_event_init,
+	.add = xtensa_pmu_add,
+	.del = xtensa_pmu_del,
+	.start = xtensa_pmu_start,
+	.stop = xtensa_pmu_stop,
+	.read = xtensa_pmu_read,
+};
+
+static int xtensa_pmu_setup(unsigned int cpu)
+{
+	unsigned i;
+
+	set_er(0, XTENSA_PMU_PMG);
+	for (i = 0; i < XCHAL_NUM_PERF_COUNTERS; ++i) {
+		set_er(0, XTENSA_PMU_PMCTRL(i));
+		set_er(get_er(XTENSA_PMU_PMSTAT(i)), XTENSA_PMU_PMSTAT(i));
+	}
+	return 0;
+}
+
+static int __init xtensa_pmu_init(void)
+{
+	int ret;
+	int irq = irq_create_mapping(NULL, XCHAL_PROFILING_INTERRUPT);
+
+	ret = cpuhp_setup_state(CPUHP_AP_PERF_XTENSA_STARTING,
+				"perf/xtensa:starting", xtensa_pmu_setup,
+				NULL);
+	if (ret) {
+		pr_err("xtensa_pmu: failed to register CPU-hotplug.\n");
+		return ret;
+	}
+#if XTENSA_FAKE_NMI
+	enable_irq(irq);
+#else
+	ret = request_irq(irq, xtensa_pmu_irq_handler, IRQF_PERCPU,
+			  "pmu", NULL);
+	if (ret < 0)
+		return ret;
+#endif
+
+	ret = perf_pmu_register(&xtensa_pmu, "cpu", PERF_TYPE_RAW);
+	if (ret)
+		free_irq(irq, NULL);
+
+	return ret;
+}
+early_initcall(xtensa_pmu_init);
diff --git a/arch/xtensa/kernel/platform.c b/arch/xtensa/kernel/platform.c
new file mode 100644
index 000000000..ac1e0e566
--- /dev/null
+++ b/arch/xtensa/kernel/platform.c
@@ -0,0 +1,43 @@
+/*
+ * arch/xtensa/kernel/platform.c
+ *
+ * Default platform functions.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2005 Tensilica Inc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ */
+
+#include <linux/printk.h>
+#include <linux/types.h>
+#include <asm/platform.h>
+#include <asm/timex.h>
+
+#define _F(r,f,a,b)							\
+	r __platform_##f a b;                                   	\
+	r platform_##f a __attribute__((weak, alias("__platform_"#f)))
+
+/*
+ * Default functions that are used if no platform specific function is defined.
+ * (Please, refer to include/asm-xtensa/platform.h for more information)
+ */
+
+_F(void, init, (bp_tag_t *first), { });
+_F(void, setup, (char** cmd), { });
+_F(void, restart, (void), { while(1); });
+_F(void, halt, (void), { while(1); });
+_F(void, power_off, (void), { while(1); });
+_F(void, idle, (void), { __asm__ __volatile__ ("waiti 0" ::: "memory"); });
+_F(void, heartbeat, (void), { });
+
+#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
+_F(void, calibrate_ccount, (void),
+{
+	pr_err("ERROR: Cannot calibrate cpu frequency! Assuming 10MHz.\n");
+	ccount_freq = 10 * 1000000UL;
+});
+#endif
diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c
new file mode 100644
index 000000000..68e0e2f06
--- /dev/null
+++ b/arch/xtensa/kernel/process.c
@@ -0,0 +1,398 @@
+/*
+ * arch/xtensa/kernel/process.c
+ *
+ * Xtensa Processor version.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ *
+ * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com>
+ * Chris Zankel <chris@zankel.net>
+ * Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca>
+ * Kevin Chea
+ */
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/sched/debug.h>
+#include <linux/sched/task.h>
+#include <linux/sched/task_stack.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/elf.h>
+#include <linux/hw_breakpoint.h>
+#include <linux/init.h>
+#include <linux/prctl.h>
+#include <linux/init_task.h>
+#include <linux/module.h>
+#include <linux/mqueue.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/rcupdate.h>
+
+#include <linux/uaccess.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <asm/platform.h>
+#include <asm/mmu.h>
+#include <asm/irq.h>
+#include <linux/atomic.h>
+#include <asm/asm-offsets.h>
+#include <asm/regs.h>
+#include <asm/hw_breakpoint.h>
+#include <asm/traps.h>
+
+extern void ret_from_fork(void);
+extern void ret_from_kernel_thread(void);
+
+void (*pm_power_off)(void) = NULL;
+EXPORT_SYMBOL(pm_power_off);
+
+
+#ifdef CONFIG_STACKPROTECTOR
+#include <linux/stackprotector.h>
+unsigned long __stack_chk_guard __read_mostly;
+EXPORT_SYMBOL(__stack_chk_guard);
+#endif
+
+#if XTENSA_HAVE_COPROCESSORS
+
+void local_coprocessors_flush_release_all(void)
+{
+	struct thread_info **coprocessor_owner;
+	struct thread_info *unique_owner[XCHAL_CP_MAX];
+	int n = 0;
+	int i, j;
+
+	coprocessor_owner = this_cpu_ptr(&exc_table)->coprocessor_owner;
+	xtensa_set_sr(XCHAL_CP_MASK, cpenable);
+
+	for (i = 0; i < XCHAL_CP_MAX; i++) {
+		struct thread_info *ti = coprocessor_owner[i];
+
+		if (ti) {
+			coprocessor_flush(ti, i);
+
+			for (j = 0; j < n; j++)
+				if (unique_owner[j] == ti)
+					break;
+			if (j == n)
+				unique_owner[n++] = ti;
+
+			coprocessor_owner[i] = NULL;
+		}
+	}
+	for (i = 0; i < n; i++) {
+		/* pairs with memw (1) in fast_coprocessor and memw in switch_to */
+		smp_wmb();
+		unique_owner[i]->cpenable = 0;
+	}
+	xtensa_set_sr(0, cpenable);
+}
+
+static void local_coprocessor_release_all(void *info)
+{
+	struct thread_info *ti = info;
+	struct thread_info **coprocessor_owner;
+	int i;
+
+	coprocessor_owner = this_cpu_ptr(&exc_table)->coprocessor_owner;
+
+	/* Walk through all cp owners and release it for the requested one. */
+
+	for (i = 0; i < XCHAL_CP_MAX; i++) {
+		if (coprocessor_owner[i] == ti)
+			coprocessor_owner[i] = NULL;
+	}
+	/* pairs with memw (1) in fast_coprocessor and memw in switch_to */
+	smp_wmb();
+	ti->cpenable = 0;
+	if (ti == current_thread_info())
+		xtensa_set_sr(0, cpenable);
+}
+
+void coprocessor_release_all(struct thread_info *ti)
+{
+	if (ti->cpenable) {
+		/* pairs with memw (2) in fast_coprocessor */
+		smp_rmb();
+		smp_call_function_single(ti->cp_owner_cpu,
+					 local_coprocessor_release_all,
+					 ti, true);
+	}
+}
+
+static void local_coprocessor_flush_all(void *info)
+{
+	struct thread_info *ti = info;
+	struct thread_info **coprocessor_owner;
+	unsigned long old_cpenable;
+	int i;
+
+	coprocessor_owner = this_cpu_ptr(&exc_table)->coprocessor_owner;
+	old_cpenable = xtensa_xsr(ti->cpenable, cpenable);
+
+	for (i = 0; i < XCHAL_CP_MAX; i++) {
+		if (coprocessor_owner[i] == ti)
+			coprocessor_flush(ti, i);
+	}
+	xtensa_set_sr(old_cpenable, cpenable);
+}
+
+void coprocessor_flush_all(struct thread_info *ti)
+{
+	if (ti->cpenable) {
+		/* pairs with memw (2) in fast_coprocessor */
+		smp_rmb();
+		smp_call_function_single(ti->cp_owner_cpu,
+					 local_coprocessor_flush_all,
+					 ti, true);
+	}
+}
+
+static void local_coprocessor_flush_release_all(void *info)
+{
+	local_coprocessor_flush_all(info);
+	local_coprocessor_release_all(info);
+}
+
+void coprocessor_flush_release_all(struct thread_info *ti)
+{
+	if (ti->cpenable) {
+		/* pairs with memw (2) in fast_coprocessor */
+		smp_rmb();
+		smp_call_function_single(ti->cp_owner_cpu,
+					 local_coprocessor_flush_release_all,
+					 ti, true);
+	}
+}
+
+#endif
+
+
+/*
+ * Powermanagement idle function, if any is provided by the platform.
+ */
+void arch_cpu_idle(void)
+{
+	platform_idle();
+}
+
+/*
+ * This is called when the thread calls exit().
+ */
+void exit_thread(struct task_struct *tsk)
+{
+#if XTENSA_HAVE_COPROCESSORS
+	coprocessor_release_all(task_thread_info(tsk));
+#endif
+}
+
+/*
+ * Flush thread state. This is called when a thread does an execve()
+ * Note that we flush coprocessor registers for the case execve fails.
+ */
+void flush_thread(void)
+{
+#if XTENSA_HAVE_COPROCESSORS
+	struct thread_info *ti = current_thread_info();
+	coprocessor_flush_release_all(ti);
+#endif
+	flush_ptrace_hw_breakpoint(current);
+}
+
+/*
+ * this gets called so that we can store coprocessor state into memory and
+ * copy the current task into the new thread.
+ */
+int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
+{
+#if XTENSA_HAVE_COPROCESSORS
+	coprocessor_flush_all(task_thread_info(src));
+#endif
+	*dst = *src;
+	return 0;
+}
+
+/*
+ * Copy thread.
+ *
+ * There are two modes in which this function is called:
+ * 1) Userspace thread creation,
+ *    regs != NULL, usp_thread_fn is userspace stack pointer.
+ *    It is expected to copy parent regs (in case CLONE_VM is not set
+ *    in the clone_flags) and set up passed usp in the childregs.
+ * 2) Kernel thread creation,
+ *    regs == NULL, usp_thread_fn is the function to run in the new thread
+ *    and thread_fn_arg is its parameter.
+ *    childregs are not used for the kernel threads.
+ *
+ * The stack layout for the new thread looks like this:
+ *
+ *	+------------------------+
+ *	|       childregs        |
+ *	+------------------------+ <- thread.sp = sp in dummy-frame
+ *	|      dummy-frame       |    (saved in dummy-frame spill-area)
+ *	+------------------------+
+ *
+ * We create a dummy frame to return to either ret_from_fork or
+ *   ret_from_kernel_thread:
+ *   a0 points to ret_from_fork/ret_from_kernel_thread (simulating a call4)
+ *   sp points to itself (thread.sp)
+ *   a2, a3 are unused for userspace threads,
+ *   a2 points to thread_fn, a3 holds thread_fn arg for kernel threads.
+ *
+ * Note: This is a pristine frame, so we don't need any spill region on top of
+ *       childregs.
+ *
+ * The fun part:  if we're keeping the same VM (i.e. cloning a thread,
+ * not an entire process), we're normally given a new usp, and we CANNOT share
+ * any live address register windows.  If we just copy those live frames over,
+ * the two threads (parent and child) will overflow the same frames onto the
+ * parent stack at different times, likely corrupting the parent stack (esp.
+ * if the parent returns from functions that called clone() and calls new
+ * ones, before the child overflows its now old copies of its parent windows).
+ * One solution is to spill windows to the parent stack, but that's fairly
+ * involved.  Much simpler to just not copy those live frames across.
+ */
+
+int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
+{
+	unsigned long clone_flags = args->flags;
+	unsigned long usp_thread_fn = args->stack;
+	unsigned long tls = args->tls;
+	struct pt_regs *childregs = task_pt_regs(p);
+
+#if (XTENSA_HAVE_COPROCESSORS || XTENSA_HAVE_IO_PORTS)
+	struct thread_info *ti;
+#endif
+
+#if defined(__XTENSA_WINDOWED_ABI__)
+	/* Create a call4 dummy-frame: a0 = 0, a1 = childregs. */
+	SPILL_SLOT(childregs, 1) = (unsigned long)childregs;
+	SPILL_SLOT(childregs, 0) = 0;
+
+	p->thread.sp = (unsigned long)childregs;
+#elif defined(__XTENSA_CALL0_ABI__)
+	/* Reserve 16 bytes for the _switch_to stack frame. */
+	p->thread.sp = (unsigned long)childregs - 16;
+#else
+#error Unsupported Xtensa ABI
+#endif
+
+	if (!args->fn) {
+		struct pt_regs *regs = current_pt_regs();
+		unsigned long usp = usp_thread_fn ?
+			usp_thread_fn : regs->areg[1];
+
+		p->thread.ra = MAKE_RA_FOR_CALL(
+				(unsigned long)ret_from_fork, 0x1);
+
+		*childregs = *regs;
+		childregs->areg[1] = usp;
+		childregs->areg[2] = 0;
+
+		/* When sharing memory with the parent thread, the child
+		   usually starts on a pristine stack, so we have to reset
+		   windowbase, windowstart and wmask.
+		   (Note that such a new thread is required to always create
+		   an initial call4 frame)
+		   The exception is vfork, where the new thread continues to
+		   run on the parent's stack until it calls execve. This could
+		   be a call8 or call12, which requires a legal stack frame
+		   of the previous caller for the overflow handlers to work.
+		   (Note that it's always legal to overflow live registers).
+		   In this case, ensure to spill at least the stack pointer
+		   of that frame. */
+
+		if (clone_flags & CLONE_VM) {
+			/* check that caller window is live and same stack */
+			int len = childregs->wmask & ~0xf;
+			if (regs->areg[1] == usp && len != 0) {
+				int callinc = (regs->areg[0] >> 30) & 3;
+				int caller_ars = XCHAL_NUM_AREGS - callinc * 4;
+				put_user(regs->areg[caller_ars+1],
+					 (unsigned __user*)(usp - 12));
+			}
+			childregs->wmask = 1;
+			childregs->windowstart = 1;
+			childregs->windowbase = 0;
+		}
+
+		if (clone_flags & CLONE_SETTLS)
+			childregs->threadptr = tls;
+	} else {
+		p->thread.ra = MAKE_RA_FOR_CALL(
+				(unsigned long)ret_from_kernel_thread, 1);
+
+		/* pass parameters to ret_from_kernel_thread: */
+#if defined(__XTENSA_WINDOWED_ABI__)
+		/*
+		 * a2 = thread_fn, a3 = thread_fn arg.
+		 * Window underflow will load registers from the
+		 * spill slots on the stack on return from _switch_to.
+		 */
+		SPILL_SLOT(childregs, 2) = (unsigned long)args->fn;
+		SPILL_SLOT(childregs, 3) = (unsigned long)args->fn_arg;
+#elif defined(__XTENSA_CALL0_ABI__)
+		/*
+		 * a12 = thread_fn, a13 = thread_fn arg.
+		 * _switch_to epilogue will load registers from the stack.
+		 */
+		((unsigned long *)p->thread.sp)[0] = (unsigned long)args->fn;
+		((unsigned long *)p->thread.sp)[1] = (unsigned long)args->fn_arg;
+#else
+#error Unsupported Xtensa ABI
+#endif
+
+		/* Childregs are only used when we're going to userspace
+		 * in which case start_thread will set them up.
+		 */
+	}
+
+#if (XTENSA_HAVE_COPROCESSORS || XTENSA_HAVE_IO_PORTS)
+	ti = task_thread_info(p);
+	ti->cpenable = 0;
+#endif
+
+	clear_ptrace_hw_breakpoint(p);
+
+	return 0;
+}
+
+
+/*
+ * These bracket the sleeping functions..
+ */
+
+unsigned long __get_wchan(struct task_struct *p)
+{
+	unsigned long sp, pc;
+	unsigned long stack_page = (unsigned long) task_stack_page(p);
+	int count = 0;
+
+	sp = p->thread.sp;
+	pc = MAKE_PC_FROM_RA(p->thread.ra, p->thread.sp);
+
+	do {
+		if (sp < stack_page + sizeof(struct task_struct) ||
+		    sp >= (stack_page + THREAD_SIZE) ||
+		    pc == 0)
+			return 0;
+		if (!in_sched_functions(pc))
+			return pc;
+
+		/* Stack layout: sp-4: ra, sp-3: sp' */
+
+		pc = MAKE_PC_FROM_RA(SPILL_SLOT(sp, 0), sp);
+		sp = SPILL_SLOT(sp, 1);
+	} while (count++ < 16);
+	return 0;
+}
diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c
new file mode 100644
index 000000000..f29477162
--- /dev/null
+++ b/arch/xtensa/kernel/ptrace.c
@@ -0,0 +1,585 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2007  Tensilica Inc.
+ *
+ * Joe Taylor	<joe@tensilica.com, joetylr@yahoo.com>
+ * Chris Zankel <chris@zankel.net>
+ * Scott Foehner<sfoehner@yahoo.com>,
+ * Kevin Chea
+ * Marc Gauthier<marc@tensilica.com> <marc@alumni.uwaterloo.ca>
+ */
+
+#include <linux/audit.h>
+#include <linux/errno.h>
+#include <linux/hw_breakpoint.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/perf_event.h>
+#include <linux/ptrace.h>
+#include <linux/regset.h>
+#include <linux/sched.h>
+#include <linux/sched/task_stack.h>
+#include <linux/seccomp.h>
+#include <linux/security.h>
+#include <linux/signal.h>
+#include <linux/smp.h>
+#include <linux/uaccess.h>
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/syscalls.h>
+
+#include <asm/coprocessor.h>
+#include <asm/elf.h>
+#include <asm/page.h>
+#include <asm/ptrace.h>
+
+static int gpr_get(struct task_struct *target,
+		   const struct user_regset *regset,
+		   struct membuf to)
+{
+	struct pt_regs *regs = task_pt_regs(target);
+	struct user_pt_regs newregs = {
+		.pc = regs->pc,
+		.ps = regs->ps & ~(1 << PS_EXCM_BIT),
+		.lbeg = regs->lbeg,
+		.lend = regs->lend,
+		.lcount = regs->lcount,
+		.sar = regs->sar,
+		.threadptr = regs->threadptr,
+		.windowbase = regs->windowbase,
+		.windowstart = regs->windowstart,
+		.syscall = regs->syscall,
+	};
+
+	memcpy(newregs.a,
+	       regs->areg + XCHAL_NUM_AREGS - regs->windowbase * 4,
+	       regs->windowbase * 16);
+	memcpy(newregs.a + regs->windowbase * 4,
+	       regs->areg,
+	       (WSBITS - regs->windowbase) * 16);
+
+	return membuf_write(&to, &newregs, sizeof(newregs));
+}
+
+static int gpr_set(struct task_struct *target,
+		   const struct user_regset *regset,
+		   unsigned int pos, unsigned int count,
+		   const void *kbuf, const void __user *ubuf)
+{
+	int ret;
+	struct user_pt_regs newregs = {0};
+	struct pt_regs *regs;
+	const u32 ps_mask = PS_CALLINC_MASK | PS_OWB_MASK;
+
+	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &newregs, 0, -1);
+	if (ret)
+		return ret;
+
+	if (newregs.windowbase >= XCHAL_NUM_AREGS / 4)
+		return -EINVAL;
+
+	regs = task_pt_regs(target);
+	regs->pc = newregs.pc;
+	regs->ps = (regs->ps & ~ps_mask) | (newregs.ps & ps_mask);
+	regs->lbeg = newregs.lbeg;
+	regs->lend = newregs.lend;
+	regs->lcount = newregs.lcount;
+	regs->sar = newregs.sar;
+	regs->threadptr = newregs.threadptr;
+
+	if (newregs.syscall)
+		regs->syscall = newregs.syscall;
+
+	if (newregs.windowbase != regs->windowbase ||
+	    newregs.windowstart != regs->windowstart) {
+		u32 rotws, wmask;
+
+		rotws = (((newregs.windowstart |
+			   (newregs.windowstart << WSBITS)) >>
+			  newregs.windowbase) &
+			 ((1 << WSBITS) - 1)) & ~1;
+		wmask = ((rotws ? WSBITS + 1 - ffs(rotws) : 0) << 4) |
+			(rotws & 0xF) | 1;
+		regs->windowbase = newregs.windowbase;
+		regs->windowstart = newregs.windowstart;
+		regs->wmask = wmask;
+	}
+
+	memcpy(regs->areg + XCHAL_NUM_AREGS - newregs.windowbase * 4,
+	       newregs.a, newregs.windowbase * 16);
+	memcpy(regs->areg, newregs.a + newregs.windowbase * 4,
+	       (WSBITS - newregs.windowbase) * 16);
+
+	return 0;
+}
+
+static int tie_get(struct task_struct *target,
+		   const struct user_regset *regset,
+		   struct membuf to)
+{
+	int ret;
+	struct pt_regs *regs = task_pt_regs(target);
+	struct thread_info *ti = task_thread_info(target);
+	elf_xtregs_t *newregs = kzalloc(sizeof(elf_xtregs_t), GFP_KERNEL);
+
+	if (!newregs)
+		return -ENOMEM;
+
+	newregs->opt = regs->xtregs_opt;
+	newregs->user = ti->xtregs_user;
+
+#if XTENSA_HAVE_COPROCESSORS
+	/* Flush all coprocessor registers to memory. */
+	coprocessor_flush_all(ti);
+	newregs->cp0 = ti->xtregs_cp.cp0;
+	newregs->cp1 = ti->xtregs_cp.cp1;
+	newregs->cp2 = ti->xtregs_cp.cp2;
+	newregs->cp3 = ti->xtregs_cp.cp3;
+	newregs->cp4 = ti->xtregs_cp.cp4;
+	newregs->cp5 = ti->xtregs_cp.cp5;
+	newregs->cp6 = ti->xtregs_cp.cp6;
+	newregs->cp7 = ti->xtregs_cp.cp7;
+#endif
+	ret = membuf_write(&to, newregs, sizeof(*newregs));
+	kfree(newregs);
+	return ret;
+}
+
+static int tie_set(struct task_struct *target,
+		   const struct user_regset *regset,
+		   unsigned int pos, unsigned int count,
+		   const void *kbuf, const void __user *ubuf)
+{
+	int ret;
+	struct pt_regs *regs = task_pt_regs(target);
+	struct thread_info *ti = task_thread_info(target);
+	elf_xtregs_t *newregs = kzalloc(sizeof(elf_xtregs_t), GFP_KERNEL);
+
+	if (!newregs)
+		return -ENOMEM;
+
+	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+				 newregs, 0, -1);
+
+	if (ret)
+		goto exit;
+	regs->xtregs_opt = newregs->opt;
+	ti->xtregs_user = newregs->user;
+
+#if XTENSA_HAVE_COPROCESSORS
+	/* Flush all coprocessors before we overwrite them. */
+	coprocessor_flush_release_all(ti);
+	ti->xtregs_cp.cp0 = newregs->cp0;
+	ti->xtregs_cp.cp1 = newregs->cp1;
+	ti->xtregs_cp.cp2 = newregs->cp2;
+	ti->xtregs_cp.cp3 = newregs->cp3;
+	ti->xtregs_cp.cp4 = newregs->cp4;
+	ti->xtregs_cp.cp5 = newregs->cp5;
+	ti->xtregs_cp.cp6 = newregs->cp6;
+	ti->xtregs_cp.cp7 = newregs->cp7;
+#endif
+exit:
+	kfree(newregs);
+	return ret;
+}
+
+enum xtensa_regset {
+	REGSET_GPR,
+	REGSET_TIE,
+};
+
+static const struct user_regset xtensa_regsets[] = {
+	[REGSET_GPR] = {
+		.core_note_type = NT_PRSTATUS,
+		.n = sizeof(struct user_pt_regs) / sizeof(u32),
+		.size = sizeof(u32),
+		.align = sizeof(u32),
+		.regset_get = gpr_get,
+		.set = gpr_set,
+	},
+	[REGSET_TIE] = {
+		.core_note_type = NT_PRFPREG,
+		.n = sizeof(elf_xtregs_t) / sizeof(u32),
+		.size = sizeof(u32),
+		.align = sizeof(u32),
+		.regset_get = tie_get,
+		.set = tie_set,
+	},
+};
+
+static const struct user_regset_view user_xtensa_view = {
+	.name = "xtensa",
+	.e_machine = EM_XTENSA,
+	.regsets = xtensa_regsets,
+	.n = ARRAY_SIZE(xtensa_regsets)
+};
+
+const struct user_regset_view *task_user_regset_view(struct task_struct *task)
+{
+	return &user_xtensa_view;
+}
+
+void user_enable_single_step(struct task_struct *child)
+{
+	set_tsk_thread_flag(child, TIF_SINGLESTEP);
+}
+
+void user_disable_single_step(struct task_struct *child)
+{
+	clear_tsk_thread_flag(child, TIF_SINGLESTEP);
+}
+
+/*
+ * Called by kernel/ptrace.c when detaching to disable single stepping.
+ */
+
+void ptrace_disable(struct task_struct *child)
+{
+	/* Nothing to do.. */
+}
+
+static int ptrace_getregs(struct task_struct *child, void __user *uregs)
+{
+	return copy_regset_to_user(child, &user_xtensa_view, REGSET_GPR,
+				   0, sizeof(xtensa_gregset_t), uregs);
+}
+
+static int ptrace_setregs(struct task_struct *child, void __user *uregs)
+{
+	return copy_regset_from_user(child, &user_xtensa_view, REGSET_GPR,
+				     0, sizeof(xtensa_gregset_t), uregs);
+}
+
+static int ptrace_getxregs(struct task_struct *child, void __user *uregs)
+{
+	return copy_regset_to_user(child, &user_xtensa_view, REGSET_TIE,
+				   0, sizeof(elf_xtregs_t), uregs);
+}
+
+static int ptrace_setxregs(struct task_struct *child, void __user *uregs)
+{
+	return copy_regset_from_user(child, &user_xtensa_view, REGSET_TIE,
+				     0, sizeof(elf_xtregs_t), uregs);
+}
+
+static int ptrace_peekusr(struct task_struct *child, long regno,
+			  long __user *ret)
+{
+	struct pt_regs *regs;
+	unsigned long tmp;
+
+	regs = task_pt_regs(child);
+	tmp = 0;  /* Default return value. */
+
+	switch(regno) {
+	case REG_AR_BASE ... REG_AR_BASE + XCHAL_NUM_AREGS - 1:
+		tmp = regs->areg[regno - REG_AR_BASE];
+		break;
+
+	case REG_A_BASE ... REG_A_BASE + 15:
+		tmp = regs->areg[regno - REG_A_BASE];
+		break;
+
+	case REG_PC:
+		tmp = regs->pc;
+		break;
+
+	case REG_PS:
+		/* Note: PS.EXCM is not set while user task is running;
+		 * its being set in regs is for exception handling
+		 * convenience.
+		 */
+		tmp = (regs->ps & ~(1 << PS_EXCM_BIT));
+		break;
+
+	case REG_WB:
+		break;		/* tmp = 0 */
+
+	case REG_WS:
+		{
+			unsigned long wb = regs->windowbase;
+			unsigned long ws = regs->windowstart;
+			tmp = ((ws >> wb) | (ws << (WSBITS - wb))) &
+				((1 << WSBITS) - 1);
+			break;
+		}
+	case REG_LBEG:
+		tmp = regs->lbeg;
+		break;
+
+	case REG_LEND:
+		tmp = regs->lend;
+		break;
+
+	case REG_LCOUNT:
+		tmp = regs->lcount;
+		break;
+
+	case REG_SAR:
+		tmp = regs->sar;
+		break;
+
+	case SYSCALL_NR:
+		tmp = regs->syscall;
+		break;
+
+	default:
+		return -EIO;
+	}
+	return put_user(tmp, ret);
+}
+
+static int ptrace_pokeusr(struct task_struct *child, long regno, long val)
+{
+	struct pt_regs *regs;
+	regs = task_pt_regs(child);
+
+	switch (regno) {
+	case REG_AR_BASE ... REG_AR_BASE + XCHAL_NUM_AREGS - 1:
+		regs->areg[regno - REG_AR_BASE] = val;
+		break;
+
+	case REG_A_BASE ... REG_A_BASE + 15:
+		regs->areg[regno - REG_A_BASE] = val;
+		break;
+
+	case REG_PC:
+		regs->pc = val;
+		break;
+
+	case SYSCALL_NR:
+		regs->syscall = val;
+		break;
+
+	default:
+		return -EIO;
+	}
+	return 0;
+}
+
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+static void ptrace_hbptriggered(struct perf_event *bp,
+				struct perf_sample_data *data,
+				struct pt_regs *regs)
+{
+	int i;
+	struct arch_hw_breakpoint *bkpt = counter_arch_bp(bp);
+
+	if (bp->attr.bp_type & HW_BREAKPOINT_X) {
+		for (i = 0; i < XCHAL_NUM_IBREAK; ++i)
+			if (current->thread.ptrace_bp[i] == bp)
+				break;
+		i <<= 1;
+	} else {
+		for (i = 0; i < XCHAL_NUM_DBREAK; ++i)
+			if (current->thread.ptrace_wp[i] == bp)
+				break;
+		i = (i << 1) | 1;
+	}
+
+	force_sig_ptrace_errno_trap(i, (void __user *)bkpt->address);
+}
+
+static struct perf_event *ptrace_hbp_create(struct task_struct *tsk, int type)
+{
+	struct perf_event_attr attr;
+
+	ptrace_breakpoint_init(&attr);
+
+	/* Initialise fields to sane defaults. */
+	attr.bp_addr	= 0;
+	attr.bp_len	= 1;
+	attr.bp_type	= type;
+	attr.disabled	= 1;
+
+	return register_user_hw_breakpoint(&attr, ptrace_hbptriggered, NULL,
+					   tsk);
+}
+
+/*
+ * Address bit 0 choose instruction (0) or data (1) break register, bits
+ * 31..1 are the register number.
+ * Both PTRACE_GETHBPREGS and PTRACE_SETHBPREGS transfer two 32-bit words:
+ * address (0) and control (1).
+ * Instruction breakpoint contorl word is 0 to clear breakpoint, 1 to set.
+ * Data breakpoint control word bit 31 is 'trigger on store', bit 30 is
+ * 'trigger on load, bits 29..0 are length. Length 0 is used to clear a
+ * breakpoint. To set a breakpoint length must be a power of 2 in the range
+ * 1..64 and the address must be length-aligned.
+ */
+
+static long ptrace_gethbpregs(struct task_struct *child, long addr,
+			      long __user *datap)
+{
+	struct perf_event *bp;
+	u32 user_data[2] = {0};
+	bool dbreak = addr & 1;
+	unsigned idx = addr >> 1;
+
+	if ((!dbreak && idx >= XCHAL_NUM_IBREAK) ||
+	    (dbreak && idx >= XCHAL_NUM_DBREAK))
+		return -EINVAL;
+
+	if (dbreak)
+		bp = child->thread.ptrace_wp[idx];
+	else
+		bp = child->thread.ptrace_bp[idx];
+
+	if (bp) {
+		user_data[0] = bp->attr.bp_addr;
+		user_data[1] = bp->attr.disabled ? 0 : bp->attr.bp_len;
+		if (dbreak) {
+			if (bp->attr.bp_type & HW_BREAKPOINT_R)
+				user_data[1] |= DBREAKC_LOAD_MASK;
+			if (bp->attr.bp_type & HW_BREAKPOINT_W)
+				user_data[1] |= DBREAKC_STOR_MASK;
+		}
+	}
+
+	if (copy_to_user(datap, user_data, sizeof(user_data)))
+		return -EFAULT;
+
+	return 0;
+}
+
+static long ptrace_sethbpregs(struct task_struct *child, long addr,
+			      long __user *datap)
+{
+	struct perf_event *bp;
+	struct perf_event_attr attr;
+	u32 user_data[2];
+	bool dbreak = addr & 1;
+	unsigned idx = addr >> 1;
+	int bp_type = 0;
+
+	if ((!dbreak && idx >= XCHAL_NUM_IBREAK) ||
+	    (dbreak && idx >= XCHAL_NUM_DBREAK))
+		return -EINVAL;
+
+	if (copy_from_user(user_data, datap, sizeof(user_data)))
+		return -EFAULT;
+
+	if (dbreak) {
+		bp = child->thread.ptrace_wp[idx];
+		if (user_data[1] & DBREAKC_LOAD_MASK)
+			bp_type |= HW_BREAKPOINT_R;
+		if (user_data[1] & DBREAKC_STOR_MASK)
+			bp_type |= HW_BREAKPOINT_W;
+	} else {
+		bp = child->thread.ptrace_bp[idx];
+		bp_type = HW_BREAKPOINT_X;
+	}
+
+	if (!bp) {
+		bp = ptrace_hbp_create(child,
+				       bp_type ? bp_type : HW_BREAKPOINT_RW);
+		if (IS_ERR(bp))
+			return PTR_ERR(bp);
+		if (dbreak)
+			child->thread.ptrace_wp[idx] = bp;
+		else
+			child->thread.ptrace_bp[idx] = bp;
+	}
+
+	attr = bp->attr;
+	attr.bp_addr = user_data[0];
+	attr.bp_len = user_data[1] & ~(DBREAKC_LOAD_MASK | DBREAKC_STOR_MASK);
+	attr.bp_type = bp_type;
+	attr.disabled = !attr.bp_len;
+
+	return modify_user_hw_breakpoint(bp, &attr);
+}
+#endif
+
+long arch_ptrace(struct task_struct *child, long request,
+		 unsigned long addr, unsigned long data)
+{
+	int ret = -EPERM;
+	void __user *datap = (void __user *) data;
+
+	switch (request) {
+	case PTRACE_PEEKUSR:	/* read register specified by addr. */
+		ret = ptrace_peekusr(child, addr, datap);
+		break;
+
+	case PTRACE_POKEUSR:	/* write register specified by addr. */
+		ret = ptrace_pokeusr(child, addr, data);
+		break;
+
+	case PTRACE_GETREGS:
+		ret = ptrace_getregs(child, datap);
+		break;
+
+	case PTRACE_SETREGS:
+		ret = ptrace_setregs(child, datap);
+		break;
+
+	case PTRACE_GETXTREGS:
+		ret = ptrace_getxregs(child, datap);
+		break;
+
+	case PTRACE_SETXTREGS:
+		ret = ptrace_setxregs(child, datap);
+		break;
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+	case PTRACE_GETHBPREGS:
+		ret = ptrace_gethbpregs(child, addr, datap);
+		break;
+
+	case PTRACE_SETHBPREGS:
+		ret = ptrace_sethbpregs(child, addr, datap);
+		break;
+#endif
+	default:
+		ret = ptrace_request(child, request, addr, data);
+		break;
+	}
+
+	return ret;
+}
+
+void do_syscall_trace_leave(struct pt_regs *regs);
+int do_syscall_trace_enter(struct pt_regs *regs)
+{
+	if (regs->syscall == NO_SYSCALL)
+		regs->areg[2] = -ENOSYS;
+
+	if (test_thread_flag(TIF_SYSCALL_TRACE) &&
+	    ptrace_report_syscall_entry(regs)) {
+		regs->areg[2] = -ENOSYS;
+		regs->syscall = NO_SYSCALL;
+		return 0;
+	}
+
+	if (regs->syscall == NO_SYSCALL ||
+	    secure_computing() == -1) {
+		do_syscall_trace_leave(regs);
+		return 0;
+	}
+
+	if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
+		trace_sys_enter(regs, syscall_get_nr(current, regs));
+
+	audit_syscall_entry(regs->syscall, regs->areg[6],
+			    regs->areg[3], regs->areg[4],
+			    regs->areg[5]);
+	return 1;
+}
+
+void do_syscall_trace_leave(struct pt_regs *regs)
+{
+	int step;
+
+	audit_syscall_exit(regs);
+
+	if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
+		trace_sys_exit(regs, regs_return_value(regs));
+
+	step = test_thread_flag(TIF_SINGLESTEP);
+
+	if (step || test_thread_flag(TIF_SYSCALL_TRACE))
+		ptrace_report_syscall_exit(regs, step);
+}
diff --git a/arch/xtensa/kernel/s32c1i_selftest.c b/arch/xtensa/kernel/s32c1i_selftest.c
new file mode 100644
index 000000000..8362388c8
--- /dev/null
+++ b/arch/xtensa/kernel/s32c1i_selftest.c
@@ -0,0 +1,127 @@
+/*
+ * S32C1I selftest.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2016 Cadence Design Systems Inc.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+
+#include <asm/traps.h>
+
+#if XCHAL_HAVE_S32C1I
+
+static int __initdata rcw_word, rcw_probe_pc, rcw_exc;
+
+/*
+ * Basic atomic compare-and-swap, that records PC of S32C1I for probing.
+ *
+ * If *v == cmp, set *v = set.  Return previous *v.
+ */
+static inline int probed_compare_swap(int *v, int cmp, int set)
+{
+	int tmp;
+
+	__asm__ __volatile__(
+			"	movi	%1, 1f\n"
+			"	s32i	%1, %4, 0\n"
+			"	wsr	%2, scompare1\n"
+			"1:	s32c1i	%0, %3, 0\n"
+			: "=a" (set), "=&a" (tmp)
+			: "a" (cmp), "a" (v), "a" (&rcw_probe_pc), "0" (set)
+			: "memory"
+			);
+	return set;
+}
+
+/* Handle probed exception */
+
+static void __init do_probed_exception(struct pt_regs *regs)
+{
+	if (regs->pc == rcw_probe_pc) {	/* exception on s32c1i ? */
+		regs->pc += 3;		/* skip the s32c1i instruction */
+		rcw_exc = regs->exccause;
+	} else {
+		do_unhandled(regs);
+	}
+}
+
+/* Simple test of S32C1I (soc bringup assist) */
+
+static int __init check_s32c1i(void)
+{
+	int n, cause1, cause2;
+	void *handbus, *handdata, *handaddr; /* temporarily saved handlers */
+
+	rcw_probe_pc = 0;
+	handbus  = trap_set_handler(EXCCAUSE_LOAD_STORE_ERROR,
+			do_probed_exception);
+	handdata = trap_set_handler(EXCCAUSE_LOAD_STORE_DATA_ERROR,
+			do_probed_exception);
+	handaddr = trap_set_handler(EXCCAUSE_LOAD_STORE_ADDR_ERROR,
+			do_probed_exception);
+
+	/* First try an S32C1I that does not store: */
+	rcw_exc = 0;
+	rcw_word = 1;
+	n = probed_compare_swap(&rcw_word, 0, 2);
+	cause1 = rcw_exc;
+
+	/* took exception? */
+	if (cause1 != 0) {
+		/* unclean exception? */
+		if (n != 2 || rcw_word != 1)
+			panic("S32C1I exception error");
+	} else if (rcw_word != 1 || n != 1) {
+		panic("S32C1I compare error");
+	}
+
+	/* Then an S32C1I that stores: */
+	rcw_exc = 0;
+	rcw_word = 0x1234567;
+	n = probed_compare_swap(&rcw_word, 0x1234567, 0xabcde);
+	cause2 = rcw_exc;
+
+	if (cause2 != 0) {
+		/* unclean exception? */
+		if (n != 0xabcde || rcw_word != 0x1234567)
+			panic("S32C1I exception error (b)");
+	} else if (rcw_word != 0xabcde || n != 0x1234567) {
+		panic("S32C1I store error");
+	}
+
+	/* Verify consistency of exceptions: */
+	if (cause1 || cause2) {
+		pr_warn("S32C1I took exception %d, %d\n", cause1, cause2);
+		/* If emulation of S32C1I upon bus error gets implemented,
+		 * we can get rid of this panic for single core (not SMP)
+		 */
+		panic("S32C1I exceptions not currently supported");
+	}
+	if (cause1 != cause2)
+		panic("inconsistent S32C1I exceptions");
+
+	trap_set_handler(EXCCAUSE_LOAD_STORE_ERROR, handbus);
+	trap_set_handler(EXCCAUSE_LOAD_STORE_DATA_ERROR, handdata);
+	trap_set_handler(EXCCAUSE_LOAD_STORE_ADDR_ERROR, handaddr);
+	return 0;
+}
+
+#else /* XCHAL_HAVE_S32C1I */
+
+/* This condition should not occur with a commercially deployed processor.
+ * Display reminder for early engr test or demo chips / FPGA bitstreams
+ */
+static int __init check_s32c1i(void)
+{
+	pr_warn("Processor configuration lacks atomic compare-and-swap support!\n");
+	return 0;
+}
+
+#endif /* XCHAL_HAVE_S32C1I */
+
+early_initcall(check_s32c1i);
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
new file mode 100644
index 000000000..9191738f9
--- /dev/null
+++ b/arch/xtensa/kernel/setup.c
@@ -0,0 +1,704 @@
+/*
+ * arch/xtensa/kernel/setup.c
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1995  Linus Torvalds
+ * Copyright (C) 2001 - 2005  Tensilica Inc.
+ * Copyright (C) 2014 - 2016  Cadence Design Systems Inc.
+ *
+ * Chris Zankel	<chris@zankel.net>
+ * Joe Taylor	<joe@tensilica.com, joetylr@yahoo.com>
+ * Kevin Chea
+ * Marc Gauthier<marc@tensilica.com> <marc@alumni.uwaterloo.ca>
+ */
+
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/proc_fs.h>
+#include <linux/screen_info.h>
+#include <linux/kernel.h>
+#include <linux/percpu.h>
+#include <linux/cpu.h>
+#include <linux/of.h>
+#include <linux/of_fdt.h>
+
+#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
+# include <linux/console.h>
+#endif
+
+#ifdef CONFIG_PROC_FS
+# include <linux/seq_file.h>
+#endif
+
+#include <asm/bootparam.h>
+#include <asm/kasan.h>
+#include <asm/mmu_context.h>
+#include <asm/page.h>
+#include <asm/param.h>
+#include <asm/platform.h>
+#include <asm/processor.h>
+#include <asm/sections.h>
+#include <asm/setup.h>
+#include <asm/smp.h>
+#include <asm/sysmem.h>
+#include <asm/timex.h>
+
+#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
+struct screen_info screen_info = {
+	.orig_x = 0,
+	.orig_y = 24,
+	.orig_video_cols = 80,
+	.orig_video_lines = 24,
+	.orig_video_isVGA = 1,
+	.orig_video_points = 16,
+};
+#endif
+
+#ifdef CONFIG_BLK_DEV_INITRD
+extern unsigned long initrd_start;
+extern unsigned long initrd_end;
+extern int initrd_below_start_ok;
+#endif
+
+#ifdef CONFIG_USE_OF
+void *dtb_start = __dtb_start;
+#endif
+
+extern unsigned long loops_per_jiffy;
+
+/* Command line specified as configuration option. */
+
+static char __initdata command_line[COMMAND_LINE_SIZE];
+
+#ifdef CONFIG_CMDLINE_BOOL
+static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
+#endif
+
+#ifdef CONFIG_PARSE_BOOTPARAM
+/*
+ * Boot parameter parsing.
+ *
+ * The Xtensa port uses a list of variable-sized tags to pass data to
+ * the kernel. The first tag must be a BP_TAG_FIRST tag for the list
+ * to be recognised. The list is terminated with a zero-sized
+ * BP_TAG_LAST tag.
+ */
+
+typedef struct tagtable {
+	u32 tag;
+	int (*parse)(const bp_tag_t*);
+} tagtable_t;
+
+#define __tagtable(tag, fn) static tagtable_t __tagtable_##fn 		\
+	__section(".taglist") __attribute__((used)) = { tag, fn }
+
+/* parse current tag */
+
+static int __init parse_tag_mem(const bp_tag_t *tag)
+{
+	struct bp_meminfo *mi = (struct bp_meminfo *)(tag->data);
+
+	if (mi->type != MEMORY_TYPE_CONVENTIONAL)
+		return -1;
+
+	return memblock_add(mi->start, mi->end - mi->start);
+}
+
+__tagtable(BP_TAG_MEMORY, parse_tag_mem);
+
+#ifdef CONFIG_BLK_DEV_INITRD
+
+static int __init parse_tag_initrd(const bp_tag_t* tag)
+{
+	struct bp_meminfo *mi = (struct bp_meminfo *)(tag->data);
+
+	initrd_start = (unsigned long)__va(mi->start);
+	initrd_end = (unsigned long)__va(mi->end);
+
+	return 0;
+}
+
+__tagtable(BP_TAG_INITRD, parse_tag_initrd);
+
+#endif /* CONFIG_BLK_DEV_INITRD */
+
+#ifdef CONFIG_USE_OF
+
+static int __init parse_tag_fdt(const bp_tag_t *tag)
+{
+	dtb_start = __va(tag->data[0]);
+	return 0;
+}
+
+__tagtable(BP_TAG_FDT, parse_tag_fdt);
+
+#endif /* CONFIG_USE_OF */
+
+static int __init parse_tag_cmdline(const bp_tag_t* tag)
+{
+	strscpy(command_line, (char *)(tag->data), COMMAND_LINE_SIZE);
+	return 0;
+}
+
+__tagtable(BP_TAG_COMMAND_LINE, parse_tag_cmdline);
+
+static int __init parse_bootparam(const bp_tag_t* tag)
+{
+	extern tagtable_t __tagtable_begin, __tagtable_end;
+	tagtable_t *t;
+
+	/* Boot parameters must start with a BP_TAG_FIRST tag. */
+
+	if (tag->id != BP_TAG_FIRST) {
+		pr_warn("Invalid boot parameters!\n");
+		return 0;
+	}
+
+	tag = (bp_tag_t*)((unsigned long)tag + sizeof(bp_tag_t) + tag->size);
+
+	/* Parse all tags. */
+
+	while (tag != NULL && tag->id != BP_TAG_LAST) {
+		for (t = &__tagtable_begin; t < &__tagtable_end; t++) {
+			if (tag->id == t->tag) {
+				t->parse(tag);
+				break;
+			}
+		}
+		if (t == &__tagtable_end)
+			pr_warn("Ignoring tag 0x%08x\n", tag->id);
+		tag = (bp_tag_t*)((unsigned long)(tag + 1) + tag->size);
+	}
+
+	return 0;
+}
+#else
+static int __init parse_bootparam(const bp_tag_t *tag)
+{
+	pr_info("Ignoring boot parameters at %p\n", tag);
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_USE_OF
+
+#if !XCHAL_HAVE_PTP_MMU || XCHAL_HAVE_SPANNING_WAY
+unsigned long xtensa_kio_paddr = XCHAL_KIO_DEFAULT_PADDR;
+EXPORT_SYMBOL(xtensa_kio_paddr);
+
+static int __init xtensa_dt_io_area(unsigned long node, const char *uname,
+		int depth, void *data)
+{
+	const __be32 *ranges;
+	int len;
+
+	if (depth > 1)
+		return 0;
+
+	if (!of_flat_dt_is_compatible(node, "simple-bus"))
+		return 0;
+
+	ranges = of_get_flat_dt_prop(node, "ranges", &len);
+	if (!ranges)
+		return 1;
+	if (len == 0)
+		return 1;
+
+	xtensa_kio_paddr = of_read_ulong(ranges+1, 1);
+	/* round down to nearest 256MB boundary */
+	xtensa_kio_paddr &= 0xf0000000;
+
+	init_kio();
+
+	return 1;
+}
+#else
+static int __init xtensa_dt_io_area(unsigned long node, const char *uname,
+		int depth, void *data)
+{
+	return 1;
+}
+#endif
+
+void __init early_init_devtree(void *params)
+{
+	early_init_dt_scan(params);
+	of_scan_flat_dt(xtensa_dt_io_area, NULL);
+
+	if (!command_line[0])
+		strscpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
+}
+
+#endif /* CONFIG_USE_OF */
+
+/*
+ * Initialize architecture. (Early stage)
+ */
+
+void __init init_arch(bp_tag_t *bp_start)
+{
+	/* Initialize MMU. */
+
+	init_mmu();
+
+	/* Initialize initial KASAN shadow map */
+
+	kasan_early_init();
+
+	/* Parse boot parameters */
+
+	if (bp_start)
+		parse_bootparam(bp_start);
+
+#ifdef CONFIG_USE_OF
+	early_init_devtree(dtb_start);
+#endif
+
+#ifdef CONFIG_CMDLINE_BOOL
+	if (!command_line[0])
+		strscpy(command_line, default_command_line, COMMAND_LINE_SIZE);
+#endif
+
+	/* Early hook for platforms */
+
+	platform_init(bp_start);
+}
+
+/*
+ * Initialize system. Setup memory and reserve regions.
+ */
+
+static inline int __init_memblock mem_reserve(unsigned long start,
+					      unsigned long end)
+{
+	return memblock_reserve(start, end - start);
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+	pr_info("config ID: %08x:%08x\n",
+		xtensa_get_sr(SREG_EPC), xtensa_get_sr(SREG_EXCSAVE));
+	if (xtensa_get_sr(SREG_EPC) != XCHAL_HW_CONFIGID0 ||
+	    xtensa_get_sr(SREG_EXCSAVE) != XCHAL_HW_CONFIGID1)
+		pr_info("built for config ID: %08x:%08x\n",
+			XCHAL_HW_CONFIGID0, XCHAL_HW_CONFIGID1);
+
+	*cmdline_p = command_line;
+	platform_setup(cmdline_p);
+	strscpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
+
+	/* Reserve some memory regions */
+
+#ifdef CONFIG_BLK_DEV_INITRD
+	if (initrd_start < initrd_end &&
+	    !mem_reserve(__pa(initrd_start), __pa(initrd_end)))
+		initrd_below_start_ok = 1;
+	else
+		initrd_start = 0;
+#endif
+
+	mem_reserve(__pa(_stext), __pa(_end));
+#ifdef CONFIG_XIP_KERNEL
+	mem_reserve(__pa(_xip_start), __pa(_xip_end));
+#endif
+
+#ifdef CONFIG_VECTORS_ADDR
+#ifdef SUPPORT_WINDOWED
+	mem_reserve(__pa(_WindowVectors_text_start),
+		    __pa(_WindowVectors_text_end));
+#endif
+
+	mem_reserve(__pa(_DebugInterruptVector_text_start),
+		    __pa(_DebugInterruptVector_text_end));
+
+	mem_reserve(__pa(_KernelExceptionVector_text_start),
+		    __pa(_KernelExceptionVector_text_end));
+
+	mem_reserve(__pa(_UserExceptionVector_text_start),
+		    __pa(_UserExceptionVector_text_end));
+
+	mem_reserve(__pa(_DoubleExceptionVector_text_start),
+		    __pa(_DoubleExceptionVector_text_end));
+
+	mem_reserve(__pa(_exception_text_start),
+		    __pa(_exception_text_end));
+#if XCHAL_EXCM_LEVEL >= 2
+	mem_reserve(__pa(_Level2InterruptVector_text_start),
+		    __pa(_Level2InterruptVector_text_end));
+#endif
+#if XCHAL_EXCM_LEVEL >= 3
+	mem_reserve(__pa(_Level3InterruptVector_text_start),
+		    __pa(_Level3InterruptVector_text_end));
+#endif
+#if XCHAL_EXCM_LEVEL >= 4
+	mem_reserve(__pa(_Level4InterruptVector_text_start),
+		    __pa(_Level4InterruptVector_text_end));
+#endif
+#if XCHAL_EXCM_LEVEL >= 5
+	mem_reserve(__pa(_Level5InterruptVector_text_start),
+		    __pa(_Level5InterruptVector_text_end));
+#endif
+#if XCHAL_EXCM_LEVEL >= 6
+	mem_reserve(__pa(_Level6InterruptVector_text_start),
+		    __pa(_Level6InterruptVector_text_end));
+#endif
+
+#endif /* CONFIG_VECTORS_ADDR */
+
+#ifdef CONFIG_SECONDARY_RESET_VECTOR
+	mem_reserve(__pa(_SecondaryResetVector_text_start),
+		    __pa(_SecondaryResetVector_text_end));
+#endif
+	parse_early_param();
+	bootmem_init();
+	kasan_init();
+	unflatten_and_copy_device_tree();
+
+#ifdef CONFIG_SMP
+	smp_init_cpus();
+#endif
+
+	paging_init();
+	zones_init();
+
+#ifdef CONFIG_VT
+# if defined(CONFIG_VGA_CONSOLE)
+	conswitchp = &vga_con;
+# endif
+#endif
+}
+
+static DEFINE_PER_CPU(struct cpu, cpu_data);
+
+static int __init topology_init(void)
+{
+	int i;
+
+	for_each_possible_cpu(i) {
+		struct cpu *cpu = &per_cpu(cpu_data, i);
+		cpu->hotpluggable = !!i;
+		register_cpu(cpu, i);
+	}
+
+	return 0;
+}
+subsys_initcall(topology_init);
+
+void cpu_reset(void)
+{
+#if XCHAL_HAVE_PTP_MMU && IS_ENABLED(CONFIG_MMU)
+	local_irq_disable();
+	/*
+	 * We have full MMU: all autoload ways, ways 7, 8 and 9 of DTLB must
+	 * be flushed.
+	 * Way 4 is not currently used by linux.
+	 * Ways 5 and 6 shall not be touched on MMUv2 as they are hardwired.
+	 * Way 5 shall be flushed and way 6 shall be set to identity mapping
+	 * on MMUv3.
+	 */
+	local_flush_tlb_all();
+	invalidate_page_directory();
+#if XCHAL_HAVE_SPANNING_WAY
+	/* MMU v3 */
+	{
+		unsigned long vaddr = (unsigned long)cpu_reset;
+		unsigned long paddr = __pa(vaddr);
+		unsigned long tmpaddr = vaddr + SZ_512M;
+		unsigned long tmp0, tmp1, tmp2, tmp3;
+
+		/*
+		 * Find a place for the temporary mapping. It must not be
+		 * in the same 512MB region with vaddr or paddr, otherwise
+		 * there may be multihit exception either on entry to the
+		 * temporary mapping, or on entry to the identity mapping.
+		 * (512MB is the biggest page size supported by TLB.)
+		 */
+		while (((tmpaddr ^ paddr) & -SZ_512M) == 0)
+			tmpaddr += SZ_512M;
+
+		/* Invalidate mapping in the selected temporary area */
+		if (itlb_probe(tmpaddr) & BIT(ITLB_HIT_BIT))
+			invalidate_itlb_entry(itlb_probe(tmpaddr));
+		if (itlb_probe(tmpaddr + PAGE_SIZE) & BIT(ITLB_HIT_BIT))
+			invalidate_itlb_entry(itlb_probe(tmpaddr + PAGE_SIZE));
+
+		/*
+		 * Map two consecutive pages starting at the physical address
+		 * of this function to the temporary mapping area.
+		 */
+		write_itlb_entry(__pte((paddr & PAGE_MASK) |
+				       _PAGE_HW_VALID |
+				       _PAGE_HW_EXEC |
+				       _PAGE_CA_BYPASS),
+				 tmpaddr & PAGE_MASK);
+		write_itlb_entry(__pte(((paddr & PAGE_MASK) + PAGE_SIZE) |
+				       _PAGE_HW_VALID |
+				       _PAGE_HW_EXEC |
+				       _PAGE_CA_BYPASS),
+				 (tmpaddr & PAGE_MASK) + PAGE_SIZE);
+
+		/* Reinitialize TLB */
+		__asm__ __volatile__ ("movi	%0, 1f\n\t"
+				      "movi	%3, 2f\n\t"
+				      "add	%0, %0, %4\n\t"
+				      "add	%3, %3, %5\n\t"
+				      "jx	%0\n"
+				      /*
+				       * No literal, data or stack access
+				       * below this point
+				       */
+				      "1:\n\t"
+				      /* Initialize *tlbcfg */
+				      "movi	%0, 0\n\t"
+				      "wsr	%0, itlbcfg\n\t"
+				      "wsr	%0, dtlbcfg\n\t"
+				      /* Invalidate TLB way 5 */
+				      "movi	%0, 4\n\t"
+				      "movi	%1, 5\n"
+				      "1:\n\t"
+				      "iitlb	%1\n\t"
+				      "idtlb	%1\n\t"
+				      "add	%1, %1, %6\n\t"
+				      "addi	%0, %0, -1\n\t"
+				      "bnez	%0, 1b\n\t"
+				      /* Initialize TLB way 6 */
+				      "movi	%0, 7\n\t"
+				      "addi	%1, %9, 3\n\t"
+				      "addi	%2, %9, 6\n"
+				      "1:\n\t"
+				      "witlb	%1, %2\n\t"
+				      "wdtlb	%1, %2\n\t"
+				      "add	%1, %1, %7\n\t"
+				      "add	%2, %2, %7\n\t"
+				      "addi	%0, %0, -1\n\t"
+				      "bnez	%0, 1b\n\t"
+				      "isync\n\t"
+				      /* Jump to identity mapping */
+				      "jx	%3\n"
+				      "2:\n\t"
+				      /* Complete way 6 initialization */
+				      "witlb	%1, %2\n\t"
+				      "wdtlb	%1, %2\n\t"
+				      /* Invalidate temporary mapping */
+				      "sub	%0, %9, %7\n\t"
+				      "iitlb	%0\n\t"
+				      "add	%0, %0, %8\n\t"
+				      "iitlb	%0"
+				      : "=&a"(tmp0), "=&a"(tmp1), "=&a"(tmp2),
+					"=&a"(tmp3)
+				      : "a"(tmpaddr - vaddr),
+					"a"(paddr - vaddr),
+					"a"(SZ_128M), "a"(SZ_512M),
+					"a"(PAGE_SIZE),
+					"a"((tmpaddr + SZ_512M) & PAGE_MASK)
+				      : "memory");
+	}
+#endif
+#endif
+	__asm__ __volatile__ ("movi	a2, 0\n\t"
+			      "wsr	a2, icountlevel\n\t"
+			      "movi	a2, 0\n\t"
+			      "wsr	a2, icount\n\t"
+#if XCHAL_NUM_IBREAK > 0
+			      "wsr	a2, ibreakenable\n\t"
+#endif
+#if XCHAL_HAVE_LOOPS
+			      "wsr	a2, lcount\n\t"
+#endif
+			      "movi	a2, 0x1f\n\t"
+			      "wsr	a2, ps\n\t"
+			      "isync\n\t"
+			      "jx	%0\n\t"
+			      :
+			      : "a" (XCHAL_RESET_VECTOR_VADDR)
+			      : "a2");
+	for (;;)
+		;
+}
+
+void machine_restart(char * cmd)
+{
+	platform_restart();
+}
+
+void machine_halt(void)
+{
+	platform_halt();
+	while (1);
+}
+
+void machine_power_off(void)
+{
+	platform_power_off();
+	while (1);
+}
+#ifdef CONFIG_PROC_FS
+
+/*
+ * Display some core information through /proc/cpuinfo.
+ */
+
+static int
+c_show(struct seq_file *f, void *slot)
+{
+	/* high-level stuff */
+	seq_printf(f, "CPU count\t: %u\n"
+		      "CPU list\t: %*pbl\n"
+		      "vendor_id\t: Tensilica\n"
+		      "model\t\t: Xtensa " XCHAL_HW_VERSION_NAME "\n"
+		      "core ID\t\t: " XCHAL_CORE_ID "\n"
+		      "build ID\t: 0x%x\n"
+		      "config ID\t: %08x:%08x\n"
+		      "byte order\t: %s\n"
+		      "cpu MHz\t\t: %lu.%02lu\n"
+		      "bogomips\t: %lu.%02lu\n",
+		      num_online_cpus(),
+		      cpumask_pr_args(cpu_online_mask),
+		      XCHAL_BUILD_UNIQUE_ID,
+		      xtensa_get_sr(SREG_EPC), xtensa_get_sr(SREG_EXCSAVE),
+		      XCHAL_HAVE_BE ?  "big" : "little",
+		      ccount_freq/1000000,
+		      (ccount_freq/10000) % 100,
+		      loops_per_jiffy/(500000/HZ),
+		      (loops_per_jiffy/(5000/HZ)) % 100);
+	seq_puts(f, "flags\t\t: "
+#if XCHAL_HAVE_NMI
+		     "nmi "
+#endif
+#if XCHAL_HAVE_DEBUG
+		     "debug "
+# if XCHAL_HAVE_OCD
+		     "ocd "
+# endif
+#endif
+#if XCHAL_HAVE_DENSITY
+	    	     "density "
+#endif
+#if XCHAL_HAVE_BOOLEANS
+		     "boolean "
+#endif
+#if XCHAL_HAVE_LOOPS
+		     "loop "
+#endif
+#if XCHAL_HAVE_NSA
+		     "nsa "
+#endif
+#if XCHAL_HAVE_MINMAX
+		     "minmax "
+#endif
+#if XCHAL_HAVE_SEXT
+		     "sext "
+#endif
+#if XCHAL_HAVE_CLAMPS
+		     "clamps "
+#endif
+#if XCHAL_HAVE_MAC16
+		     "mac16 "
+#endif
+#if XCHAL_HAVE_MUL16
+		     "mul16 "
+#endif
+#if XCHAL_HAVE_MUL32
+		     "mul32 "
+#endif
+#if XCHAL_HAVE_MUL32_HIGH
+		     "mul32h "
+#endif
+#if XCHAL_HAVE_FP
+		     "fpu "
+#endif
+#if XCHAL_HAVE_S32C1I
+		     "s32c1i "
+#endif
+#if XCHAL_HAVE_EXCLUSIVE
+		     "exclusive "
+#endif
+		     "\n");
+
+	/* Registers. */
+	seq_printf(f,"physical aregs\t: %d\n"
+		     "misc regs\t: %d\n"
+		     "ibreak\t\t: %d\n"
+		     "dbreak\t\t: %d\n",
+		     XCHAL_NUM_AREGS,
+		     XCHAL_NUM_MISC_REGS,
+		     XCHAL_NUM_IBREAK,
+		     XCHAL_NUM_DBREAK);
+
+
+	/* Interrupt. */
+	seq_printf(f,"num ints\t: %d\n"
+		     "ext ints\t: %d\n"
+		     "int levels\t: %d\n"
+		     "timers\t\t: %d\n"
+		     "debug level\t: %d\n",
+		     XCHAL_NUM_INTERRUPTS,
+		     XCHAL_NUM_EXTINTERRUPTS,
+		     XCHAL_NUM_INTLEVELS,
+		     XCHAL_NUM_TIMERS,
+		     XCHAL_DEBUGLEVEL);
+
+	/* Cache */
+	seq_printf(f,"icache line size: %d\n"
+		     "icache ways\t: %d\n"
+		     "icache size\t: %d\n"
+		     "icache flags\t: "
+#if XCHAL_ICACHE_LINE_LOCKABLE
+		     "lock "
+#endif
+		     "\n"
+		     "dcache line size: %d\n"
+		     "dcache ways\t: %d\n"
+		     "dcache size\t: %d\n"
+		     "dcache flags\t: "
+#if XCHAL_DCACHE_IS_WRITEBACK
+		     "writeback "
+#endif
+#if XCHAL_DCACHE_LINE_LOCKABLE
+		     "lock "
+#endif
+		     "\n",
+		     XCHAL_ICACHE_LINESIZE,
+		     XCHAL_ICACHE_WAYS,
+		     XCHAL_ICACHE_SIZE,
+		     XCHAL_DCACHE_LINESIZE,
+		     XCHAL_DCACHE_WAYS,
+		     XCHAL_DCACHE_SIZE);
+
+	return 0;
+}
+
+/*
+ * We show only CPU #0 info.
+ */
+static void *
+c_start(struct seq_file *f, loff_t *pos)
+{
+	return (*pos == 0) ? (void *)1 : NULL;
+}
+
+static void *
+c_next(struct seq_file *f, void *v, loff_t *pos)
+{
+	++*pos;
+	return c_start(f, pos);
+}
+
+static void
+c_stop(struct seq_file *f, void *v)
+{
+}
+
+const struct seq_operations cpuinfo_op =
+{
+	.start	= c_start,
+	.next	= c_next,
+	.stop	= c_stop,
+	.show	= c_show,
+};
+
+#endif /* CONFIG_PROC_FS */
diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c
new file mode 100644
index 000000000..5c01d7e70
--- /dev/null
+++ b/arch/xtensa/kernel/signal.c
@@ -0,0 +1,533 @@
+/*
+ * arch/xtensa/kernel/signal.c
+ *
+ * Default platform functions.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2005, 2006 Tensilica Inc.
+ * Copyright (C) 1991, 1992  Linus Torvalds
+ * 1997-11-28  Modified for POSIX.1b signals by Richard Henderson
+ *
+ * Chris Zankel <chris@zankel.net>
+ * Joe Taylor <joe@tensilica.com>
+ */
+
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/ptrace.h>
+#include <linux/personality.h>
+#include <linux/resume_user_mode.h>
+#include <linux/sched/task_stack.h>
+
+#include <asm/ucontext.h>
+#include <linux/uaccess.h>
+#include <asm/cacheflush.h>
+#include <asm/coprocessor.h>
+#include <asm/unistd.h>
+
+extern struct task_struct *coproc_owners[];
+
+struct rt_sigframe
+{
+	struct siginfo info;
+	struct ucontext uc;
+	struct {
+		xtregs_opt_t opt;
+		xtregs_user_t user;
+#if XTENSA_HAVE_COPROCESSORS
+		xtregs_coprocessor_t cp;
+#endif
+	} xtregs;
+	unsigned char retcode[6];
+	unsigned int window[4];
+};
+
+#if defined(USER_SUPPORT_WINDOWED)
+/*
+ * Flush register windows stored in pt_regs to stack.
+ * Returns 1 for errors.
+ */
+
+static int
+flush_window_regs_user(struct pt_regs *regs)
+{
+	const unsigned long ws = regs->windowstart;
+	const unsigned long wb = regs->windowbase;
+	unsigned long sp = 0;
+	unsigned long wm;
+	int err = 1;
+	int base;
+
+	/* Return if no other frames. */
+
+	if (regs->wmask == 1)
+		return 0;
+
+	/* Rotate windowmask and skip empty frames. */
+
+	wm = (ws >> wb) | (ws << (XCHAL_NUM_AREGS / 4 - wb));
+	base = (XCHAL_NUM_AREGS / 4) - (regs->wmask >> 4);
+		
+	/* For call8 or call12 frames, we need the previous stack pointer. */
+
+	if ((regs->wmask & 2) == 0)
+		if (__get_user(sp, (int*)(regs->areg[base * 4 + 1] - 12)))
+			goto errout;
+
+	/* Spill frames to stack. */
+
+	while (base < XCHAL_NUM_AREGS / 4) {
+
+		int m = (wm >> base);
+		int inc = 0;
+
+		/* Save registers a4..a7 (call8) or a4...a11 (call12) */
+
+		if (m & 2) {			/* call4 */
+			inc = 1;
+
+		} else if (m & 4) {		/* call8 */
+			if (copy_to_user(&SPILL_SLOT_CALL8(sp, 4),
+					 &regs->areg[(base + 1) * 4], 16))
+				goto errout;
+			inc = 2;
+
+		} else if (m & 8) {	/* call12 */
+			if (copy_to_user(&SPILL_SLOT_CALL12(sp, 4),
+					 &regs->areg[(base + 1) * 4], 32))
+				goto errout;
+			inc = 3;
+		}
+
+		/* Save current frame a0..a3 under next SP */
+
+		sp = regs->areg[((base + inc) * 4 + 1) % XCHAL_NUM_AREGS];
+		if (copy_to_user(&SPILL_SLOT(sp, 0), &regs->areg[base * 4], 16))
+			goto errout;
+
+		/* Get current stack pointer for next loop iteration. */
+
+		sp = regs->areg[base * 4 + 1];
+		base += inc;
+	}
+
+	regs->wmask = 1;
+	regs->windowstart = 1 << wb;
+
+	return 0;
+
+errout:
+	return err;
+}
+#else
+static int
+flush_window_regs_user(struct pt_regs *regs)
+{
+	return 0;
+}
+#endif
+
+/*
+ * Note: We don't copy double exception 'regs', we have to finish double exc. 
+ * first before we return to signal handler! This dbl.exc.handler might cause 
+ * another double exception, but I think we are fine as the situation is the 
+ * same as if we had returned to the signal handerl and got an interrupt 
+ * immediately...
+ */
+
+static int
+setup_sigcontext(struct rt_sigframe __user *frame, struct pt_regs *regs)
+{
+	struct sigcontext __user *sc = &frame->uc.uc_mcontext;
+	struct thread_info *ti = current_thread_info();
+	int err = 0;
+
+#define COPY(x)	err |= __put_user(regs->x, &sc->sc_##x)
+	COPY(pc);
+	COPY(ps);
+	COPY(lbeg);
+	COPY(lend);
+	COPY(lcount);
+	COPY(sar);
+#undef COPY
+
+	err |= flush_window_regs_user(regs);
+	err |= __copy_to_user (sc->sc_a, regs->areg, 16 * 4);
+	err |= __put_user(0, &sc->sc_xtregs);
+
+	if (err)
+		return err;
+
+#if XTENSA_HAVE_COPROCESSORS
+	coprocessor_flush_release_all(ti);
+	err |= __copy_to_user(&frame->xtregs.cp, &ti->xtregs_cp,
+			      sizeof (frame->xtregs.cp));
+#endif
+	err |= __copy_to_user(&frame->xtregs.opt, &regs->xtregs_opt,
+			      sizeof (xtregs_opt_t));
+	err |= __copy_to_user(&frame->xtregs.user, &ti->xtregs_user,
+			      sizeof (xtregs_user_t));
+
+	err |= __put_user(err ? NULL : &frame->xtregs, &sc->sc_xtregs);
+
+	return err;
+}
+
+static int
+restore_sigcontext(struct pt_regs *regs, struct rt_sigframe __user *frame)
+{
+	struct sigcontext __user *sc = &frame->uc.uc_mcontext;
+	struct thread_info *ti = current_thread_info();
+	unsigned int err = 0;
+	unsigned long ps;
+
+#define COPY(x)	err |= __get_user(regs->x, &sc->sc_##x)
+	COPY(pc);
+	COPY(lbeg);
+	COPY(lend);
+	COPY(lcount);
+	COPY(sar);
+#undef COPY
+
+	/* All registers were flushed to stack. Start with a pristine frame. */
+
+	regs->wmask = 1;
+	regs->windowbase = 0;
+	regs->windowstart = 1;
+
+	regs->syscall = NO_SYSCALL;	/* disable syscall checks */
+
+	/* For PS, restore only PS.CALLINC.
+	 * Assume that all other bits are either the same as for the signal
+	 * handler, or the user mode value doesn't matter (e.g. PS.OWB).
+	 */
+	err |= __get_user(ps, &sc->sc_ps);
+	regs->ps = (regs->ps & ~PS_CALLINC_MASK) | (ps & PS_CALLINC_MASK);
+
+	/* Additional corruption checks */
+
+	if ((regs->lcount > 0)
+	    && ((regs->lbeg > TASK_SIZE) || (regs->lend > TASK_SIZE)) )
+		err = 1;
+
+	err |= __copy_from_user(regs->areg, sc->sc_a, 16 * 4);
+
+	if (err)
+		return err;
+
+	/* The signal handler may have used coprocessors in which
+	 * case they are still enabled.  We disable them to force a
+	 * reloading of the original task's CP state by the lazy
+	 * context-switching mechanisms of CP exception handling.
+	 * Also, we essentially discard any coprocessor state that the
+	 * signal handler created. */
+
+#if XTENSA_HAVE_COPROCESSORS
+	coprocessor_release_all(ti);
+	err |= __copy_from_user(&ti->xtregs_cp, &frame->xtregs.cp,
+				sizeof (frame->xtregs.cp));
+#endif
+	err |= __copy_from_user(&ti->xtregs_user, &frame->xtregs.user,
+				sizeof (xtregs_user_t));
+	err |= __copy_from_user(&regs->xtregs_opt, &frame->xtregs.opt,
+				sizeof (xtregs_opt_t));
+
+	return err;
+}
+
+
+/*
+ * Do a signal return; undo the signal stack.
+ */
+
+asmlinkage long xtensa_rt_sigreturn(void)
+{
+	struct pt_regs *regs = current_pt_regs();
+	struct rt_sigframe __user *frame;
+	sigset_t set;
+	int ret;
+
+	/* Always make any pending restarted system calls return -EINTR */
+	current->restart_block.fn = do_no_restart_syscall;
+
+	if (regs->depc > 64)
+		panic("rt_sigreturn in double exception!\n");
+
+	frame = (struct rt_sigframe __user *) regs->areg[1];
+
+	if (!access_ok(frame, sizeof(*frame)))
+		goto badframe;
+
+	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+		goto badframe;
+
+	set_current_blocked(&set);
+
+	if (restore_sigcontext(regs, frame))
+		goto badframe;
+
+	ret = regs->areg[2];
+
+	if (restore_altstack(&frame->uc.uc_stack))
+		goto badframe;
+
+	return ret;
+
+badframe:
+	force_sig(SIGSEGV);
+	return 0;
+}
+
+
+
+/*
+ * Set up a signal frame.
+ */
+
+static int
+gen_return_code(unsigned char *codemem)
+{
+	int err = 0;
+
+	/*
+	 * The 12-bit immediate is really split up within the 24-bit MOVI
+	 * instruction.  As long as the above system call numbers fit within
+	 * 8-bits, the following code works fine. See the Xtensa ISA for
+	 * details.
+	 */
+
+#if __NR_rt_sigreturn > 255
+# error Generating the MOVI instruction below breaks!
+#endif
+
+#ifdef __XTENSA_EB__   /* Big Endian version */
+	/* Generate instruction:  MOVI a2, __NR_rt_sigreturn */
+	err |= __put_user(0x22, &codemem[0]);
+	err |= __put_user(0x0a, &codemem[1]);
+	err |= __put_user(__NR_rt_sigreturn, &codemem[2]);
+	/* Generate instruction:  SYSCALL */
+	err |= __put_user(0x00, &codemem[3]);
+	err |= __put_user(0x05, &codemem[4]);
+	err |= __put_user(0x00, &codemem[5]);
+
+#elif defined __XTENSA_EL__   /* Little Endian version */
+	/* Generate instruction:  MOVI a2, __NR_rt_sigreturn */
+	err |= __put_user(0x22, &codemem[0]);
+	err |= __put_user(0xa0, &codemem[1]);
+	err |= __put_user(__NR_rt_sigreturn, &codemem[2]);
+	/* Generate instruction:  SYSCALL */
+	err |= __put_user(0x00, &codemem[3]);
+	err |= __put_user(0x50, &codemem[4]);
+	err |= __put_user(0x00, &codemem[5]);
+#else
+# error Must use compiler for Xtensa processors.
+#endif
+
+	/* Flush generated code out of the data cache */
+
+	if (err == 0) {
+		__invalidate_icache_range((unsigned long)codemem, 6UL);
+		__flush_invalidate_dcache_range((unsigned long)codemem, 6UL);
+	}
+
+	return err;
+}
+
+
+static int setup_frame(struct ksignal *ksig, sigset_t *set,
+		       struct pt_regs *regs)
+{
+	struct rt_sigframe *frame;
+	int err = 0, sig = ksig->sig;
+	unsigned long sp, ra, tp, ps;
+	unsigned long handler = (unsigned long)ksig->ka.sa.sa_handler;
+	unsigned long handler_fdpic_GOT = 0;
+	unsigned int base;
+	bool fdpic = IS_ENABLED(CONFIG_BINFMT_ELF_FDPIC) &&
+		(current->personality & FDPIC_FUNCPTRS);
+
+	if (fdpic) {
+		unsigned long __user *fdpic_func_desc =
+			(unsigned long __user *)handler;
+		if (__get_user(handler, &fdpic_func_desc[0]) ||
+		    __get_user(handler_fdpic_GOT, &fdpic_func_desc[1]))
+			return -EFAULT;
+	}
+
+	sp = regs->areg[1];
+
+	if ((ksig->ka.sa.sa_flags & SA_ONSTACK) != 0 && sas_ss_flags(sp) == 0) {
+		sp = current->sas_ss_sp + current->sas_ss_size;
+	}
+
+	frame = (void *)((sp - sizeof(*frame)) & -16ul);
+
+	if (regs->depc > 64)
+		panic ("Double exception sys_sigreturn\n");
+
+	if (!access_ok(frame, sizeof(*frame))) {
+		return -EFAULT;
+	}
+
+	if (ksig->ka.sa.sa_flags & SA_SIGINFO) {
+		err |= copy_siginfo_to_user(&frame->info, &ksig->info);
+	}
+
+	/* Create the user context.  */
+
+	err |= __put_user(0, &frame->uc.uc_flags);
+	err |= __put_user(0, &frame->uc.uc_link);
+	err |= __save_altstack(&frame->uc.uc_stack, regs->areg[1]);
+	err |= setup_sigcontext(frame, regs);
+	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+
+	if (ksig->ka.sa.sa_flags & SA_RESTORER) {
+		if (fdpic) {
+			unsigned long __user *fdpic_func_desc =
+				(unsigned long __user *)ksig->ka.sa.sa_restorer;
+
+			err |= __get_user(ra, fdpic_func_desc);
+		} else {
+			ra = (unsigned long)ksig->ka.sa.sa_restorer;
+		}
+	} else {
+
+		/* Create sys_rt_sigreturn syscall in stack frame */
+
+		err |= gen_return_code(frame->retcode);
+		ra = (unsigned long) frame->retcode;
+	}
+
+	if (err)
+		return -EFAULT;
+
+	/*
+	 * Create signal handler execution context.
+	 * Return context not modified until this point.
+	 */
+
+	/* Set up registers for signal handler; preserve the threadptr */
+	tp = regs->threadptr;
+	ps = regs->ps;
+	start_thread(regs, handler, (unsigned long)frame);
+
+	/* Set up a stack frame for a call4 if userspace uses windowed ABI */
+	if (ps & PS_WOE_MASK) {
+		base = 4;
+		regs->areg[base] =
+			(((unsigned long) ra) & 0x3fffffff) | 0x40000000;
+		ps = (ps & ~(PS_CALLINC_MASK | PS_OWB_MASK)) |
+			(1 << PS_CALLINC_SHIFT);
+	} else {
+		base = 0;
+		regs->areg[base] = (unsigned long) ra;
+	}
+	regs->areg[base + 2] = (unsigned long) sig;
+	regs->areg[base + 3] = (unsigned long) &frame->info;
+	regs->areg[base + 4] = (unsigned long) &frame->uc;
+	regs->threadptr = tp;
+	regs->ps = ps;
+	if (fdpic)
+		regs->areg[base + 11] = handler_fdpic_GOT;
+
+	pr_debug("SIG rt deliver (%s:%d): signal=%d sp=%p pc=%08lx\n",
+		 current->comm, current->pid, sig, frame, regs->pc);
+
+	return 0;
+}
+
+/*
+ * Note that 'init' is a special process: it doesn't get signals it doesn't
+ * want to handle. Thus you cannot kill init even with a SIGKILL even by
+ * mistake.
+ *
+ * Note that we go through the signals twice: once to check the signals that
+ * the kernel can handle, and then we build all the user-level signal handling
+ * stack-frames in one go after that.
+ */
+static void do_signal(struct pt_regs *regs)
+{
+	struct ksignal ksig;
+
+	task_pt_regs(current)->icountlevel = 0;
+
+	if (get_signal(&ksig)) {
+		int ret;
+
+		/* Are we from a system call? */
+
+		if (regs->syscall != NO_SYSCALL) {
+
+			/* If so, check system call restarting.. */
+
+			switch (regs->areg[2]) {
+				case -ERESTARTNOHAND:
+				case -ERESTART_RESTARTBLOCK:
+					regs->areg[2] = -EINTR;
+					break;
+
+				case -ERESTARTSYS:
+					if (!(ksig.ka.sa.sa_flags & SA_RESTART)) {
+						regs->areg[2] = -EINTR;
+						break;
+					}
+					fallthrough;
+				case -ERESTARTNOINTR:
+					regs->areg[2] = regs->syscall;
+					regs->pc -= 3;
+					break;
+
+				default:
+					/* nothing to do */
+					if (regs->areg[2] != 0)
+					break;
+			}
+		}
+
+		/* Whee!  Actually deliver the signal.  */
+		/* Set up the stack frame */
+		ret = setup_frame(&ksig, sigmask_to_save(), regs);
+		signal_setup_done(ret, &ksig, 0);
+		if (test_thread_flag(TIF_SINGLESTEP))
+			task_pt_regs(current)->icountlevel = 1;
+
+		return;
+	}
+
+	/* Did we come from a system call? */
+	if (regs->syscall != NO_SYSCALL) {
+		/* Restart the system call - no handlers present */
+		switch (regs->areg[2]) {
+		case -ERESTARTNOHAND:
+		case -ERESTARTSYS:
+		case -ERESTARTNOINTR:
+			regs->areg[2] = regs->syscall;
+			regs->pc -= 3;
+			break;
+		case -ERESTART_RESTARTBLOCK:
+			regs->areg[2] = __NR_restart_syscall;
+			regs->pc -= 3;
+			break;
+		}
+	}
+
+	/* If there's no signal to deliver, we just restore the saved mask.  */
+	restore_saved_sigmask();
+
+	if (test_thread_flag(TIF_SINGLESTEP))
+		task_pt_regs(current)->icountlevel = 1;
+	return;
+}
+
+void do_notify_resume(struct pt_regs *regs)
+{
+	if (test_thread_flag(TIF_SIGPENDING) ||
+	    test_thread_flag(TIF_NOTIFY_SIGNAL))
+		do_signal(regs);
+
+	if (test_thread_flag(TIF_NOTIFY_RESUME))
+		resume_user_mode_work(regs);
+}
diff --git a/arch/xtensa/kernel/smp.c b/arch/xtensa/kernel/smp.c
new file mode 100644
index 000000000..4dc109dd6
--- /dev/null
+++ b/arch/xtensa/kernel/smp.c
@@ -0,0 +1,634 @@
+/*
+ * Xtensa SMP support functions.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2008 - 2013 Tensilica Inc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ * Joe Taylor <joe@tensilica.com>
+ * Pete Delaney <piet@tensilica.com
+ */
+
+#include <linux/cpu.h>
+#include <linux/cpumask.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/irq.h>
+#include <linux/kdebug.h>
+#include <linux/module.h>
+#include <linux/sched/mm.h>
+#include <linux/sched/hotplug.h>
+#include <linux/sched/task_stack.h>
+#include <linux/reboot.h>
+#include <linux/seq_file.h>
+#include <linux/smp.h>
+#include <linux/thread_info.h>
+
+#include <asm/cacheflush.h>
+#include <asm/coprocessor.h>
+#include <asm/kdebug.h>
+#include <asm/mmu_context.h>
+#include <asm/mxregs.h>
+#include <asm/platform.h>
+#include <asm/tlbflush.h>
+#include <asm/traps.h>
+
+#ifdef CONFIG_SMP
+# if XCHAL_HAVE_S32C1I == 0
+#  error "The S32C1I option is required for SMP."
+# endif
+#endif
+
+static void system_invalidate_dcache_range(unsigned long start,
+		unsigned long size);
+static void system_flush_invalidate_dcache_range(unsigned long start,
+		unsigned long size);
+
+/* IPI (Inter Process Interrupt) */
+
+#define IPI_IRQ	0
+
+static irqreturn_t ipi_interrupt(int irq, void *dev_id);
+
+void ipi_init(void)
+{
+	unsigned irq = irq_create_mapping(NULL, IPI_IRQ);
+	if (request_irq(irq, ipi_interrupt, IRQF_PERCPU, "ipi", NULL))
+		pr_err("Failed to request irq %u (ipi)\n", irq);
+}
+
+static inline unsigned int get_core_count(void)
+{
+	/* Bits 18..21 of SYSCFGID contain the core count minus 1. */
+	unsigned int syscfgid = get_er(SYSCFGID);
+	return ((syscfgid >> 18) & 0xf) + 1;
+}
+
+static inline int get_core_id(void)
+{
+	/* Bits 0...18 of SYSCFGID contain the core id  */
+	unsigned int core_id = get_er(SYSCFGID);
+	return core_id & 0x3fff;
+}
+
+void __init smp_prepare_cpus(unsigned int max_cpus)
+{
+	unsigned i;
+
+	for_each_possible_cpu(i)
+		set_cpu_present(i, true);
+}
+
+void __init smp_init_cpus(void)
+{
+	unsigned i;
+	unsigned int ncpus = get_core_count();
+	unsigned int core_id = get_core_id();
+
+	pr_info("%s: Core Count = %d\n", __func__, ncpus);
+	pr_info("%s: Core Id = %d\n", __func__, core_id);
+
+	if (ncpus > NR_CPUS) {
+		ncpus = NR_CPUS;
+		pr_info("%s: limiting core count by %d\n", __func__, ncpus);
+	}
+
+	for (i = 0; i < ncpus; ++i)
+		set_cpu_possible(i, true);
+}
+
+void __init smp_prepare_boot_cpu(void)
+{
+	unsigned int cpu = smp_processor_id();
+	BUG_ON(cpu != 0);
+	cpu_asid_cache(cpu) = ASID_USER_FIRST;
+}
+
+void __init smp_cpus_done(unsigned int max_cpus)
+{
+}
+
+static int boot_secondary_processors = 1; /* Set with xt-gdb via .xt-gdb */
+static DECLARE_COMPLETION(cpu_running);
+
+void secondary_start_kernel(void)
+{
+	struct mm_struct *mm = &init_mm;
+	unsigned int cpu = smp_processor_id();
+
+	init_mmu();
+
+#ifdef CONFIG_DEBUG_MISC
+	if (boot_secondary_processors == 0) {
+		pr_debug("%s: boot_secondary_processors:%d; Hanging cpu:%d\n",
+			__func__, boot_secondary_processors, cpu);
+		for (;;)
+			__asm__ __volatile__ ("waiti " __stringify(LOCKLEVEL));
+	}
+
+	pr_debug("%s: boot_secondary_processors:%d; Booting cpu:%d\n",
+		__func__, boot_secondary_processors, cpu);
+#endif
+	/* Init EXCSAVE1 */
+
+	secondary_trap_init();
+
+	/* All kernel threads share the same mm context. */
+
+	mmget(mm);
+	mmgrab(mm);
+	current->active_mm = mm;
+	cpumask_set_cpu(cpu, mm_cpumask(mm));
+	enter_lazy_tlb(mm, current);
+
+	trace_hardirqs_off();
+
+	calibrate_delay();
+
+	notify_cpu_starting(cpu);
+
+	secondary_init_irq();
+	local_timer_setup(cpu);
+
+	set_cpu_online(cpu, true);
+
+	local_irq_enable();
+
+	complete(&cpu_running);
+
+	cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
+}
+
+static void mx_cpu_start(void *p)
+{
+	unsigned cpu = (unsigned)p;
+	unsigned long run_stall_mask = get_er(MPSCORE);
+
+	set_er(run_stall_mask & ~(1u << cpu), MPSCORE);
+	pr_debug("%s: cpu: %d, run_stall_mask: %lx ---> %lx\n",
+			__func__, cpu, run_stall_mask, get_er(MPSCORE));
+}
+
+static void mx_cpu_stop(void *p)
+{
+	unsigned cpu = (unsigned)p;
+	unsigned long run_stall_mask = get_er(MPSCORE);
+
+	set_er(run_stall_mask | (1u << cpu), MPSCORE);
+	pr_debug("%s: cpu: %d, run_stall_mask: %lx ---> %lx\n",
+			__func__, cpu, run_stall_mask, get_er(MPSCORE));
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+unsigned long cpu_start_id __cacheline_aligned;
+#endif
+unsigned long cpu_start_ccount;
+
+static int boot_secondary(unsigned int cpu, struct task_struct *ts)
+{
+	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
+	unsigned long ccount;
+	int i;
+
+#ifdef CONFIG_HOTPLUG_CPU
+	WRITE_ONCE(cpu_start_id, cpu);
+	/* Pairs with the third memw in the cpu_restart */
+	mb();
+	system_flush_invalidate_dcache_range((unsigned long)&cpu_start_id,
+					     sizeof(cpu_start_id));
+#endif
+	smp_call_function_single(0, mx_cpu_start, (void *)cpu, 1);
+
+	for (i = 0; i < 2; ++i) {
+		do
+			ccount = get_ccount();
+		while (!ccount);
+
+		WRITE_ONCE(cpu_start_ccount, ccount);
+
+		do {
+			/*
+			 * Pairs with the first two memws in the
+			 * .Lboot_secondary.
+			 */
+			mb();
+			ccount = READ_ONCE(cpu_start_ccount);
+		} while (ccount && time_before(jiffies, timeout));
+
+		if (ccount) {
+			smp_call_function_single(0, mx_cpu_stop,
+						 (void *)cpu, 1);
+			WRITE_ONCE(cpu_start_ccount, 0);
+			return -EIO;
+		}
+	}
+	return 0;
+}
+
+int __cpu_up(unsigned int cpu, struct task_struct *idle)
+{
+	int ret = 0;
+
+	if (cpu_asid_cache(cpu) == 0)
+		cpu_asid_cache(cpu) = ASID_USER_FIRST;
+
+	start_info.stack = (unsigned long)task_pt_regs(idle);
+	wmb();
+
+	pr_debug("%s: Calling wakeup_secondary(cpu:%d, idle:%p, sp: %08lx)\n",
+			__func__, cpu, idle, start_info.stack);
+
+	init_completion(&cpu_running);
+	ret = boot_secondary(cpu, idle);
+	if (ret == 0) {
+		wait_for_completion_timeout(&cpu_running,
+				msecs_to_jiffies(1000));
+		if (!cpu_online(cpu))
+			ret = -EIO;
+	}
+
+	if (ret)
+		pr_err("CPU %u failed to boot\n", cpu);
+
+	return ret;
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+
+/*
+ * __cpu_disable runs on the processor to be shutdown.
+ */
+int __cpu_disable(void)
+{
+	unsigned int cpu = smp_processor_id();
+
+	/*
+	 * Take this CPU offline.  Once we clear this, we can't return,
+	 * and we must not schedule until we're ready to give up the cpu.
+	 */
+	set_cpu_online(cpu, false);
+
+#if XTENSA_HAVE_COPROCESSORS
+	/*
+	 * Flush coprocessor contexts that are active on the current CPU.
+	 */
+	local_coprocessors_flush_release_all();
+#endif
+	/*
+	 * OK - migrate IRQs away from this CPU
+	 */
+	migrate_irqs();
+
+	/*
+	 * Flush user cache and TLB mappings, and then remove this CPU
+	 * from the vm mask set of all processes.
+	 */
+	local_flush_cache_all();
+	local_flush_tlb_all();
+	invalidate_page_directory();
+
+	clear_tasks_mm_cpumask(cpu);
+
+	return 0;
+}
+
+static void platform_cpu_kill(unsigned int cpu)
+{
+	smp_call_function_single(0, mx_cpu_stop, (void *)cpu, true);
+}
+
+/*
+ * called on the thread which is asking for a CPU to be shutdown -
+ * waits until shutdown has completed, or it is timed out.
+ */
+void __cpu_die(unsigned int cpu)
+{
+	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
+	while (time_before(jiffies, timeout)) {
+		system_invalidate_dcache_range((unsigned long)&cpu_start_id,
+					       sizeof(cpu_start_id));
+		/* Pairs with the second memw in the cpu_restart */
+		mb();
+		if (READ_ONCE(cpu_start_id) == -cpu) {
+			platform_cpu_kill(cpu);
+			return;
+		}
+	}
+	pr_err("CPU%u: unable to kill\n", cpu);
+}
+
+void arch_cpu_idle_dead(void)
+{
+	cpu_die();
+}
+/*
+ * Called from the idle thread for the CPU which has been shutdown.
+ *
+ * Note that we disable IRQs here, but do not re-enable them
+ * before returning to the caller. This is also the behaviour
+ * of the other hotplug-cpu capable cores, so presumably coming
+ * out of idle fixes this.
+ */
+void __ref cpu_die(void)
+{
+	idle_task_exit();
+	local_irq_disable();
+	__asm__ __volatile__(
+			"	movi	a2, cpu_restart\n"
+			"	jx	a2\n");
+}
+
+#endif /* CONFIG_HOTPLUG_CPU */
+
+enum ipi_msg_type {
+	IPI_RESCHEDULE = 0,
+	IPI_CALL_FUNC,
+	IPI_CPU_STOP,
+	IPI_MAX
+};
+
+static const struct {
+	const char *short_text;
+	const char *long_text;
+} ipi_text[] = {
+	{ .short_text = "RES", .long_text = "Rescheduling interrupts" },
+	{ .short_text = "CAL", .long_text = "Function call interrupts" },
+	{ .short_text = "DIE", .long_text = "CPU shutdown interrupts" },
+};
+
+struct ipi_data {
+	unsigned long ipi_count[IPI_MAX];
+};
+
+static DEFINE_PER_CPU(struct ipi_data, ipi_data);
+
+static void send_ipi_message(const struct cpumask *callmask,
+		enum ipi_msg_type msg_id)
+{
+	int index;
+	unsigned long mask = 0;
+
+	for_each_cpu(index, callmask)
+		mask |= 1 << index;
+
+	set_er(mask, MIPISET(msg_id));
+}
+
+void arch_send_call_function_ipi_mask(const struct cpumask *mask)
+{
+	send_ipi_message(mask, IPI_CALL_FUNC);
+}
+
+void arch_send_call_function_single_ipi(int cpu)
+{
+	send_ipi_message(cpumask_of(cpu), IPI_CALL_FUNC);
+}
+
+void smp_send_reschedule(int cpu)
+{
+	send_ipi_message(cpumask_of(cpu), IPI_RESCHEDULE);
+}
+
+void smp_send_stop(void)
+{
+	struct cpumask targets;
+
+	cpumask_copy(&targets, cpu_online_mask);
+	cpumask_clear_cpu(smp_processor_id(), &targets);
+	send_ipi_message(&targets, IPI_CPU_STOP);
+}
+
+static void ipi_cpu_stop(unsigned int cpu)
+{
+	set_cpu_online(cpu, false);
+	machine_halt();
+}
+
+irqreturn_t ipi_interrupt(int irq, void *dev_id)
+{
+	unsigned int cpu = smp_processor_id();
+	struct ipi_data *ipi = &per_cpu(ipi_data, cpu);
+
+	for (;;) {
+		unsigned int msg;
+
+		msg = get_er(MIPICAUSE(cpu));
+		set_er(msg, MIPICAUSE(cpu));
+
+		if (!msg)
+			break;
+
+		if (msg & (1 << IPI_CALL_FUNC)) {
+			++ipi->ipi_count[IPI_CALL_FUNC];
+			generic_smp_call_function_interrupt();
+		}
+
+		if (msg & (1 << IPI_RESCHEDULE)) {
+			++ipi->ipi_count[IPI_RESCHEDULE];
+			scheduler_ipi();
+		}
+
+		if (msg & (1 << IPI_CPU_STOP)) {
+			++ipi->ipi_count[IPI_CPU_STOP];
+			ipi_cpu_stop(cpu);
+		}
+	}
+
+	return IRQ_HANDLED;
+}
+
+void show_ipi_list(struct seq_file *p, int prec)
+{
+	unsigned int cpu;
+	unsigned i;
+
+	for (i = 0; i < IPI_MAX; ++i) {
+		seq_printf(p, "%*s:", prec, ipi_text[i].short_text);
+		for_each_online_cpu(cpu)
+			seq_printf(p, " %10lu",
+					per_cpu(ipi_data, cpu).ipi_count[i]);
+		seq_printf(p, "   %s\n", ipi_text[i].long_text);
+	}
+}
+
+int setup_profiling_timer(unsigned int multiplier)
+{
+	pr_debug("setup_profiling_timer %d\n", multiplier);
+	return 0;
+}
+
+/* TLB flush functions */
+
+struct flush_data {
+	struct vm_area_struct *vma;
+	unsigned long addr1;
+	unsigned long addr2;
+};
+
+static void ipi_flush_tlb_all(void *arg)
+{
+	local_flush_tlb_all();
+}
+
+void flush_tlb_all(void)
+{
+	on_each_cpu(ipi_flush_tlb_all, NULL, 1);
+}
+
+static void ipi_flush_tlb_mm(void *arg)
+{
+	local_flush_tlb_mm(arg);
+}
+
+void flush_tlb_mm(struct mm_struct *mm)
+{
+	on_each_cpu(ipi_flush_tlb_mm, mm, 1);
+}
+
+static void ipi_flush_tlb_page(void *arg)
+{
+	struct flush_data *fd = arg;
+	local_flush_tlb_page(fd->vma, fd->addr1);
+}
+
+void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
+{
+	struct flush_data fd = {
+		.vma = vma,
+		.addr1 = addr,
+	};
+	on_each_cpu(ipi_flush_tlb_page, &fd, 1);
+}
+
+static void ipi_flush_tlb_range(void *arg)
+{
+	struct flush_data *fd = arg;
+	local_flush_tlb_range(fd->vma, fd->addr1, fd->addr2);
+}
+
+void flush_tlb_range(struct vm_area_struct *vma,
+		     unsigned long start, unsigned long end)
+{
+	struct flush_data fd = {
+		.vma = vma,
+		.addr1 = start,
+		.addr2 = end,
+	};
+	on_each_cpu(ipi_flush_tlb_range, &fd, 1);
+}
+
+static void ipi_flush_tlb_kernel_range(void *arg)
+{
+	struct flush_data *fd = arg;
+	local_flush_tlb_kernel_range(fd->addr1, fd->addr2);
+}
+
+void flush_tlb_kernel_range(unsigned long start, unsigned long end)
+{
+	struct flush_data fd = {
+		.addr1 = start,
+		.addr2 = end,
+	};
+	on_each_cpu(ipi_flush_tlb_kernel_range, &fd, 1);
+}
+
+/* Cache flush functions */
+
+static void ipi_flush_cache_all(void *arg)
+{
+	local_flush_cache_all();
+}
+
+void flush_cache_all(void)
+{
+	on_each_cpu(ipi_flush_cache_all, NULL, 1);
+}
+
+static void ipi_flush_cache_page(void *arg)
+{
+	struct flush_data *fd = arg;
+	local_flush_cache_page(fd->vma, fd->addr1, fd->addr2);
+}
+
+void flush_cache_page(struct vm_area_struct *vma,
+		     unsigned long address, unsigned long pfn)
+{
+	struct flush_data fd = {
+		.vma = vma,
+		.addr1 = address,
+		.addr2 = pfn,
+	};
+	on_each_cpu(ipi_flush_cache_page, &fd, 1);
+}
+
+static void ipi_flush_cache_range(void *arg)
+{
+	struct flush_data *fd = arg;
+	local_flush_cache_range(fd->vma, fd->addr1, fd->addr2);
+}
+
+void flush_cache_range(struct vm_area_struct *vma,
+		     unsigned long start, unsigned long end)
+{
+	struct flush_data fd = {
+		.vma = vma,
+		.addr1 = start,
+		.addr2 = end,
+	};
+	on_each_cpu(ipi_flush_cache_range, &fd, 1);
+}
+
+static void ipi_flush_icache_range(void *arg)
+{
+	struct flush_data *fd = arg;
+	local_flush_icache_range(fd->addr1, fd->addr2);
+}
+
+void flush_icache_range(unsigned long start, unsigned long end)
+{
+	struct flush_data fd = {
+		.addr1 = start,
+		.addr2 = end,
+	};
+	on_each_cpu(ipi_flush_icache_range, &fd, 1);
+}
+EXPORT_SYMBOL(flush_icache_range);
+
+/* ------------------------------------------------------------------------- */
+
+static void ipi_invalidate_dcache_range(void *arg)
+{
+	struct flush_data *fd = arg;
+	__invalidate_dcache_range(fd->addr1, fd->addr2);
+}
+
+static void system_invalidate_dcache_range(unsigned long start,
+		unsigned long size)
+{
+	struct flush_data fd = {
+		.addr1 = start,
+		.addr2 = size,
+	};
+	on_each_cpu(ipi_invalidate_dcache_range, &fd, 1);
+}
+
+static void ipi_flush_invalidate_dcache_range(void *arg)
+{
+	struct flush_data *fd = arg;
+	__flush_invalidate_dcache_range(fd->addr1, fd->addr2);
+}
+
+static void system_flush_invalidate_dcache_range(unsigned long start,
+		unsigned long size)
+{
+	struct flush_data fd = {
+		.addr1 = start,
+		.addr2 = size,
+	};
+	on_each_cpu(ipi_flush_invalidate_dcache_range, &fd, 1);
+}
diff --git a/arch/xtensa/kernel/stacktrace.c b/arch/xtensa/kernel/stacktrace.c
new file mode 100644
index 000000000..7f7755cd2
--- /dev/null
+++ b/arch/xtensa/kernel/stacktrace.c
@@ -0,0 +1,275 @@
+/*
+ * Kernel and userspace stack tracing.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2013 Tensilica Inc.
+ * Copyright (C) 2015 Cadence Design Systems Inc.
+ */
+#include <linux/export.h>
+#include <linux/sched.h>
+#include <linux/stacktrace.h>
+
+#include <asm/stacktrace.h>
+#include <asm/traps.h>
+#include <linux/uaccess.h>
+
+#if IS_ENABLED(CONFIG_PERF_EVENTS)
+
+/* Address of common_exception_return, used to check the
+ * transition from kernel to user space.
+ */
+extern int common_exception_return;
+
+void xtensa_backtrace_user(struct pt_regs *regs, unsigned int depth,
+			   int (*ufn)(struct stackframe *frame, void *data),
+			   void *data)
+{
+	unsigned long windowstart = regs->windowstart;
+	unsigned long windowbase = regs->windowbase;
+	unsigned long a0 = regs->areg[0];
+	unsigned long a1 = regs->areg[1];
+	unsigned long pc = regs->pc;
+	struct stackframe frame;
+	int index;
+
+	if (!depth--)
+		return;
+
+	frame.pc = pc;
+	frame.sp = a1;
+
+	if (pc == 0 || pc >= TASK_SIZE || ufn(&frame, data))
+		return;
+
+	if (IS_ENABLED(CONFIG_USER_ABI_CALL0_ONLY) ||
+	    (IS_ENABLED(CONFIG_USER_ABI_CALL0_PROBE) &&
+	     !(regs->ps & PS_WOE_MASK)))
+		return;
+
+	/* Two steps:
+	 *
+	 * 1. Look through the register window for the
+	 * previous PCs in the call trace.
+	 *
+	 * 2. Look on the stack.
+	 */
+
+	/* Step 1.  */
+	/* Rotate WINDOWSTART to move the bit corresponding to
+	 * the current window to the bit #0.
+	 */
+	windowstart = (windowstart << WSBITS | windowstart) >> windowbase;
+
+	/* Look for bits that are set, they correspond to
+	 * valid windows.
+	 */
+	for (index = WSBITS - 1; (index > 0) && depth; depth--, index--)
+		if (windowstart & (1 << index)) {
+			/* Get the PC from a0 and a1. */
+			pc = MAKE_PC_FROM_RA(a0, pc);
+			/* Read a0 and a1 from the
+			 * corresponding position in AREGs.
+			 */
+			a0 = regs->areg[index * 4];
+			a1 = regs->areg[index * 4 + 1];
+
+			frame.pc = pc;
+			frame.sp = a1;
+
+			if (pc == 0 || pc >= TASK_SIZE || ufn(&frame, data))
+				return;
+		}
+
+	/* Step 2. */
+	/* We are done with the register window, we need to
+	 * look through the stack.
+	 */
+	if (!depth)
+		return;
+
+	/* Start from the a1 register. */
+	/* a1 = regs->areg[1]; */
+	while (a0 != 0 && depth--) {
+		pc = MAKE_PC_FROM_RA(a0, pc);
+
+		/* Check if the region is OK to access. */
+		if (!access_ok(&SPILL_SLOT(a1, 0), 8))
+			return;
+		/* Copy a1, a0 from user space stack frame. */
+		if (__get_user(a0, &SPILL_SLOT(a1, 0)) ||
+		    __get_user(a1, &SPILL_SLOT(a1, 1)))
+			return;
+
+		frame.pc = pc;
+		frame.sp = a1;
+
+		if (pc == 0 || pc >= TASK_SIZE || ufn(&frame, data))
+			return;
+	}
+}
+EXPORT_SYMBOL(xtensa_backtrace_user);
+
+void xtensa_backtrace_kernel(struct pt_regs *regs, unsigned int depth,
+			     int (*kfn)(struct stackframe *frame, void *data),
+			     int (*ufn)(struct stackframe *frame, void *data),
+			     void *data)
+{
+	unsigned long pc = regs->depc > VALID_DOUBLE_EXCEPTION_ADDRESS ?
+		regs->depc : regs->pc;
+	unsigned long sp_start, sp_end;
+	unsigned long a0 = regs->areg[0];
+	unsigned long a1 = regs->areg[1];
+
+	sp_start = a1 & ~(THREAD_SIZE - 1);
+	sp_end = sp_start + THREAD_SIZE;
+
+	/* Spill the register window to the stack first. */
+	spill_registers();
+
+	/* Read the stack frames one by one and create the PC
+	 * from the a0 and a1 registers saved there.
+	 */
+	while (a1 > sp_start && a1 < sp_end && depth--) {
+		struct stackframe frame;
+
+		frame.pc = pc;
+		frame.sp = a1;
+
+		if (kernel_text_address(pc) && kfn(&frame, data))
+			return;
+
+		if (pc == (unsigned long)&common_exception_return) {
+			regs = (struct pt_regs *)a1;
+			if (user_mode(regs)) {
+				if (ufn == NULL)
+					return;
+				xtensa_backtrace_user(regs, depth, ufn, data);
+				return;
+			}
+			a0 = regs->areg[0];
+			a1 = regs->areg[1];
+			continue;
+		}
+
+		sp_start = a1;
+
+		pc = MAKE_PC_FROM_RA(a0, pc);
+		a0 = SPILL_SLOT(a1, 0);
+		a1 = SPILL_SLOT(a1, 1);
+	}
+}
+EXPORT_SYMBOL(xtensa_backtrace_kernel);
+
+#endif
+
+void walk_stackframe(unsigned long *sp,
+		int (*fn)(struct stackframe *frame, void *data),
+		void *data)
+{
+	unsigned long a0, a1;
+	unsigned long sp_end;
+
+	a1 = (unsigned long)sp;
+	sp_end = ALIGN(a1, THREAD_SIZE);
+
+	spill_registers();
+
+	while (a1 < sp_end) {
+		struct stackframe frame;
+
+		sp = (unsigned long *)a1;
+
+		a0 = SPILL_SLOT(a1, 0);
+		a1 = SPILL_SLOT(a1, 1);
+
+		if (a1 <= (unsigned long)sp)
+			break;
+
+		frame.pc = MAKE_PC_FROM_RA(a0, a1);
+		frame.sp = a1;
+
+		if (fn(&frame, data))
+			return;
+	}
+}
+
+#ifdef CONFIG_STACKTRACE
+
+struct stack_trace_data {
+	struct stack_trace *trace;
+	unsigned skip;
+};
+
+static int stack_trace_cb(struct stackframe *frame, void *data)
+{
+	struct stack_trace_data *trace_data = data;
+	struct stack_trace *trace = trace_data->trace;
+
+	if (trace_data->skip) {
+		--trace_data->skip;
+		return 0;
+	}
+	if (!kernel_text_address(frame->pc))
+		return 0;
+
+	trace->entries[trace->nr_entries++] = frame->pc;
+	return trace->nr_entries >= trace->max_entries;
+}
+
+void save_stack_trace_tsk(struct task_struct *task, struct stack_trace *trace)
+{
+	struct stack_trace_data trace_data = {
+		.trace = trace,
+		.skip = trace->skip,
+	};
+	walk_stackframe(stack_pointer(task), stack_trace_cb, &trace_data);
+}
+EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
+
+void save_stack_trace(struct stack_trace *trace)
+{
+	save_stack_trace_tsk(current, trace);
+}
+EXPORT_SYMBOL_GPL(save_stack_trace);
+
+#endif
+
+#ifdef CONFIG_FRAME_POINTER
+
+struct return_addr_data {
+	unsigned long addr;
+	unsigned skip;
+};
+
+static int return_address_cb(struct stackframe *frame, void *data)
+{
+	struct return_addr_data *r = data;
+
+	if (r->skip) {
+		--r->skip;
+		return 0;
+	}
+	if (!kernel_text_address(frame->pc))
+		return 0;
+	r->addr = frame->pc;
+	return 1;
+}
+
+/*
+ * level == 0 is for the return address from the caller of this function,
+ * not from this function itself.
+ */
+unsigned long return_address(unsigned level)
+{
+	struct return_addr_data r = {
+		.skip = level,
+	};
+	walk_stackframe(stack_pointer(NULL), return_address_cb, &r);
+	return r.addr;
+}
+EXPORT_SYMBOL(return_address);
+
+#endif
diff --git a/arch/xtensa/kernel/syscall.c b/arch/xtensa/kernel/syscall.c
new file mode 100644
index 000000000..b3c2450d6
--- /dev/null
+++ b/arch/xtensa/kernel/syscall.c
@@ -0,0 +1,99 @@
+/*
+ * arch/xtensa/kernel/syscall.c
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ * Copyright (C) 2000 Silicon Graphics, Inc.
+ * Copyright (C) 1995 - 2000 by Ralf Baechle
+ *
+ * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com>
+ * Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca>
+ * Chris Zankel <chris@zankel.net>
+ * Kevin Chea
+ *
+ */
+#include <linux/uaccess.h>
+#include <asm/syscall.h>
+#include <linux/linkage.h>
+#include <linux/stringify.h>
+#include <linux/errno.h>
+#include <linux/syscalls.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/mman.h>
+#include <linux/sched/mm.h>
+#include <linux/shm.h>
+
+syscall_t sys_call_table[] /* FIXME __cacheline_aligned */= {
+#define __SYSCALL(nr, entry)	(syscall_t)entry,
+#include <asm/syscall_table.h>
+};
+
+#define COLOUR_ALIGN(addr, pgoff) \
+	((((addr) + SHMLBA - 1) & ~(SHMLBA - 1)) + \
+	 (((pgoff) << PAGE_SHIFT) & (SHMLBA - 1)))
+
+asmlinkage long xtensa_shmat(int shmid, char __user *shmaddr, int shmflg)
+{
+	unsigned long ret;
+	long err;
+
+	err = do_shmat(shmid, shmaddr, shmflg, &ret, SHMLBA);
+	if (err)
+		return err;
+	return (long)ret;
+}
+
+asmlinkage long xtensa_fadvise64_64(int fd, int advice,
+		unsigned long long offset, unsigned long long len)
+{
+	return ksys_fadvise64_64(fd, offset, len, advice);
+}
+
+#ifdef CONFIG_MMU
+unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
+		unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+	struct vm_area_struct *vmm;
+	struct vma_iterator vmi;
+
+	if (flags & MAP_FIXED) {
+		/* We do not accept a shared mapping if it would violate
+		 * cache aliasing constraints.
+		 */
+		if ((flags & MAP_SHARED) &&
+				((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
+			return -EINVAL;
+		return addr;
+	}
+
+	if (len > TASK_SIZE)
+		return -ENOMEM;
+	if (!addr)
+		addr = TASK_UNMAPPED_BASE;
+
+	if (flags & MAP_SHARED)
+		addr = COLOUR_ALIGN(addr, pgoff);
+	else
+		addr = PAGE_ALIGN(addr);
+
+	vma_iter_init(&vmi, current->mm, addr);
+	for_each_vma(vmi, vmm) {
+		/* At this point:  (addr < vmm->vm_end). */
+		if (addr + len <= vm_start_gap(vmm))
+			break;
+
+		addr = vmm->vm_end;
+		if (flags & MAP_SHARED)
+			addr = COLOUR_ALIGN(addr, pgoff);
+	}
+
+	if (TASK_SIZE - len < addr)
+		return -ENOMEM;
+
+	return addr;
+}
+#endif
diff --git a/arch/xtensa/kernel/syscalls/Makefile b/arch/xtensa/kernel/syscalls/Makefile
new file mode 100644
index 000000000..b265e4bc1
--- /dev/null
+++ b/arch/xtensa/kernel/syscalls/Makefile
@@ -0,0 +1,32 @@
+# SPDX-License-Identifier: GPL-2.0
+kapi := arch/$(SRCARCH)/include/generated/asm
+uapi := arch/$(SRCARCH)/include/generated/uapi/asm
+
+$(shell mkdir -p $(uapi) $(kapi))
+
+syscall := $(src)/syscall.tbl
+syshdr := $(srctree)/scripts/syscallhdr.sh
+systbl := $(srctree)/scripts/syscalltbl.sh
+
+quiet_cmd_syshdr = SYSHDR  $@
+      cmd_syshdr = $(CONFIG_SHELL) $(syshdr) --emit-nr $< $@
+
+quiet_cmd_systbl = SYSTBL  $@
+      cmd_systbl = $(CONFIG_SHELL) $(systbl) $< $@
+
+$(uapi)/unistd_32.h: $(syscall) $(syshdr) FORCE
+	$(call if_changed,syshdr)
+
+$(kapi)/syscall_table.h: $(syscall) $(systbl) FORCE
+	$(call if_changed,systbl)
+
+uapisyshdr-y		+= unistd_32.h
+kapisyshdr-y		+= syscall_table.h
+
+uapisyshdr-y	:= $(addprefix $(uapi)/, $(uapisyshdr-y))
+kapisyshdr-y	:= $(addprefix $(kapi)/, $(kapisyshdr-y))
+targets		+= $(addprefix ../../../../, $(uapisyshdr-y) $(kapisyshdr-y))
+
+PHONY += all
+all: $(uapisyshdr-y) $(kapisyshdr-y)
+	@:
diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel/syscalls/syscall.tbl
new file mode 100644
index 000000000..52c94ab5c
--- /dev/null
+++ b/arch/xtensa/kernel/syscalls/syscall.tbl
@@ -0,0 +1,423 @@
+# SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
+#
+# system call numbers and entry vectors for xtensa
+#
+# The format is:
+# <number> <abi> <name> <entry point>
+#
+# The <abi> is always "common" for this file
+#
+0	common	spill				sys_ni_syscall
+1	common	xtensa				sys_ni_syscall
+2	common	available4			sys_ni_syscall
+3	common	available5			sys_ni_syscall
+4	common	available6			sys_ni_syscall
+5	common	available7			sys_ni_syscall
+6	common	available8			sys_ni_syscall
+7	common	available9			sys_ni_syscall
+# File Operations
+8	common	open				sys_open
+9	common	close				sys_close
+10	common	dup				sys_dup
+11	common	dup2				sys_dup2
+12	common	read				sys_read
+13	common	write				sys_write
+14	common	select				sys_select
+15	common	lseek				sys_lseek
+16	common	poll				sys_poll
+17	common	_llseek				sys_llseek
+18	common	epoll_wait			sys_epoll_wait
+19	common	epoll_ctl			sys_epoll_ctl
+20	common	epoll_create			sys_epoll_create
+21	common	creat				sys_creat
+22	common	truncate			sys_truncate
+23	common	ftruncate			sys_ftruncate
+24	common	readv				sys_readv
+25	common	writev				sys_writev
+26	common	fsync				sys_fsync
+27	common	fdatasync			sys_fdatasync
+28	common	truncate64			sys_truncate64
+29	common	ftruncate64			sys_ftruncate64
+30	common	pread64				sys_pread64
+31	common	pwrite64			sys_pwrite64
+32	common	link				sys_link
+33	common	rename				sys_rename
+34	common	symlink				sys_symlink
+35	common	readlink			sys_readlink
+36	common	mknod				sys_mknod
+37	common	pipe				sys_pipe
+38	common	unlink				sys_unlink
+39	common	rmdir				sys_rmdir
+40	common	mkdir				sys_mkdir
+41	common	chdir				sys_chdir
+42	common	fchdir				sys_fchdir
+43	common	getcwd				sys_getcwd
+44	common	chmod				sys_chmod
+45	common	chown				sys_chown
+46	common	stat				sys_newstat
+47	common	stat64				sys_stat64
+48	common	lchown				sys_lchown
+49	common	lstat				sys_newlstat
+50	common	lstat64				sys_lstat64
+51	common	available51			sys_ni_syscall
+52	common	fchmod				sys_fchmod
+53	common	fchown				sys_fchown
+54	common	fstat				sys_newfstat
+55	common	fstat64				sys_fstat64
+56	common	flock				sys_flock
+57	common	access				sys_access
+58	common	umask				sys_umask
+59	common	getdents			sys_getdents
+60	common	getdents64			sys_getdents64
+61	common	fcntl64				sys_fcntl64
+62	common	fallocate			sys_fallocate
+63	common	fadvise64_64			xtensa_fadvise64_64
+64	common	utime				sys_utime32
+65	common	utimes				sys_utimes_time32
+66	common	ioctl				sys_ioctl
+67	common	fcntl				sys_fcntl
+68	common	setxattr			sys_setxattr
+69	common	getxattr			sys_getxattr
+70	common	listxattr			sys_listxattr
+71	common	removexattr			sys_removexattr
+72	common	lsetxattr			sys_lsetxattr
+73	common	lgetxattr			sys_lgetxattr
+74	common	llistxattr			sys_llistxattr
+75	common	lremovexattr			sys_lremovexattr
+76	common	fsetxattr			sys_fsetxattr
+77	common	fgetxattr			sys_fgetxattr
+78	common	flistxattr			sys_flistxattr
+79	common	fremovexattr			sys_fremovexattr
+# File Map / Shared Memory Operations
+80	common	mmap2				sys_mmap_pgoff
+81	common	munmap				sys_munmap
+82	common	mprotect			sys_mprotect
+83	common	brk				sys_brk
+84	common	mlock				sys_mlock
+85	common	munlock				sys_munlock
+86	common	mlockall			sys_mlockall
+87	common	munlockall			sys_munlockall
+88	common	mremap				sys_mremap
+89	common	msync				sys_msync
+90	common	mincore				sys_mincore
+91	common	madvise				sys_madvise
+92	common	shmget				sys_shmget
+93	common	shmat				xtensa_shmat
+94	common	shmctl				sys_old_shmctl
+95	common	shmdt				sys_shmdt
+# Socket Operations
+96	common	socket				sys_socket
+97	common	setsockopt			sys_setsockopt
+98	common	getsockopt			sys_getsockopt
+99	common	shutdown			sys_shutdown
+100	common	bind				sys_bind
+101	common	connect				sys_connect
+102	common	listen				sys_listen
+103	common	accept				sys_accept
+104	common	getsockname			sys_getsockname
+105	common	getpeername			sys_getpeername
+106	common	sendmsg				sys_sendmsg
+107	common	recvmsg				sys_recvmsg
+108	common	send				sys_send
+109	common	recv				sys_recv
+110	common	sendto				sys_sendto
+111	common	recvfrom			sys_recvfrom
+112	common	socketpair			sys_socketpair
+113	common	sendfile			sys_sendfile
+114	common	sendfile64			sys_sendfile64
+115	common	sendmmsg			sys_sendmmsg
+# Process Operations
+116	common	clone				sys_clone
+117	common	execve				sys_execve
+118	common	exit				sys_exit
+119	common	exit_group			sys_exit_group
+120	common	getpid				sys_getpid
+121	common	wait4				sys_wait4
+122	common	waitid				sys_waitid
+123	common	kill				sys_kill
+124	common	tkill				sys_tkill
+125	common	tgkill				sys_tgkill
+126	common	set_tid_address			sys_set_tid_address
+127	common	gettid				sys_gettid
+128	common	setsid				sys_setsid
+129	common	getsid				sys_getsid
+130	common	prctl				sys_prctl
+131	common	personality			sys_personality
+132	common	getpriority			sys_getpriority
+133	common	setpriority			sys_setpriority
+134	common	setitimer			sys_setitimer
+135	common	getitimer			sys_getitimer
+136	common	setuid				sys_setuid
+137	common	getuid				sys_getuid
+138	common	setgid				sys_setgid
+139	common	getgid				sys_getgid
+140	common	geteuid				sys_geteuid
+141	common	getegid				sys_getegid
+142	common	setreuid			sys_setreuid
+143	common	setregid			sys_setregid
+144	common	setresuid			sys_setresuid
+145	common	getresuid			sys_getresuid
+146	common	setresgid			sys_setresgid
+147	common	getresgid			sys_getresgid
+148	common	setpgid				sys_setpgid
+149	common	getpgid				sys_getpgid
+150	common	getppid				sys_getppid
+151	common	getpgrp				sys_getpgrp
+# 152 was set_thread_area
+152	common	reserved152			sys_ni_syscall
+# 153 was get_thread_area
+153	common	reserved153			sys_ni_syscall
+154	common	times				sys_times
+155	common	acct				sys_acct
+156	common	sched_setaffinity		sys_sched_setaffinity
+157	common	sched_getaffinity		sys_sched_getaffinity
+158	common	capget				sys_capget
+159	common	capset				sys_capset
+160	common	ptrace				sys_ptrace
+161	common	semtimedop			sys_semtimedop_time32
+162	common	semget				sys_semget
+163	common	semop				sys_semop
+164	common	semctl				sys_old_semctl
+165	common	available165			sys_ni_syscall
+166	common	msgget				sys_msgget
+167	common	msgsnd				sys_msgsnd
+168	common	msgrcv				sys_msgrcv
+169	common	msgctl				sys_old_msgctl
+170	common	available170			sys_ni_syscall
+# File System
+171	common	umount2				sys_umount
+172	common	mount				sys_mount
+173	common	swapon				sys_swapon
+174	common	chroot				sys_chroot
+175	common	pivot_root			sys_pivot_root
+176	common	umount				sys_oldumount
+177	common	swapoff				sys_swapoff
+178	common	sync				sys_sync
+179	common	syncfs				sys_syncfs
+180	common	setfsuid			sys_setfsuid
+181	common	setfsgid			sys_setfsgid
+182	common	sysfs				sys_sysfs
+183	common	ustat				sys_ustat
+184	common	statfs				sys_statfs
+185	common	fstatfs				sys_fstatfs
+186	common	statfs64			sys_statfs64
+187	common	fstatfs64			sys_fstatfs64
+# System
+188	common	setrlimit			sys_setrlimit
+189	common	getrlimit			sys_getrlimit
+190	common	getrusage			sys_getrusage
+191	common	futex				sys_futex_time32
+192	common	gettimeofday			sys_gettimeofday
+193	common	settimeofday			sys_settimeofday
+194	common	adjtimex			sys_adjtimex_time32
+195	common	nanosleep			sys_nanosleep_time32
+196	common	getgroups			sys_getgroups
+197	common	setgroups			sys_setgroups
+198	common	sethostname			sys_sethostname
+199	common	setdomainname			sys_setdomainname
+200	common	syslog				sys_syslog
+201	common	vhangup				sys_vhangup
+202	common	uselib				sys_uselib
+203	common	reboot				sys_reboot
+204	common	quotactl			sys_quotactl
+# 205 was old nfsservctl
+205	common	nfsservctl			sys_ni_syscall
+206	common	_sysctl				sys_ni_syscall
+207	common	bdflush				sys_ni_syscall
+208	common	uname				sys_newuname
+209	common	sysinfo				sys_sysinfo
+210	common	init_module			sys_init_module
+211	common	delete_module			sys_delete_module
+212	common	sched_setparam			sys_sched_setparam
+213	common	sched_getparam			sys_sched_getparam
+214	common	sched_setscheduler		sys_sched_setscheduler
+215	common	sched_getscheduler		sys_sched_getscheduler
+216	common	sched_get_priority_max		sys_sched_get_priority_max
+217	common	sched_get_priority_min		sys_sched_get_priority_min
+218	common	sched_rr_get_interval		sys_sched_rr_get_interval_time32
+219	common	sched_yield			sys_sched_yield
+222	common	available222			sys_ni_syscall
+# Signal Handling
+223	common	restart_syscall			sys_restart_syscall
+224	common	sigaltstack			sys_sigaltstack
+225	common	rt_sigreturn			xtensa_rt_sigreturn
+226	common	rt_sigaction			sys_rt_sigaction
+227	common	rt_sigprocmask			sys_rt_sigprocmask
+228	common	rt_sigpending			sys_rt_sigpending
+229	common	rt_sigtimedwait			sys_rt_sigtimedwait_time32
+230	common	rt_sigqueueinfo			sys_rt_sigqueueinfo
+231	common	rt_sigsuspend			sys_rt_sigsuspend
+# Message
+232	common	mq_open				sys_mq_open
+233	common	mq_unlink			sys_mq_unlink
+234	common	mq_timedsend			sys_mq_timedsend_time32
+235	common	mq_timedreceive			sys_mq_timedreceive_time32
+236	common	mq_notify			sys_mq_notify
+237	common	mq_getsetattr			sys_mq_getsetattr
+238	common	available238			sys_ni_syscall
+239	common	io_setup			sys_io_setup
+# IO
+240	common	io_destroy			sys_io_destroy
+241	common	io_submit			sys_io_submit
+242	common	io_getevents			sys_io_getevents_time32
+243	common	io_cancel			sys_io_cancel
+244	common	clock_settime			sys_clock_settime32
+245	common	clock_gettime			sys_clock_gettime32
+246	common	clock_getres			sys_clock_getres_time32
+247	common	clock_nanosleep			sys_clock_nanosleep_time32
+# Timer
+248	common	timer_create			sys_timer_create
+249	common	timer_delete			sys_timer_delete
+250	common	timer_settime			sys_timer_settime32
+251	common	timer_gettime			sys_timer_gettime32
+252	common	timer_getoverrun		sys_timer_getoverrun
+# System
+253	common	reserved253			sys_ni_syscall
+254	common	lookup_dcookie			sys_lookup_dcookie
+255	common	available255			sys_ni_syscall
+256	common	add_key				sys_add_key
+257	common	request_key			sys_request_key
+258	common	keyctl				sys_keyctl
+259	common	available259			sys_ni_syscall
+260	common	readahead			sys_readahead
+261	common	remap_file_pages		sys_remap_file_pages
+262	common	migrate_pages			sys_migrate_pages
+263	common	mbind				sys_mbind
+264	common	get_mempolicy			sys_get_mempolicy
+265	common	set_mempolicy			sys_set_mempolicy
+266	common	unshare				sys_unshare
+267	common	move_pages			sys_move_pages
+268	common	splice				sys_splice
+269	common	tee				sys_tee
+270	common	vmsplice			sys_vmsplice
+271	common	available271			sys_ni_syscall
+272	common	pselect6			sys_pselect6_time32
+273	common	ppoll				sys_ppoll_time32
+274	common	epoll_pwait			sys_epoll_pwait
+275	common	epoll_create1			sys_epoll_create1
+276	common	inotify_init			sys_inotify_init
+277	common	inotify_add_watch		sys_inotify_add_watch
+278	common	inotify_rm_watch		sys_inotify_rm_watch
+279	common	inotify_init1			sys_inotify_init1
+280	common	getcpu				sys_getcpu
+281	common	kexec_load			sys_ni_syscall
+282	common	ioprio_set			sys_ioprio_set
+283	common	ioprio_get			sys_ioprio_get
+284	common	set_robust_list			sys_set_robust_list
+285	common	get_robust_list			sys_get_robust_list
+286	common	available286			sys_ni_syscall
+287	common	available287			sys_ni_syscall
+# Relative File Operations
+288	common	openat				sys_openat
+289	common	mkdirat				sys_mkdirat
+290	common	mknodat				sys_mknodat
+291	common	unlinkat			sys_unlinkat
+292	common	renameat			sys_renameat
+293	common	linkat				sys_linkat
+294	common	symlinkat			sys_symlinkat
+295	common	readlinkat			sys_readlinkat
+296	common	utimensat			sys_utimensat_time32
+297	common	fchownat			sys_fchownat
+298	common	futimesat			sys_futimesat_time32
+299	common	fstatat64			sys_fstatat64
+300	common	fchmodat			sys_fchmodat
+301	common	faccessat			sys_faccessat
+302	common	available302			sys_ni_syscall
+303	common	available303			sys_ni_syscall
+304	common	signalfd			sys_signalfd
+# 305 was timerfd
+306	common	eventfd				sys_eventfd
+307	common	recvmmsg			sys_recvmmsg_time32
+308	common	setns				sys_setns
+309	common	signalfd4			sys_signalfd4
+310	common	dup3				sys_dup3
+311	common	pipe2				sys_pipe2
+312	common	timerfd_create			sys_timerfd_create
+313	common	timerfd_settime			sys_timerfd_settime32
+314	common	timerfd_gettime			sys_timerfd_gettime32
+315	common	available315			sys_ni_syscall
+316	common	eventfd2			sys_eventfd2
+317	common	preadv				sys_preadv
+318	common	pwritev				sys_pwritev
+319	common	available319			sys_ni_syscall
+320	common	fanotify_init			sys_fanotify_init
+321	common	fanotify_mark			sys_fanotify_mark
+322	common	process_vm_readv		sys_process_vm_readv
+323	common	process_vm_writev		sys_process_vm_writev
+324	common	name_to_handle_at		sys_name_to_handle_at
+325	common	open_by_handle_at		sys_open_by_handle_at
+326	common	sync_file_range2		sys_sync_file_range2
+327	common	perf_event_open			sys_perf_event_open
+328	common	rt_tgsigqueueinfo		sys_rt_tgsigqueueinfo
+329	common	clock_adjtime			sys_clock_adjtime32
+330	common	prlimit64			sys_prlimit64
+331	common	kcmp				sys_kcmp
+332	common	finit_module			sys_finit_module
+333	common	accept4				sys_accept4
+334	common	sched_setattr			sys_sched_setattr
+335	common	sched_getattr			sys_sched_getattr
+336	common	renameat2			sys_renameat2
+337	common	seccomp				sys_seccomp
+338	common	getrandom			sys_getrandom
+339	common	memfd_create			sys_memfd_create
+340	common	bpf				sys_bpf
+341	common	execveat			sys_execveat
+342	common	userfaultfd			sys_userfaultfd
+343	common	membarrier			sys_membarrier
+344	common	mlock2				sys_mlock2
+345	common	copy_file_range			sys_copy_file_range
+346	common	preadv2				sys_preadv2
+347	common	pwritev2			sys_pwritev2
+348	common	pkey_mprotect			sys_pkey_mprotect
+349	common	pkey_alloc			sys_pkey_alloc
+350	common	pkey_free			sys_pkey_free
+351	common	statx				sys_statx
+352	common	rseq				sys_rseq
+# 353 through 402 are unassigned to sync up with generic numbers
+403	common	clock_gettime64			sys_clock_gettime
+404	common	clock_settime64			sys_clock_settime
+405	common	clock_adjtime64			sys_clock_adjtime
+406	common	clock_getres_time64		sys_clock_getres
+407	common	clock_nanosleep_time64		sys_clock_nanosleep
+408	common	timer_gettime64			sys_timer_gettime
+409	common	timer_settime64			sys_timer_settime
+410	common	timerfd_gettime64		sys_timerfd_gettime
+411	common	timerfd_settime64		sys_timerfd_settime
+412	common	utimensat_time64		sys_utimensat
+413	common	pselect6_time64			sys_pselect6
+414	common	ppoll_time64			sys_ppoll
+416	common	io_pgetevents_time64		sys_io_pgetevents
+417	common	recvmmsg_time64			sys_recvmmsg
+418	common	mq_timedsend_time64		sys_mq_timedsend
+419	common	mq_timedreceive_time64		sys_mq_timedreceive
+420	common	semtimedop_time64		sys_semtimedop
+421	common	rt_sigtimedwait_time64		sys_rt_sigtimedwait
+422	common	futex_time64			sys_futex
+423	common	sched_rr_get_interval_time64	sys_sched_rr_get_interval
+424	common	pidfd_send_signal		sys_pidfd_send_signal
+425	common	io_uring_setup			sys_io_uring_setup
+426	common	io_uring_enter			sys_io_uring_enter
+427	common	io_uring_register		sys_io_uring_register
+428	common	open_tree			sys_open_tree
+429	common	move_mount			sys_move_mount
+430	common	fsopen				sys_fsopen
+431	common	fsconfig			sys_fsconfig
+432	common	fsmount				sys_fsmount
+433	common	fspick				sys_fspick
+434	common	pidfd_open			sys_pidfd_open
+435	common	clone3				sys_clone3
+436	common	close_range			sys_close_range
+437	common	openat2				sys_openat2
+438	common	pidfd_getfd			sys_pidfd_getfd
+439	common	faccessat2			sys_faccessat2
+440	common	process_madvise			sys_process_madvise
+441	common	epoll_pwait2			sys_epoll_pwait2
+442	common	mount_setattr			sys_mount_setattr
+443	common	quotactl_fd			sys_quotactl_fd
+444	common	landlock_create_ruleset		sys_landlock_create_ruleset
+445	common	landlock_add_rule		sys_landlock_add_rule
+446	common	landlock_restrict_self		sys_landlock_restrict_self
+# 447 reserved for memfd_secret
+448	common	process_mrelease		sys_process_mrelease
+449	common  futex_waitv                     sys_futex_waitv
+450	common	set_mempolicy_home_node		sys_set_mempolicy_home_node
diff --git a/arch/xtensa/kernel/time.c b/arch/xtensa/kernel/time.c
new file mode 100644
index 000000000..16b8a6273
--- /dev/null
+++ b/arch/xtensa/kernel/time.c
@@ -0,0 +1,214 @@
+/*
+ * arch/xtensa/kernel/time.c
+ *
+ * Timer and clock support.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2005 Tensilica Inc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ */
+
+#include <linux/clk.h>
+#include <linux/of_clk.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/time.h>
+#include <linux/clocksource.h>
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/profile.h>
+#include <linux/delay.h>
+#include <linux/irqdomain.h>
+#include <linux/sched_clock.h>
+
+#include <asm/timex.h>
+#include <asm/platform.h>
+
+unsigned long ccount_freq;		/* ccount Hz */
+EXPORT_SYMBOL(ccount_freq);
+
+static u64 ccount_read(struct clocksource *cs)
+{
+	return (u64)get_ccount();
+}
+
+static u64 notrace ccount_sched_clock_read(void)
+{
+	return get_ccount();
+}
+
+static struct clocksource ccount_clocksource = {
+	.name = "ccount",
+	.rating = 200,
+	.read = ccount_read,
+	.mask = CLOCKSOURCE_MASK(32),
+	.flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+struct ccount_timer {
+	struct clock_event_device evt;
+	int irq_enabled;
+	char name[24];
+};
+
+static int ccount_timer_set_next_event(unsigned long delta,
+		struct clock_event_device *dev)
+{
+	unsigned long flags, next;
+	int ret = 0;
+
+	local_irq_save(flags);
+	next = get_ccount() + delta;
+	set_linux_timer(next);
+	if (next - get_ccount() > delta)
+		ret = -ETIME;
+	local_irq_restore(flags);
+
+	return ret;
+}
+
+/*
+ * There is no way to disable the timer interrupt at the device level,
+ * only at the intenable register itself. Since enable_irq/disable_irq
+ * calls are nested, we need to make sure that these calls are
+ * balanced.
+ */
+static int ccount_timer_shutdown(struct clock_event_device *evt)
+{
+	struct ccount_timer *timer =
+		container_of(evt, struct ccount_timer, evt);
+
+	if (timer->irq_enabled) {
+		disable_irq_nosync(evt->irq);
+		timer->irq_enabled = 0;
+	}
+	return 0;
+}
+
+static int ccount_timer_set_oneshot(struct clock_event_device *evt)
+{
+	struct ccount_timer *timer =
+		container_of(evt, struct ccount_timer, evt);
+
+	if (!timer->irq_enabled) {
+		enable_irq(evt->irq);
+		timer->irq_enabled = 1;
+	}
+	return 0;
+}
+
+static DEFINE_PER_CPU(struct ccount_timer, ccount_timer) = {
+	.evt = {
+		.features = CLOCK_EVT_FEAT_ONESHOT,
+		.rating = 300,
+		.set_next_event = ccount_timer_set_next_event,
+		.set_state_shutdown = ccount_timer_shutdown,
+		.set_state_oneshot = ccount_timer_set_oneshot,
+		.tick_resume = ccount_timer_set_oneshot,
+	},
+};
+
+static irqreturn_t timer_interrupt(int irq, void *dev_id)
+{
+	struct clock_event_device *evt = &this_cpu_ptr(&ccount_timer)->evt;
+
+	set_linux_timer(get_linux_timer());
+	evt->event_handler(evt);
+
+	/* Allow platform to do something useful (Wdog). */
+	platform_heartbeat();
+
+	return IRQ_HANDLED;
+}
+
+void local_timer_setup(unsigned cpu)
+{
+	struct ccount_timer *timer = &per_cpu(ccount_timer, cpu);
+	struct clock_event_device *clockevent = &timer->evt;
+
+	timer->irq_enabled = 1;
+	snprintf(timer->name, sizeof(timer->name), "ccount_clockevent_%u", cpu);
+	clockevent->name = timer->name;
+	clockevent->cpumask = cpumask_of(cpu);
+	clockevent->irq = irq_create_mapping(NULL, LINUX_TIMER_INT);
+	if (WARN(!clockevent->irq, "error: can't map timer irq"))
+		return;
+	clockevents_config_and_register(clockevent, ccount_freq,
+					0xf, 0xffffffff);
+}
+
+#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
+#ifdef CONFIG_OF
+static void __init calibrate_ccount(void)
+{
+	struct device_node *cpu;
+	struct clk *clk;
+
+	cpu = of_find_compatible_node(NULL, NULL, "cdns,xtensa-cpu");
+	if (cpu) {
+		clk = of_clk_get(cpu, 0);
+		of_node_put(cpu);
+		if (!IS_ERR(clk)) {
+			ccount_freq = clk_get_rate(clk);
+			return;
+		} else {
+			pr_warn("%s: CPU input clock not found\n",
+				__func__);
+		}
+	} else {
+		pr_warn("%s: CPU node not found in the device tree\n",
+			__func__);
+	}
+
+	platform_calibrate_ccount();
+}
+#else
+static inline void calibrate_ccount(void)
+{
+	platform_calibrate_ccount();
+}
+#endif
+#endif
+
+void __init time_init(void)
+{
+	int irq;
+
+	of_clk_init(NULL);
+#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
+	pr_info("Calibrating CPU frequency ");
+	calibrate_ccount();
+	pr_cont("%d.%02d MHz\n",
+		(int)ccount_freq / 1000000,
+		(int)(ccount_freq / 10000) % 100);
+#else
+	ccount_freq = CONFIG_XTENSA_CPU_CLOCK*1000000UL;
+#endif
+	WARN(!ccount_freq,
+	     "%s: CPU clock frequency is not set up correctly\n",
+	     __func__);
+	clocksource_register_hz(&ccount_clocksource, ccount_freq);
+	local_timer_setup(0);
+	irq = this_cpu_ptr(&ccount_timer)->evt.irq;
+	if (request_irq(irq, timer_interrupt, IRQF_TIMER, "timer", NULL))
+		pr_err("Failed to request irq %d (timer)\n", irq);
+	sched_clock_register(ccount_sched_clock_read, 32, ccount_freq);
+	timer_probe();
+}
+
+#ifndef CONFIG_GENERIC_CALIBRATE_DELAY
+void calibrate_delay(void)
+{
+	loops_per_jiffy = ccount_freq / HZ;
+	pr_info("Calibrating delay loop (skipped)... %lu.%02lu BogoMIPS preset\n",
+		loops_per_jiffy / (1000000 / HZ),
+		(loops_per_jiffy / (10000 / HZ)) % 100);
+}
+#endif
diff --git a/arch/xtensa/kernel/traps.c b/arch/xtensa/kernel/traps.c
new file mode 100644
index 000000000..9e9ade20a
--- /dev/null
+++ b/arch/xtensa/kernel/traps.c
@@ -0,0 +1,595 @@
+/*
+ * arch/xtensa/kernel/traps.c
+ *
+ * Exception handling.
+ *
+ * Derived from code with the following copyrights:
+ * Copyright (C) 1994 - 1999 by Ralf Baechle
+ * Modified for R3000 by Paul M. Antoine, 1995, 1996
+ * Complete output from die() by Ulf Carlsson, 1998
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ *
+ * Essentially rewritten for the Xtensa architecture port.
+ *
+ * Copyright (C) 2001 - 2013 Tensilica Inc.
+ *
+ * Joe Taylor	<joe@tensilica.com, joetylr@yahoo.com>
+ * Chris Zankel	<chris@zankel.net>
+ * Marc Gauthier<marc@tensilica.com, marc@alumni.uwaterloo.ca>
+ * Kevin Chea
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched/signal.h>
+#include <linux/sched/debug.h>
+#include <linux/sched/task_stack.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/stringify.h>
+#include <linux/kallsyms.h>
+#include <linux/delay.h>
+#include <linux/hardirq.h>
+#include <linux/ratelimit.h>
+#include <linux/pgtable.h>
+
+#include <asm/stacktrace.h>
+#include <asm/ptrace.h>
+#include <asm/timex.h>
+#include <linux/uaccess.h>
+#include <asm/processor.h>
+#include <asm/traps.h>
+#include <asm/hw_breakpoint.h>
+
+/*
+ * Machine specific interrupt handlers
+ */
+
+static void do_illegal_instruction(struct pt_regs *regs);
+static void do_div0(struct pt_regs *regs);
+static void do_interrupt(struct pt_regs *regs);
+#if XTENSA_FAKE_NMI
+static void do_nmi(struct pt_regs *regs);
+#endif
+#if XCHAL_UNALIGNED_LOAD_EXCEPTION || XCHAL_UNALIGNED_STORE_EXCEPTION
+static void do_unaligned_user(struct pt_regs *regs);
+#endif
+static void do_multihit(struct pt_regs *regs);
+#if XTENSA_HAVE_COPROCESSORS
+static void do_coprocessor(struct pt_regs *regs);
+#endif
+static void do_debug(struct pt_regs *regs);
+
+/*
+ * The vector table must be preceded by a save area (which
+ * implies it must be in RAM, unless one places RAM immediately
+ * before a ROM and puts the vector at the start of the ROM (!))
+ */
+
+#define KRNL		0x01
+#define USER		0x02
+
+#define COPROCESSOR(x)							\
+{ EXCCAUSE_COPROCESSOR ## x ## _DISABLED, USER|KRNL, fast_coprocessor },\
+{ EXCCAUSE_COPROCESSOR ## x ## _DISABLED, 0, do_coprocessor }
+
+typedef struct {
+	int cause;
+	int fast;
+	void* handler;
+} dispatch_init_table_t;
+
+static dispatch_init_table_t __initdata dispatch_init_table[] = {
+
+#ifdef CONFIG_USER_ABI_CALL0_PROBE
+{ EXCCAUSE_ILLEGAL_INSTRUCTION,	USER,	   fast_illegal_instruction_user },
+#endif
+{ EXCCAUSE_ILLEGAL_INSTRUCTION,	0,	   do_illegal_instruction},
+{ EXCCAUSE_SYSTEM_CALL,		USER,	   fast_syscall_user },
+{ EXCCAUSE_SYSTEM_CALL,		0,	   system_call },
+/* EXCCAUSE_INSTRUCTION_FETCH unhandled */
+/* EXCCAUSE_LOAD_STORE_ERROR unhandled*/
+{ EXCCAUSE_LEVEL1_INTERRUPT,	0,	   do_interrupt },
+#ifdef SUPPORT_WINDOWED
+{ EXCCAUSE_ALLOCA,		USER|KRNL, fast_alloca },
+#endif
+{ EXCCAUSE_INTEGER_DIVIDE_BY_ZERO, 0,	   do_div0 },
+/* EXCCAUSE_PRIVILEGED unhandled */
+#if XCHAL_UNALIGNED_LOAD_EXCEPTION || XCHAL_UNALIGNED_STORE_EXCEPTION
+#ifdef CONFIG_XTENSA_UNALIGNED_USER
+{ EXCCAUSE_UNALIGNED,		USER,	   fast_unaligned },
+#endif
+{ EXCCAUSE_UNALIGNED,		0,	   do_unaligned_user },
+{ EXCCAUSE_UNALIGNED,		KRNL,	   fast_unaligned },
+#endif
+#ifdef CONFIG_MMU
+{ EXCCAUSE_ITLB_MISS,			0,	   do_page_fault },
+{ EXCCAUSE_ITLB_MISS,			USER|KRNL, fast_second_level_miss},
+{ EXCCAUSE_DTLB_MISS,			USER|KRNL, fast_second_level_miss},
+{ EXCCAUSE_DTLB_MISS,			0,	   do_page_fault },
+{ EXCCAUSE_STORE_CACHE_ATTRIBUTE,	USER|KRNL, fast_store_prohibited },
+#endif /* CONFIG_MMU */
+#ifdef CONFIG_PFAULT
+{ EXCCAUSE_ITLB_MULTIHIT,		0,	   do_multihit },
+{ EXCCAUSE_ITLB_PRIVILEGE,		0,	   do_page_fault },
+{ EXCCAUSE_FETCH_CACHE_ATTRIBUTE,	0,	   do_page_fault },
+{ EXCCAUSE_DTLB_MULTIHIT,		0,	   do_multihit },
+{ EXCCAUSE_DTLB_PRIVILEGE,		0,	   do_page_fault },
+{ EXCCAUSE_STORE_CACHE_ATTRIBUTE,	0,	   do_page_fault },
+{ EXCCAUSE_LOAD_CACHE_ATTRIBUTE,	0,	   do_page_fault },
+#endif
+/* XCCHAL_EXCCAUSE_FLOATING_POINT unhandled */
+#if XTENSA_HAVE_COPROCESSOR(0)
+COPROCESSOR(0),
+#endif
+#if XTENSA_HAVE_COPROCESSOR(1)
+COPROCESSOR(1),
+#endif
+#if XTENSA_HAVE_COPROCESSOR(2)
+COPROCESSOR(2),
+#endif
+#if XTENSA_HAVE_COPROCESSOR(3)
+COPROCESSOR(3),
+#endif
+#if XTENSA_HAVE_COPROCESSOR(4)
+COPROCESSOR(4),
+#endif
+#if XTENSA_HAVE_COPROCESSOR(5)
+COPROCESSOR(5),
+#endif
+#if XTENSA_HAVE_COPROCESSOR(6)
+COPROCESSOR(6),
+#endif
+#if XTENSA_HAVE_COPROCESSOR(7)
+COPROCESSOR(7),
+#endif
+#if XTENSA_FAKE_NMI
+{ EXCCAUSE_MAPPED_NMI,			0,		do_nmi },
+#endif
+{ EXCCAUSE_MAPPED_DEBUG,		0,		do_debug },
+{ -1, -1, 0 }
+
+};
+
+/* The exception table <exc_table> serves two functions:
+ * 1. it contains three dispatch tables (fast_user, fast_kernel, default-c)
+ * 2. it is a temporary memory buffer for the exception handlers.
+ */
+
+DEFINE_PER_CPU(struct exc_table, exc_table);
+DEFINE_PER_CPU(struct debug_table, debug_table);
+
+void die(const char*, struct pt_regs*, long);
+
+static inline void
+__die_if_kernel(const char *str, struct pt_regs *regs, long err)
+{
+	if (!user_mode(regs))
+		die(str, regs, err);
+}
+
+/*
+ * Unhandled Exceptions. Kill user task or panic if in kernel space.
+ */
+
+void do_unhandled(struct pt_regs *regs)
+{
+	__die_if_kernel("Caught unhandled exception - should not happen",
+			regs, SIGKILL);
+
+	/* If in user mode, send SIGILL signal to current process */
+	pr_info_ratelimited("Caught unhandled exception in '%s' "
+			    "(pid = %d, pc = %#010lx) - should not happen\n"
+			    "\tEXCCAUSE is %ld\n",
+			    current->comm, task_pid_nr(current), regs->pc,
+			    regs->exccause);
+	force_sig(SIGILL);
+}
+
+/*
+ * Multi-hit exception. This if fatal!
+ */
+
+static void do_multihit(struct pt_regs *regs)
+{
+	die("Caught multihit exception", regs, SIGKILL);
+}
+
+/*
+ * IRQ handler.
+ */
+
+#if XTENSA_FAKE_NMI
+
+#define IS_POW2(v) (((v) & ((v) - 1)) == 0)
+
+#if !(PROFILING_INTLEVEL == XCHAL_EXCM_LEVEL && \
+      IS_POW2(XTENSA_INTLEVEL_MASK(PROFILING_INTLEVEL)))
+#warning "Fake NMI is requested for PMM, but there are other IRQs at or above its level."
+#warning "Fake NMI will be used, but there will be a bugcheck if one of those IRQs fire."
+
+static inline void check_valid_nmi(void)
+{
+	unsigned intread = xtensa_get_sr(interrupt);
+	unsigned intenable = xtensa_get_sr(intenable);
+
+	BUG_ON(intread & intenable &
+	       ~(XTENSA_INTLEVEL_ANDBELOW_MASK(PROFILING_INTLEVEL) ^
+		 XTENSA_INTLEVEL_MASK(PROFILING_INTLEVEL) ^
+		 BIT(XCHAL_PROFILING_INTERRUPT)));
+}
+
+#else
+
+static inline void check_valid_nmi(void)
+{
+}
+
+#endif
+
+irqreturn_t xtensa_pmu_irq_handler(int irq, void *dev_id);
+
+DEFINE_PER_CPU(unsigned long, nmi_count);
+
+static void do_nmi(struct pt_regs *regs)
+{
+	struct pt_regs *old_regs = set_irq_regs(regs);
+
+	nmi_enter();
+	++*this_cpu_ptr(&nmi_count);
+	check_valid_nmi();
+	xtensa_pmu_irq_handler(0, NULL);
+	nmi_exit();
+	set_irq_regs(old_regs);
+}
+#endif
+
+static void do_interrupt(struct pt_regs *regs)
+{
+	static const unsigned int_level_mask[] = {
+		0,
+		XCHAL_INTLEVEL1_MASK,
+		XCHAL_INTLEVEL2_MASK,
+		XCHAL_INTLEVEL3_MASK,
+		XCHAL_INTLEVEL4_MASK,
+		XCHAL_INTLEVEL5_MASK,
+		XCHAL_INTLEVEL6_MASK,
+		XCHAL_INTLEVEL7_MASK,
+	};
+	struct pt_regs *old_regs = set_irq_regs(regs);
+	unsigned unhandled = ~0u;
+
+	irq_enter();
+
+	for (;;) {
+		unsigned intread = xtensa_get_sr(interrupt);
+		unsigned intenable = xtensa_get_sr(intenable);
+		unsigned int_at_level = intread & intenable;
+		unsigned level;
+
+		for (level = LOCKLEVEL; level > 0; --level) {
+			if (int_at_level & int_level_mask[level]) {
+				int_at_level &= int_level_mask[level];
+				if (int_at_level & unhandled)
+					int_at_level &= unhandled;
+				else
+					unhandled |= int_level_mask[level];
+				break;
+			}
+		}
+
+		if (level == 0)
+			break;
+
+		/* clear lowest pending irq in the unhandled mask */
+		unhandled ^= (int_at_level & -int_at_level);
+		do_IRQ(__ffs(int_at_level), regs);
+	}
+
+	irq_exit();
+	set_irq_regs(old_regs);
+}
+
+static bool check_div0(struct pt_regs *regs)
+{
+	static const u8 pattern[] = {'D', 'I', 'V', '0'};
+	const u8 *p;
+	u8 buf[5];
+
+	if (user_mode(regs)) {
+		if (copy_from_user(buf, (void __user *)regs->pc + 2, 5))
+			return false;
+		p = buf;
+	} else {
+		p = (const u8 *)regs->pc + 2;
+	}
+
+	return memcmp(p, pattern, sizeof(pattern)) == 0 ||
+		memcmp(p + 1, pattern, sizeof(pattern)) == 0;
+}
+
+/*
+ * Illegal instruction. Fatal if in kernel space.
+ */
+
+static void do_illegal_instruction(struct pt_regs *regs)
+{
+#ifdef CONFIG_USER_ABI_CALL0_PROBE
+	/*
+	 * When call0 application encounters an illegal instruction fast
+	 * exception handler will attempt to set PS.WOE and retry failing
+	 * instruction.
+	 * If we get here we know that that instruction is also illegal
+	 * with PS.WOE set, so it's not related to the windowed option
+	 * hence PS.WOE may be cleared.
+	 */
+	if (regs->pc == current_thread_info()->ps_woe_fix_addr)
+		regs->ps &= ~PS_WOE_MASK;
+#endif
+	if (check_div0(regs)) {
+		do_div0(regs);
+		return;
+	}
+
+	__die_if_kernel("Illegal instruction in kernel", regs, SIGKILL);
+
+	/* If in user mode, send SIGILL signal to current process. */
+
+	pr_info_ratelimited("Illegal Instruction in '%s' (pid = %d, pc = %#010lx)\n",
+			    current->comm, task_pid_nr(current), regs->pc);
+	force_sig(SIGILL);
+}
+
+static void do_div0(struct pt_regs *regs)
+{
+	__die_if_kernel("Unhandled division by 0 in kernel", regs, SIGKILL);
+	force_sig_fault(SIGFPE, FPE_INTDIV, (void __user *)regs->pc);
+}
+
+/*
+ * Handle unaligned memory accesses from user space. Kill task.
+ *
+ * If CONFIG_UNALIGNED_USER is not set, we don't allow unaligned memory
+ * accesses causes from user space.
+ */
+
+#if XCHAL_UNALIGNED_LOAD_EXCEPTION || XCHAL_UNALIGNED_STORE_EXCEPTION
+static void do_unaligned_user(struct pt_regs *regs)
+{
+	__die_if_kernel("Unhandled unaligned exception in kernel",
+			regs, SIGKILL);
+
+	current->thread.bad_vaddr = regs->excvaddr;
+	current->thread.error_code = -3;
+	pr_info_ratelimited("Unaligned memory access to %08lx in '%s' "
+			    "(pid = %d, pc = %#010lx)\n",
+			    regs->excvaddr, current->comm,
+			    task_pid_nr(current), regs->pc);
+	force_sig_fault(SIGBUS, BUS_ADRALN, (void *) regs->excvaddr);
+}
+#endif
+
+#if XTENSA_HAVE_COPROCESSORS
+static void do_coprocessor(struct pt_regs *regs)
+{
+	coprocessor_flush_release_all(current_thread_info());
+}
+#endif
+
+/* Handle debug events.
+ * When CONFIG_HAVE_HW_BREAKPOINT is on this handler is called with
+ * preemption disabled to avoid rescheduling and keep mapping of hardware
+ * breakpoint structures to debug registers intact, so that
+ * DEBUGCAUSE.DBNUM could be used in case of data breakpoint hit.
+ */
+static void do_debug(struct pt_regs *regs)
+{
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+	int ret = check_hw_breakpoint(regs);
+
+	preempt_enable();
+	if (ret == 0)
+		return;
+#endif
+	__die_if_kernel("Breakpoint in kernel", regs, SIGKILL);
+
+	/* If in user mode, send SIGTRAP signal to current process */
+
+	force_sig(SIGTRAP);
+}
+
+
+#define set_handler(type, cause, handler)				\
+	do {								\
+		unsigned int cpu;					\
+									\
+		for_each_possible_cpu(cpu)				\
+			per_cpu(exc_table, cpu).type[cause] = (handler);\
+	} while (0)
+
+/* Set exception C handler - for temporary use when probing exceptions */
+
+xtensa_exception_handler *
+__init trap_set_handler(int cause, xtensa_exception_handler *handler)
+{
+	void *previous = per_cpu(exc_table, 0).default_handler[cause];
+
+	set_handler(default_handler, cause, handler);
+	return previous;
+}
+
+
+static void trap_init_excsave(void)
+{
+	xtensa_set_sr(this_cpu_ptr(&exc_table), excsave1);
+}
+
+static void trap_init_debug(void)
+{
+	unsigned long debugsave = (unsigned long)this_cpu_ptr(&debug_table);
+
+	this_cpu_ptr(&debug_table)->debug_exception = debug_exception;
+	__asm__ __volatile__("wsr %0, excsave" __stringify(XCHAL_DEBUGLEVEL)
+			     :: "a"(debugsave));
+}
+
+/*
+ * Initialize dispatch tables.
+ *
+ * The exception vectors are stored compressed the __init section in the
+ * dispatch_init_table. This function initializes the following three tables
+ * from that compressed table:
+ * - fast user		first dispatch table for user exceptions
+ * - fast kernel	first dispatch table for kernel exceptions
+ * - default C-handler	C-handler called by the default fast handler.
+ *
+ * See vectors.S for more details.
+ */
+
+void __init trap_init(void)
+{
+	int i;
+
+	/* Setup default vectors. */
+
+	for (i = 0; i < EXCCAUSE_N; i++) {
+		set_handler(fast_user_handler, i, user_exception);
+		set_handler(fast_kernel_handler, i, kernel_exception);
+		set_handler(default_handler, i, do_unhandled);
+	}
+
+	/* Setup specific handlers. */
+
+	for(i = 0; dispatch_init_table[i].cause >= 0; i++) {
+		int fast = dispatch_init_table[i].fast;
+		int cause = dispatch_init_table[i].cause;
+		void *handler = dispatch_init_table[i].handler;
+
+		if (fast == 0)
+			set_handler(default_handler, cause, handler);
+		if ((fast & USER) != 0)
+			set_handler(fast_user_handler, cause, handler);
+		if ((fast & KRNL) != 0)
+			set_handler(fast_kernel_handler, cause, handler);
+	}
+
+	/* Initialize EXCSAVE_1 to hold the address of the exception table. */
+	trap_init_excsave();
+	trap_init_debug();
+}
+
+#ifdef CONFIG_SMP
+void secondary_trap_init(void)
+{
+	trap_init_excsave();
+	trap_init_debug();
+}
+#endif
+
+/*
+ * This function dumps the current valid window frame and other base registers.
+ */
+
+void show_regs(struct pt_regs * regs)
+{
+	int i;
+
+	show_regs_print_info(KERN_DEFAULT);
+
+	for (i = 0; i < 16; i++) {
+		if ((i % 8) == 0)
+			pr_info("a%02d:", i);
+		pr_cont(" %08lx", regs->areg[i]);
+	}
+	pr_cont("\n");
+	pr_info("pc: %08lx, ps: %08lx, depc: %08lx, excvaddr: %08lx\n",
+		regs->pc, regs->ps, regs->depc, regs->excvaddr);
+	pr_info("lbeg: %08lx, lend: %08lx lcount: %08lx, sar: %08lx\n",
+		regs->lbeg, regs->lend, regs->lcount, regs->sar);
+	if (user_mode(regs))
+		pr_cont("wb: %08lx, ws: %08lx, wmask: %08lx, syscall: %ld\n",
+			regs->windowbase, regs->windowstart, regs->wmask,
+			regs->syscall);
+}
+
+static int show_trace_cb(struct stackframe *frame, void *data)
+{
+	const char *loglvl = data;
+
+	if (kernel_text_address(frame->pc))
+		printk("%s [<%08lx>] %pB\n",
+			loglvl, frame->pc, (void *)frame->pc);
+	return 0;
+}
+
+static void show_trace(struct task_struct *task, unsigned long *sp,
+		       const char *loglvl)
+{
+	if (!sp)
+		sp = stack_pointer(task);
+
+	printk("%sCall Trace:\n", loglvl);
+	walk_stackframe(sp, show_trace_cb, (void *)loglvl);
+}
+
+#define STACK_DUMP_ENTRY_SIZE 4
+#define STACK_DUMP_LINE_SIZE 32
+static size_t kstack_depth_to_print = CONFIG_PRINT_STACK_DEPTH;
+
+void show_stack(struct task_struct *task, unsigned long *sp, const char *loglvl)
+{
+	size_t len, off = 0;
+
+	if (!sp)
+		sp = stack_pointer(task);
+
+	len = min((-(size_t)sp) & (THREAD_SIZE - STACK_DUMP_ENTRY_SIZE),
+		  kstack_depth_to_print * STACK_DUMP_ENTRY_SIZE);
+
+	printk("%sStack:\n", loglvl);
+	while (off < len) {
+		u8 line[STACK_DUMP_LINE_SIZE];
+		size_t line_len = len - off > STACK_DUMP_LINE_SIZE ?
+			STACK_DUMP_LINE_SIZE : len - off;
+
+		__memcpy(line, (u8 *)sp + off, line_len);
+		print_hex_dump(loglvl, " ", DUMP_PREFIX_NONE,
+			       STACK_DUMP_LINE_SIZE, STACK_DUMP_ENTRY_SIZE,
+			       line, line_len, false);
+		off += STACK_DUMP_LINE_SIZE;
+	}
+	show_trace(task, sp, loglvl);
+}
+
+DEFINE_SPINLOCK(die_lock);
+
+void __noreturn die(const char * str, struct pt_regs * regs, long err)
+{
+	static int die_counter;
+	const char *pr = "";
+
+	if (IS_ENABLED(CONFIG_PREEMPTION))
+		pr = IS_ENABLED(CONFIG_PREEMPT_RT) ? " PREEMPT_RT" : " PREEMPT";
+
+	console_verbose();
+	spin_lock_irq(&die_lock);
+
+	pr_info("%s: sig: %ld [#%d]%s\n", str, err, ++die_counter, pr);
+	show_regs(regs);
+	if (!user_mode(regs))
+		show_stack(NULL, (unsigned long *)regs->areg[1], KERN_INFO);
+
+	add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
+	spin_unlock_irq(&die_lock);
+
+	if (in_interrupt())
+		panic("Fatal exception in interrupt");
+
+	if (panic_on_oops)
+		panic("Fatal exception");
+
+	make_task_dead(err);
+}
diff --git a/arch/xtensa/kernel/vectors.S b/arch/xtensa/kernel/vectors.S
new file mode 100644
index 000000000..1073fe4a5
--- /dev/null
+++ b/arch/xtensa/kernel/vectors.S
@@ -0,0 +1,805 @@
+/*
+ * arch/xtensa/kernel/vectors.S
+ *
+ * This file contains all exception vectors (user, kernel, and double),
+ * as well as the window vectors (overflow and underflow), and the debug
+ * vector. These are the primary vectors executed by the processor if an
+ * exception occurs.
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ *
+ * Copyright (C) 2005 - 2008 Tensilica, Inc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ *
+ */
+
+/*
+ * We use a two-level table approach. The user and kernel exception vectors
+ * use a first-level dispatch table to dispatch the exception to a registered
+ * fast handler or the default handler, if no fast handler was registered.
+ * The default handler sets up a C-stack and dispatches the exception to a
+ * registerd C handler in the second-level dispatch table.
+ *
+ * Fast handler entry condition:
+ *
+ *   a0:	trashed, original value saved on stack (PT_AREG0)
+ *   a1:	a1
+ *   a2:	new stack pointer, original value in depc
+ *   a3:	dispatch table
+ *   depc:	a2, original value saved on stack (PT_DEPC)
+ *   excsave_1:	a3
+ *
+ * The value for PT_DEPC saved to stack also functions as a boolean to
+ * indicate that the exception is either a double or a regular exception:
+ *
+ *   PT_DEPC	>= VALID_DOUBLE_EXCEPTION_ADDRESS: double exception
+ *		<  VALID_DOUBLE_EXCEPTION_ADDRESS: regular exception
+ *
+ * Note:  Neither the kernel nor the user exception handler generate literals.
+ *
+ */
+
+#include <linux/linkage.h>
+#include <linux/pgtable.h>
+#include <asm/asmmacro.h>
+#include <asm/ptrace.h>
+#include <asm/current.h>
+#include <asm/asm-offsets.h>
+#include <asm/processor.h>
+#include <asm/page.h>
+#include <asm/thread_info.h>
+#include <asm/vectors.h>
+
+#define WINDOW_VECTORS_SIZE   0x180
+
+
+/*
+ * User exception vector. (Exceptions with PS.UM == 1, PS.EXCM == 0)
+ *
+ * We get here when an exception occurred while we were in userland.
+ * We switch to the kernel stack and jump to the first level handler
+ * associated to the exception cause.
+ *
+ * Note: the saved kernel stack pointer (EXC_TABLE_KSTK) is already
+ *       decremented by PT_USER_SIZE.
+ */
+
+	.section .UserExceptionVector.text, "ax"
+
+ENTRY(_UserExceptionVector)
+
+	xsr	a3, excsave1		# save a3 and get dispatch table
+	wsr	a2, depc		# save a2
+	l32i	a2, a3, EXC_TABLE_KSTK	# load kernel stack to a2
+	s32i	a0, a2, PT_AREG0	# save a0 to ESF
+	rsr	a0, exccause		# retrieve exception cause
+	s32i	a0, a2, PT_DEPC		# mark it as a regular exception
+	addx4	a0, a0, a3		# find entry in table
+	l32i	a0, a0, EXC_TABLE_FAST_USER	# load handler
+	xsr	a3, excsave1		# restore a3 and dispatch table
+	jx	a0
+
+ENDPROC(_UserExceptionVector)
+
+/*
+ * Kernel exception vector. (Exceptions with PS.UM == 0, PS.EXCM == 0)
+ *
+ * We get this exception when we were already in kernel space.
+ * We decrement the current stack pointer (kernel) by PT_KERNEL_SIZE and
+ * jump to the first-level handler associated with the exception cause.
+ *
+ * Note: we need to preserve space for the spill region.
+ */
+
+	.section .KernelExceptionVector.text, "ax"
+
+ENTRY(_KernelExceptionVector)
+
+	xsr	a3, excsave1		# save a3, and get dispatch table
+	wsr	a2, depc		# save a2
+	addi	a2, a1, -16 - PT_KERNEL_SIZE	# adjust stack pointer
+	s32i	a0, a2, PT_AREG0	# save a0 to ESF
+	rsr	a0, exccause		# retrieve exception cause
+	s32i	a0, a2, PT_DEPC		# mark it as a regular exception
+	addx4	a0, a0, a3		# find entry in table
+	l32i	a0, a0, EXC_TABLE_FAST_KERNEL	# load handler address
+	xsr	a3, excsave1		# restore a3 and dispatch table
+	jx	a0
+
+ENDPROC(_KernelExceptionVector)
+
+/*
+ * Double exception vector (Exceptions with PS.EXCM == 1)
+ * We get this exception when another exception occurs while were are
+ * already in an exception, such as window overflow/underflow exception,
+ * or 'expected' exceptions, for example memory exception when we were trying
+ * to read data from an invalid address in user space.
+ *
+ * Note that this vector is never invoked for level-1 interrupts, because such
+ * interrupts are disabled (masked) when PS.EXCM is set.
+ *
+ * We decode the exception and take the appropriate action.  However, the
+ * double exception vector is much more careful, because a lot more error
+ * cases go through the double exception vector than through the user and
+ * kernel exception vectors.
+ *
+ * Occasionally, the kernel expects a double exception to occur.  This usually
+ * happens when accessing user-space memory with the user's permissions
+ * (l32e/s32e instructions).  The kernel state, though, is not always suitable
+ * for immediate transfer of control to handle_double, where "normal" exception
+ * processing occurs. Also in kernel mode, TLB misses can occur if accessing
+ * vmalloc memory, possibly requiring repair in a double exception handler.
+ *
+ * The variable at TABLE_FIXUP offset from the pointer in EXCSAVE_1 doubles as
+ * a boolean variable and a pointer to a fixup routine. If the variable
+ * EXC_TABLE_FIXUP is non-zero, this handler jumps to that address. A value of
+ * zero indicates to use the default kernel/user exception handler.
+ * There is only one exception, when the value is identical to the exc_table
+ * label, the kernel is in trouble. This mechanism is used to protect critical
+ * sections, mainly when the handler writes to the stack to assert the stack
+ * pointer is valid. Once the fixup/default handler leaves that area, the
+ * EXC_TABLE_FIXUP variable is reset to the fixup handler or zero.
+ *
+ * Procedures wishing to use this mechanism should set EXC_TABLE_FIXUP to the
+ * nonzero address of a fixup routine before it could cause a double exception
+ * and reset it before it returns.
+ *
+ * Some other things to take care of when a fast exception handler doesn't
+ * specify a particular fixup handler but wants to use the default handlers:
+ *
+ *  - The original stack pointer (in a1) must not be modified. The fast
+ *    exception handler should only use a2 as the stack pointer.
+ *
+ *  - If the fast handler manipulates the stack pointer (in a2), it has to
+ *    register a valid fixup handler and cannot use the default handlers.
+ *
+ *  - The handler can use any other generic register from a3 to a15, but it
+ *    must save the content of these registers to stack (PT_AREG3...PT_AREGx)
+ *
+ *  - These registers must be saved before a double exception can occur.
+ *
+ *  - If we ever implement handling signals while in double exceptions, the
+ *    number of registers a fast handler has saved (excluding a0 and a1) must
+ *    be written to  PT_AREG1. (1 if only a3 is used, 2 for a3 and a4, etc. )
+ *
+ * The fixup handlers are special handlers:
+ *
+ *  - Fixup entry conditions differ from regular exceptions:
+ *
+ *	a0:	   DEPC
+ *	a1: 	   a1
+ *	a2:	   trashed, original value in EXC_TABLE_DOUBLE_SAVE
+ *	a3:	   exctable
+ *	depc:	   a0
+ *	excsave_1: a3
+ *
+ *  - When the kernel enters the fixup handler, it still assumes it is in a
+ *    critical section, so EXC_TABLE_FIXUP variable is set to exc_table.
+ *    The fixup handler, therefore, has to re-register itself as the fixup
+ *    handler before it returns from the double exception.
+ *
+ *  - Fixup handler can share the same exception frame with the fast handler.
+ *    The kernel stack pointer is not changed when entering the fixup handler.
+ *
+ *  - Fixup handlers can jump to the default kernel and user exception
+ *    handlers. Before it jumps, though, it has to setup a exception frame
+ *    on stack. Because the default handler resets the register fixup handler
+ *    the fixup handler must make sure that the default handler returns to
+ *    it instead of the exception address, so it can re-register itself as
+ *    the fixup handler.
+ *
+ * In case of a critical condition where the kernel cannot recover, we jump
+ * to unrecoverable_exception with the following entry conditions.
+ * All registers a0...a15 are unchanged from the last exception, except:
+ *
+ *	a0:	   last address before we jumped to the unrecoverable_exception.
+ *	excsave_1: a0
+ *
+ *
+ * See the handle_alloca_user and spill_registers routines for example clients.
+ *
+ * FIXME: Note: we currently don't allow signal handling coming from a double
+ *        exception, so the item markt with (*) is not required.
+ */
+
+	.section .DoubleExceptionVector.text, "ax"
+
+ENTRY(_DoubleExceptionVector)
+
+	xsr	a3, excsave1
+	s32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
+
+	/* Check for kernel double exception (usually fatal). */
+
+	rsr	a2, ps
+	_bbsi.l	a2, PS_UM_BIT, 1f
+	j	.Lksp
+
+	.align	4
+	.literal_position
+1:
+	/* Check if we are currently handling a window exception. */
+	/* Note: We don't need to indicate that we enter a critical section. */
+
+	xsr	a0, depc		# get DEPC, save a0
+
+#ifdef SUPPORT_WINDOWED
+	movi	a2, WINDOW_VECTORS_VADDR
+	_bltu	a0, a2, .Lfixup
+	addi	a2, a2, WINDOW_VECTORS_SIZE
+	_bgeu	a0, a2, .Lfixup
+
+	/* Window overflow/underflow exception. Get stack pointer. */
+
+	l32i	a2, a3, EXC_TABLE_KSTK
+
+	/* Check for overflow/underflow exception, jump if overflow. */
+
+	bbci.l	a0, 6, _DoubleExceptionVector_WindowOverflow
+
+	/*
+	 * Restart window underflow exception.
+	 * Currently:
+	 *	depc = orig a0,
+	 *	a0 = orig DEPC,
+	 *	a2 = new sp based on KSTK from exc_table
+	 *	a3 = excsave_1
+	 *	excsave_1 = orig a3
+	 *
+	 * We return to the instruction in user space that caused the window
+	 * underflow exception. Therefore, we change window base to the value
+	 * before we entered the window underflow exception and prepare the
+	 * registers to return as if we were coming from a regular exception
+	 * by changing depc (in a0).
+	 * Note: We can trash the current window frame (a0...a3) and depc!
+	 */
+_DoubleExceptionVector_WindowUnderflow:
+	xsr	a3, excsave1
+	wsr	a2, depc		# save stack pointer temporarily
+	rsr	a0, ps
+	extui	a0, a0, PS_OWB_SHIFT, PS_OWB_WIDTH
+	wsr	a0, windowbase
+	rsync
+
+	/* We are now in the previous window frame. Save registers again. */
+
+	xsr	a2, depc		# save a2 and get stack pointer
+	s32i	a0, a2, PT_AREG0
+	xsr	a3, excsave1
+	rsr	a0, exccause
+	s32i	a0, a2, PT_DEPC		# mark it as a regular exception
+	addx4	a0, a0, a3
+	xsr	a3, excsave1
+	l32i	a0, a0, EXC_TABLE_FAST_USER
+	jx	a0
+
+#else
+	j	.Lfixup
+#endif
+
+	/*
+	 * We only allow the ITLB miss exception if we are in kernel space.
+	 * All other exceptions are unexpected and thus unrecoverable!
+	 */
+
+#ifdef CONFIG_MMU
+	.extern fast_second_level_miss_double_kernel
+
+.Lksp:	/* a0: a0, a1: a1, a2: a2, a3: trashed, depc: depc, excsave: a3 */
+
+	rsr	a3, exccause
+	beqi	a3, EXCCAUSE_ITLB_MISS, 1f
+	addi	a3, a3, -EXCCAUSE_DTLB_MISS
+	bnez	a3, .Lunrecoverable
+1:	movi	a3, fast_second_level_miss_double_kernel
+	jx	a3
+#else
+.equ	.Lksp,	.Lunrecoverable
+#endif
+
+	/* Critical! We can't handle this situation. PANIC! */
+
+	.extern unrecoverable_exception
+
+.Lunrecoverable_fixup:
+	l32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
+	xsr	a0, depc
+
+.Lunrecoverable:
+	rsr	a3, excsave1
+	wsr	a0, excsave1
+	call0	unrecoverable_exception
+
+.Lfixup:/* Check for a fixup handler or if we were in a critical section. */
+
+	/* a0: depc, a1: a1, a2: trash, a3: exctable, depc: a0, excsave1: a3 */
+
+	/* Enter critical section. */
+
+	l32i	a2, a3, EXC_TABLE_FIXUP
+	s32i	a3, a3, EXC_TABLE_FIXUP
+	beq	a2, a3, .Lunrecoverable_fixup	# critical section
+	beqz	a2, .Ldflt			# no handler was registered
+
+	/* a0: depc, a1: a1, a2: trash, a3: exctable, depc: a0, excsave: a3 */
+
+	jx	a2
+
+.Ldflt:	/* Get stack pointer. */
+
+	l32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
+	addi	a2, a2, -PT_USER_SIZE
+
+	/* a0: depc, a1: a1, a2: kstk, a3: exctable, depc: a0, excsave: a3 */
+
+	s32i	a0, a2, PT_DEPC
+	l32i	a0, a3, EXC_TABLE_DOUBLE_SAVE
+	xsr	a0, depc
+	s32i	a0, a2, PT_AREG0
+
+	/* a0: avail, a1: a1, a2: kstk, a3: exctable, depc: a2, excsave: a3 */
+
+	rsr	a0, exccause
+	addx4	a0, a0, a3
+	xsr	a3, excsave1
+	l32i	a0, a0, EXC_TABLE_FAST_USER
+	jx	a0
+
+#ifdef SUPPORT_WINDOWED
+	/*
+	 * Restart window OVERFLOW exception.
+	 * Currently:
+	 *	depc = orig a0,
+	 *	a0 = orig DEPC,
+	 *	a2 = new sp based on KSTK from exc_table
+	 *	a3 = EXCSAVE_1
+	 *	excsave_1 = orig a3
+	 *
+	 * We return to the instruction in user space that caused the window
+	 * overflow exception. Therefore, we change window base to the value
+	 * before we entered the window overflow exception and prepare the
+	 * registers to return as if we were coming from a regular exception
+	 * by changing DEPC (in a0).
+	 *
+	 * NOTE: We CANNOT trash the current window frame (a0...a3), but we
+	 * can clobber depc.
+	 *
+	 * The tricky part here is that overflow8 and overflow12 handlers
+	 * save a0, then clobber a0.  To restart the handler, we have to restore
+	 * a0 if the double exception was past the point where a0 was clobbered.
+	 *
+	 * To keep things simple, we take advantage of the fact all overflow
+	 * handlers save a0 in their very first instruction.  If DEPC was past
+	 * that instruction, we can safely restore a0 from where it was saved
+	 * on the stack.
+	 *
+	 * a0: depc, a1: a1, a2: kstk, a3: exc_table, depc: a0, excsave1: a3
+	 */
+_DoubleExceptionVector_WindowOverflow:
+	extui	a2, a0, 0, 6	# get offset into 64-byte vector handler
+	beqz	a2, 1f		# if at start of vector, don't restore
+
+	addi	a0, a0, -128
+	bbsi.l	a0, 8, 1f	# don't restore except for overflow 8 and 12
+
+	/*
+	 * This fixup handler is for the extremely unlikely case where the
+	 * overflow handler's reference thru a0 gets a hardware TLB refill
+	 * that bumps out the (distinct, aliasing) TLB entry that mapped its
+	 * prior references thru a9/a13, and where our reference now thru
+	 * a9/a13 gets a 2nd-level miss exception (not hardware TLB refill).
+	 */
+	movi	a2, window_overflow_restore_a0_fixup
+	s32i	a2, a3, EXC_TABLE_FIXUP
+	l32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
+	xsr	a3, excsave1
+
+	bbsi.l	a0, 7, 2f
+
+	/*
+	 * Restore a0 as saved by _WindowOverflow8().
+	 */
+
+	l32e	a0, a9, -16
+	wsr	a0, depc	# replace the saved a0
+	j	3f
+
+2:
+	/*
+	 * Restore a0 as saved by _WindowOverflow12().
+	 */
+
+	l32e	a0, a13, -16
+	wsr	a0, depc	# replace the saved a0
+3:
+	xsr	a3, excsave1
+	movi	a0, 0
+	s32i	a0, a3, EXC_TABLE_FIXUP
+	s32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
+1:
+	/*
+	 * Restore WindowBase while leaving all address registers restored.
+	 * We have to use ROTW for this, because WSR.WINDOWBASE requires
+	 * an address register (which would prevent restore).
+	 *
+	 * Window Base goes from 0 ... 7 (Module 8)
+	 * Window Start is 8 bits; Ex: (0b1010 1010):0x55 from series of call4s
+	 */
+
+	rsr	a0, ps
+	extui	a0, a0, PS_OWB_SHIFT, PS_OWB_WIDTH
+	rsr	a2, windowbase
+	sub	a0, a2, a0
+	extui	a0, a0, 0, 3
+
+	l32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
+	xsr	a3, excsave1
+	beqi	a0, 1, .L1pane
+	beqi	a0, 3, .L3pane
+
+	rsr	a0, depc
+	rotw	-2
+
+	/*
+	 * We are now in the user code's original window frame.
+	 * Process the exception as a user exception as if it was
+	 * taken by the user code.
+	 *
+	 * This is similar to the user exception vector,
+	 * except that PT_DEPC isn't set to EXCCAUSE.
+	 */
+1:
+	xsr	a3, excsave1
+	wsr	a2, depc
+	l32i	a2, a3, EXC_TABLE_KSTK
+	s32i	a0, a2, PT_AREG0
+	rsr	a0, exccause
+
+	s32i	a0, a2, PT_DEPC
+
+_DoubleExceptionVector_handle_exception:
+	addi	a0, a0, -EXCCAUSE_UNALIGNED
+	beqz	a0, 2f
+	addx4	a0, a0, a3
+	l32i	a0, a0, EXC_TABLE_FAST_USER + 4 * EXCCAUSE_UNALIGNED
+	xsr	a3, excsave1
+	jx	a0
+2:
+	movi	a0, user_exception
+	xsr	a3, excsave1
+	jx	a0
+
+.L1pane:
+	rsr	a0, depc
+	rotw	-1
+	j	1b
+
+.L3pane:
+	rsr	a0, depc
+	rotw	-3
+	j	1b
+#endif
+
+ENDPROC(_DoubleExceptionVector)
+
+#ifdef SUPPORT_WINDOWED
+
+/*
+ * Fixup handler for TLB miss in double exception handler for window owerflow.
+ * We get here with windowbase set to the window that was being spilled and
+ * a0 trashed. a0 bit 7 determines if this is a call8 (bit clear) or call12
+ * (bit set) window.
+ *
+ * We do the following here:
+ * - go to the original window retaining a0 value;
+ * - set up exception stack to return back to appropriate a0 restore code
+ *   (we'll need to rotate window back and there's no place to save this
+ *    information, use different return address for that);
+ * - handle the exception;
+ * - go to the window that was being spilled;
+ * - set up window_overflow_restore_a0_fixup as a fixup routine;
+ * - reload a0;
+ * - restore the original window;
+ * - reset the default fixup routine;
+ * - return to user. By the time we get to this fixup handler all information
+ *   about the conditions of the original double exception that happened in
+ *   the window overflow handler is lost, so we just return to userspace to
+ *   retry overflow from start.
+ *
+ * a0: value of depc, original value in depc
+ * a2: trashed, original value in EXC_TABLE_DOUBLE_SAVE
+ * a3: exctable, original value in excsave1
+ */
+
+	__XTENSA_HANDLER
+	.literal_position
+
+ENTRY(window_overflow_restore_a0_fixup)
+
+	rsr	a0, ps
+	extui	a0, a0, PS_OWB_SHIFT, PS_OWB_WIDTH
+	rsr	a2, windowbase
+	sub	a0, a2, a0
+	extui	a0, a0, 0, 3
+	l32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
+	xsr	a3, excsave1
+
+	_beqi	a0, 1, .Lhandle_1
+	_beqi	a0, 3, .Lhandle_3
+
+	.macro	overflow_fixup_handle_exception_pane n
+
+	rsr	a0, depc
+	rotw	-\n
+
+	xsr	a3, excsave1
+	wsr	a2, depc
+	l32i	a2, a3, EXC_TABLE_KSTK
+	s32i	a0, a2, PT_AREG0
+
+	movi	a0, .Lrestore_\n
+	s32i	a0, a2, PT_DEPC
+	rsr	a0, exccause
+	j	_DoubleExceptionVector_handle_exception
+
+	.endm
+
+	overflow_fixup_handle_exception_pane 2
+.Lhandle_1:
+	overflow_fixup_handle_exception_pane 1
+.Lhandle_3:
+	overflow_fixup_handle_exception_pane 3
+
+	.macro	overflow_fixup_restore_a0_pane n
+
+	rotw	\n
+	/* Need to preserve a0 value here to be able to handle exception
+	 * that may occur on a0 reload from stack. It may occur because
+	 * TLB miss handler may not be atomic and pointer to page table
+	 * may be lost before we get here. There are no free registers,
+	 * so we need to use EXC_TABLE_DOUBLE_SAVE area.
+	 */
+	xsr	a3, excsave1
+	s32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
+	movi	a2, window_overflow_restore_a0_fixup
+	s32i	a2, a3, EXC_TABLE_FIXUP
+	l32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
+	xsr	a3, excsave1
+	bbsi.l	a0, 7, 1f
+	l32e	a0, a9, -16
+	j	2f
+1:
+	l32e	a0, a13, -16
+2:
+	rotw	-\n
+
+	.endm
+
+.Lrestore_2:
+	overflow_fixup_restore_a0_pane 2
+
+.Lset_default_fixup:
+	xsr	a3, excsave1
+	s32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
+	movi	a2, 0
+	s32i	a2, a3, EXC_TABLE_FIXUP
+	l32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
+	xsr	a3, excsave1
+	rfe
+
+.Lrestore_1:
+	overflow_fixup_restore_a0_pane 1
+	j	.Lset_default_fixup
+.Lrestore_3:
+	overflow_fixup_restore_a0_pane 3
+	j	.Lset_default_fixup
+
+ENDPROC(window_overflow_restore_a0_fixup)
+
+#endif
+
+/*
+ * Debug interrupt vector
+ *
+ * There is not much space here, so simply jump to another handler.
+ * EXCSAVE[DEBUGLEVEL] has been set to that handler.
+ */
+
+	.section .DebugInterruptVector.text, "ax"
+
+ENTRY(_DebugInterruptVector)
+
+	xsr	a3, SREG_EXCSAVE + XCHAL_DEBUGLEVEL
+	s32i	a0, a3, DT_DEBUG_SAVE
+	l32i	a0, a3, DT_DEBUG_EXCEPTION
+	jx	a0
+
+ENDPROC(_DebugInterruptVector)
+
+
+
+/*
+ * Medium priority level interrupt vectors
+ *
+ * Each takes less than 16 (0x10) bytes, no literals, by placing
+ * the extra 8 bytes that would otherwise be required in the window
+ * vectors area where there is space.  With relocatable vectors,
+ * all vectors are within ~ 4 kB range of each other, so we can
+ * simply jump (J) to another vector without having to use JX.
+ *
+ * common_exception code gets current IRQ level in PS.INTLEVEL
+ * and preserves it for the IRQ handling time.
+ */
+
+	.macro	irq_entry_level level
+
+	.if	XCHAL_EXCM_LEVEL >= \level
+	.section .Level\level\()InterruptVector.text, "ax"
+ENTRY(_Level\level\()InterruptVector)
+	wsr	a0, excsave2
+	rsr	a0, epc\level
+	wsr	a0, epc1
+	.if	\level <= LOCKLEVEL
+	movi	a0, EXCCAUSE_LEVEL1_INTERRUPT
+	.else
+	movi	a0, EXCCAUSE_MAPPED_NMI
+	.endif
+	wsr	a0, exccause
+	rsr	a0, eps\level
+					# branch to user or kernel vector
+	j	_SimulateUserKernelVectorException
+	.endif
+
+	.endm
+
+	irq_entry_level 2
+	irq_entry_level 3
+	irq_entry_level 4
+	irq_entry_level 5
+	irq_entry_level 6
+
+#if XCHAL_EXCM_LEVEL >= 2
+	/*
+	 *  Continuation of medium priority interrupt dispatch code.
+	 *  On entry here, a0 contains PS, and EPC2 contains saved a0:
+	 */
+	__XTENSA_HANDLER
+	.align 4
+_SimulateUserKernelVectorException:
+	addi	a0, a0, (1 << PS_EXCM_BIT)
+#if !XTENSA_FAKE_NMI
+	wsr	a0, ps
+#endif
+	bbsi.l	a0, PS_UM_BIT, 1f	# branch if user mode
+	xsr	a0, excsave2		# restore a0
+	j	_KernelExceptionVector	# simulate kernel vector exception
+1:	xsr	a0, excsave2		# restore a0
+	j	_UserExceptionVector	# simulate user vector exception
+#endif
+
+
+/* Window overflow and underflow handlers.
+ * The handlers must be 64 bytes apart, first starting with the underflow
+ * handlers underflow-4 to underflow-12, then the overflow handlers
+ * overflow-4 to overflow-12.
+ *
+ * Note: We rerun the underflow handlers if we hit an exception, so
+ *	 we try to access any page that would cause a page fault early.
+ */
+
+#define ENTRY_ALIGN64(name)	\
+	.globl name;		\
+	.align 64;		\
+	name:
+
+	.section		.WindowVectors.text, "ax"
+
+
+#ifdef SUPPORT_WINDOWED
+
+/* 4-Register Window Overflow Vector (Handler) */
+
+ENTRY_ALIGN64(_WindowOverflow4)
+
+	s32e	a0, a5, -16
+	s32e	a1, a5, -12
+	s32e	a2, a5,  -8
+	s32e	a3, a5,  -4
+	rfwo
+
+ENDPROC(_WindowOverflow4)
+
+/* 4-Register Window Underflow Vector (Handler) */
+
+ENTRY_ALIGN64(_WindowUnderflow4)
+
+	l32e	a0, a5, -16
+	l32e	a1, a5, -12
+	l32e	a2, a5,  -8
+	l32e	a3, a5,  -4
+	rfwu
+
+ENDPROC(_WindowUnderflow4)
+
+/* 8-Register Window Overflow Vector (Handler) */
+
+ENTRY_ALIGN64(_WindowOverflow8)
+
+	s32e	a0, a9, -16
+	l32e	a0, a1, -12
+	s32e	a2, a9,  -8
+	s32e	a1, a9, -12
+	s32e	a3, a9,  -4
+	s32e	a4, a0, -32
+	s32e	a5, a0, -28
+	s32e	a6, a0, -24
+	s32e	a7, a0, -20
+	rfwo
+
+ENDPROC(_WindowOverflow8)
+
+/* 8-Register Window Underflow Vector (Handler) */
+
+ENTRY_ALIGN64(_WindowUnderflow8)
+
+	l32e	a1, a9, -12
+	l32e	a0, a9, -16
+	l32e	a7, a1, -12
+	l32e	a2, a9,  -8
+	l32e	a4, a7, -32
+	l32e	a3, a9,  -4
+	l32e	a5, a7, -28
+	l32e	a6, a7, -24
+	l32e	a7, a7, -20
+	rfwu
+
+ENDPROC(_WindowUnderflow8)
+
+/* 12-Register Window Overflow Vector (Handler) */
+
+ENTRY_ALIGN64(_WindowOverflow12)
+
+	s32e	a0,  a13, -16
+	l32e	a0,  a1,  -12
+	s32e	a1,  a13, -12
+	s32e	a2,  a13,  -8
+	s32e	a3,  a13,  -4
+	s32e	a4,  a0,  -48
+	s32e	a5,  a0,  -44
+	s32e	a6,  a0,  -40
+	s32e	a7,  a0,  -36
+	s32e	a8,  a0,  -32
+	s32e	a9,  a0,  -28
+	s32e	a10, a0,  -24
+	s32e	a11, a0,  -20
+	rfwo
+
+ENDPROC(_WindowOverflow12)
+
+/* 12-Register Window Underflow Vector (Handler) */
+
+ENTRY_ALIGN64(_WindowUnderflow12)
+
+	l32e	a1,  a13, -12
+	l32e	a0,  a13, -16
+	l32e	a11, a1,  -12
+	l32e	a2,  a13,  -8
+	l32e	a4,  a11, -48
+	l32e	a8,  a11, -32
+	l32e	a3,  a13,  -4
+	l32e	a5,  a11, -44
+	l32e	a6,  a11, -40
+	l32e	a7,  a11, -36
+	l32e	a9,  a11, -28
+	l32e	a10, a11, -24
+	l32e	a11, a11, -20
+	rfwu
+
+ENDPROC(_WindowUnderflow12)
+
+#endif
+
+	.text
diff --git a/arch/xtensa/kernel/vmlinux.lds.S b/arch/xtensa/kernel/vmlinux.lds.S
new file mode 100644
index 000000000..965a3952c
--- /dev/null
+++ b/arch/xtensa/kernel/vmlinux.lds.S
@@ -0,0 +1,380 @@
+/*
+ * arch/xtensa/kernel/vmlinux.lds.S
+ *
+ * Xtensa linker script
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2008 Tensilica Inc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ * Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca>
+ * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com>
+ */
+
+#define RO_EXCEPTION_TABLE_ALIGN	16
+
+#include <asm-generic/vmlinux.lds.h>
+#include <asm/page.h>
+#include <asm/thread_info.h>
+
+#include <asm/core.h>
+#include <asm/vectors.h>
+
+OUTPUT_ARCH(xtensa)
+ENTRY(_start)
+
+#ifdef __XTENSA_EB__
+jiffies = jiffies_64 + 4;
+#else
+jiffies = jiffies_64;
+#endif
+
+/* Note: In the following macros, it would be nice to specify only the
+   vector name and section kind and construct "sym" and "section" using
+   CPP concatenation, but that does not work reliably.  Concatenating a
+   string with "." produces an invalid token.  CPP will not print a
+   warning because it thinks this is an assembly file, but it leaves
+   them as multiple tokens and there may or may not be whitespace
+   between them.  */
+
+/* Macro for a relocation entry */
+
+#define RELOCATE_ENTRY(sym, section)		\
+	LONG(sym ## _start);			\
+	LONG(sym ## _end);			\
+	LONG(LOADADDR(section))
+
+#if !defined(CONFIG_VECTORS_ADDR) && XCHAL_HAVE_VECBASE
+#define MERGED_VECTORS 1
+#else
+#define MERGED_VECTORS 0
+#endif
+
+/*
+ * Macro to define a section for a vector. When MERGED_VECTORS is 0
+ * code for every vector is located with other init data. At startup
+ * time head.S copies code for every vector to its final position according
+ * to description recorded in the corresponding RELOCATE_ENTRY.
+ */
+
+#define SECTION_VECTOR4(sym, section, addr, prevsec)			    \
+  section addr : AT(((LOADADDR(prevsec) + SIZEOF(prevsec)) + 3) & ~ 3)      \
+  {									    \
+    . = ALIGN(4);							    \
+    sym ## _start = ABSOLUTE(.);		 			    \
+    *(section)								    \
+    sym ## _end = ABSOLUTE(.);						    \
+  }
+
+#define SECTION_VECTOR2(section, addr)					    \
+  . = addr;								    \
+  *(section)
+
+/*
+ *  Mapping of input sections to output sections when linking.
+ */
+
+SECTIONS
+{
+  . = KERNELOFFSET;
+  /* .text section */
+
+  _text = .;
+  _stext = .;
+
+  .text :
+  {
+    /* The HEAD_TEXT section must be the first section! */
+    HEAD_TEXT
+
+#if MERGED_VECTORS
+    . = ALIGN(PAGE_SIZE);
+    _vecbase = .;
+
+#ifdef SUPPORT_WINDOWED
+    SECTION_VECTOR2 (.WindowVectors.text, WINDOW_VECTORS_VADDR)
+#endif
+#if XCHAL_EXCM_LEVEL >= 2
+    SECTION_VECTOR2 (.Level2InterruptVector.text, INTLEVEL2_VECTOR_VADDR)
+#endif
+#if XCHAL_EXCM_LEVEL >= 3
+    SECTION_VECTOR2 (.Level3InterruptVector.text, INTLEVEL3_VECTOR_VADDR)
+#endif
+#if XCHAL_EXCM_LEVEL >= 4
+    SECTION_VECTOR2 (.Level4InterruptVector.text, INTLEVEL4_VECTOR_VADDR)
+#endif
+#if XCHAL_EXCM_LEVEL >= 5
+    SECTION_VECTOR2 (.Level5InterruptVector.text, INTLEVEL5_VECTOR_VADDR)
+#endif
+#if XCHAL_EXCM_LEVEL >= 6
+    SECTION_VECTOR2 (.Level6InterruptVector.text, INTLEVEL6_VECTOR_VADDR)
+#endif
+    SECTION_VECTOR2 (.DebugInterruptVector.text, DEBUG_VECTOR_VADDR)
+    SECTION_VECTOR2 (.KernelExceptionVector.text, KERNEL_VECTOR_VADDR)
+    SECTION_VECTOR2 (.UserExceptionVector.text, USER_VECTOR_VADDR)
+    SECTION_VECTOR2 (.DoubleExceptionVector.text, DOUBLEEXC_VECTOR_VADDR)
+
+    *(.exception.text)
+#endif
+
+    IRQENTRY_TEXT
+    SOFTIRQENTRY_TEXT
+    ENTRY_TEXT
+    TEXT_TEXT
+    SCHED_TEXT
+    CPUIDLE_TEXT
+    LOCK_TEXT
+    *(.fixup)
+  }
+  _etext = .;
+  PROVIDE (etext = .);
+
+  . = ALIGN(16);
+
+  RO_DATA(4096)
+
+  /* Data section */
+
+#ifdef CONFIG_XIP_KERNEL
+  INIT_TEXT_SECTION(PAGE_SIZE)
+#else
+  _sdata = .;
+  RW_DATA(XCHAL_ICACHE_LINESIZE, PAGE_SIZE, THREAD_SIZE)
+  _edata = .;
+
+  /* Initialization code and data: */
+
+  . = ALIGN(PAGE_SIZE);
+  __init_begin = .;
+  INIT_TEXT_SECTION(PAGE_SIZE)
+
+  .init.data :
+  {
+    INIT_DATA
+  }
+#endif
+
+  .init.rodata :
+  {
+    . = ALIGN(0x4);
+    __tagtable_begin = .;
+    *(.taglist)
+    __tagtable_end = .;
+
+    . = ALIGN(16);
+    __boot_reloc_table_start = ABSOLUTE(.);
+
+#if !MERGED_VECTORS
+#ifdef SUPPORT_WINDOWED
+    RELOCATE_ENTRY(_WindowVectors_text,
+		   .WindowVectors.text);
+#endif
+#if XCHAL_EXCM_LEVEL >= 2
+    RELOCATE_ENTRY(_Level2InterruptVector_text,
+		   .Level2InterruptVector.text);
+#endif
+#if XCHAL_EXCM_LEVEL >= 3
+    RELOCATE_ENTRY(_Level3InterruptVector_text,
+		   .Level3InterruptVector.text);
+#endif
+#if XCHAL_EXCM_LEVEL >= 4
+    RELOCATE_ENTRY(_Level4InterruptVector_text,
+		   .Level4InterruptVector.text);
+#endif
+#if XCHAL_EXCM_LEVEL >= 5
+    RELOCATE_ENTRY(_Level5InterruptVector_text,
+		   .Level5InterruptVector.text);
+#endif
+#if XCHAL_EXCM_LEVEL >= 6
+    RELOCATE_ENTRY(_Level6InterruptVector_text,
+		   .Level6InterruptVector.text);
+#endif
+    RELOCATE_ENTRY(_KernelExceptionVector_text,
+		   .KernelExceptionVector.text);
+    RELOCATE_ENTRY(_UserExceptionVector_text,
+		   .UserExceptionVector.text);
+    RELOCATE_ENTRY(_DoubleExceptionVector_text,
+		   .DoubleExceptionVector.text);
+    RELOCATE_ENTRY(_DebugInterruptVector_text,
+		   .DebugInterruptVector.text);
+    RELOCATE_ENTRY(_exception_text,
+		   .exception.text);
+#endif
+#ifdef CONFIG_XIP_KERNEL
+    RELOCATE_ENTRY(_xip_data, .data);
+    RELOCATE_ENTRY(_xip_init_data, .init.data);
+#endif
+#if defined(CONFIG_SECONDARY_RESET_VECTOR)
+    RELOCATE_ENTRY(_SecondaryResetVector_text,
+		   .SecondaryResetVector.text);
+#endif
+
+    __boot_reloc_table_end = ABSOLUTE(.) ;
+
+    INIT_SETUP(XCHAL_ICACHE_LINESIZE)
+    INIT_CALLS
+    CON_INITCALL
+    INIT_RAM_FS
+  }
+
+  PERCPU_SECTION(XCHAL_ICACHE_LINESIZE)
+
+  /* We need this dummy segment here */
+
+  . = ALIGN(4);
+  .dummy : { LONG(0) }
+
+#undef LAST
+#define LAST	.dummy
+
+#if !MERGED_VECTORS
+  /* The vectors are relocated to the real position at startup time */
+
+#ifdef SUPPORT_WINDOWED
+  SECTION_VECTOR4 (_WindowVectors_text,
+		  .WindowVectors.text,
+		  WINDOW_VECTORS_VADDR,
+		  LAST)
+#undef LAST
+#define LAST	.WindowVectors.text
+#endif
+  SECTION_VECTOR4 (_DebugInterruptVector_text,
+		  .DebugInterruptVector.text,
+		  DEBUG_VECTOR_VADDR,
+		  LAST)
+#undef LAST
+#define LAST	.DebugInterruptVector.text
+#if XCHAL_EXCM_LEVEL >= 2
+  SECTION_VECTOR4 (_Level2InterruptVector_text,
+		  .Level2InterruptVector.text,
+		  INTLEVEL2_VECTOR_VADDR,
+		  LAST)
+# undef LAST
+# define LAST	.Level2InterruptVector.text
+#endif
+#if XCHAL_EXCM_LEVEL >= 3
+  SECTION_VECTOR4 (_Level3InterruptVector_text,
+		  .Level3InterruptVector.text,
+		  INTLEVEL3_VECTOR_VADDR,
+		  LAST)
+# undef LAST
+# define LAST	.Level3InterruptVector.text
+#endif
+#if XCHAL_EXCM_LEVEL >= 4
+  SECTION_VECTOR4 (_Level4InterruptVector_text,
+		  .Level4InterruptVector.text,
+		  INTLEVEL4_VECTOR_VADDR,
+		  LAST)
+# undef LAST
+# define LAST	.Level4InterruptVector.text
+#endif
+#if XCHAL_EXCM_LEVEL >= 5
+  SECTION_VECTOR4 (_Level5InterruptVector_text,
+		  .Level5InterruptVector.text,
+		  INTLEVEL5_VECTOR_VADDR,
+		  LAST)
+# undef LAST
+# define LAST	.Level5InterruptVector.text
+#endif
+#if XCHAL_EXCM_LEVEL >= 6
+  SECTION_VECTOR4 (_Level6InterruptVector_text,
+		  .Level6InterruptVector.text,
+		  INTLEVEL6_VECTOR_VADDR,
+		  LAST)
+# undef LAST
+# define LAST	.Level6InterruptVector.text
+#endif
+  SECTION_VECTOR4 (_KernelExceptionVector_text,
+		  .KernelExceptionVector.text,
+		  KERNEL_VECTOR_VADDR,
+		  LAST)
+#undef LAST
+  SECTION_VECTOR4 (_UserExceptionVector_text,
+		  .UserExceptionVector.text,
+		  USER_VECTOR_VADDR,
+		  .KernelExceptionVector.text)
+  SECTION_VECTOR4 (_DoubleExceptionVector_text,
+		  .DoubleExceptionVector.text,
+		  DOUBLEEXC_VECTOR_VADDR,
+		  .UserExceptionVector.text)
+#define LAST .DoubleExceptionVector.text
+
+#endif
+#if defined(CONFIG_SECONDARY_RESET_VECTOR)
+
+  SECTION_VECTOR4 (_SecondaryResetVector_text,
+		  .SecondaryResetVector.text,
+		  RESET_VECTOR1_VADDR,
+		  LAST)
+#undef LAST
+#define LAST .SecondaryResetVector.text
+
+#endif
+#if !MERGED_VECTORS
+  SECTION_VECTOR4 (_exception_text,
+		  .exception.text,
+		  ,
+		  LAST)
+#undef LAST
+#define LAST .exception.text
+
+#endif
+  . = (LOADADDR(LAST) + SIZEOF(LAST) + 3) & ~ 3;
+
+  .dummy1 : AT(ADDR(.dummy1)) { LONG(0) }
+  . = ALIGN(PAGE_SIZE);
+
+#ifndef CONFIG_XIP_KERNEL
+  __init_end = .;
+
+  BSS_SECTION(0, 8192, 0)
+#endif
+
+  _end = .;
+
+#ifdef CONFIG_XIP_KERNEL
+  . = CONFIG_XIP_DATA_ADDR;
+
+  _xip_start = .;
+
+#undef LOAD_OFFSET
+#define LOAD_OFFSET \
+  (CONFIG_XIP_DATA_ADDR - (LOADADDR(.dummy1) + SIZEOF(.dummy1) + 3) & ~ 3)
+
+  _xip_data_start = .;
+  _sdata = .;
+  RW_DATA(XCHAL_ICACHE_LINESIZE, PAGE_SIZE, THREAD_SIZE)
+  _edata = .;
+  _xip_data_end = .;
+
+  /* Initialization data: */
+
+  STRUCT_ALIGN();
+
+  _xip_init_data_start = .;
+  __init_begin = .;
+  .init.data :
+  {
+    INIT_DATA
+  }
+  _xip_init_data_end = .;
+  __init_end = .;
+  BSS_SECTION(0, 8192, 0)
+
+  _xip_end = .;
+
+#undef LOAD_OFFSET
+#endif
+
+  DWARF_DEBUG
+
+  .xt.prop 0 : { KEEP(*(.xt.prop .xt.prop.* .gnu.linkonce.prop.*)) }
+  .xt.insn 0 : { KEEP(*(.xt.insn .xt.insn.* .gnu.linkonce.x*)) }
+  .xt.lit  0 : { KEEP(*(.xt.lit  .xt.lit.*  .gnu.linkonce.p*)) }
+
+  /* Sections to be discarded */
+  DISCARDS
+}
diff --git a/arch/xtensa/kernel/xtensa_ksyms.c b/arch/xtensa/kernel/xtensa_ksyms.c
new file mode 100644
index 000000000..17a7ef86f
--- /dev/null
+++ b/arch/xtensa/kernel/xtensa_ksyms.c
@@ -0,0 +1,123 @@
+/*
+ * arch/xtensa/kernel/xtensa_ksyms.c
+ *
+ * Export Xtensa-specific functions for loadable modules.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005  Tensilica Inc.
+ *
+ * Joe Taylor <joe@tensilica.com>
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <asm/irq.h>
+#include <linux/in6.h>
+
+#include <linux/uaccess.h>
+#include <asm/cacheflush.h>
+#include <asm/checksum.h>
+#include <asm/dma.h>
+#include <asm/io.h>
+#include <asm/page.h>
+#include <asm/ftrace.h>
+#ifdef CONFIG_BLK_DEV_FD
+#include <asm/floppy.h>
+#endif
+#ifdef CONFIG_NET
+#include <net/checksum.h>
+#endif /* CONFIG_NET */
+
+
+/*
+ * String functions
+ */
+EXPORT_SYMBOL(memset);
+EXPORT_SYMBOL(memcpy);
+EXPORT_SYMBOL(memmove);
+EXPORT_SYMBOL(__memset);
+EXPORT_SYMBOL(__memcpy);
+EXPORT_SYMBOL(__memmove);
+#ifdef CONFIG_ARCH_HAS_STRNCPY_FROM_USER
+EXPORT_SYMBOL(__strncpy_user);
+#endif
+EXPORT_SYMBOL(clear_page);
+EXPORT_SYMBOL(copy_page);
+
+EXPORT_SYMBOL(empty_zero_page);
+
+/*
+ * gcc internal math functions
+ */
+extern long long __ashrdi3(long long, int);
+extern long long __ashldi3(long long, int);
+extern long long __bswapdi2(long long);
+extern int __bswapsi2(int);
+extern long long __lshrdi3(long long, int);
+extern int __divsi3(int, int);
+extern int __modsi3(int, int);
+extern int __mulsi3(int, int);
+extern unsigned int __udivsi3(unsigned int, unsigned int);
+extern unsigned int __umodsi3(unsigned int, unsigned int);
+extern unsigned long long __umulsidi3(unsigned int, unsigned int);
+
+EXPORT_SYMBOL(__ashldi3);
+EXPORT_SYMBOL(__ashrdi3);
+EXPORT_SYMBOL(__bswapdi2);
+EXPORT_SYMBOL(__bswapsi2);
+EXPORT_SYMBOL(__lshrdi3);
+EXPORT_SYMBOL(__divsi3);
+EXPORT_SYMBOL(__modsi3);
+EXPORT_SYMBOL(__mulsi3);
+EXPORT_SYMBOL(__udivsi3);
+EXPORT_SYMBOL(__umodsi3);
+EXPORT_SYMBOL(__umulsidi3);
+
+unsigned int __sync_fetch_and_and_4(volatile void *p, unsigned int v)
+{
+	BUG();
+}
+EXPORT_SYMBOL(__sync_fetch_and_and_4);
+
+unsigned int __sync_fetch_and_or_4(volatile void *p, unsigned int v)
+{
+	BUG();
+}
+EXPORT_SYMBOL(__sync_fetch_and_or_4);
+
+/*
+ * Networking support
+ */
+EXPORT_SYMBOL(csum_partial);
+EXPORT_SYMBOL(csum_partial_copy_generic);
+
+/*
+ * Architecture-specific symbols
+ */
+EXPORT_SYMBOL(__xtensa_copy_user);
+EXPORT_SYMBOL(__invalidate_icache_range);
+
+/*
+ * Kernel hacking ...
+ */
+
+#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
+// FIXME EXPORT_SYMBOL(screen_info);
+#endif
+
+extern long common_exception_return;
+EXPORT_SYMBOL(common_exception_return);
+
+#ifdef CONFIG_FUNCTION_TRACER
+EXPORT_SYMBOL(_mcount);
+#endif
+
+EXPORT_SYMBOL(__invalidate_dcache_range);
+#if XCHAL_DCACHE_IS_WRITEBACK
+EXPORT_SYMBOL(__flush_dcache_range);
+#endif
diff --git a/arch/xtensa/lib/Makefile b/arch/xtensa/lib/Makefile
new file mode 100644
index 000000000..c9c261418
--- /dev/null
+++ b/arch/xtensa/lib/Makefile
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for Xtensa-specific library files.
+#
+
+lib-y	+= memcopy.o memset.o checksum.o \
+	   ashldi3.o ashrdi3.o bswapdi2.o bswapsi2.o lshrdi3.o \
+	   divsi3.o udivsi3.o modsi3.o umodsi3.o mulsi3.o umulsidi3.o \
+	   usercopy.o strncpy_user.o strnlen_user.o
+lib-$(CONFIG_PCI) += pci-auto.o
+lib-$(CONFIG_KCSAN) += kcsan-stubs.o
+KCSAN_SANITIZE_kcsan-stubs.o := n
diff --git a/arch/xtensa/lib/ashldi3.S b/arch/xtensa/lib/ashldi3.S
new file mode 100644
index 000000000..67fb0da9e
--- /dev/null
+++ b/arch/xtensa/lib/ashldi3.S
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0 */
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+#ifdef __XTENSA_EB__
+#define uh a2
+#define ul a3
+#else
+#define uh a3
+#define ul a2
+#endif /* __XTENSA_EB__ */
+
+ENTRY(__ashldi3)
+
+	abi_entry_default
+	ssl	a4
+	bgei	a4, 32, .Llow_only
+	src	uh, uh, ul
+	sll	ul, ul
+	abi_ret_default
+
+.Llow_only:
+	sll	uh, ul
+	movi	ul, 0
+	abi_ret_default
+
+ENDPROC(__ashldi3)
diff --git a/arch/xtensa/lib/ashrdi3.S b/arch/xtensa/lib/ashrdi3.S
new file mode 100644
index 000000000..cbf052c51
--- /dev/null
+++ b/arch/xtensa/lib/ashrdi3.S
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0 */
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+#ifdef __XTENSA_EB__
+#define uh a2
+#define ul a3
+#else
+#define uh a3
+#define ul a2
+#endif /* __XTENSA_EB__ */
+
+ENTRY(__ashrdi3)
+
+	abi_entry_default
+	ssr	a4
+	bgei	a4, 32, .Lhigh_only
+	src	ul, uh, ul
+	sra	uh, uh
+	abi_ret_default
+
+.Lhigh_only:
+	sra	ul, uh
+	srai	uh, uh, 31
+	abi_ret_default
+
+ENDPROC(__ashrdi3)
diff --git a/arch/xtensa/lib/bswapdi2.S b/arch/xtensa/lib/bswapdi2.S
new file mode 100644
index 000000000..d8e52e05e
--- /dev/null
+++ b/arch/xtensa/lib/bswapdi2.S
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0 */
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+ENTRY(__bswapdi2)
+
+	abi_entry_default
+	ssai	8
+	srli	a4, a2, 16
+	src	a4, a4, a2
+	src	a4, a4, a4
+	src	a4, a2, a4
+	srli	a2, a3, 16
+	src	a2, a2, a3
+	src	a2, a2, a2
+	src	a2, a3, a2
+	mov	a3, a4
+	abi_ret_default
+
+ENDPROC(__bswapdi2)
diff --git a/arch/xtensa/lib/bswapsi2.S b/arch/xtensa/lib/bswapsi2.S
new file mode 100644
index 000000000..9c1de1344
--- /dev/null
+++ b/arch/xtensa/lib/bswapsi2.S
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0 */
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+ENTRY(__bswapsi2)
+
+	abi_entry_default
+	ssai	8
+	srli	a3, a2, 16
+	src	a3, a3, a2
+	src	a3, a3, a3
+	src	a2, a2, a3
+	abi_ret_default
+
+ENDPROC(__bswapsi2)
diff --git a/arch/xtensa/lib/checksum.S b/arch/xtensa/lib/checksum.S
new file mode 100644
index 000000000..cf1bed1a5
--- /dev/null
+++ b/arch/xtensa/lib/checksum.S
@@ -0,0 +1,357 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the  BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ *		IP/TCP/UDP checksumming routines
+ *
+ * Xtensa version:  Copyright (C) 2001 Tensilica, Inc. by Kevin Chea
+ *                  Optimized by Joe Taylor
+ */
+
+#include <linux/errno.h>
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+/*
+ * computes a partial checksum, e.g. for TCP/UDP fragments
+ */
+
+/*
+ * unsigned int csum_partial(const unsigned char *buf, int len,
+ *                           unsigned int sum);
+ *    a2 = buf
+ *    a3 = len
+ *    a4 = sum
+ *
+ * This function assumes 2- or 4-byte alignment.  Other alignments will fail!
+ */
+
+/* ONES_ADD converts twos-complement math to ones-complement. */
+#define ONES_ADD(sum, val)	  \
+	add	sum, sum, val	; \
+	bgeu	sum, val, 99f	; \
+	addi	sum, sum, 1	; \
+99:				;
+
+.text
+ENTRY(csum_partial)
+
+	/*
+	 * Experiments with Ethernet and SLIP connections show that buf
+	 * is aligned on either a 2-byte or 4-byte boundary.
+	 */
+	abi_entry_default
+	extui	a5, a2, 0, 2
+	bnez	a5, 8f		/* branch if 2-byte aligned */
+	/* Fall-through on common case, 4-byte alignment */
+1:
+	srli	a5, a3, 5	/* 32-byte chunks */
+#if XCHAL_HAVE_LOOPS
+	loopgtz	a5, 2f
+#else
+	beqz	a5, 2f
+	slli	a5, a5, 5
+	add	a5, a5, a2	/* a5 = end of last 32-byte chunk */
+.Loop1:
+#endif
+	l32i	a6, a2, 0
+	l32i	a7, a2, 4
+	ONES_ADD(a4, a6)
+	ONES_ADD(a4, a7)
+	l32i	a6, a2, 8
+	l32i	a7, a2, 12
+	ONES_ADD(a4, a6)
+	ONES_ADD(a4, a7)
+	l32i	a6, a2, 16
+	l32i	a7, a2, 20
+	ONES_ADD(a4, a6)
+	ONES_ADD(a4, a7)
+	l32i	a6, a2, 24
+	l32i	a7, a2, 28
+	ONES_ADD(a4, a6)
+	ONES_ADD(a4, a7)
+	addi	a2, a2, 4*8
+#if !XCHAL_HAVE_LOOPS
+	blt	a2, a5, .Loop1
+#endif
+2:
+	extui	a5, a3, 2, 3	/* remaining 4-byte chunks */
+#if XCHAL_HAVE_LOOPS
+	loopgtz	a5, 3f
+#else
+	beqz	a5, 3f
+	slli	a5, a5, 2
+	add	a5, a5, a2	/* a5 = end of last 4-byte chunk */
+.Loop2:
+#endif
+	l32i	a6, a2, 0
+	ONES_ADD(a4, a6)
+	addi	a2, a2, 4
+#if !XCHAL_HAVE_LOOPS
+	blt	a2, a5, .Loop2
+#endif
+3:
+	_bbci.l	a3, 1, 5f	/* remaining 2-byte chunk */
+	l16ui	a6, a2, 0
+	ONES_ADD(a4, a6)
+	addi	a2, a2, 2
+5:
+	_bbci.l	a3, 0, 7f	/* remaining 1-byte chunk */
+6:	l8ui	a6, a2, 0
+#ifdef __XTENSA_EB__
+	slli	a6, a6, 8	/* load byte into bits 8..15 */
+#endif
+	ONES_ADD(a4, a6)
+7:
+	mov	a2, a4
+	abi_ret_default
+
+	/* uncommon case, buf is 2-byte aligned */
+8:
+	beqz	a3, 7b		/* branch if len == 0 */
+	beqi	a3, 1, 6b	/* branch if len == 1 */
+
+	extui	a5, a2, 0, 1
+	bnez	a5, 8f		/* branch if 1-byte aligned */
+
+	l16ui	a6, a2, 0	/* common case, len >= 2 */
+	ONES_ADD(a4, a6)
+	addi	a2, a2, 2	/* adjust buf */
+	addi	a3, a3, -2	/* adjust len */
+	j	1b		/* now buf is 4-byte aligned */
+
+	/* case: odd-byte aligned, len > 1
+	 * This case is dog slow, so don't give us an odd address.
+	 * (I don't think this ever happens, but just in case.)
+	 */
+8:
+	srli	a5, a3, 2	/* 4-byte chunks */
+#if XCHAL_HAVE_LOOPS
+	loopgtz	a5, 2f
+#else
+	beqz	a5, 2f
+	slli	a5, a5, 2
+	add	a5, a5, a2	/* a5 = end of last 4-byte chunk */
+.Loop3:
+#endif
+	l8ui	a6, a2, 0	/* bits 24..31 */
+	l16ui	a7, a2, 1	/* bits  8..23 */
+	l8ui	a8, a2, 3	/* bits  0.. 8 */
+#ifdef	__XTENSA_EB__
+	slli	a6, a6, 24
+#else
+	slli	a8, a8, 24
+#endif
+	slli	a7, a7, 8
+	or	a7, a7, a6
+	or	a7, a7, a8
+	ONES_ADD(a4, a7)
+	addi	a2, a2, 4
+#if !XCHAL_HAVE_LOOPS
+	blt	a2, a5, .Loop3
+#endif
+2:
+	_bbci.l	a3, 1, 3f	/* remaining 2-byte chunk, still odd addr */
+	l8ui	a6, a2, 0
+	l8ui	a7, a2, 1
+#ifdef	__XTENSA_EB__
+	slli	a6, a6, 8
+#else
+	slli	a7, a7, 8
+#endif
+	or	a7, a7, a6
+	ONES_ADD(a4, a7)
+	addi	a2, a2, 2
+3:
+	j	5b		/* branch to handle the remaining byte */
+
+ENDPROC(csum_partial)
+
+/*
+ * Copy from ds while checksumming, otherwise like csum_partial
+ */
+
+/*
+unsigned int csum_partial_copy_generic (const char *src, char *dst, int len)
+	a2  = src
+	a3  = dst
+	a4  = len
+	a5  = sum
+	a8  = temp
+	a9  = temp
+	a10 = temp
+
+    This function is optimized for 4-byte aligned addresses.  Other
+    alignments work, but not nearly as efficiently.
+ */
+
+ENTRY(csum_partial_copy_generic)
+
+	abi_entry_default
+	movi	a5, -1
+	or	a10, a2, a3
+
+	/* We optimize the following alignment tests for the 4-byte
+	aligned case.  Two bbsi.l instructions might seem more optimal
+	(commented out below).  However, both labels 5: and 3: are out
+	of the imm8 range, so the assembler relaxes them into
+	equivalent bbci.l, j combinations, which is actually
+	slower. */
+
+	extui	a9, a10, 0, 2
+	beqz	a9, 1f		/* branch if both are 4-byte aligned */
+	bbsi.l	a10, 0, 5f	/* branch if one address is odd */
+	j	3f		/* one address is 2-byte aligned */
+
+/*	_bbsi.l	a10, 0, 5f */	/* branch if odd address */
+/*	_bbsi.l	a10, 1, 3f */	/* branch if 2-byte-aligned address */
+
+1:
+	/* src and dst are both 4-byte aligned */
+	srli	a10, a4, 5	/* 32-byte chunks */
+#if XCHAL_HAVE_LOOPS
+	loopgtz	a10, 2f
+#else
+	beqz	a10, 2f
+	slli	a10, a10, 5
+	add	a10, a10, a2	/* a10 = end of last 32-byte src chunk */
+.Loop5:
+#endif
+EX(10f)	l32i	a9, a2, 0
+EX(10f)	l32i	a8, a2, 4
+EX(10f)	s32i	a9, a3, 0
+EX(10f)	s32i	a8, a3, 4
+	ONES_ADD(a5, a9)
+	ONES_ADD(a5, a8)
+EX(10f)	l32i	a9, a2, 8
+EX(10f)	l32i	a8, a2, 12
+EX(10f)	s32i	a9, a3, 8
+EX(10f)	s32i	a8, a3, 12
+	ONES_ADD(a5, a9)
+	ONES_ADD(a5, a8)
+EX(10f)	l32i	a9, a2, 16
+EX(10f)	l32i	a8, a2, 20
+EX(10f)	s32i	a9, a3, 16
+EX(10f)	s32i	a8, a3, 20
+	ONES_ADD(a5, a9)
+	ONES_ADD(a5, a8)
+EX(10f)	l32i	a9, a2, 24
+EX(10f)	l32i	a8, a2, 28
+EX(10f)	s32i	a9, a3, 24
+EX(10f)	s32i	a8, a3, 28
+	ONES_ADD(a5, a9)
+	ONES_ADD(a5, a8)
+	addi	a2, a2, 32
+	addi	a3, a3, 32
+#if !XCHAL_HAVE_LOOPS
+	blt	a2, a10, .Loop5
+#endif
+2:
+	extui	a10, a4, 2, 3	/* remaining 4-byte chunks */
+	extui	a4, a4, 0, 2	/* reset len for general-case, 2-byte chunks */
+#if XCHAL_HAVE_LOOPS
+	loopgtz	a10, 3f
+#else
+	beqz	a10, 3f
+	slli	a10, a10, 2
+	add	a10, a10, a2	/* a10 = end of last 4-byte src chunk */
+.Loop6:
+#endif
+EX(10f)	l32i	a9, a2, 0
+EX(10f)	s32i	a9, a3, 0
+	ONES_ADD(a5, a9)
+	addi	a2, a2, 4
+	addi	a3, a3, 4
+#if !XCHAL_HAVE_LOOPS
+	blt	a2, a10, .Loop6
+#endif
+3:
+	/*
+	Control comes to here in two cases: (1) It may fall through
+	to here from the 4-byte alignment case to process, at most,
+	one 2-byte chunk.  (2) It branches to here from above if
+	either src or dst is 2-byte aligned, and we process all bytes
+	here, except for perhaps a trailing odd byte.  It's
+	inefficient, so align your addresses to 4-byte boundaries.
+
+	a2 = src
+	a3 = dst
+	a4 = len
+	a5 = sum
+	*/
+	srli	a10, a4, 1	/* 2-byte chunks */
+#if XCHAL_HAVE_LOOPS
+	loopgtz	a10, 4f
+#else
+	beqz	a10, 4f
+	slli	a10, a10, 1
+	add	a10, a10, a2	/* a10 = end of last 2-byte src chunk */
+.Loop7:
+#endif
+EX(10f)	l16ui	a9, a2, 0
+EX(10f)	s16i	a9, a3, 0
+	ONES_ADD(a5, a9)
+	addi	a2, a2, 2
+	addi	a3, a3, 2
+#if !XCHAL_HAVE_LOOPS
+	blt	a2, a10, .Loop7
+#endif
+4:
+	/* This section processes a possible trailing odd byte. */
+	_bbci.l	a4, 0, 8f	/* 1-byte chunk */
+EX(10f)	l8ui	a9, a2, 0
+EX(10f)	s8i	a9, a3, 0
+#ifdef __XTENSA_EB__
+	slli	a9, a9, 8	/* shift byte to bits 8..15 */
+#endif
+	ONES_ADD(a5, a9)
+8:
+	mov	a2, a5
+	abi_ret_default
+
+5:
+	/* Control branch to here when either src or dst is odd.  We
+	process all bytes using 8-bit accesses.  Grossly inefficient,
+	so don't feed us an odd address. */
+
+	srli	a10, a4, 1	/* handle in pairs for 16-bit csum */
+#if XCHAL_HAVE_LOOPS
+	loopgtz	a10, 6f
+#else
+	beqz	a10, 6f
+	slli	a10, a10, 1
+	add	a10, a10, a2	/* a10 = end of last odd-aligned, 2-byte src chunk */
+.Loop8:
+#endif
+EX(10f)	l8ui	a9, a2, 0
+EX(10f)	l8ui	a8, a2, 1
+EX(10f)	s8i	a9, a3, 0
+EX(10f)	s8i	a8, a3, 1
+#ifdef __XTENSA_EB__
+	slli	a9, a9, 8	/* combine into a single 16-bit value */
+#else				/* for checksum computation */
+	slli	a8, a8, 8
+#endif
+	or	a9, a9, a8
+	ONES_ADD(a5, a9)
+	addi	a2, a2, 2
+	addi	a3, a3, 2
+#if !XCHAL_HAVE_LOOPS
+	blt	a2, a10, .Loop8
+#endif
+6:
+	j	4b		/* process the possible trailing odd byte */
+
+ENDPROC(csum_partial_copy_generic)
+
+
+# Exception handler:
+.section .fixup, "ax"
+10:
+	movi	a2, 0
+	abi_ret_default
+
+.previous
diff --git a/arch/xtensa/lib/divsi3.S b/arch/xtensa/lib/divsi3.S
new file mode 100644
index 000000000..b044b4744
--- /dev/null
+++ b/arch/xtensa/lib/divsi3.S
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0 */
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+ENTRY(__divsi3)
+
+	abi_entry_default
+#if XCHAL_HAVE_DIV32
+	quos	a2, a2, a3
+#else
+	xor	a7, a2, a3	/* sign = dividend ^ divisor */
+	do_abs	a6, a2, a4	/* udividend = abs (dividend) */
+	do_abs	a3, a3, a4	/* udivisor = abs (divisor) */
+	bltui	a3, 2, .Lle_one	/* check if udivisor <= 1 */
+	do_nsau	a5, a6, a2, a8	/* udividend_shift = nsau (udividend) */
+	do_nsau	a4, a3, a2, a8	/* udivisor_shift = nsau (udivisor) */
+	bgeu	a5, a4, .Lspecial
+
+	sub	a4, a4, a5	/* count = udivisor_shift - udividend_shift */
+	ssl	a4
+	sll	a3, a3		/* udivisor <<= count */
+	movi	a2, 0		/* quotient = 0 */
+
+	/* test-subtract-and-shift loop; one quotient bit on each iteration */
+#if XCHAL_HAVE_LOOPS
+	loopnez	a4, .Lloopend
+#endif /* XCHAL_HAVE_LOOPS */
+.Lloop:
+	bltu	a6, a3, .Lzerobit
+	sub	a6, a6, a3
+	addi	a2, a2, 1
+.Lzerobit:
+	slli	a2, a2, 1
+	srli	a3, a3, 1
+#if !XCHAL_HAVE_LOOPS
+	addi	a4, a4, -1
+	bnez	a4, .Lloop
+#endif /* !XCHAL_HAVE_LOOPS */
+.Lloopend:
+
+	bltu	a6, a3, .Lreturn
+	addi	a2, a2, 1	/* increment if udividend >= udivisor */
+.Lreturn:
+	neg	a5, a2
+	movltz	a2, a5, a7	/* return (sign < 0) ? -quotient : quotient */
+	abi_ret_default
+
+.Lle_one:
+	beqz	a3, .Lerror
+	neg	a2, a6		/* if udivisor == 1, then return... */
+	movgez	a2, a6, a7	/* (sign < 0) ? -udividend : udividend */
+	abi_ret_default
+
+.Lspecial:
+	bltu	a6, a3, .Lreturn0 /* if dividend < divisor, return 0 */
+	movi	a2, 1
+	movi	a4, -1
+	movltz	a2, a4, a7	/* else return (sign < 0) ? -1 : 1 */
+	abi_ret_default
+
+.Lerror:
+	/* Divide by zero: Use an illegal instruction to force an exception.
+	   The subsequent "DIV0" string can be recognized by the exception
+	   handler to identify the real cause of the exception.  */
+	ill
+	.ascii	"DIV0"
+
+.Lreturn0:
+	movi	a2, 0
+#endif /* XCHAL_HAVE_DIV32 */
+	abi_ret_default
+
+ENDPROC(__divsi3)
diff --git a/arch/xtensa/lib/kcsan-stubs.c b/arch/xtensa/lib/kcsan-stubs.c
new file mode 100644
index 000000000..2b08faa62
--- /dev/null
+++ b/arch/xtensa/lib/kcsan-stubs.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bug.h>
+#include <linux/types.h>
+
+void __atomic_store_8(volatile void *p, u64 v, int i)
+{
+	BUG();
+}
+
+u64 __atomic_load_8(const volatile void *p, int i)
+{
+	BUG();
+}
+
+u64 __atomic_exchange_8(volatile void *p, u64 v, int i)
+{
+	BUG();
+}
+
+bool __atomic_compare_exchange_8(volatile void *p1, void *p2, u64 v, bool b, int i1, int i2)
+{
+	BUG();
+}
+
+u64 __atomic_fetch_add_8(volatile void *p, u64 v, int i)
+{
+	BUG();
+}
+
+u64 __atomic_fetch_sub_8(volatile void *p, u64 v, int i)
+{
+	BUG();
+}
+
+u64 __atomic_fetch_and_8(volatile void *p, u64 v, int i)
+{
+	BUG();
+}
+
+u64 __atomic_fetch_or_8(volatile void *p, u64 v, int i)
+{
+	BUG();
+}
+
+u64 __atomic_fetch_xor_8(volatile void *p, u64 v, int i)
+{
+	BUG();
+}
+
+u64 __atomic_fetch_nand_8(volatile void *p, u64 v, int i)
+{
+	BUG();
+}
diff --git a/arch/xtensa/lib/lshrdi3.S b/arch/xtensa/lib/lshrdi3.S
new file mode 100644
index 000000000..129ef8d17
--- /dev/null
+++ b/arch/xtensa/lib/lshrdi3.S
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0 */
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+#ifdef __XTENSA_EB__
+#define uh a2
+#define ul a3
+#else
+#define uh a3
+#define ul a2
+#endif /* __XTENSA_EB__ */
+
+ENTRY(__lshrdi3)
+
+	abi_entry_default
+	ssr	a4
+	bgei	a4, 32, .Lhigh_only
+	src	ul, uh, ul
+	srl	uh, uh
+	abi_ret_default
+
+.Lhigh_only:
+	srl	ul, uh
+	movi	uh, 0
+	abi_ret_default
+
+ENDPROC(__lshrdi3)
diff --git a/arch/xtensa/lib/memcopy.S b/arch/xtensa/lib/memcopy.S
new file mode 100644
index 000000000..b20d206bc
--- /dev/null
+++ b/arch/xtensa/lib/memcopy.S
@@ -0,0 +1,553 @@
+/*
+ * arch/xtensa/lib/hal/memcopy.S -- Core HAL library functions
+ * xthal_memcpy and xthal_bcopy
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2002 - 2012 Tensilica Inc.
+ */
+
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+/*
+ * void *memcpy(void *dst, const void *src, size_t len);
+ *
+ * This function is intended to do the same thing as the standard
+ * library function memcpy() for most cases.
+ * However, where the source and/or destination references
+ * an instruction RAM or ROM or a data RAM or ROM, that
+ * source and/or destination will always be accessed with
+ * 32-bit load and store instructions (as required for these
+ * types of devices).
+ *
+ * !!!!!!!  XTFIXME:
+ * !!!!!!!  Handling of IRAM/IROM has not yet
+ * !!!!!!!  been implemented.
+ *
+ * The (general case) algorithm is as follows:
+ *   If destination is unaligned, align it by conditionally
+ *     copying 1 and 2 bytes.
+ *   If source is aligned,
+ *     do 16 bytes with a loop, and then finish up with
+ *     8, 4, 2, and 1 byte copies conditional on the length;
+ *   else (if source is unaligned),
+ *     do the same, but use SRC to align the source data.
+ *   This code tries to use fall-through branches for the common
+ *     case of aligned source and destination and multiple
+ *     of 4 (or 8) length.
+ *
+ * Register use:
+ *	a0/ return address
+ *	a1/ stack pointer
+ *	a2/ return value
+ *	a3/ src
+ *	a4/ length
+ *	a5/ dst
+ *	a6/ tmp
+ *	a7/ tmp
+ *	a8/ tmp
+ *	a9/ tmp
+ *	a10/ tmp
+ *	a11/ tmp
+ */
+
+	.text
+
+/*
+ * Byte by byte copy
+ */
+	.align	4
+	.byte	0		# 1 mod 4 alignment for LOOPNEZ
+				# (0 mod 4 alignment for LBEG)
+.Lbytecopy:
+#if XCHAL_HAVE_LOOPS
+	loopnez	a4, .Lbytecopydone
+#else /* !XCHAL_HAVE_LOOPS */
+	beqz	a4, .Lbytecopydone
+	add	a7, a3, a4	# a7 = end address for source
+#endif /* !XCHAL_HAVE_LOOPS */
+.Lnextbyte:
+	l8ui	a6, a3, 0
+	addi	a3, a3, 1
+	s8i	a6, a5, 0
+	addi	a5, a5, 1
+#if !XCHAL_HAVE_LOOPS
+	bne	a3, a7, .Lnextbyte # continue loop if $a3:src != $a7:src_end
+#endif /* !XCHAL_HAVE_LOOPS */
+.Lbytecopydone:
+	abi_ret_default
+
+/*
+ * Destination is unaligned
+ */
+
+	.align	4
+.Ldst1mod2:	# dst is only byte aligned
+	_bltui	a4, 7, .Lbytecopy	# do short copies byte by byte
+
+	# copy 1 byte
+	l8ui	a6, a3,  0
+	addi	a3, a3,  1
+	addi	a4, a4, -1
+	s8i	a6, a5,  0
+	addi	a5, a5,  1
+	_bbci.l	a5, 1, .Ldstaligned	# if dst is now aligned, then
+					# return to main algorithm
+.Ldst2mod4:	# dst 16-bit aligned
+	# copy 2 bytes
+	_bltui	a4, 6, .Lbytecopy	# do short copies byte by byte
+	l8ui	a6, a3,  0
+	l8ui	a7, a3,  1
+	addi	a3, a3,  2
+	addi	a4, a4, -2
+	s8i	a6, a5,  0
+	s8i	a7, a5,  1
+	addi	a5, a5,  2
+	j	.Ldstaligned	# dst is now aligned, return to main algorithm
+
+ENTRY(__memcpy)
+WEAK(memcpy)
+
+	abi_entry_default
+	# a2/ dst, a3/ src, a4/ len
+	mov	a5, a2		# copy dst so that a2 is return value
+.Lcommon:
+	_bbsi.l	a2, 0, .Ldst1mod2	# if dst is 1 mod 2
+	_bbsi.l	a2, 1, .Ldst2mod4	# if dst is 2 mod 4
+.Ldstaligned:	# return here from .Ldst?mod? once dst is aligned
+	srli	a7, a4, 4	# number of loop iterations with 16B
+				# per iteration
+	movi	a8, 3		# if source is not aligned,
+	_bany	a3, a8, .Lsrcunaligned	# then use shifting copy
+	/*
+	 * Destination and source are word-aligned, use word copy.
+	 */
+	# copy 16 bytes per iteration for word-aligned dst and word-aligned src
+#if XCHAL_HAVE_LOOPS
+	loopnez	a7, .Loop1done
+#else /* !XCHAL_HAVE_LOOPS */
+	beqz	a7, .Loop1done
+	slli	a8, a7, 4
+	add	a8, a8, a3	# a8 = end of last 16B source chunk
+#endif /* !XCHAL_HAVE_LOOPS */
+.Loop1:
+	l32i	a6, a3,  0
+	l32i	a7, a3,  4
+	s32i	a6, a5,  0
+	l32i	a6, a3,  8
+	s32i	a7, a5,  4
+	l32i	a7, a3, 12
+	s32i	a6, a5,  8
+	addi	a3, a3, 16
+	s32i	a7, a5, 12
+	addi	a5, a5, 16
+#if !XCHAL_HAVE_LOOPS
+	bne	a3, a8, .Loop1  # continue loop if a3:src != a8:src_end
+#endif /* !XCHAL_HAVE_LOOPS */
+.Loop1done:
+	bbci.l	a4, 3, .L2
+	# copy 8 bytes
+	l32i	a6, a3,  0
+	l32i	a7, a3,  4
+	addi	a3, a3,  8
+	s32i	a6, a5,  0
+	s32i	a7, a5,  4
+	addi	a5, a5,  8
+.L2:
+	bbsi.l	a4, 2, .L3
+	bbsi.l	a4, 1, .L4
+	bbsi.l	a4, 0, .L5
+	abi_ret_default
+.L3:
+	# copy 4 bytes
+	l32i	a6, a3,  0
+	addi	a3, a3,  4
+	s32i	a6, a5,  0
+	addi	a5, a5,  4
+	bbsi.l	a4, 1, .L4
+	bbsi.l	a4, 0, .L5
+	abi_ret_default
+.L4:
+	# copy 2 bytes
+	l16ui	a6, a3,  0
+	addi	a3, a3,  2
+	s16i	a6, a5,  0
+	addi	a5, a5,  2
+	bbsi.l	a4, 0, .L5
+	abi_ret_default
+.L5:
+	# copy 1 byte
+	l8ui	a6, a3,  0
+	s8i	a6, a5,  0
+	abi_ret_default
+
+/*
+ * Destination is aligned, Source is unaligned
+ */
+
+	.align	4
+.Lsrcunaligned:
+	_beqz	a4, .Ldone	# avoid loading anything for zero-length copies
+	# copy 16 bytes per iteration for word-aligned dst and unaligned src
+	__ssa8	a3		# set shift amount from byte offset
+
+/* set to 1 when running on ISS (simulator) with the
+   lint or ferret client, or 0 to save a few cycles */
+#define SIM_CHECKS_ALIGNMENT	1
+#if XCHAL_UNALIGNED_LOAD_EXCEPTION || SIM_CHECKS_ALIGNMENT
+	and	a11, a3, a8	# save unalignment offset for below
+	sub	a3, a3, a11	# align a3
+#endif
+	l32i	a6, a3, 0	# load first word
+#if XCHAL_HAVE_LOOPS
+	loopnez	a7, .Loop2done
+#else /* !XCHAL_HAVE_LOOPS */
+	beqz	a7, .Loop2done
+	slli	a10, a7, 4
+	add	a10, a10, a3	# a10 = end of last 16B source chunk
+#endif /* !XCHAL_HAVE_LOOPS */
+.Loop2:
+	l32i	a7, a3,  4
+	l32i	a8, a3,  8
+	__src_b	a6, a6, a7
+	s32i	a6, a5,  0
+	l32i	a9, a3, 12
+	__src_b	a7, a7, a8
+	s32i	a7, a5,  4
+	l32i	a6, a3, 16
+	__src_b	a8, a8, a9
+	s32i	a8, a5,  8
+	addi	a3, a3, 16
+	__src_b	a9, a9, a6
+	s32i	a9, a5, 12
+	addi	a5, a5, 16
+#if !XCHAL_HAVE_LOOPS
+	bne	a3, a10, .Loop2 # continue loop if a3:src != a10:src_end
+#endif /* !XCHAL_HAVE_LOOPS */
+.Loop2done:
+	bbci.l	a4, 3, .L12
+	# copy 8 bytes
+	l32i	a7, a3,  4
+	l32i	a8, a3,  8
+	__src_b	a6, a6, a7
+	s32i	a6, a5,  0
+	addi	a3, a3,  8
+	__src_b	a7, a7, a8
+	s32i	a7, a5,  4
+	addi	a5, a5,  8
+	mov	a6, a8
+.L12:
+	bbci.l	a4, 2, .L13
+	# copy 4 bytes
+	l32i	a7, a3,  4
+	addi	a3, a3,  4
+	__src_b	a6, a6, a7
+	s32i	a6, a5,  0
+	addi	a5, a5,  4
+	mov	a6, a7
+.L13:
+#if XCHAL_UNALIGNED_LOAD_EXCEPTION || SIM_CHECKS_ALIGNMENT
+	add	a3, a3, a11	# readjust a3 with correct misalignment
+#endif
+	bbsi.l	a4, 1, .L14
+	bbsi.l	a4, 0, .L15
+.Ldone:	abi_ret_default
+.L14:
+	# copy 2 bytes
+	l8ui	a6, a3,  0
+	l8ui	a7, a3,  1
+	addi	a3, a3,  2
+	s8i	a6, a5,  0
+	s8i	a7, a5,  1
+	addi	a5, a5,  2
+	bbsi.l	a4, 0, .L15
+	abi_ret_default
+.L15:
+	# copy 1 byte
+	l8ui	a6, a3,  0
+	s8i	a6, a5,  0
+	abi_ret_default
+
+ENDPROC(__memcpy)
+
+/*
+ * void bcopy(const void *src, void *dest, size_t n);
+ */
+
+ENTRY(bcopy)
+
+	abi_entry_default
+	# a2=src, a3=dst, a4=len
+	mov	a5, a3
+	mov	a3, a2
+	mov	a2, a5
+	j	.Lmovecommon	# go to common code for memmove+bcopy
+
+ENDPROC(bcopy)
+
+/*
+ * void *memmove(void *dst, const void *src, size_t len);
+ *
+ * This function is intended to do the same thing as the standard
+ * library function memmove() for most cases.
+ * However, where the source and/or destination references
+ * an instruction RAM or ROM or a data RAM or ROM, that
+ * source and/or destination will always be accessed with
+ * 32-bit load and store instructions (as required for these
+ * types of devices).
+ *
+ * !!!!!!!  XTFIXME:
+ * !!!!!!!  Handling of IRAM/IROM has not yet
+ * !!!!!!!  been implemented.
+ *
+ * The (general case) algorithm is as follows:
+ *   If end of source doesn't overlap destination then use memcpy.
+ *   Otherwise do memcpy backwards.
+ *
+ * Register use:
+ *	a0/ return address
+ *	a1/ stack pointer
+ *	a2/ return value
+ *	a3/ src
+ *	a4/ length
+ *	a5/ dst
+ *	a6/ tmp
+ *	a7/ tmp
+ *	a8/ tmp
+ *	a9/ tmp
+ *	a10/ tmp
+ *	a11/ tmp
+ */
+
+/*
+ * Byte by byte copy
+ */
+	.align	4
+	.byte	0		# 1 mod 4 alignment for LOOPNEZ
+				# (0 mod 4 alignment for LBEG)
+.Lbackbytecopy:
+#if XCHAL_HAVE_LOOPS
+	loopnez	a4, .Lbackbytecopydone
+#else /* !XCHAL_HAVE_LOOPS */
+	beqz	a4, .Lbackbytecopydone
+	sub	a7, a3, a4	# a7 = start address for source
+#endif /* !XCHAL_HAVE_LOOPS */
+.Lbacknextbyte:
+	addi	a3, a3, -1
+	l8ui	a6, a3, 0
+	addi	a5, a5, -1
+	s8i	a6, a5, 0
+#if !XCHAL_HAVE_LOOPS
+	bne	a3, a7, .Lbacknextbyte # continue loop if
+				       # $a3:src != $a7:src_start
+#endif /* !XCHAL_HAVE_LOOPS */
+.Lbackbytecopydone:
+	abi_ret_default
+
+/*
+ * Destination is unaligned
+ */
+
+	.align	4
+.Lbackdst1mod2:	# dst is only byte aligned
+	_bltui	a4, 7, .Lbackbytecopy	# do short copies byte by byte
+
+	# copy 1 byte
+	addi	a3, a3, -1
+	l8ui	a6, a3,  0
+	addi	a5, a5, -1
+	s8i	a6, a5,  0
+	addi	a4, a4, -1
+	_bbci.l	a5, 1, .Lbackdstaligned	# if dst is now aligned, then
+					# return to main algorithm
+.Lbackdst2mod4:	# dst 16-bit aligned
+	# copy 2 bytes
+	_bltui	a4, 6, .Lbackbytecopy	# do short copies byte by byte
+	addi	a3, a3, -2
+	l8ui	a6, a3,  0
+	l8ui	a7, a3,  1
+	addi	a5, a5, -2
+	s8i	a6, a5,  0
+	s8i	a7, a5,  1
+	addi	a4, a4, -2
+	j	.Lbackdstaligned	# dst is now aligned,
+					# return to main algorithm
+
+ENTRY(__memmove)
+WEAK(memmove)
+
+	abi_entry_default
+	# a2/ dst, a3/ src, a4/ len
+	mov	a5, a2		# copy dst so that a2 is return value
+.Lmovecommon:
+	sub	a6, a5, a3
+	bgeu	a6, a4, .Lcommon
+
+	add	a5, a5, a4
+	add	a3, a3, a4
+
+	_bbsi.l	a5, 0, .Lbackdst1mod2	# if dst is 1 mod 2
+	_bbsi.l	a5, 1, .Lbackdst2mod4	# if dst is 2 mod 4
+.Lbackdstaligned:	# return here from .Lbackdst?mod? once dst is aligned
+	srli	a7, a4, 4	# number of loop iterations with 16B
+				# per iteration
+	movi	a8, 3		# if source is not aligned,
+	_bany	a3, a8, .Lbacksrcunaligned	# then use shifting copy
+	/*
+	 * Destination and source are word-aligned, use word copy.
+	 */
+	# copy 16 bytes per iteration for word-aligned dst and word-aligned src
+#if XCHAL_HAVE_LOOPS
+	loopnez	a7, .LbackLoop1done
+#else /* !XCHAL_HAVE_LOOPS */
+	beqz	a7, .LbackLoop1done
+	slli	a8, a7, 4
+	sub	a8, a3, a8	# a8 = start of first 16B source chunk
+#endif /* !XCHAL_HAVE_LOOPS */
+.LbackLoop1:
+	addi	a3, a3, -16
+	l32i	a7, a3, 12
+	l32i	a6, a3,  8
+	addi	a5, a5, -16
+	s32i	a7, a5, 12
+	l32i	a7, a3,  4
+	s32i	a6, a5,  8
+	l32i	a6, a3,  0
+	s32i	a7, a5,  4
+	s32i	a6, a5,  0
+#if !XCHAL_HAVE_LOOPS
+	bne	a3, a8, .LbackLoop1  # continue loop if a3:src != a8:src_start
+#endif /* !XCHAL_HAVE_LOOPS */
+.LbackLoop1done:
+	bbci.l	a4, 3, .Lback2
+	# copy 8 bytes
+	addi	a3, a3, -8
+	l32i	a6, a3,  0
+	l32i	a7, a3,  4
+	addi	a5, a5, -8
+	s32i	a6, a5,  0
+	s32i	a7, a5,  4
+.Lback2:
+	bbsi.l	a4, 2, .Lback3
+	bbsi.l	a4, 1, .Lback4
+	bbsi.l	a4, 0, .Lback5
+	abi_ret_default
+.Lback3:
+	# copy 4 bytes
+	addi	a3, a3, -4
+	l32i	a6, a3,  0
+	addi	a5, a5, -4
+	s32i	a6, a5,  0
+	bbsi.l	a4, 1, .Lback4
+	bbsi.l	a4, 0, .Lback5
+	abi_ret_default
+.Lback4:
+	# copy 2 bytes
+	addi	a3, a3, -2
+	l16ui	a6, a3,  0
+	addi	a5, a5, -2
+	s16i	a6, a5,  0
+	bbsi.l	a4, 0, .Lback5
+	abi_ret_default
+.Lback5:
+	# copy 1 byte
+	addi	a3, a3, -1
+	l8ui	a6, a3,  0
+	addi	a5, a5, -1
+	s8i	a6, a5,  0
+	abi_ret_default
+
+/*
+ * Destination is aligned, Source is unaligned
+ */
+
+	.align	4
+.Lbacksrcunaligned:
+	_beqz	a4, .Lbackdone	# avoid loading anything for zero-length copies
+	# copy 16 bytes per iteration for word-aligned dst and unaligned src
+	__ssa8	a3		# set shift amount from byte offset
+#define SIM_CHECKS_ALIGNMENT	1	/* set to 1 when running on ISS with
+					 * the lint or ferret client, or 0
+					 * to save a few cycles */
+#if XCHAL_UNALIGNED_LOAD_EXCEPTION || SIM_CHECKS_ALIGNMENT
+	and	a11, a3, a8	# save unalignment offset for below
+	sub	a3, a3, a11	# align a3
+#endif
+	l32i	a6, a3, 0	# load first word
+#if XCHAL_HAVE_LOOPS
+	loopnez	a7, .LbackLoop2done
+#else /* !XCHAL_HAVE_LOOPS */
+	beqz	a7, .LbackLoop2done
+	slli	a10, a7, 4
+	sub	a10, a3, a10	# a10 = start of first 16B source chunk
+#endif /* !XCHAL_HAVE_LOOPS */
+.LbackLoop2:
+	addi	a3, a3, -16
+	l32i	a7, a3, 12
+	l32i	a8, a3,  8
+	addi	a5, a5, -16
+	__src_b	a6, a7, a6
+	s32i	a6, a5, 12
+	l32i	a9, a3,  4
+	__src_b	a7, a8, a7
+	s32i	a7, a5,  8
+	l32i	a6, a3,  0
+	__src_b	a8, a9, a8
+	s32i	a8, a5,  4
+	__src_b	a9, a6, a9
+	s32i	a9, a5,  0
+#if !XCHAL_HAVE_LOOPS
+	bne	a3, a10, .LbackLoop2 # continue loop if a3:src != a10:src_start
+#endif /* !XCHAL_HAVE_LOOPS */
+.LbackLoop2done:
+	bbci.l	a4, 3, .Lback12
+	# copy 8 bytes
+	addi	a3, a3, -8
+	l32i	a7, a3,  4
+	l32i	a8, a3,  0
+	addi	a5, a5, -8
+	__src_b	a6, a7, a6
+	s32i	a6, a5,  4
+	__src_b	a7, a8, a7
+	s32i	a7, a5,  0
+	mov	a6, a8
+.Lback12:
+	bbci.l	a4, 2, .Lback13
+	# copy 4 bytes
+	addi	a3, a3, -4
+	l32i	a7, a3,  0
+	addi	a5, a5, -4
+	__src_b	a6, a7, a6
+	s32i	a6, a5,  0
+	mov	a6, a7
+.Lback13:
+#if XCHAL_UNALIGNED_LOAD_EXCEPTION || SIM_CHECKS_ALIGNMENT
+	add	a3, a3, a11	# readjust a3 with correct misalignment
+#endif
+	bbsi.l	a4, 1, .Lback14
+	bbsi.l	a4, 0, .Lback15
+.Lbackdone:
+	abi_ret_default
+.Lback14:
+	# copy 2 bytes
+	addi	a3, a3, -2
+	l8ui	a6, a3,  0
+	l8ui	a7, a3,  1
+	addi	a5, a5, -2
+	s8i	a6, a5,  0
+	s8i	a7, a5,  1
+	bbsi.l	a4, 0, .Lback15
+	abi_ret_default
+.Lback15:
+	# copy 1 byte
+	addi	a3, a3, -1
+	addi	a5, a5, -1
+	l8ui	a6, a3,  0
+	s8i	a6, a5,  0
+	abi_ret_default
+
+ENDPROC(__memmove)
diff --git a/arch/xtensa/lib/memset.S b/arch/xtensa/lib/memset.S
new file mode 100644
index 000000000..59b1524fd
--- /dev/null
+++ b/arch/xtensa/lib/memset.S
@@ -0,0 +1,153 @@
+/*
+ *  arch/xtensa/lib/memset.S
+ *
+ *  ANSI C standard library function memset
+ *  (Well, almost.  .fixup code might return zero.)
+ *
+ *  This file is subject to the terms and conditions of the GNU General
+ *  Public License.  See the file "COPYING" in the main directory of
+ *  this archive for more details.
+ *
+ *  Copyright (C) 2002 Tensilica Inc.
+ */
+
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+/*
+ * void *memset(void *dst, int c, size_t length)
+ *
+ * The algorithm is as follows:
+ *   Create a word with c in all byte positions
+ *   If the destination is aligned,
+ *     do 16B chucks with a loop, and then finish up with
+ *     8B, 4B, 2B, and 1B stores conditional on the length.
+ *   If destination is unaligned, align it by conditionally
+ *     setting 1B and 2B and then go to aligned case.
+ *   This code tries to use fall-through branches for the common
+ *     case of an aligned destination (except for the branches to
+ *     the alignment labels).
+ */
+
+.text
+ENTRY(__memset)
+WEAK(memset)
+
+	abi_entry_default
+	# a2/ dst, a3/ c, a4/ length
+	extui	a3, a3, 0, 8	# mask to just 8 bits
+	slli	a7, a3, 8	# duplicate character in all bytes of word
+	or	a3, a3, a7	# ...
+	slli	a7, a3, 16	# ...
+	or	a3, a3, a7	# ...
+	mov	a5, a2		# copy dst so that a2 is return value
+	movi	a6, 3		# for alignment tests
+	bany	a2, a6, .Ldstunaligned # if dst is unaligned
+.L0:	# return here from .Ldstunaligned when dst is aligned
+	srli	a7, a4, 4	# number of loop iterations with 16B
+				# per iteration
+	bnez	a4, .Laligned
+	abi_ret_default
+
+/*
+ * Destination is word-aligned.
+ */
+	# set 16 bytes per iteration for word-aligned dst
+	.align	4		# 1 mod 4 alignment for LOOPNEZ
+	.byte	0		# (0 mod 4 alignment for LBEG)
+.Laligned:
+#if XCHAL_HAVE_LOOPS
+	loopnez	a7, .Loop1done
+#else /* !XCHAL_HAVE_LOOPS */
+	beqz	a7, .Loop1done
+	slli	a6, a7, 4
+	add	a6, a6, a5	# a6 = end of last 16B chunk
+#endif /* !XCHAL_HAVE_LOOPS */
+.Loop1:
+EX(10f) s32i	a3, a5,  0
+EX(10f) s32i	a3, a5,  4
+EX(10f) s32i	a3, a5,  8
+EX(10f) s32i	a3, a5, 12
+	addi	a5, a5, 16
+#if !XCHAL_HAVE_LOOPS
+	blt	a5, a6, .Loop1
+#endif /* !XCHAL_HAVE_LOOPS */
+.Loop1done:
+	bbci.l	a4, 3, .L2
+	# set 8 bytes
+EX(10f) s32i	a3, a5,  0
+EX(10f) s32i	a3, a5,  4
+	addi	a5, a5,  8
+.L2:
+	bbci.l	a4, 2, .L3
+	# set 4 bytes
+EX(10f) s32i	a3, a5,  0
+	addi	a5, a5,  4
+.L3:
+	bbci.l	a4, 1, .L4
+	# set 2 bytes
+EX(10f) s16i	a3, a5,  0
+	addi	a5, a5,  2
+.L4:
+	bbci.l	a4, 0, .L5
+	# set 1 byte
+EX(10f) s8i	a3, a5,  0
+.L5:
+.Lret1:
+	abi_ret_default
+
+/*
+ * Destination is unaligned
+ */
+
+.Ldstunaligned:
+	bltui	a4, 8, .Lbyteset	# do short copies byte by byte
+	bbci.l	a5, 0, .L20		# branch if dst alignment half-aligned
+	# dst is only byte aligned
+	# set 1 byte
+EX(10f) s8i	a3, a5,  0
+	addi	a5, a5,  1
+	addi	a4, a4, -1
+	# now retest if dst aligned
+	bbci.l	a5, 1, .L0	# if now aligned, return to main algorithm
+.L20:
+	# dst half-aligned
+	# set 2 bytes
+EX(10f) s16i	a3, a5,  0
+	addi	a5, a5,  2
+	addi	a4, a4, -2
+	j	.L0		# dst is now aligned, return to main algorithm
+
+/*
+ * Byte by byte set
+ */
+	.align	4
+	.byte	0		# 1 mod 4 alignment for LOOPNEZ
+				# (0 mod 4 alignment for LBEG)
+.Lbyteset:
+#if XCHAL_HAVE_LOOPS
+	loopnez	a4, .Lbytesetdone
+#else /* !XCHAL_HAVE_LOOPS */
+	beqz	a4, .Lbytesetdone
+	add	a6, a5, a4	# a6 = ending address
+#endif /* !XCHAL_HAVE_LOOPS */
+.Lbyteloop:
+EX(10f) s8i	a3, a5, 0
+	addi	a5, a5, 1
+#if !XCHAL_HAVE_LOOPS
+	blt	a5, a6, .Lbyteloop
+#endif /* !XCHAL_HAVE_LOOPS */
+.Lbytesetdone:
+	abi_ret_default
+
+ENDPROC(__memset)
+
+	.section .fixup, "ax"
+	.align	4
+
+/* We return zero if a failure occurred. */
+
+10:
+	movi	a2, 0
+	abi_ret_default
diff --git a/arch/xtensa/lib/modsi3.S b/arch/xtensa/lib/modsi3.S
new file mode 100644
index 000000000..d00e77181
--- /dev/null
+++ b/arch/xtensa/lib/modsi3.S
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0 */
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+ENTRY(__modsi3)
+
+	abi_entry_default
+#if XCHAL_HAVE_DIV32
+	rems	a2, a2, a3
+#else
+	mov	a7, a2		/* save original (signed) dividend */
+	do_abs	a2, a2, a4	/* udividend = abs (dividend) */
+	do_abs	a3, a3, a4	/* udivisor = abs (divisor) */
+	bltui	a3, 2, .Lle_one	/* check if udivisor <= 1 */
+	do_nsau	a5, a2, a6, a8	/* udividend_shift = nsau (udividend) */
+	do_nsau	a4, a3, a6, a8	/* udivisor_shift = nsau (udivisor) */
+	bgeu	a5, a4, .Lspecial
+
+	sub	a4, a4, a5	/* count = udivisor_shift - udividend_shift */
+	ssl	a4
+	sll	a3, a3		/* udivisor <<= count */
+
+	/* test-subtract-and-shift loop */
+#if XCHAL_HAVE_LOOPS
+	loopnez	a4, .Lloopend
+#endif /* XCHAL_HAVE_LOOPS */
+.Lloop:
+	bltu	a2, a3, .Lzerobit
+	sub	a2, a2, a3
+.Lzerobit:
+	srli	a3, a3, 1
+#if !XCHAL_HAVE_LOOPS
+	addi	a4, a4, -1
+	bnez	a4, .Lloop
+#endif /* !XCHAL_HAVE_LOOPS */
+.Lloopend:
+
+.Lspecial:
+	bltu	a2, a3, .Lreturn
+	sub	a2, a2, a3	/* subtract again if udividend >= udivisor */
+.Lreturn:
+	bgez	a7, .Lpositive
+	neg	a2, a2		/* if (dividend < 0), return -udividend */
+.Lpositive:
+	abi_ret_default
+
+.Lle_one:
+	bnez	a3, .Lreturn0
+
+	/* Divide by zero: Use an illegal instruction to force an exception.
+	   The subsequent "DIV0" string can be recognized by the exception
+	   handler to identify the real cause of the exception.  */
+	ill
+	.ascii	"DIV0"
+
+.Lreturn0:
+	movi	a2, 0
+#endif /* XCHAL_HAVE_DIV32 */
+	abi_ret_default
+
+ENDPROC(__modsi3)
+
+#if !XCHAL_HAVE_NSA
+	.section .rodata
+	.align	4
+	.global	__nsau_data
+	.type	__nsau_data, @object
+__nsau_data:
+	.byte	8, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4
+	.byte	3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
+	.byte	2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
+	.byte	2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
+	.byte	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
+	.byte	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
+	.byte	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
+	.byte	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
+	.byte	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+	.byte	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+	.byte	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+	.byte	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+	.byte	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+	.byte	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+	.byte	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+	.byte	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+	.size	__nsau_data, . - __nsau_data
+#endif /* !XCHAL_HAVE_NSA */
diff --git a/arch/xtensa/lib/mulsi3.S b/arch/xtensa/lib/mulsi3.S
new file mode 100644
index 000000000..91a9d7c62
--- /dev/null
+++ b/arch/xtensa/lib/mulsi3.S
@@ -0,0 +1,133 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0 */
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+	.macro	do_addx2 dst, as, at, tmp
+#if XCHAL_HAVE_ADDX
+	addx2	\dst, \as, \at
+#else
+	slli	\tmp, \as, 1
+	add	\dst, \tmp, \at
+#endif
+	.endm
+
+	.macro	do_addx4 dst, as, at, tmp
+#if XCHAL_HAVE_ADDX
+	addx4	\dst, \as, \at
+#else
+	slli	\tmp, \as, 2
+	add	\dst, \tmp, \at
+#endif
+	.endm
+
+	.macro	do_addx8 dst, as, at, tmp
+#if XCHAL_HAVE_ADDX
+	addx8	\dst, \as, \at
+#else
+	slli	\tmp, \as, 3
+	add	\dst, \tmp, \at
+#endif
+	.endm
+
+ENTRY(__mulsi3)
+
+	abi_entry_default
+
+#if XCHAL_HAVE_MUL32
+	mull	a2, a2, a3
+
+#elif XCHAL_HAVE_MUL16
+	or	a4, a2, a3
+	srai	a4, a4, 16
+	bnez	a4, .LMUL16
+	mul16u	a2, a2, a3
+	abi_ret_default
+.LMUL16:
+	srai	a4, a2, 16
+	srai	a5, a3, 16
+	mul16u	a7, a4, a3
+	mul16u	a6, a5, a2
+	mul16u	a4, a2, a3
+	add	a7, a7, a6
+	slli	a7, a7, 16
+	add	a2, a7, a4
+
+#elif XCHAL_HAVE_MAC16
+	mul.aa.hl a2, a3
+	mula.aa.lh a2, a3
+	rsr	a5, ACCLO
+	umul.aa.ll a2, a3
+	rsr	a4, ACCLO
+	slli	a5, a5, 16
+	add	a2, a4, a5
+
+#else /* !MUL32 && !MUL16 && !MAC16 */
+
+	/* Multiply one bit at a time, but unroll the loop 4x to better
+	   exploit the addx instructions and avoid overhead.
+	   Peel the first iteration to save a cycle on init.  */
+
+	/* Avoid negative numbers.  */
+	xor	a5, a2, a3	/* Top bit is 1 if one input is negative.  */
+	do_abs	a3, a3, a6
+	do_abs	a2, a2, a6
+
+	/* Swap so the second argument is smaller.  */
+	sub	a7, a2, a3
+	mov	a4, a3
+	movgez	a4, a2, a7	/* a4 = max (a2, a3) */
+	movltz	a3, a2, a7	/* a3 = min (a2, a3) */
+
+	movi	a2, 0
+	extui	a6, a3, 0, 1
+	movnez	a2, a4, a6
+
+	do_addx2 a7, a4, a2, a7
+	extui	a6, a3, 1, 1
+	movnez	a2, a7, a6
+
+	do_addx4 a7, a4, a2, a7
+	extui	a6, a3, 2, 1
+	movnez	a2, a7, a6
+
+	do_addx8 a7, a4, a2, a7
+	extui	a6, a3, 3, 1
+	movnez	a2, a7, a6
+
+	bgeui	a3, 16, .Lmult_main_loop
+	neg	a3, a2
+	movltz	a2, a3, a5
+	abi_ret_default
+
+	.align	4
+.Lmult_main_loop:
+	srli	a3, a3, 4
+	slli	a4, a4, 4
+
+	add	a7, a4, a2
+	extui	a6, a3, 0, 1
+	movnez	a2, a7, a6
+
+	do_addx2 a7, a4, a2, a7
+	extui	a6, a3, 1, 1
+	movnez	a2, a7, a6
+
+	do_addx4 a7, a4, a2, a7
+	extui	a6, a3, 2, 1
+	movnez	a2, a7, a6
+
+	do_addx8 a7, a4, a2, a7
+	extui	a6, a3, 3, 1
+	movnez	a2, a7, a6
+
+	bgeui	a3, 16, .Lmult_main_loop
+
+	neg	a3, a2
+	movltz	a2, a3, a5
+
+#endif /* !MUL32 && !MUL16 && !MAC16 */
+
+	abi_ret_default
+
+ENDPROC(__mulsi3)
diff --git a/arch/xtensa/lib/pci-auto.c b/arch/xtensa/lib/pci-auto.c
new file mode 100644
index 000000000..aa6752237
--- /dev/null
+++ b/arch/xtensa/lib/pci-auto.c
@@ -0,0 +1,316 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * arch/xtensa/lib/pci-auto.c
+ *
+ * PCI autoconfiguration library
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ *
+ * Chris Zankel <zankel@tensilica.com, cez@zankel.net>
+ *
+ * Based on work from Matt Porter <mporter@mvista.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+
+#include <asm/pci-bridge.h>
+
+
+/*
+ *
+ * Setting up a PCI
+ *
+ * pci_ctrl->first_busno = <first bus number (0)>
+ * pci_ctrl->last_busno = <last bus number (0xff)>
+ * pci_ctrl->ops = <PCI config operations>
+ * pci_ctrl->map_irq = <function to return the interrupt number for a device>
+ *
+ * pci_ctrl->io_space.start = <IO space start address (PCI view)>
+ * pci_ctrl->io_space.end = <IO space end address (PCI view)>
+ * pci_ctrl->io_space.base = <IO space offset: address 0 from CPU space>
+ * pci_ctrl->mem_space.start = <MEM space start address (PCI view)>
+ * pci_ctrl->mem_space.end = <MEM space end address (PCI view)>
+ * pci_ctrl->mem_space.base = <MEM space offset: address 0 from CPU space>
+ *
+ * pcibios_init_resource(&pci_ctrl->io_resource, <IO space start>,
+ * 			 <IO space end>, IORESOURCE_IO, "PCI host bridge");
+ * pcibios_init_resource(&pci_ctrl->mem_resources[0], <MEM space start>,
+ * 			 <MEM space end>, IORESOURCE_MEM, "PCI host bridge");
+ *
+ * pci_ctrl->last_busno = pciauto_bus_scan(pci_ctrl,pci_ctrl->first_busno);
+ *
+ * int __init pciauto_bus_scan(struct pci_controller *pci_ctrl, int current_bus)
+ *
+ */
+
+static int pciauto_upper_iospc;
+static int pciauto_upper_memspc;
+
+static struct pci_dev pciauto_dev;
+static struct pci_bus pciauto_bus;
+
+/*
+ * Helper functions
+ */
+
+/* Initialize the bars of a PCI device.  */
+
+static void __init
+pciauto_setup_bars(struct pci_dev *dev, int bar_limit)
+{
+	int bar_size;
+	int bar, bar_nr;
+	int *upper_limit;
+	int found_mem64 = 0;
+
+	for (bar = PCI_BASE_ADDRESS_0, bar_nr = 0;
+	     bar <= bar_limit;
+	     bar+=4, bar_nr++)
+	{
+		/* Tickle the BAR and get the size */
+		pci_write_config_dword(dev, bar, 0xffffffff);
+		pci_read_config_dword(dev, bar, &bar_size);
+
+		/* If BAR is not implemented go to the next BAR */
+		if (!bar_size)
+			continue;
+
+		/* Check the BAR type and set our address mask */
+		if (bar_size & PCI_BASE_ADDRESS_SPACE_IO)
+		{
+			bar_size &= PCI_BASE_ADDRESS_IO_MASK;
+			upper_limit = &pciauto_upper_iospc;
+			pr_debug("PCI Autoconfig: BAR %d, I/O, ", bar_nr);
+		}
+		else
+		{
+			if ((bar_size & PCI_BASE_ADDRESS_MEM_TYPE_MASK) ==
+			    PCI_BASE_ADDRESS_MEM_TYPE_64)
+				found_mem64 = 1;
+
+			bar_size &= PCI_BASE_ADDRESS_MEM_MASK;
+			upper_limit = &pciauto_upper_memspc;
+			pr_debug("PCI Autoconfig: BAR %d, Mem, ", bar_nr);
+		}
+
+		/* Allocate a base address (bar_size is negative!) */
+		*upper_limit = (*upper_limit + bar_size) & bar_size;
+
+		/* Write it out and update our limit */
+		pci_write_config_dword(dev, bar, *upper_limit);
+
+		/*
+		 * If we are a 64-bit decoder then increment to the
+		 * upper 32 bits of the bar and force it to locate
+		 * in the lower 4GB of memory.
+		 */
+
+		if (found_mem64)
+			pci_write_config_dword(dev, (bar+=4), 0x00000000);
+
+		pr_debug("size=0x%x, address=0x%x\n",
+			 ~bar_size + 1, *upper_limit);
+	}
+}
+
+/* Initialize the interrupt number. */
+
+static void __init
+pciauto_setup_irq(struct pci_controller* pci_ctrl,struct pci_dev *dev,int devfn)
+{
+	u8 pin;
+	int irq = 0;
+
+	pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
+
+	/* Fix illegal pin numbers. */
+
+	if (pin == 0 || pin > 4)
+		pin = 1;
+
+	if (pci_ctrl->map_irq)
+		irq = pci_ctrl->map_irq(dev, PCI_SLOT(devfn), pin);
+
+	if (irq == -1)
+		irq = 0;
+
+	pr_debug("PCI Autoconfig: Interrupt %d, pin %d\n", irq, pin);
+
+	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
+}
+
+
+static void __init
+pciauto_prescan_setup_bridge(struct pci_dev *dev, int current_bus,
+			     int sub_bus, int *iosave, int *memsave)
+{
+	/* Configure bus number registers */
+	pci_write_config_byte(dev, PCI_PRIMARY_BUS, current_bus);
+	pci_write_config_byte(dev, PCI_SECONDARY_BUS, sub_bus + 1);
+	pci_write_config_byte(dev, PCI_SUBORDINATE_BUS,	0xff);
+
+	/* Round memory allocator to 1MB boundary */
+	pciauto_upper_memspc &= ~(0x100000 - 1);
+	*memsave = pciauto_upper_memspc;
+
+	/* Round I/O allocator to 4KB boundary */
+	pciauto_upper_iospc &= ~(0x1000 - 1);
+	*iosave = pciauto_upper_iospc;
+
+	/* Set up memory and I/O filter limits, assume 32-bit I/O space */
+	pci_write_config_word(dev, PCI_MEMORY_LIMIT,
+			      ((pciauto_upper_memspc - 1) & 0xfff00000) >> 16);
+	pci_write_config_byte(dev, PCI_IO_LIMIT,
+			      ((pciauto_upper_iospc - 1) & 0x0000f000) >> 8);
+	pci_write_config_word(dev, PCI_IO_LIMIT_UPPER16,
+			      ((pciauto_upper_iospc - 1) & 0xffff0000) >> 16);
+}
+
+static void __init
+pciauto_postscan_setup_bridge(struct pci_dev *dev, int current_bus, int sub_bus,
+			      int *iosave, int *memsave)
+{
+	int cmdstat;
+
+	/* Configure bus number registers */
+	pci_write_config_byte(dev, PCI_SUBORDINATE_BUS,	sub_bus);
+
+	/*
+	 * Round memory allocator to 1MB boundary.
+	 * If no space used, allocate minimum.
+	 */
+	pciauto_upper_memspc &= ~(0x100000 - 1);
+	if (*memsave == pciauto_upper_memspc)
+		pciauto_upper_memspc -= 0x00100000;
+
+	pci_write_config_word(dev, PCI_MEMORY_BASE, pciauto_upper_memspc >> 16);
+
+	/* Allocate 1MB for pre-fretch */
+	pci_write_config_word(dev, PCI_PREF_MEMORY_LIMIT,
+			      ((pciauto_upper_memspc - 1) & 0xfff00000) >> 16);
+
+	pciauto_upper_memspc -= 0x100000;
+
+	pci_write_config_word(dev, PCI_PREF_MEMORY_BASE,
+			      pciauto_upper_memspc >> 16);
+
+	/* Round I/O allocator to 4KB boundary */
+	pciauto_upper_iospc &= ~(0x1000 - 1);
+	if (*iosave == pciauto_upper_iospc)
+		pciauto_upper_iospc -= 0x1000;
+
+	pci_write_config_byte(dev, PCI_IO_BASE,
+			      (pciauto_upper_iospc & 0x0000f000) >> 8);
+	pci_write_config_word(dev, PCI_IO_BASE_UPPER16,
+			      pciauto_upper_iospc >> 16);
+
+	/* Enable memory and I/O accesses, enable bus master */
+	pci_read_config_dword(dev, PCI_COMMAND, &cmdstat);
+	pci_write_config_dword(dev, PCI_COMMAND,
+			       cmdstat |
+			       PCI_COMMAND_IO |
+			       PCI_COMMAND_MEMORY |
+			       PCI_COMMAND_MASTER);
+}
+
+/*
+ * Scan the current PCI bus.
+ */
+
+
+int __init pciauto_bus_scan(struct pci_controller *pci_ctrl, int current_bus)
+{
+	int sub_bus, pci_devfn, pci_class, cmdstat, found_multi=0;
+	unsigned short vid;
+	unsigned char header_type;
+	struct pci_dev *dev = &pciauto_dev;
+
+	pciauto_dev.bus = &pciauto_bus;
+	pciauto_dev.sysdata = pci_ctrl;
+	pciauto_bus.ops = pci_ctrl->ops;
+
+	/*
+	 * Fetch our I/O and memory space upper boundaries used
+	 * to allocated base addresses on this pci_controller.
+	 */
+
+	if (current_bus == pci_ctrl->first_busno)
+	{
+		pciauto_upper_iospc = pci_ctrl->io_resource.end + 1;
+		pciauto_upper_memspc = pci_ctrl->mem_resources[0].end + 1;
+	}
+
+	sub_bus = current_bus;
+
+	for (pci_devfn = 0; pci_devfn < 0xff; pci_devfn++)
+	{
+		/* Skip our host bridge */
+		if ((current_bus == pci_ctrl->first_busno) && (pci_devfn == 0))
+			continue;
+
+		if (PCI_FUNC(pci_devfn) && !found_multi)
+			continue;
+
+		pciauto_bus.number = current_bus;
+		pciauto_dev.devfn = pci_devfn;
+
+		/* If config space read fails from this device, move on */
+		if (pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type))
+			continue;
+
+		if (!PCI_FUNC(pci_devfn))
+			found_multi = header_type & 0x80;
+		pci_read_config_word(dev, PCI_VENDOR_ID, &vid);
+
+		if (vid == 0xffff || vid == 0x0000) {
+			found_multi = 0;
+			continue;
+		}
+
+		pci_read_config_dword(dev, PCI_CLASS_REVISION, &pci_class);
+
+		if ((pci_class >> 16) == PCI_CLASS_BRIDGE_PCI) {
+
+			int iosave, memsave;
+
+			pr_debug("PCI Autoconfig: Found P2P bridge, device %d\n",
+				 PCI_SLOT(pci_devfn));
+
+			/* Allocate PCI I/O and/or memory space */
+			pciauto_setup_bars(dev, PCI_BASE_ADDRESS_1);
+
+			pciauto_prescan_setup_bridge(dev, current_bus, sub_bus,
+					&iosave, &memsave);
+			sub_bus = pciauto_bus_scan(pci_ctrl, sub_bus+1);
+			pciauto_postscan_setup_bridge(dev, current_bus, sub_bus,
+					&iosave, &memsave);
+			pciauto_bus.number = current_bus;
+
+			continue;
+
+		}
+
+		/*
+		 * Found a peripheral, enable some standard
+		 * settings
+		 */
+
+		pci_read_config_dword(dev, PCI_COMMAND,	&cmdstat);
+		pci_write_config_dword(dev, PCI_COMMAND,
+				cmdstat |
+					PCI_COMMAND_IO |
+					PCI_COMMAND_MEMORY |
+					PCI_COMMAND_MASTER);
+		pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x80);
+
+		/* Allocate PCI I/O and/or memory space */
+		pr_debug("PCI Autoconfig: Found Bus %d, Device %d, Function %d\n",
+			 current_bus, PCI_SLOT(pci_devfn), PCI_FUNC(pci_devfn));
+
+		pciauto_setup_bars(dev, PCI_BASE_ADDRESS_5);
+		pciauto_setup_irq(pci_ctrl, dev, pci_devfn);
+	}
+	return sub_bus;
+}
diff --git a/arch/xtensa/lib/strncpy_user.S b/arch/xtensa/lib/strncpy_user.S
new file mode 100644
index 000000000..073191222
--- /dev/null
+++ b/arch/xtensa/lib/strncpy_user.S
@@ -0,0 +1,216 @@
+/*
+ *  arch/xtensa/lib/strncpy_user.S
+ *
+ *  This file is subject to the terms and conditions of the GNU General
+ *  Public License.  See the file "COPYING" in the main directory of
+ *  this archive for more details.
+ *
+ *  Returns: -EFAULT if exception before terminator, N if the entire
+ *  buffer filled, else strlen.
+ *
+ *  Copyright (C) 2002 Tensilica Inc.
+ */
+
+#include <linux/errno.h>
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+/*
+ * char *__strncpy_user(char *dst, const char *src, size_t len)
+ */
+
+#ifdef __XTENSA_EB__
+# define MASK0 0xff000000
+# define MASK1 0x00ff0000
+# define MASK2 0x0000ff00
+# define MASK3 0x000000ff
+#else
+# define MASK0 0x000000ff
+# define MASK1 0x0000ff00
+# define MASK2 0x00ff0000
+# define MASK3 0xff000000
+#endif
+
+# Register use
+#   a0/ return address
+#   a1/ stack pointer
+#   a2/ return value
+#   a3/ src
+#   a4/ len
+#   a5/ mask0
+#   a6/ mask1
+#   a7/ mask2
+#   a8/ mask3
+#   a9/ tmp
+#   a10/ tmp
+#   a11/ dst
+
+.text
+ENTRY(__strncpy_user)
+
+	abi_entry_default
+	# a2/ dst, a3/ src, a4/ len
+	mov	a11, a2		# leave dst in return value register
+	beqz	a4, .Lret	# if len is zero
+	movi	a5, MASK0	# mask for byte 0
+	movi	a6, MASK1	# mask for byte 1
+	movi	a7, MASK2	# mask for byte 2
+	movi	a8, MASK3	# mask for byte 3
+	bbsi.l	a3, 0, .Lsrc1mod2 # if only  8-bit aligned
+	bbsi.l	a3, 1, .Lsrc2mod4 # if only 16-bit aligned
+.Lsrcaligned:	# return here when src is word-aligned
+	srli	a10, a4, 2	# number of loop iterations with 4B per loop
+	movi	a9, 3
+	bnone	a11, a9, .Laligned
+	j	.Ldstunaligned
+
+.Lsrc1mod2:	# src address is odd
+EX(11f)	l8ui	a9, a3, 0		# get byte 0
+	addi	a3, a3, 1		# advance src pointer
+EX(10f)	s8i	a9, a11, 0		# store byte 0
+	beqz	a9, .Lret		# if byte 0 is zero
+	addi	a11, a11, 1		# advance dst pointer
+	addi	a4, a4, -1		# decrement len
+	beqz	a4, .Lret		# if len is zero
+	bbci.l	a3, 1, .Lsrcaligned	# if src is now word-aligned
+
+.Lsrc2mod4:	# src address is 2 mod 4
+EX(11f)	l8ui	a9, a3, 0		# get byte 0
+	/* 1-cycle interlock */
+EX(10f)	s8i	a9, a11, 0		# store byte 0
+	beqz	a9, .Lret		# if byte 0 is zero
+	addi	a11, a11, 1		# advance dst pointer
+	addi	a4, a4, -1		# decrement len
+	beqz	a4, .Lret		# if len is zero
+EX(11f)	l8ui	a9, a3, 1		# get byte 0
+	addi	a3, a3, 2		# advance src pointer
+EX(10f)	s8i	a9, a11, 0		# store byte 0
+	beqz	a9, .Lret		# if byte 0 is zero
+	addi	a11, a11, 1		# advance dst pointer
+	addi	a4, a4, -1		# decrement len
+	bnez	a4, .Lsrcaligned	# if len is nonzero
+.Lret:
+	sub	a2, a11, a2		# compute strlen
+	abi_ret_default
+
+/*
+ * dst is word-aligned, src is word-aligned
+ */
+	.align	4		# 1 mod 4 alignment for LOOPNEZ
+	.byte	0		# (0 mod 4 alignment for LBEG)
+.Laligned:
+#if XCHAL_HAVE_LOOPS
+	loopnez	a10, .Loop1done
+#else
+	beqz	a10, .Loop1done
+	slli	a10, a10, 2
+	add	a10, a10, a11	# a10 = end of last 4B chunck
+#endif
+.Loop1:
+EX(11f)	l32i	a9, a3, 0		# get word from src
+	addi	a3, a3, 4		# advance src pointer
+	bnone	a9, a5, .Lz0		# if byte 0 is zero
+	bnone	a9, a6, .Lz1		# if byte 1 is zero
+	bnone	a9, a7, .Lz2		# if byte 2 is zero
+EX(10f)	s32i	a9, a11, 0		# store word to dst
+	bnone	a9, a8, .Lz3		# if byte 3 is zero
+	addi	a11, a11, 4		# advance dst pointer
+#if !XCHAL_HAVE_LOOPS
+	blt	a11, a10, .Loop1
+#endif
+
+.Loop1done:
+	bbci.l	a4, 1, .L100
+	# copy 2 bytes
+EX(11f)	l16ui	a9, a3, 0
+	addi	a3, a3, 2		# advance src pointer
+#ifdef __XTENSA_EB__
+	bnone	a9, a7, .Lz0		# if byte 2 is zero
+	bnone	a9, a8, .Lz1		# if byte 3 is zero
+#else
+	bnone	a9, a5, .Lz0		# if byte 0 is zero
+	bnone	a9, a6, .Lz1		# if byte 1 is zero
+#endif
+EX(10f)	s16i	a9, a11, 0
+	addi	a11, a11, 2		# advance dst pointer
+.L100:
+	bbci.l	a4, 0, .Lret
+EX(11f)	l8ui	a9, a3, 0
+	/* slot */
+EX(10f)	s8i	a9, a11, 0
+	beqz	a9, .Lret		# if byte is zero
+	addi	a11, a11, 1-3		# advance dst ptr 1, but also cancel
+					# the effect of adding 3 in .Lz3 code
+	/* fall thru to .Lz3 and "retw" */
+
+.Lz3:	# byte 3 is zero
+	addi	a11, a11, 3		# advance dst pointer
+	sub	a2, a11, a2		# compute strlen
+	abi_ret_default
+.Lz0:	# byte 0 is zero
+#ifdef __XTENSA_EB__
+	movi	a9, 0
+#endif /* __XTENSA_EB__ */
+EX(10f)	s8i	a9, a11, 0
+	sub	a2, a11, a2		# compute strlen
+	abi_ret_default
+.Lz1:	# byte 1 is zero
+#ifdef __XTENSA_EB__
+	extui   a9, a9, 16, 16
+#endif /* __XTENSA_EB__ */
+EX(10f)	s16i	a9, a11, 0
+	addi	a11, a11, 1		# advance dst pointer
+	sub	a2, a11, a2		# compute strlen
+	abi_ret_default
+.Lz2:	# byte 2 is zero
+#ifdef __XTENSA_EB__
+	extui   a9, a9, 16, 16
+#endif /* __XTENSA_EB__ */
+EX(10f)	s16i	a9, a11, 0
+	movi	a9, 0
+EX(10f)	s8i	a9, a11, 2
+	addi	a11, a11, 2		# advance dst pointer
+	sub	a2, a11, a2		# compute strlen
+	abi_ret_default
+
+	.align	4		# 1 mod 4 alignment for LOOPNEZ
+	.byte	0		# (0 mod 4 alignment for LBEG)
+.Ldstunaligned:
+/*
+ * for now just use byte copy loop
+ */
+#if XCHAL_HAVE_LOOPS
+	loopnez	a4, .Lunalignedend
+#else
+	beqz	a4, .Lunalignedend
+	add	a10, a11, a4		# a10 = ending address
+#endif /* XCHAL_HAVE_LOOPS */
+.Lnextbyte:
+EX(11f)	l8ui	a9, a3, 0
+	addi	a3, a3, 1
+EX(10f)	s8i	a9, a11, 0
+	beqz	a9, .Lunalignedend
+	addi	a11, a11, 1
+#if !XCHAL_HAVE_LOOPS
+	blt	a11, a10, .Lnextbyte
+#endif
+
+.Lunalignedend:
+	sub	a2, a11, a2		# compute strlen
+	abi_ret_default
+
+ENDPROC(__strncpy_user)
+
+	.section .fixup, "ax"
+	.align	4
+
+	/* For now, just return -EFAULT.  Future implementations might
+	 * like to clear remaining kernel space, like the fixup
+	 * implementation in memset().  Thus, we differentiate between
+	 * load/store fixups. */
+
+10:
+11:
+	movi	a2, -EFAULT
+	abi_ret_default
diff --git a/arch/xtensa/lib/strnlen_user.S b/arch/xtensa/lib/strnlen_user.S
new file mode 100644
index 000000000..3d391dca3
--- /dev/null
+++ b/arch/xtensa/lib/strnlen_user.S
@@ -0,0 +1,141 @@
+/*
+ *  arch/xtensa/lib/strnlen_user.S
+ *
+ *  This file is subject to the terms and conditions of the GNU General
+ *  Public License.  See the file "COPYING" in the main directory of
+ *  this archive for more details.
+ *
+ *  Returns strnlen, including trailing zero terminator.
+ *  Zero indicates error.
+ *
+ *  Copyright (C) 2002 Tensilica Inc.
+ */
+
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+/*
+ * size_t __strnlen_user(const char *s, size_t len)
+ */
+
+#ifdef __XTENSA_EB__
+# define MASK0 0xff000000
+# define MASK1 0x00ff0000
+# define MASK2 0x0000ff00
+# define MASK3 0x000000ff
+#else
+# define MASK0 0x000000ff
+# define MASK1 0x0000ff00
+# define MASK2 0x00ff0000
+# define MASK3 0xff000000
+#endif
+
+# Register use:
+#   a2/ src
+#   a3/ len
+#   a4/ tmp
+#   a5/ mask0
+#   a6/ mask1
+#   a7/ mask2
+#   a8/ mask3
+#   a9/ tmp
+#   a10/ tmp
+
+.text
+ENTRY(__strnlen_user)
+
+	abi_entry_default
+	# a2/ s, a3/ len
+	addi	a4, a2, -4	# because we overincrement at the end;
+				# we compensate with load offsets of 4
+	movi	a5, MASK0	# mask for byte 0
+	movi	a6, MASK1	# mask for byte 1
+	movi	a7, MASK2	# mask for byte 2
+	movi	a8, MASK3	# mask for byte 3
+	bbsi.l	a2, 0, .L1mod2	# if only  8-bit aligned
+	bbsi.l	a2, 1, .L2mod4	# if only 16-bit aligned
+
+/*
+ * String is word-aligned.
+ */
+.Laligned:
+	srli	a10, a3, 2	# number of loop iterations with 4B per loop
+#if XCHAL_HAVE_LOOPS
+	loopnez	a10, .Ldone
+#else
+	beqz	a10, .Ldone
+	slli	a10, a10, 2
+	add	a10, a10, a4	# a10 = end of last 4B chunk
+#endif /* XCHAL_HAVE_LOOPS */
+.Loop:
+EX(10f)	l32i	a9, a4, 4		# get next word of string
+	addi	a4, a4, 4		# advance string pointer
+	bnone	a9, a5, .Lz0		# if byte 0 is zero
+	bnone	a9, a6, .Lz1		# if byte 1 is zero
+	bnone	a9, a7, .Lz2		# if byte 2 is zero
+	bnone	a9, a8, .Lz3		# if byte 3 is zero
+#if !XCHAL_HAVE_LOOPS
+	blt	a4, a10, .Loop
+#endif
+
+.Ldone:
+EX(10f)	l32i	a9, a4, 4	# load 4 bytes for remaining checks
+
+	bbci.l	a3, 1, .L100
+	# check two more bytes (bytes 0, 1 of word)
+	addi	a4, a4, 2	# advance string pointer
+	bnone	a9, a5, .Lz0	# if byte 0 is zero
+	bnone	a9, a6, .Lz1	# if byte 1 is zero
+.L100:
+	bbci.l	a3, 0, .L101
+	# check one more byte (byte 2 of word)
+	# Actually, we don't need to check.  Zero or nonzero, we'll add one.
+	# Do not add an extra one for the NULL terminator since we have
+	#  exhausted the original len parameter.
+	addi	a4, a4, 1	# advance string pointer
+.L101:
+	sub	a2, a4, a2	# compute length
+	abi_ret_default
+
+# NOTE that in several places below, we point to the byte just after
+# the zero byte in order to include the NULL terminator in the count.
+
+.Lz3:	# byte 3 is zero
+	addi	a4, a4, 3	# point to zero byte
+.Lz0:	# byte 0 is zero
+	addi	a4, a4, 1	# point just beyond zero byte
+	sub	a2, a4, a2	# subtract to get length
+	abi_ret_default
+.Lz1:	# byte 1 is zero
+	addi	a4, a4, 1+1	# point just beyond zero byte
+	sub	a2, a4, a2	# subtract to get length
+	abi_ret_default
+.Lz2:	# byte 2 is zero
+	addi	a4, a4, 2+1	# point just beyond zero byte
+	sub	a2, a4, a2	# subtract to get length
+	abi_ret_default
+
+.L1mod2:	# address is odd
+EX(10f)	l8ui	a9, a4, 4		# get byte 0
+	addi	a4, a4, 1		# advance string pointer
+	beqz	a9, .Lz3		# if byte 0 is zero
+	bbci.l	a4, 1, .Laligned	# if string pointer is now word-aligned
+
+.L2mod4:	# address is 2 mod 4
+	addi	a4, a4, 2	# advance ptr for aligned access
+EX(10f)	l32i	a9, a4, 0	# get word with first two bytes of string
+	bnone	a9, a7, .Lz2	# if byte 2 (of word, not string) is zero
+	bany	a9, a8, .Laligned # if byte 3 (of word, not string) is nonzero
+	# byte 3 is zero
+	addi	a4, a4, 3+1	# point just beyond zero byte
+	sub	a2, a4, a2	# subtract to get length
+	abi_ret_default
+
+ENDPROC(__strnlen_user)
+
+	.section .fixup, "ax"
+	.align	4
+10:
+	movi	a2, 0
+	abi_ret_default
diff --git a/arch/xtensa/lib/udivsi3.S b/arch/xtensa/lib/udivsi3.S
new file mode 100644
index 000000000..d2477e078
--- /dev/null
+++ b/arch/xtensa/lib/udivsi3.S
@@ -0,0 +1,68 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0 */
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+ENTRY(__udivsi3)
+
+	abi_entry_default
+#if XCHAL_HAVE_DIV32
+	quou	a2, a2, a3
+#else
+	bltui	a3, 2, .Lle_one	/* check if the divisor <= 1 */
+
+	mov	a6, a2		/* keep dividend in a6 */
+	do_nsau	a5, a6, a2, a7	/* dividend_shift = nsau (dividend) */
+	do_nsau	a4, a3, a2, a7	/* divisor_shift = nsau (divisor) */
+	bgeu	a5, a4, .Lspecial
+
+	sub	a4, a4, a5	/* count = divisor_shift - dividend_shift */
+	ssl	a4
+	sll	a3, a3		/* divisor <<= count */
+	movi	a2, 0		/* quotient = 0 */
+
+	/* test-subtract-and-shift loop; one quotient bit on each iteration */
+#if XCHAL_HAVE_LOOPS
+	loopnez	a4, .Lloopend
+#endif /* XCHAL_HAVE_LOOPS */
+.Lloop:
+	bltu	a6, a3, .Lzerobit
+	sub	a6, a6, a3
+	addi	a2, a2, 1
+.Lzerobit:
+	slli	a2, a2, 1
+	srli	a3, a3, 1
+#if !XCHAL_HAVE_LOOPS
+	addi	a4, a4, -1
+	bnez	a4, .Lloop
+#endif /* !XCHAL_HAVE_LOOPS */
+.Lloopend:
+
+	bltu	a6, a3, .Lreturn
+	addi	a2, a2, 1	/* increment quotient if dividend >= divisor */
+.Lreturn:
+	abi_ret_default
+
+.Lle_one:
+	beqz	a3, .Lerror	/* if divisor == 1, return the dividend */
+	abi_ret_default
+
+.Lspecial:
+	/* return dividend >= divisor */
+	bltu	a6, a3, .Lreturn0
+	movi	a2, 1
+	abi_ret_default
+
+.Lerror:
+	/* Divide by zero: Use an illegal instruction to force an exception.
+	   The subsequent "DIV0" string can be recognized by the exception
+	   handler to identify the real cause of the exception.  */
+	ill
+	.ascii	"DIV0"
+
+.Lreturn0:
+	movi	a2, 0
+#endif /* XCHAL_HAVE_DIV32 */
+	abi_ret_default
+
+ENDPROC(__udivsi3)
diff --git a/arch/xtensa/lib/umodsi3.S b/arch/xtensa/lib/umodsi3.S
new file mode 100644
index 000000000..5f031bfa0
--- /dev/null
+++ b/arch/xtensa/lib/umodsi3.S
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0 */
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+ENTRY(__umodsi3)
+
+	abi_entry_default
+#if XCHAL_HAVE_DIV32
+	remu	a2, a2, a3
+#else
+	bltui	a3, 2, .Lle_one	/* check if the divisor is <= 1 */
+
+	do_nsau	a5, a2, a6, a7	/* dividend_shift = nsau (dividend) */
+	do_nsau	a4, a3, a6, a7	/* divisor_shift = nsau (divisor) */
+	bgeu	a5, a4, .Lspecial
+
+	sub	a4, a4, a5	/* count = divisor_shift - dividend_shift */
+	ssl	a4
+	sll	a3, a3		/* divisor <<= count */
+
+	/* test-subtract-and-shift loop */
+#if XCHAL_HAVE_LOOPS
+	loopnez	a4, .Lloopend
+#endif /* XCHAL_HAVE_LOOPS */
+.Lloop:
+	bltu	a2, a3, .Lzerobit
+	sub	a2, a2, a3
+.Lzerobit:
+	srli	a3, a3, 1
+#if !XCHAL_HAVE_LOOPS
+	addi	a4, a4, -1
+	bnez	a4, .Lloop
+#endif /* !XCHAL_HAVE_LOOPS */
+.Lloopend:
+
+.Lspecial:
+	bltu	a2, a3, .Lreturn
+	sub	a2, a2, a3	/* subtract once more if dividend >= divisor */
+.Lreturn:
+	abi_ret_default
+
+.Lle_one:
+	bnez	a3, .Lreturn0
+
+	/* Divide by zero: Use an illegal instruction to force an exception.
+	   The subsequent "DIV0" string can be recognized by the exception
+	   handler to identify the real cause of the exception.  */
+	ill
+	.ascii	"DIV0"
+
+.Lreturn0:
+	movi	a2, 0
+#endif /* XCHAL_HAVE_DIV32 */
+	abi_ret_default
+
+ENDPROC(__umodsi3)
diff --git a/arch/xtensa/lib/umulsidi3.S b/arch/xtensa/lib/umulsidi3.S
new file mode 100644
index 000000000..4d9ba2387
--- /dev/null
+++ b/arch/xtensa/lib/umulsidi3.S
@@ -0,0 +1,232 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0 */
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+#if XCHAL_HAVE_MUL16 || XCHAL_HAVE_MUL32 || XCHAL_HAVE_MAC16
+#define XCHAL_NO_MUL 0
+#else
+#define XCHAL_NO_MUL 1
+#endif
+
+ENTRY(__umulsidi3)
+
+#ifdef __XTENSA_CALL0_ABI__
+	abi_entry(32)
+	s32i	a12, sp, 16
+	s32i	a13, sp, 20
+	s32i	a14, sp, 24
+	s32i	a15, sp, 28
+#elif XCHAL_NO_MUL
+	/* This is not really a leaf function; allocate enough stack space
+	   to allow CALL12s to a helper function.  */
+	abi_entry(32)
+#else
+	abi_entry_default
+#endif
+
+#ifdef __XTENSA_EB__
+#define wh a2
+#define wl a3
+#else
+#define wh a3
+#define wl a2
+#endif /* __XTENSA_EB__ */
+
+	/* This code is taken from the mulsf3 routine in ieee754-sf.S.
+	   See more comments there.  */
+
+#if XCHAL_HAVE_MUL32_HIGH
+	mull	a6, a2, a3
+	muluh	wh, a2, a3
+	mov	wl, a6
+
+#else /* ! MUL32_HIGH */
+
+#if defined(__XTENSA_CALL0_ABI__) && XCHAL_NO_MUL
+	/* a0 and a8 will be clobbered by calling the multiply function
+	   but a8 is not used here and need not be saved.  */
+	s32i	a0, sp, 0
+#endif
+
+#if XCHAL_HAVE_MUL16 || XCHAL_HAVE_MUL32
+
+#define a2h a4
+#define a3h a5
+
+	/* Get the high halves of the inputs into registers.  */
+	srli	a2h, a2, 16
+	srli	a3h, a3, 16
+
+#define a2l a2
+#define a3l a3
+
+#if XCHAL_HAVE_MUL32 && !XCHAL_HAVE_MUL16
+	/* Clear the high halves of the inputs.  This does not matter
+	   for MUL16 because the high bits are ignored.  */
+	extui	a2, a2, 0, 16
+	extui	a3, a3, 0, 16
+#endif
+#endif /* MUL16 || MUL32 */
+
+
+#if XCHAL_HAVE_MUL16
+
+#define do_mul(dst, xreg, xhalf, yreg, yhalf) \
+	mul16u	dst, xreg ## xhalf, yreg ## yhalf
+
+#elif XCHAL_HAVE_MUL32
+
+#define do_mul(dst, xreg, xhalf, yreg, yhalf) \
+	mull	dst, xreg ## xhalf, yreg ## yhalf
+
+#elif XCHAL_HAVE_MAC16
+
+/* The preprocessor insists on inserting a space when concatenating after
+   a period in the definition of do_mul below.  These macros are a workaround
+   using underscores instead of periods when doing the concatenation.  */
+#define umul_aa_ll umul.aa.ll
+#define umul_aa_lh umul.aa.lh
+#define umul_aa_hl umul.aa.hl
+#define umul_aa_hh umul.aa.hh
+
+#define do_mul(dst, xreg, xhalf, yreg, yhalf) \
+	umul_aa_ ## xhalf ## yhalf	xreg, yreg; \
+	rsr	dst, ACCLO
+
+#else /* no multiply hardware */
+
+#define set_arg_l(dst, src) \
+	extui	dst, src, 0, 16
+#define set_arg_h(dst, src) \
+	srli	dst, src, 16
+
+#ifdef __XTENSA_CALL0_ABI__
+#define do_mul(dst, xreg, xhalf, yreg, yhalf) \
+	set_arg_ ## xhalf (a13, xreg); \
+	set_arg_ ## yhalf (a14, yreg); \
+	call0	.Lmul_mulsi3; \
+	mov	dst, a12
+#else
+#define do_mul(dst, xreg, xhalf, yreg, yhalf) \
+	set_arg_ ## xhalf (a14, xreg); \
+	set_arg_ ## yhalf (a15, yreg); \
+	call12	.Lmul_mulsi3; \
+	mov	dst, a14
+#endif /* __XTENSA_CALL0_ABI__ */
+
+#endif /* no multiply hardware */
+
+	/* Add pp1 and pp2 into a6 with carry-out in a9.  */
+	do_mul(a6, a2, l, a3, h)	/* pp 1 */
+	do_mul(a11, a2, h, a3, l)	/* pp 2 */
+	movi	a9, 0
+	add	a6, a6, a11
+	bgeu	a6, a11, 1f
+	addi	a9, a9, 1
+1:
+	/* Shift the high half of a9/a6 into position in a9.  Note that
+	   this value can be safely incremented without any carry-outs.  */
+	ssai	16
+	src	a9, a9, a6
+
+	/* Compute the low word into a6.  */
+	do_mul(a11, a2, l, a3, l)	/* pp 0 */
+	sll	a6, a6
+	add	a6, a6, a11
+	bgeu	a6, a11, 1f
+	addi	a9, a9, 1
+1:
+	/* Compute the high word into wh.  */
+	do_mul(wh, a2, h, a3, h)	/* pp 3 */
+	add	wh, wh, a9
+	mov	wl, a6
+
+#endif /* !MUL32_HIGH */
+
+#if defined(__XTENSA_CALL0_ABI__) && XCHAL_NO_MUL
+	/* Restore the original return address.  */
+	l32i	a0, sp, 0
+#endif
+#ifdef __XTENSA_CALL0_ABI__
+	l32i	a12, sp, 16
+	l32i	a13, sp, 20
+	l32i	a14, sp, 24
+	l32i	a15, sp, 28
+	abi_ret(32)
+#else
+	abi_ret_default
+#endif
+
+#if XCHAL_NO_MUL
+
+	.macro	do_addx2 dst, as, at, tmp
+#if XCHAL_HAVE_ADDX
+	addx2	\dst, \as, \at
+#else
+	slli	\tmp, \as, 1
+	add	\dst, \tmp, \at
+#endif
+	.endm
+
+	.macro	do_addx4 dst, as, at, tmp
+#if XCHAL_HAVE_ADDX
+	addx4	\dst, \as, \at
+#else
+	slli	\tmp, \as, 2
+	add	\dst, \tmp, \at
+#endif
+	.endm
+
+	.macro	do_addx8 dst, as, at, tmp
+#if XCHAL_HAVE_ADDX
+	addx8	\dst, \as, \at
+#else
+	slli	\tmp, \as, 3
+	add	\dst, \tmp, \at
+#endif
+	.endm
+
+	/* For Xtensa processors with no multiply hardware, this simplified
+	   version of _mulsi3 is used for multiplying 16-bit chunks of
+	   the floating-point mantissas.  When using CALL0, this function
+	   uses a custom ABI: the inputs are passed in a13 and a14, the
+	   result is returned in a12, and a8 and a15 are clobbered.  */
+	.align	4
+.Lmul_mulsi3:
+	abi_entry_default
+
+	.macro mul_mulsi3_body dst, src1, src2, tmp1, tmp2
+	movi	\dst, 0
+1:	add	\tmp1, \src2, \dst
+	extui	\tmp2, \src1, 0, 1
+	movnez	\dst, \tmp1, \tmp2
+
+	do_addx2 \tmp1, \src2, \dst, \tmp1
+	extui	\tmp2, \src1, 1, 1
+	movnez	\dst, \tmp1, \tmp2
+
+	do_addx4 \tmp1, \src2, \dst, \tmp1
+	extui	\tmp2, \src1, 2, 1
+	movnez	\dst, \tmp1, \tmp2
+
+	do_addx8 \tmp1, \src2, \dst, \tmp1
+	extui	\tmp2, \src1, 3, 1
+	movnez	\dst, \tmp1, \tmp2
+
+	srli	\src1, \src1, 4
+	slli	\src2, \src2, 4
+	bnez	\src1, 1b
+	.endm
+
+#ifdef __XTENSA_CALL0_ABI__
+	mul_mulsi3_body a12, a13, a14, a15, a8
+#else
+	/* The result will be written into a2, so save that argument in a4.  */
+	mov	a4, a2
+	mul_mulsi3_body a2, a4, a3, a5, a6
+#endif
+	abi_ret_default
+#endif /* XCHAL_NO_MUL */
+
+ENDPROC(__umulsidi3)
diff --git a/arch/xtensa/lib/usercopy.S b/arch/xtensa/lib/usercopy.S
new file mode 100644
index 000000000..16128c094
--- /dev/null
+++ b/arch/xtensa/lib/usercopy.S
@@ -0,0 +1,300 @@
+/*
+ *  arch/xtensa/lib/usercopy.S
+ *
+ *  Copy to/from user space (derived from arch/xtensa/lib/hal/memcopy.S)
+ *
+ *  DO NOT COMBINE this function with <arch/xtensa/lib/hal/memcopy.S>.
+ *  It needs to remain separate and distinct.  The hal files are part
+ *  of the Xtensa link-time HAL, and those files may differ per
+ *  processor configuration.  Patching the kernel for another
+ *  processor configuration includes replacing the hal files, and we
+ *  could lose the special functionality for accessing user-space
+ *  memory during such a patch.  We sacrifice a little code space here
+ *  in favor to simplify code maintenance.
+ *
+ *  This file is subject to the terms and conditions of the GNU General
+ *  Public License.  See the file "COPYING" in the main directory of
+ *  this archive for more details.
+ *
+ *  Copyright (C) 2002 Tensilica Inc.
+ */
+
+
+/*
+ * size_t __xtensa_copy_user (void *dst, const void *src, size_t len);
+ *
+ * The returned value is the number of bytes not copied.  Implies zero
+ * is success.
+ *
+ * The general case algorithm is as follows:
+ *   If the destination and source are both aligned,
+ *     do 16B chunks with a loop, and then finish up with
+ *     8B, 4B, 2B, and 1B copies conditional on the length.
+ *   If destination is aligned and source unaligned,
+ *     do the same, but use SRC to align the source data.
+ *   If destination is unaligned, align it by conditionally
+ *     copying 1B and 2B and then retest.
+ *   This code tries to use fall-through braches for the common
+ *     case of aligned destinations (except for the branches to
+ *     the alignment label).
+ *
+ * Register use:
+ *	a0/ return address
+ *	a1/ stack pointer
+ *	a2/ return value
+ *	a3/ src
+ *	a4/ length
+ *	a5/ dst
+ *	a6/ tmp
+ *	a7/ tmp
+ *	a8/ tmp
+ *	a9/ tmp
+ *	a10/ tmp
+ *	a11/ original length
+ */
+
+#include <linux/linkage.h>
+#include <asm/asmmacro.h>
+#include <asm/core.h>
+
+	.text
+ENTRY(__xtensa_copy_user)
+
+#if !XCHAL_HAVE_LOOPS && defined(__XTENSA_CALL0_ABI__)
+#define STACK_SIZE 4
+#else
+#define STACK_SIZE 0
+#endif
+	abi_entry(STACK_SIZE)
+	# a2/ dst, a3/ src, a4/ len
+	mov	a5, a2		# copy dst so that a2 is return value
+	mov	a11, a4		# preserve original len for error case
+.Lcommon:
+	bbsi.l	a2, 0, .Ldst1mod2 # if dst is 1 mod 2
+	bbsi.l	a2, 1, .Ldst2mod4 # if dst is 2 mod 4
+.Ldstaligned:	# return here from .Ldstunaligned when dst is aligned
+	srli	a7, a4, 4	# number of loop iterations with 16B
+				# per iteration
+	movi	a8, 3		  # if source is also aligned,
+	bnone	a3, a8, .Laligned # then use word copy
+	__ssa8	a3		# set shift amount from byte offset
+	bnez	a4, .Lsrcunaligned
+	movi	a2, 0		# return success for len==0
+	abi_ret(STACK_SIZE)
+
+/*
+ * Destination is unaligned
+ */
+
+.Ldst1mod2:	# dst is only byte aligned
+	bltui	a4, 7, .Lbytecopy	# do short copies byte by byte
+
+	# copy 1 byte
+EX(10f)	l8ui	a6, a3, 0
+	addi	a3, a3,  1
+EX(10f)	s8i	a6, a5,  0
+	addi	a5, a5,  1
+	addi	a4, a4, -1
+	bbci.l	a5, 1, .Ldstaligned	# if dst is now aligned, then
+					# return to main algorithm
+.Ldst2mod4:	# dst 16-bit aligned
+	# copy 2 bytes
+	bltui	a4, 6, .Lbytecopy	# do short copies byte by byte
+EX(10f)	l8ui	a6, a3, 0
+EX(10f)	l8ui	a7, a3, 1
+	addi	a3, a3,  2
+EX(10f)	s8i	a6, a5,  0
+EX(10f)	s8i	a7, a5,  1
+	addi	a5, a5,  2
+	addi	a4, a4, -2
+	j	.Ldstaligned	# dst is now aligned, return to main algorithm
+
+/*
+ * Byte by byte copy
+ */
+	.align	4
+	.byte	0		# 1 mod 4 alignment for LOOPNEZ
+				# (0 mod 4 alignment for LBEG)
+.Lbytecopy:
+#if XCHAL_HAVE_LOOPS
+	loopnez	a4, .Lbytecopydone
+#else /* !XCHAL_HAVE_LOOPS */
+	beqz	a4, .Lbytecopydone
+	add	a7, a3, a4	# a7 = end address for source
+#endif /* !XCHAL_HAVE_LOOPS */
+.Lnextbyte:
+EX(10f)	l8ui	a6, a3, 0
+	addi	a3, a3, 1
+EX(10f)	s8i	a6, a5, 0
+	addi	a5, a5, 1
+#if !XCHAL_HAVE_LOOPS
+	blt	a3, a7, .Lnextbyte
+#endif /* !XCHAL_HAVE_LOOPS */
+.Lbytecopydone:
+	movi	a2, 0		# return success for len bytes copied
+	abi_ret(STACK_SIZE)
+
+/*
+ * Destination and source are word-aligned.
+ */
+	# copy 16 bytes per iteration for word-aligned dst and word-aligned src
+	.align	4		# 1 mod 4 alignment for LOOPNEZ
+	.byte	0		# (0 mod 4 alignment for LBEG)
+.Laligned:
+#if XCHAL_HAVE_LOOPS
+	loopnez	a7, .Loop1done
+#else /* !XCHAL_HAVE_LOOPS */
+	beqz	a7, .Loop1done
+	slli	a8, a7, 4
+	add	a8, a8, a3	# a8 = end of last 16B source chunk
+#endif /* !XCHAL_HAVE_LOOPS */
+.Loop1:
+EX(10f)	l32i	a6, a3,  0
+EX(10f)	l32i	a7, a3,  4
+EX(10f)	s32i	a6, a5,  0
+EX(10f)	l32i	a6, a3,  8
+EX(10f)	s32i	a7, a5,  4
+EX(10f)	l32i	a7, a3, 12
+EX(10f)	s32i	a6, a5,  8
+	addi	a3, a3, 16
+EX(10f)	s32i	a7, a5, 12
+	addi	a5, a5, 16
+#if !XCHAL_HAVE_LOOPS
+	blt	a3, a8, .Loop1
+#endif /* !XCHAL_HAVE_LOOPS */
+.Loop1done:
+	bbci.l	a4, 3, .L2
+	# copy 8 bytes
+EX(10f)	l32i	a6, a3,  0
+EX(10f)	l32i	a7, a3,  4
+	addi	a3, a3,  8
+EX(10f)	s32i	a6, a5,  0
+EX(10f)	s32i	a7, a5,  4
+	addi	a5, a5,  8
+.L2:
+	bbci.l	a4, 2, .L3
+	# copy 4 bytes
+EX(10f)	l32i	a6, a3,  0
+	addi	a3, a3,  4
+EX(10f)	s32i	a6, a5,  0
+	addi	a5, a5,  4
+.L3:
+	bbci.l	a4, 1, .L4
+	# copy 2 bytes
+EX(10f)	l16ui	a6, a3,  0
+	addi	a3, a3,  2
+EX(10f)	s16i	a6, a5,  0
+	addi	a5, a5,  2
+.L4:
+	bbci.l	a4, 0, .L5
+	# copy 1 byte
+EX(10f)	l8ui	a6, a3,  0
+EX(10f)	s8i	a6, a5,  0
+.L5:
+	movi	a2, 0		# return success for len bytes copied
+	abi_ret(STACK_SIZE)
+
+/*
+ * Destination is aligned, Source is unaligned
+ */
+
+	.align	4
+	.byte	0		# 1 mod 4 alignement for LOOPNEZ
+				# (0 mod 4 alignment for LBEG)
+.Lsrcunaligned:
+	# copy 16 bytes per iteration for word-aligned dst and unaligned src
+	and	a10, a3, a8	# save unalignment offset for below
+	sub	a3, a3, a10	# align a3 (to avoid sim warnings only; not needed for hardware)
+EX(10f)	l32i	a6, a3, 0	# load first word
+#if XCHAL_HAVE_LOOPS
+	loopnez	a7, .Loop2done
+#else /* !XCHAL_HAVE_LOOPS */
+	beqz	a7, .Loop2done
+#if defined(__XTENSA_CALL0_ABI__)
+	s32i	a10, a1, 0
+	slli	a10, a7, 4
+	add	a10, a10, a3	# a10 = end of last 16B source chunk
+#else
+	slli	a12, a7, 4
+	add	a12, a12, a3	# a12 = end of last 16B source chunk
+#endif
+#endif /* !XCHAL_HAVE_LOOPS */
+.Loop2:
+EX(10f)	l32i	a7, a3,  4
+EX(10f)	l32i	a8, a3,  8
+	__src_b	a6, a6, a7
+EX(10f)	s32i	a6, a5,  0
+EX(10f)	l32i	a9, a3, 12
+	__src_b	a7, a7, a8
+EX(10f)	s32i	a7, a5,  4
+EX(10f)	l32i	a6, a3, 16
+	__src_b	a8, a8, a9
+EX(10f)	s32i	a8, a5,  8
+	addi	a3, a3, 16
+	__src_b	a9, a9, a6
+EX(10f)	s32i	a9, a5, 12
+	addi	a5, a5, 16
+#if !XCHAL_HAVE_LOOPS
+#if defined(__XTENSA_CALL0_ABI__)
+	blt	a3, a10, .Loop2
+	l32i	a10, a1, 0
+#else
+	blt	a3, a12, .Loop2
+#endif
+#endif /* !XCHAL_HAVE_LOOPS */
+.Loop2done:
+	bbci.l	a4, 3, .L12
+	# copy 8 bytes
+EX(10f)	l32i	a7, a3,  4
+EX(10f)	l32i	a8, a3,  8
+	__src_b	a6, a6, a7
+EX(10f)	s32i	a6, a5,  0
+	addi	a3, a3,  8
+	__src_b	a7, a7, a8
+EX(10f)	s32i	a7, a5,  4
+	addi	a5, a5,  8
+	mov	a6, a8
+.L12:
+	bbci.l	a4, 2, .L13
+	# copy 4 bytes
+EX(10f)	l32i	a7, a3,  4
+	addi	a3, a3,  4
+	__src_b	a6, a6, a7
+EX(10f)	s32i	a6, a5,  0
+	addi	a5, a5,  4
+	mov	a6, a7
+.L13:
+	add	a3, a3, a10	# readjust a3 with correct misalignment
+	bbci.l	a4, 1, .L14
+	# copy 2 bytes
+EX(10f)	l8ui	a6, a3,  0
+EX(10f)	l8ui	a7, a3,  1
+	addi	a3, a3,  2
+EX(10f)	s8i	a6, a5,  0
+EX(10f)	s8i	a7, a5,  1
+	addi	a5, a5,  2
+.L14:
+	bbci.l	a4, 0, .L15
+	# copy 1 byte
+EX(10f)	l8ui	a6, a3,  0
+EX(10f)	s8i	a6, a5,  0
+.L15:
+	movi	a2, 0		# return success for len bytes copied
+	abi_ret(STACK_SIZE)
+
+ENDPROC(__xtensa_copy_user)
+
+	.section .fixup, "ax"
+	.align	4
+
+/* a2 = original dst; a5 = current dst; a11= original len
+ * bytes_copied = a5 - a2
+ * retval = bytes_not_copied = original len - bytes_copied
+ * retval = a11 - (a5 - a2)
+ */
+
+
+10:
+	sub	a2, a5, a2	/* a2 <-- bytes copied */
+	sub	a2, a11, a2	/* a2 <-- bytes not copied */
+	abi_ret(STACK_SIZE)
diff --git a/arch/xtensa/mm/Makefile b/arch/xtensa/mm/Makefile
new file mode 100644
index 000000000..44153a335
--- /dev/null
+++ b/arch/xtensa/mm/Makefile
@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the Linux/Xtensa-specific parts of the memory manager.
+#
+
+obj-y			:= init.o misc.o
+obj-$(CONFIG_PFAULT)	+= fault.o
+obj-$(CONFIG_MMU)	+= cache.o ioremap.o mmu.o tlb.o
+obj-$(CONFIG_HIGHMEM)	+= highmem.o
+obj-$(CONFIG_KASAN)	+= kasan_init.o
+
+KASAN_SANITIZE_fault.o := n
+KASAN_SANITIZE_kasan_init.o := n
+KASAN_SANITIZE_mmu.o := n
diff --git a/arch/xtensa/mm/cache.c b/arch/xtensa/mm/cache.c
new file mode 100644
index 000000000..19e5a478a
--- /dev/null
+++ b/arch/xtensa/mm/cache.c
@@ -0,0 +1,322 @@
+/*
+ * arch/xtensa/mm/cache.c
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001-2006 Tensilica Inc.
+ *
+ * Chris Zankel	<chris@zankel.net>
+ * Joe Taylor
+ * Marc Gauthier
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/memblock.h>
+#include <linux/swap.h>
+#include <linux/pagemap.h>
+#include <linux/pgtable.h>
+
+#include <asm/bootparam.h>
+#include <asm/mmu_context.h>
+#include <asm/tlb.h>
+#include <asm/tlbflush.h>
+#include <asm/page.h>
+
+/* 
+ * Note:
+ * The kernel provides one architecture bit PG_arch_1 in the page flags that 
+ * can be used for cache coherency.
+ *
+ * I$-D$ coherency.
+ *
+ * The Xtensa architecture doesn't keep the instruction cache coherent with
+ * the data cache. We use the architecture bit to indicate if the caches
+ * are coherent. The kernel clears this bit whenever a page is added to the
+ * page cache. At that time, the caches might not be in sync. We, therefore,
+ * define this flag as 'clean' if set.
+ *
+ * D-cache aliasing.
+ *
+ * With cache aliasing, we have to always flush the cache when pages are
+ * unmapped (see tlb_start_vma(). So, we use this flag to indicate a dirty
+ * page.
+ * 
+ *
+ *
+ */
+
+#if (DCACHE_WAY_SIZE > PAGE_SIZE)
+static inline void kmap_invalidate_coherent(struct page *page,
+					    unsigned long vaddr)
+{
+	if (!DCACHE_ALIAS_EQ(page_to_phys(page), vaddr)) {
+		unsigned long kvaddr;
+
+		if (!PageHighMem(page)) {
+			kvaddr = (unsigned long)page_to_virt(page);
+
+			__invalidate_dcache_page(kvaddr);
+		} else {
+			kvaddr = TLBTEMP_BASE_1 +
+				(page_to_phys(page) & DCACHE_ALIAS_MASK);
+
+			preempt_disable();
+			__invalidate_dcache_page_alias(kvaddr,
+						       page_to_phys(page));
+			preempt_enable();
+		}
+	}
+}
+
+static inline void *coherent_kvaddr(struct page *page, unsigned long base,
+				    unsigned long vaddr, unsigned long *paddr)
+{
+	*paddr = page_to_phys(page);
+	return (void *)(base + (vaddr & DCACHE_ALIAS_MASK));
+}
+
+void clear_user_highpage(struct page *page, unsigned long vaddr)
+{
+	unsigned long paddr;
+	void *kvaddr = coherent_kvaddr(page, TLBTEMP_BASE_1, vaddr, &paddr);
+
+	preempt_disable();
+	kmap_invalidate_coherent(page, vaddr);
+	set_bit(PG_arch_1, &page->flags);
+	clear_page_alias(kvaddr, paddr);
+	preempt_enable();
+}
+EXPORT_SYMBOL(clear_user_highpage);
+
+void copy_user_highpage(struct page *dst, struct page *src,
+			unsigned long vaddr, struct vm_area_struct *vma)
+{
+	unsigned long dst_paddr, src_paddr;
+	void *dst_vaddr = coherent_kvaddr(dst, TLBTEMP_BASE_1, vaddr,
+					  &dst_paddr);
+	void *src_vaddr = coherent_kvaddr(src, TLBTEMP_BASE_2, vaddr,
+					  &src_paddr);
+
+	preempt_disable();
+	kmap_invalidate_coherent(dst, vaddr);
+	set_bit(PG_arch_1, &dst->flags);
+	copy_page_alias(dst_vaddr, src_vaddr, dst_paddr, src_paddr);
+	preempt_enable();
+}
+EXPORT_SYMBOL(copy_user_highpage);
+
+/*
+ * Any time the kernel writes to a user page cache page, or it is about to
+ * read from a page cache page this routine is called.
+ *
+ */
+
+void flush_dcache_page(struct page *page)
+{
+	struct address_space *mapping = page_mapping_file(page);
+
+	/*
+	 * If we have a mapping but the page is not mapped to user-space
+	 * yet, we simply mark this page dirty and defer flushing the 
+	 * caches until update_mmu().
+	 */
+
+	if (mapping && !mapping_mapped(mapping)) {
+		if (!test_bit(PG_arch_1, &page->flags))
+			set_bit(PG_arch_1, &page->flags);
+		return;
+
+	} else {
+
+		unsigned long phys = page_to_phys(page);
+		unsigned long temp = page->index << PAGE_SHIFT;
+		unsigned long alias = !(DCACHE_ALIAS_EQ(temp, phys));
+		unsigned long virt;
+
+		/* 
+		 * Flush the page in kernel space and user space.
+		 * Note that we can omit that step if aliasing is not
+		 * an issue, but we do have to synchronize I$ and D$
+		 * if we have a mapping.
+		 */
+
+		if (!alias && !mapping)
+			return;
+
+		preempt_disable();
+		virt = TLBTEMP_BASE_1 + (phys & DCACHE_ALIAS_MASK);
+		__flush_invalidate_dcache_page_alias(virt, phys);
+
+		virt = TLBTEMP_BASE_1 + (temp & DCACHE_ALIAS_MASK);
+
+		if (alias)
+			__flush_invalidate_dcache_page_alias(virt, phys);
+
+		if (mapping)
+			__invalidate_icache_page_alias(virt, phys);
+		preempt_enable();
+	}
+
+	/* There shouldn't be an entry in the cache for this page anymore. */
+}
+EXPORT_SYMBOL(flush_dcache_page);
+
+/*
+ * For now, flush the whole cache. FIXME??
+ */
+
+void local_flush_cache_range(struct vm_area_struct *vma,
+		       unsigned long start, unsigned long end)
+{
+	__flush_invalidate_dcache_all();
+	__invalidate_icache_all();
+}
+EXPORT_SYMBOL(local_flush_cache_range);
+
+/* 
+ * Remove any entry in the cache for this page. 
+ *
+ * Note that this function is only called for user pages, so use the
+ * alias versions of the cache flush functions.
+ */
+
+void local_flush_cache_page(struct vm_area_struct *vma, unsigned long address,
+		      unsigned long pfn)
+{
+	/* Note that we have to use the 'alias' address to avoid multi-hit */
+
+	unsigned long phys = page_to_phys(pfn_to_page(pfn));
+	unsigned long virt = TLBTEMP_BASE_1 + (address & DCACHE_ALIAS_MASK);
+
+	preempt_disable();
+	__flush_invalidate_dcache_page_alias(virt, phys);
+	__invalidate_icache_page_alias(virt, phys);
+	preempt_enable();
+}
+EXPORT_SYMBOL(local_flush_cache_page);
+
+#endif /* DCACHE_WAY_SIZE > PAGE_SIZE */
+
+void
+update_mmu_cache(struct vm_area_struct * vma, unsigned long addr, pte_t *ptep)
+{
+	unsigned long pfn = pte_pfn(*ptep);
+	struct page *page;
+
+	if (!pfn_valid(pfn))
+		return;
+
+	page = pfn_to_page(pfn);
+
+	/* Invalidate old entry in TLBs */
+
+	flush_tlb_page(vma, addr);
+
+#if (DCACHE_WAY_SIZE > PAGE_SIZE)
+
+	if (!PageReserved(page) && test_bit(PG_arch_1, &page->flags)) {
+		unsigned long phys = page_to_phys(page);
+		unsigned long tmp;
+
+		preempt_disable();
+		tmp = TLBTEMP_BASE_1 + (phys & DCACHE_ALIAS_MASK);
+		__flush_invalidate_dcache_page_alias(tmp, phys);
+		tmp = TLBTEMP_BASE_1 + (addr & DCACHE_ALIAS_MASK);
+		__flush_invalidate_dcache_page_alias(tmp, phys);
+		__invalidate_icache_page_alias(tmp, phys);
+		preempt_enable();
+
+		clear_bit(PG_arch_1, &page->flags);
+	}
+#else
+	if (!PageReserved(page) && !test_bit(PG_arch_1, &page->flags)
+	    && (vma->vm_flags & VM_EXEC) != 0) {
+		unsigned long paddr = (unsigned long)kmap_atomic(page);
+		__flush_dcache_page(paddr);
+		__invalidate_icache_page(paddr);
+		set_bit(PG_arch_1, &page->flags);
+		kunmap_atomic((void *)paddr);
+	}
+#endif
+}
+
+/*
+ * access_process_vm() has called get_user_pages(), which has done a
+ * flush_dcache_page() on the page.
+ */
+
+#if (DCACHE_WAY_SIZE > PAGE_SIZE)
+
+void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
+		unsigned long vaddr, void *dst, const void *src,
+		unsigned long len)
+{
+	unsigned long phys = page_to_phys(page);
+	unsigned long alias = !(DCACHE_ALIAS_EQ(vaddr, phys));
+
+	/* Flush and invalidate user page if aliased. */
+
+	if (alias) {
+		unsigned long t = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK);
+		preempt_disable();
+		__flush_invalidate_dcache_page_alias(t, phys);
+		preempt_enable();
+	}
+
+	/* Copy data */
+	
+	memcpy(dst, src, len);
+
+	/*
+	 * Flush and invalidate kernel page if aliased and synchronize 
+	 * data and instruction caches for executable pages. 
+	 */
+
+	if (alias) {
+		unsigned long t = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK);
+
+		preempt_disable();
+		__flush_invalidate_dcache_range((unsigned long) dst, len);
+		if ((vma->vm_flags & VM_EXEC) != 0)
+			__invalidate_icache_page_alias(t, phys);
+		preempt_enable();
+
+	} else if ((vma->vm_flags & VM_EXEC) != 0) {
+		__flush_dcache_range((unsigned long)dst,len);
+		__invalidate_icache_range((unsigned long) dst, len);
+	}
+}
+
+extern void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
+		unsigned long vaddr, void *dst, const void *src,
+		unsigned long len)
+{
+	unsigned long phys = page_to_phys(page);
+	unsigned long alias = !(DCACHE_ALIAS_EQ(vaddr, phys));
+
+	/*
+	 * Flush user page if aliased. 
+	 * (Note: a simply flush would be sufficient) 
+	 */
+
+	if (alias) {
+		unsigned long t = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK);
+		preempt_disable();
+		__flush_invalidate_dcache_page_alias(t, phys);
+		preempt_enable();
+	}
+
+	memcpy(dst, src, len);
+}
+
+#endif
diff --git a/arch/xtensa/mm/fault.c b/arch/xtensa/mm/fault.c
new file mode 100644
index 000000000..d89b193c7
--- /dev/null
+++ b/arch/xtensa/mm/fault.c
@@ -0,0 +1,259 @@
+// TODO VM_EXEC flag work-around, cache aliasing
+/*
+ * arch/xtensa/mm/fault.c
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2010 Tensilica Inc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ * Joe Taylor	<joe@tensilica.com, joetylr@yahoo.com>
+ */
+
+#include <linux/mm.h>
+#include <linux/extable.h>
+#include <linux/hardirq.h>
+#include <linux/perf_event.h>
+#include <linux/uaccess.h>
+#include <asm/mmu_context.h>
+#include <asm/cacheflush.h>
+#include <asm/hardirq.h>
+
+void bad_page_fault(struct pt_regs*, unsigned long, int);
+
+static void vmalloc_fault(struct pt_regs *regs, unsigned int address)
+{
+#ifdef CONFIG_MMU
+	/* Synchronize this task's top level page-table
+	 * with the 'reference' page table.
+	 */
+	struct mm_struct *act_mm = current->active_mm;
+	int index = pgd_index(address);
+	pgd_t *pgd, *pgd_k;
+	p4d_t *p4d, *p4d_k;
+	pud_t *pud, *pud_k;
+	pmd_t *pmd, *pmd_k;
+	pte_t *pte_k;
+
+	if (act_mm == NULL)
+		goto bad_page_fault;
+
+	pgd = act_mm->pgd + index;
+	pgd_k = init_mm.pgd + index;
+
+	if (!pgd_present(*pgd_k))
+		goto bad_page_fault;
+
+	pgd_val(*pgd) = pgd_val(*pgd_k);
+
+	p4d = p4d_offset(pgd, address);
+	p4d_k = p4d_offset(pgd_k, address);
+	if (!p4d_present(*p4d) || !p4d_present(*p4d_k))
+		goto bad_page_fault;
+
+	pud = pud_offset(p4d, address);
+	pud_k = pud_offset(p4d_k, address);
+	if (!pud_present(*pud) || !pud_present(*pud_k))
+		goto bad_page_fault;
+
+	pmd = pmd_offset(pud, address);
+	pmd_k = pmd_offset(pud_k, address);
+	if (!pmd_present(*pmd) || !pmd_present(*pmd_k))
+		goto bad_page_fault;
+
+	pmd_val(*pmd) = pmd_val(*pmd_k);
+	pte_k = pte_offset_kernel(pmd_k, address);
+
+	if (!pte_present(*pte_k))
+		goto bad_page_fault;
+	return;
+
+bad_page_fault:
+	bad_page_fault(regs, address, SIGKILL);
+#else
+	WARN_ONCE(1, "%s in noMMU configuration\n", __func__);
+#endif
+}
+/*
+ * This routine handles page faults.  It determines the address,
+ * and the problem, and then passes it off to one of the appropriate
+ * routines.
+ *
+ * Note: does not handle Miss and MultiHit.
+ */
+
+void do_page_fault(struct pt_regs *regs)
+{
+	struct vm_area_struct * vma;
+	struct mm_struct *mm = current->mm;
+	unsigned int exccause = regs->exccause;
+	unsigned int address = regs->excvaddr;
+	int code;
+
+	int is_write, is_exec;
+	vm_fault_t fault;
+	unsigned int flags = FAULT_FLAG_DEFAULT;
+
+	code = SEGV_MAPERR;
+
+	/* We fault-in kernel-space virtual memory on-demand. The
+	 * 'reference' page table is init_mm.pgd.
+	 */
+	if (address >= TASK_SIZE && !user_mode(regs)) {
+		vmalloc_fault(regs, address);
+		return;
+	}
+
+	/* If we're in an interrupt or have no user
+	 * context, we must not take the fault..
+	 */
+	if (faulthandler_disabled() || !mm) {
+		bad_page_fault(regs, address, SIGSEGV);
+		return;
+	}
+
+	is_write = (exccause == EXCCAUSE_STORE_CACHE_ATTRIBUTE) ? 1 : 0;
+	is_exec =  (exccause == EXCCAUSE_ITLB_PRIVILEGE ||
+		    exccause == EXCCAUSE_ITLB_MISS ||
+		    exccause == EXCCAUSE_FETCH_CACHE_ATTRIBUTE) ? 1 : 0;
+
+	pr_debug("[%s:%d:%08x:%d:%08lx:%s%s]\n",
+		 current->comm, current->pid,
+		 address, exccause, regs->pc,
+		 is_write ? "w" : "", is_exec ? "x" : "");
+
+	if (user_mode(regs))
+		flags |= FAULT_FLAG_USER;
+
+	perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
+
+retry:
+	vma = lock_mm_and_find_vma(mm, address, regs);
+	if (!vma)
+		goto bad_area_nosemaphore;
+
+	/* Ok, we have a good vm_area for this memory access, so
+	 * we can handle it..
+	 */
+
+	code = SEGV_ACCERR;
+
+	if (is_write) {
+		if (!(vma->vm_flags & VM_WRITE))
+			goto bad_area;
+		flags |= FAULT_FLAG_WRITE;
+	} else if (is_exec) {
+		if (!(vma->vm_flags & VM_EXEC))
+			goto bad_area;
+	} else	/* Allow read even from write-only pages. */
+		if (!(vma->vm_flags & (VM_READ | VM_WRITE)))
+			goto bad_area;
+
+	/* If for any reason at all we couldn't handle the fault,
+	 * make sure we exit gracefully rather than endlessly redo
+	 * the fault.
+	 */
+	fault = handle_mm_fault(vma, address, flags, regs);
+
+	if (fault_signal_pending(fault, regs)) {
+		if (!user_mode(regs))
+			bad_page_fault(regs, address, SIGKILL);
+		return;
+	}
+
+	/* The fault is fully completed (including releasing mmap lock) */
+	if (fault & VM_FAULT_COMPLETED)
+		return;
+
+	if (unlikely(fault & VM_FAULT_ERROR)) {
+		if (fault & VM_FAULT_OOM)
+			goto out_of_memory;
+		else if (fault & VM_FAULT_SIGSEGV)
+			goto bad_area;
+		else if (fault & VM_FAULT_SIGBUS)
+			goto do_sigbus;
+		BUG();
+	}
+
+	if (fault & VM_FAULT_RETRY) {
+		flags |= FAULT_FLAG_TRIED;
+
+		/* No need to mmap_read_unlock(mm) as we would
+		 * have already released it in __lock_page_or_retry
+		 * in mm/filemap.c.
+		 */
+
+		goto retry;
+	}
+
+	mmap_read_unlock(mm);
+	return;
+
+	/* Something tried to access memory that isn't in our memory map..
+	 * Fix it, but check if it's kernel or user first..
+	 */
+bad_area:
+	mmap_read_unlock(mm);
+bad_area_nosemaphore:
+	if (user_mode(regs)) {
+		current->thread.bad_vaddr = address;
+		current->thread.error_code = is_write;
+		force_sig_fault(SIGSEGV, code, (void *) address);
+		return;
+	}
+	bad_page_fault(regs, address, SIGSEGV);
+	return;
+
+
+	/* We ran out of memory, or some other thing happened to us that made
+	 * us unable to handle the page fault gracefully.
+	 */
+out_of_memory:
+	mmap_read_unlock(mm);
+	if (!user_mode(regs))
+		bad_page_fault(regs, address, SIGKILL);
+	else
+		pagefault_out_of_memory();
+	return;
+
+do_sigbus:
+	mmap_read_unlock(mm);
+
+	/* Send a sigbus, regardless of whether we were in kernel
+	 * or user mode.
+	 */
+	current->thread.bad_vaddr = address;
+	force_sig_fault(SIGBUS, BUS_ADRERR, (void *) address);
+
+	/* Kernel mode? Handle exceptions or die */
+	if (!user_mode(regs))
+		bad_page_fault(regs, address, SIGBUS);
+	return;
+}
+
+
+void
+bad_page_fault(struct pt_regs *regs, unsigned long address, int sig)
+{
+	extern void __noreturn die(const char*, struct pt_regs*, long);
+	const struct exception_table_entry *entry;
+
+	/* Are we prepared to handle this kernel fault?  */
+	if ((entry = search_exception_tables(regs->pc)) != NULL) {
+		pr_debug("%s: Exception at pc=%#010lx (%lx)\n",
+			 current->comm, regs->pc, entry->fixup);
+		current->thread.bad_uaddr = address;
+		regs->pc = entry->fixup;
+		return;
+	}
+
+	/* Oops. The kernel tried to access some bad page. We'll have to
+	 * terminate things with extreme prejudice.
+	 */
+	pr_alert("Unable to handle kernel paging request at virtual "
+		 "address %08lx\n pc = %08lx, ra = %08lx\n",
+		 address, regs->pc, regs->areg[0]);
+	die("Oops", regs, sig);
+}
diff --git a/arch/xtensa/mm/highmem.c b/arch/xtensa/mm/highmem.c
new file mode 100644
index 000000000..35c4f7d4a
--- /dev/null
+++ b/arch/xtensa/mm/highmem.c
@@ -0,0 +1,59 @@
+/*
+ * High memory support for Xtensa architecture
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ *
+ * Copyright (C) 2014 Cadence Design Systems Inc.
+ */
+
+#include <linux/export.h>
+#include <linux/highmem.h>
+#include <asm/tlbflush.h>
+
+#if DCACHE_WAY_SIZE > PAGE_SIZE
+unsigned int last_pkmap_nr_arr[DCACHE_N_COLORS];
+wait_queue_head_t pkmap_map_wait_arr[DCACHE_N_COLORS];
+
+static void __init kmap_waitqueues_init(void)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(pkmap_map_wait_arr); ++i)
+		init_waitqueue_head(pkmap_map_wait_arr + i);
+}
+
+static inline enum fixed_addresses kmap_idx(int type, unsigned long color)
+{
+	int idx = (type + KM_MAX_IDX * smp_processor_id()) * DCACHE_N_COLORS;
+
+	/*
+	 * The fixmap operates top down, so the color offset needs to be
+	 * reverse as well.
+	 */
+	return idx + DCACHE_N_COLORS - 1 - color;
+}
+
+enum fixed_addresses kmap_local_map_idx(int type, unsigned long pfn)
+{
+	return kmap_idx(type, DCACHE_ALIAS(pfn << PAGE_SHIFT));
+}
+
+enum fixed_addresses kmap_local_unmap_idx(int type, unsigned long addr)
+{
+	return kmap_idx(type, DCACHE_ALIAS(addr));
+}
+
+#else
+static inline void kmap_waitqueues_init(void) { }
+#endif
+
+void __init kmap_init(void)
+{
+	/* Check if this memory layout is broken because PKMAP overlaps
+	 * page table.
+	 */
+	BUILD_BUG_ON(PKMAP_BASE < TLBTEMP_BASE_1 + TLBTEMP_SIZE);
+	kmap_waitqueues_init();
+}
diff --git a/arch/xtensa/mm/init.c b/arch/xtensa/mm/init.c
new file mode 100644
index 000000000..b2587a1a7
--- /dev/null
+++ b/arch/xtensa/mm/init.c
@@ -0,0 +1,240 @@
+/*
+ * arch/xtensa/mm/init.c
+ *
+ * Derived from MIPS, PPC.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ * Copyright (C) 2014 - 2016 Cadence Design Systems Inc.
+ *
+ * Chris Zankel	<chris@zankel.net>
+ * Joe Taylor	<joe@tensilica.com, joetylr@yahoo.com>
+ * Marc Gauthier
+ * Kevin Chea
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/memblock.h>
+#include <linux/gfp.h>
+#include <linux/highmem.h>
+#include <linux/swap.h>
+#include <linux/mman.h>
+#include <linux/nodemask.h>
+#include <linux/mm.h>
+#include <linux/of_fdt.h>
+#include <linux/dma-map-ops.h>
+
+#include <asm/bootparam.h>
+#include <asm/page.h>
+#include <asm/sections.h>
+#include <asm/sysmem.h>
+
+/*
+ * Initialize the bootmem system and give it all low memory we have available.
+ */
+
+void __init bootmem_init(void)
+{
+	/* Reserve all memory below PHYS_OFFSET, as memory
+	 * accounting doesn't work for pages below that address.
+	 *
+	 * If PHYS_OFFSET is zero reserve page at address 0:
+	 * successfull allocations should never return NULL.
+	 */
+	memblock_reserve(0, PHYS_OFFSET ? PHYS_OFFSET : 1);
+
+	early_init_fdt_scan_reserved_mem();
+
+	if (!memblock_phys_mem_size())
+		panic("No memory found!\n");
+
+	min_low_pfn = PFN_UP(memblock_start_of_DRAM());
+	min_low_pfn = max(min_low_pfn, PFN_UP(PHYS_OFFSET));
+	max_pfn = PFN_DOWN(memblock_end_of_DRAM());
+	max_low_pfn = min(max_pfn, MAX_LOW_PFN);
+
+	early_memtest((phys_addr_t)min_low_pfn << PAGE_SHIFT,
+		      (phys_addr_t)max_low_pfn << PAGE_SHIFT);
+
+	memblock_set_current_limit(PFN_PHYS(max_low_pfn));
+	dma_contiguous_reserve(PFN_PHYS(max_low_pfn));
+
+	memblock_dump_all();
+}
+
+
+void __init zones_init(void)
+{
+	/* All pages are DMA-able, so we put them all in the DMA zone. */
+	unsigned long max_zone_pfn[MAX_NR_ZONES] = {
+		[ZONE_NORMAL] = max_low_pfn,
+#ifdef CONFIG_HIGHMEM
+		[ZONE_HIGHMEM] = max_pfn,
+#endif
+	};
+	free_area_init(max_zone_pfn);
+}
+
+static void __init free_highpages(void)
+{
+#ifdef CONFIG_HIGHMEM
+	unsigned long max_low = max_low_pfn;
+	phys_addr_t range_start, range_end;
+	u64 i;
+
+	/* set highmem page free */
+	for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE,
+				&range_start, &range_end, NULL) {
+		unsigned long start = PFN_UP(range_start);
+		unsigned long end = PFN_DOWN(range_end);
+
+		/* Ignore complete lowmem entries */
+		if (end <= max_low)
+			continue;
+
+		/* Truncate partial highmem entries */
+		if (start < max_low)
+			start = max_low;
+
+		for (; start < end; start++)
+			free_highmem_page(pfn_to_page(start));
+	}
+#endif
+}
+
+/*
+ * Initialize memory pages.
+ */
+
+void __init mem_init(void)
+{
+	free_highpages();
+
+	max_mapnr = max_pfn - ARCH_PFN_OFFSET;
+	high_memory = (void *)__va(max_low_pfn << PAGE_SHIFT);
+
+	memblock_free_all();
+
+	pr_info("virtual kernel memory layout:\n"
+#ifdef CONFIG_KASAN
+		"    kasan   : 0x%08lx - 0x%08lx  (%5lu MB)\n"
+#endif
+#ifdef CONFIG_MMU
+		"    vmalloc : 0x%08lx - 0x%08lx  (%5lu MB)\n"
+#endif
+#ifdef CONFIG_HIGHMEM
+		"    pkmap   : 0x%08lx - 0x%08lx  (%5lu kB)\n"
+		"    fixmap  : 0x%08lx - 0x%08lx  (%5lu kB)\n"
+#endif
+		"    lowmem  : 0x%08lx - 0x%08lx  (%5lu MB)\n"
+		"    .text   : 0x%08lx - 0x%08lx  (%5lu kB)\n"
+		"    .rodata : 0x%08lx - 0x%08lx  (%5lu kB)\n"
+		"    .data   : 0x%08lx - 0x%08lx  (%5lu kB)\n"
+		"    .init   : 0x%08lx - 0x%08lx  (%5lu kB)\n"
+		"    .bss    : 0x%08lx - 0x%08lx  (%5lu kB)\n",
+#ifdef CONFIG_KASAN
+		KASAN_SHADOW_START, KASAN_SHADOW_START + KASAN_SHADOW_SIZE,
+		KASAN_SHADOW_SIZE >> 20,
+#endif
+#ifdef CONFIG_MMU
+		VMALLOC_START, VMALLOC_END,
+		(VMALLOC_END - VMALLOC_START) >> 20,
+#ifdef CONFIG_HIGHMEM
+		PKMAP_BASE, PKMAP_BASE + LAST_PKMAP * PAGE_SIZE,
+		(LAST_PKMAP*PAGE_SIZE) >> 10,
+		FIXADDR_START, FIXADDR_END,
+		(FIXADDR_END - FIXADDR_START) >> 10,
+#endif
+		PAGE_OFFSET, PAGE_OFFSET +
+		(max_low_pfn - min_low_pfn) * PAGE_SIZE,
+#else
+		min_low_pfn * PAGE_SIZE, max_low_pfn * PAGE_SIZE,
+#endif
+		((max_low_pfn - min_low_pfn) * PAGE_SIZE) >> 20,
+		(unsigned long)_text, (unsigned long)_etext,
+		(unsigned long)(_etext - _text) >> 10,
+		(unsigned long)__start_rodata, (unsigned long)__end_rodata,
+		(unsigned long)(__end_rodata - __start_rodata) >> 10,
+		(unsigned long)_sdata, (unsigned long)_edata,
+		(unsigned long)(_edata - _sdata) >> 10,
+		(unsigned long)__init_begin, (unsigned long)__init_end,
+		(unsigned long)(__init_end - __init_begin) >> 10,
+		(unsigned long)__bss_start, (unsigned long)__bss_stop,
+		(unsigned long)(__bss_stop - __bss_start) >> 10);
+}
+
+static void __init parse_memmap_one(char *p)
+{
+	char *oldp;
+	unsigned long start_at, mem_size;
+
+	if (!p)
+		return;
+
+	oldp = p;
+	mem_size = memparse(p, &p);
+	if (p == oldp)
+		return;
+
+	switch (*p) {
+	case '@':
+		start_at = memparse(p + 1, &p);
+		memblock_add(start_at, mem_size);
+		break;
+
+	case '$':
+		start_at = memparse(p + 1, &p);
+		memblock_reserve(start_at, mem_size);
+		break;
+
+	case 0:
+		memblock_reserve(mem_size, -mem_size);
+		break;
+
+	default:
+		pr_warn("Unrecognized memmap syntax: %s\n", p);
+		break;
+	}
+}
+
+static int __init parse_memmap_opt(char *str)
+{
+	while (str) {
+		char *k = strchr(str, ',');
+
+		if (k)
+			*k++ = 0;
+
+		parse_memmap_one(str);
+		str = k;
+	}
+
+	return 0;
+}
+early_param("memmap", parse_memmap_opt);
+
+#ifdef CONFIG_MMU
+static const pgprot_t protection_map[16] = {
+	[VM_NONE]					= PAGE_NONE,
+	[VM_READ]					= PAGE_READONLY,
+	[VM_WRITE]					= PAGE_COPY,
+	[VM_WRITE | VM_READ]				= PAGE_COPY,
+	[VM_EXEC]					= PAGE_READONLY_EXEC,
+	[VM_EXEC | VM_READ]				= PAGE_READONLY_EXEC,
+	[VM_EXEC | VM_WRITE]				= PAGE_COPY_EXEC,
+	[VM_EXEC | VM_WRITE | VM_READ]			= PAGE_COPY_EXEC,
+	[VM_SHARED]					= PAGE_NONE,
+	[VM_SHARED | VM_READ]				= PAGE_READONLY,
+	[VM_SHARED | VM_WRITE]				= PAGE_SHARED,
+	[VM_SHARED | VM_WRITE | VM_READ]		= PAGE_SHARED,
+	[VM_SHARED | VM_EXEC]				= PAGE_READONLY_EXEC,
+	[VM_SHARED | VM_EXEC | VM_READ]			= PAGE_READONLY_EXEC,
+	[VM_SHARED | VM_EXEC | VM_WRITE]		= PAGE_SHARED_EXEC,
+	[VM_SHARED | VM_EXEC | VM_WRITE | VM_READ]	= PAGE_SHARED_EXEC
+};
+DECLARE_VM_GET_PAGE_PROT
+#endif
diff --git a/arch/xtensa/mm/ioremap.c b/arch/xtensa/mm/ioremap.c
new file mode 100644
index 000000000..a400188c1
--- /dev/null
+++ b/arch/xtensa/mm/ioremap.c
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ioremap implementation.
+ *
+ * Copyright (C) 2015 Cadence Design Systems Inc.
+ */
+
+#include <linux/io.h>
+#include <linux/vmalloc.h>
+#include <linux/pgtable.h>
+#include <asm/cacheflush.h>
+#include <asm/io.h>
+
+static void __iomem *xtensa_ioremap(unsigned long paddr, unsigned long size,
+				    pgprot_t prot)
+{
+	unsigned long offset = paddr & ~PAGE_MASK;
+	unsigned long pfn = __phys_to_pfn(paddr);
+	struct vm_struct *area;
+	unsigned long vaddr;
+	int err;
+
+	paddr &= PAGE_MASK;
+
+	WARN_ON(pfn_valid(pfn));
+
+	size = PAGE_ALIGN(offset + size);
+
+	area = get_vm_area(size, VM_IOREMAP);
+	if (!area)
+		return NULL;
+
+	vaddr = (unsigned long)area->addr;
+	area->phys_addr = paddr;
+
+	err = ioremap_page_range(vaddr, vaddr + size, paddr, prot);
+
+	if (err) {
+		vunmap((void *)vaddr);
+		return NULL;
+	}
+
+	flush_cache_vmap(vaddr, vaddr + size);
+	return (void __iomem *)(offset + vaddr);
+}
+
+void __iomem *xtensa_ioremap_nocache(unsigned long addr, unsigned long size)
+{
+	return xtensa_ioremap(addr, size, pgprot_noncached(PAGE_KERNEL));
+}
+EXPORT_SYMBOL(xtensa_ioremap_nocache);
+
+void __iomem *xtensa_ioremap_cache(unsigned long addr, unsigned long size)
+{
+	return xtensa_ioremap(addr, size, PAGE_KERNEL);
+}
+EXPORT_SYMBOL(xtensa_ioremap_cache);
+
+void xtensa_iounmap(volatile void __iomem *io_addr)
+{
+	void *addr = (void *)(PAGE_MASK & (unsigned long)io_addr);
+
+	vunmap(addr);
+}
+EXPORT_SYMBOL(xtensa_iounmap);
diff --git a/arch/xtensa/mm/kasan_init.c b/arch/xtensa/mm/kasan_init.c
new file mode 100644
index 000000000..1fef24db2
--- /dev/null
+++ b/arch/xtensa/mm/kasan_init.c
@@ -0,0 +1,104 @@
+/*
+ * Xtensa KASAN shadow map initialization
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2017 Cadence Design Systems Inc.
+ */
+
+#include <linux/memblock.h>
+#include <linux/init_task.h>
+#include <linux/kasan.h>
+#include <linux/kernel.h>
+#include <asm/initialize_mmu.h>
+#include <asm/tlbflush.h>
+#include <asm/traps.h>
+
+void __init kasan_early_init(void)
+{
+	unsigned long vaddr = KASAN_SHADOW_START;
+	pmd_t *pmd = pmd_off_k(vaddr);
+	int i;
+
+	for (i = 0; i < PTRS_PER_PTE; ++i)
+		set_pte(kasan_early_shadow_pte + i,
+			mk_pte(virt_to_page(kasan_early_shadow_page),
+				PAGE_KERNEL));
+
+	for (vaddr = 0; vaddr < KASAN_SHADOW_SIZE; vaddr += PMD_SIZE, ++pmd) {
+		BUG_ON(!pmd_none(*pmd));
+		set_pmd(pmd, __pmd((unsigned long)kasan_early_shadow_pte));
+	}
+	early_trap_init();
+}
+
+static void __init populate(void *start, void *end)
+{
+	unsigned long n_pages = (end - start) / PAGE_SIZE;
+	unsigned long n_pmds = n_pages / PTRS_PER_PTE;
+	unsigned long i, j;
+	unsigned long vaddr = (unsigned long)start;
+	pmd_t *pmd = pmd_off_k(vaddr);
+	pte_t *pte = memblock_alloc(n_pages * sizeof(pte_t), PAGE_SIZE);
+
+	if (!pte)
+		panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
+		      __func__, n_pages * sizeof(pte_t), PAGE_SIZE);
+
+	pr_debug("%s: %p - %p\n", __func__, start, end);
+
+	for (i = j = 0; i < n_pmds; ++i) {
+		int k;
+
+		for (k = 0; k < PTRS_PER_PTE; ++k, ++j) {
+			phys_addr_t phys =
+				memblock_phys_alloc_range(PAGE_SIZE, PAGE_SIZE,
+							  0,
+							  MEMBLOCK_ALLOC_ANYWHERE);
+
+			if (!phys)
+				panic("Failed to allocate page table page\n");
+
+			set_pte(pte + j, pfn_pte(PHYS_PFN(phys), PAGE_KERNEL));
+		}
+	}
+
+	for (i = 0; i < n_pmds ; ++i, pte += PTRS_PER_PTE)
+		set_pmd(pmd + i, __pmd((unsigned long)pte));
+
+	local_flush_tlb_all();
+	memset(start, 0, end - start);
+}
+
+void __init kasan_init(void)
+{
+	int i;
+
+	BUILD_BUG_ON(KASAN_SHADOW_OFFSET != KASAN_SHADOW_START -
+		     (KASAN_START_VADDR >> KASAN_SHADOW_SCALE_SHIFT));
+	BUILD_BUG_ON(VMALLOC_START < KASAN_START_VADDR);
+
+	/*
+	 * Replace shadow map pages that cover addresses from VMALLOC area
+	 * start to the end of KSEG with clean writable pages.
+	 */
+	populate(kasan_mem_to_shadow((void *)VMALLOC_START),
+		 kasan_mem_to_shadow((void *)XCHAL_KSEG_BYPASS_VADDR));
+
+	/*
+	 * Write protect kasan_early_shadow_page and zero-initialize it again.
+	 */
+	for (i = 0; i < PTRS_PER_PTE; ++i)
+		set_pte(kasan_early_shadow_pte + i,
+			mk_pte(virt_to_page(kasan_early_shadow_page),
+				PAGE_KERNEL_RO));
+
+	local_flush_tlb_all();
+	memset(kasan_early_shadow_page, 0, PAGE_SIZE);
+
+	/* At this point kasan is fully initialized. Enable error messages. */
+	current->kasan_depth = 0;
+	pr_info("KernelAddressSanitizer initialized\n");
+}
diff --git a/arch/xtensa/mm/misc.S b/arch/xtensa/mm/misc.S
new file mode 100644
index 000000000..0527bf6e3
--- /dev/null
+++ b/arch/xtensa/mm/misc.S
@@ -0,0 +1,458 @@
+/*
+ * arch/xtensa/mm/misc.S
+ *
+ * Miscellaneous assembly functions.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2007 Tensilica Inc.
+ *
+ * Chris Zankel	<chris@zankel.net>
+ */
+
+
+#include <linux/linkage.h>
+#include <linux/pgtable.h>
+#include <asm/page.h>
+#include <asm/asmmacro.h>
+#include <asm/cacheasm.h>
+#include <asm/tlbflush.h>
+
+
+/*
+ * clear_page and clear_user_page are the same for non-cache-aliased configs.
+ *
+ * clear_page (unsigned long page)
+ *                    a2
+ */
+
+ENTRY(clear_page)
+
+	abi_entry_default
+
+	movi	a3, 0
+	__loopi	a2, a7, PAGE_SIZE, 32
+	s32i	a3, a2, 0
+	s32i	a3, a2, 4
+	s32i	a3, a2, 8
+	s32i	a3, a2, 12
+	s32i	a3, a2, 16
+	s32i	a3, a2, 20
+	s32i	a3, a2, 24
+	s32i	a3, a2, 28
+	__endla	a2, a7, 32
+
+	abi_ret_default
+
+ENDPROC(clear_page)
+
+/*
+ * copy_page and copy_user_page are the same for non-cache-aliased configs.
+ *
+ * copy_page (void *to, void *from)
+ *               a2          a3
+ */
+
+ENTRY(copy_page)
+
+	abi_entry_default
+
+	__loopi a2, a4, PAGE_SIZE, 32
+
+	l32i    a8, a3, 0
+	l32i    a9, a3, 4
+	s32i    a8, a2, 0
+	s32i    a9, a2, 4
+
+	l32i    a8, a3, 8
+	l32i    a9, a3, 12
+	s32i    a8, a2, 8
+	s32i    a9, a2, 12
+
+	l32i    a8, a3, 16
+	l32i    a9, a3, 20
+	s32i    a8, a2, 16
+	s32i    a9, a2, 20
+
+	l32i    a8, a3, 24
+	l32i    a9, a3, 28
+	s32i    a8, a2, 24
+	s32i    a9, a2, 28
+
+	addi    a2, a2, 32
+	addi    a3, a3, 32
+
+	__endl  a2, a4
+
+	abi_ret_default
+
+ENDPROC(copy_page)
+
+#ifdef CONFIG_MMU
+/*
+ * If we have to deal with cache aliasing, we use temporary memory mappings
+ * to ensure that the source and destination pages have the same color as
+ * the virtual address. We use way 0 and 1 for temporary mappings in such cases.
+ *
+ * The temporary DTLB entries shouldn't be flushed by interrupts, but are
+ * flushed by preemptive task switches. Special code in the 
+ * fast_second_level_miss handler re-established the temporary mapping. 
+ * It requires that the PPNs for the destination and source addresses are
+ * in a6, and a7, respectively.
+ */
+
+/* TLB miss exceptions are treated special in the following region */
+
+ENTRY(__tlbtemp_mapping_start)
+
+#if (DCACHE_WAY_SIZE > PAGE_SIZE)
+
+/*
+ * clear_page_alias(void *addr, unsigned long paddr)
+ *                     a2              a3
+ */
+
+ENTRY(clear_page_alias)
+
+	abi_entry_default
+
+	movi	a5, PAGE_OFFSET
+	addi	a6, a3, (PAGE_KERNEL | _PAGE_HW_WRITE)
+	mov	a4, a2
+	wdtlb	a6, a2
+	dsync
+
+	movi	a3, 0
+	__loopi	a2, a7, PAGE_SIZE, 32
+	s32i	a3, a2, 0
+	s32i	a3, a2, 4
+	s32i	a3, a2, 8
+	s32i	a3, a2, 12
+	s32i	a3, a2, 16
+	s32i	a3, a2, 20
+	s32i	a3, a2, 24
+	s32i	a3, a2, 28
+	__endla	a2, a7, 32
+
+	/* We need to invalidate the temporary dtlb entry. */
+
+	idtlb	a4
+	dsync
+
+	abi_ret_default
+
+ENDPROC(clear_page_alias)
+
+/*
+ * copy_page_alias(void *to, void *from,
+ *			a2	  a3
+ *                 unsigned long to_paddr, unsigned long from_paddr)
+ *	        		 a4			 a5
+ */
+
+ENTRY(copy_page_alias)
+
+	abi_entry_default
+
+	/* Setup a temporary DTLB for destination. */
+
+	addi	a6, a4, (PAGE_KERNEL | _PAGE_HW_WRITE)
+	wdtlb	a6, a2
+	dsync
+
+	/* Setup a temporary DTLB for source. */
+
+	addi	a7, a5, PAGE_KERNEL
+	addi	a8, a3, 1				# way1
+
+	wdtlb	a7, a8
+	dsync
+
+1:	__loopi a2, a4, PAGE_SIZE, 32
+
+	l32i    a8, a3, 0
+	l32i    a9, a3, 4
+	s32i    a8, a2, 0
+	s32i    a9, a2, 4
+
+	l32i    a8, a3, 8
+	l32i    a9, a3, 12
+	s32i    a8, a2, 8
+	s32i    a9, a2, 12
+
+	l32i    a8, a3, 16
+	l32i    a9, a3, 20
+	s32i    a8, a2, 16
+	s32i    a9, a2, 20
+
+	l32i    a8, a3, 24
+	l32i    a9, a3, 28
+	s32i    a8, a2, 24
+	s32i    a9, a2, 28
+
+	addi    a2, a2, 32
+	addi    a3, a3, 32
+
+	__endl  a2, a4
+
+	/* We need to invalidate any temporary mapping! */
+
+	addi	a2, a2, -PAGE_SIZE
+	idtlb	a2
+	dsync
+
+	addi	a3, a3, -PAGE_SIZE+1
+	idtlb	a3
+	dsync
+
+	abi_ret_default
+
+ENDPROC(copy_page_alias)
+
+#endif
+
+#if (DCACHE_WAY_SIZE > PAGE_SIZE)
+
+/*
+ * void __flush_invalidate_dcache_page_alias (addr, phys)
+ *                                             a2    a3
+ */
+
+ENTRY(__flush_invalidate_dcache_page_alias)
+
+	abi_entry_default
+
+	movi	a7, 0			# required for exception handler
+	addi	a6, a3, (PAGE_KERNEL | _PAGE_HW_WRITE)
+	mov	a4, a2
+	wdtlb	a6, a2
+	dsync
+
+	___flush_invalidate_dcache_page a2 a3
+
+	idtlb	a4
+	dsync
+
+	abi_ret_default
+
+ENDPROC(__flush_invalidate_dcache_page_alias)
+
+/*
+ * void __invalidate_dcache_page_alias (addr, phys)
+ *                                       a2    a3
+ */
+
+ENTRY(__invalidate_dcache_page_alias)
+
+	abi_entry_default
+
+	movi	a7, 0			# required for exception handler
+	addi	a6, a3, (PAGE_KERNEL | _PAGE_HW_WRITE)
+	mov	a4, a2
+	wdtlb	a6, a2
+	dsync
+
+	___invalidate_dcache_page a2 a3
+
+	idtlb	a4
+	dsync
+
+	abi_ret_default
+
+ENDPROC(__invalidate_dcache_page_alias)
+#endif
+
+ENTRY(__tlbtemp_mapping_itlb)
+
+#if (ICACHE_WAY_SIZE > PAGE_SIZE)
+	
+ENTRY(__invalidate_icache_page_alias)
+
+	abi_entry_default
+
+	addi	a6, a3, (PAGE_KERNEL_EXEC | _PAGE_HW_WRITE)
+	mov	a4, a2
+	witlb	a6, a2
+	isync
+
+	___invalidate_icache_page a2 a3
+
+	iitlb	a4
+	isync
+	abi_ret_default
+
+ENDPROC(__invalidate_icache_page_alias)
+
+#endif
+
+/* End of special treatment in tlb miss exception */
+
+ENTRY(__tlbtemp_mapping_end)
+
+#endif /* CONFIG_MMU
+
+/*
+ * void __invalidate_icache_page(ulong start)
+ */
+
+ENTRY(__invalidate_icache_page)
+
+	abi_entry_default
+
+	___invalidate_icache_page a2 a3
+	isync
+
+	abi_ret_default
+
+ENDPROC(__invalidate_icache_page)
+
+/*
+ * void __invalidate_dcache_page(ulong start)
+ */
+
+ENTRY(__invalidate_dcache_page)
+
+	abi_entry_default
+
+	___invalidate_dcache_page a2 a3
+	dsync
+
+	abi_ret_default
+
+ENDPROC(__invalidate_dcache_page)
+
+/*
+ * void __flush_invalidate_dcache_page(ulong start)
+ */
+
+ENTRY(__flush_invalidate_dcache_page)
+
+	abi_entry_default
+
+	___flush_invalidate_dcache_page a2 a3
+
+	dsync
+	abi_ret_default
+
+ENDPROC(__flush_invalidate_dcache_page)
+
+/*
+ * void __flush_dcache_page(ulong start)
+ */
+
+ENTRY(__flush_dcache_page)
+
+	abi_entry_default
+
+	___flush_dcache_page a2 a3
+
+	dsync
+	abi_ret_default
+
+ENDPROC(__flush_dcache_page)
+
+/*
+ * void __invalidate_icache_range(ulong start, ulong size)
+ */
+
+ENTRY(__invalidate_icache_range)
+
+	abi_entry_default
+
+	___invalidate_icache_range a2 a3 a4
+	isync
+
+	abi_ret_default
+
+ENDPROC(__invalidate_icache_range)
+
+/*
+ * void __flush_invalidate_dcache_range(ulong start, ulong size)
+ */
+
+ENTRY(__flush_invalidate_dcache_range)
+
+	abi_entry_default
+
+	___flush_invalidate_dcache_range a2 a3 a4
+	dsync
+
+	abi_ret_default
+
+ENDPROC(__flush_invalidate_dcache_range)
+
+/*
+ * void _flush_dcache_range(ulong start, ulong size)
+ */
+
+ENTRY(__flush_dcache_range)
+
+	abi_entry_default
+
+	___flush_dcache_range a2 a3 a4
+	dsync
+
+	abi_ret_default
+
+ENDPROC(__flush_dcache_range)
+
+/*
+ * void _invalidate_dcache_range(ulong start, ulong size)
+ */
+
+ENTRY(__invalidate_dcache_range)
+
+	abi_entry_default
+
+	___invalidate_dcache_range a2 a3 a4
+
+	abi_ret_default
+
+ENDPROC(__invalidate_dcache_range)
+
+/*
+ * void _invalidate_icache_all(void)
+ */
+
+ENTRY(__invalidate_icache_all)
+
+	abi_entry_default
+
+	___invalidate_icache_all a2 a3
+	isync
+
+	abi_ret_default
+
+ENDPROC(__invalidate_icache_all)
+
+/*
+ * void _flush_invalidate_dcache_all(void)
+ */
+
+ENTRY(__flush_invalidate_dcache_all)
+
+	abi_entry_default
+
+	___flush_invalidate_dcache_all a2 a3
+	dsync
+
+	abi_ret_default
+
+ENDPROC(__flush_invalidate_dcache_all)
+
+/*
+ * void _invalidate_dcache_all(void)
+ */
+
+ENTRY(__invalidate_dcache_all)
+
+	abi_entry_default
+
+	___invalidate_dcache_all a2 a3
+	dsync
+
+	abi_ret_default
+
+ENDPROC(__invalidate_dcache_all)
diff --git a/arch/xtensa/mm/mmu.c b/arch/xtensa/mm/mmu.c
new file mode 100644
index 000000000..92e158c69
--- /dev/null
+++ b/arch/xtensa/mm/mmu.c
@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * xtensa mmu stuff
+ *
+ * Extracted from init.c
+ */
+#include <linux/memblock.h>
+#include <linux/percpu.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/cache.h>
+
+#include <asm/tlb.h>
+#include <asm/tlbflush.h>
+#include <asm/mmu_context.h>
+#include <asm/page.h>
+#include <asm/initialize_mmu.h>
+#include <asm/io.h>
+
+DEFINE_PER_CPU(unsigned long, asid_cache) = ASID_USER_FIRST;
+
+#if defined(CONFIG_HIGHMEM)
+static void * __init init_pmd(unsigned long vaddr, unsigned long n_pages)
+{
+	pmd_t *pmd = pmd_off_k(vaddr);
+	pte_t *pte;
+	unsigned long i;
+
+	n_pages = ALIGN(n_pages, PTRS_PER_PTE);
+
+	pr_debug("%s: vaddr: 0x%08lx, n_pages: %ld\n",
+		 __func__, vaddr, n_pages);
+
+	pte = memblock_alloc_low(n_pages * sizeof(pte_t), PAGE_SIZE);
+	if (!pte)
+		panic("%s: Failed to allocate %lu bytes align=%lx\n",
+		      __func__, n_pages * sizeof(pte_t), PAGE_SIZE);
+
+	for (i = 0; i < n_pages; ++i)
+		pte_clear(NULL, 0, pte + i);
+
+	for (i = 0; i < n_pages; i += PTRS_PER_PTE, ++pmd) {
+		pte_t *cur_pte = pte + i;
+
+		BUG_ON(!pmd_none(*pmd));
+		set_pmd(pmd, __pmd(((unsigned long)cur_pte) & PAGE_MASK));
+		BUG_ON(cur_pte != pte_offset_kernel(pmd, 0));
+		pr_debug("%s: pmd: 0x%p, pte: 0x%p\n",
+			 __func__, pmd, cur_pte);
+	}
+	return pte;
+}
+
+static void __init fixedrange_init(void)
+{
+	BUILD_BUG_ON(FIXADDR_START < TLBTEMP_BASE_1 + TLBTEMP_SIZE);
+	init_pmd(FIXADDR_START, __end_of_fixed_addresses);
+}
+#endif
+
+void __init paging_init(void)
+{
+#ifdef CONFIG_HIGHMEM
+	fixedrange_init();
+	pkmap_page_table = init_pmd(PKMAP_BASE, LAST_PKMAP);
+	kmap_init();
+#endif
+}
+
+/*
+ * Flush the mmu and reset associated register to default values.
+ */
+void init_mmu(void)
+{
+#if !(XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY)
+	/*
+	 * Writing zeros to the instruction and data TLBCFG special
+	 * registers ensure that valid values exist in the register.
+	 *
+	 * For existing PGSZID<w> fields, zero selects the first element
+	 * of the page-size array.  For nonexistent PGSZID<w> fields,
+	 * zero is the best value to write.  Also, when changing PGSZID<w>
+	 * fields, the corresponding TLB must be flushed.
+	 */
+	set_itlbcfg_register(0);
+	set_dtlbcfg_register(0);
+#endif
+	init_kio();
+	local_flush_tlb_all();
+
+	/* Set rasid register to a known value. */
+
+	set_rasid_register(ASID_INSERT(ASID_USER_FIRST));
+
+	/* Set PTEVADDR special register to the start of the page
+	 * table, which is in kernel mappable space (ie. not
+	 * statically mapped).  This register's value is undefined on
+	 * reset.
+	 */
+	set_ptevaddr_register(XCHAL_PAGE_TABLE_VADDR);
+}
+
+void init_kio(void)
+{
+#if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY && defined(CONFIG_USE_OF)
+	/*
+	 * Update the IO area mapping in case xtensa_kio_paddr has changed
+	 */
+	write_dtlb_entry(__pte(xtensa_kio_paddr + CA_WRITEBACK),
+			XCHAL_KIO_CACHED_VADDR + 6);
+	write_itlb_entry(__pte(xtensa_kio_paddr + CA_WRITEBACK),
+			XCHAL_KIO_CACHED_VADDR + 6);
+	write_dtlb_entry(__pte(xtensa_kio_paddr + CA_BYPASS),
+			XCHAL_KIO_BYPASS_VADDR + 6);
+	write_itlb_entry(__pte(xtensa_kio_paddr + CA_BYPASS),
+			XCHAL_KIO_BYPASS_VADDR + 6);
+#endif
+}
diff --git a/arch/xtensa/mm/tlb.c b/arch/xtensa/mm/tlb.c
new file mode 100644
index 000000000..27a477dae
--- /dev/null
+++ b/arch/xtensa/mm/tlb.c
@@ -0,0 +1,290 @@
+/*
+ * arch/xtensa/mm/tlb.c
+ *
+ * Logic that manipulates the Xtensa MMU.  Derived from MIPS.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2003 Tensilica Inc.
+ *
+ * Joe Taylor
+ * Chris Zankel	<chris@zankel.net>
+ * Marc Gauthier
+ */
+
+#include <linux/mm.h>
+#include <asm/processor.h>
+#include <asm/mmu_context.h>
+#include <asm/tlbflush.h>
+#include <asm/cacheflush.h>
+
+
+static inline void __flush_itlb_all (void)
+{
+	int w, i;
+
+	for (w = 0; w < ITLB_ARF_WAYS; w++) {
+		for (i = 0; i < (1 << XCHAL_ITLB_ARF_ENTRIES_LOG2); i++) {
+			int e = w + (i << PAGE_SHIFT);
+			invalidate_itlb_entry_no_isync(e);
+		}
+	}
+	asm volatile ("isync\n");
+}
+
+static inline void __flush_dtlb_all (void)
+{
+	int w, i;
+
+	for (w = 0; w < DTLB_ARF_WAYS; w++) {
+		for (i = 0; i < (1 << XCHAL_DTLB_ARF_ENTRIES_LOG2); i++) {
+			int e = w + (i << PAGE_SHIFT);
+			invalidate_dtlb_entry_no_isync(e);
+		}
+	}
+	asm volatile ("isync\n");
+}
+
+
+void local_flush_tlb_all(void)
+{
+	__flush_itlb_all();
+	__flush_dtlb_all();
+}
+
+/* If mm is current, we simply assign the current task a new ASID, thus,
+ * invalidating all previous tlb entries. If mm is someone else's user mapping,
+ * wie invalidate the context, thus, when that user mapping is swapped in,
+ * a new context will be assigned to it.
+ */
+
+void local_flush_tlb_mm(struct mm_struct *mm)
+{
+	int cpu = smp_processor_id();
+
+	if (mm == current->active_mm) {
+		unsigned long flags;
+		local_irq_save(flags);
+		mm->context.asid[cpu] = NO_CONTEXT;
+		activate_context(mm, cpu);
+		local_irq_restore(flags);
+	} else {
+		mm->context.asid[cpu] = NO_CONTEXT;
+		mm->context.cpu = -1;
+	}
+}
+
+
+#define _ITLB_ENTRIES (ITLB_ARF_WAYS << XCHAL_ITLB_ARF_ENTRIES_LOG2)
+#define _DTLB_ENTRIES (DTLB_ARF_WAYS << XCHAL_DTLB_ARF_ENTRIES_LOG2)
+#if _ITLB_ENTRIES > _DTLB_ENTRIES
+# define _TLB_ENTRIES _ITLB_ENTRIES
+#else
+# define _TLB_ENTRIES _DTLB_ENTRIES
+#endif
+
+void local_flush_tlb_range(struct vm_area_struct *vma,
+		unsigned long start, unsigned long end)
+{
+	int cpu = smp_processor_id();
+	struct mm_struct *mm = vma->vm_mm;
+	unsigned long flags;
+
+	if (mm->context.asid[cpu] == NO_CONTEXT)
+		return;
+
+	pr_debug("[tlbrange<%02lx,%08lx,%08lx>]\n",
+		 (unsigned long)mm->context.asid[cpu], start, end);
+	local_irq_save(flags);
+
+	if (end-start + (PAGE_SIZE-1) <= _TLB_ENTRIES << PAGE_SHIFT) {
+		int oldpid = get_rasid_register();
+
+		set_rasid_register(ASID_INSERT(mm->context.asid[cpu]));
+		start &= PAGE_MASK;
+		if (vma->vm_flags & VM_EXEC)
+			while(start < end) {
+				invalidate_itlb_mapping(start);
+				invalidate_dtlb_mapping(start);
+				start += PAGE_SIZE;
+			}
+		else
+			while(start < end) {
+				invalidate_dtlb_mapping(start);
+				start += PAGE_SIZE;
+			}
+
+		set_rasid_register(oldpid);
+	} else {
+		local_flush_tlb_mm(mm);
+	}
+	local_irq_restore(flags);
+}
+
+void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
+{
+	int cpu = smp_processor_id();
+	struct mm_struct* mm = vma->vm_mm;
+	unsigned long flags;
+	int oldpid;
+
+	if (mm->context.asid[cpu] == NO_CONTEXT)
+		return;
+
+	local_irq_save(flags);
+
+	oldpid = get_rasid_register();
+	set_rasid_register(ASID_INSERT(mm->context.asid[cpu]));
+
+	if (vma->vm_flags & VM_EXEC)
+		invalidate_itlb_mapping(page);
+	invalidate_dtlb_mapping(page);
+
+	set_rasid_register(oldpid);
+
+	local_irq_restore(flags);
+}
+
+void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
+{
+	if (end > start && start >= TASK_SIZE && end <= PAGE_OFFSET &&
+	    end - start < _TLB_ENTRIES << PAGE_SHIFT) {
+		start &= PAGE_MASK;
+		while (start < end) {
+			invalidate_itlb_mapping(start);
+			invalidate_dtlb_mapping(start);
+			start += PAGE_SIZE;
+		}
+	} else {
+		local_flush_tlb_all();
+	}
+}
+
+void update_mmu_tlb(struct vm_area_struct *vma,
+		    unsigned long address, pte_t *ptep)
+{
+	local_flush_tlb_page(vma, address);
+}
+
+#ifdef CONFIG_DEBUG_TLB_SANITY
+
+static unsigned get_pte_for_vaddr(unsigned vaddr)
+{
+	struct task_struct *task = get_current();
+	struct mm_struct *mm = task->mm;
+	pgd_t *pgd;
+	p4d_t *p4d;
+	pud_t *pud;
+	pmd_t *pmd;
+	pte_t *pte;
+
+	if (!mm)
+		mm = task->active_mm;
+	pgd = pgd_offset(mm, vaddr);
+	if (pgd_none_or_clear_bad(pgd))
+		return 0;
+	p4d = p4d_offset(pgd, vaddr);
+	if (p4d_none_or_clear_bad(p4d))
+		return 0;
+	pud = pud_offset(p4d, vaddr);
+	if (pud_none_or_clear_bad(pud))
+		return 0;
+	pmd = pmd_offset(pud, vaddr);
+	if (pmd_none_or_clear_bad(pmd))
+		return 0;
+	pte = pte_offset_map(pmd, vaddr);
+	if (!pte)
+		return 0;
+	return pte_val(*pte);
+}
+
+enum {
+	TLB_SUSPICIOUS	= 1,
+	TLB_INSANE	= 2,
+};
+
+static void tlb_insane(void)
+{
+	BUG_ON(1);
+}
+
+static void tlb_suspicious(void)
+{
+	WARN_ON(1);
+}
+
+/*
+ * Check that TLB entries with kernel ASID (1) have kernel VMA (>= TASK_SIZE),
+ * and TLB entries with user ASID (>=4) have VMA < TASK_SIZE.
+ *
+ * Check that valid TLB entries either have the same PA as the PTE, or PTE is
+ * marked as non-present. Non-present PTE and the page with non-zero refcount
+ * and zero mapcount is normal for batched TLB flush operation. Zero refcount
+ * means that the page was freed prematurely. Non-zero mapcount is unusual,
+ * but does not necessary means an error, thus marked as suspicious.
+ */
+static int check_tlb_entry(unsigned w, unsigned e, bool dtlb)
+{
+	unsigned tlbidx = w | (e << PAGE_SHIFT);
+	unsigned r0 = dtlb ?
+		read_dtlb_virtual(tlbidx) : read_itlb_virtual(tlbidx);
+	unsigned r1 = dtlb ?
+		read_dtlb_translation(tlbidx) : read_itlb_translation(tlbidx);
+	unsigned vpn = (r0 & PAGE_MASK) | (e << PAGE_SHIFT);
+	unsigned pte = get_pte_for_vaddr(vpn);
+	unsigned mm_asid = (get_rasid_register() >> 8) & ASID_MASK;
+	unsigned tlb_asid = r0 & ASID_MASK;
+	bool kernel = tlb_asid == 1;
+	int rc = 0;
+
+	if (tlb_asid > 0 && ((vpn < TASK_SIZE) == kernel)) {
+		pr_err("%cTLB: way: %u, entry: %u, VPN %08x in %s PTE\n",
+				dtlb ? 'D' : 'I', w, e, vpn,
+				kernel ? "kernel" : "user");
+		rc |= TLB_INSANE;
+	}
+
+	if (tlb_asid == mm_asid) {
+		if ((pte ^ r1) & PAGE_MASK) {
+			pr_err("%cTLB: way: %u, entry: %u, mapping: %08x->%08x, PTE: %08x\n",
+					dtlb ? 'D' : 'I', w, e, r0, r1, pte);
+			if (pte == 0 || !pte_present(__pte(pte))) {
+				struct page *p = pfn_to_page(r1 >> PAGE_SHIFT);
+				pr_err("page refcount: %d, mapcount: %d\n",
+						page_count(p),
+						page_mapcount(p));
+				if (!page_count(p))
+					rc |= TLB_INSANE;
+				else if (page_mapcount(p))
+					rc |= TLB_SUSPICIOUS;
+			} else {
+				rc |= TLB_INSANE;
+			}
+		}
+	}
+	return rc;
+}
+
+void check_tlb_sanity(void)
+{
+	unsigned long flags;
+	unsigned w, e;
+	int bug = 0;
+
+	local_irq_save(flags);
+	for (w = 0; w < DTLB_ARF_WAYS; ++w)
+		for (e = 0; e < (1 << XCHAL_DTLB_ARF_ENTRIES_LOG2); ++e)
+			bug |= check_tlb_entry(w, e, true);
+	for (w = 0; w < ITLB_ARF_WAYS; ++w)
+		for (e = 0; e < (1 << XCHAL_ITLB_ARF_ENTRIES_LOG2); ++e)
+			bug |= check_tlb_entry(w, e, false);
+	if (bug & TLB_INSANE)
+		tlb_insane();
+	if (bug & TLB_SUSPICIOUS)
+		tlb_suspicious();
+	local_irq_restore(flags);
+}
+
+#endif /* CONFIG_DEBUG_TLB_SANITY */
diff --git a/arch/xtensa/platforms/Makefile b/arch/xtensa/platforms/Makefile
new file mode 100644
index 000000000..e2e7e0726
--- /dev/null
+++ b/arch/xtensa/platforms/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_XTENSA_PLATFORM_XT2000)	+= xt2000/
+obj-$(CONFIG_XTENSA_PLATFORM_ISS)	+= iss/
+obj-$(CONFIG_XTENSA_PLATFORM_XTFPGA)	+= xtfpga/
diff --git a/arch/xtensa/platforms/iss/Makefile b/arch/xtensa/platforms/iss/Makefile
new file mode 100644
index 000000000..f3dd5e72a
--- /dev/null
+++ b/arch/xtensa/platforms/iss/Makefile
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# $Id: Makefile,v 1.1.1.1 2002/08/28 16:10:14 aroll Exp $
+#
+# Makefile for the Xtensa Instruction Set Simulator (ISS)
+# "prom monitor" library routines under Linux.
+#
+
+obj-y			= setup.o
+obj-$(CONFIG_TTY)	+= console.o
+obj-$(CONFIG_NET)	+= network.o
+obj-$(CONFIG_BLK_DEV_SIMDISK) += simdisk.o
diff --git a/arch/xtensa/platforms/iss/console.c b/arch/xtensa/platforms/iss/console.c
new file mode 100644
index 000000000..10b79d3c7
--- /dev/null
+++ b/arch/xtensa/platforms/iss/console.c
@@ -0,0 +1,224 @@
+/*
+ * arch/xtensa/platforms/iss/console.c
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001-2005 Tensilica Inc.
+ *   Authors	Christian Zankel, Joe Taylor
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/console.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/major.h>
+#include <linux/param.h>
+#include <linux/seq_file.h>
+#include <linux/serial.h>
+
+#include <linux/uaccess.h>
+#include <asm/irq.h>
+
+#include <platform/simcall.h>
+
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+
+#define SERIAL_MAX_NUM_LINES 1
+#define SERIAL_TIMER_VALUE (HZ / 10)
+
+static void rs_poll(struct timer_list *);
+
+static struct tty_driver *serial_driver;
+static struct tty_port serial_port;
+static DEFINE_TIMER(serial_timer, rs_poll);
+
+static int rs_open(struct tty_struct *tty, struct file * filp)
+{
+	if (tty->count == 1)
+		mod_timer(&serial_timer, jiffies + SERIAL_TIMER_VALUE);
+
+	return 0;
+}
+
+static void rs_close(struct tty_struct *tty, struct file * filp)
+{
+	if (tty->count == 1)
+		del_timer_sync(&serial_timer);
+}
+
+
+static int rs_write(struct tty_struct * tty,
+		    const unsigned char *buf, int count)
+{
+	/* see drivers/char/serialX.c to reference original version */
+
+	simc_write(1, buf, count);
+	return count;
+}
+
+static void rs_poll(struct timer_list *unused)
+{
+	struct tty_port *port = &serial_port;
+	int i = 0;
+	int rd = 1;
+	unsigned char c;
+
+	while (simc_poll(0)) {
+		rd = simc_read(0, &c, 1);
+		if (rd <= 0)
+			break;
+		tty_insert_flip_char(port, c, TTY_NORMAL);
+		i++;
+	}
+
+	if (i)
+		tty_flip_buffer_push(port);
+	if (rd)
+		mod_timer(&serial_timer, jiffies + SERIAL_TIMER_VALUE);
+}
+
+
+static int rs_put_char(struct tty_struct *tty, unsigned char ch)
+{
+	return rs_write(tty, &ch, 1);
+}
+
+static void rs_flush_chars(struct tty_struct *tty)
+{
+}
+
+static unsigned int rs_write_room(struct tty_struct *tty)
+{
+	/* Let's say iss can always accept 2K characters.. */
+	return 2 * 1024;
+}
+
+static void rs_hangup(struct tty_struct *tty)
+{
+	/* Stub, once again.. */
+}
+
+static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+	/* Stub, once again.. */
+}
+
+static int rs_proc_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "serinfo:1.0 driver:0.1\n");
+	return 0;
+}
+
+static const struct tty_operations serial_ops = {
+	.open = rs_open,
+	.close = rs_close,
+	.write = rs_write,
+	.put_char = rs_put_char,
+	.flush_chars = rs_flush_chars,
+	.write_room = rs_write_room,
+	.hangup = rs_hangup,
+	.wait_until_sent = rs_wait_until_sent,
+	.proc_show = rs_proc_show,
+};
+
+static int __init rs_init(void)
+{
+	struct tty_driver *driver;
+	int ret;
+
+	driver = tty_alloc_driver(SERIAL_MAX_NUM_LINES, TTY_DRIVER_REAL_RAW);
+	if (IS_ERR(driver))
+		return PTR_ERR(driver);
+
+	tty_port_init(&serial_port);
+
+	/* Initialize the tty_driver structure */
+
+	driver->driver_name = "iss_serial";
+	driver->name = "ttyS";
+	driver->major = TTY_MAJOR;
+	driver->minor_start = 64;
+	driver->type = TTY_DRIVER_TYPE_SERIAL;
+	driver->subtype = SERIAL_TYPE_NORMAL;
+	driver->init_termios = tty_std_termios;
+	driver->init_termios.c_cflag =
+		B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+
+	tty_set_operations(driver, &serial_ops);
+	tty_port_link_device(&serial_port, driver, 0);
+
+	ret = tty_register_driver(driver);
+	if (ret) {
+		pr_err("Couldn't register serial driver\n");
+		tty_driver_kref_put(driver);
+		tty_port_destroy(&serial_port);
+
+		return ret;
+	}
+
+	serial_driver = driver;
+
+	return 0;
+}
+
+
+static __exit void rs_exit(void)
+{
+	tty_unregister_driver(serial_driver);
+	tty_driver_kref_put(serial_driver);
+	tty_port_destroy(&serial_port);
+}
+
+
+/* We use `late_initcall' instead of just `__initcall' as a workaround for
+ * the fact that (1) simcons_tty_init can't be called before tty_init,
+ * (2) tty_init is called via `module_init', (3) if statically linked,
+ * module_init == device_init, and (4) there's no ordering of init lists.
+ * We can do this easily because simcons is always statically linked, but
+ * other tty drivers that depend on tty_init and which must use
+ * `module_init' to declare their init routines are likely to be broken.
+ */
+
+late_initcall(rs_init);
+
+
+#ifdef CONFIG_SERIAL_CONSOLE
+
+static void iss_console_write(struct console *co, const char *s, unsigned count)
+{
+	if (s && *s != 0) {
+		int len = strlen(s);
+		simc_write(1, s, count < len ? count : len);
+	}
+}
+
+static struct tty_driver* iss_console_device(struct console *c, int *index)
+{
+	*index = c->index;
+	return serial_driver;
+}
+
+
+static struct console sercons = {
+	.name = "ttyS",
+	.write = iss_console_write,
+	.device = iss_console_device,
+	.flags = CON_PRINTBUFFER,
+	.index = -1
+};
+
+static int __init iss_console_init(void)
+{
+	register_console(&sercons);
+	return 0;
+}
+
+console_initcall(iss_console_init);
+
+#endif /* CONFIG_SERIAL_CONSOLE */
+
diff --git a/arch/xtensa/platforms/iss/include/platform/serial.h b/arch/xtensa/platforms/iss/include/platform/serial.h
new file mode 100644
index 000000000..16aec542d
--- /dev/null
+++ b/arch/xtensa/platforms/iss/include/platform/serial.h
@@ -0,0 +1,15 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2012 Tensilica Inc.
+ */
+
+#ifndef __ASM_XTENSA_ISS_SERIAL_H
+#define __ASM_XTENSA_ISS_SERIAL_H
+
+/* Have no meaning on ISS, but needed for 8250_early.c */
+#define BASE_BAUD 0
+
+#endif /* __ASM_XTENSA_ISS_SERIAL_H */
diff --git a/arch/xtensa/platforms/iss/include/platform/simcall-gdbio.h b/arch/xtensa/platforms/iss/include/platform/simcall-gdbio.h
new file mode 100644
index 000000000..e642860e2
--- /dev/null
+++ b/arch/xtensa/platforms/iss/include/platform/simcall-gdbio.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2021 Cadence Design Systems Inc. */
+
+#ifndef _XTENSA_PLATFORM_ISS_SIMCALL_GDBIO_H
+#define _XTENSA_PLATFORM_ISS_SIMCALL_GDBIO_H
+
+/*
+ *  System call like services offered by the GDBIO host.
+ */
+
+#define SYS_open	-2
+#define SYS_close	-3
+#define SYS_read	-4
+#define SYS_write	-5
+#define SYS_lseek	-6
+
+static int errno;
+
+static inline int __simc(int a, int b, int c, int d)
+{
+	register int a1 asm("a2") = a;
+	register int b1 asm("a6") = b;
+	register int c1 asm("a3") = c;
+	register int d1 asm("a4") = d;
+	__asm__ __volatile__ (
+			"break 1, 14\n"
+			: "+r"(a1), "+r"(c1)
+			: "r"(b1), "r"(d1)
+			: "memory");
+	errno = c1;
+	return a1;
+}
+
+#endif /* _XTENSA_PLATFORM_ISS_SIMCALL_GDBIO_H */
diff --git a/arch/xtensa/platforms/iss/include/platform/simcall-iss.h b/arch/xtensa/platforms/iss/include/platform/simcall-iss.h
new file mode 100644
index 000000000..5a1e7a1f1
--- /dev/null
+++ b/arch/xtensa/platforms/iss/include/platform/simcall-iss.h
@@ -0,0 +1,73 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2021 Cadence Design Systems Inc. */
+
+#ifndef _XTENSA_PLATFORM_ISS_SIMCALL_ISS_H
+#define _XTENSA_PLATFORM_ISS_SIMCALL_ISS_H
+
+/*
+ *  System call like services offered by the simulator host.
+ */
+
+#define SYS_nop		0	/* unused */
+#define SYS_exit	1	/*x*/
+#define SYS_fork	2
+#define SYS_read	3	/*x*/
+#define SYS_write	4	/*x*/
+#define SYS_open	5	/*x*/
+#define SYS_close	6	/*x*/
+#define SYS_rename	7	/*x 38 - waitpid */
+#define SYS_creat	8	/*x*/
+#define SYS_link	9	/*x (not implemented on WIN32) */
+#define SYS_unlink	10	/*x*/
+#define SYS_execv	11	/* n/a - execve */
+#define SYS_execve	12	/* 11 - chdir */
+#define SYS_pipe	13	/* 42 - time */
+#define SYS_stat	14	/* 106 - mknod */
+#define SYS_chmod	15
+#define SYS_chown	16	/* 202 - lchown */
+#define SYS_utime	17	/* 30 - break */
+#define SYS_wait	18	/* n/a - oldstat */
+#define SYS_lseek	19	/*x*/
+#define SYS_getpid	20
+#define SYS_isatty	21	/* n/a - mount */
+#define SYS_fstat	22	/* 108 - oldumount */
+#define SYS_time	23	/* 13 - setuid */
+#define SYS_gettimeofday 24	/*x 78 - getuid (not implemented on WIN32) */
+#define SYS_times	25	/*X 43 - stime (Xtensa-specific implementation) */
+#define SYS_socket      26
+#define SYS_sendto      27
+#define SYS_recvfrom    28
+#define SYS_select_one  29      /* not compatible select, one file descriptor at the time */
+#define SYS_bind        30
+#define SYS_ioctl	31
+
+#define SYS_iss_argc	1000	/* returns value of argc */
+#define SYS_iss_argv_size 1001	/* bytes needed for argv & arg strings */
+#define SYS_iss_set_argv 1002	/* saves argv & arg strings at given addr */
+
+/*
+ * SYS_select_one specifiers
+ */
+
+#define  XTISS_SELECT_ONE_READ    1
+#define  XTISS_SELECT_ONE_WRITE   2
+#define  XTISS_SELECT_ONE_EXCEPT  3
+
+static int errno;
+
+static inline int __simc(int a, int b, int c, int d)
+{
+	register int a1 asm("a2") = a;
+	register int b1 asm("a3") = b;
+	register int c1 asm("a4") = c;
+	register int d1 asm("a5") = d;
+	__asm__ __volatile__ (
+			"simcall\n"
+			: "+r"(a1), "+r"(b1)
+			: "r"(c1), "r"(d1)
+			: "memory");
+	errno = b1;
+	return a1;
+}
+
+#endif /* _XTENSA_PLATFORM_ISS_SIMCALL_ISS_H */
diff --git a/arch/xtensa/platforms/iss/include/platform/simcall.h b/arch/xtensa/platforms/iss/include/platform/simcall.h
new file mode 100644
index 000000000..e1ec50ce3
--- /dev/null
+++ b/arch/xtensa/platforms/iss/include/platform/simcall.h
@@ -0,0 +1,110 @@
+/*
+ * include/asm-xtensa/platform-iss/simcall.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 Tensilica Inc.
+ * Copyright (C) 2017 - 2021 Cadence Design Systems Inc.
+ */
+
+#ifndef _XTENSA_PLATFORM_ISS_SIMCALL_H
+#define _XTENSA_PLATFORM_ISS_SIMCALL_H
+
+#include <linux/bug.h>
+
+#ifdef CONFIG_XTENSA_SIMCALL_ISS
+#include <platform/simcall-iss.h>
+#endif
+#ifdef CONFIG_XTENSA_SIMCALL_GDBIO
+#include <platform/simcall-gdbio.h>
+#endif
+
+static inline int simc_exit(int exit_code)
+{
+#ifdef SYS_exit
+	return __simc(SYS_exit, exit_code, 0, 0);
+#else
+	WARN_ONCE(1, "%s: not implemented\n", __func__);
+	return -1;
+#endif
+}
+
+static inline int simc_open(const char *file, int flags, int mode)
+{
+	return __simc(SYS_open, (int) file, flags, mode);
+}
+
+static inline int simc_close(int fd)
+{
+	return __simc(SYS_close, fd, 0, 0);
+}
+
+static inline int simc_ioctl(int fd, int request, void *arg)
+{
+#ifdef SYS_ioctl
+	return __simc(SYS_ioctl, fd, request, (int) arg);
+#else
+	WARN_ONCE(1, "%s: not implemented\n", __func__);
+	return -1;
+#endif
+}
+
+static inline int simc_read(int fd, void *buf, size_t count)
+{
+	return __simc(SYS_read, fd, (int) buf, count);
+}
+
+static inline int simc_write(int fd, const void *buf, size_t count)
+{
+	return __simc(SYS_write, fd, (int) buf, count);
+}
+
+static inline int simc_poll(int fd)
+{
+#ifdef SYS_select_one
+	long timeval[2] = { 0, 0 };
+
+	return __simc(SYS_select_one, fd, XTISS_SELECT_ONE_READ, (int)&timeval);
+#else
+	WARN_ONCE(1, "%s: not implemented\n", __func__);
+	return -1;
+#endif
+}
+
+static inline int simc_lseek(int fd, uint32_t off, int whence)
+{
+	return __simc(SYS_lseek, fd, off, whence);
+}
+
+static inline int simc_argc(void)
+{
+#ifdef SYS_iss_argc
+	return __simc(SYS_iss_argc, 0, 0, 0);
+#else
+	WARN_ONCE(1, "%s: not implemented\n", __func__);
+	return 0;
+#endif
+}
+
+static inline int simc_argv_size(void)
+{
+#ifdef SYS_iss_argv_size
+	return __simc(SYS_iss_argv_size, 0, 0, 0);
+#else
+	WARN_ONCE(1, "%s: not implemented\n", __func__);
+	return 0;
+#endif
+}
+
+static inline void simc_argv(void *buf)
+{
+#ifdef SYS_iss_set_argv
+	__simc(SYS_iss_set_argv, (int)buf, 0, 0);
+#else
+	WARN_ONCE(1, "%s: not implemented\n", __func__);
+#endif
+}
+
+#endif /* _XTENSA_PLATFORM_ISS_SIMCALL_H */
diff --git a/arch/xtensa/platforms/iss/network.c b/arch/xtensa/platforms/iss/network.c
new file mode 100644
index 000000000..bea539f90
--- /dev/null
+++ b/arch/xtensa/platforms/iss/network.c
@@ -0,0 +1,640 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *
+ * arch/xtensa/platforms/iss/network.c
+ *
+ * Platform specific initialization.
+ *
+ * Authors: Chris Zankel <chris@zankel.net>
+ * Based on work form the UML team.
+ *
+ * Copyright 2005 Tensilica Inc.
+ */
+
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
+#include <linux/list.h>
+#include <linux/irq.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+#include <linux/if_ether.h>
+#include <linux/inetdevice.h>
+#include <linux/init.h>
+#include <linux/if_tun.h>
+#include <linux/etherdevice.h>
+#include <linux/interrupt.h>
+#include <linux/ioctl.h>
+#include <linux/memblock.h>
+#include <linux/ethtool.h>
+#include <linux/rtnetlink.h>
+#include <linux/platform_device.h>
+
+#include <platform/simcall.h>
+
+#define DRIVER_NAME "iss-netdev"
+#define ETH_MAX_PACKET 1500
+#define ETH_HEADER_OTHER 14
+#define ISS_NET_TIMER_VALUE (HZ / 10)
+
+/* ------------------------------------------------------------------------- */
+
+/* We currently only support the TUNTAP transport protocol. */
+
+#define TRANSPORT_TUNTAP_NAME "tuntap"
+#define TRANSPORT_TUNTAP_MTU ETH_MAX_PACKET
+
+struct tuntap_info {
+	char dev_name[IFNAMSIZ];
+	int fd;
+};
+
+/* ------------------------------------------------------------------------- */
+
+
+struct iss_net_private;
+
+struct iss_net_ops {
+	int (*open)(struct iss_net_private *lp);
+	void (*close)(struct iss_net_private *lp);
+	int (*read)(struct iss_net_private *lp, struct sk_buff **skb);
+	int (*write)(struct iss_net_private *lp, struct sk_buff **skb);
+	unsigned short (*protocol)(struct sk_buff *skb);
+	int (*poll)(struct iss_net_private *lp);
+};
+
+/* This structure contains out private information for the driver. */
+
+struct iss_net_private {
+	spinlock_t lock;
+	struct net_device *dev;
+	struct platform_device pdev;
+	struct timer_list tl;
+	struct rtnl_link_stats64 stats;
+
+	struct timer_list timer;
+	unsigned int timer_val;
+
+	int index;
+	int mtu;
+
+	struct {
+		union {
+			struct tuntap_info tuntap;
+		} info;
+
+		const struct iss_net_ops *net_ops;
+	} tp;
+
+};
+
+/* ================================ HELPERS ================================ */
+
+
+static char *split_if_spec(char *str, ...)
+{
+	char **arg, *end;
+	va_list ap;
+
+	va_start(ap, str);
+	while ((arg = va_arg(ap, char**)) != NULL) {
+		if (*str == '\0') {
+			va_end(ap);
+			return NULL;
+		}
+		end = strchr(str, ',');
+		if (end != str)
+			*arg = str;
+		if (end == NULL) {
+			va_end(ap);
+			return NULL;
+		}
+		*end++ = '\0';
+		str = end;
+	}
+	va_end(ap);
+	return str;
+}
+
+/* Set Ethernet address of the specified device. */
+
+static void setup_etheraddr(struct net_device *dev, char *str)
+{
+	u8 addr[ETH_ALEN];
+
+	if (str == NULL)
+		goto random;
+
+	if (!mac_pton(str, addr)) {
+		pr_err("%s: failed to parse '%s' as an ethernet address\n",
+		       dev->name, str);
+		goto random;
+	}
+	if (is_multicast_ether_addr(addr)) {
+		pr_err("%s: attempt to assign a multicast ethernet address\n",
+		       dev->name);
+		goto random;
+	}
+	if (!is_valid_ether_addr(addr)) {
+		pr_err("%s: attempt to assign an invalid ethernet address\n",
+		       dev->name);
+		goto random;
+	}
+	if (!is_local_ether_addr(addr))
+		pr_warn("%s: assigning a globally valid ethernet address\n",
+			dev->name);
+	eth_hw_addr_set(dev, addr);
+	return;
+
+random:
+	pr_info("%s: choosing a random ethernet address\n",
+		dev->name);
+	eth_hw_addr_random(dev);
+}
+
+/* ======================= TUNTAP TRANSPORT INTERFACE ====================== */
+
+static int tuntap_open(struct iss_net_private *lp)
+{
+	struct ifreq ifr;
+	char *dev_name = lp->tp.info.tuntap.dev_name;
+	int err = -EINVAL;
+	int fd;
+
+	fd = simc_open("/dev/net/tun", 02, 0); /* O_RDWR */
+	if (fd < 0) {
+		pr_err("%s: failed to open /dev/net/tun, returned %d (errno = %d)\n",
+		       lp->dev->name, fd, errno);
+		return fd;
+	}
+
+	memset(&ifr, 0, sizeof(ifr));
+	ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
+	strscpy(ifr.ifr_name, dev_name, sizeof(ifr.ifr_name));
+
+	err = simc_ioctl(fd, TUNSETIFF, &ifr);
+	if (err < 0) {
+		pr_err("%s: failed to set interface %s, returned %d (errno = %d)\n",
+		       lp->dev->name, dev_name, err, errno);
+		simc_close(fd);
+		return err;
+	}
+
+	lp->tp.info.tuntap.fd = fd;
+	return err;
+}
+
+static void tuntap_close(struct iss_net_private *lp)
+{
+	simc_close(lp->tp.info.tuntap.fd);
+	lp->tp.info.tuntap.fd = -1;
+}
+
+static int tuntap_read(struct iss_net_private *lp, struct sk_buff **skb)
+{
+	return simc_read(lp->tp.info.tuntap.fd,
+			(*skb)->data, (*skb)->dev->mtu + ETH_HEADER_OTHER);
+}
+
+static int tuntap_write(struct iss_net_private *lp, struct sk_buff **skb)
+{
+	return simc_write(lp->tp.info.tuntap.fd, (*skb)->data, (*skb)->len);
+}
+
+static unsigned short tuntap_protocol(struct sk_buff *skb)
+{
+	return eth_type_trans(skb, skb->dev);
+}
+
+static int tuntap_poll(struct iss_net_private *lp)
+{
+	return simc_poll(lp->tp.info.tuntap.fd);
+}
+
+static const struct iss_net_ops tuntap_ops = {
+	.open		= tuntap_open,
+	.close		= tuntap_close,
+	.read		= tuntap_read,
+	.write		= tuntap_write,
+	.protocol	= tuntap_protocol,
+	.poll		= tuntap_poll,
+};
+
+/*
+ * ethX=tuntap,[mac address],device name
+ */
+
+static int tuntap_probe(struct iss_net_private *lp, int index, char *init)
+{
+	struct net_device *dev = lp->dev;
+	char *dev_name = NULL, *mac_str = NULL, *rem = NULL;
+
+	/* Transport should be 'tuntap': ethX=tuntap,mac,dev_name */
+
+	if (strncmp(init, TRANSPORT_TUNTAP_NAME,
+		    sizeof(TRANSPORT_TUNTAP_NAME) - 1))
+		return 0;
+
+	init += sizeof(TRANSPORT_TUNTAP_NAME) - 1;
+	if (*init == ',') {
+		rem = split_if_spec(init + 1, &mac_str, &dev_name, NULL);
+		if (rem != NULL) {
+			pr_err("%s: extra garbage on specification : '%s'\n",
+			       dev->name, rem);
+			return 0;
+		}
+	} else if (*init != '\0') {
+		pr_err("%s: invalid argument: %s. Skipping device!\n",
+		       dev->name, init);
+		return 0;
+	}
+
+	if (!dev_name) {
+		pr_err("%s: missing tuntap device name\n", dev->name);
+		return 0;
+	}
+
+	strscpy(lp->tp.info.tuntap.dev_name, dev_name,
+		sizeof(lp->tp.info.tuntap.dev_name));
+
+	setup_etheraddr(dev, mac_str);
+
+	lp->mtu = TRANSPORT_TUNTAP_MTU;
+
+	lp->tp.info.tuntap.fd = -1;
+	lp->tp.net_ops = &tuntap_ops;
+
+	return 1;
+}
+
+/* ================================ ISS NET ================================ */
+
+static int iss_net_rx(struct net_device *dev)
+{
+	struct iss_net_private *lp = netdev_priv(dev);
+	int pkt_len;
+	struct sk_buff *skb;
+
+	/* Check if there is any new data. */
+
+	if (lp->tp.net_ops->poll(lp) == 0)
+		return 0;
+
+	/* Try to allocate memory, if it fails, try again next round. */
+
+	skb = dev_alloc_skb(dev->mtu + 2 + ETH_HEADER_OTHER);
+	if (skb == NULL) {
+		spin_lock_bh(&lp->lock);
+		lp->stats.rx_dropped++;
+		spin_unlock_bh(&lp->lock);
+		return 0;
+	}
+
+	skb_reserve(skb, 2);
+
+	/* Setup skb */
+
+	skb->dev = dev;
+	skb_reset_mac_header(skb);
+	pkt_len = lp->tp.net_ops->read(lp, &skb);
+	skb_put(skb, pkt_len);
+
+	if (pkt_len > 0) {
+		skb_trim(skb, pkt_len);
+		skb->protocol = lp->tp.net_ops->protocol(skb);
+
+		spin_lock_bh(&lp->lock);
+		lp->stats.rx_bytes += skb->len;
+		lp->stats.rx_packets++;
+		spin_unlock_bh(&lp->lock);
+		netif_rx(skb);
+		return pkt_len;
+	}
+	kfree_skb(skb);
+	return pkt_len;
+}
+
+static int iss_net_poll(struct iss_net_private *lp)
+{
+	int err, ret = 0;
+
+	if (!netif_running(lp->dev))
+		return 0;
+
+	while ((err = iss_net_rx(lp->dev)) > 0)
+		ret++;
+
+	if (err < 0) {
+		pr_err("Device '%s' read returned %d, shutting it down\n",
+		       lp->dev->name, err);
+		dev_close(lp->dev);
+	} else {
+		/* FIXME reactivate_fd(lp->fd, ISS_ETH_IRQ); */
+	}
+
+	return ret;
+}
+
+
+static void iss_net_timer(struct timer_list *t)
+{
+	struct iss_net_private *lp = from_timer(lp, t, timer);
+
+	iss_net_poll(lp);
+	mod_timer(&lp->timer, jiffies + lp->timer_val);
+}
+
+
+static int iss_net_open(struct net_device *dev)
+{
+	struct iss_net_private *lp = netdev_priv(dev);
+	int err;
+
+	err = lp->tp.net_ops->open(lp);
+	if (err < 0)
+		return err;
+
+	netif_start_queue(dev);
+
+	/* clear buffer - it can happen that the host side of the interface
+	 * is full when we get here. In this case, new data is never queued,
+	 * SIGIOs never arrive, and the net never works.
+	 */
+	while ((err = iss_net_rx(dev)) > 0)
+		;
+
+	timer_setup(&lp->timer, iss_net_timer, 0);
+	lp->timer_val = ISS_NET_TIMER_VALUE;
+	mod_timer(&lp->timer, jiffies + lp->timer_val);
+
+	return err;
+}
+
+static int iss_net_close(struct net_device *dev)
+{
+	struct iss_net_private *lp = netdev_priv(dev);
+
+	netif_stop_queue(dev);
+	del_timer_sync(&lp->timer);
+	lp->tp.net_ops->close(lp);
+
+	return 0;
+}
+
+static int iss_net_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct iss_net_private *lp = netdev_priv(dev);
+	int len;
+
+	netif_stop_queue(dev);
+
+	len = lp->tp.net_ops->write(lp, &skb);
+
+	if (len == skb->len) {
+		spin_lock_bh(&lp->lock);
+		lp->stats.tx_packets++;
+		lp->stats.tx_bytes += skb->len;
+		spin_unlock_bh(&lp->lock);
+		netif_trans_update(dev);
+		netif_start_queue(dev);
+
+		/* this is normally done in the interrupt when tx finishes */
+		netif_wake_queue(dev);
+
+	} else if (len == 0) {
+		netif_start_queue(dev);
+		spin_lock_bh(&lp->lock);
+		lp->stats.tx_dropped++;
+		spin_unlock_bh(&lp->lock);
+
+	} else {
+		netif_start_queue(dev);
+		pr_err("%s: %s failed(%d)\n", dev->name, __func__, len);
+	}
+
+
+	dev_kfree_skb(skb);
+	return NETDEV_TX_OK;
+}
+
+
+static void iss_net_get_stats64(struct net_device *dev,
+				struct rtnl_link_stats64 *stats)
+{
+	struct iss_net_private *lp = netdev_priv(dev);
+
+	spin_lock_bh(&lp->lock);
+	*stats = lp->stats;
+	spin_unlock_bh(&lp->lock);
+}
+
+static void iss_net_set_multicast_list(struct net_device *dev)
+{
+}
+
+static void iss_net_tx_timeout(struct net_device *dev, unsigned int txqueue)
+{
+}
+
+static int iss_net_change_mtu(struct net_device *dev, int new_mtu)
+{
+	return -EINVAL;
+}
+
+static void iss_net_user_timer_expire(struct timer_list *unused)
+{
+}
+
+
+static struct platform_driver iss_net_driver = {
+	.driver = {
+		.name  = DRIVER_NAME,
+	},
+};
+
+static int driver_registered;
+
+static const struct net_device_ops iss_netdev_ops = {
+	.ndo_open		= iss_net_open,
+	.ndo_stop		= iss_net_close,
+	.ndo_get_stats64	= iss_net_get_stats64,
+	.ndo_start_xmit		= iss_net_start_xmit,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_change_mtu		= iss_net_change_mtu,
+	.ndo_set_mac_address	= eth_mac_addr,
+	.ndo_tx_timeout		= iss_net_tx_timeout,
+	.ndo_set_rx_mode	= iss_net_set_multicast_list,
+};
+
+static void iss_net_pdev_release(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct iss_net_private *lp =
+		container_of(pdev, struct iss_net_private, pdev);
+
+	free_netdev(lp->dev);
+}
+
+static void iss_net_configure(int index, char *init)
+{
+	struct net_device *dev;
+	struct iss_net_private *lp;
+
+	dev = alloc_etherdev(sizeof(*lp));
+	if (dev == NULL) {
+		pr_err("eth_configure: failed to allocate device\n");
+		return;
+	}
+
+	/* Initialize private element. */
+
+	lp = netdev_priv(dev);
+	*lp = (struct iss_net_private) {
+		.dev			= dev,
+		.index			= index,
+	};
+
+	spin_lock_init(&lp->lock);
+	/*
+	 * If this name ends up conflicting with an existing registered
+	 * netdevice, that is OK, register_netdev{,ice}() will notice this
+	 * and fail.
+	 */
+	snprintf(dev->name, sizeof(dev->name), "eth%d", index);
+
+	/*
+	 * Try all transport protocols.
+	 * Note: more protocols can be added by adding '&& !X_init(lp, eth)'.
+	 */
+
+	if (!tuntap_probe(lp, index, init)) {
+		pr_err("%s: invalid arguments. Skipping device!\n",
+		       dev->name);
+		goto err_free_netdev;
+	}
+
+	pr_info("Netdevice %d (%pM)\n", index, dev->dev_addr);
+
+	/* sysfs register */
+
+	if (!driver_registered) {
+		if (platform_driver_register(&iss_net_driver))
+			goto err_free_netdev;
+		driver_registered = 1;
+	}
+
+	lp->pdev.id = index;
+	lp->pdev.name = DRIVER_NAME;
+	lp->pdev.dev.release = iss_net_pdev_release;
+	if (platform_device_register(&lp->pdev))
+		goto err_free_netdev;
+	SET_NETDEV_DEV(dev, &lp->pdev.dev);
+
+	dev->netdev_ops = &iss_netdev_ops;
+	dev->mtu = lp->mtu;
+	dev->watchdog_timeo = (HZ >> 1);
+	dev->irq = -1;
+
+	rtnl_lock();
+	if (register_netdevice(dev)) {
+		rtnl_unlock();
+		pr_err("%s: error registering net device!\n", dev->name);
+		platform_device_unregister(&lp->pdev);
+		return;
+	}
+	rtnl_unlock();
+
+	timer_setup(&lp->tl, iss_net_user_timer_expire, 0);
+
+	return;
+
+err_free_netdev:
+	free_netdev(dev);
+}
+
+/* ------------------------------------------------------------------------- */
+
+/* Filled in during early boot */
+
+struct list_head eth_cmd_line = LIST_HEAD_INIT(eth_cmd_line);
+
+struct iss_net_init {
+	struct list_head list;
+	char *init;		/* init string */
+	int index;
+};
+
+/*
+ * Parse the command line and look for 'ethX=...' fields, and register all
+ * those fields. They will be later initialized in iss_net_init.
+ */
+
+static int __init iss_net_setup(char *str)
+{
+	struct iss_net_init *device = NULL;
+	struct iss_net_init *new;
+	struct list_head *ele;
+	char *end;
+	int rc;
+	unsigned n;
+
+	end = strchr(str, '=');
+	if (!end) {
+		pr_err("Expected '=' after device number\n");
+		return 1;
+	}
+	*end = 0;
+	rc = kstrtouint(str, 0, &n);
+	*end = '=';
+	if (rc < 0) {
+		pr_err("Failed to parse '%s'\n", str);
+		return 1;
+	}
+	str = end;
+
+	list_for_each(ele, &eth_cmd_line) {
+		device = list_entry(ele, struct iss_net_init, list);
+		if (device->index == n)
+			break;
+	}
+
+	if (device && device->index == n) {
+		pr_err("Device %u already configured\n", n);
+		return 1;
+	}
+
+	new = memblock_alloc(sizeof(*new), SMP_CACHE_BYTES);
+	if (new == NULL) {
+		pr_err("Alloc_bootmem failed\n");
+		return 1;
+	}
+
+	INIT_LIST_HEAD(&new->list);
+	new->index = n;
+	new->init = str + 1;
+
+	list_add_tail(&new->list, &eth_cmd_line);
+	return 1;
+}
+
+__setup("eth", iss_net_setup);
+
+/*
+ * Initialize all ISS Ethernet devices previously registered in iss_net_setup.
+ */
+
+static int iss_net_init(void)
+{
+	struct list_head *ele, *next;
+
+	/* Walk through all Ethernet devices specified in the command line. */
+
+	list_for_each_safe(ele, next, &eth_cmd_line) {
+		struct iss_net_init *eth;
+		eth = list_entry(ele, struct iss_net_init, list);
+		iss_net_configure(eth->index, eth->init);
+	}
+
+	return 1;
+}
+device_initcall(iss_net_init);
diff --git a/arch/xtensa/platforms/iss/setup.c b/arch/xtensa/platforms/iss/setup.c
new file mode 100644
index 000000000..d3433e1bb
--- /dev/null
+++ b/arch/xtensa/platforms/iss/setup.c
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *
+ * arch/xtensa/platform-iss/setup.c
+ *
+ * Platform specific initialization.
+ *
+ * Authors: Chris Zankel <chris@zankel.net>
+ *          Joe Taylor <joe@tensilica.com>
+ *
+ * Copyright 2001 - 2005 Tensilica Inc.
+ * Copyright 2017 Cadence Design Systems Inc.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/notifier.h>
+#include <linux/panic_notifier.h>
+#include <linux/printk.h>
+#include <linux/string.h>
+
+#include <asm/platform.h>
+#include <asm/setup.h>
+
+#include <platform/simcall.h>
+
+
+void platform_halt(void)
+{
+	pr_info(" ** Called platform_halt() **\n");
+	simc_exit(0);
+}
+
+void platform_power_off(void)
+{
+	pr_info(" ** Called platform_power_off() **\n");
+	simc_exit(0);
+}
+
+void platform_restart(void)
+{
+	/* Flush and reset the mmu, simulate a processor reset, and
+	 * jump to the reset vector. */
+	cpu_reset();
+	/* control never gets here */
+}
+
+static int
+iss_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
+{
+	simc_exit(1);
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block iss_panic_block = {
+	.notifier_call = iss_panic_event,
+};
+
+void __init platform_setup(char **p_cmdline)
+{
+	static void *argv[COMMAND_LINE_SIZE / sizeof(void *)] __initdata;
+	static char cmdline[COMMAND_LINE_SIZE] __initdata;
+	int argc = simc_argc();
+	int argv_size = simc_argv_size();
+
+	if (argc > 1) {
+		if (argv_size > sizeof(argv)) {
+			pr_err("%s: command line too long: argv_size = %d\n",
+			       __func__, argv_size);
+		} else {
+			int i;
+
+			cmdline[0] = 0;
+			simc_argv((void *)argv);
+
+			for (i = 1; i < argc; ++i) {
+				if (i > 1)
+					strcat(cmdline, " ");
+				strcat(cmdline, argv[i]);
+			}
+			*p_cmdline = cmdline;
+		}
+	}
+
+	atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block);
+}
diff --git a/arch/xtensa/platforms/iss/simdisk.c b/arch/xtensa/platforms/iss/simdisk.c
new file mode 100644
index 000000000..f50caaa1c
--- /dev/null
+++ b/arch/xtensa/platforms/iss/simdisk.c
@@ -0,0 +1,366 @@
+/*
+ * arch/xtensa/platforms/iss/simdisk.c
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001-2013 Tensilica Inc.
+ *   Authors	Victor Prupis
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/blkdev.h>
+#include <linux/bio.h>
+#include <linux/proc_fs.h>
+#include <linux/uaccess.h>
+#include <platform/simcall.h>
+
+#define SIMDISK_MAJOR 240
+#define SIMDISK_MINORS 1
+#define MAX_SIMDISK_COUNT 10
+
+struct simdisk {
+	const char *filename;
+	spinlock_t lock;
+	struct gendisk *gd;
+	struct proc_dir_entry *procfile;
+	int users;
+	unsigned long size;
+	int fd;
+};
+
+
+static int simdisk_count = CONFIG_BLK_DEV_SIMDISK_COUNT;
+module_param(simdisk_count, int, S_IRUGO);
+MODULE_PARM_DESC(simdisk_count, "Number of simdisk units.");
+
+static int n_files;
+static const char *filename[MAX_SIMDISK_COUNT] = {
+#ifdef CONFIG_SIMDISK0_FILENAME
+	CONFIG_SIMDISK0_FILENAME,
+#ifdef CONFIG_SIMDISK1_FILENAME
+	CONFIG_SIMDISK1_FILENAME,
+#endif
+#endif
+};
+
+static int simdisk_param_set_filename(const char *val,
+		const struct kernel_param *kp)
+{
+	if (n_files < ARRAY_SIZE(filename))
+		filename[n_files++] = val;
+	else
+		return -EINVAL;
+	return 0;
+}
+
+static const struct kernel_param_ops simdisk_param_ops_filename = {
+	.set = simdisk_param_set_filename,
+};
+module_param_cb(filename, &simdisk_param_ops_filename, &n_files, 0);
+MODULE_PARM_DESC(filename, "Backing storage filename.");
+
+static int simdisk_major = SIMDISK_MAJOR;
+
+static void simdisk_transfer(struct simdisk *dev, unsigned long sector,
+		unsigned long nsect, char *buffer, int write)
+{
+	unsigned long offset = sector << SECTOR_SHIFT;
+	unsigned long nbytes = nsect << SECTOR_SHIFT;
+
+	if (offset > dev->size || dev->size - offset < nbytes) {
+		pr_notice("Beyond-end %s (%ld %ld)\n",
+				write ? "write" : "read", offset, nbytes);
+		return;
+	}
+
+	spin_lock(&dev->lock);
+	while (nbytes > 0) {
+		unsigned long io;
+
+		simc_lseek(dev->fd, offset, SEEK_SET);
+		READ_ONCE(*buffer);
+		if (write)
+			io = simc_write(dev->fd, buffer, nbytes);
+		else
+			io = simc_read(dev->fd, buffer, nbytes);
+		if (io == -1) {
+			pr_err("SIMDISK: IO error %d\n", errno);
+			break;
+		}
+		buffer += io;
+		offset += io;
+		nbytes -= io;
+	}
+	spin_unlock(&dev->lock);
+}
+
+static void simdisk_submit_bio(struct bio *bio)
+{
+	struct simdisk *dev = bio->bi_bdev->bd_disk->private_data;
+	struct bio_vec bvec;
+	struct bvec_iter iter;
+	sector_t sector = bio->bi_iter.bi_sector;
+
+	bio_for_each_segment(bvec, bio, iter) {
+		char *buffer = bvec_kmap_local(&bvec);
+		unsigned len = bvec.bv_len >> SECTOR_SHIFT;
+
+		simdisk_transfer(dev, sector, len, buffer,
+				bio_data_dir(bio) == WRITE);
+		sector += len;
+		kunmap_local(buffer);
+	}
+
+	bio_endio(bio);
+}
+
+static int simdisk_open(struct block_device *bdev, fmode_t mode)
+{
+	struct simdisk *dev = bdev->bd_disk->private_data;
+
+	spin_lock(&dev->lock);
+	++dev->users;
+	spin_unlock(&dev->lock);
+	return 0;
+}
+
+static void simdisk_release(struct gendisk *disk, fmode_t mode)
+{
+	struct simdisk *dev = disk->private_data;
+	spin_lock(&dev->lock);
+	--dev->users;
+	spin_unlock(&dev->lock);
+}
+
+static const struct block_device_operations simdisk_ops = {
+	.owner		= THIS_MODULE,
+	.submit_bio	= simdisk_submit_bio,
+	.open		= simdisk_open,
+	.release	= simdisk_release,
+};
+
+static struct simdisk *sddev;
+static struct proc_dir_entry *simdisk_procdir;
+
+static int simdisk_attach(struct simdisk *dev, const char *filename)
+{
+	int err = 0;
+
+	filename = kstrdup(filename, GFP_KERNEL);
+	if (filename == NULL)
+		return -ENOMEM;
+
+	spin_lock(&dev->lock);
+
+	if (dev->fd != -1) {
+		err = -EBUSY;
+		goto out;
+	}
+	dev->fd = simc_open(filename, O_RDWR, 0);
+	if (dev->fd == -1) {
+		pr_err("SIMDISK: Can't open %s: %d\n", filename, errno);
+		err = -ENODEV;
+		goto out;
+	}
+	dev->size = simc_lseek(dev->fd, 0, SEEK_END);
+	set_capacity(dev->gd, dev->size >> SECTOR_SHIFT);
+	dev->filename = filename;
+	pr_info("SIMDISK: %s=%s\n", dev->gd->disk_name, dev->filename);
+out:
+	if (err)
+		kfree(filename);
+	spin_unlock(&dev->lock);
+
+	return err;
+}
+
+static int simdisk_detach(struct simdisk *dev)
+{
+	int err = 0;
+
+	spin_lock(&dev->lock);
+
+	if (dev->users != 0) {
+		err = -EBUSY;
+	} else if (dev->fd != -1) {
+		if (simc_close(dev->fd)) {
+			pr_err("SIMDISK: error closing %s: %d\n",
+					dev->filename, errno);
+			err = -EIO;
+		} else {
+			pr_info("SIMDISK: %s detached from %s\n",
+					dev->gd->disk_name, dev->filename);
+			dev->fd = -1;
+			kfree(dev->filename);
+			dev->filename = NULL;
+		}
+	}
+	spin_unlock(&dev->lock);
+	return err;
+}
+
+static ssize_t proc_read_simdisk(struct file *file, char __user *buf,
+			size_t size, loff_t *ppos)
+{
+	struct simdisk *dev = pde_data(file_inode(file));
+	const char *s = dev->filename;
+	if (s) {
+		ssize_t len = strlen(s);
+		char *temp = kmalloc(len + 2, GFP_KERNEL);
+
+		if (!temp)
+			return -ENOMEM;
+
+		len = scnprintf(temp, len + 2, "%s\n", s);
+		len = simple_read_from_buffer(buf, size, ppos,
+					      temp, len);
+
+		kfree(temp);
+		return len;
+	}
+	return simple_read_from_buffer(buf, size, ppos, "\n", 1);
+}
+
+static ssize_t proc_write_simdisk(struct file *file, const char __user *buf,
+			size_t count, loff_t *ppos)
+{
+	char *tmp = memdup_user_nul(buf, count);
+	struct simdisk *dev = pde_data(file_inode(file));
+	int err;
+
+	if (IS_ERR(tmp))
+		return PTR_ERR(tmp);
+
+	err = simdisk_detach(dev);
+	if (err != 0)
+		goto out_free;
+
+	if (count > 0 && tmp[count - 1] == '\n')
+		tmp[count - 1] = 0;
+
+	if (tmp[0])
+		err = simdisk_attach(dev, tmp);
+
+	if (err == 0)
+		err = count;
+out_free:
+	kfree(tmp);
+	return err;
+}
+
+static const struct proc_ops simdisk_proc_ops = {
+	.proc_read	= proc_read_simdisk,
+	.proc_write	= proc_write_simdisk,
+	.proc_lseek	= default_llseek,
+};
+
+static int __init simdisk_setup(struct simdisk *dev, int which,
+		struct proc_dir_entry *procdir)
+{
+	char tmp[2] = { '0' + which, 0 };
+	int err = -ENOMEM;
+
+	dev->fd = -1;
+	dev->filename = NULL;
+	spin_lock_init(&dev->lock);
+	dev->users = 0;
+
+	dev->gd = blk_alloc_disk(NUMA_NO_NODE);
+	if (!dev->gd)
+		goto out;
+	dev->gd->major = simdisk_major;
+	dev->gd->first_minor = which;
+	dev->gd->minors = SIMDISK_MINORS;
+	dev->gd->fops = &simdisk_ops;
+	dev->gd->private_data = dev;
+	snprintf(dev->gd->disk_name, 32, "simdisk%d", which);
+	set_capacity(dev->gd, 0);
+	err = add_disk(dev->gd);
+	if (err)
+		goto out_cleanup_disk;
+
+	dev->procfile = proc_create_data(tmp, 0644, procdir, &simdisk_proc_ops, dev);
+
+	return 0;
+
+out_cleanup_disk:
+	put_disk(dev->gd);
+out:
+	return err;
+}
+
+static int __init simdisk_init(void)
+{
+	int i;
+
+	if (register_blkdev(simdisk_major, "simdisk") < 0) {
+		pr_err("SIMDISK: register_blkdev: %d\n", simdisk_major);
+		return -EIO;
+	}
+	pr_info("SIMDISK: major: %d\n", simdisk_major);
+
+	if (n_files > simdisk_count)
+		simdisk_count = n_files;
+	if (simdisk_count > MAX_SIMDISK_COUNT)
+		simdisk_count = MAX_SIMDISK_COUNT;
+
+	sddev = kmalloc_array(simdisk_count, sizeof(*sddev), GFP_KERNEL);
+	if (sddev == NULL)
+		goto out_unregister;
+
+	simdisk_procdir = proc_mkdir("simdisk", 0);
+	if (simdisk_procdir == NULL)
+		goto out_free_unregister;
+
+	for (i = 0; i < simdisk_count; ++i) {
+		if (simdisk_setup(sddev + i, i, simdisk_procdir) == 0) {
+			if (filename[i] != NULL && filename[i][0] != 0 &&
+					(n_files == 0 || i < n_files))
+				simdisk_attach(sddev + i, filename[i]);
+		}
+	}
+
+	return 0;
+
+out_free_unregister:
+	kfree(sddev);
+out_unregister:
+	unregister_blkdev(simdisk_major, "simdisk");
+	return -ENOMEM;
+}
+module_init(simdisk_init);
+
+static void simdisk_teardown(struct simdisk *dev, int which,
+		struct proc_dir_entry *procdir)
+{
+	char tmp[2] = { '0' + which, 0 };
+
+	simdisk_detach(dev);
+	if (dev->gd) {
+		del_gendisk(dev->gd);
+		put_disk(dev->gd);
+	}
+	remove_proc_entry(tmp, procdir);
+}
+
+static void __exit simdisk_exit(void)
+{
+	int i;
+
+	for (i = 0; i < simdisk_count; ++i)
+		simdisk_teardown(sddev + i, i, simdisk_procdir);
+	remove_proc_entry("simdisk", 0);
+	kfree(sddev);
+	unregister_blkdev(simdisk_major, "simdisk");
+}
+module_exit(simdisk_exit);
+
+MODULE_ALIAS_BLOCKDEV_MAJOR(SIMDISK_MAJOR);
+
+MODULE_LICENSE("GPL");
diff --git a/arch/xtensa/platforms/xt2000/Makefile b/arch/xtensa/platforms/xt2000/Makefile
new file mode 100644
index 000000000..53eaeba5e
--- /dev/null
+++ b/arch/xtensa/platforms/xt2000/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the Tensilica XT2000 Emulation Board
+#
+
+obj-y 			= setup.o
diff --git a/arch/xtensa/platforms/xt2000/include/platform/hardware.h b/arch/xtensa/platforms/xt2000/include/platform/hardware.h
new file mode 100644
index 000000000..9f213f573
--- /dev/null
+++ b/arch/xtensa/platforms/xt2000/include/platform/hardware.h
@@ -0,0 +1,43 @@
+/*
+ * platform/hardware.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 Tensilica Inc.
+ */
+
+/*
+ * This file contains the hardware configuration of the XT2000 board.
+ */
+
+#ifndef _XTENSA_XT2000_HARDWARE_H
+#define _XTENSA_XT2000_HARDWARE_H
+
+#include <asm/core.h>
+
+/*
+ * On-board components.
+ */
+
+#define SONIC83934_INTNUM	XCHAL_EXTINT3_NUM
+#define SONIC83934_ADDR		IOADDR(0x0d030000)
+
+/*
+ * V3-PCI
+ */
+
+/* The XT2000 uses the V3 as a cascaded interrupt controller for the PCI bus */
+
+#define IRQ_PCI_A		(XCHAL_NUM_INTERRUPTS + 0)
+#define IRQ_PCI_B		(XCHAL_NUM_INTERRUPTS + 1)
+#define IRQ_PCI_C		(XCHAL_NUM_INTERRUPTS + 2)
+
+/*
+ * Various other components.
+ */
+
+#define XT2000_LED_ADDR		IOADDR(0x0d040000)
+
+#endif /* _XTENSA_XT2000_HARDWARE_H */
diff --git a/arch/xtensa/platforms/xt2000/include/platform/serial.h b/arch/xtensa/platforms/xt2000/include/platform/serial.h
new file mode 100644
index 000000000..cde804827
--- /dev/null
+++ b/arch/xtensa/platforms/xt2000/include/platform/serial.h
@@ -0,0 +1,28 @@
+/*
+ * platform/serial.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_XT2000_SERIAL_H
+#define _XTENSA_XT2000_SERIAL_H
+
+#include <asm/core.h>
+#include <asm/io.h>
+
+/*  National-Semi PC16552D DUART:  */
+
+#define DUART16552_1_INTNUM	XCHAL_EXTINT4_NUM
+#define DUART16552_2_INTNUM	XCHAL_EXTINT5_NUM
+
+#define DUART16552_1_ADDR	IOADDR(0x0d050020)	/* channel 1 */
+#define DUART16552_2_ADDR	IOADDR(0x0d050000)	/* channel 2 */
+
+#define DUART16552_XTAL_FREQ	18432000	/* crystal frequency in Hz */
+#define BASE_BAUD ( DUART16552_XTAL_FREQ / 16 )
+
+#endif /* _XTENSA_XT2000_SERIAL_H */
diff --git a/arch/xtensa/platforms/xt2000/setup.c b/arch/xtensa/platforms/xt2000/setup.c
new file mode 100644
index 000000000..0dc22c371
--- /dev/null
+++ b/arch/xtensa/platforms/xt2000/setup.c
@@ -0,0 +1,150 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * arch/xtensa/platforms/xt2000/setup.c
+ *
+ * Platform specific functions for the XT2000 board.
+ *
+ * Authors:	Chris Zankel <chris@zankel.net>
+ *		Joe Taylor <joe@tensilica.com>
+ *
+ * Copyright 2001 - 2004 Tensilica Inc.
+ */
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/reboot.h>
+#include <linux/kdev_t.h>
+#include <linux/types.h>
+#include <linux/major.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/stringify.h>
+#include <linux/platform_device.h>
+#include <linux/serial.h>
+#include <linux/serial_8250.h>
+
+#include <asm/processor.h>
+#include <asm/platform.h>
+#include <asm/bootparam.h>
+#include <platform/hardware.h>
+#include <platform/serial.h>
+
+/* Assumes s points to an 8-chr string.  No checking for NULL. */
+
+static void led_print (int f, char *s)
+{
+	unsigned long* led_addr = (unsigned long*) (XT2000_LED_ADDR + 0xE0) + f;
+	int i;
+	for (i = f; i < 8; i++)
+		if ((*led_addr++ = *s++) == 0)
+		    break;
+}
+
+void platform_halt(void)
+{
+	led_print (0, "  HALT  ");
+	local_irq_disable();
+	while (1);
+}
+
+void platform_power_off(void)
+{
+	led_print (0, "POWEROFF");
+	local_irq_disable();
+	while (1);
+}
+
+void platform_restart(void)
+{
+	/* Flush and reset the mmu, simulate a processor reset, and
+	 * jump to the reset vector. */
+	cpu_reset();
+	/* control never gets here */
+}
+
+void __init platform_setup(char** cmdline)
+{
+	led_print (0, "LINUX   ");
+}
+
+/* early initialization */
+
+void __init platform_init(bp_tag_t *first)
+{
+}
+
+/* Heartbeat. Let the LED blink. */
+
+void platform_heartbeat(void)
+{
+	static int i, t;
+
+	if (--t < 0)
+	{
+		t = 59;
+		led_print(7, i ? ".": " ");
+		i ^= 1;
+	}
+}
+
+//#define RS_TABLE_SIZE 2
+
+#define _SERIAL_PORT(_base,_irq)					\
+{									\
+	.mapbase	= (_base),					\
+	.membase	= (void*)(_base),				\
+	.irq		= (_irq),					\
+	.uartclk	= DUART16552_XTAL_FREQ,				\
+	.iotype		= UPIO_MEM,					\
+	.flags		= UPF_BOOT_AUTOCONF,				\
+	.regshift	= 2,						\
+}
+
+static struct plat_serial8250_port xt2000_serial_data[] = {
+#if XCHAL_HAVE_BE
+	_SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),
+	_SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),
+#else
+	_SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),
+	_SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),
+#endif
+	{ }
+};
+
+static struct platform_device xt2000_serial8250_device = {
+	.name		= "serial8250",
+	.id		= PLAT8250_DEV_PLATFORM,
+	.dev		= {
+	    .platform_data = xt2000_serial_data,
+	},
+};
+
+static struct resource xt2000_sonic_res[] = {
+	{
+		.start = SONIC83934_ADDR,
+		.end   = SONIC83934_ADDR + 0xff,
+		.flags = IORESOURCE_MEM,
+	},
+	{
+		.start = SONIC83934_INTNUM,
+		.end = SONIC83934_INTNUM,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device xt2000_sonic_device = {
+	.name		= "xtsonic",
+	.num_resources	= ARRAY_SIZE(xt2000_sonic_res),
+	.resource		= xt2000_sonic_res,
+};
+
+static int __init xt2000_setup_devinit(void)
+{
+	platform_device_register(&xt2000_serial8250_device);
+	platform_device_register(&xt2000_sonic_device);
+
+	return 0;
+}
+
+device_initcall(xt2000_setup_devinit);
diff --git a/arch/xtensa/platforms/xtfpga/Makefile b/arch/xtensa/platforms/xtfpga/Makefile
new file mode 100644
index 000000000..0600371b2
--- /dev/null
+++ b/arch/xtensa/platforms/xtfpga/Makefile
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# Makefile for the Tensilica xtavnet Emulation Board
+#
+# Note! Dependencies are done automagically by 'make dep', which also
+# removes any old dependencies. DON'T put your own dependencies here
+# unless it's something special (ie not a .c file).
+#
+# Note 2! The CFLAGS definitions are in the main makefile...
+
+obj-y			+= setup.o
+obj-$(CONFIG_XTFPGA_LCD) += lcd.o
diff --git a/arch/xtensa/platforms/xtfpga/include/platform/hardware.h b/arch/xtensa/platforms/xtfpga/include/platform/hardware.h
new file mode 100644
index 000000000..30d9cb6cf
--- /dev/null
+++ b/arch/xtensa/platforms/xtfpga/include/platform/hardware.h
@@ -0,0 +1,60 @@
+/*
+ * arch/xtensa/platform/xtavnet/include/platform/hardware.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Tensilica Inc.
+ */
+
+/*
+ * This file contains the hardware configuration of the XTAVNET boards.
+ */
+
+#include <asm/types.h>
+
+#ifndef __XTENSA_XTAVNET_HARDWARE_H
+#define __XTENSA_XTAVNET_HARDWARE_H
+
+/* Default assignment of LX60 devices to external interrupts. */
+
+#ifdef CONFIG_XTENSA_MX
+#define DUART16552_INTNUM	XCHAL_EXTINT3_NUM
+#define OETH_IRQ		XCHAL_EXTINT4_NUM
+#define C67X00_IRQ		XCHAL_EXTINT8_NUM
+#else
+#define DUART16552_INTNUM	XCHAL_EXTINT0_NUM
+#define OETH_IRQ		XCHAL_EXTINT1_NUM
+#define C67X00_IRQ		XCHAL_EXTINT5_NUM
+#endif
+
+/*
+ *  Device addresses and parameters.
+ */
+
+/* UART */
+#define DUART16552_PADDR	(XCHAL_KIO_PADDR + 0x0D050020)
+
+/* Misc. */
+#define XTFPGA_FPGAREGS_VADDR	IOADDR(0x0D020000)
+/* Clock frequency in Hz (read-only):  */
+#define XTFPGA_CLKFRQ_VADDR	(XTFPGA_FPGAREGS_VADDR + 0x04)
+/* Setting of 8 DIP switches:  */
+#define DIP_SWITCHES_VADDR	(XTFPGA_FPGAREGS_VADDR + 0x0C)
+/* Software reset (write 0xdead):  */
+#define XTFPGA_SWRST_VADDR	(XTFPGA_FPGAREGS_VADDR + 0x10)
+
+/*  OpenCores Ethernet controller:  */
+				/* regs + RX/TX descriptors */
+#define OETH_REGS_PADDR		(XCHAL_KIO_PADDR + 0x0D030000)
+#define OETH_REGS_SIZE		0x1000
+#define OETH_SRAMBUFF_PADDR	(XCHAL_KIO_PADDR + 0x0D800000)
+
+				/* 5*rx buffs + 5*tx buffs */
+#define OETH_SRAMBUFF_SIZE	(5 * 0x600 + 5 * 0x600)
+
+#define C67X00_PADDR		(XCHAL_KIO_PADDR + 0x0D0D0000)
+#define C67X00_SIZE		0x10
+
+#endif /* __XTENSA_XTAVNET_HARDWARE_H */
diff --git a/arch/xtensa/platforms/xtfpga/include/platform/lcd.h b/arch/xtensa/platforms/xtfpga/include/platform/lcd.h
new file mode 100644
index 000000000..4c8541ed1
--- /dev/null
+++ b/arch/xtensa/platforms/xtfpga/include/platform/lcd.h
@@ -0,0 +1,35 @@
+/*
+ * arch/xtensa/platform/xtavnet/include/platform/lcd.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001, 2006 Tensilica Inc.
+ */
+
+#ifndef __XTENSA_XTAVNET_LCD_H
+#define __XTENSA_XTAVNET_LCD_H
+
+#ifdef CONFIG_XTFPGA_LCD
+/* Display string STR at position POS on the LCD. */
+void lcd_disp_at_pos(char *str, unsigned char pos);
+
+/* Shift the contents of the LCD display left or right. */
+void lcd_shiftleft(void);
+void lcd_shiftright(void);
+#else
+static inline void lcd_disp_at_pos(char *str, unsigned char pos)
+{
+}
+
+static inline void lcd_shiftleft(void)
+{
+}
+
+static inline void lcd_shiftright(void)
+{
+}
+#endif
+
+#endif
diff --git a/arch/xtensa/platforms/xtfpga/include/platform/serial.h b/arch/xtensa/platforms/xtfpga/include/platform/serial.h
new file mode 100644
index 000000000..14d8f7bee
--- /dev/null
+++ b/arch/xtensa/platforms/xtfpga/include/platform/serial.h
@@ -0,0 +1,18 @@
+/*
+ * arch/xtensa/platform/xtavnet/include/platform/serial.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001, 2006 Tensilica Inc.
+ */
+
+#ifndef __ASM_XTENSA_XTAVNET_SERIAL_H
+#define __ASM_XTENSA_XTAVNET_SERIAL_H
+
+#include <platform/hardware.h>
+
+#define BASE_BAUD (*(long *)XTFPGA_CLKFRQ_VADDR / 16)
+
+#endif /* __ASM_XTENSA_XTAVNET_SERIAL_H */
diff --git a/arch/xtensa/platforms/xtfpga/lcd.c b/arch/xtensa/platforms/xtfpga/lcd.c
new file mode 100644
index 000000000..2f7eb66c2
--- /dev/null
+++ b/arch/xtensa/platforms/xtfpga/lcd.c
@@ -0,0 +1,89 @@
+/*
+ * Driver for the LCD display on the Tensilica XTFPGA board family.
+ * http://www.mytechcorp.com/cfdata/productFile/File1/MOC-16216B-B-A0A04.pdf
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001, 2006 Tensilica Inc.
+ * Copyright (C) 2015 Cadence Design Systems Inc.
+ */
+
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/io.h>
+
+#include <platform/hardware.h>
+#include <platform/lcd.h>
+
+/* LCD instruction and data addresses. */
+#define LCD_INSTR_ADDR		((char *)IOADDR(CONFIG_XTFPGA_LCD_BASE_ADDR))
+#define LCD_DATA_ADDR		(LCD_INSTR_ADDR + 4)
+
+#define LCD_CLEAR		0x1
+#define LCD_DISPLAY_ON		0xc
+
+/* 8bit and 2 lines display */
+#define LCD_DISPLAY_MODE8BIT	0x38
+#define LCD_DISPLAY_MODE4BIT	0x28
+#define LCD_DISPLAY_POS		0x80
+#define LCD_SHIFT_LEFT		0x18
+#define LCD_SHIFT_RIGHT		0x1c
+
+static void lcd_put_byte(u8 *addr, u8 data)
+{
+#ifdef CONFIG_XTFPGA_LCD_8BIT_ACCESS
+	WRITE_ONCE(*addr, data);
+#else
+	WRITE_ONCE(*addr, data & 0xf0);
+	WRITE_ONCE(*addr, (data << 4) & 0xf0);
+#endif
+}
+
+static int __init lcd_init(void)
+{
+	WRITE_ONCE(*LCD_INSTR_ADDR, LCD_DISPLAY_MODE8BIT);
+	mdelay(5);
+	WRITE_ONCE(*LCD_INSTR_ADDR, LCD_DISPLAY_MODE8BIT);
+	udelay(200);
+	WRITE_ONCE(*LCD_INSTR_ADDR, LCD_DISPLAY_MODE8BIT);
+	udelay(50);
+#ifndef CONFIG_XTFPGA_LCD_8BIT_ACCESS
+	WRITE_ONCE(*LCD_INSTR_ADDR, LCD_DISPLAY_MODE4BIT);
+	udelay(50);
+	lcd_put_byte(LCD_INSTR_ADDR, LCD_DISPLAY_MODE4BIT);
+	udelay(50);
+#endif
+	lcd_put_byte(LCD_INSTR_ADDR, LCD_DISPLAY_ON);
+	udelay(50);
+	lcd_put_byte(LCD_INSTR_ADDR, LCD_CLEAR);
+	mdelay(10);
+	lcd_disp_at_pos("XTENSA LINUX", 0);
+	return 0;
+}
+
+void lcd_disp_at_pos(char *str, unsigned char pos)
+{
+	lcd_put_byte(LCD_INSTR_ADDR, LCD_DISPLAY_POS | pos);
+	udelay(100);
+	while (*str != 0) {
+		lcd_put_byte(LCD_DATA_ADDR, *str);
+		udelay(200);
+		str++;
+	}
+}
+
+void lcd_shiftleft(void)
+{
+	lcd_put_byte(LCD_INSTR_ADDR, LCD_SHIFT_LEFT);
+	udelay(50);
+}
+
+void lcd_shiftright(void)
+{
+	lcd_put_byte(LCD_INSTR_ADDR, LCD_SHIFT_RIGHT);
+	udelay(50);
+}
+
+arch_initcall(lcd_init);
diff --git a/arch/xtensa/platforms/xtfpga/setup.c b/arch/xtensa/platforms/xtfpga/setup.c
new file mode 100644
index 000000000..c79c1d09e
--- /dev/null
+++ b/arch/xtensa/platforms/xtfpga/setup.c
@@ -0,0 +1,292 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *
+ * arch/xtensa/platform/xtavnet/setup.c
+ *
+ * ...
+ *
+ * Authors:	Chris Zankel <chris@zankel.net>
+ *		Joe Taylor <joe@tensilica.com>
+ *
+ * Copyright 2001 - 2006 Tensilica Inc.
+ */
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/errno.h>
+#include <linux/reboot.h>
+#include <linux/kdev_t.h>
+#include <linux/types.h>
+#include <linux/major.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+#include <linux/clk-provider.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+
+#include <asm/timex.h>
+#include <asm/processor.h>
+#include <asm/platform.h>
+#include <asm/bootparam.h>
+#include <platform/lcd.h>
+#include <platform/hardware.h>
+
+void platform_halt(void)
+{
+	lcd_disp_at_pos(" HALT ", 0);
+	local_irq_disable();
+	while (1)
+		cpu_relax();
+}
+
+void platform_power_off(void)
+{
+	lcd_disp_at_pos("POWEROFF", 0);
+	local_irq_disable();
+	while (1)
+		cpu_relax();
+}
+
+void platform_restart(void)
+{
+	/* Try software reset first. */
+	WRITE_ONCE(*(u32 *)XTFPGA_SWRST_VADDR, 0xdead);
+
+	/* If software reset did not work, flush and reset the mmu,
+	 * simulate a processor reset, and jump to the reset vector.
+	 */
+	cpu_reset();
+	/* control never gets here */
+}
+
+#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
+
+void __init platform_calibrate_ccount(void)
+{
+	ccount_freq = *(long *)XTFPGA_CLKFRQ_VADDR;
+}
+
+#endif
+
+#ifdef CONFIG_USE_OF
+
+static void __init xtfpga_clk_setup(struct device_node *np)
+{
+	void __iomem *base = of_iomap(np, 0);
+	struct clk *clk;
+	u32 freq;
+
+	if (!base) {
+		pr_err("%pOFn: invalid address\n", np);
+		return;
+	}
+
+	freq = __raw_readl(base);
+	iounmap(base);
+	clk = clk_register_fixed_rate(NULL, np->name, NULL, 0, freq);
+
+	if (IS_ERR(clk)) {
+		pr_err("%pOFn: clk registration failed\n", np);
+		return;
+	}
+
+	if (of_clk_add_provider(np, of_clk_src_simple_get, clk)) {
+		pr_err("%pOFn: clk provider registration failed\n", np);
+		return;
+	}
+}
+CLK_OF_DECLARE(xtfpga_clk, "cdns,xtfpga-clock", xtfpga_clk_setup);
+
+#define MAC_LEN 6
+static void __init update_local_mac(struct device_node *node)
+{
+	struct property *newmac;
+	const u8* macaddr;
+	int prop_len;
+
+	macaddr = of_get_property(node, "local-mac-address", &prop_len);
+	if (macaddr == NULL || prop_len != MAC_LEN)
+		return;
+
+	newmac = kzalloc(sizeof(*newmac) + MAC_LEN, GFP_KERNEL);
+	if (newmac == NULL)
+		return;
+
+	newmac->value = newmac + 1;
+	newmac->length = MAC_LEN;
+	newmac->name = kstrdup("local-mac-address", GFP_KERNEL);
+	if (newmac->name == NULL) {
+		kfree(newmac);
+		return;
+	}
+
+	memcpy(newmac->value, macaddr, MAC_LEN);
+	((u8*)newmac->value)[5] = (*(u32*)DIP_SWITCHES_VADDR) & 0x3f;
+	of_update_property(node, newmac);
+}
+
+static int __init machine_setup(void)
+{
+	struct device_node *eth = NULL;
+
+	if ((eth = of_find_compatible_node(eth, NULL, "opencores,ethoc")))
+		update_local_mac(eth);
+	of_node_put(eth);
+	return 0;
+}
+arch_initcall(machine_setup);
+
+#else
+
+#include <linux/serial_8250.h>
+#include <linux/if.h>
+#include <net/ethoc.h>
+#include <linux/usb/c67x00.h>
+
+/*----------------------------------------------------------------------------
+ *  Ethernet -- OpenCores Ethernet MAC (ethoc driver)
+ */
+
+static struct resource ethoc_res[] = {
+	[0] = { /* register space */
+		.start = OETH_REGS_PADDR,
+		.end   = OETH_REGS_PADDR + OETH_REGS_SIZE - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = { /* buffer space */
+		.start = OETH_SRAMBUFF_PADDR,
+		.end   = OETH_SRAMBUFF_PADDR + OETH_SRAMBUFF_SIZE - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[2] = { /* IRQ number */
+		.start = XTENSA_PIC_LINUX_IRQ(OETH_IRQ),
+		.end   = XTENSA_PIC_LINUX_IRQ(OETH_IRQ),
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static struct ethoc_platform_data ethoc_pdata = {
+	/*
+	 * The MAC address for these boards is 00:50:c2:13:6f:xx.
+	 * The last byte (here as zero) is read from the DIP switches on the
+	 * board.
+	 */
+	.hwaddr = { 0x00, 0x50, 0xc2, 0x13, 0x6f, 0 },
+	.phy_id = -1,
+	.big_endian = XCHAL_HAVE_BE,
+};
+
+static struct platform_device ethoc_device = {
+	.name = "ethoc",
+	.id = -1,
+	.num_resources = ARRAY_SIZE(ethoc_res),
+	.resource = ethoc_res,
+	.dev = {
+		.platform_data = &ethoc_pdata,
+	},
+};
+
+/*----------------------------------------------------------------------------
+ *  USB Host/Device -- Cypress CY7C67300
+ */
+
+static struct resource c67x00_res[] = {
+	[0] = { /* register space */
+		.start = C67X00_PADDR,
+		.end   = C67X00_PADDR + C67X00_SIZE - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = { /* IRQ number */
+		.start = XTENSA_PIC_LINUX_IRQ(C67X00_IRQ),
+		.end   = XTENSA_PIC_LINUX_IRQ(C67X00_IRQ),
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static struct c67x00_platform_data c67x00_pdata = {
+	.sie_config = C67X00_SIE1_HOST | C67X00_SIE2_UNUSED,
+	.hpi_regstep = 4,
+};
+
+static struct platform_device c67x00_device = {
+	.name = "c67x00",
+	.id = -1,
+	.num_resources = ARRAY_SIZE(c67x00_res),
+	.resource = c67x00_res,
+	.dev = {
+		.platform_data = &c67x00_pdata,
+	},
+};
+
+/*----------------------------------------------------------------------------
+ *  UART
+ */
+
+static struct resource serial_resource = {
+	.start	= DUART16552_PADDR,
+	.end	= DUART16552_PADDR + 0x1f,
+	.flags	= IORESOURCE_MEM,
+};
+
+static struct plat_serial8250_port serial_platform_data[] = {
+	[0] = {
+		.mapbase	= DUART16552_PADDR,
+		.irq		= XTENSA_PIC_LINUX_IRQ(DUART16552_INTNUM),
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+				  UPF_IOREMAP,
+		.iotype		= XCHAL_HAVE_BE ? UPIO_MEM32BE : UPIO_MEM32,
+		.regshift	= 2,
+		.uartclk	= 0,    /* set in xtavnet_init() */
+	},
+	{ },
+};
+
+static struct platform_device xtavnet_uart = {
+	.name		= "serial8250",
+	.id		= PLAT8250_DEV_PLATFORM,
+	.dev		= {
+		.platform_data	= serial_platform_data,
+	},
+	.num_resources	= 1,
+	.resource	= &serial_resource,
+};
+
+/* platform devices */
+static struct platform_device *platform_devices[] __initdata = {
+	&ethoc_device,
+	&c67x00_device,
+	&xtavnet_uart,
+};
+
+
+static int __init xtavnet_init(void)
+{
+	/* Ethernet MAC address.  */
+	ethoc_pdata.hwaddr[5] = *(u32 *)DIP_SWITCHES_VADDR;
+
+	/* Clock rate varies among FPGA bitstreams; board specific FPGA register
+	 * reports the actual clock rate.
+	 */
+	serial_platform_data[0].uartclk = *(long *)XTFPGA_CLKFRQ_VADDR;
+
+
+	/* register platform devices */
+	platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
+
+	/* ETHOC driver is a bit quiet; at least display Ethernet MAC, so user
+	 * knows whether they set it correctly on the DIP switches.
+	 */
+	pr_info("XTFPGA: Ethernet MAC %pM\n", ethoc_pdata.hwaddr);
+	ethoc_pdata.eth_clkfreq = *(long *)XTFPGA_CLKFRQ_VADDR;
+
+	return 0;
+}
+
+/*
+ * Register to be done during do_initcalls().
+ */
+arch_initcall(xtavnet_init);
+
+#endif /* CONFIG_USE_OF */
diff --git a/arch/xtensa/variants/csp/include/variant/core.h b/arch/xtensa/variants/csp/include/variant/core.h
new file mode 100644
index 000000000..ccd81f07e
--- /dev/null
+++ b/arch/xtensa/variants/csp/include/variant/core.h
@@ -0,0 +1,575 @@
+/* 
+ * xtensa/config/core-isa.h -- HAL definitions that are dependent on Xtensa
+ *				processor CORE configuration
+ *
+ *  See <xtensa/config/core.h>, which includes this file, for more details.
+ */
+
+/* Xtensa processor core configuration information.
+
+   Copyright (c) 1999-2015 Tensilica Inc.
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be included
+   in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _XTENSA_CORE_CONFIGURATION_H
+#define _XTENSA_CORE_CONFIGURATION_H
+
+
+/****************************************************************************
+	    Parameters Useful for Any Code, USER or PRIVILEGED
+ ****************************************************************************/
+
+/*
+ *  Note:  Macros of the form XCHAL_HAVE_*** have a value of 1 if the option is
+ *  configured, and a value of 0 otherwise.  These macros are always defined.
+ */
+
+
+/*----------------------------------------------------------------------
+				ISA
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_BE			0	/* big-endian byte ordering */
+#define XCHAL_HAVE_WINDOWED		1	/* windowed registers option */
+#define XCHAL_NUM_AREGS			32	/* num of physical addr regs */
+#define XCHAL_NUM_AREGS_LOG2		5	/* log2(XCHAL_NUM_AREGS) */
+#define XCHAL_MAX_INSTRUCTION_SIZE	8	/* max instr bytes (3..8) */
+#define XCHAL_HAVE_DEBUG		1	/* debug option */
+#define XCHAL_HAVE_DENSITY		1	/* 16-bit instructions */
+#define XCHAL_HAVE_LOOPS		1	/* zero-overhead loops */
+#define XCHAL_LOOP_BUFFER_SIZE		0	/* zero-ov. loop instr buffer size */
+#define XCHAL_HAVE_NSA			1	/* NSA/NSAU instructions */
+#define XCHAL_HAVE_MINMAX		1	/* MIN/MAX instructions */
+#define XCHAL_HAVE_SEXT			1	/* SEXT instruction */
+#define XCHAL_HAVE_DEPBITS		0	/* DEPBITS instruction */
+#define XCHAL_HAVE_CLAMPS		1	/* CLAMPS instruction */
+#define XCHAL_HAVE_MUL16		1	/* MUL16S/MUL16U instructions */
+#define XCHAL_HAVE_MUL32		1	/* MULL instruction */
+#define XCHAL_HAVE_MUL32_HIGH		1	/* MULUH/MULSH instructions */
+#define XCHAL_HAVE_DIV32		1	/* QUOS/QUOU/REMS/REMU instructions */
+#define XCHAL_HAVE_L32R			1	/* L32R instruction */
+#define XCHAL_HAVE_ABSOLUTE_LITERALS	0	/* non-PC-rel (extended) L32R */
+#define XCHAL_HAVE_CONST16		0	/* CONST16 instruction */
+#define XCHAL_HAVE_ADDX			1	/* ADDX#/SUBX# instructions */
+#define XCHAL_HAVE_WIDE_BRANCHES	0	/* B*.W18 or B*.W15 instr's */
+#define XCHAL_HAVE_PREDICTED_BRANCHES	0	/* B[EQ/EQZ/NE/NEZ]T instr's */
+#define XCHAL_HAVE_CALL4AND12		1	/* (obsolete option) */
+#define XCHAL_HAVE_ABS			1	/* ABS instruction */
+/*#define XCHAL_HAVE_POPC		0*/	/* POPC instruction */
+/*#define XCHAL_HAVE_CRC		0*/	/* CRC instruction */
+#define XCHAL_HAVE_RELEASE_SYNC		1	/* L32AI/S32RI instructions */
+#define XCHAL_HAVE_S32C1I		1	/* S32C1I instruction */
+#define XCHAL_HAVE_SPECULATION		0	/* speculation */
+#define XCHAL_HAVE_FULL_RESET		1	/* all regs/state reset */
+#define XCHAL_NUM_CONTEXTS		1	/* */
+#define XCHAL_NUM_MISC_REGS		4	/* num of scratch regs (0..4) */
+#define XCHAL_HAVE_TAP_MASTER		0	/* JTAG TAP control instr's */
+#define XCHAL_HAVE_PRID			1	/* processor ID register */
+#define XCHAL_HAVE_EXTERN_REGS		1	/* WER/RER instructions */
+#define XCHAL_HAVE_MX			0	/* MX core (Tensilica internal) */
+#define XCHAL_HAVE_MP_INTERRUPTS	0	/* interrupt distributor port */
+#define XCHAL_HAVE_MP_RUNSTALL		0	/* core RunStall control port */
+#define XCHAL_HAVE_PSO			0	/* Power Shut-Off */
+#define XCHAL_HAVE_PSO_CDM		0	/* core/debug/mem pwr domains */
+#define XCHAL_HAVE_PSO_FULL_RETENTION	0	/* all regs preserved on PSO */
+#define XCHAL_HAVE_THREADPTR		1	/* THREADPTR register */
+#define XCHAL_HAVE_BOOLEANS		1	/* boolean registers */
+#define XCHAL_HAVE_CP			1	/* CPENABLE reg (coprocessor) */
+#define XCHAL_CP_MAXCFG			8	/* max allowed cp id plus one */
+#define XCHAL_HAVE_MAC16		1	/* MAC16 package */
+
+#define XCHAL_HAVE_FUSION		 0	/* Fusion*/
+#define XCHAL_HAVE_FUSION_FP	 0	        /* Fusion FP option */
+#define XCHAL_HAVE_FUSION_LOW_POWER 0	/* Fusion Low Power option */
+#define XCHAL_HAVE_FUSION_AES	 0	        /* Fusion BLE/Wifi AES-128 CCM option */
+#define XCHAL_HAVE_FUSION_CONVENC	 0       /* Fusion Conv Encode option */
+#define XCHAL_HAVE_FUSION_LFSR_CRC	 0	/* Fusion LFSR-CRC option */
+#define XCHAL_HAVE_FUSION_BITOPS	 0	/* Fusion Bit Operations Support option */
+#define XCHAL_HAVE_FUSION_AVS	 0	/* Fusion AVS option */
+#define XCHAL_HAVE_FUSION_16BIT_BASEBAND	 0	/* Fusion 16-bit Baseband option */
+#define XCHAL_HAVE_HIFIPRO		0	/* HiFiPro Audio Engine pkg */
+#define XCHAL_HAVE_HIFI4		0	/* HiFi4 Audio Engine pkg */
+#define XCHAL_HAVE_HIFI4_VFPU		0	/* HiFi4 Audio Engine VFPU option */
+#define XCHAL_HAVE_HIFI3		0	/* HiFi3 Audio Engine pkg */
+#define XCHAL_HAVE_HIFI3_VFPU		0	/* HiFi3 Audio Engine VFPU option */
+#define XCHAL_HAVE_HIFI2		0	/* HiFi2 Audio Engine pkg */
+#define XCHAL_HAVE_HIFI2EP		0	/* HiFi2EP */
+#define XCHAL_HAVE_HIFI_MINI		0	
+
+
+#define XCHAL_HAVE_VECTORFPU2005	0	/* vector or user floating-point pkg */
+#define XCHAL_HAVE_USER_DPFPU         0       /* user DP floating-point pkg */
+#define XCHAL_HAVE_USER_SPFPU         0       /* user DP floating-point pkg */
+#define XCHAL_HAVE_FP                 0      /* single prec floating point */
+#define XCHAL_HAVE_FP_DIV             0  /* FP with DIV instructions */
+#define XCHAL_HAVE_FP_RECIP           0        /* FP with RECIP instructions */
+#define XCHAL_HAVE_FP_SQRT            0 /* FP with SQRT instructions */
+#define XCHAL_HAVE_FP_RSQRT           0        /* FP with RSQRT instructions */
+#define XCHAL_HAVE_DFP                        0     /* double precision FP pkg */
+#define XCHAL_HAVE_DFP_DIV            0 /* DFP with DIV instructions */
+#define XCHAL_HAVE_DFP_RECIP          0       /* DFP with RECIP instructions*/
+#define XCHAL_HAVE_DFP_SQRT           0        /* DFP with SQRT instructions */
+#define XCHAL_HAVE_DFP_RSQRT          0       /* DFP with RSQRT instructions*/
+#define XCHAL_HAVE_DFP_ACCEL		0	/* double precision FP acceleration pkg */
+#define XCHAL_HAVE_DFP_accel		XCHAL_HAVE_DFP_ACCEL				/* for backward compatibility */
+
+#define XCHAL_HAVE_DFPU_SINGLE_ONLY    0                 	/* DFPU Coprocessor, single precision only */
+#define XCHAL_HAVE_DFPU_SINGLE_DOUBLE  0               	/* DFPU Coprocessor, single and double precision */
+#define XCHAL_HAVE_VECTRA1		0	/* Vectra I  pkg */
+#define XCHAL_HAVE_VECTRALX		0	/* Vectra LX pkg */
+#define XCHAL_HAVE_PDX4		        0	/* PDX4 */
+#define XCHAL_HAVE_CONNXD2		0	/* ConnX D2 pkg */
+#define XCHAL_HAVE_CONNXD2_DUALLSFLIX   0	/* ConnX D2 & Dual LoadStore Flix */
+#define XCHAL_HAVE_BBE16		0	/* ConnX BBE16 pkg */
+#define XCHAL_HAVE_BBE16_RSQRT		0	/* BBE16 & vector recip sqrt */
+#define XCHAL_HAVE_BBE16_VECDIV		0	/* BBE16 & vector divide */
+#define XCHAL_HAVE_BBE16_DESPREAD	0	/* BBE16 & despread */
+#define XCHAL_HAVE_BBENEP		0	/* ConnX BBENEP pkgs */
+#define XCHAL_HAVE_BSP3			0	/* ConnX BSP3 pkg */
+#define XCHAL_HAVE_BSP3_TRANSPOSE	0	/* BSP3 & transpose32x32 */
+#define XCHAL_HAVE_SSP16		0	/* ConnX SSP16 pkg */
+#define XCHAL_HAVE_SSP16_VITERBI	0	/* SSP16 & viterbi */
+#define XCHAL_HAVE_TURBO16		0	/* ConnX Turbo16 pkg */
+#define XCHAL_HAVE_BBP16		0	/* ConnX BBP16 pkg */
+#define XCHAL_HAVE_FLIX3		0	/* basic 3-way FLIX option */
+#define XCHAL_HAVE_GRIVPEP              0   /*  GRIVPEP is General Release of IVPEP */
+#define XCHAL_HAVE_GRIVPEP_HISTOGRAM    0   /* Histogram option on GRIVPEP */
+
+
+/*----------------------------------------------------------------------
+				MISC
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_LOADSTORE_UNITS	1	/* load/store units */
+#define XCHAL_NUM_WRITEBUFFER_ENTRIES	8	/* size of write buffer */
+#define XCHAL_INST_FETCH_WIDTH		8	/* instr-fetch width in bytes */
+#define XCHAL_DATA_WIDTH		16	/* data width in bytes */
+#define XCHAL_DATA_PIPE_DELAY		1	/* d-side pipeline delay
+						   (1 = 5-stage, 2 = 7-stage) */
+#define XCHAL_CLOCK_GATING_GLOBAL	0	/* global clock gating */
+#define XCHAL_CLOCK_GATING_FUNCUNIT	0	/* funct. unit clock gating */
+/*  In T1050, applies to selected core load and store instructions (see ISA): */
+#define XCHAL_UNALIGNED_LOAD_EXCEPTION	1	/* unaligned loads cause exc. */
+#define XCHAL_UNALIGNED_STORE_EXCEPTION	1	/* unaligned stores cause exc.*/
+#define XCHAL_UNALIGNED_LOAD_HW		0	/* unaligned loads work in hw */
+#define XCHAL_UNALIGNED_STORE_HW	0	/* unaligned stores work in hw*/
+
+#define XCHAL_SW_VERSION		1100002	/* sw version of this header */
+
+#define XCHAL_CORE_ID			"xt_lnx"	/* alphanum core name
+						   (CoreID) set in the Xtensa
+						   Processor Generator */
+
+#define XCHAL_BUILD_UNIQUE_ID		0x00057D54	/* 22-bit sw build ID */
+
+/*
+ *  These definitions describe the hardware targeted by this software.
+ */
+#define XCHAL_HW_CONFIGID0		0xC1B3FFFE	/* ConfigID hi 32 bits*/
+#define XCHAL_HW_CONFIGID1		0x1C857D54	/* ConfigID lo 32 bits*/
+#define XCHAL_HW_VERSION_NAME		"LX6.0.2"	/* full version name */
+#define XCHAL_HW_VERSION_MAJOR		2600	/* major ver# of targeted hw */
+#define XCHAL_HW_VERSION_MINOR		2	/* minor ver# of targeted hw */
+#define XCHAL_HW_VERSION		260002	/* major*100+minor */
+#define XCHAL_HW_REL_LX6		1
+#define XCHAL_HW_REL_LX6_0		1
+#define XCHAL_HW_REL_LX6_0_2		1
+#define XCHAL_HW_CONFIGID_RELIABLE	1
+/*  If software targets a *range* of hardware versions, these are the bounds: */
+#define XCHAL_HW_MIN_VERSION_MAJOR	2600	/* major v of earliest tgt hw */
+#define XCHAL_HW_MIN_VERSION_MINOR	2	/* minor v of earliest tgt hw */
+#define XCHAL_HW_MIN_VERSION		260002	/* earliest targeted hw */
+#define XCHAL_HW_MAX_VERSION_MAJOR	2600	/* major v of latest tgt hw */
+#define XCHAL_HW_MAX_VERSION_MINOR	2	/* minor v of latest tgt hw */
+#define XCHAL_HW_MAX_VERSION		260002	/* latest targeted hw */
+
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_ICACHE_LINESIZE		64	/* I-cache line size in bytes */
+#define XCHAL_DCACHE_LINESIZE		64	/* D-cache line size in bytes */
+#define XCHAL_ICACHE_LINEWIDTH		6	/* log2(I line size in bytes) */
+#define XCHAL_DCACHE_LINEWIDTH		6	/* log2(D line size in bytes) */
+
+#define XCHAL_ICACHE_SIZE		65536	/* I-cache size in bytes or 0 */
+#define XCHAL_DCACHE_SIZE		16384	/* D-cache size in bytes or 0 */
+
+#define XCHAL_DCACHE_IS_WRITEBACK	1	/* writeback feature */
+#define XCHAL_DCACHE_IS_COHERENT	0	/* MP coherence feature */
+
+#define XCHAL_HAVE_PREFETCH		0	/* PREFCTL register */
+#define XCHAL_HAVE_PREFETCH_L1		0	/* prefetch to L1 dcache */
+#define XCHAL_PREFETCH_CASTOUT_LINES	0	/* dcache pref. castout bufsz */
+#define XCHAL_PREFETCH_ENTRIES		0	/* cache prefetch entries */
+#define XCHAL_PREFETCH_BLOCK_ENTRIES	0	/* prefetch block streams */
+#define XCHAL_HAVE_CACHE_BLOCKOPS	0	/* block prefetch for caches */
+#define XCHAL_HAVE_ICACHE_TEST		1	/* Icache test instructions */
+#define XCHAL_HAVE_DCACHE_TEST		1	/* Dcache test instructions */
+#define XCHAL_HAVE_ICACHE_DYN_WAYS	0	/* Icache dynamic way support */
+#define XCHAL_HAVE_DCACHE_DYN_WAYS	0	/* Dcache dynamic way support */
+
+
+
+
+/****************************************************************************
+    Parameters Useful for PRIVILEGED (Supervisory or Non-Virtualized) Code
+ ****************************************************************************/
+
+
+#ifndef XTENSA_HAL_NON_PRIVILEGED_ONLY
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_PIF			1	/* any outbound PIF present */
+
+/*  If present, cache size in bytes == (ways * 2^(linewidth + setwidth)).  */
+
+/*  Number of cache sets in log2(lines per way):  */
+#define XCHAL_ICACHE_SETWIDTH		8
+#define XCHAL_DCACHE_SETWIDTH		6
+
+/*  Cache set associativity (number of ways):  */
+#define XCHAL_ICACHE_WAYS		4
+#define XCHAL_DCACHE_WAYS		4
+
+/*  Cache features:  */
+#define XCHAL_ICACHE_LINE_LOCKABLE	1
+#define XCHAL_DCACHE_LINE_LOCKABLE	1
+#define XCHAL_ICACHE_ECC_PARITY		0
+#define XCHAL_DCACHE_ECC_PARITY		0
+
+/*  Cache access size in bytes (affects operation of SICW instruction):  */
+#define XCHAL_ICACHE_ACCESS_SIZE	16
+#define XCHAL_DCACHE_ACCESS_SIZE	16
+
+#define XCHAL_DCACHE_BANKS		1	/* number of banks */
+
+/*  Number of encoded cache attr bits (see <xtensa/hal.h> for decoded bits):  */
+#define XCHAL_CA_BITS			4
+
+/*  Whether MEMCTL register has anything useful  */
+#define XCHAL_USE_MEMCTL		(((XCHAL_LOOP_BUFFER_SIZE > 0)	||	\
+					   XCHAL_DCACHE_IS_COHERENT	||	\
+					   XCHAL_HAVE_ICACHE_DYN_WAYS	||	\
+					   XCHAL_HAVE_DCACHE_DYN_WAYS)	&&	\
+					   (XCHAL_HW_MIN_VERSION >= XTENSA_HWVERSION_RE_2012_0))
+
+
+/*----------------------------------------------------------------------
+			INTERNAL I/D RAM/ROMs and XLMI
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_INSTROM		0	/* number of core instr. ROMs */
+#define XCHAL_NUM_INSTRAM		0	/* number of core instr. RAMs */
+#define XCHAL_NUM_DATAROM		0	/* number of core data ROMs */
+#define XCHAL_NUM_DATARAM		0	/* number of core data RAMs */
+#define XCHAL_NUM_URAM			0	/* number of core unified RAMs*/
+#define XCHAL_NUM_XLMI			0	/* number of core XLMI ports */
+
+#define XCHAL_HAVE_IMEM_LOADSTORE	1	/* can load/store to IROM/IRAM*/
+
+
+/*----------------------------------------------------------------------
+			INTERRUPTS and TIMERS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_INTERRUPTS		1	/* interrupt option */
+#define XCHAL_HAVE_HIGHPRI_INTERRUPTS	1	/* med/high-pri. interrupts */
+#define XCHAL_HAVE_NMI			1	/* non-maskable interrupt */
+#define XCHAL_HAVE_CCOUNT		1	/* CCOUNT reg. (timer option) */
+#define XCHAL_NUM_TIMERS		3	/* number of CCOMPAREn regs */
+#define XCHAL_NUM_INTERRUPTS		22	/* number of interrupts */
+#define XCHAL_NUM_INTERRUPTS_LOG2	5	/* ceil(log2(NUM_INTERRUPTS)) */
+#define XCHAL_NUM_EXTINTERRUPTS		16	/* num of external interrupts */
+#define XCHAL_NUM_INTLEVELS		6	/* number of interrupt levels
+						   (not including level zero) */
+#define XCHAL_EXCM_LEVEL		3	/* level masked by PS.EXCM */
+	/* (always 1 in XEA1; levels 2 .. EXCM_LEVEL are "medium priority") */
+
+/*  Masks of interrupts at each interrupt level:  */
+#define XCHAL_INTLEVEL1_MASK		0x001F00BF
+#define XCHAL_INTLEVEL2_MASK		0x00001140
+#define XCHAL_INTLEVEL3_MASK		0x00200E00
+#define XCHAL_INTLEVEL4_MASK		0x00008000
+#define XCHAL_INTLEVEL5_MASK		0x00002000
+#define XCHAL_INTLEVEL6_MASK		0x00000000
+#define XCHAL_INTLEVEL7_MASK		0x00004000
+
+/*  Masks of interrupts at each range 1..n of interrupt levels:  */
+#define XCHAL_INTLEVEL1_ANDBELOW_MASK	0x001F00BF
+#define XCHAL_INTLEVEL2_ANDBELOW_MASK	0x001F11FF
+#define XCHAL_INTLEVEL3_ANDBELOW_MASK	0x003F1FFF
+#define XCHAL_INTLEVEL4_ANDBELOW_MASK	0x003F9FFF
+#define XCHAL_INTLEVEL5_ANDBELOW_MASK	0x003FBFFF
+#define XCHAL_INTLEVEL6_ANDBELOW_MASK	0x003FBFFF
+#define XCHAL_INTLEVEL7_ANDBELOW_MASK	0x003FFFFF
+
+/*  Level of each interrupt:  */
+#define XCHAL_INT0_LEVEL		1
+#define XCHAL_INT1_LEVEL		1
+#define XCHAL_INT2_LEVEL		1
+#define XCHAL_INT3_LEVEL		1
+#define XCHAL_INT4_LEVEL		1
+#define XCHAL_INT5_LEVEL		1
+#define XCHAL_INT6_LEVEL		2
+#define XCHAL_INT7_LEVEL		1
+#define XCHAL_INT8_LEVEL		2
+#define XCHAL_INT9_LEVEL		3
+#define XCHAL_INT10_LEVEL		3
+#define XCHAL_INT11_LEVEL		3
+#define XCHAL_INT12_LEVEL		2
+#define XCHAL_INT13_LEVEL		5
+#define XCHAL_INT14_LEVEL		7
+#define XCHAL_INT15_LEVEL		4
+#define XCHAL_INT16_LEVEL		1
+#define XCHAL_INT17_LEVEL		1
+#define XCHAL_INT18_LEVEL		1
+#define XCHAL_INT19_LEVEL		1
+#define XCHAL_INT20_LEVEL		1
+#define XCHAL_INT21_LEVEL		3
+#define XCHAL_DEBUGLEVEL		6	/* debug interrupt level */
+#define XCHAL_HAVE_DEBUG_EXTERN_INT	1	/* OCD external db interrupt */
+#define XCHAL_NMILEVEL			7	/* NMI "level" (for use with
+						   EXCSAVE/EPS/EPC_n, RFI n) */
+
+/*  Type of each interrupt:  */
+#define XCHAL_INT0_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT1_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT2_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT3_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT4_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT5_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT6_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT7_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT8_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT9_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT10_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT11_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT12_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT13_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT14_TYPE 	XTHAL_INTTYPE_NMI
+#define XCHAL_INT15_TYPE 	XTHAL_INTTYPE_PROFILING
+#define XCHAL_INT16_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT17_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT18_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT19_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT20_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT21_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+
+/*  Masks of interrupts for each type of interrupt:  */
+#define XCHAL_INTTYPE_MASK_UNCONFIGURED	0xFFC00000
+#define XCHAL_INTTYPE_MASK_SOFTWARE	0x00000880
+#define XCHAL_INTTYPE_MASK_EXTERN_EDGE	0x003F1000
+#define XCHAL_INTTYPE_MASK_EXTERN_LEVEL	0x0000033F
+#define XCHAL_INTTYPE_MASK_TIMER	0x00002440
+#define XCHAL_INTTYPE_MASK_NMI		0x00004000
+#define XCHAL_INTTYPE_MASK_WRITE_ERROR	0x00000000
+#define XCHAL_INTTYPE_MASK_PROFILING	0x00008000
+
+/*  Interrupt numbers assigned to specific interrupt sources:  */
+#define XCHAL_TIMER0_INTERRUPT		6	/* CCOMPARE0 */
+#define XCHAL_TIMER1_INTERRUPT		10	/* CCOMPARE1 */
+#define XCHAL_TIMER2_INTERRUPT		13	/* CCOMPARE2 */
+#define XCHAL_TIMER3_INTERRUPT		XTHAL_TIMER_UNCONFIGURED
+#define XCHAL_NMI_INTERRUPT		14	/* non-maskable interrupt */
+#define XCHAL_PROFILING_INTERRUPT	15	/* profiling interrupt */
+
+/*  Interrupt numbers for levels at which only one interrupt is configured:  */
+#define XCHAL_INTLEVEL4_NUM		15
+#define XCHAL_INTLEVEL5_NUM		13
+#define XCHAL_INTLEVEL7_NUM		14
+/*  (There are many interrupts each at level(s) 1, 2, 3.)  */
+
+
+/*
+ *  External interrupt mapping.
+ *  These macros describe how Xtensa processor interrupt numbers
+ *  (as numbered internally, eg. in INTERRUPT and INTENABLE registers)
+ *  map to external BInterrupt<n> pins, for those interrupts
+ *  configured as external (level-triggered, edge-triggered, or NMI).
+ *  See the Xtensa processor databook for more details.
+ */
+
+/*  Core interrupt numbers mapped to each EXTERNAL BInterrupt pin number:  */
+#define XCHAL_EXTINT0_NUM		0	/* (intlevel 1) */
+#define XCHAL_EXTINT1_NUM		1	/* (intlevel 1) */
+#define XCHAL_EXTINT2_NUM		2	/* (intlevel 1) */
+#define XCHAL_EXTINT3_NUM		3	/* (intlevel 1) */
+#define XCHAL_EXTINT4_NUM		4	/* (intlevel 1) */
+#define XCHAL_EXTINT5_NUM		5	/* (intlevel 1) */
+#define XCHAL_EXTINT6_NUM		8	/* (intlevel 2) */
+#define XCHAL_EXTINT7_NUM		9	/* (intlevel 3) */
+#define XCHAL_EXTINT8_NUM		12	/* (intlevel 2) */
+#define XCHAL_EXTINT9_NUM		14	/* (intlevel 7) */
+#define XCHAL_EXTINT10_NUM		16	/* (intlevel 1) */
+#define XCHAL_EXTINT11_NUM		17	/* (intlevel 1) */
+#define XCHAL_EXTINT12_NUM		18	/* (intlevel 1) */
+#define XCHAL_EXTINT13_NUM		19	/* (intlevel 1) */
+#define XCHAL_EXTINT14_NUM		20	/* (intlevel 1) */
+#define XCHAL_EXTINT15_NUM		21	/* (intlevel 3) */
+/*  EXTERNAL BInterrupt pin numbers mapped to each core interrupt number:  */
+#define XCHAL_INT0_EXTNUM		0	/* (intlevel 1) */
+#define XCHAL_INT1_EXTNUM		1	/* (intlevel 1) */
+#define XCHAL_INT2_EXTNUM		2	/* (intlevel 1) */
+#define XCHAL_INT3_EXTNUM		3	/* (intlevel 1) */
+#define XCHAL_INT4_EXTNUM		4	/* (intlevel 1) */
+#define XCHAL_INT5_EXTNUM		5	/* (intlevel 1) */
+#define XCHAL_INT8_EXTNUM		6	/* (intlevel 2) */
+#define XCHAL_INT9_EXTNUM		7	/* (intlevel 3) */
+#define XCHAL_INT12_EXTNUM		8	/* (intlevel 2) */
+#define XCHAL_INT14_EXTNUM		9	/* (intlevel 7) */
+#define XCHAL_INT16_EXTNUM		10	/* (intlevel 1) */
+#define XCHAL_INT17_EXTNUM		11	/* (intlevel 1) */
+#define XCHAL_INT18_EXTNUM		12	/* (intlevel 1) */
+#define XCHAL_INT19_EXTNUM		13	/* (intlevel 1) */
+#define XCHAL_INT20_EXTNUM		14	/* (intlevel 1) */
+#define XCHAL_INT21_EXTNUM		15	/* (intlevel 3) */
+
+
+/*----------------------------------------------------------------------
+			EXCEPTIONS and VECTORS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_XEA_VERSION		2	/* Xtensa Exception Architecture
+						   number: 1 == XEA1 (old)
+							   2 == XEA2 (new)
+							   0 == XEAX (extern) or TX */
+#define XCHAL_HAVE_XEA1			0	/* Exception Architecture 1 */
+#define XCHAL_HAVE_XEA2			1	/* Exception Architecture 2 */
+#define XCHAL_HAVE_XEAX			0	/* External Exception Arch. */
+#define XCHAL_HAVE_EXCEPTIONS		1	/* exception option */
+#define XCHAL_HAVE_HALT			0	/* halt architecture option */
+#define XCHAL_HAVE_BOOTLOADER		0	/* boot loader (for TX) */
+#define XCHAL_HAVE_MEM_ECC_PARITY	0	/* local memory ECC/parity */
+#define XCHAL_HAVE_VECTOR_SELECT	1	/* relocatable vectors */
+#define XCHAL_HAVE_VECBASE		1	/* relocatable vectors */
+#define XCHAL_VECBASE_RESET_VADDR	0x00002000  /* VECBASE reset value */
+#define XCHAL_VECBASE_RESET_PADDR	0x00002000
+#define XCHAL_RESET_VECBASE_OVERLAP	0
+
+#define XCHAL_RESET_VECTOR0_VADDR	0xFE000000
+#define XCHAL_RESET_VECTOR0_PADDR	0xFE000000
+#define XCHAL_RESET_VECTOR1_VADDR	0x00001000
+#define XCHAL_RESET_VECTOR1_PADDR	0x00001000
+#define XCHAL_RESET_VECTOR_VADDR	0xFE000000
+#define XCHAL_RESET_VECTOR_PADDR	0xFE000000
+#define XCHAL_USER_VECOFS		0x00000340
+#define XCHAL_USER_VECTOR_VADDR		0x00002340
+#define XCHAL_USER_VECTOR_PADDR		0x00002340
+#define XCHAL_KERNEL_VECOFS		0x00000300
+#define XCHAL_KERNEL_VECTOR_VADDR	0x00002300
+#define XCHAL_KERNEL_VECTOR_PADDR	0x00002300
+#define XCHAL_DOUBLEEXC_VECOFS		0x000003C0
+#define XCHAL_DOUBLEEXC_VECTOR_VADDR	0x000023C0
+#define XCHAL_DOUBLEEXC_VECTOR_PADDR	0x000023C0
+#define XCHAL_WINDOW_OF4_VECOFS		0x00000000
+#define XCHAL_WINDOW_UF4_VECOFS		0x00000040
+#define XCHAL_WINDOW_OF8_VECOFS		0x00000080
+#define XCHAL_WINDOW_UF8_VECOFS		0x000000C0
+#define XCHAL_WINDOW_OF12_VECOFS	0x00000100
+#define XCHAL_WINDOW_UF12_VECOFS	0x00000140
+#define XCHAL_WINDOW_VECTORS_VADDR	0x00002000
+#define XCHAL_WINDOW_VECTORS_PADDR	0x00002000
+#define XCHAL_INTLEVEL2_VECOFS		0x00000180
+#define XCHAL_INTLEVEL2_VECTOR_VADDR	0x00002180
+#define XCHAL_INTLEVEL2_VECTOR_PADDR	0x00002180
+#define XCHAL_INTLEVEL3_VECOFS		0x000001C0
+#define XCHAL_INTLEVEL3_VECTOR_VADDR	0x000021C0
+#define XCHAL_INTLEVEL3_VECTOR_PADDR	0x000021C0
+#define XCHAL_INTLEVEL4_VECOFS		0x00000200
+#define XCHAL_INTLEVEL4_VECTOR_VADDR	0x00002200
+#define XCHAL_INTLEVEL4_VECTOR_PADDR	0x00002200
+#define XCHAL_INTLEVEL5_VECOFS		0x00000240
+#define XCHAL_INTLEVEL5_VECTOR_VADDR	0x00002240
+#define XCHAL_INTLEVEL5_VECTOR_PADDR	0x00002240
+#define XCHAL_INTLEVEL6_VECOFS		0x00000280
+#define XCHAL_INTLEVEL6_VECTOR_VADDR	0x00002280
+#define XCHAL_INTLEVEL6_VECTOR_PADDR	0x00002280
+#define XCHAL_DEBUG_VECOFS		XCHAL_INTLEVEL6_VECOFS
+#define XCHAL_DEBUG_VECTOR_VADDR	XCHAL_INTLEVEL6_VECTOR_VADDR
+#define XCHAL_DEBUG_VECTOR_PADDR	XCHAL_INTLEVEL6_VECTOR_PADDR
+#define XCHAL_NMI_VECOFS		0x000002C0
+#define XCHAL_NMI_VECTOR_VADDR		0x000022C0
+#define XCHAL_NMI_VECTOR_PADDR		0x000022C0
+#define XCHAL_INTLEVEL7_VECOFS		XCHAL_NMI_VECOFS
+#define XCHAL_INTLEVEL7_VECTOR_VADDR	XCHAL_NMI_VECTOR_VADDR
+#define XCHAL_INTLEVEL7_VECTOR_PADDR	XCHAL_NMI_VECTOR_PADDR
+
+
+/*----------------------------------------------------------------------
+				DEBUG MODULE
+  ----------------------------------------------------------------------*/
+
+/*  Misc  */
+#define XCHAL_HAVE_DEBUG_ERI		1	/* ERI to debug module */
+#define XCHAL_HAVE_DEBUG_APB		1	/* APB to debug module */
+#define XCHAL_HAVE_DEBUG_JTAG		1	/* JTAG to debug module */
+
+/*  On-Chip Debug (OCD)  */
+#define XCHAL_HAVE_OCD			1	/* OnChipDebug option */
+#define XCHAL_NUM_IBREAK		2	/* number of IBREAKn regs */
+#define XCHAL_NUM_DBREAK		2	/* number of DBREAKn regs */
+#define XCHAL_HAVE_OCD_DIR_ARRAY	0	/* faster OCD option (to LX4) */
+#define XCHAL_HAVE_OCD_LS32DDR		1	/* L32DDR/S32DDR (faster OCD) */
+
+/*  TRAX (in core)  */
+#define XCHAL_HAVE_TRAX			1	/* TRAX in debug module */
+#define XCHAL_TRAX_MEM_SIZE		262144	/* TRAX memory size in bytes */
+#define XCHAL_TRAX_MEM_SHAREABLE	1	/* start/end regs; ready sig. */
+#define XCHAL_TRAX_ATB_WIDTH		0	/* ATB width (bits), 0=no ATB */
+#define XCHAL_TRAX_TIME_WIDTH		0	/* timestamp bitwidth, 0=none */
+
+/*  Perf counters  */
+#define XCHAL_NUM_PERF_COUNTERS		8	/* performance counters */
+
+
+/*----------------------------------------------------------------------
+				MMU
+  ----------------------------------------------------------------------*/
+
+/*  See core-matmap.h header file for more details.  */
+
+#define XCHAL_HAVE_TLBS			1	/* inverse of HAVE_CACHEATTR */
+#define XCHAL_HAVE_SPANNING_WAY		1	/* one way maps I+D 4GB vaddr */
+#define XCHAL_SPANNING_WAY		6	/* TLB spanning way number */
+#define XCHAL_HAVE_IDENTITY_MAP		0	/* vaddr == paddr always */
+#define XCHAL_HAVE_CACHEATTR		0	/* CACHEATTR register present */
+#define XCHAL_HAVE_MIMIC_CACHEATTR	0	/* region protection */
+#define XCHAL_HAVE_XLT_CACHEATTR	0	/* region prot. w/translation */
+#define XCHAL_HAVE_PTP_MMU		1	/* full MMU (with page table
+						   [autorefill] and protection)
+						   usable for an MMU-based OS */
+/*  If none of the above last 4 are set, it's a custom TLB configuration.  */
+#define XCHAL_ITLB_ARF_ENTRIES_LOG2	2	/* log2(autorefill way size) */
+#define XCHAL_DTLB_ARF_ENTRIES_LOG2	2	/* log2(autorefill way size) */
+
+#define XCHAL_MMU_ASID_BITS		8	/* number of bits in ASIDs */
+#define XCHAL_MMU_RINGS			4	/* number of rings (1..4) */
+#define XCHAL_MMU_RING_BITS		2	/* num of bits in RING field */
+
+#endif /* !XTENSA_HAL_NON_PRIVILEGED_ONLY */
+
+
+#endif /* _XTENSA_CORE_CONFIGURATION_H */
+
diff --git a/arch/xtensa/variants/csp/include/variant/tie-asm.h b/arch/xtensa/variants/csp/include/variant/tie-asm.h
new file mode 100644
index 000000000..ba773c4a2
--- /dev/null
+++ b/arch/xtensa/variants/csp/include/variant/tie-asm.h
@@ -0,0 +1,194 @@
+/* 
+ * tie-asm.h -- compile-time HAL assembler definitions dependent on CORE & TIE
+ *
+ *  NOTE:  This header file is not meant to be included directly.
+ */
+
+/* This header file contains assembly-language definitions (assembly
+   macros, etc.) for this specific Xtensa processor's TIE extensions
+   and options.  It is customized to this Xtensa processor configuration.
+
+   Copyright (c) 1999-2015 Cadence Design Systems Inc.
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be included
+   in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _XTENSA_CORE_TIE_ASM_H
+#define _XTENSA_CORE_TIE_ASM_H
+
+/*  Selection parameter values for save-area save/restore macros:  */
+/*  Option vs. TIE:  */
+#define XTHAL_SAS_TIE	0x0001	/* custom extension or coprocessor */
+#define XTHAL_SAS_OPT	0x0002	/* optional (and not a coprocessor) */
+#define XTHAL_SAS_ANYOT	0x0003	/* both of the above */
+/*  Whether used automatically by compiler:  */
+#define XTHAL_SAS_NOCC	0x0004	/* not used by compiler w/o special opts/code */
+#define XTHAL_SAS_CC	0x0008	/* used by compiler without special opts/code */
+#define XTHAL_SAS_ANYCC	0x000C	/* both of the above */
+/*  ABI handling across function calls:  */
+#define XTHAL_SAS_CALR	0x0010	/* caller-saved */
+#define XTHAL_SAS_CALE	0x0020	/* callee-saved */
+#define XTHAL_SAS_GLOB	0x0040	/* global across function calls (in thread) */
+#define XTHAL_SAS_ANYABI	0x0070	/* all of the above three */
+/*  Misc  */
+#define XTHAL_SAS_ALL	0xFFFF	/* include all default NCP contents */
+#define XTHAL_SAS3(optie,ccuse,abi)	( ((optie) & XTHAL_SAS_ANYOT)  \
+					| ((ccuse) & XTHAL_SAS_ANYCC)  \
+					| ((abi)   & XTHAL_SAS_ANYABI) )
+
+
+    /*
+      *  Macro to store all non-coprocessor (extra) custom TIE and optional state
+      *  (not including zero-overhead loop registers).
+      *  Required parameters:
+      *      ptr         Save area pointer address register (clobbered)
+      *                  (register must contain a 4 byte aligned address).
+      *      at1..at4    Four temporary address registers (first XCHAL_NCP_NUM_ATMPS
+      *                  registers are clobbered, the remaining are unused).
+      *  Optional parameters:
+      *      continue    If macro invoked as part of a larger store sequence, set to 1
+      *                  if this is not the first in the sequence.  Defaults to 0.
+      *      ofs         Offset from start of larger sequence (from value of first ptr
+      *                  in sequence) at which to store.  Defaults to next available space
+      *                  (or 0 if <continue> is 0).
+      *      select      Select what category(ies) of registers to store, as a bitmask
+      *                  (see XTHAL_SAS_xxx constants).  Defaults to all registers.
+      *      alloc       Select what category(ies) of registers to allocate; if any
+      *                  category is selected here that is not in <select>, space for
+      *                  the corresponding registers is skipped without doing any store.
+      */
+    .macro xchal_ncp_store  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
+	xchal_sa_start	\continue, \ofs
+	// Optional global registers used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1020, 4, 4
+	rur.THREADPTR	\at1		// threadptr option
+	s32i	\at1, \ptr, .Lxchal_ofs_+0
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1020, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	// Optional caller-saved registers used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	rsr.ACCLO	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+0
+	rsr.ACCHI	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.endif
+	// Optional caller-saved registers not used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1000, 4, 4
+	rsr.BR	\at1		// boolean option
+	s32i	\at1, \ptr, .Lxchal_ofs_+0
+	rsr.SCOMPARE1	\at1		// conditional store option
+	s32i	\at1, \ptr, .Lxchal_ofs_+4
+	rsr.M0	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+8
+	rsr.M1	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+12
+	rsr.M2	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+16
+	rsr.M3	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+20
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 24
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1000, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 24
+	.endif
+    .endm	// xchal_ncp_store
+
+    /*
+      *  Macro to load all non-coprocessor (extra) custom TIE and optional state
+      *  (not including zero-overhead loop registers).
+      *  Required parameters:
+      *      ptr         Save area pointer address register (clobbered)
+      *                  (register must contain a 4 byte aligned address).
+      *      at1..at4    Four temporary address registers (first XCHAL_NCP_NUM_ATMPS
+      *                  registers are clobbered, the remaining are unused).
+      *  Optional parameters:
+      *      continue    If macro invoked as part of a larger load sequence, set to 1
+      *                  if this is not the first in the sequence.  Defaults to 0.
+      *      ofs         Offset from start of larger sequence (from value of first ptr
+      *                  in sequence) at which to load.  Defaults to next available space
+      *                  (or 0 if <continue> is 0).
+      *      select      Select what category(ies) of registers to load, as a bitmask
+      *                  (see XTHAL_SAS_xxx constants).  Defaults to all registers.
+      *      alloc       Select what category(ies) of registers to allocate; if any
+      *                  category is selected here that is not in <select>, space for
+      *                  the corresponding registers is skipped without doing any load.
+      */
+    .macro xchal_ncp_load  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
+	xchal_sa_start	\continue, \ofs
+	// Optional global registers used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1020, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_+0
+	wur.THREADPTR	\at1		// threadptr option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1020, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	// Optional caller-saved registers used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_+0
+	wsr.ACCLO	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+4
+	wsr.ACCHI	\at1		// MAC16 option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.endif
+	// Optional caller-saved registers not used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1000, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_+0
+	wsr.BR	\at1		// boolean option
+	l32i	\at1, \ptr, .Lxchal_ofs_+4
+	wsr.SCOMPARE1	\at1		// conditional store option
+	l32i	\at1, \ptr, .Lxchal_ofs_+8
+	wsr.M0	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+12
+	wsr.M1	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+16
+	wsr.M2	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+20
+	wsr.M3	\at1		// MAC16 option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 24
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1000, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 24
+	.endif
+    .endm	// xchal_ncp_load
+
+
+#define XCHAL_NCP_NUM_ATMPS	1
+
+#define XCHAL_SA_NUM_ATMPS	1
+
+#endif /*_XTENSA_CORE_TIE_ASM_H*/
+
diff --git a/arch/xtensa/variants/csp/include/variant/tie.h b/arch/xtensa/variants/csp/include/variant/tie.h
new file mode 100644
index 000000000..3ce391cfe
--- /dev/null
+++ b/arch/xtensa/variants/csp/include/variant/tie.h
@@ -0,0 +1,161 @@
+/* 
+ * tie.h -- compile-time HAL definitions dependent on CORE & TIE configuration
+ *
+ *  NOTE:  This header file is not meant to be included directly.
+ */
+
+/* This header file describes this specific Xtensa processor's TIE extensions
+   that extend basic Xtensa core functionality.  It is customized to this
+   Xtensa processor configuration.
+
+   Copyright (c) 1999-2015 Cadence Design Systems Inc.
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be included
+   in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _XTENSA_CORE_TIE_H
+#define _XTENSA_CORE_TIE_H
+
+#define XCHAL_CP_NUM			1	/* number of coprocessors */
+#define XCHAL_CP_MAX			8	/* max CP ID + 1 (0 if none) */
+#define XCHAL_CP_MASK			0x80	/* bitmask of all CPs by ID */
+#define XCHAL_CP_PORT_MASK		0x80	/* bitmask of only port CPs */
+
+/*  Basic parameters of each coprocessor:  */
+#define XCHAL_CP7_NAME			"XTIOP"
+#define XCHAL_CP7_IDENT			XTIOP
+#define XCHAL_CP7_SA_SIZE		0	/* size of state save area */
+#define XCHAL_CP7_SA_ALIGN		1	/* min alignment of save area */
+#define XCHAL_CP_ID_XTIOP           	7	/* coprocessor ID (0..7) */
+
+/*  Filler info for unassigned coprocessors, to simplify arrays etc:  */
+#define XCHAL_CP0_SA_SIZE		0
+#define XCHAL_CP0_SA_ALIGN		1
+#define XCHAL_CP1_SA_SIZE		0
+#define XCHAL_CP1_SA_ALIGN		1
+#define XCHAL_CP2_SA_SIZE		0
+#define XCHAL_CP2_SA_ALIGN		1
+#define XCHAL_CP3_SA_SIZE		0
+#define XCHAL_CP3_SA_ALIGN		1
+#define XCHAL_CP4_SA_SIZE		0
+#define XCHAL_CP4_SA_ALIGN		1
+#define XCHAL_CP5_SA_SIZE		0
+#define XCHAL_CP5_SA_ALIGN		1
+#define XCHAL_CP6_SA_SIZE		0
+#define XCHAL_CP6_SA_ALIGN		1
+
+/*  Save area for non-coprocessor optional and custom (TIE) state:  */
+#define XCHAL_NCP_SA_SIZE		36
+#define XCHAL_NCP_SA_ALIGN		4
+
+/*  Total save area for optional and custom state (NCP + CPn):  */
+#define XCHAL_TOTAL_SA_SIZE		48	/* with 16-byte align padding */
+#define XCHAL_TOTAL_SA_ALIGN		4	/* actual minimum alignment */
+
+/*
+ * Detailed contents of save areas.
+ * NOTE:  caller must define the XCHAL_SA_REG macro (not defined here)
+ * before expanding the XCHAL_xxx_SA_LIST() macros.
+ *
+ * XCHAL_SA_REG(s,ccused,abikind,kind,opt,name,galign,align,asize,
+ *		dbnum,base,regnum,bitsz,gapsz,reset,x...)
+ *
+ *	s = passed from XCHAL_*_LIST(s), eg. to select how to expand
+ *	ccused = set if used by compiler without special options or code
+ *	abikind = 0 (caller-saved), 1 (callee-saved), or 2 (thread-global)
+ *	kind = 0 (special reg), 1 (TIE user reg), or 2 (TIE regfile reg)
+ *	opt = 0 (custom TIE extension or coprocessor), or 1 (optional reg)
+ *	name = lowercase reg name (no quotes)
+ *	galign = group byte alignment (power of 2) (galign >= align)
+ *	align = register byte alignment (power of 2)
+ *	asize = allocated size in bytes (asize*8 == bitsz + gapsz + padsz)
+ *	  (not including any pad bytes required to galign this or next reg)
+ *	dbnum = unique target number f/debug (see <xtensa-libdb-macros.h>)
+ *	base = reg shortname w/o index (or sr=special, ur=TIE user reg)
+ *	regnum = reg index in regfile, or special/TIE-user reg number
+ *	bitsz = number of significant bits (regfile width, or ur/sr mask bits)
+ *	gapsz = intervening bits, if bitsz bits not stored contiguously
+ *	(padsz = pad bits at end [TIE regfile] or at msbits [ur,sr] of asize)
+ *	reset = register reset value (or 0 if undefined at reset)
+ *	x = reserved for future use (0 until then)
+ *
+ *  To filter out certain registers, e.g. to expand only the non-global
+ *  registers used by the compiler, you can do something like this:
+ *
+ *  #define XCHAL_SA_REG(s,ccused,p...)	SELCC##ccused(p)
+ *  #define SELCC0(p...)
+ *  #define SELCC1(abikind,p...)	SELAK##abikind(p)
+ *  #define SELAK0(p...)		REG(p)
+ *  #define SELAK1(p...)		REG(p)
+ *  #define SELAK2(p...)
+ *  #define REG(kind,tie,name,galn,aln,asz,csz,dbnum,base,rnum,bsz,rst,x...) \
+ *		...what you want to expand...
+ */
+
+#define XCHAL_NCP_SA_NUM	9
+#define XCHAL_NCP_SA_LIST(s)	\
+ XCHAL_SA_REG(s,1,2,1,1,      threadptr, 4, 4, 4,0x03E7,  ur,231, 32,0,0,0) \
+ XCHAL_SA_REG(s,1,0,0,1,          acclo, 4, 4, 4,0x0210,  sr,16 , 32,0,0,0) \
+ XCHAL_SA_REG(s,1,0,0,1,          acchi, 4, 4, 4,0x0211,  sr,17 ,  8,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             br, 4, 4, 4,0x0204,  sr,4  , 16,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,      scompare1, 4, 4, 4,0x020C,  sr,12 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m0, 4, 4, 4,0x0220,  sr,32 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m1, 4, 4, 4,0x0221,  sr,33 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m2, 4, 4, 4,0x0222,  sr,34 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m3, 4, 4, 4,0x0223,  sr,35 , 32,0,0,0)
+
+#define XCHAL_CP0_SA_NUM	0
+#define XCHAL_CP0_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP1_SA_NUM	0
+#define XCHAL_CP1_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP2_SA_NUM	0
+#define XCHAL_CP2_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP3_SA_NUM	0
+#define XCHAL_CP3_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP4_SA_NUM	0
+#define XCHAL_CP4_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP5_SA_NUM	0
+#define XCHAL_CP5_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP6_SA_NUM	0
+#define XCHAL_CP6_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP7_SA_NUM	0
+#define XCHAL_CP7_SA_LIST(s)	/* empty */
+
+/* Byte length of instruction from its first nibble (op0 field), per FLIX.  */
+#define XCHAL_OP0_FORMAT_LENGTHS	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3
+/* Byte length of instruction from its first byte, per FLIX.  */
+#define XCHAL_BYTE0_FORMAT_LENGTHS	\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3
+
+#endif /*_XTENSA_CORE_TIE_H*/
+
diff --git a/arch/xtensa/variants/dc232b/include/variant/core.h b/arch/xtensa/variants/dc232b/include/variant/core.h
new file mode 100644
index 000000000..525bd3d90
--- /dev/null
+++ b/arch/xtensa/variants/dc232b/include/variant/core.h
@@ -0,0 +1,424 @@
+/*
+ * Xtensa processor core configuration information.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 1999-2007 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_CORE_CONFIGURATION_H
+#define _XTENSA_CORE_CONFIGURATION_H
+
+
+/****************************************************************************
+	    Parameters Useful for Any Code, USER or PRIVILEGED
+ ****************************************************************************/
+
+/*
+ *  Note:  Macros of the form XCHAL_HAVE_*** have a value of 1 if the option is
+ *  configured, and a value of 0 otherwise.  These macros are always defined.
+ */
+
+
+/*----------------------------------------------------------------------
+				ISA
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_BE			0	/* big-endian byte ordering */
+#define XCHAL_HAVE_WINDOWED		1	/* windowed registers option */
+#define XCHAL_NUM_AREGS			32	/* num of physical addr regs */
+#define XCHAL_NUM_AREGS_LOG2		5	/* log2(XCHAL_NUM_AREGS) */
+#define XCHAL_MAX_INSTRUCTION_SIZE	3	/* max instr bytes (3..8) */
+#define XCHAL_HAVE_DEBUG		1	/* debug option */
+#define XCHAL_HAVE_DENSITY		1	/* 16-bit instructions */
+#define XCHAL_HAVE_LOOPS		1	/* zero-overhead loops */
+#define XCHAL_HAVE_NSA			1	/* NSA/NSAU instructions */
+#define XCHAL_HAVE_MINMAX		1	/* MIN/MAX instructions */
+#define XCHAL_HAVE_SEXT			1	/* SEXT instruction */
+#define XCHAL_HAVE_CLAMPS		1	/* CLAMPS instruction */
+#define XCHAL_HAVE_MUL16		1	/* MUL16S/MUL16U instructions */
+#define XCHAL_HAVE_MUL32		1	/* MULL instruction */
+#define XCHAL_HAVE_MUL32_HIGH		0	/* MULUH/MULSH instructions */
+#define XCHAL_HAVE_DIV32		1	/* QUOS/QUOU/REMS/REMU instructions */
+#define XCHAL_HAVE_L32R			1	/* L32R instruction */
+#define XCHAL_HAVE_ABSOLUTE_LITERALS	1	/* non-PC-rel (extended) L32R */
+#define XCHAL_HAVE_CONST16		0	/* CONST16 instruction */
+#define XCHAL_HAVE_ADDX			1	/* ADDX#/SUBX# instructions */
+#define XCHAL_HAVE_WIDE_BRANCHES	0	/* B*.W18 or B*.W15 instr's */
+#define XCHAL_HAVE_PREDICTED_BRANCHES	0	/* B[EQ/EQZ/NE/NEZ]T instr's */
+#define XCHAL_HAVE_CALL4AND12		1	/* (obsolete option) */
+#define XCHAL_HAVE_ABS			1	/* ABS instruction */
+/*#define XCHAL_HAVE_POPC		0*/	/* POPC instruction */
+/*#define XCHAL_HAVE_CRC		0*/	/* CRC instruction */
+#define XCHAL_HAVE_RELEASE_SYNC		1	/* L32AI/S32RI instructions */
+#define XCHAL_HAVE_S32C1I		1	/* S32C1I instruction */
+#define XCHAL_HAVE_SPECULATION		0	/* speculation */
+#define XCHAL_HAVE_FULL_RESET		1	/* all regs/state reset */
+#define XCHAL_NUM_CONTEXTS		1	/* */
+#define XCHAL_NUM_MISC_REGS		2	/* num of scratch regs (0..4) */
+#define XCHAL_HAVE_TAP_MASTER		0	/* JTAG TAP control instr's */
+#define XCHAL_HAVE_PRID			1	/* processor ID register */
+#define XCHAL_HAVE_THREADPTR		1	/* THREADPTR register */
+#define XCHAL_HAVE_BOOLEANS		0	/* boolean registers */
+#define XCHAL_HAVE_CP			1	/* CPENABLE reg (coprocessor) */
+#define XCHAL_CP_MAXCFG			8	/* max allowed cp id plus one */
+#define XCHAL_HAVE_MAC16		1	/* MAC16 package */
+#define XCHAL_HAVE_VECTORFPU2005	0	/* vector floating-point pkg */
+#define XCHAL_HAVE_FP			0	/* floating point pkg */
+#define XCHAL_HAVE_VECTRA1		0	/* Vectra I  pkg */
+#define XCHAL_HAVE_VECTRALX		0	/* Vectra LX pkg */
+#define XCHAL_HAVE_HIFI2		0	/* HiFi2 Audio Engine pkg */
+
+
+/*----------------------------------------------------------------------
+				MISC
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_WRITEBUFFER_ENTRIES	8	/* size of write buffer */
+#define XCHAL_INST_FETCH_WIDTH		4	/* instr-fetch width in bytes */
+#define XCHAL_DATA_WIDTH		4	/* data width in bytes */
+/*  In T1050, applies to selected core load and store instructions (see ISA): */
+#define XCHAL_UNALIGNED_LOAD_EXCEPTION	1	/* unaligned loads cause exc. */
+#define XCHAL_UNALIGNED_STORE_EXCEPTION	1	/* unaligned stores cause exc.*/
+
+#define XCHAL_SW_VERSION		701001	/* sw version of this header */
+
+#define XCHAL_CORE_ID			"dc232b"	/* alphanum core name
+						   (CoreID) set in the Xtensa
+						   Processor Generator */
+
+#define XCHAL_CORE_DESCRIPTION		"Diamond 232L Standard Core Rev.B (LE)"
+#define XCHAL_BUILD_UNIQUE_ID		0x0000BEEF	/* 22-bit sw build ID */
+
+/*
+ *  These definitions describe the hardware targeted by this software.
+ */
+#define XCHAL_HW_CONFIGID0		0xC56307FE	/* ConfigID hi 32 bits*/
+#define XCHAL_HW_CONFIGID1		0x0D40BEEF	/* ConfigID lo 32 bits*/
+#define XCHAL_HW_VERSION_NAME		"LX2.1.1"	/* full version name */
+#define XCHAL_HW_VERSION_MAJOR		2210	/* major ver# of targeted hw */
+#define XCHAL_HW_VERSION_MINOR		1	/* minor ver# of targeted hw */
+#define XCHAL_HW_VERSION		221001	/* major*100+minor */
+#define XCHAL_HW_REL_LX2		1
+#define XCHAL_HW_REL_LX2_1		1
+#define XCHAL_HW_REL_LX2_1_1		1
+#define XCHAL_HW_CONFIGID_RELIABLE	1
+/*  If software targets a *range* of hardware versions, these are the bounds: */
+#define XCHAL_HW_MIN_VERSION_MAJOR	2210	/* major v of earliest tgt hw */
+#define XCHAL_HW_MIN_VERSION_MINOR	1	/* minor v of earliest tgt hw */
+#define XCHAL_HW_MIN_VERSION		221001	/* earliest targeted hw */
+#define XCHAL_HW_MAX_VERSION_MAJOR	2210	/* major v of latest tgt hw */
+#define XCHAL_HW_MAX_VERSION_MINOR	1	/* minor v of latest tgt hw */
+#define XCHAL_HW_MAX_VERSION		221001	/* latest targeted hw */
+
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_ICACHE_LINESIZE		32	/* I-cache line size in bytes */
+#define XCHAL_DCACHE_LINESIZE		32	/* D-cache line size in bytes */
+#define XCHAL_ICACHE_LINEWIDTH		5	/* log2(I line size in bytes) */
+#define XCHAL_DCACHE_LINEWIDTH		5	/* log2(D line size in bytes) */
+
+#define XCHAL_ICACHE_SIZE		16384	/* I-cache size in bytes or 0 */
+#define XCHAL_DCACHE_SIZE		16384	/* D-cache size in bytes or 0 */
+
+#define XCHAL_DCACHE_IS_WRITEBACK	1	/* writeback feature */
+
+
+
+
+/****************************************************************************
+    Parameters Useful for PRIVILEGED (Supervisory or Non-Virtualized) Code
+ ****************************************************************************/
+
+
+#ifndef XTENSA_HAL_NON_PRIVILEGED_ONLY
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_PIF			1	/* any outbound PIF present */
+
+/*  If present, cache size in bytes == (ways * 2^(linewidth + setwidth)).  */
+
+/*  Number of cache sets in log2(lines per way):  */
+#define XCHAL_ICACHE_SETWIDTH		7
+#define XCHAL_DCACHE_SETWIDTH		7
+
+/*  Cache set associativity (number of ways):  */
+#define XCHAL_ICACHE_WAYS		4
+#define XCHAL_DCACHE_WAYS		4
+
+/*  Cache features:  */
+#define XCHAL_ICACHE_LINE_LOCKABLE	1
+#define XCHAL_DCACHE_LINE_LOCKABLE	1
+#define XCHAL_ICACHE_ECC_PARITY		0
+#define XCHAL_DCACHE_ECC_PARITY		0
+
+/*  Number of encoded cache attr bits (see <xtensa/hal.h> for decoded bits):  */
+#define XCHAL_CA_BITS			4
+
+
+/*----------------------------------------------------------------------
+			INTERNAL I/D RAM/ROMs and XLMI
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_INSTROM		0	/* number of core instr. ROMs */
+#define XCHAL_NUM_INSTRAM		0	/* number of core instr. RAMs */
+#define XCHAL_NUM_DATAROM		0	/* number of core data ROMs */
+#define XCHAL_NUM_DATARAM		0	/* number of core data RAMs */
+#define XCHAL_NUM_URAM			0	/* number of core unified RAMs*/
+#define XCHAL_NUM_XLMI			0	/* number of core XLMI ports */
+
+
+/*----------------------------------------------------------------------
+			INTERRUPTS and TIMERS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_INTERRUPTS		1	/* interrupt option */
+#define XCHAL_HAVE_HIGHPRI_INTERRUPTS	1	/* med/high-pri. interrupts */
+#define XCHAL_HAVE_NMI			1	/* non-maskable interrupt */
+#define XCHAL_HAVE_CCOUNT		1	/* CCOUNT reg. (timer option) */
+#define XCHAL_NUM_TIMERS		3	/* number of CCOMPAREn regs */
+#define XCHAL_NUM_INTERRUPTS		22	/* number of interrupts */
+#define XCHAL_NUM_INTERRUPTS_LOG2	5	/* ceil(log2(NUM_INTERRUPTS)) */
+#define XCHAL_NUM_EXTINTERRUPTS		17	/* num of external interrupts */
+#define XCHAL_NUM_INTLEVELS		6	/* number of interrupt levels
+						   (not including level zero) */
+#define XCHAL_EXCM_LEVEL		3	/* level masked by PS.EXCM */
+	/* (always 1 in XEA1; levels 2 .. EXCM_LEVEL are "medium priority") */
+
+/*  Masks of interrupts at each interrupt level:  */
+#define XCHAL_INTLEVEL1_MASK		0x001F80FF
+#define XCHAL_INTLEVEL2_MASK		0x00000100
+#define XCHAL_INTLEVEL3_MASK		0x00200E00
+#define XCHAL_INTLEVEL4_MASK		0x00001000
+#define XCHAL_INTLEVEL5_MASK		0x00002000
+#define XCHAL_INTLEVEL6_MASK		0x00000000
+#define XCHAL_INTLEVEL7_MASK		0x00004000
+
+/*  Masks of interrupts at each range 1..n of interrupt levels:  */
+#define XCHAL_INTLEVEL1_ANDBELOW_MASK	0x001F80FF
+#define XCHAL_INTLEVEL2_ANDBELOW_MASK	0x001F81FF
+#define XCHAL_INTLEVEL3_ANDBELOW_MASK	0x003F8FFF
+#define XCHAL_INTLEVEL4_ANDBELOW_MASK	0x003F9FFF
+#define XCHAL_INTLEVEL5_ANDBELOW_MASK	0x003FBFFF
+#define XCHAL_INTLEVEL6_ANDBELOW_MASK	0x003FBFFF
+#define XCHAL_INTLEVEL7_ANDBELOW_MASK	0x003FFFFF
+
+/*  Level of each interrupt:  */
+#define XCHAL_INT0_LEVEL		1
+#define XCHAL_INT1_LEVEL		1
+#define XCHAL_INT2_LEVEL		1
+#define XCHAL_INT3_LEVEL		1
+#define XCHAL_INT4_LEVEL		1
+#define XCHAL_INT5_LEVEL		1
+#define XCHAL_INT6_LEVEL		1
+#define XCHAL_INT7_LEVEL		1
+#define XCHAL_INT8_LEVEL		2
+#define XCHAL_INT9_LEVEL		3
+#define XCHAL_INT10_LEVEL		3
+#define XCHAL_INT11_LEVEL		3
+#define XCHAL_INT12_LEVEL		4
+#define XCHAL_INT13_LEVEL		5
+#define XCHAL_INT14_LEVEL		7
+#define XCHAL_INT15_LEVEL		1
+#define XCHAL_INT16_LEVEL		1
+#define XCHAL_INT17_LEVEL		1
+#define XCHAL_INT18_LEVEL		1
+#define XCHAL_INT19_LEVEL		1
+#define XCHAL_INT20_LEVEL		1
+#define XCHAL_INT21_LEVEL		3
+#define XCHAL_DEBUGLEVEL		6	/* debug interrupt level */
+#define XCHAL_HAVE_DEBUG_EXTERN_INT	1	/* OCD external db interrupt */
+#define XCHAL_NMILEVEL			7	/* NMI "level" (for use with
+						   EXCSAVE/EPS/EPC_n, RFI n) */
+
+/*  Type of each interrupt:  */
+#define XCHAL_INT0_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT1_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT2_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT3_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT4_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT5_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT6_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT7_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT8_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT9_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT10_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT11_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT12_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT13_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT14_TYPE 	XTHAL_INTTYPE_NMI
+#define XCHAL_INT15_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT16_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT17_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT18_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT19_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT20_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT21_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+
+/*  Masks of interrupts for each type of interrupt:  */
+#define XCHAL_INTTYPE_MASK_UNCONFIGURED	0xFFC00000
+#define XCHAL_INTTYPE_MASK_SOFTWARE	0x00000880
+#define XCHAL_INTTYPE_MASK_EXTERN_EDGE	0x003F8000
+#define XCHAL_INTTYPE_MASK_EXTERN_LEVEL	0x0000133F
+#define XCHAL_INTTYPE_MASK_TIMER	0x00002440
+#define XCHAL_INTTYPE_MASK_NMI		0x00004000
+#define XCHAL_INTTYPE_MASK_WRITE_ERROR	0x00000000
+
+/*  Interrupt numbers assigned to specific interrupt sources:  */
+#define XCHAL_TIMER0_INTERRUPT		6	/* CCOMPARE0 */
+#define XCHAL_TIMER1_INTERRUPT		10	/* CCOMPARE1 */
+#define XCHAL_TIMER2_INTERRUPT		13	/* CCOMPARE2 */
+#define XCHAL_TIMER3_INTERRUPT		XTHAL_TIMER_UNCONFIGURED
+#define XCHAL_NMI_INTERRUPT		14	/* non-maskable interrupt */
+
+/*  Interrupt numbers for levels at which only one interrupt is configured:  */
+#define XCHAL_INTLEVEL2_NUM		8
+#define XCHAL_INTLEVEL4_NUM		12
+#define XCHAL_INTLEVEL5_NUM		13
+#define XCHAL_INTLEVEL7_NUM		14
+/*  (There are many interrupts each at level(s) 1, 3.)  */
+
+
+/*
+ *  External interrupt vectors/levels.
+ *  These macros describe how Xtensa processor interrupt numbers
+ *  (as numbered internally, eg. in INTERRUPT and INTENABLE registers)
+ *  map to external BInterrupt<n> pins, for those interrupts
+ *  configured as external (level-triggered, edge-triggered, or NMI).
+ *  See the Xtensa processor databook for more details.
+ */
+
+/*  Core interrupt numbers mapped to each EXTERNAL interrupt number:  */
+#define XCHAL_EXTINT0_NUM		0	/* (intlevel 1) */
+#define XCHAL_EXTINT1_NUM		1	/* (intlevel 1) */
+#define XCHAL_EXTINT2_NUM		2	/* (intlevel 1) */
+#define XCHAL_EXTINT3_NUM		3	/* (intlevel 1) */
+#define XCHAL_EXTINT4_NUM		4	/* (intlevel 1) */
+#define XCHAL_EXTINT5_NUM		5	/* (intlevel 1) */
+#define XCHAL_EXTINT6_NUM		8	/* (intlevel 2) */
+#define XCHAL_EXTINT7_NUM		9	/* (intlevel 3) */
+#define XCHAL_EXTINT8_NUM		12	/* (intlevel 4) */
+#define XCHAL_EXTINT9_NUM		14	/* (intlevel 7) */
+#define XCHAL_EXTINT10_NUM		15	/* (intlevel 1) */
+#define XCHAL_EXTINT11_NUM		16	/* (intlevel 1) */
+#define XCHAL_EXTINT12_NUM		17	/* (intlevel 1) */
+#define XCHAL_EXTINT13_NUM		18	/* (intlevel 1) */
+#define XCHAL_EXTINT14_NUM		19	/* (intlevel 1) */
+#define XCHAL_EXTINT15_NUM		20	/* (intlevel 1) */
+#define XCHAL_EXTINT16_NUM		21	/* (intlevel 3) */
+
+
+/*----------------------------------------------------------------------
+			EXCEPTIONS and VECTORS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_XEA_VERSION		2	/* Xtensa Exception Architecture
+						   number: 1 == XEA1 (old)
+							   2 == XEA2 (new)
+							   0 == XEAX (extern) */
+#define XCHAL_HAVE_XEA1			0	/* Exception Architecture 1 */
+#define XCHAL_HAVE_XEA2			1	/* Exception Architecture 2 */
+#define XCHAL_HAVE_XEAX			0	/* External Exception Arch. */
+#define XCHAL_HAVE_EXCEPTIONS		1	/* exception option */
+#define XCHAL_HAVE_MEM_ECC_PARITY	0	/* local memory ECC/parity */
+#define XCHAL_HAVE_VECTOR_SELECT	1	/* relocatable vectors */
+#define XCHAL_HAVE_VECBASE		1	/* relocatable vectors */
+#define XCHAL_VECBASE_RESET_VADDR	0xD0000000  /* VECBASE reset value */
+#define XCHAL_VECBASE_RESET_PADDR	0x00000000
+#define XCHAL_RESET_VECBASE_OVERLAP	0
+
+#define XCHAL_RESET_VECTOR0_VADDR	0xFE000000
+#define XCHAL_RESET_VECTOR0_PADDR	0xFE000000
+#define XCHAL_RESET_VECTOR1_VADDR	0xD8000500
+#define XCHAL_RESET_VECTOR1_PADDR	0x00000500
+#define XCHAL_RESET_VECTOR_VADDR	0xFE000000
+#define XCHAL_RESET_VECTOR_PADDR	0xFE000000
+#define XCHAL_USER_VECOFS		0x00000340
+#define XCHAL_USER_VECTOR_VADDR		0xD0000340
+#define XCHAL_USER_VECTOR_PADDR		0x00000340
+#define XCHAL_KERNEL_VECOFS		0x00000300
+#define XCHAL_KERNEL_VECTOR_VADDR	0xD0000300
+#define XCHAL_KERNEL_VECTOR_PADDR	0x00000300
+#define XCHAL_DOUBLEEXC_VECOFS		0x000003C0
+#define XCHAL_DOUBLEEXC_VECTOR_VADDR	0xD00003C0
+#define XCHAL_DOUBLEEXC_VECTOR_PADDR	0x000003C0
+#define XCHAL_WINDOW_OF4_VECOFS		0x00000000
+#define XCHAL_WINDOW_UF4_VECOFS		0x00000040
+#define XCHAL_WINDOW_OF8_VECOFS		0x00000080
+#define XCHAL_WINDOW_UF8_VECOFS		0x000000C0
+#define XCHAL_WINDOW_OF12_VECOFS	0x00000100
+#define XCHAL_WINDOW_UF12_VECOFS	0x00000140
+#define XCHAL_WINDOW_VECTORS_VADDR	0xD0000000
+#define XCHAL_WINDOW_VECTORS_PADDR	0x00000000
+#define XCHAL_INTLEVEL2_VECOFS		0x00000180
+#define XCHAL_INTLEVEL2_VECTOR_VADDR	0xD0000180
+#define XCHAL_INTLEVEL2_VECTOR_PADDR	0x00000180
+#define XCHAL_INTLEVEL3_VECOFS		0x000001C0
+#define XCHAL_INTLEVEL3_VECTOR_VADDR	0xD00001C0
+#define XCHAL_INTLEVEL3_VECTOR_PADDR	0x000001C0
+#define XCHAL_INTLEVEL4_VECOFS		0x00000200
+#define XCHAL_INTLEVEL4_VECTOR_VADDR	0xD0000200
+#define XCHAL_INTLEVEL4_VECTOR_PADDR	0x00000200
+#define XCHAL_INTLEVEL5_VECOFS		0x00000240
+#define XCHAL_INTLEVEL5_VECTOR_VADDR	0xD0000240
+#define XCHAL_INTLEVEL5_VECTOR_PADDR	0x00000240
+#define XCHAL_INTLEVEL6_VECOFS		0x00000280
+#define XCHAL_INTLEVEL6_VECTOR_VADDR	0xD0000280
+#define XCHAL_INTLEVEL6_VECTOR_PADDR	0x00000280
+#define XCHAL_DEBUG_VECOFS		XCHAL_INTLEVEL6_VECOFS
+#define XCHAL_DEBUG_VECTOR_VADDR	XCHAL_INTLEVEL6_VECTOR_VADDR
+#define XCHAL_DEBUG_VECTOR_PADDR	XCHAL_INTLEVEL6_VECTOR_PADDR
+#define XCHAL_NMI_VECOFS		0x000002C0
+#define XCHAL_NMI_VECTOR_VADDR		0xD00002C0
+#define XCHAL_NMI_VECTOR_PADDR		0x000002C0
+#define XCHAL_INTLEVEL7_VECOFS		XCHAL_NMI_VECOFS
+#define XCHAL_INTLEVEL7_VECTOR_VADDR	XCHAL_NMI_VECTOR_VADDR
+#define XCHAL_INTLEVEL7_VECTOR_PADDR	XCHAL_NMI_VECTOR_PADDR
+
+
+/*----------------------------------------------------------------------
+				DEBUG
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_OCD			1	/* OnChipDebug option */
+#define XCHAL_NUM_IBREAK		2	/* number of IBREAKn regs */
+#define XCHAL_NUM_DBREAK		2	/* number of DBREAKn regs */
+#define XCHAL_HAVE_OCD_DIR_ARRAY	1	/* faster OCD option */
+
+
+/*----------------------------------------------------------------------
+				MMU
+  ----------------------------------------------------------------------*/
+
+/*  See core-matmap.h header file for more details.  */
+
+#define XCHAL_HAVE_TLBS			1	/* inverse of HAVE_CACHEATTR */
+#define XCHAL_HAVE_SPANNING_WAY		0	/* one way maps I+D 4GB vaddr */
+#define XCHAL_HAVE_IDENTITY_MAP		0	/* vaddr == paddr always */
+#define XCHAL_HAVE_CACHEATTR		0	/* CACHEATTR register present */
+#define XCHAL_HAVE_MIMIC_CACHEATTR	0	/* region protection */
+#define XCHAL_HAVE_XLT_CACHEATTR	0	/* region prot. w/translation */
+#define XCHAL_HAVE_PTP_MMU		1	/* full MMU (with page table
+						   [autorefill] and protection)
+						   usable for an MMU-based OS */
+/*  If none of the above last 4 are set, it's a custom TLB configuration.  */
+#define XCHAL_ITLB_ARF_ENTRIES_LOG2	2	/* log2(autorefill way size) */
+#define XCHAL_DTLB_ARF_ENTRIES_LOG2	2	/* log2(autorefill way size) */
+
+#define XCHAL_MMU_ASID_BITS		8	/* number of bits in ASIDs */
+#define XCHAL_MMU_RINGS			4	/* number of rings (1..4) */
+#define XCHAL_MMU_RING_BITS		2	/* num of bits in RING field */
+
+#endif /* !XTENSA_HAL_NON_PRIVILEGED_ONLY */
+
+
+#endif /* _XTENSA_CORE_CONFIGURATION_H */
+
diff --git a/arch/xtensa/variants/dc232b/include/variant/tie-asm.h b/arch/xtensa/variants/dc232b/include/variant/tie-asm.h
new file mode 100644
index 000000000..ed4f53f52
--- /dev/null
+++ b/arch/xtensa/variants/dc232b/include/variant/tie-asm.h
@@ -0,0 +1,122 @@
+/*
+ * This header file contains assembly-language definitions (assembly
+ * macros, etc.) for this specific Xtensa processor's TIE extensions
+ * and options.  It is customized to this Xtensa processor configuration.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1999-2007 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_CORE_TIE_ASM_H
+#define _XTENSA_CORE_TIE_ASM_H
+
+/*  Selection parameter values for save-area save/restore macros:  */
+/*  Option vs. TIE:  */
+#define XTHAL_SAS_TIE	0x0001	/* custom extension or coprocessor */
+#define XTHAL_SAS_OPT	0x0002	/* optional (and not a coprocessor) */
+/*  Whether used automatically by compiler:  */
+#define XTHAL_SAS_NOCC	0x0004	/* not used by compiler w/o special opts/code */
+#define XTHAL_SAS_CC	0x0008	/* used by compiler without special opts/code */
+/*  ABI handling across function calls:  */
+#define XTHAL_SAS_CALR	0x0010	/* caller-saved */
+#define XTHAL_SAS_CALE	0x0020	/* callee-saved */
+#define XTHAL_SAS_GLOB	0x0040	/* global across function calls (in thread) */
+/*  Misc  */
+#define XTHAL_SAS_ALL	0xFFFF	/* include all default NCP contents */
+
+
+
+/* Macro to save all non-coprocessor (extra) custom TIE and optional state
+ * (not including zero-overhead loop registers).
+ * Save area ptr (clobbered):  ptr  (1 byte aligned)
+ * Scratch regs  (clobbered):  at1..at4  (only first XCHAL_NCP_NUM_ATMPS needed)
+ */
+	.macro xchal_ncp_store  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL
+	xchal_sa_start	\continue, \ofs
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~\select
+	xchal_sa_align	\ptr, 0, 1024-8, 4, 4
+	rsr	\at1, ACCLO		// MAC16 accumulator
+	rsr	\at2, ACCHI
+	s32i	\at1, \ptr, .Lxchal_ofs_ + 0
+	s32i	\at2, \ptr, .Lxchal_ofs_ + 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.endif
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
+	xchal_sa_align	\ptr, 0, 1024-16, 4, 4
+	rsr	\at1, M0		// MAC16 registers
+	rsr	\at2, M1
+	s32i	\at1, \ptr, .Lxchal_ofs_ + 0
+	s32i	\at2, \ptr, .Lxchal_ofs_ + 4
+	rsr	\at1, M2
+	rsr	\at2, M3
+	s32i	\at1, \ptr, .Lxchal_ofs_ + 8
+	s32i	\at2, \ptr, .Lxchal_ofs_ + 12
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 16
+	.endif
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
+	xchal_sa_align	\ptr, 0, 1024-4, 4, 4
+	rsr	\at1, SCOMPARE1		// conditional store option
+	s32i	\at1, \ptr, .Lxchal_ofs_ + 0
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~\select
+	xchal_sa_align	\ptr, 0, 1024-4, 4, 4
+	rur	\at1, THREADPTR		// threadptr option
+	s32i	\at1, \ptr, .Lxchal_ofs_ + 0
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	.endm	// xchal_ncp_store
+
+/* Macro to save all non-coprocessor (extra) custom TIE and optional state
+ * (not including zero-overhead loop registers).
+ * Save area ptr (clobbered):  ptr  (1 byte aligned)
+ * Scratch regs  (clobbered):  at1..at4  (only first XCHAL_NCP_NUM_ATMPS needed)
+ */
+	.macro xchal_ncp_load  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL
+	xchal_sa_start	\continue, \ofs
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~\select
+	xchal_sa_align	\ptr, 0, 1024-8, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_ + 0
+	l32i	\at2, \ptr, .Lxchal_ofs_ + 4
+	wsr	\at1, ACCLO		// MAC16 accumulator
+	wsr	\at2, ACCHI
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.endif
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
+	xchal_sa_align	\ptr, 0, 1024-16, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_ + 0
+	l32i	\at2, \ptr, .Lxchal_ofs_ + 4
+	wsr	\at1, M0		// MAC16 registers
+	wsr	\at2, M1
+	l32i	\at1, \ptr, .Lxchal_ofs_ + 8
+	l32i	\at2, \ptr, .Lxchal_ofs_ + 12
+	wsr	\at1, M2
+	wsr	\at2, M3
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 16
+	.endif
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
+	xchal_sa_align	\ptr, 0, 1024-4, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_ + 0
+	wsr	\at1, SCOMPARE1		// conditional store option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~\select
+	xchal_sa_align	\ptr, 0, 1024-4, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_ + 0
+	wur	\at1, THREADPTR		// threadptr option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	.endm	// xchal_ncp_load
+
+
+
+#define XCHAL_NCP_NUM_ATMPS	2
+
+
+#define XCHAL_SA_NUM_ATMPS	2
+
+#endif /*_XTENSA_CORE_TIE_ASM_H*/
+
diff --git a/arch/xtensa/variants/dc232b/include/variant/tie.h b/arch/xtensa/variants/dc232b/include/variant/tie.h
new file mode 100644
index 000000000..018e81af4
--- /dev/null
+++ b/arch/xtensa/variants/dc232b/include/variant/tie.h
@@ -0,0 +1,131 @@
+/*
+ * This header file describes this specific Xtensa processor's TIE extensions
+ * that extend basic Xtensa core functionality.  It is customized to this
+ * Xtensa processor configuration.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1999-2007 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_CORE_TIE_H
+#define _XTENSA_CORE_TIE_H
+
+#define XCHAL_CP_NUM			1	/* number of coprocessors */
+#define XCHAL_CP_MAX			8	/* max CP ID + 1 (0 if none) */
+#define XCHAL_CP_MASK			0x80	/* bitmask of all CPs by ID */
+#define XCHAL_CP_PORT_MASK		0x80	/* bitmask of only port CPs */
+
+/*  Basic parameters of each coprocessor:  */
+#define XCHAL_CP7_NAME			"XTIOP"
+#define XCHAL_CP7_IDENT			XTIOP
+#define XCHAL_CP7_SA_SIZE		0	/* size of state save area */
+#define XCHAL_CP7_SA_ALIGN		1	/* min alignment of save area */
+#define XCHAL_CP_ID_XTIOP		7	/* coprocessor ID (0..7) */
+
+/*  Filler info for unassigned coprocessors, to simplify arrays etc:  */
+#define XCHAL_CP0_SA_SIZE		0
+#define XCHAL_CP0_SA_ALIGN		1
+#define XCHAL_CP1_SA_SIZE		0
+#define XCHAL_CP1_SA_ALIGN		1
+#define XCHAL_CP2_SA_SIZE		0
+#define XCHAL_CP2_SA_ALIGN		1
+#define XCHAL_CP3_SA_SIZE		0
+#define XCHAL_CP3_SA_ALIGN		1
+#define XCHAL_CP4_SA_SIZE		0
+#define XCHAL_CP4_SA_ALIGN		1
+#define XCHAL_CP5_SA_SIZE		0
+#define XCHAL_CP5_SA_ALIGN		1
+#define XCHAL_CP6_SA_SIZE		0
+#define XCHAL_CP6_SA_ALIGN		1
+
+/*  Save area for non-coprocessor optional and custom (TIE) state:  */
+#define XCHAL_NCP_SA_SIZE		32
+#define XCHAL_NCP_SA_ALIGN		4
+
+/*  Total save area for optional and custom state (NCP + CPn):  */
+#define XCHAL_TOTAL_SA_SIZE		32	/* with 16-byte align padding */
+#define XCHAL_TOTAL_SA_ALIGN		4	/* actual minimum alignment */
+
+/*
+ * Detailed contents of save areas.
+ * NOTE:  caller must define the XCHAL_SA_REG macro (not defined here)
+ * before expanding the XCHAL_xxx_SA_LIST() macros.
+ *
+ * XCHAL_SA_REG(s,ccused,abikind,kind,opt,name,galign,align,asize,
+ *		dbnum,base,regnum,bitsz,gapsz,reset,x...)
+ *
+ *	s = passed from XCHAL_*_LIST(s), eg. to select how to expand
+ *	ccused = set if used by compiler without special options or code
+ *	abikind = 0 (caller-saved), 1 (callee-saved), or 2 (thread-global)
+ *	kind = 0 (special reg), 1 (TIE user reg), or 2 (TIE regfile reg)
+ *	opt = 0 (custom TIE extension or coprocessor), or 1 (optional reg)
+ *	name = lowercase reg name (no quotes)
+ *	galign = group byte alignment (power of 2) (galign >= align)
+ *	align = register byte alignment (power of 2)
+ *	asize = allocated size in bytes (asize*8 == bitsz + gapsz + padsz)
+ *	  (not including any pad bytes required to galign this or next reg)
+ *	dbnum = unique target number f/debug (see <xtensa-libdb-macros.h>)
+ *	base = reg shortname w/o index (or sr=special, ur=TIE user reg)
+ *	regnum = reg index in regfile, or special/TIE-user reg number
+ *	bitsz = number of significant bits (regfile width, or ur/sr mask bits)
+ *	gapsz = intervening bits, if bitsz bits not stored contiguously
+ *	(padsz = pad bits at end [TIE regfile] or at msbits [ur,sr] of asize)
+ *	reset = register reset value (or 0 if undefined at reset)
+ *	x = reserved for future use (0 until then)
+ *
+ *  To filter out certain registers, e.g. to expand only the non-global
+ *  registers used by the compiler, you can do something like this:
+ *
+ *  #define XCHAL_SA_REG(s,ccused,p...)	SELCC##ccused(p)
+ *  #define SELCC0(p...)
+ *  #define SELCC1(abikind,p...)	SELAK##abikind(p)
+ *  #define SELAK0(p...)		REG(p)
+ *  #define SELAK1(p...)		REG(p)
+ *  #define SELAK2(p...)
+ *  #define REG(kind,tie,name,galn,aln,asz,csz,dbnum,base,rnum,bsz,rst,x...) \
+ *		...what you want to expand...
+ */
+
+#define XCHAL_NCP_SA_NUM	8
+#define XCHAL_NCP_SA_LIST(s)	\
+ XCHAL_SA_REG(s,1,0,0,1,          acclo, 4, 4, 4,0x0210,  sr,16 , 32,0,0,0) \
+ XCHAL_SA_REG(s,1,0,0,1,          acchi, 4, 4, 4,0x0211,  sr,17 ,  8,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m0, 4, 4, 4,0x0220,  sr,32 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m1, 4, 4, 4,0x0221,  sr,33 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m2, 4, 4, 4,0x0222,  sr,34 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m3, 4, 4, 4,0x0223,  sr,35 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,      scompare1, 4, 4, 4,0x020C,  sr,12 , 32,0,0,0) \
+ XCHAL_SA_REG(s,1,2,1,1,      threadptr, 4, 4, 4,0x03E7,  ur,231, 32,0,0,0)
+
+#define XCHAL_CP0_SA_NUM	0
+#define XCHAL_CP0_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP1_SA_NUM	0
+#define XCHAL_CP1_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP2_SA_NUM	0
+#define XCHAL_CP2_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP3_SA_NUM	0
+#define XCHAL_CP3_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP4_SA_NUM	0
+#define XCHAL_CP4_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP5_SA_NUM	0
+#define XCHAL_CP5_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP6_SA_NUM	0
+#define XCHAL_CP6_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP7_SA_NUM	0
+#define XCHAL_CP7_SA_LIST(s)	/* empty */
+
+/* Byte length of instruction from its first nibble (op0 field), per FLIX.  */
+#define XCHAL_OP0_FORMAT_LENGTHS	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3
+
+#endif /*_XTENSA_CORE_TIE_H*/
+
diff --git a/arch/xtensa/variants/dc233c/include/variant/core.h b/arch/xtensa/variants/dc233c/include/variant/core.h
new file mode 100644
index 000000000..3a2e53b94
--- /dev/null
+++ b/arch/xtensa/variants/dc233c/include/variant/core.h
@@ -0,0 +1,475 @@
+/* 
+ * xtensa/config/core-isa.h -- HAL definitions that are dependent on Xtensa
+ *				processor CORE configuration
+ *
+ *  See <xtensa/config/core.h>, which includes this file, for more details.
+ */
+
+/* Xtensa processor core configuration information.
+
+   Copyright (c) 1999-2010 Tensilica Inc.
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be included
+   in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _XTENSA_CORE_CONFIGURATION_H
+#define _XTENSA_CORE_CONFIGURATION_H
+
+
+/****************************************************************************
+	    Parameters Useful for Any Code, USER or PRIVILEGED
+ ****************************************************************************/
+
+/*
+ *  Note:  Macros of the form XCHAL_HAVE_*** have a value of 1 if the option is
+ *  configured, and a value of 0 otherwise.  These macros are always defined.
+ */
+
+
+/*----------------------------------------------------------------------
+				ISA
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_BE			0	/* big-endian byte ordering */
+#define XCHAL_HAVE_WINDOWED		1	/* windowed registers option */
+#define XCHAL_NUM_AREGS			32	/* num of physical addr regs */
+#define XCHAL_NUM_AREGS_LOG2		5	/* log2(XCHAL_NUM_AREGS) */
+#define XCHAL_MAX_INSTRUCTION_SIZE	3	/* max instr bytes (3..8) */
+#define XCHAL_HAVE_DEBUG		1	/* debug option */
+#define XCHAL_HAVE_DENSITY		1	/* 16-bit instructions */
+#define XCHAL_HAVE_LOOPS		1	/* zero-overhead loops */
+#define XCHAL_HAVE_NSA			1	/* NSA/NSAU instructions */
+#define XCHAL_HAVE_MINMAX		1	/* MIN/MAX instructions */
+#define XCHAL_HAVE_SEXT			1	/* SEXT instruction */
+#define XCHAL_HAVE_CLAMPS		1	/* CLAMPS instruction */
+#define XCHAL_HAVE_MUL16		1	/* MUL16S/MUL16U instructions */
+#define XCHAL_HAVE_MUL32		1	/* MULL instruction */
+#define XCHAL_HAVE_MUL32_HIGH		0	/* MULUH/MULSH instructions */
+#define XCHAL_HAVE_DIV32		1	/* QUOS/QUOU/REMS/REMU instructions */
+#define XCHAL_HAVE_L32R			1	/* L32R instruction */
+#define XCHAL_HAVE_ABSOLUTE_LITERALS	1	/* non-PC-rel (extended) L32R */
+#define XCHAL_HAVE_CONST16		0	/* CONST16 instruction */
+#define XCHAL_HAVE_ADDX			1	/* ADDX#/SUBX# instructions */
+#define XCHAL_HAVE_WIDE_BRANCHES	0	/* B*.W18 or B*.W15 instr's */
+#define XCHAL_HAVE_PREDICTED_BRANCHES	0	/* B[EQ/EQZ/NE/NEZ]T instr's */
+#define XCHAL_HAVE_CALL4AND12		1	/* (obsolete option) */
+#define XCHAL_HAVE_ABS			1	/* ABS instruction */
+/*#define XCHAL_HAVE_POPC		0*/	/* POPC instruction */
+/*#define XCHAL_HAVE_CRC		0*/	/* CRC instruction */
+#define XCHAL_HAVE_RELEASE_SYNC		1	/* L32AI/S32RI instructions */
+#define XCHAL_HAVE_S32C1I		1	/* S32C1I instruction */
+#define XCHAL_HAVE_SPECULATION		0	/* speculation */
+#define XCHAL_HAVE_FULL_RESET		1	/* all regs/state reset */
+#define XCHAL_NUM_CONTEXTS		1	/* */
+#define XCHAL_NUM_MISC_REGS		2	/* num of scratch regs (0..4) */
+#define XCHAL_HAVE_TAP_MASTER		0	/* JTAG TAP control instr's */
+#define XCHAL_HAVE_PRID			1	/* processor ID register */
+#define XCHAL_HAVE_EXTERN_REGS		1	/* WER/RER instructions */
+#define XCHAL_HAVE_MP_INTERRUPTS	0	/* interrupt distributor port */
+#define XCHAL_HAVE_MP_RUNSTALL		0	/* core RunStall control port */
+#define XCHAL_HAVE_THREADPTR		1	/* THREADPTR register */
+#define XCHAL_HAVE_BOOLEANS		0	/* boolean registers */
+#define XCHAL_HAVE_CP			1	/* CPENABLE reg (coprocessor) */
+#define XCHAL_CP_MAXCFG			8	/* max allowed cp id plus one */
+#define XCHAL_HAVE_MAC16		1	/* MAC16 package */
+#define XCHAL_HAVE_VECTORFPU2005	0	/* vector floating-point pkg */
+#define XCHAL_HAVE_FP			0	/* floating point pkg */
+#define XCHAL_HAVE_DFP			0	/* double precision FP pkg */
+#define XCHAL_HAVE_DFP_accel		0	/* double precision FP acceleration pkg */
+#define XCHAL_HAVE_VECTRA1		0	/* Vectra I  pkg */
+#define XCHAL_HAVE_VECTRALX		0	/* Vectra LX pkg */
+#define XCHAL_HAVE_HIFIPRO		0	/* HiFiPro Audio Engine pkg */
+#define XCHAL_HAVE_HIFI2		0	/* HiFi2 Audio Engine pkg */
+#define XCHAL_HAVE_HIFI2EP	0	/* HiFi2EP */
+#define XCHAL_HAVE_CONNXD2		0	/* ConnX D2 pkg */
+#define XCHAL_HAVE_BBE16		0	/* ConnX BBE16 pkg */
+#define XCHAL_HAVE_BBE16_RSQRT		0	/* BBE16 & vector recip sqrt */
+#define XCHAL_HAVE_BBE16_VECDIV		0	/* BBE16 & vector divide */
+#define XCHAL_HAVE_BBE16_DESPREAD	0	/* BBE16 & despread */
+#define XCHAL_HAVE_BSP3			0	/* ConnX BSP3 pkg */
+#define XCHAL_HAVE_SSP16		0	/* ConnX SSP16 pkg */
+#define XCHAL_HAVE_SSP16_VITERBI	0	/* SSP16 & viterbi */
+#define XCHAL_HAVE_TURBO16		0	/* ConnX Turbo16 pkg */
+#define XCHAL_HAVE_BBP16		0	/* ConnX BBP16 pkg */
+
+
+/*----------------------------------------------------------------------
+				MISC
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_WRITEBUFFER_ENTRIES	8	/* size of write buffer */
+#define XCHAL_INST_FETCH_WIDTH		4	/* instr-fetch width in bytes */
+#define XCHAL_DATA_WIDTH		4	/* data width in bytes */
+/*  In T1050, applies to selected core load and store instructions (see ISA): */
+#define XCHAL_UNALIGNED_LOAD_EXCEPTION	1	/* unaligned loads cause exc. */
+#define XCHAL_UNALIGNED_STORE_EXCEPTION	1	/* unaligned stores cause exc.*/
+#define XCHAL_UNALIGNED_LOAD_HW		0	/* unaligned loads work in hw */
+#define XCHAL_UNALIGNED_STORE_HW	0	/* unaligned stores work in hw*/
+
+#define XCHAL_SW_VERSION		900001	/* sw version of this header */
+
+#define XCHAL_CORE_ID			"dc233c"	/* alphanum core name
+						   (CoreID) set in the Xtensa
+						   Processor Generator */
+
+#define XCHAL_CORE_DESCRIPTION		"dc233c"
+#define XCHAL_BUILD_UNIQUE_ID		0x00004B21	/* 22-bit sw build ID */
+
+/*
+ *  These definitions describe the hardware targeted by this software.
+ */
+#define XCHAL_HW_CONFIGID0		0xC56707FE	/* ConfigID hi 32 bits*/
+#define XCHAL_HW_CONFIGID1		0x14404B21	/* ConfigID lo 32 bits*/
+#define XCHAL_HW_VERSION_NAME		"LX4.0.1"	/* full version name */
+#define XCHAL_HW_VERSION_MAJOR		2400	/* major ver# of targeted hw */
+#define XCHAL_HW_VERSION_MINOR		1	/* minor ver# of targeted hw */
+#define XCHAL_HW_VERSION		240001	/* major*100+minor */
+#define XCHAL_HW_REL_LX4		1
+#define XCHAL_HW_REL_LX4_0		1
+#define XCHAL_HW_REL_LX4_0_1		1
+#define XCHAL_HW_CONFIGID_RELIABLE	1
+/*  If software targets a *range* of hardware versions, these are the bounds: */
+#define XCHAL_HW_MIN_VERSION_MAJOR	2400	/* major v of earliest tgt hw */
+#define XCHAL_HW_MIN_VERSION_MINOR	1	/* minor v of earliest tgt hw */
+#define XCHAL_HW_MIN_VERSION		240001	/* earliest targeted hw */
+#define XCHAL_HW_MAX_VERSION_MAJOR	2400	/* major v of latest tgt hw */
+#define XCHAL_HW_MAX_VERSION_MINOR	1	/* minor v of latest tgt hw */
+#define XCHAL_HW_MAX_VERSION		240001	/* latest targeted hw */
+
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_ICACHE_LINESIZE		32	/* I-cache line size in bytes */
+#define XCHAL_DCACHE_LINESIZE		32	/* D-cache line size in bytes */
+#define XCHAL_ICACHE_LINEWIDTH		5	/* log2(I line size in bytes) */
+#define XCHAL_DCACHE_LINEWIDTH		5	/* log2(D line size in bytes) */
+
+#define XCHAL_ICACHE_SIZE		16384	/* I-cache size in bytes or 0 */
+#define XCHAL_DCACHE_SIZE		16384	/* D-cache size in bytes or 0 */
+
+#define XCHAL_DCACHE_IS_WRITEBACK	1	/* writeback feature */
+#define XCHAL_DCACHE_IS_COHERENT	0	/* MP coherence feature */
+
+#define XCHAL_HAVE_PREFETCH		0	/* PREFCTL register */
+
+
+
+
+/****************************************************************************
+    Parameters Useful for PRIVILEGED (Supervisory or Non-Virtualized) Code
+ ****************************************************************************/
+
+
+#ifndef XTENSA_HAL_NON_PRIVILEGED_ONLY
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_PIF			1	/* any outbound PIF present */
+
+/*  If present, cache size in bytes == (ways * 2^(linewidth + setwidth)).  */
+
+/*  Number of cache sets in log2(lines per way):  */
+#define XCHAL_ICACHE_SETWIDTH		7
+#define XCHAL_DCACHE_SETWIDTH		7
+
+/*  Cache set associativity (number of ways):  */
+#define XCHAL_ICACHE_WAYS		4
+#define XCHAL_DCACHE_WAYS		4
+
+/*  Cache features:  */
+#define XCHAL_ICACHE_LINE_LOCKABLE	1
+#define XCHAL_DCACHE_LINE_LOCKABLE	1
+#define XCHAL_ICACHE_ECC_PARITY		0
+#define XCHAL_DCACHE_ECC_PARITY		0
+
+/*  Cache access size in bytes (affects operation of SICW instruction):  */
+#define XCHAL_ICACHE_ACCESS_SIZE	4
+#define XCHAL_DCACHE_ACCESS_SIZE	4
+
+/*  Number of encoded cache attr bits (see <xtensa/hal.h> for decoded bits):  */
+#define XCHAL_CA_BITS			4
+
+
+/*----------------------------------------------------------------------
+			INTERNAL I/D RAM/ROMs and XLMI
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_INSTROM		0	/* number of core instr. ROMs */
+#define XCHAL_NUM_INSTRAM		0	/* number of core instr. RAMs */
+#define XCHAL_NUM_DATAROM		0	/* number of core data ROMs */
+#define XCHAL_NUM_DATARAM		0	/* number of core data RAMs */
+#define XCHAL_NUM_URAM			0	/* number of core unified RAMs*/
+#define XCHAL_NUM_XLMI			0	/* number of core XLMI ports */
+
+#define XCHAL_HAVE_IMEM_LOADSTORE	1	/* can load/store to IROM/IRAM*/
+
+
+/*----------------------------------------------------------------------
+			INTERRUPTS and TIMERS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_INTERRUPTS		1	/* interrupt option */
+#define XCHAL_HAVE_HIGHPRI_INTERRUPTS	1	/* med/high-pri. interrupts */
+#define XCHAL_HAVE_NMI			1	/* non-maskable interrupt */
+#define XCHAL_HAVE_CCOUNT		1	/* CCOUNT reg. (timer option) */
+#define XCHAL_NUM_TIMERS		3	/* number of CCOMPAREn regs */
+#define XCHAL_NUM_INTERRUPTS		22	/* number of interrupts */
+#define XCHAL_NUM_INTERRUPTS_LOG2	5	/* ceil(log2(NUM_INTERRUPTS)) */
+#define XCHAL_NUM_EXTINTERRUPTS		17	/* num of external interrupts */
+#define XCHAL_NUM_INTLEVELS		6	/* number of interrupt levels
+						   (not including level zero) */
+#define XCHAL_EXCM_LEVEL		3	/* level masked by PS.EXCM */
+	/* (always 1 in XEA1; levels 2 .. EXCM_LEVEL are "medium priority") */
+
+/*  Masks of interrupts at each interrupt level:  */
+#define XCHAL_INTLEVEL1_MASK		0x001F80FF
+#define XCHAL_INTLEVEL2_MASK		0x00000100
+#define XCHAL_INTLEVEL3_MASK		0x00200E00
+#define XCHAL_INTLEVEL4_MASK		0x00001000
+#define XCHAL_INTLEVEL5_MASK		0x00002000
+#define XCHAL_INTLEVEL6_MASK		0x00000000
+#define XCHAL_INTLEVEL7_MASK		0x00004000
+
+/*  Masks of interrupts at each range 1..n of interrupt levels:  */
+#define XCHAL_INTLEVEL1_ANDBELOW_MASK	0x001F80FF
+#define XCHAL_INTLEVEL2_ANDBELOW_MASK	0x001F81FF
+#define XCHAL_INTLEVEL3_ANDBELOW_MASK	0x003F8FFF
+#define XCHAL_INTLEVEL4_ANDBELOW_MASK	0x003F9FFF
+#define XCHAL_INTLEVEL5_ANDBELOW_MASK	0x003FBFFF
+#define XCHAL_INTLEVEL6_ANDBELOW_MASK	0x003FBFFF
+#define XCHAL_INTLEVEL7_ANDBELOW_MASK	0x003FFFFF
+
+/*  Level of each interrupt:  */
+#define XCHAL_INT0_LEVEL		1
+#define XCHAL_INT1_LEVEL		1
+#define XCHAL_INT2_LEVEL		1
+#define XCHAL_INT3_LEVEL		1
+#define XCHAL_INT4_LEVEL		1
+#define XCHAL_INT5_LEVEL		1
+#define XCHAL_INT6_LEVEL		1
+#define XCHAL_INT7_LEVEL		1
+#define XCHAL_INT8_LEVEL		2
+#define XCHAL_INT9_LEVEL		3
+#define XCHAL_INT10_LEVEL		3
+#define XCHAL_INT11_LEVEL		3
+#define XCHAL_INT12_LEVEL		4
+#define XCHAL_INT13_LEVEL		5
+#define XCHAL_INT14_LEVEL		7
+#define XCHAL_INT15_LEVEL		1
+#define XCHAL_INT16_LEVEL		1
+#define XCHAL_INT17_LEVEL		1
+#define XCHAL_INT18_LEVEL		1
+#define XCHAL_INT19_LEVEL		1
+#define XCHAL_INT20_LEVEL		1
+#define XCHAL_INT21_LEVEL		3
+#define XCHAL_DEBUGLEVEL		6	/* debug interrupt level */
+#define XCHAL_HAVE_DEBUG_EXTERN_INT	1	/* OCD external db interrupt */
+#define XCHAL_NMILEVEL			7	/* NMI "level" (for use with
+						   EXCSAVE/EPS/EPC_n, RFI n) */
+
+/*  Type of each interrupt:  */
+#define XCHAL_INT0_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT1_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT2_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT3_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT4_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT5_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT6_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT7_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT8_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT9_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT10_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT11_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT12_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT13_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT14_TYPE 	XTHAL_INTTYPE_NMI
+#define XCHAL_INT15_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT16_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT17_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT18_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT19_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT20_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT21_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+
+/*  Masks of interrupts for each type of interrupt:  */
+#define XCHAL_INTTYPE_MASK_UNCONFIGURED	0xFFC00000
+#define XCHAL_INTTYPE_MASK_SOFTWARE	0x00000880
+#define XCHAL_INTTYPE_MASK_EXTERN_EDGE	0x003F8000
+#define XCHAL_INTTYPE_MASK_EXTERN_LEVEL	0x0000133F
+#define XCHAL_INTTYPE_MASK_TIMER	0x00002440
+#define XCHAL_INTTYPE_MASK_NMI		0x00004000
+#define XCHAL_INTTYPE_MASK_WRITE_ERROR	0x00000000
+
+/*  Interrupt numbers assigned to specific interrupt sources:  */
+#define XCHAL_TIMER0_INTERRUPT		6	/* CCOMPARE0 */
+#define XCHAL_TIMER1_INTERRUPT		10	/* CCOMPARE1 */
+#define XCHAL_TIMER2_INTERRUPT		13	/* CCOMPARE2 */
+#define XCHAL_TIMER3_INTERRUPT		XTHAL_TIMER_UNCONFIGURED
+#define XCHAL_NMI_INTERRUPT		14	/* non-maskable interrupt */
+
+/*  Interrupt numbers for levels at which only one interrupt is configured:  */
+#define XCHAL_INTLEVEL2_NUM		8
+#define XCHAL_INTLEVEL4_NUM		12
+#define XCHAL_INTLEVEL5_NUM		13
+#define XCHAL_INTLEVEL7_NUM		14
+/*  (There are many interrupts each at level(s) 1, 3.)  */
+
+
+/*
+ *  External interrupt vectors/levels.
+ *  These macros describe how Xtensa processor interrupt numbers
+ *  (as numbered internally, eg. in INTERRUPT and INTENABLE registers)
+ *  map to external BInterrupt<n> pins, for those interrupts
+ *  configured as external (level-triggered, edge-triggered, or NMI).
+ *  See the Xtensa processor databook for more details.
+ */
+
+/*  Core interrupt numbers mapped to each EXTERNAL interrupt number:  */
+#define XCHAL_EXTINT0_NUM		0	/* (intlevel 1) */
+#define XCHAL_EXTINT1_NUM		1	/* (intlevel 1) */
+#define XCHAL_EXTINT2_NUM		2	/* (intlevel 1) */
+#define XCHAL_EXTINT3_NUM		3	/* (intlevel 1) */
+#define XCHAL_EXTINT4_NUM		4	/* (intlevel 1) */
+#define XCHAL_EXTINT5_NUM		5	/* (intlevel 1) */
+#define XCHAL_EXTINT6_NUM		8	/* (intlevel 2) */
+#define XCHAL_EXTINT7_NUM		9	/* (intlevel 3) */
+#define XCHAL_EXTINT8_NUM		12	/* (intlevel 4) */
+#define XCHAL_EXTINT9_NUM		14	/* (intlevel 7) */
+#define XCHAL_EXTINT10_NUM		15	/* (intlevel 1) */
+#define XCHAL_EXTINT11_NUM		16	/* (intlevel 1) */
+#define XCHAL_EXTINT12_NUM		17	/* (intlevel 1) */
+#define XCHAL_EXTINT13_NUM		18	/* (intlevel 1) */
+#define XCHAL_EXTINT14_NUM		19	/* (intlevel 1) */
+#define XCHAL_EXTINT15_NUM		20	/* (intlevel 1) */
+#define XCHAL_EXTINT16_NUM		21	/* (intlevel 3) */
+
+
+/*----------------------------------------------------------------------
+			EXCEPTIONS and VECTORS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_XEA_VERSION		2	/* Xtensa Exception Architecture
+						   number: 1 == XEA1 (old)
+							   2 == XEA2 (new)
+							   0 == XEAX (extern) or TX */
+#define XCHAL_HAVE_XEA1			0	/* Exception Architecture 1 */
+#define XCHAL_HAVE_XEA2			1	/* Exception Architecture 2 */
+#define XCHAL_HAVE_XEAX			0	/* External Exception Arch. */
+#define XCHAL_HAVE_EXCEPTIONS		1	/* exception option */
+#define XCHAL_HAVE_HALT			0	/* halt architecture option */
+#define XCHAL_HAVE_BOOTLOADER		0	/* boot loader (for TX) */
+#define XCHAL_HAVE_MEM_ECC_PARITY	0	/* local memory ECC/parity */
+#define XCHAL_HAVE_VECTOR_SELECT	1	/* relocatable vectors */
+#define XCHAL_HAVE_VECBASE		1	/* relocatable vectors */
+#define XCHAL_VECBASE_RESET_VADDR	0x00002000  /* VECBASE reset value */
+#define XCHAL_VECBASE_RESET_PADDR	0x00002000
+#define XCHAL_RESET_VECBASE_OVERLAP	0
+
+#define XCHAL_RESET_VECTOR0_VADDR	0xFE000000
+#define XCHAL_RESET_VECTOR0_PADDR	0xFE000000
+#define XCHAL_RESET_VECTOR1_VADDR	0x00001000
+#define XCHAL_RESET_VECTOR1_PADDR	0x00001000
+#define XCHAL_RESET_VECTOR_VADDR	0xFE000000
+#define XCHAL_RESET_VECTOR_PADDR	0xFE000000
+#define XCHAL_USER_VECOFS		0x00000340
+#define XCHAL_USER_VECTOR_VADDR		0x00002340
+#define XCHAL_USER_VECTOR_PADDR		0x00002340
+#define XCHAL_KERNEL_VECOFS		0x00000300
+#define XCHAL_KERNEL_VECTOR_VADDR	0x00002300
+#define XCHAL_KERNEL_VECTOR_PADDR	0x00002300
+#define XCHAL_DOUBLEEXC_VECOFS		0x000003C0
+#define XCHAL_DOUBLEEXC_VECTOR_VADDR	0x000023C0
+#define XCHAL_DOUBLEEXC_VECTOR_PADDR	0x000023C0
+#define XCHAL_WINDOW_OF4_VECOFS		0x00000000
+#define XCHAL_WINDOW_UF4_VECOFS		0x00000040
+#define XCHAL_WINDOW_OF8_VECOFS		0x00000080
+#define XCHAL_WINDOW_UF8_VECOFS		0x000000C0
+#define XCHAL_WINDOW_OF12_VECOFS	0x00000100
+#define XCHAL_WINDOW_UF12_VECOFS	0x00000140
+#define XCHAL_WINDOW_VECTORS_VADDR	0x00002000
+#define XCHAL_WINDOW_VECTORS_PADDR	0x00002000
+#define XCHAL_INTLEVEL2_VECOFS		0x00000180
+#define XCHAL_INTLEVEL2_VECTOR_VADDR	0x00002180
+#define XCHAL_INTLEVEL2_VECTOR_PADDR	0x00002180
+#define XCHAL_INTLEVEL3_VECOFS		0x000001C0
+#define XCHAL_INTLEVEL3_VECTOR_VADDR	0x000021C0
+#define XCHAL_INTLEVEL3_VECTOR_PADDR	0x000021C0
+#define XCHAL_INTLEVEL4_VECOFS		0x00000200
+#define XCHAL_INTLEVEL4_VECTOR_VADDR	0x00002200
+#define XCHAL_INTLEVEL4_VECTOR_PADDR	0x00002200
+#define XCHAL_INTLEVEL5_VECOFS		0x00000240
+#define XCHAL_INTLEVEL5_VECTOR_VADDR	0x00002240
+#define XCHAL_INTLEVEL5_VECTOR_PADDR	0x00002240
+#define XCHAL_INTLEVEL6_VECOFS		0x00000280
+#define XCHAL_INTLEVEL6_VECTOR_VADDR	0x00002280
+#define XCHAL_INTLEVEL6_VECTOR_PADDR	0x00002280
+#define XCHAL_DEBUG_VECOFS		XCHAL_INTLEVEL6_VECOFS
+#define XCHAL_DEBUG_VECTOR_VADDR	XCHAL_INTLEVEL6_VECTOR_VADDR
+#define XCHAL_DEBUG_VECTOR_PADDR	XCHAL_INTLEVEL6_VECTOR_PADDR
+#define XCHAL_NMI_VECOFS		0x000002C0
+#define XCHAL_NMI_VECTOR_VADDR		0x000022C0
+#define XCHAL_NMI_VECTOR_PADDR		0x000022C0
+#define XCHAL_INTLEVEL7_VECOFS		XCHAL_NMI_VECOFS
+#define XCHAL_INTLEVEL7_VECTOR_VADDR	XCHAL_NMI_VECTOR_VADDR
+#define XCHAL_INTLEVEL7_VECTOR_PADDR	XCHAL_NMI_VECTOR_PADDR
+
+
+/*----------------------------------------------------------------------
+				DEBUG
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_OCD			1	/* OnChipDebug option */
+#define XCHAL_NUM_IBREAK		2	/* number of IBREAKn regs */
+#define XCHAL_NUM_DBREAK		2	/* number of DBREAKn regs */
+#define XCHAL_HAVE_OCD_DIR_ARRAY	1	/* faster OCD option */
+
+
+/*----------------------------------------------------------------------
+				MMU
+  ----------------------------------------------------------------------*/
+
+/*  See core-matmap.h header file for more details.  */
+
+#define XCHAL_HAVE_TLBS			1	/* inverse of HAVE_CACHEATTR */
+#define XCHAL_HAVE_SPANNING_WAY		1	/* one way maps I+D 4GB vaddr */
+#define XCHAL_SPANNING_WAY		6	/* TLB spanning way number */
+#define XCHAL_HAVE_IDENTITY_MAP		0	/* vaddr == paddr always */
+#define XCHAL_HAVE_CACHEATTR		0	/* CACHEATTR register present */
+#define XCHAL_HAVE_MIMIC_CACHEATTR	0	/* region protection */
+#define XCHAL_HAVE_XLT_CACHEATTR	0	/* region prot. w/translation */
+#define XCHAL_HAVE_PTP_MMU		1	/* full MMU (with page table
+						   [autorefill] and protection)
+						   usable for an MMU-based OS */
+/*  If none of the above last 4 are set, it's a custom TLB configuration.  */
+#define XCHAL_ITLB_ARF_ENTRIES_LOG2	2	/* log2(autorefill way size) */
+#define XCHAL_DTLB_ARF_ENTRIES_LOG2	2	/* log2(autorefill way size) */
+
+#define XCHAL_MMU_ASID_BITS		8	/* number of bits in ASIDs */
+#define XCHAL_MMU_RINGS			4	/* number of rings (1..4) */
+#define XCHAL_MMU_RING_BITS		2	/* num of bits in RING field */
+
+#endif /* !XTENSA_HAL_NON_PRIVILEGED_ONLY */
+
+
+#endif /* _XTENSA_CORE_CONFIGURATION_H */
+
diff --git a/arch/xtensa/variants/dc233c/include/variant/tie-asm.h b/arch/xtensa/variants/dc233c/include/variant/tie-asm.h
new file mode 100644
index 000000000..5dbd981ea
--- /dev/null
+++ b/arch/xtensa/variants/dc233c/include/variant/tie-asm.h
@@ -0,0 +1,193 @@
+/* 
+ * tie-asm.h -- compile-time HAL assembler definitions dependent on CORE & TIE
+ *
+ *  NOTE:  This header file is not meant to be included directly.
+ */
+
+/* This header file contains assembly-language definitions (assembly
+   macros, etc.) for this specific Xtensa processor's TIE extensions
+   and options.  It is customized to this Xtensa processor configuration.
+
+   Copyright (c) 1999-2010 Tensilica Inc.
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be included
+   in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _XTENSA_CORE_TIE_ASM_H
+#define _XTENSA_CORE_TIE_ASM_H
+
+/*  Selection parameter values for save-area save/restore macros:  */
+/*  Option vs. TIE:  */
+#define XTHAL_SAS_TIE	0x0001	/* custom extension or coprocessor */
+#define XTHAL_SAS_OPT	0x0002	/* optional (and not a coprocessor) */
+#define XTHAL_SAS_ANYOT	0x0003	/* both of the above */
+/*  Whether used automatically by compiler:  */
+#define XTHAL_SAS_NOCC	0x0004	/* not used by compiler w/o special opts/code */
+#define XTHAL_SAS_CC	0x0008	/* used by compiler without special opts/code */
+#define XTHAL_SAS_ANYCC	0x000C	/* both of the above */
+/*  ABI handling across function calls:  */
+#define XTHAL_SAS_CALR	0x0010	/* caller-saved */
+#define XTHAL_SAS_CALE	0x0020	/* callee-saved */
+#define XTHAL_SAS_GLOB	0x0040	/* global across function calls (in thread) */
+#define XTHAL_SAS_ANYABI 0x0070	/* all of the above three */
+/*  Misc  */
+#define XTHAL_SAS_ALL	0xFFFF	/* include all default NCP contents */
+#define XTHAL_SAS3(optie,ccuse,abi)	( ((optie) & XTHAL_SAS_ANYOT)  \
+					| ((ccuse) & XTHAL_SAS_ANYCC)  \
+					| ((abi)   & XTHAL_SAS_ANYABI) )
+
+
+
+    /*
+     *  Macro to save all non-coprocessor (extra) custom TIE and optional state
+     *  (not including zero-overhead loop registers).
+     *  Required parameters:
+     *      ptr		Save area pointer address register (clobbered)
+     *			(register must contain a 4 byte aligned address).
+     *      at1..at4	Four temporary address registers (first XCHAL_NCP_NUM_ATMPS
+     *			registers are clobbered, the remaining are unused).
+     *  Optional parameters:
+     *      continue	If macro invoked as part of a larger store sequence, set to 1
+     *			if this is not the first in the sequence.  Defaults to 0.
+     *      ofs		Offset from start of larger sequence (from value of first ptr
+     *			in sequence) at which to store.  Defaults to next available space
+     *			(or 0 if <continue> is 0).
+     *      select	Select what category(ies) of registers to store, as a bitmask
+     *			(see XTHAL_SAS_xxx constants).  Defaults to all registers.
+     *      alloc	Select what category(ies) of registers to allocate; if any
+     *			category is selected here that is not in <select>, space for
+     *			the corresponding registers is skipped without doing any store.
+     */
+    .macro xchal_ncp_store  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
+	xchal_sa_start	\continue, \ofs
+	// Optional global register used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1020, 4, 4
+	rur.THREADPTR	\at1		// threadptr option
+	s32i	\at1, \ptr, .Lxchal_ofs_+0
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1020, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	// Optional caller-saved registers used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	rsr	\at1, ACCLO			// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+0
+	rsr	\at1, ACCHI			// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.endif
+	// Optional caller-saved registers not used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1004, 4, 4
+	rsr	\at1, M0			// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+0
+	rsr	\at1, M1			// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+4
+	rsr	\at1, M2			// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+8
+	rsr	\at1, M3			// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+12
+	rsr	\at1, SCOMPARE1			// conditional store option
+	s32i	\at1, \ptr, .Lxchal_ofs_+16
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 20
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1004, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 20
+	.endif
+    .endm	// xchal_ncp_store
+
+    /*
+     *  Macro to restore all non-coprocessor (extra) custom TIE and optional state
+     *  (not including zero-overhead loop registers).
+     *  Required parameters:
+     *      ptr		Save area pointer address register (clobbered)
+     *			(register must contain a 4 byte aligned address).
+     *      at1..at4	Four temporary address registers (first XCHAL_NCP_NUM_ATMPS
+     *			registers are clobbered, the remaining are unused).
+     *  Optional parameters:
+     *      continue	If macro invoked as part of a larger load sequence, set to 1
+     *			if this is not the first in the sequence.  Defaults to 0.
+     *      ofs		Offset from start of larger sequence (from value of first ptr
+     *			in sequence) at which to load.  Defaults to next available space
+     *			(or 0 if <continue> is 0).
+     *      select	Select what category(ies) of registers to load, as a bitmask
+     *			(see XTHAL_SAS_xxx constants).  Defaults to all registers.
+     *      alloc	Select what category(ies) of registers to allocate; if any
+     *			category is selected here that is not in <select>, space for
+     *			the corresponding registers is skipped without doing any load.
+     */
+    .macro xchal_ncp_load  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
+	xchal_sa_start	\continue, \ofs
+	// Optional global register used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1020, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_+0
+	wur.THREADPTR	\at1		// threadptr option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1020, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	// Optional caller-saved registers used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_+0
+	wsr	\at1, ACCLO			// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+4
+	wsr	\at1, ACCHI			// MAC16 option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.endif
+	// Optional caller-saved registers not used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1004, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_+0
+	wsr	\at1, M0			// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+4
+	wsr	\at1, M1			// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+8
+	wsr	\at1, M2			// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+12
+	wsr	\at1, M3			// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+16
+	wsr	\at1, SCOMPARE1			// conditional store option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 20
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1004, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 20
+	.endif
+    .endm	// xchal_ncp_load
+
+
+#define XCHAL_NCP_NUM_ATMPS	1
+
+
+
+#define XCHAL_SA_NUM_ATMPS	1
+
+#endif /*_XTENSA_CORE_TIE_ASM_H*/
+
diff --git a/arch/xtensa/variants/dc233c/include/variant/tie.h b/arch/xtensa/variants/dc233c/include/variant/tie.h
new file mode 100644
index 000000000..815e52bc3
--- /dev/null
+++ b/arch/xtensa/variants/dc233c/include/variant/tie.h
@@ -0,0 +1,150 @@
+/* 
+ * tie.h -- compile-time HAL definitions dependent on CORE & TIE configuration
+ *
+ *  NOTE:  This header file is not meant to be included directly.
+ */
+
+/* This header file describes this specific Xtensa processor's TIE extensions
+   that extend basic Xtensa core functionality.  It is customized to this
+   Xtensa processor configuration.
+
+   Copyright (c) 1999-2010 Tensilica Inc.
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be included
+   in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _XTENSA_CORE_TIE_H
+#define _XTENSA_CORE_TIE_H
+
+#define XCHAL_CP_NUM			1	/* number of coprocessors */
+#define XCHAL_CP_MAX			8	/* max CP ID + 1 (0 if none) */
+#define XCHAL_CP_MASK			0x80	/* bitmask of all CPs by ID */
+#define XCHAL_CP_PORT_MASK		0x80	/* bitmask of only port CPs */
+
+/*  Basic parameters of each coprocessor:  */
+#define XCHAL_CP7_NAME			"XTIOP"
+#define XCHAL_CP7_IDENT			XTIOP
+#define XCHAL_CP7_SA_SIZE		0	/* size of state save area */
+#define XCHAL_CP7_SA_ALIGN		1	/* min alignment of save area */
+#define XCHAL_CP_ID_XTIOP		7	/* coprocessor ID (0..7) */
+
+/*  Filler info for unassigned coprocessors, to simplify arrays etc:  */
+#define XCHAL_CP0_SA_SIZE		0
+#define XCHAL_CP0_SA_ALIGN		1
+#define XCHAL_CP1_SA_SIZE		0
+#define XCHAL_CP1_SA_ALIGN		1
+#define XCHAL_CP2_SA_SIZE		0
+#define XCHAL_CP2_SA_ALIGN		1
+#define XCHAL_CP3_SA_SIZE		0
+#define XCHAL_CP3_SA_ALIGN		1
+#define XCHAL_CP4_SA_SIZE		0
+#define XCHAL_CP4_SA_ALIGN		1
+#define XCHAL_CP5_SA_SIZE		0
+#define XCHAL_CP5_SA_ALIGN		1
+#define XCHAL_CP6_SA_SIZE		0
+#define XCHAL_CP6_SA_ALIGN		1
+
+/*  Save area for non-coprocessor optional and custom (TIE) state:  */
+#define XCHAL_NCP_SA_SIZE		32
+#define XCHAL_NCP_SA_ALIGN		4
+
+/*  Total save area for optional and custom state (NCP + CPn):  */
+#define XCHAL_TOTAL_SA_SIZE		32	/* with 16-byte align padding */
+#define XCHAL_TOTAL_SA_ALIGN		4	/* actual minimum alignment */
+
+/*
+ * Detailed contents of save areas.
+ * NOTE:  caller must define the XCHAL_SA_REG macro (not defined here)
+ * before expanding the XCHAL_xxx_SA_LIST() macros.
+ *
+ * XCHAL_SA_REG(s,ccused,abikind,kind,opt,name,galign,align,asize,
+ *		dbnum,base,regnum,bitsz,gapsz,reset,x...)
+ *
+ *	s = passed from XCHAL_*_LIST(s), eg. to select how to expand
+ *	ccused = set if used by compiler without special options or code
+ *	abikind = 0 (caller-saved), 1 (callee-saved), or 2 (thread-global)
+ *	kind = 0 (special reg), 1 (TIE user reg), or 2 (TIE regfile reg)
+ *	opt = 0 (custom TIE extension or coprocessor), or 1 (optional reg)
+ *	name = lowercase reg name (no quotes)
+ *	galign = group byte alignment (power of 2) (galign >= align)
+ *	align = register byte alignment (power of 2)
+ *	asize = allocated size in bytes (asize*8 == bitsz + gapsz + padsz)
+ *	  (not including any pad bytes required to galign this or next reg)
+ *	dbnum = unique target number f/debug (see <xtensa-libdb-macros.h>)
+ *	base = reg shortname w/o index (or sr=special, ur=TIE user reg)
+ *	regnum = reg index in regfile, or special/TIE-user reg number
+ *	bitsz = number of significant bits (regfile width, or ur/sr mask bits)
+ *	gapsz = intervening bits, if bitsz bits not stored contiguously
+ *	(padsz = pad bits at end [TIE regfile] or at msbits [ur,sr] of asize)
+ *	reset = register reset value (or 0 if undefined at reset)
+ *	x = reserved for future use (0 until then)
+ *
+ *  To filter out certain registers, e.g. to expand only the non-global
+ *  registers used by the compiler, you can do something like this:
+ *
+ *  #define XCHAL_SA_REG(s,ccused,p...)	SELCC##ccused(p)
+ *  #define SELCC0(p...)
+ *  #define SELCC1(abikind,p...)	SELAK##abikind(p)
+ *  #define SELAK0(p...)		REG(p)
+ *  #define SELAK1(p...)		REG(p)
+ *  #define SELAK2(p...)
+ *  #define REG(kind,tie,name,galn,aln,asz,csz,dbnum,base,rnum,bsz,rst,x...) \
+ *		...what you want to expand...
+ */
+
+#define XCHAL_NCP_SA_NUM	8
+#define XCHAL_NCP_SA_LIST(s)	\
+ XCHAL_SA_REG(s,1,2,1,1,      threadptr, 4, 4, 4,0x03E7,  ur,231, 32,0,0,0) \
+ XCHAL_SA_REG(s,1,0,0,1,          acclo, 4, 4, 4,0x0210,  sr,16 , 32,0,0,0) \
+ XCHAL_SA_REG(s,1,0,0,1,          acchi, 4, 4, 4,0x0211,  sr,17 ,  8,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m0, 4, 4, 4,0x0220,  sr,32 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m1, 4, 4, 4,0x0221,  sr,33 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m2, 4, 4, 4,0x0222,  sr,34 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m3, 4, 4, 4,0x0223,  sr,35 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,      scompare1, 4, 4, 4,0x020C,  sr,12 , 32,0,0,0)
+
+#define XCHAL_CP0_SA_NUM	0
+#define XCHAL_CP0_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP1_SA_NUM	0
+#define XCHAL_CP1_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP2_SA_NUM	0
+#define XCHAL_CP2_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP3_SA_NUM	0
+#define XCHAL_CP3_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP4_SA_NUM	0
+#define XCHAL_CP4_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP5_SA_NUM	0
+#define XCHAL_CP5_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP6_SA_NUM	0
+#define XCHAL_CP6_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP7_SA_NUM	0
+#define XCHAL_CP7_SA_LIST(s)	/* empty */
+
+/* Byte length of instruction from its first nibble (op0 field), per FLIX.  */
+#define XCHAL_OP0_FORMAT_LENGTHS	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3
+
+#endif /*_XTENSA_CORE_TIE_H*/
+
diff --git a/arch/xtensa/variants/de212/include/variant/core.h b/arch/xtensa/variants/de212/include/variant/core.h
new file mode 100644
index 000000000..59e91e47e
--- /dev/null
+++ b/arch/xtensa/variants/de212/include/variant/core.h
@@ -0,0 +1,594 @@
+/* 
+ * xtensa/config/core-isa.h -- HAL definitions that are dependent on Xtensa
+ *				processor CORE configuration
+ *
+ *  See <xtensa/config/core.h>, which includes this file, for more details.
+ */
+
+/* Xtensa processor core configuration information.
+
+   Copyright (c) 1999-2015 Tensilica Inc.
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be included
+   in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _XTENSA_CORE_CONFIGURATION_H
+#define _XTENSA_CORE_CONFIGURATION_H
+
+
+/****************************************************************************
+	    Parameters Useful for Any Code, USER or PRIVILEGED
+ ****************************************************************************/
+
+/*
+ *  Note:  Macros of the form XCHAL_HAVE_*** have a value of 1 if the option is
+ *  configured, and a value of 0 otherwise.  These macros are always defined.
+ */
+
+
+/*----------------------------------------------------------------------
+				ISA
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_BE			0	/* big-endian byte ordering */
+#define XCHAL_HAVE_WINDOWED		1	/* windowed registers option */
+#define XCHAL_NUM_AREGS			32	/* num of physical addr regs */
+#define XCHAL_NUM_AREGS_LOG2		5	/* log2(XCHAL_NUM_AREGS) */
+#define XCHAL_MAX_INSTRUCTION_SIZE	3	/* max instr bytes (3..8) */
+#define XCHAL_HAVE_DEBUG		1	/* debug option */
+#define XCHAL_HAVE_DENSITY		1	/* 16-bit instructions */
+#define XCHAL_HAVE_LOOPS		1	/* zero-overhead loops */
+#define XCHAL_LOOP_BUFFER_SIZE		0	/* zero-ov. loop instr buffer size */
+#define XCHAL_HAVE_NSA			1	/* NSA/NSAU instructions */
+#define XCHAL_HAVE_MINMAX		1	/* MIN/MAX instructions */
+#define XCHAL_HAVE_SEXT			1	/* SEXT instruction */
+#define XCHAL_HAVE_DEPBITS		0	/* DEPBITS instruction */
+#define XCHAL_HAVE_CLAMPS		1	/* CLAMPS instruction */
+#define XCHAL_HAVE_MUL16		1	/* MUL16S/MUL16U instructions */
+#define XCHAL_HAVE_MUL32		1	/* MULL instruction */
+#define XCHAL_HAVE_MUL32_HIGH		0	/* MULUH/MULSH instructions */
+#define XCHAL_HAVE_DIV32		1	/* QUOS/QUOU/REMS/REMU instructions */
+#define XCHAL_HAVE_L32R			1	/* L32R instruction */
+#define XCHAL_HAVE_ABSOLUTE_LITERALS	0	/* non-PC-rel (extended) L32R */
+#define XCHAL_HAVE_CONST16		0	/* CONST16 instruction */
+#define XCHAL_HAVE_ADDX			1	/* ADDX#/SUBX# instructions */
+#define XCHAL_HAVE_WIDE_BRANCHES	0	/* B*.W18 or B*.W15 instr's */
+#define XCHAL_HAVE_PREDICTED_BRANCHES	0	/* B[EQ/EQZ/NE/NEZ]T instr's */
+#define XCHAL_HAVE_CALL4AND12		1	/* (obsolete option) */
+#define XCHAL_HAVE_ABS			1	/* ABS instruction */
+/*#define XCHAL_HAVE_POPC		0*/	/* POPC instruction */
+/*#define XCHAL_HAVE_CRC		0*/	/* CRC instruction */
+#define XCHAL_HAVE_RELEASE_SYNC		1	/* L32AI/S32RI instructions */
+#define XCHAL_HAVE_S32C1I		1	/* S32C1I instruction */
+#define XCHAL_HAVE_SPECULATION		0	/* speculation */
+#define XCHAL_HAVE_FULL_RESET		1	/* all regs/state reset */
+#define XCHAL_NUM_CONTEXTS		1	/* */
+#define XCHAL_NUM_MISC_REGS		2	/* num of scratch regs (0..4) */
+#define XCHAL_HAVE_TAP_MASTER		0	/* JTAG TAP control instr's */
+#define XCHAL_HAVE_PRID			1	/* processor ID register */
+#define XCHAL_HAVE_EXTERN_REGS		1	/* WER/RER instructions */
+#define XCHAL_HAVE_MX			0	/* MX core (Tensilica internal) */
+#define XCHAL_HAVE_MP_INTERRUPTS	0	/* interrupt distributor port */
+#define XCHAL_HAVE_MP_RUNSTALL		0	/* core RunStall control port */
+#define XCHAL_HAVE_PSO			0	/* Power Shut-Off */
+#define XCHAL_HAVE_PSO_CDM		0	/* core/debug/mem pwr domains */
+#define XCHAL_HAVE_PSO_FULL_RETENTION	0	/* all regs preserved on PSO */
+#define XCHAL_HAVE_THREADPTR		0	/* THREADPTR register */
+#define XCHAL_HAVE_BOOLEANS		0	/* boolean registers */
+#define XCHAL_HAVE_CP			0	/* CPENABLE reg (coprocessor) */
+#define XCHAL_CP_MAXCFG			0	/* max allowed cp id plus one */
+#define XCHAL_HAVE_MAC16		1	/* MAC16 package */
+
+#define XCHAL_HAVE_FUSION		 0	/* Fusion*/
+#define XCHAL_HAVE_FUSION_FP	 0	        /* Fusion FP option */
+#define XCHAL_HAVE_FUSION_LOW_POWER 0	/* Fusion Low Power option */
+#define XCHAL_HAVE_FUSION_AES	 0	        /* Fusion BLE/Wifi AES-128 CCM option */
+#define XCHAL_HAVE_FUSION_CONVENC	 0       /* Fusion Conv Encode option */
+#define XCHAL_HAVE_FUSION_LFSR_CRC	 0	/* Fusion LFSR-CRC option */
+#define XCHAL_HAVE_FUSION_BITOPS	 0	/* Fusion Bit Operations Support option */
+#define XCHAL_HAVE_FUSION_AVS	 0	/* Fusion AVS option */
+#define XCHAL_HAVE_FUSION_16BIT_BASEBAND	 0	/* Fusion 16-bit Baseband option */
+#define XCHAL_HAVE_HIFIPRO		0	/* HiFiPro Audio Engine pkg */
+#define XCHAL_HAVE_HIFI4		0	/* HiFi4 Audio Engine pkg */
+#define XCHAL_HAVE_HIFI4_VFPU		0	/* HiFi4 Audio Engine VFPU option */
+#define XCHAL_HAVE_HIFI3		0	/* HiFi3 Audio Engine pkg */
+#define XCHAL_HAVE_HIFI3_VFPU		0	/* HiFi3 Audio Engine VFPU option */
+#define XCHAL_HAVE_HIFI2		0	/* HiFi2 Audio Engine pkg */
+#define XCHAL_HAVE_HIFI2EP		0	/* HiFi2EP */
+#define XCHAL_HAVE_HIFI_MINI		0	
+
+
+#define XCHAL_HAVE_VECTORFPU2005	0	/* vector or user floating-point pkg */
+#define XCHAL_HAVE_USER_DPFPU         0       /* user DP floating-point pkg */
+#define XCHAL_HAVE_USER_SPFPU         0       /* user DP floating-point pkg */
+#define XCHAL_HAVE_FP                 0      /* single prec floating point */
+#define XCHAL_HAVE_FP_DIV             0  /* FP with DIV instructions */
+#define XCHAL_HAVE_FP_RECIP           0        /* FP with RECIP instructions */
+#define XCHAL_HAVE_FP_SQRT            0 /* FP with SQRT instructions */
+#define XCHAL_HAVE_FP_RSQRT           0        /* FP with RSQRT instructions */
+#define XCHAL_HAVE_DFP                        0     /* double precision FP pkg */
+#define XCHAL_HAVE_DFP_DIV            0 /* DFP with DIV instructions */
+#define XCHAL_HAVE_DFP_RECIP          0       /* DFP with RECIP instructions*/
+#define XCHAL_HAVE_DFP_SQRT           0        /* DFP with SQRT instructions */
+#define XCHAL_HAVE_DFP_RSQRT          0       /* DFP with RSQRT instructions*/
+#define XCHAL_HAVE_DFP_ACCEL		0	/* double precision FP acceleration pkg */
+#define XCHAL_HAVE_DFP_accel		XCHAL_HAVE_DFP_ACCEL				/* for backward compatibility */
+
+#define XCHAL_HAVE_DFPU_SINGLE_ONLY    0                 	/* DFPU Coprocessor, single precision only */
+#define XCHAL_HAVE_DFPU_SINGLE_DOUBLE  0               	/* DFPU Coprocessor, single and double precision */
+#define XCHAL_HAVE_VECTRA1		0	/* Vectra I  pkg */
+#define XCHAL_HAVE_VECTRALX		0	/* Vectra LX pkg */
+#define XCHAL_HAVE_PDX4		        0	/* PDX4 */
+#define XCHAL_HAVE_CONNXD2		0	/* ConnX D2 pkg */
+#define XCHAL_HAVE_CONNXD2_DUALLSFLIX   0	/* ConnX D2 & Dual LoadStore Flix */
+#define XCHAL_HAVE_BBE16		0	/* ConnX BBE16 pkg */
+#define XCHAL_HAVE_BBE16_RSQRT		0	/* BBE16 & vector recip sqrt */
+#define XCHAL_HAVE_BBE16_VECDIV		0	/* BBE16 & vector divide */
+#define XCHAL_HAVE_BBE16_DESPREAD	0	/* BBE16 & despread */
+#define XCHAL_HAVE_BBENEP		0	/* ConnX BBENEP pkgs */
+#define XCHAL_HAVE_BSP3			0	/* ConnX BSP3 pkg */
+#define XCHAL_HAVE_BSP3_TRANSPOSE	0	/* BSP3 & transpose32x32 */
+#define XCHAL_HAVE_SSP16		0	/* ConnX SSP16 pkg */
+#define XCHAL_HAVE_SSP16_VITERBI	0	/* SSP16 & viterbi */
+#define XCHAL_HAVE_TURBO16		0	/* ConnX Turbo16 pkg */
+#define XCHAL_HAVE_BBP16		0	/* ConnX BBP16 pkg */
+#define XCHAL_HAVE_FLIX3		0	/* basic 3-way FLIX option */
+#define XCHAL_HAVE_GRIVPEP              0   /*  GRIVPEP is General Release of IVPEP */
+#define XCHAL_HAVE_GRIVPEP_HISTOGRAM    0   /* Histogram option on GRIVPEP */
+
+
+/*----------------------------------------------------------------------
+				MISC
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_LOADSTORE_UNITS	1	/* load/store units */
+#define XCHAL_NUM_WRITEBUFFER_ENTRIES	8	/* size of write buffer */
+#define XCHAL_INST_FETCH_WIDTH		4	/* instr-fetch width in bytes */
+#define XCHAL_DATA_WIDTH		4	/* data width in bytes */
+#define XCHAL_DATA_PIPE_DELAY		1	/* d-side pipeline delay
+						   (1 = 5-stage, 2 = 7-stage) */
+#define XCHAL_CLOCK_GATING_GLOBAL	0	/* global clock gating */
+#define XCHAL_CLOCK_GATING_FUNCUNIT	0	/* funct. unit clock gating */
+/*  In T1050, applies to selected core load and store instructions (see ISA): */
+#define XCHAL_UNALIGNED_LOAD_EXCEPTION	1	/* unaligned loads cause exc. */
+#define XCHAL_UNALIGNED_STORE_EXCEPTION	1	/* unaligned stores cause exc.*/
+#define XCHAL_UNALIGNED_LOAD_HW		0	/* unaligned loads work in hw */
+#define XCHAL_UNALIGNED_STORE_HW	0	/* unaligned stores work in hw*/
+
+#define XCHAL_SW_VERSION		1100002	/* sw version of this header */
+
+#define XCHAL_CORE_ID			"de212"	/* alphanum core name
+						   (CoreID) set in the Xtensa
+						   Processor Generator */
+
+#define XCHAL_BUILD_UNIQUE_ID		0x0005A985	/* 22-bit sw build ID */
+
+/*
+ *  These definitions describe the hardware targeted by this software.
+ */
+#define XCHAL_HW_CONFIGID0		0xC283DFFE	/* ConfigID hi 32 bits*/
+#define XCHAL_HW_CONFIGID1		0x1C85A985	/* ConfigID lo 32 bits*/
+#define XCHAL_HW_VERSION_NAME		"LX6.0.2"	/* full version name */
+#define XCHAL_HW_VERSION_MAJOR		2600	/* major ver# of targeted hw */
+#define XCHAL_HW_VERSION_MINOR		2	/* minor ver# of targeted hw */
+#define XCHAL_HW_VERSION		260002	/* major*100+minor */
+#define XCHAL_HW_REL_LX6		1
+#define XCHAL_HW_REL_LX6_0		1
+#define XCHAL_HW_REL_LX6_0_2		1
+#define XCHAL_HW_CONFIGID_RELIABLE	1
+/*  If software targets a *range* of hardware versions, these are the bounds: */
+#define XCHAL_HW_MIN_VERSION_MAJOR	2600	/* major v of earliest tgt hw */
+#define XCHAL_HW_MIN_VERSION_MINOR	2	/* minor v of earliest tgt hw */
+#define XCHAL_HW_MIN_VERSION		260002	/* earliest targeted hw */
+#define XCHAL_HW_MAX_VERSION_MAJOR	2600	/* major v of latest tgt hw */
+#define XCHAL_HW_MAX_VERSION_MINOR	2	/* minor v of latest tgt hw */
+#define XCHAL_HW_MAX_VERSION		260002	/* latest targeted hw */
+
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_ICACHE_LINESIZE		32	/* I-cache line size in bytes */
+#define XCHAL_DCACHE_LINESIZE		32	/* D-cache line size in bytes */
+#define XCHAL_ICACHE_LINEWIDTH		5	/* log2(I line size in bytes) */
+#define XCHAL_DCACHE_LINEWIDTH		5	/* log2(D line size in bytes) */
+
+#define XCHAL_ICACHE_SIZE		8192	/* I-cache size in bytes or 0 */
+#define XCHAL_DCACHE_SIZE		8192	/* D-cache size in bytes or 0 */
+
+#define XCHAL_DCACHE_IS_WRITEBACK	1	/* writeback feature */
+#define XCHAL_DCACHE_IS_COHERENT	0	/* MP coherence feature */
+
+#define XCHAL_HAVE_PREFETCH		0	/* PREFCTL register */
+#define XCHAL_HAVE_PREFETCH_L1		0	/* prefetch to L1 dcache */
+#define XCHAL_PREFETCH_CASTOUT_LINES	0	/* dcache pref. castout bufsz */
+#define XCHAL_PREFETCH_ENTRIES		0	/* cache prefetch entries */
+#define XCHAL_PREFETCH_BLOCK_ENTRIES	0	/* prefetch block streams */
+#define XCHAL_HAVE_CACHE_BLOCKOPS	0	/* block prefetch for caches */
+#define XCHAL_HAVE_ICACHE_TEST		1	/* Icache test instructions */
+#define XCHAL_HAVE_DCACHE_TEST		1	/* Dcache test instructions */
+#define XCHAL_HAVE_ICACHE_DYN_WAYS	0	/* Icache dynamic way support */
+#define XCHAL_HAVE_DCACHE_DYN_WAYS	0	/* Dcache dynamic way support */
+
+
+
+
+/****************************************************************************
+    Parameters Useful for PRIVILEGED (Supervisory or Non-Virtualized) Code
+ ****************************************************************************/
+
+
+#ifndef XTENSA_HAL_NON_PRIVILEGED_ONLY
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_PIF			1	/* any outbound PIF present */
+
+/*  If present, cache size in bytes == (ways * 2^(linewidth + setwidth)).  */
+
+/*  Number of cache sets in log2(lines per way):  */
+#define XCHAL_ICACHE_SETWIDTH		7
+#define XCHAL_DCACHE_SETWIDTH		7
+
+/*  Cache set associativity (number of ways):  */
+#define XCHAL_ICACHE_WAYS		2
+#define XCHAL_DCACHE_WAYS		2
+
+/*  Cache features:  */
+#define XCHAL_ICACHE_LINE_LOCKABLE	1
+#define XCHAL_DCACHE_LINE_LOCKABLE	1
+#define XCHAL_ICACHE_ECC_PARITY		0
+#define XCHAL_DCACHE_ECC_PARITY		0
+
+/*  Cache access size in bytes (affects operation of SICW instruction):  */
+#define XCHAL_ICACHE_ACCESS_SIZE	4
+#define XCHAL_DCACHE_ACCESS_SIZE	4
+
+#define XCHAL_DCACHE_BANKS		1	/* number of banks */
+
+/*  Number of encoded cache attr bits (see <xtensa/hal.h> for decoded bits):  */
+#define XCHAL_CA_BITS			4
+
+/*  Whether MEMCTL register has anything useful  */
+#define XCHAL_USE_MEMCTL		(((XCHAL_LOOP_BUFFER_SIZE > 0)	||	\
+					   XCHAL_DCACHE_IS_COHERENT	||	\
+					   XCHAL_HAVE_ICACHE_DYN_WAYS	||	\
+					   XCHAL_HAVE_DCACHE_DYN_WAYS)	&&	\
+					   (XCHAL_HW_MIN_VERSION >= XTENSA_HWVERSION_RE_2012_0))
+
+
+/*----------------------------------------------------------------------
+			INTERNAL I/D RAM/ROMs and XLMI
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_INSTROM		0	/* number of core instr. ROMs */
+#define XCHAL_NUM_INSTRAM		1	/* number of core instr. RAMs */
+#define XCHAL_NUM_DATAROM		0	/* number of core data ROMs */
+#define XCHAL_NUM_DATARAM		1	/* number of core data RAMs */
+#define XCHAL_NUM_URAM			0	/* number of core unified RAMs*/
+#define XCHAL_NUM_XLMI			1	/* number of core XLMI ports */
+
+/*  Instruction RAM 0:  */
+#define XCHAL_INSTRAM0_VADDR		0x40000000	/* virtual address */
+#define XCHAL_INSTRAM0_PADDR		0x40000000	/* physical address */
+#define XCHAL_INSTRAM0_SIZE		131072	/* size in bytes */
+#define XCHAL_INSTRAM0_ECC_PARITY	0	/* ECC/parity type, 0=none */
+
+/*  Data RAM 0:  */
+#define XCHAL_DATARAM0_VADDR		0x3FFE0000	/* virtual address */
+#define XCHAL_DATARAM0_PADDR		0x3FFE0000	/* physical address */
+#define XCHAL_DATARAM0_SIZE		131072	/* size in bytes */
+#define XCHAL_DATARAM0_ECC_PARITY	0	/* ECC/parity type, 0=none */
+#define XCHAL_DATARAM0_BANKS		1	/* number of banks */
+
+/*  XLMI Port 0:  */
+#define XCHAL_XLMI0_VADDR		0x3FFC0000	/* virtual address */
+#define XCHAL_XLMI0_PADDR		0x3FFC0000	/* physical address */
+#define XCHAL_XLMI0_SIZE		131072	/* size in bytes */
+#define XCHAL_XLMI0_ECC_PARITY	0	/* ECC/parity type, 0=none */
+
+#define XCHAL_HAVE_IMEM_LOADSTORE	1	/* can load/store to IROM/IRAM*/
+
+
+/*----------------------------------------------------------------------
+			INTERRUPTS and TIMERS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_INTERRUPTS		1	/* interrupt option */
+#define XCHAL_HAVE_HIGHPRI_INTERRUPTS	1	/* med/high-pri. interrupts */
+#define XCHAL_HAVE_NMI			1	/* non-maskable interrupt */
+#define XCHAL_HAVE_CCOUNT		1	/* CCOUNT reg. (timer option) */
+#define XCHAL_NUM_TIMERS		3	/* number of CCOMPAREn regs */
+#define XCHAL_NUM_INTERRUPTS		22	/* number of interrupts */
+#define XCHAL_NUM_INTERRUPTS_LOG2	5	/* ceil(log2(NUM_INTERRUPTS)) */
+#define XCHAL_NUM_EXTINTERRUPTS		17	/* num of external interrupts */
+#define XCHAL_NUM_INTLEVELS		6	/* number of interrupt levels
+						   (not including level zero) */
+#define XCHAL_EXCM_LEVEL		3	/* level masked by PS.EXCM */
+	/* (always 1 in XEA1; levels 2 .. EXCM_LEVEL are "medium priority") */
+
+/*  Masks of interrupts at each interrupt level:  */
+#define XCHAL_INTLEVEL1_MASK		0x001F80FF
+#define XCHAL_INTLEVEL2_MASK		0x00000100
+#define XCHAL_INTLEVEL3_MASK		0x00200E00
+#define XCHAL_INTLEVEL4_MASK		0x00001000
+#define XCHAL_INTLEVEL5_MASK		0x00002000
+#define XCHAL_INTLEVEL6_MASK		0x00000000
+#define XCHAL_INTLEVEL7_MASK		0x00004000
+
+/*  Masks of interrupts at each range 1..n of interrupt levels:  */
+#define XCHAL_INTLEVEL1_ANDBELOW_MASK	0x001F80FF
+#define XCHAL_INTLEVEL2_ANDBELOW_MASK	0x001F81FF
+#define XCHAL_INTLEVEL3_ANDBELOW_MASK	0x003F8FFF
+#define XCHAL_INTLEVEL4_ANDBELOW_MASK	0x003F9FFF
+#define XCHAL_INTLEVEL5_ANDBELOW_MASK	0x003FBFFF
+#define XCHAL_INTLEVEL6_ANDBELOW_MASK	0x003FBFFF
+#define XCHAL_INTLEVEL7_ANDBELOW_MASK	0x003FFFFF
+
+/*  Level of each interrupt:  */
+#define XCHAL_INT0_LEVEL		1
+#define XCHAL_INT1_LEVEL		1
+#define XCHAL_INT2_LEVEL		1
+#define XCHAL_INT3_LEVEL		1
+#define XCHAL_INT4_LEVEL		1
+#define XCHAL_INT5_LEVEL		1
+#define XCHAL_INT6_LEVEL		1
+#define XCHAL_INT7_LEVEL		1
+#define XCHAL_INT8_LEVEL		2
+#define XCHAL_INT9_LEVEL		3
+#define XCHAL_INT10_LEVEL		3
+#define XCHAL_INT11_LEVEL		3
+#define XCHAL_INT12_LEVEL		4
+#define XCHAL_INT13_LEVEL		5
+#define XCHAL_INT14_LEVEL		7
+#define XCHAL_INT15_LEVEL		1
+#define XCHAL_INT16_LEVEL		1
+#define XCHAL_INT17_LEVEL		1
+#define XCHAL_INT18_LEVEL		1
+#define XCHAL_INT19_LEVEL		1
+#define XCHAL_INT20_LEVEL		1
+#define XCHAL_INT21_LEVEL		3
+#define XCHAL_DEBUGLEVEL		6	/* debug interrupt level */
+#define XCHAL_HAVE_DEBUG_EXTERN_INT	1	/* OCD external db interrupt */
+#define XCHAL_NMILEVEL			7	/* NMI "level" (for use with
+						   EXCSAVE/EPS/EPC_n, RFI n) */
+
+/*  Type of each interrupt:  */
+#define XCHAL_INT0_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT1_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT2_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT3_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT4_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT5_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT6_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT7_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT8_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT9_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT10_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT11_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT12_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT13_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT14_TYPE 	XTHAL_INTTYPE_NMI
+#define XCHAL_INT15_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT16_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT17_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT18_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT19_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT20_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT21_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+
+/*  Masks of interrupts for each type of interrupt:  */
+#define XCHAL_INTTYPE_MASK_UNCONFIGURED	0xFFC00000
+#define XCHAL_INTTYPE_MASK_SOFTWARE	0x00000880
+#define XCHAL_INTTYPE_MASK_EXTERN_EDGE	0x003F8000
+#define XCHAL_INTTYPE_MASK_EXTERN_LEVEL	0x0000133F
+#define XCHAL_INTTYPE_MASK_TIMER	0x00002440
+#define XCHAL_INTTYPE_MASK_NMI		0x00004000
+#define XCHAL_INTTYPE_MASK_WRITE_ERROR	0x00000000
+#define XCHAL_INTTYPE_MASK_PROFILING	0x00000000
+
+/*  Interrupt numbers assigned to specific interrupt sources:  */
+#define XCHAL_TIMER0_INTERRUPT		6	/* CCOMPARE0 */
+#define XCHAL_TIMER1_INTERRUPT		10	/* CCOMPARE1 */
+#define XCHAL_TIMER2_INTERRUPT		13	/* CCOMPARE2 */
+#define XCHAL_TIMER3_INTERRUPT		XTHAL_TIMER_UNCONFIGURED
+#define XCHAL_NMI_INTERRUPT		14	/* non-maskable interrupt */
+
+/*  Interrupt numbers for levels at which only one interrupt is configured:  */
+#define XCHAL_INTLEVEL2_NUM		8
+#define XCHAL_INTLEVEL4_NUM		12
+#define XCHAL_INTLEVEL5_NUM		13
+#define XCHAL_INTLEVEL7_NUM		14
+/*  (There are many interrupts each at level(s) 1, 3.)  */
+
+
+/*
+ *  External interrupt mapping.
+ *  These macros describe how Xtensa processor interrupt numbers
+ *  (as numbered internally, eg. in INTERRUPT and INTENABLE registers)
+ *  map to external BInterrupt<n> pins, for those interrupts
+ *  configured as external (level-triggered, edge-triggered, or NMI).
+ *  See the Xtensa processor databook for more details.
+ */
+
+/*  Core interrupt numbers mapped to each EXTERNAL BInterrupt pin number:  */
+#define XCHAL_EXTINT0_NUM		0	/* (intlevel 1) */
+#define XCHAL_EXTINT1_NUM		1	/* (intlevel 1) */
+#define XCHAL_EXTINT2_NUM		2	/* (intlevel 1) */
+#define XCHAL_EXTINT3_NUM		3	/* (intlevel 1) */
+#define XCHAL_EXTINT4_NUM		4	/* (intlevel 1) */
+#define XCHAL_EXTINT5_NUM		5	/* (intlevel 1) */
+#define XCHAL_EXTINT6_NUM		8	/* (intlevel 2) */
+#define XCHAL_EXTINT7_NUM		9	/* (intlevel 3) */
+#define XCHAL_EXTINT8_NUM		12	/* (intlevel 4) */
+#define XCHAL_EXTINT9_NUM		14	/* (intlevel 7) */
+#define XCHAL_EXTINT10_NUM		15	/* (intlevel 1) */
+#define XCHAL_EXTINT11_NUM		16	/* (intlevel 1) */
+#define XCHAL_EXTINT12_NUM		17	/* (intlevel 1) */
+#define XCHAL_EXTINT13_NUM		18	/* (intlevel 1) */
+#define XCHAL_EXTINT14_NUM		19	/* (intlevel 1) */
+#define XCHAL_EXTINT15_NUM		20	/* (intlevel 1) */
+#define XCHAL_EXTINT16_NUM		21	/* (intlevel 3) */
+/*  EXTERNAL BInterrupt pin numbers mapped to each core interrupt number:  */
+#define XCHAL_INT0_EXTNUM		0	/* (intlevel 1) */
+#define XCHAL_INT1_EXTNUM		1	/* (intlevel 1) */
+#define XCHAL_INT2_EXTNUM		2	/* (intlevel 1) */
+#define XCHAL_INT3_EXTNUM		3	/* (intlevel 1) */
+#define XCHAL_INT4_EXTNUM		4	/* (intlevel 1) */
+#define XCHAL_INT5_EXTNUM		5	/* (intlevel 1) */
+#define XCHAL_INT8_EXTNUM		6	/* (intlevel 2) */
+#define XCHAL_INT9_EXTNUM		7	/* (intlevel 3) */
+#define XCHAL_INT12_EXTNUM		8	/* (intlevel 4) */
+#define XCHAL_INT14_EXTNUM		9	/* (intlevel 7) */
+#define XCHAL_INT15_EXTNUM		10	/* (intlevel 1) */
+#define XCHAL_INT16_EXTNUM		11	/* (intlevel 1) */
+#define XCHAL_INT17_EXTNUM		12	/* (intlevel 1) */
+#define XCHAL_INT18_EXTNUM		13	/* (intlevel 1) */
+#define XCHAL_INT19_EXTNUM		14	/* (intlevel 1) */
+#define XCHAL_INT20_EXTNUM		15	/* (intlevel 1) */
+#define XCHAL_INT21_EXTNUM		16	/* (intlevel 3) */
+
+
+/*----------------------------------------------------------------------
+			EXCEPTIONS and VECTORS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_XEA_VERSION		2	/* Xtensa Exception Architecture
+						   number: 1 == XEA1 (old)
+							   2 == XEA2 (new)
+							   0 == XEAX (extern) or TX */
+#define XCHAL_HAVE_XEA1			0	/* Exception Architecture 1 */
+#define XCHAL_HAVE_XEA2			1	/* Exception Architecture 2 */
+#define XCHAL_HAVE_XEAX			0	/* External Exception Arch. */
+#define XCHAL_HAVE_EXCEPTIONS		1	/* exception option */
+#define XCHAL_HAVE_HALT			0	/* halt architecture option */
+#define XCHAL_HAVE_BOOTLOADER		0	/* boot loader (for TX) */
+#define XCHAL_HAVE_MEM_ECC_PARITY	0	/* local memory ECC/parity */
+#define XCHAL_HAVE_VECTOR_SELECT	1	/* relocatable vectors */
+#define XCHAL_HAVE_VECBASE		1	/* relocatable vectors */
+#define XCHAL_VECBASE_RESET_VADDR	0x60000000  /* VECBASE reset value */
+#define XCHAL_VECBASE_RESET_PADDR	0x60000000
+#define XCHAL_RESET_VECBASE_OVERLAP	0
+
+#define XCHAL_RESET_VECTOR0_VADDR	0x50000000
+#define XCHAL_RESET_VECTOR0_PADDR	0x50000000
+#define XCHAL_RESET_VECTOR1_VADDR	0x40000400
+#define XCHAL_RESET_VECTOR1_PADDR	0x40000400
+#define XCHAL_RESET_VECTOR_VADDR	0x50000000
+#define XCHAL_RESET_VECTOR_PADDR	0x50000000
+#define XCHAL_USER_VECOFS		0x00000340
+#define XCHAL_USER_VECTOR_VADDR		0x60000340
+#define XCHAL_USER_VECTOR_PADDR		0x60000340
+#define XCHAL_KERNEL_VECOFS		0x00000300
+#define XCHAL_KERNEL_VECTOR_VADDR	0x60000300
+#define XCHAL_KERNEL_VECTOR_PADDR	0x60000300
+#define XCHAL_DOUBLEEXC_VECOFS		0x000003C0
+#define XCHAL_DOUBLEEXC_VECTOR_VADDR	0x600003C0
+#define XCHAL_DOUBLEEXC_VECTOR_PADDR	0x600003C0
+#define XCHAL_WINDOW_OF4_VECOFS		0x00000000
+#define XCHAL_WINDOW_UF4_VECOFS		0x00000040
+#define XCHAL_WINDOW_OF8_VECOFS		0x00000080
+#define XCHAL_WINDOW_UF8_VECOFS		0x000000C0
+#define XCHAL_WINDOW_OF12_VECOFS	0x00000100
+#define XCHAL_WINDOW_UF12_VECOFS	0x00000140
+#define XCHAL_WINDOW_VECTORS_VADDR	0x60000000
+#define XCHAL_WINDOW_VECTORS_PADDR	0x60000000
+#define XCHAL_INTLEVEL2_VECOFS		0x00000180
+#define XCHAL_INTLEVEL2_VECTOR_VADDR	0x60000180
+#define XCHAL_INTLEVEL2_VECTOR_PADDR	0x60000180
+#define XCHAL_INTLEVEL3_VECOFS		0x000001C0
+#define XCHAL_INTLEVEL3_VECTOR_VADDR	0x600001C0
+#define XCHAL_INTLEVEL3_VECTOR_PADDR	0x600001C0
+#define XCHAL_INTLEVEL4_VECOFS		0x00000200
+#define XCHAL_INTLEVEL4_VECTOR_VADDR	0x60000200
+#define XCHAL_INTLEVEL4_VECTOR_PADDR	0x60000200
+#define XCHAL_INTLEVEL5_VECOFS		0x00000240
+#define XCHAL_INTLEVEL5_VECTOR_VADDR	0x60000240
+#define XCHAL_INTLEVEL5_VECTOR_PADDR	0x60000240
+#define XCHAL_INTLEVEL6_VECOFS		0x00000280
+#define XCHAL_INTLEVEL6_VECTOR_VADDR	0x60000280
+#define XCHAL_INTLEVEL6_VECTOR_PADDR	0x60000280
+#define XCHAL_DEBUG_VECOFS		XCHAL_INTLEVEL6_VECOFS
+#define XCHAL_DEBUG_VECTOR_VADDR	XCHAL_INTLEVEL6_VECTOR_VADDR
+#define XCHAL_DEBUG_VECTOR_PADDR	XCHAL_INTLEVEL6_VECTOR_PADDR
+#define XCHAL_NMI_VECOFS		0x000002C0
+#define XCHAL_NMI_VECTOR_VADDR		0x600002C0
+#define XCHAL_NMI_VECTOR_PADDR		0x600002C0
+#define XCHAL_INTLEVEL7_VECOFS		XCHAL_NMI_VECOFS
+#define XCHAL_INTLEVEL7_VECTOR_VADDR	XCHAL_NMI_VECTOR_VADDR
+#define XCHAL_INTLEVEL7_VECTOR_PADDR	XCHAL_NMI_VECTOR_PADDR
+
+
+/*----------------------------------------------------------------------
+				DEBUG MODULE
+  ----------------------------------------------------------------------*/
+
+/*  Misc  */
+#define XCHAL_HAVE_DEBUG_ERI		1	/* ERI to debug module */
+#define XCHAL_HAVE_DEBUG_APB		0	/* APB to debug module */
+#define XCHAL_HAVE_DEBUG_JTAG		1	/* JTAG to debug module */
+
+/*  On-Chip Debug (OCD)  */
+#define XCHAL_HAVE_OCD			1	/* OnChipDebug option */
+#define XCHAL_NUM_IBREAK		2	/* number of IBREAKn regs */
+#define XCHAL_NUM_DBREAK		2	/* number of DBREAKn regs */
+#define XCHAL_HAVE_OCD_DIR_ARRAY	0	/* faster OCD option (to LX4) */
+#define XCHAL_HAVE_OCD_LS32DDR		1	/* L32DDR/S32DDR (faster OCD) */
+
+/*  TRAX (in core)  */
+#define XCHAL_HAVE_TRAX			1	/* TRAX in debug module */
+#define XCHAL_TRAX_MEM_SIZE		262144	/* TRAX memory size in bytes */
+#define XCHAL_TRAX_MEM_SHAREABLE	0	/* start/end regs; ready sig. */
+#define XCHAL_TRAX_ATB_WIDTH		0	/* ATB width (bits), 0=no ATB */
+#define XCHAL_TRAX_TIME_WIDTH		0	/* timestamp bitwidth, 0=none */
+
+/*  Perf counters  */
+#define XCHAL_NUM_PERF_COUNTERS		0	/* performance counters */
+
+
+/*----------------------------------------------------------------------
+				MMU
+  ----------------------------------------------------------------------*/
+
+/*  See core-matmap.h header file for more details.  */
+
+#define XCHAL_HAVE_TLBS			1	/* inverse of HAVE_CACHEATTR */
+#define XCHAL_HAVE_SPANNING_WAY		1	/* one way maps I+D 4GB vaddr */
+#define XCHAL_SPANNING_WAY		0	/* TLB spanning way number */
+#define XCHAL_HAVE_IDENTITY_MAP		1	/* vaddr == paddr always */
+#define XCHAL_HAVE_CACHEATTR		0	/* CACHEATTR register present */
+#define XCHAL_HAVE_MIMIC_CACHEATTR	1	/* region protection */
+#define XCHAL_HAVE_XLT_CACHEATTR	0	/* region prot. w/translation */
+#define XCHAL_HAVE_PTP_MMU		0	/* full MMU (with page table
+						   [autorefill] and protection)
+						   usable for an MMU-based OS */
+/*  If none of the above last 4 are set, it's a custom TLB configuration.  */
+
+#define XCHAL_MMU_ASID_BITS		0	/* number of bits in ASIDs */
+#define XCHAL_MMU_RINGS			1	/* number of rings (1..4) */
+#define XCHAL_MMU_RING_BITS		0	/* num of bits in RING field */
+
+#endif /* !XTENSA_HAL_NON_PRIVILEGED_ONLY */
+
+
+#endif /* _XTENSA_CORE_CONFIGURATION_H */
+
diff --git a/arch/xtensa/variants/de212/include/variant/tie-asm.h b/arch/xtensa/variants/de212/include/variant/tie-asm.h
new file mode 100644
index 000000000..77755354f
--- /dev/null
+++ b/arch/xtensa/variants/de212/include/variant/tie-asm.h
@@ -0,0 +1,170 @@
+/* 
+ * tie-asm.h -- compile-time HAL assembler definitions dependent on CORE & TIE
+ *
+ *  NOTE:  This header file is not meant to be included directly.
+ */
+
+/* This header file contains assembly-language definitions (assembly
+   macros, etc.) for this specific Xtensa processor's TIE extensions
+   and options.  It is customized to this Xtensa processor configuration.
+
+   Copyright (c) 1999-2015 Cadence Design Systems Inc.
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be included
+   in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _XTENSA_CORE_TIE_ASM_H
+#define _XTENSA_CORE_TIE_ASM_H
+
+/*  Selection parameter values for save-area save/restore macros:  */
+/*  Option vs. TIE:  */
+#define XTHAL_SAS_TIE	0x0001	/* custom extension or coprocessor */
+#define XTHAL_SAS_OPT	0x0002	/* optional (and not a coprocessor) */
+#define XTHAL_SAS_ANYOT	0x0003	/* both of the above */
+/*  Whether used automatically by compiler:  */
+#define XTHAL_SAS_NOCC	0x0004	/* not used by compiler w/o special opts/code */
+#define XTHAL_SAS_CC	0x0008	/* used by compiler without special opts/code */
+#define XTHAL_SAS_ANYCC	0x000C	/* both of the above */
+/*  ABI handling across function calls:  */
+#define XTHAL_SAS_CALR	0x0010	/* caller-saved */
+#define XTHAL_SAS_CALE	0x0020	/* callee-saved */
+#define XTHAL_SAS_GLOB	0x0040	/* global across function calls (in thread) */
+#define XTHAL_SAS_ANYABI	0x0070	/* all of the above three */
+/*  Misc  */
+#define XTHAL_SAS_ALL	0xFFFF	/* include all default NCP contents */
+#define XTHAL_SAS3(optie,ccuse,abi)	( ((optie) & XTHAL_SAS_ANYOT)  \
+					| ((ccuse) & XTHAL_SAS_ANYCC)  \
+					| ((abi)   & XTHAL_SAS_ANYABI) )
+
+
+    /*
+      *  Macro to store all non-coprocessor (extra) custom TIE and optional state
+      *  (not including zero-overhead loop registers).
+      *  Required parameters:
+      *      ptr         Save area pointer address register (clobbered)
+      *                  (register must contain a 4 byte aligned address).
+      *      at1..at4    Four temporary address registers (first XCHAL_NCP_NUM_ATMPS
+      *                  registers are clobbered, the remaining are unused).
+      *  Optional parameters:
+      *      continue    If macro invoked as part of a larger store sequence, set to 1
+      *                  if this is not the first in the sequence.  Defaults to 0.
+      *      ofs         Offset from start of larger sequence (from value of first ptr
+      *                  in sequence) at which to store.  Defaults to next available space
+      *                  (or 0 if <continue> is 0).
+      *      select      Select what category(ies) of registers to store, as a bitmask
+      *                  (see XTHAL_SAS_xxx constants).  Defaults to all registers.
+      *      alloc       Select what category(ies) of registers to allocate; if any
+      *                  category is selected here that is not in <select>, space for
+      *                  the corresponding registers is skipped without doing any store.
+      */
+    .macro xchal_ncp_store  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
+	xchal_sa_start	\continue, \ofs
+	// Optional caller-saved registers used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	rsr.ACCLO	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+0
+	rsr.ACCHI	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.endif
+	// Optional caller-saved registers not used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1004, 4, 4
+	rsr.SCOMPARE1	\at1		// conditional store option
+	s32i	\at1, \ptr, .Lxchal_ofs_+0
+	rsr.M0	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+4
+	rsr.M1	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+8
+	rsr.M2	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+12
+	rsr.M3	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+16
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 20
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1004, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 20
+	.endif
+    .endm	// xchal_ncp_store
+
+    /*
+      *  Macro to load all non-coprocessor (extra) custom TIE and optional state
+      *  (not including zero-overhead loop registers).
+      *  Required parameters:
+      *      ptr         Save area pointer address register (clobbered)
+      *                  (register must contain a 4 byte aligned address).
+      *      at1..at4    Four temporary address registers (first XCHAL_NCP_NUM_ATMPS
+      *                  registers are clobbered, the remaining are unused).
+      *  Optional parameters:
+      *      continue    If macro invoked as part of a larger load sequence, set to 1
+      *                  if this is not the first in the sequence.  Defaults to 0.
+      *      ofs         Offset from start of larger sequence (from value of first ptr
+      *                  in sequence) at which to load.  Defaults to next available space
+      *                  (or 0 if <continue> is 0).
+      *      select      Select what category(ies) of registers to load, as a bitmask
+      *                  (see XTHAL_SAS_xxx constants).  Defaults to all registers.
+      *      alloc       Select what category(ies) of registers to allocate; if any
+      *                  category is selected here that is not in <select>, space for
+      *                  the corresponding registers is skipped without doing any load.
+      */
+    .macro xchal_ncp_load  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
+	xchal_sa_start	\continue, \ofs
+	// Optional caller-saved registers used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_+0
+	wsr.ACCLO	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+4
+	wsr.ACCHI	\at1		// MAC16 option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.endif
+	// Optional caller-saved registers not used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1004, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_+0
+	wsr.SCOMPARE1	\at1		// conditional store option
+	l32i	\at1, \ptr, .Lxchal_ofs_+4
+	wsr.M0	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+8
+	wsr.M1	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+12
+	wsr.M2	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+16
+	wsr.M3	\at1		// MAC16 option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 20
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1004, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 20
+	.endif
+    .endm	// xchal_ncp_load
+
+
+#define XCHAL_NCP_NUM_ATMPS	1
+
+#define XCHAL_SA_NUM_ATMPS	1
+
+#endif /*_XTENSA_CORE_TIE_ASM_H*/
+
diff --git a/arch/xtensa/variants/de212/include/variant/tie.h b/arch/xtensa/variants/de212/include/variant/tie.h
new file mode 100644
index 000000000..b8a061a3f
--- /dev/null
+++ b/arch/xtensa/variants/de212/include/variant/tie.h
@@ -0,0 +1,136 @@
+/* 
+ * tie.h -- compile-time HAL definitions dependent on CORE & TIE configuration
+ *
+ *  NOTE:  This header file is not meant to be included directly.
+ */
+
+/* This header file describes this specific Xtensa processor's TIE extensions
+   that extend basic Xtensa core functionality.  It is customized to this
+   Xtensa processor configuration.
+
+   Copyright (c) 1999-2015 Cadence Design Systems Inc.
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be included
+   in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _XTENSA_CORE_TIE_H
+#define _XTENSA_CORE_TIE_H
+
+#define XCHAL_CP_NUM			0	/* number of coprocessors */
+#define XCHAL_CP_MAX			0	/* max CP ID + 1 (0 if none) */
+#define XCHAL_CP_MASK			0x00	/* bitmask of all CPs by ID */
+#define XCHAL_CP_PORT_MASK		0x00	/* bitmask of only port CPs */
+
+/*  Save area for non-coprocessor optional and custom (TIE) state:  */
+#define XCHAL_NCP_SA_SIZE		28
+#define XCHAL_NCP_SA_ALIGN		4
+
+/*  Total save area for optional and custom state (NCP + CPn):  */
+#define XCHAL_TOTAL_SA_SIZE		32	/* with 16-byte align padding */
+#define XCHAL_TOTAL_SA_ALIGN		4	/* actual minimum alignment */
+
+/*
+ * Detailed contents of save areas.
+ * NOTE:  caller must define the XCHAL_SA_REG macro (not defined here)
+ * before expanding the XCHAL_xxx_SA_LIST() macros.
+ *
+ * XCHAL_SA_REG(s,ccused,abikind,kind,opt,name,galign,align,asize,
+ *		dbnum,base,regnum,bitsz,gapsz,reset,x...)
+ *
+ *	s = passed from XCHAL_*_LIST(s), eg. to select how to expand
+ *	ccused = set if used by compiler without special options or code
+ *	abikind = 0 (caller-saved), 1 (callee-saved), or 2 (thread-global)
+ *	kind = 0 (special reg), 1 (TIE user reg), or 2 (TIE regfile reg)
+ *	opt = 0 (custom TIE extension or coprocessor), or 1 (optional reg)
+ *	name = lowercase reg name (no quotes)
+ *	galign = group byte alignment (power of 2) (galign >= align)
+ *	align = register byte alignment (power of 2)
+ *	asize = allocated size in bytes (asize*8 == bitsz + gapsz + padsz)
+ *	  (not including any pad bytes required to galign this or next reg)
+ *	dbnum = unique target number f/debug (see <xtensa-libdb-macros.h>)
+ *	base = reg shortname w/o index (or sr=special, ur=TIE user reg)
+ *	regnum = reg index in regfile, or special/TIE-user reg number
+ *	bitsz = number of significant bits (regfile width, or ur/sr mask bits)
+ *	gapsz = intervening bits, if bitsz bits not stored contiguously
+ *	(padsz = pad bits at end [TIE regfile] or at msbits [ur,sr] of asize)
+ *	reset = register reset value (or 0 if undefined at reset)
+ *	x = reserved for future use (0 until then)
+ *
+ *  To filter out certain registers, e.g. to expand only the non-global
+ *  registers used by the compiler, you can do something like this:
+ *
+ *  #define XCHAL_SA_REG(s,ccused,p...)	SELCC##ccused(p)
+ *  #define SELCC0(p...)
+ *  #define SELCC1(abikind,p...)	SELAK##abikind(p)
+ *  #define SELAK0(p...)		REG(p)
+ *  #define SELAK1(p...)		REG(p)
+ *  #define SELAK2(p...)
+ *  #define REG(kind,tie,name,galn,aln,asz,csz,dbnum,base,rnum,bsz,rst,x...) \
+ *		...what you want to expand...
+ */
+
+#define XCHAL_NCP_SA_NUM	7
+#define XCHAL_NCP_SA_LIST(s)	\
+ XCHAL_SA_REG(s,1,0,0,1,          acclo, 4, 4, 4,0x0210,  sr,16 , 32,0,0,0) \
+ XCHAL_SA_REG(s,1,0,0,1,          acchi, 4, 4, 4,0x0211,  sr,17 ,  8,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,      scompare1, 4, 4, 4,0x020C,  sr,12 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m0, 4, 4, 4,0x0220,  sr,32 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m1, 4, 4, 4,0x0221,  sr,33 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m2, 4, 4, 4,0x0222,  sr,34 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m3, 4, 4, 4,0x0223,  sr,35 , 32,0,0,0)
+
+#define XCHAL_CP0_SA_NUM	0
+#define XCHAL_CP0_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP1_SA_NUM	0
+#define XCHAL_CP1_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP2_SA_NUM	0
+#define XCHAL_CP2_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP3_SA_NUM	0
+#define XCHAL_CP3_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP4_SA_NUM	0
+#define XCHAL_CP4_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP5_SA_NUM	0
+#define XCHAL_CP5_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP6_SA_NUM	0
+#define XCHAL_CP6_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP7_SA_NUM	0
+#define XCHAL_CP7_SA_LIST(s)	/* empty */
+
+/* Byte length of instruction from its first nibble (op0 field), per FLIX.  */
+#define XCHAL_OP0_FORMAT_LENGTHS	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3
+/* Byte length of instruction from its first byte, per FLIX.  */
+#define XCHAL_BYTE0_FORMAT_LENGTHS	\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3
+
+#endif /*_XTENSA_CORE_TIE_H*/
+
diff --git a/arch/xtensa/variants/fsf/include/variant/core.h b/arch/xtensa/variants/fsf/include/variant/core.h
new file mode 100644
index 000000000..2f337605c
--- /dev/null
+++ b/arch/xtensa/variants/fsf/include/variant/core.h
@@ -0,0 +1,359 @@
+/*
+ * Xtensa processor core configuration information.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1999-2006 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_CORE_H
+#define _XTENSA_CORE_H
+
+
+/****************************************************************************
+	    Parameters Useful for Any Code, USER or PRIVILEGED
+ ****************************************************************************/
+
+/*
+ *  Note:  Macros of the form XCHAL_HAVE_*** have a value of 1 if the option is
+ *  configured, and a value of 0 otherwise.  These macros are always defined.
+ */
+
+
+/*----------------------------------------------------------------------
+				ISA
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_BE			1	/* big-endian byte ordering */
+#define XCHAL_HAVE_WINDOWED		1	/* windowed registers option */
+#define XCHAL_NUM_AREGS			64	/* num of physical addr regs */
+#define XCHAL_NUM_AREGS_LOG2		6	/* log2(XCHAL_NUM_AREGS) */
+#define XCHAL_MAX_INSTRUCTION_SIZE	3	/* max instr bytes (3..8) */
+#define XCHAL_HAVE_DEBUG		1	/* debug option */
+#define XCHAL_HAVE_DENSITY		1	/* 16-bit instructions */
+#define XCHAL_HAVE_LOOPS		1	/* zero-overhead loops */
+#define XCHAL_HAVE_NSA			1	/* NSA/NSAU instructions */
+#define XCHAL_HAVE_MINMAX		0	/* MIN/MAX instructions */
+#define XCHAL_HAVE_SEXT			0	/* SEXT instruction */
+#define XCHAL_HAVE_CLAMPS		0	/* CLAMPS instruction */
+#define XCHAL_HAVE_MUL16		0	/* MUL16S/MUL16U instructions */
+#define XCHAL_HAVE_MUL32		0	/* MULL instruction */
+#define XCHAL_HAVE_MUL32_HIGH		0	/* MULUH/MULSH instructions */
+#define XCHAL_HAVE_L32R			1	/* L32R instruction */
+#define XCHAL_HAVE_ABSOLUTE_LITERALS	1	/* non-PC-rel (extended) L32R */
+#define XCHAL_HAVE_CONST16		0	/* CONST16 instruction */
+#define XCHAL_HAVE_ADDX			1	/* ADDX#/SUBX# instructions */
+#define XCHAL_HAVE_WIDE_BRANCHES	0	/* B*.W18 or B*.W15 instr's */
+#define XCHAL_HAVE_PREDICTED_BRANCHES	0	/* B[EQ/EQZ/NE/NEZ]T instr's */
+#define XCHAL_HAVE_CALL4AND12		1	/* (obsolete option) */
+#define XCHAL_HAVE_ABS			1	/* ABS instruction */
+/*#define XCHAL_HAVE_POPC		0*/	/* POPC instruction */
+/*#define XCHAL_HAVE_CRC		0*/	/* CRC instruction */
+#define XCHAL_HAVE_RELEASE_SYNC		0	/* L32AI/S32RI instructions */
+#define XCHAL_HAVE_S32C1I		0	/* S32C1I instruction */
+#define XCHAL_HAVE_SPECULATION		0	/* speculation */
+#define XCHAL_HAVE_FULL_RESET		1	/* all regs/state reset */
+#define XCHAL_NUM_CONTEXTS		1	/* */
+#define XCHAL_NUM_MISC_REGS		2	/* num of scratch regs (0..4) */
+#define XCHAL_HAVE_TAP_MASTER		0	/* JTAG TAP control instr's */
+#define XCHAL_HAVE_PRID			1	/* processor ID register */
+#define XCHAL_HAVE_THREADPTR		1	/* THREADPTR register */
+#define XCHAL_HAVE_BOOLEANS		0	/* boolean registers */
+#define XCHAL_HAVE_CP			0	/* CPENABLE reg (coprocessor) */
+#define XCHAL_CP_MAXCFG			0	/* max allowed cp id plus one */
+#define XCHAL_HAVE_MAC16		0	/* MAC16 package */
+#define XCHAL_HAVE_VECTORFPU2005	0	/* vector floating-point pkg */
+#define XCHAL_HAVE_FP			0	/* floating point pkg */
+#define XCHAL_HAVE_VECTRA1		0	/* Vectra I  pkg */
+#define XCHAL_HAVE_VECTRALX		0	/* Vectra LX pkg */
+#define XCHAL_HAVE_HIFI2		0	/* HiFi2 Audio Engine pkg */
+
+
+/*----------------------------------------------------------------------
+				MISC
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_WRITEBUFFER_ENTRIES	4	/* size of write buffer */
+#define XCHAL_INST_FETCH_WIDTH		4	/* instr-fetch width in bytes */
+#define XCHAL_DATA_WIDTH		4	/* data width in bytes */
+/*  In T1050, applies to selected core load and store instructions (see ISA): */
+#define XCHAL_UNALIGNED_LOAD_EXCEPTION	1	/* unaligned loads cause exc. */
+#define XCHAL_UNALIGNED_STORE_EXCEPTION	1	/* unaligned stores cause exc.*/
+
+#define XCHAL_CORE_ID			"fsf"	/* alphanum core name
+						   (CoreID) set in the Xtensa
+						   Processor Generator */
+
+#define XCHAL_BUILD_UNIQUE_ID		0x00006700	/* 22-bit sw build ID */
+
+/*
+ *  These definitions describe the hardware targeted by this software.
+ */
+#define XCHAL_HW_CONFIGID0		0xC103C3FF	/* ConfigID hi 32 bits*/
+#define XCHAL_HW_CONFIGID1		0x0C006700	/* ConfigID lo 32 bits*/
+#define XCHAL_HW_VERSION_NAME		"LX2.0.0"	/* full version name */
+#define XCHAL_HW_VERSION_MAJOR		2200	/* major ver# of targeted hw */
+#define XCHAL_HW_VERSION_MINOR		0	/* minor ver# of targeted hw */
+#define XTHAL_HW_REL_LX2		1
+#define XTHAL_HW_REL_LX2_0		1
+#define XTHAL_HW_REL_LX2_0_0		1
+#define XCHAL_HW_CONFIGID_RELIABLE	1
+/*  If software targets a *range* of hardware versions, these are the bounds: */
+#define XCHAL_HW_MIN_VERSION_MAJOR	2200	/* major v of earliest tgt hw */
+#define XCHAL_HW_MIN_VERSION_MINOR	0	/* minor v of earliest tgt hw */
+#define XCHAL_HW_MAX_VERSION_MAJOR	2200	/* major v of latest tgt hw */
+#define XCHAL_HW_MAX_VERSION_MINOR	0	/* minor v of latest tgt hw */
+
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_ICACHE_LINESIZE		16	/* I-cache line size in bytes */
+#define XCHAL_DCACHE_LINESIZE		16	/* D-cache line size in bytes */
+#define XCHAL_ICACHE_LINEWIDTH		4	/* log2(I line size in bytes) */
+#define XCHAL_DCACHE_LINEWIDTH		4	/* log2(D line size in bytes) */
+
+#define XCHAL_ICACHE_SIZE		8192	/* I-cache size in bytes or 0 */
+#define XCHAL_DCACHE_SIZE		8192	/* D-cache size in bytes or 0 */
+
+#define XCHAL_DCACHE_IS_WRITEBACK	0	/* writeback feature */
+
+
+
+
+/****************************************************************************
+    Parameters Useful for PRIVILEGED (Supervisory or Non-Virtualized) Code
+ ****************************************************************************/
+
+
+#ifndef XTENSA_HAL_NON_PRIVILEGED_ONLY
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_PIF			1	/* any outbound PIF present */
+
+/*  If present, cache size in bytes == (ways * 2^(linewidth + setwidth)).  */
+
+/*  Number of cache sets in log2(lines per way):  */
+#define XCHAL_ICACHE_SETWIDTH		8
+#define XCHAL_DCACHE_SETWIDTH		8
+
+/*  Cache set associativity (number of ways):  */
+#define XCHAL_ICACHE_WAYS		2
+#define XCHAL_DCACHE_WAYS		2
+
+/*  Cache features:  */
+#define XCHAL_ICACHE_LINE_LOCKABLE	0
+#define XCHAL_DCACHE_LINE_LOCKABLE	0
+#define XCHAL_ICACHE_ECC_PARITY		0
+#define XCHAL_DCACHE_ECC_PARITY		0
+
+/*  Number of encoded cache attr bits (see <xtensa/hal.h> for decoded bits):  */
+#define XCHAL_CA_BITS			4
+
+
+/*----------------------------------------------------------------------
+			INTERNAL I/D RAM/ROMs and XLMI
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_INSTROM		0	/* number of core instr. ROMs */
+#define XCHAL_NUM_INSTRAM		0	/* number of core instr. RAMs */
+#define XCHAL_NUM_DATAROM		0	/* number of core data ROMs */
+#define XCHAL_NUM_DATARAM		0	/* number of core data RAMs */
+#define XCHAL_NUM_URAM			0	/* number of core unified RAMs*/
+#define XCHAL_NUM_XLMI			0	/* number of core XLMI ports */
+
+
+/*----------------------------------------------------------------------
+			INTERRUPTS and TIMERS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_INTERRUPTS		1	/* interrupt option */
+#define XCHAL_HAVE_HIGHPRI_INTERRUPTS	1	/* med/high-pri. interrupts */
+#define XCHAL_HAVE_NMI			0	/* non-maskable interrupt */
+#define XCHAL_HAVE_CCOUNT		1	/* CCOUNT reg. (timer option) */
+#define XCHAL_NUM_TIMERS		3	/* number of CCOMPAREn regs */
+#define XCHAL_NUM_INTERRUPTS		17	/* number of interrupts */
+#define XCHAL_NUM_INTERRUPTS_LOG2	5	/* ceil(log2(NUM_INTERRUPTS)) */
+#define XCHAL_NUM_EXTINTERRUPTS		10	/* num of external interrupts */
+#define XCHAL_NUM_INTLEVELS		4	/* number of interrupt levels
+						   (not including level zero) */
+#define XCHAL_EXCM_LEVEL		1	/* level masked by PS.EXCM */
+	/* (always 1 in XEA1; levels 2 .. EXCM_LEVEL are "medium priority") */
+
+/*  Masks of interrupts at each interrupt level:  */
+#define XCHAL_INTLEVEL1_MASK		0x000064F9
+#define XCHAL_INTLEVEL2_MASK		0x00008902
+#define XCHAL_INTLEVEL3_MASK		0x00011204
+#define XCHAL_INTLEVEL4_MASK		0x00000000
+#define XCHAL_INTLEVEL5_MASK		0x00000000
+#define XCHAL_INTLEVEL6_MASK		0x00000000
+#define XCHAL_INTLEVEL7_MASK		0x00000000
+
+/*  Masks of interrupts at each range 1..n of interrupt levels:  */
+#define XCHAL_INTLEVEL1_ANDBELOW_MASK	0x000064F9
+#define XCHAL_INTLEVEL2_ANDBELOW_MASK	0x0000EDFB
+#define XCHAL_INTLEVEL3_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_INTLEVEL4_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_INTLEVEL5_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_INTLEVEL6_ANDBELOW_MASK	0x0001FFFF
+#define XCHAL_INTLEVEL7_ANDBELOW_MASK	0x0001FFFF
+
+/*  Level of each interrupt:  */
+#define XCHAL_INT0_LEVEL		1
+#define XCHAL_INT1_LEVEL		2
+#define XCHAL_INT2_LEVEL		3
+#define XCHAL_INT3_LEVEL		1
+#define XCHAL_INT4_LEVEL		1
+#define XCHAL_INT5_LEVEL		1
+#define XCHAL_INT6_LEVEL		1
+#define XCHAL_INT7_LEVEL		1
+#define XCHAL_INT8_LEVEL		2
+#define XCHAL_INT9_LEVEL		3
+#define XCHAL_INT10_LEVEL		1
+#define XCHAL_INT11_LEVEL		2
+#define XCHAL_INT12_LEVEL		3
+#define XCHAL_INT13_LEVEL		1
+#define XCHAL_INT14_LEVEL		1
+#define XCHAL_INT15_LEVEL		2
+#define XCHAL_INT16_LEVEL		3
+#define XCHAL_DEBUGLEVEL		4	/* debug interrupt level */
+#define XCHAL_HAVE_DEBUG_EXTERN_INT	0	/* OCD external db interrupt */
+
+/*  Type of each interrupt:  */
+#define XCHAL_INT0_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT1_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT2_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT3_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT4_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT5_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT6_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT7_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT8_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT9_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT10_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT11_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT12_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT13_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT14_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT15_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT16_TYPE 	XTHAL_INTTYPE_SOFTWARE
+
+/*  Masks of interrupts for each type of interrupt:  */
+#define XCHAL_INTTYPE_MASK_UNCONFIGURED	0xFFFE0000
+#define XCHAL_INTTYPE_MASK_SOFTWARE	0x0001E000
+#define XCHAL_INTTYPE_MASK_EXTERN_EDGE	0x00000380
+#define XCHAL_INTTYPE_MASK_EXTERN_LEVEL	0x0000007F
+#define XCHAL_INTTYPE_MASK_TIMER	0x00001C00
+#define XCHAL_INTTYPE_MASK_NMI		0x00000000
+#define XCHAL_INTTYPE_MASK_WRITE_ERROR	0x00000000
+
+/*  Interrupt numbers assigned to specific interrupt sources:  */
+#define XCHAL_TIMER0_INTERRUPT		10	/* CCOMPARE0 */
+#define XCHAL_TIMER1_INTERRUPT		11	/* CCOMPARE1 */
+#define XCHAL_TIMER2_INTERRUPT		12	/* CCOMPARE2 */
+#define XCHAL_TIMER3_INTERRUPT		XTHAL_TIMER_UNCONFIGURED
+
+/*  Interrupt numbers for levels at which only one interrupt is configured:  */
+/*  (There are many interrupts each at level(s) 1, 2, 3.)  */
+
+
+/*
+ *  External interrupt vectors/levels.
+ *  These macros describe how Xtensa processor interrupt numbers
+ *  (as numbered internally, eg. in INTERRUPT and INTENABLE registers)
+ *  map to external BInterrupt<n> pins, for those interrupts
+ *  configured as external (level-triggered, edge-triggered, or NMI).
+ *  See the Xtensa processor databook for more details.
+ */
+
+/*  Core interrupt numbers mapped to each EXTERNAL interrupt number:  */
+#define XCHAL_EXTINT0_NUM		0	/* (intlevel 1) */
+#define XCHAL_EXTINT1_NUM		1	/* (intlevel 2) */
+#define XCHAL_EXTINT2_NUM		2	/* (intlevel 3) */
+#define XCHAL_EXTINT3_NUM		3	/* (intlevel 1) */
+#define XCHAL_EXTINT4_NUM		4	/* (intlevel 1) */
+#define XCHAL_EXTINT5_NUM		5	/* (intlevel 1) */
+#define XCHAL_EXTINT6_NUM		6	/* (intlevel 1) */
+#define XCHAL_EXTINT7_NUM		7	/* (intlevel 1) */
+#define XCHAL_EXTINT8_NUM		8	/* (intlevel 2) */
+#define XCHAL_EXTINT9_NUM		9	/* (intlevel 3) */
+
+
+/*----------------------------------------------------------------------
+			EXCEPTIONS and VECTORS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_XEA_VERSION		2	/* Xtensa Exception Architecture
+						   number: 1 == XEA1 (old)
+							   2 == XEA2 (new)
+							   0 == XEAX (extern) */
+#define XCHAL_HAVE_XEA1			0	/* Exception Architecture 1 */
+#define XCHAL_HAVE_XEA2			1	/* Exception Architecture 2 */
+#define XCHAL_HAVE_XEAX			0	/* External Exception Arch. */
+#define XCHAL_HAVE_EXCEPTIONS		1	/* exception option */
+#define XCHAL_HAVE_MEM_ECC_PARITY	0	/* local memory ECC/parity */
+
+#define XCHAL_RESET_VECTOR_VADDR	0xFE000020
+#define XCHAL_RESET_VECTOR_PADDR	0xFE000020
+#define XCHAL_USER_VECTOR_VADDR		0xD0000220
+#define XCHAL_USER_VECTOR_PADDR		0x00000220
+#define XCHAL_KERNEL_VECTOR_VADDR	0xD0000200
+#define XCHAL_KERNEL_VECTOR_PADDR	0x00000200
+#define XCHAL_DOUBLEEXC_VECTOR_VADDR	0xD0000290
+#define XCHAL_DOUBLEEXC_VECTOR_PADDR	0x00000290
+#define XCHAL_WINDOW_VECTORS_VADDR	0xD0000000
+#define XCHAL_WINDOW_VECTORS_PADDR	0x00000000
+#define XCHAL_INTLEVEL2_VECTOR_VADDR	0xD0000240
+#define XCHAL_INTLEVEL2_VECTOR_PADDR	0x00000240
+#define XCHAL_INTLEVEL3_VECTOR_VADDR	0xD0000250
+#define XCHAL_INTLEVEL3_VECTOR_PADDR	0x00000250
+#define XCHAL_INTLEVEL4_VECTOR_VADDR	0xFE000520
+#define XCHAL_INTLEVEL4_VECTOR_PADDR	0xFE000520
+#define XCHAL_DEBUG_VECTOR_VADDR	XCHAL_INTLEVEL4_VECTOR_VADDR
+#define XCHAL_DEBUG_VECTOR_PADDR	XCHAL_INTLEVEL4_VECTOR_PADDR
+
+
+/*----------------------------------------------------------------------
+				DEBUG
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_OCD			1	/* OnChipDebug option */
+#define XCHAL_NUM_IBREAK		2	/* number of IBREAKn regs */
+#define XCHAL_NUM_DBREAK		2	/* number of DBREAKn regs */
+#define XCHAL_HAVE_OCD_DIR_ARRAY	1	/* faster OCD option */
+
+
+/*----------------------------------------------------------------------
+				MMU
+  ----------------------------------------------------------------------*/
+
+/*  See <xtensa/config/core-matmap.h> header file for more details.  */
+
+#define XCHAL_HAVE_TLBS			1	/* inverse of HAVE_CACHEATTR */
+#define XCHAL_HAVE_SPANNING_WAY		0	/* one way maps I+D 4GB vaddr */
+#define XCHAL_HAVE_IDENTITY_MAP		0	/* vaddr == paddr always */
+#define XCHAL_HAVE_CACHEATTR		0	/* CACHEATTR register present */
+#define XCHAL_HAVE_MIMIC_CACHEATTR	0	/* region protection */
+#define XCHAL_HAVE_XLT_CACHEATTR	0	/* region prot. w/translation */
+#define XCHAL_HAVE_PTP_MMU		1	/* full MMU (with page table
+						   [autorefill] and protection)
+						   usable for an MMU-based OS */
+/*  If none of the above last 4 are set, it's a custom TLB configuration.  */
+#define XCHAL_ITLB_ARF_ENTRIES_LOG2	2	/* log2(autorefill way size) */
+#define XCHAL_DTLB_ARF_ENTRIES_LOG2	2	/* log2(autorefill way size) */
+
+#define XCHAL_MMU_ASID_BITS		8	/* number of bits in ASIDs */
+#define XCHAL_MMU_RINGS			4	/* number of rings (1..4) */
+#define XCHAL_MMU_RING_BITS		2	/* num of bits in RING field */
+
+#endif /* !XTENSA_HAL_NON_PRIVILEGED_ONLY */
+
+
+#endif /* _XTENSA_CORE_CONFIGURATION_H */
+
diff --git a/arch/xtensa/variants/fsf/include/variant/tie-asm.h b/arch/xtensa/variants/fsf/include/variant/tie-asm.h
new file mode 100644
index 000000000..68a73bf4f
--- /dev/null
+++ b/arch/xtensa/variants/fsf/include/variant/tie-asm.h
@@ -0,0 +1,70 @@
+/*
+ * This header file contains assembly-language definitions (assembly
+ * macros, etc.) for this specific Xtensa processor's TIE extensions
+ * and options.  It is customized to this Xtensa processor configuration.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1999-2008 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_CORE_TIE_ASM_H
+#define _XTENSA_CORE_TIE_ASM_H
+
+/*  Selection parameter values for save-area save/restore macros:  */
+/*  Option vs. TIE:  */
+#define XTHAL_SAS_TIE	0x0001	/* custom extension or coprocessor */
+#define XTHAL_SAS_OPT	0x0002	/* optional (and not a coprocessor) */
+/*  Whether used automatically by compiler:  */
+#define XTHAL_SAS_NOCC	0x0004	/* not used by compiler w/o special opts/code */
+#define XTHAL_SAS_CC	0x0008	/* used by compiler without special opts/code */
+/*  ABI handling across function calls:  */
+#define XTHAL_SAS_CALR	0x0010	/* caller-saved */
+#define XTHAL_SAS_CALE	0x0020	/* callee-saved */
+#define XTHAL_SAS_GLOB	0x0040	/* global across function calls (in thread) */
+/*  Misc  */
+#define XTHAL_SAS_ALL	0xFFFF	/* include all default NCP contents */
+
+
+
+/* Macro to save all non-coprocessor (extra) custom TIE and optional state
+ * (not including zero-overhead loop registers).
+ * Save area ptr (clobbered):  ptr  (1 byte aligned)
+ * Scratch regs  (clobbered):  at1..at4  (only first XCHAL_NCP_NUM_ATMPS needed)
+ */
+	.macro xchal_ncp_store  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL
+	xchal_sa_start	\continue, \ofs
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~\select
+	xchal_sa_align	\ptr, 0, 1024-4, 4, 4
+	rur	\at1, THREADPTR		// threadptr option
+	s32i	\at1, \ptr, .Lxchal_ofs_ + 0
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	.endm	// xchal_ncp_store
+
+/* Macro to save all non-coprocessor (extra) custom TIE and optional state
+ * (not including zero-overhead loop registers).
+ * Save area ptr (clobbered):  ptr  (1 byte aligned)
+ * Scratch regs  (clobbered):  at1..at4  (only first XCHAL_NCP_NUM_ATMPS needed)
+ */
+	.macro xchal_ncp_load  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL
+	xchal_sa_start	\continue, \ofs
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~\select
+	xchal_sa_align	\ptr, 0, 1024-4, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_ + 0
+	wur	\at1, THREADPTR		// threadptr option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	.endm	// xchal_ncp_load
+
+
+
+#define XCHAL_NCP_NUM_ATMPS	1
+
+
+#define XCHAL_SA_NUM_ATMPS	1
+
+#endif /*_XTENSA_CORE_TIE_ASM_H*/
+
diff --git a/arch/xtensa/variants/fsf/include/variant/tie.h b/arch/xtensa/variants/fsf/include/variant/tie.h
new file mode 100644
index 000000000..244cdea4d
--- /dev/null
+++ b/arch/xtensa/variants/fsf/include/variant/tie.h
@@ -0,0 +1,72 @@
+/*
+ * This header file describes this specific Xtensa processor's TIE extensions
+ * that extend basic Xtensa core functionality.  It is customized to this
+ * Xtensa processor configuration.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1999-2007 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_CORE_TIE_H
+#define _XTENSA_CORE_TIE_H
+
+#define XCHAL_CP_NUM			0	/* number of coprocessors */
+#define XCHAL_CP_MAX			0	/* max CP ID + 1 (0 if none) */
+#define XCHAL_CP_MASK			0x00	/* bitmask of all CPs by ID */
+#define XCHAL_CP_PORT_MASK		0x00	/* bitmask of only port CPs */
+
+/*  Filler info for unassigned coprocessors, to simplify arrays etc:  */
+#define XCHAL_NCP_SA_SIZE		0
+#define XCHAL_NCP_SA_ALIGN		1
+#define XCHAL_CP0_SA_SIZE		0
+#define XCHAL_CP0_SA_ALIGN		1
+#define XCHAL_CP1_SA_SIZE		0
+#define XCHAL_CP1_SA_ALIGN		1
+#define XCHAL_CP2_SA_SIZE		0
+#define XCHAL_CP2_SA_ALIGN		1
+#define XCHAL_CP3_SA_SIZE		0
+#define XCHAL_CP3_SA_ALIGN		1
+#define XCHAL_CP4_SA_SIZE		0
+#define XCHAL_CP4_SA_ALIGN		1
+#define XCHAL_CP5_SA_SIZE		0
+#define XCHAL_CP5_SA_ALIGN		1
+#define XCHAL_CP6_SA_SIZE		0
+#define XCHAL_CP6_SA_ALIGN		1
+#define XCHAL_CP7_SA_SIZE		0
+#define XCHAL_CP7_SA_ALIGN		1
+
+/*  Save area for non-coprocessor optional and custom (TIE) state:  */
+#define XCHAL_NCP_SA_SIZE		0
+#define XCHAL_NCP_SA_ALIGN		1
+
+/*  Total save area for optional and custom state (NCP + CPn):  */
+#define XCHAL_TOTAL_SA_SIZE		0	/* with 16-byte align padding */
+#define XCHAL_TOTAL_SA_ALIGN		1	/* actual minimum alignment */
+
+#define XCHAL_NCP_SA_NUM	0
+#define XCHAL_NCP_SA_LIST(s)
+#define XCHAL_CP0_SA_NUM	0
+#define XCHAL_CP0_SA_LIST(s)
+#define XCHAL_CP1_SA_NUM	0
+#define XCHAL_CP1_SA_LIST(s)
+#define XCHAL_CP2_SA_NUM	0
+#define XCHAL_CP2_SA_LIST(s)
+#define XCHAL_CP3_SA_NUM	0
+#define XCHAL_CP3_SA_LIST(s)
+#define XCHAL_CP4_SA_NUM	0
+#define XCHAL_CP4_SA_LIST(s)
+#define XCHAL_CP5_SA_NUM	0
+#define XCHAL_CP5_SA_LIST(s)
+#define XCHAL_CP6_SA_NUM	0
+#define XCHAL_CP6_SA_LIST(s)
+#define XCHAL_CP7_SA_NUM	0
+#define XCHAL_CP7_SA_LIST(s)
+
+/* Byte length of instruction from its first nibble (op0 field), per FLIX.  */
+#define XCHAL_OP0_FORMAT_LENGTHS	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3
+
+#endif /*_XTENSA_CORE_TIE_H*/
+
diff --git a/arch/xtensa/variants/test_kc705_be/include/variant/core.h b/arch/xtensa/variants/test_kc705_be/include/variant/core.h
new file mode 100644
index 000000000..a4ebdf719
--- /dev/null
+++ b/arch/xtensa/variants/test_kc705_be/include/variant/core.h
@@ -0,0 +1,575 @@
+/* 
+ * xtensa/config/core-isa.h -- HAL definitions that are dependent on Xtensa
+ *				processor CORE configuration
+ *
+ *  See <xtensa/config/core.h>, which includes this file, for more details.
+ */
+
+/* Xtensa processor core configuration information.
+
+   Copyright (c) 1999-2015 Tensilica Inc.
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be included
+   in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _XTENSA_CORE_CONFIGURATION_H
+#define _XTENSA_CORE_CONFIGURATION_H
+
+
+/****************************************************************************
+	    Parameters Useful for Any Code, USER or PRIVILEGED
+ ****************************************************************************/
+
+/*
+ *  Note:  Macros of the form XCHAL_HAVE_*** have a value of 1 if the option is
+ *  configured, and a value of 0 otherwise.  These macros are always defined.
+ */
+
+
+/*----------------------------------------------------------------------
+				ISA
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_BE			1	/* big-endian byte ordering */
+#define XCHAL_HAVE_WINDOWED		1	/* windowed registers option */
+#define XCHAL_NUM_AREGS			32	/* num of physical addr regs */
+#define XCHAL_NUM_AREGS_LOG2		5	/* log2(XCHAL_NUM_AREGS) */
+#define XCHAL_MAX_INSTRUCTION_SIZE	8	/* max instr bytes (3..8) */
+#define XCHAL_HAVE_DEBUG		1	/* debug option */
+#define XCHAL_HAVE_DENSITY		1	/* 16-bit instructions */
+#define XCHAL_HAVE_LOOPS		1	/* zero-overhead loops */
+#define XCHAL_LOOP_BUFFER_SIZE		0	/* zero-ov. loop instr buffer size */
+#define XCHAL_HAVE_NSA			1	/* NSA/NSAU instructions */
+#define XCHAL_HAVE_MINMAX		1	/* MIN/MAX instructions */
+#define XCHAL_HAVE_SEXT			1	/* SEXT instruction */
+#define XCHAL_HAVE_DEPBITS		0	/* DEPBITS instruction */
+#define XCHAL_HAVE_CLAMPS		1	/* CLAMPS instruction */
+#define XCHAL_HAVE_MUL16		1	/* MUL16S/MUL16U instructions */
+#define XCHAL_HAVE_MUL32		1	/* MULL instruction */
+#define XCHAL_HAVE_MUL32_HIGH		1	/* MULUH/MULSH instructions */
+#define XCHAL_HAVE_DIV32		1	/* QUOS/QUOU/REMS/REMU instructions */
+#define XCHAL_HAVE_L32R			1	/* L32R instruction */
+#define XCHAL_HAVE_ABSOLUTE_LITERALS	0	/* non-PC-rel (extended) L32R */
+#define XCHAL_HAVE_CONST16		0	/* CONST16 instruction */
+#define XCHAL_HAVE_ADDX			1	/* ADDX#/SUBX# instructions */
+#define XCHAL_HAVE_WIDE_BRANCHES	0	/* B*.W18 or B*.W15 instr's */
+#define XCHAL_HAVE_PREDICTED_BRANCHES	0	/* B[EQ/EQZ/NE/NEZ]T instr's */
+#define XCHAL_HAVE_CALL4AND12		1	/* (obsolete option) */
+#define XCHAL_HAVE_ABS			1	/* ABS instruction */
+/*#define XCHAL_HAVE_POPC		0*/	/* POPC instruction */
+/*#define XCHAL_HAVE_CRC		0*/	/* CRC instruction */
+#define XCHAL_HAVE_RELEASE_SYNC		1	/* L32AI/S32RI instructions */
+#define XCHAL_HAVE_S32C1I		1	/* S32C1I instruction */
+#define XCHAL_HAVE_SPECULATION		0	/* speculation */
+#define XCHAL_HAVE_FULL_RESET		1	/* all regs/state reset */
+#define XCHAL_NUM_CONTEXTS		1	/* */
+#define XCHAL_NUM_MISC_REGS		2	/* num of scratch regs (0..4) */
+#define XCHAL_HAVE_TAP_MASTER		0	/* JTAG TAP control instr's */
+#define XCHAL_HAVE_PRID			1	/* processor ID register */
+#define XCHAL_HAVE_EXTERN_REGS		1	/* WER/RER instructions */
+#define XCHAL_HAVE_MX			0	/* MX core (Tensilica internal) */
+#define XCHAL_HAVE_MP_INTERRUPTS	0	/* interrupt distributor port */
+#define XCHAL_HAVE_MP_RUNSTALL		0	/* core RunStall control port */
+#define XCHAL_HAVE_PSO			0	/* Power Shut-Off */
+#define XCHAL_HAVE_PSO_CDM		0	/* core/debug/mem pwr domains */
+#define XCHAL_HAVE_PSO_FULL_RETENTION	0	/* all regs preserved on PSO */
+#define XCHAL_HAVE_THREADPTR		1	/* THREADPTR register */
+#define XCHAL_HAVE_BOOLEANS		1	/* boolean registers */
+#define XCHAL_HAVE_CP			1	/* CPENABLE reg (coprocessor) */
+#define XCHAL_CP_MAXCFG			8	/* max allowed cp id plus one */
+#define XCHAL_HAVE_MAC16		1	/* MAC16 package */
+
+#define XCHAL_HAVE_FUSION		 0	/* Fusion*/
+#define XCHAL_HAVE_FUSION_FP	 0	        /* Fusion FP option */
+#define XCHAL_HAVE_FUSION_LOW_POWER 0	/* Fusion Low Power option */
+#define XCHAL_HAVE_FUSION_AES	 0	        /* Fusion BLE/Wifi AES-128 CCM option */
+#define XCHAL_HAVE_FUSION_CONVENC	 0       /* Fusion Conv Encode option */
+#define XCHAL_HAVE_FUSION_LFSR_CRC	 0	/* Fusion LFSR-CRC option */
+#define XCHAL_HAVE_FUSION_BITOPS	 0	/* Fusion Bit Operations Support option */
+#define XCHAL_HAVE_FUSION_AVS	 0	/* Fusion AVS option */
+#define XCHAL_HAVE_FUSION_16BIT_BASEBAND	 0	/* Fusion 16-bit Baseband option */
+#define XCHAL_HAVE_HIFIPRO		0	/* HiFiPro Audio Engine pkg */
+#define XCHAL_HAVE_HIFI4		0	/* HiFi4 Audio Engine pkg */
+#define XCHAL_HAVE_HIFI4_VFPU		0	/* HiFi4 Audio Engine VFPU option */
+#define XCHAL_HAVE_HIFI3		0	/* HiFi3 Audio Engine pkg */
+#define XCHAL_HAVE_HIFI3_VFPU		0	/* HiFi3 Audio Engine VFPU option */
+#define XCHAL_HAVE_HIFI2		1	/* HiFi2 Audio Engine pkg */
+#define XCHAL_HAVE_HIFI2_MUL32X24	1	/* HiFi2 and 32x24 MACs */
+#define XCHAL_HAVE_HIFI2EP		1	/* HiFi2EP */
+#define XCHAL_HAVE_HIFI_MINI		0	
+
+
+#define XCHAL_HAVE_VECTORFPU2005	0	/* vector or user floating-point pkg */
+#define XCHAL_HAVE_USER_DPFPU         0       /* user DP floating-point pkg */
+#define XCHAL_HAVE_USER_SPFPU         0       /* user DP floating-point pkg */
+#define XCHAL_HAVE_FP                 0      /* single prec floating point */
+#define XCHAL_HAVE_FP_DIV             0  /* FP with DIV instructions */
+#define XCHAL_HAVE_FP_RECIP           0        /* FP with RECIP instructions */
+#define XCHAL_HAVE_FP_SQRT            0 /* FP with SQRT instructions */
+#define XCHAL_HAVE_FP_RSQRT           0        /* FP with RSQRT instructions */
+#define XCHAL_HAVE_DFP                        0     /* double precision FP pkg */
+#define XCHAL_HAVE_DFP_DIV            0 /* DFP with DIV instructions */
+#define XCHAL_HAVE_DFP_RECIP          0       /* DFP with RECIP instructions*/
+#define XCHAL_HAVE_DFP_SQRT           0        /* DFP with SQRT instructions */
+#define XCHAL_HAVE_DFP_RSQRT          0       /* DFP with RSQRT instructions*/
+#define XCHAL_HAVE_DFP_ACCEL		0	/* double precision FP acceleration pkg */
+#define XCHAL_HAVE_DFP_accel		XCHAL_HAVE_DFP_ACCEL				/* for backward compatibility */
+
+#define XCHAL_HAVE_DFPU_SINGLE_ONLY    0                 	/* DFPU Coprocessor, single precision only */
+#define XCHAL_HAVE_DFPU_SINGLE_DOUBLE  0               	/* DFPU Coprocessor, single and double precision */
+#define XCHAL_HAVE_VECTRA1		0	/* Vectra I  pkg */
+#define XCHAL_HAVE_VECTRALX		0	/* Vectra LX pkg */
+#define XCHAL_HAVE_PDX4		        0	/* PDX4 */
+#define XCHAL_HAVE_CONNXD2		0	/* ConnX D2 pkg */
+#define XCHAL_HAVE_CONNXD2_DUALLSFLIX   0	/* ConnX D2 & Dual LoadStore Flix */
+#define XCHAL_HAVE_BBE16		0	/* ConnX BBE16 pkg */
+#define XCHAL_HAVE_BBE16_RSQRT		0	/* BBE16 & vector recip sqrt */
+#define XCHAL_HAVE_BBE16_VECDIV		0	/* BBE16 & vector divide */
+#define XCHAL_HAVE_BBE16_DESPREAD	0	/* BBE16 & despread */
+#define XCHAL_HAVE_BBENEP		0	/* ConnX BBENEP pkgs */
+#define XCHAL_HAVE_BSP3			0	/* ConnX BSP3 pkg */
+#define XCHAL_HAVE_BSP3_TRANSPOSE	0	/* BSP3 & transpose32x32 */
+#define XCHAL_HAVE_SSP16		0	/* ConnX SSP16 pkg */
+#define XCHAL_HAVE_SSP16_VITERBI	0	/* SSP16 & viterbi */
+#define XCHAL_HAVE_TURBO16		0	/* ConnX Turbo16 pkg */
+#define XCHAL_HAVE_BBP16		0	/* ConnX BBP16 pkg */
+#define XCHAL_HAVE_FLIX3		0	/* basic 3-way FLIX option */
+#define XCHAL_HAVE_GRIVPEP              0   /*  GRIVPEP is General Release of IVPEP */
+#define XCHAL_HAVE_GRIVPEP_HISTOGRAM    0   /* Histogram option on GRIVPEP */
+
+
+/*----------------------------------------------------------------------
+				MISC
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_LOADSTORE_UNITS	1	/* load/store units */
+#define XCHAL_NUM_WRITEBUFFER_ENTRIES	8	/* size of write buffer */
+#define XCHAL_INST_FETCH_WIDTH		8	/* instr-fetch width in bytes */
+#define XCHAL_DATA_WIDTH		8	/* data width in bytes */
+#define XCHAL_DATA_PIPE_DELAY		1	/* d-side pipeline delay
+						   (1 = 5-stage, 2 = 7-stage) */
+#define XCHAL_CLOCK_GATING_GLOBAL	0	/* global clock gating */
+#define XCHAL_CLOCK_GATING_FUNCUNIT	0	/* funct. unit clock gating */
+/*  In T1050, applies to selected core load and store instructions (see ISA): */
+#define XCHAL_UNALIGNED_LOAD_EXCEPTION	1	/* unaligned loads cause exc. */
+#define XCHAL_UNALIGNED_STORE_EXCEPTION	1	/* unaligned stores cause exc.*/
+#define XCHAL_UNALIGNED_LOAD_HW		0	/* unaligned loads work in hw */
+#define XCHAL_UNALIGNED_STORE_HW	0	/* unaligned stores work in hw*/
+
+#define XCHAL_SW_VERSION		1100002	/* sw version of this header */
+
+#define XCHAL_CORE_ID			"test_kc705_be"	/* alphanum core name
+						   (CoreID) set in the Xtensa
+						   Processor Generator */
+
+#define XCHAL_BUILD_UNIQUE_ID		0x00058D8C	/* 22-bit sw build ID */
+
+/*
+ *  These definitions describe the hardware targeted by this software.
+ */
+#define XCHAL_HW_CONFIGID0		0xC1B3FFFF	/* ConfigID hi 32 bits*/
+#define XCHAL_HW_CONFIGID1		0x1C858D8C	/* ConfigID lo 32 bits*/
+#define XCHAL_HW_VERSION_NAME		"LX6.0.2"	/* full version name */
+#define XCHAL_HW_VERSION_MAJOR		2600	/* major ver# of targeted hw */
+#define XCHAL_HW_VERSION_MINOR		2	/* minor ver# of targeted hw */
+#define XCHAL_HW_VERSION		260002	/* major*100+minor */
+#define XCHAL_HW_REL_LX6		1
+#define XCHAL_HW_REL_LX6_0		1
+#define XCHAL_HW_REL_LX6_0_2		1
+#define XCHAL_HW_CONFIGID_RELIABLE	1
+/*  If software targets a *range* of hardware versions, these are the bounds: */
+#define XCHAL_HW_MIN_VERSION_MAJOR	2600	/* major v of earliest tgt hw */
+#define XCHAL_HW_MIN_VERSION_MINOR	2	/* minor v of earliest tgt hw */
+#define XCHAL_HW_MIN_VERSION		260002	/* earliest targeted hw */
+#define XCHAL_HW_MAX_VERSION_MAJOR	2600	/* major v of latest tgt hw */
+#define XCHAL_HW_MAX_VERSION_MINOR	2	/* minor v of latest tgt hw */
+#define XCHAL_HW_MAX_VERSION		260002	/* latest targeted hw */
+
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_ICACHE_LINESIZE		32	/* I-cache line size in bytes */
+#define XCHAL_DCACHE_LINESIZE		32	/* D-cache line size in bytes */
+#define XCHAL_ICACHE_LINEWIDTH		5	/* log2(I line size in bytes) */
+#define XCHAL_DCACHE_LINEWIDTH		5	/* log2(D line size in bytes) */
+
+#define XCHAL_ICACHE_SIZE		16384	/* I-cache size in bytes or 0 */
+#define XCHAL_DCACHE_SIZE		16384	/* D-cache size in bytes or 0 */
+
+#define XCHAL_DCACHE_IS_WRITEBACK	1	/* writeback feature */
+#define XCHAL_DCACHE_IS_COHERENT	0	/* MP coherence feature */
+
+#define XCHAL_HAVE_PREFETCH		1	/* PREFCTL register */
+#define XCHAL_HAVE_PREFETCH_L1		0	/* prefetch to L1 dcache */
+#define XCHAL_PREFETCH_CASTOUT_LINES	1	/* dcache pref. castout bufsz */
+#define XCHAL_PREFETCH_ENTRIES		8	/* cache prefetch entries */
+#define XCHAL_PREFETCH_BLOCK_ENTRIES	0	/* prefetch block streams */
+#define XCHAL_HAVE_CACHE_BLOCKOPS	0	/* block prefetch for caches */
+#define XCHAL_HAVE_ICACHE_TEST		1	/* Icache test instructions */
+#define XCHAL_HAVE_DCACHE_TEST		1	/* Dcache test instructions */
+#define XCHAL_HAVE_ICACHE_DYN_WAYS	0	/* Icache dynamic way support */
+#define XCHAL_HAVE_DCACHE_DYN_WAYS	0	/* Dcache dynamic way support */
+
+
+
+
+/****************************************************************************
+    Parameters Useful for PRIVILEGED (Supervisory or Non-Virtualized) Code
+ ****************************************************************************/
+
+
+#ifndef XTENSA_HAL_NON_PRIVILEGED_ONLY
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_PIF			1	/* any outbound PIF present */
+
+/*  If present, cache size in bytes == (ways * 2^(linewidth + setwidth)).  */
+
+/*  Number of cache sets in log2(lines per way):  */
+#define XCHAL_ICACHE_SETWIDTH		7
+#define XCHAL_DCACHE_SETWIDTH		7
+
+/*  Cache set associativity (number of ways):  */
+#define XCHAL_ICACHE_WAYS		4
+#define XCHAL_DCACHE_WAYS		4
+
+/*  Cache features:  */
+#define XCHAL_ICACHE_LINE_LOCKABLE	1
+#define XCHAL_DCACHE_LINE_LOCKABLE	1
+#define XCHAL_ICACHE_ECC_PARITY		0
+#define XCHAL_DCACHE_ECC_PARITY		0
+
+/*  Cache access size in bytes (affects operation of SICW instruction):  */
+#define XCHAL_ICACHE_ACCESS_SIZE	8
+#define XCHAL_DCACHE_ACCESS_SIZE	8
+
+#define XCHAL_DCACHE_BANKS		1	/* number of banks */
+
+/*  Number of encoded cache attr bits (see <xtensa/hal.h> for decoded bits):  */
+#define XCHAL_CA_BITS			4
+
+/*  Whether MEMCTL register has anything useful  */
+#define XCHAL_USE_MEMCTL		(((XCHAL_LOOP_BUFFER_SIZE > 0)	||	\
+					   XCHAL_DCACHE_IS_COHERENT	||	\
+					   XCHAL_HAVE_ICACHE_DYN_WAYS	||	\
+					   XCHAL_HAVE_DCACHE_DYN_WAYS)	&&	\
+					   (XCHAL_HW_MIN_VERSION >= XTENSA_HWVERSION_RE_2012_0))
+
+
+/*----------------------------------------------------------------------
+			INTERNAL I/D RAM/ROMs and XLMI
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_INSTROM		0	/* number of core instr. ROMs */
+#define XCHAL_NUM_INSTRAM		0	/* number of core instr. RAMs */
+#define XCHAL_NUM_DATAROM		0	/* number of core data ROMs */
+#define XCHAL_NUM_DATARAM		0	/* number of core data RAMs */
+#define XCHAL_NUM_URAM			0	/* number of core unified RAMs*/
+#define XCHAL_NUM_XLMI			0	/* number of core XLMI ports */
+
+#define XCHAL_HAVE_IMEM_LOADSTORE	1	/* can load/store to IROM/IRAM*/
+
+
+/*----------------------------------------------------------------------
+			INTERRUPTS and TIMERS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_INTERRUPTS		1	/* interrupt option */
+#define XCHAL_HAVE_HIGHPRI_INTERRUPTS	1	/* med/high-pri. interrupts */
+#define XCHAL_HAVE_NMI			1	/* non-maskable interrupt */
+#define XCHAL_HAVE_CCOUNT		1	/* CCOUNT reg. (timer option) */
+#define XCHAL_NUM_TIMERS		3	/* number of CCOMPAREn regs */
+#define XCHAL_NUM_INTERRUPTS		22	/* number of interrupts */
+#define XCHAL_NUM_INTERRUPTS_LOG2	5	/* ceil(log2(NUM_INTERRUPTS)) */
+#define XCHAL_NUM_EXTINTERRUPTS		16	/* num of external interrupts */
+#define XCHAL_NUM_INTLEVELS		6	/* number of interrupt levels
+						   (not including level zero) */
+#define XCHAL_EXCM_LEVEL		4	/* level masked by PS.EXCM */
+	/* (always 1 in XEA1; levels 2 .. EXCM_LEVEL are "medium priority") */
+
+/*  Masks of interrupts at each interrupt level:  */
+#define XCHAL_INTLEVEL1_MASK		0x001F00BF
+#define XCHAL_INTLEVEL2_MASK		0x00000140
+#define XCHAL_INTLEVEL3_MASK		0x00200E00
+#define XCHAL_INTLEVEL4_MASK		0x00008000
+#define XCHAL_INTLEVEL5_MASK		0x00003000
+#define XCHAL_INTLEVEL6_MASK		0x00000000
+#define XCHAL_INTLEVEL7_MASK		0x00004000
+
+/*  Masks of interrupts at each range 1..n of interrupt levels:  */
+#define XCHAL_INTLEVEL1_ANDBELOW_MASK	0x001F00BF
+#define XCHAL_INTLEVEL2_ANDBELOW_MASK	0x001F01FF
+#define XCHAL_INTLEVEL3_ANDBELOW_MASK	0x003F0FFF
+#define XCHAL_INTLEVEL4_ANDBELOW_MASK	0x003F8FFF
+#define XCHAL_INTLEVEL5_ANDBELOW_MASK	0x003FBFFF
+#define XCHAL_INTLEVEL6_ANDBELOW_MASK	0x003FBFFF
+#define XCHAL_INTLEVEL7_ANDBELOW_MASK	0x003FFFFF
+
+/*  Level of each interrupt:  */
+#define XCHAL_INT0_LEVEL		1
+#define XCHAL_INT1_LEVEL		1
+#define XCHAL_INT2_LEVEL		1
+#define XCHAL_INT3_LEVEL		1
+#define XCHAL_INT4_LEVEL		1
+#define XCHAL_INT5_LEVEL		1
+#define XCHAL_INT6_LEVEL		2
+#define XCHAL_INT7_LEVEL		1
+#define XCHAL_INT8_LEVEL		2
+#define XCHAL_INT9_LEVEL		3
+#define XCHAL_INT10_LEVEL		3
+#define XCHAL_INT11_LEVEL		3
+#define XCHAL_INT12_LEVEL		5
+#define XCHAL_INT13_LEVEL		5
+#define XCHAL_INT14_LEVEL		7
+#define XCHAL_INT15_LEVEL		4
+#define XCHAL_INT16_LEVEL		1
+#define XCHAL_INT17_LEVEL		1
+#define XCHAL_INT18_LEVEL		1
+#define XCHAL_INT19_LEVEL		1
+#define XCHAL_INT20_LEVEL		1
+#define XCHAL_INT21_LEVEL		3
+#define XCHAL_DEBUGLEVEL		6	/* debug interrupt level */
+#define XCHAL_HAVE_DEBUG_EXTERN_INT	1	/* OCD external db interrupt */
+#define XCHAL_NMILEVEL			7	/* NMI "level" (for use with
+						   EXCSAVE/EPS/EPC_n, RFI n) */
+
+/*  Type of each interrupt:  */
+#define XCHAL_INT0_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT1_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT2_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT3_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT4_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT5_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT6_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT7_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT8_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT9_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT10_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT11_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT12_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT13_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT14_TYPE 	XTHAL_INTTYPE_NMI
+#define XCHAL_INT15_TYPE 	XTHAL_INTTYPE_PROFILING
+#define XCHAL_INT16_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT17_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT18_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT19_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT20_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT21_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+
+/*  Masks of interrupts for each type of interrupt:  */
+#define XCHAL_INTTYPE_MASK_UNCONFIGURED	0xFFC00000
+#define XCHAL_INTTYPE_MASK_SOFTWARE	0x00000880
+#define XCHAL_INTTYPE_MASK_EXTERN_EDGE	0x003F0000
+#define XCHAL_INTTYPE_MASK_EXTERN_LEVEL	0x0000133F
+#define XCHAL_INTTYPE_MASK_TIMER	0x00002440
+#define XCHAL_INTTYPE_MASK_NMI		0x00004000
+#define XCHAL_INTTYPE_MASK_WRITE_ERROR	0x00000000
+#define XCHAL_INTTYPE_MASK_PROFILING	0x00008000
+
+/*  Interrupt numbers assigned to specific interrupt sources:  */
+#define XCHAL_TIMER0_INTERRUPT		6	/* CCOMPARE0 */
+#define XCHAL_TIMER1_INTERRUPT		10	/* CCOMPARE1 */
+#define XCHAL_TIMER2_INTERRUPT		13	/* CCOMPARE2 */
+#define XCHAL_TIMER3_INTERRUPT		XTHAL_TIMER_UNCONFIGURED
+#define XCHAL_NMI_INTERRUPT		14	/* non-maskable interrupt */
+#define XCHAL_PROFILING_INTERRUPT	15	/* profiling interrupt */
+
+/*  Interrupt numbers for levels at which only one interrupt is configured:  */
+#define XCHAL_INTLEVEL4_NUM		15
+#define XCHAL_INTLEVEL7_NUM		14
+/*  (There are many interrupts each at level(s) 1, 2, 3, 5.)  */
+
+
+/*
+ *  External interrupt mapping.
+ *  These macros describe how Xtensa processor interrupt numbers
+ *  (as numbered internally, eg. in INTERRUPT and INTENABLE registers)
+ *  map to external BInterrupt<n> pins, for those interrupts
+ *  configured as external (level-triggered, edge-triggered, or NMI).
+ *  See the Xtensa processor databook for more details.
+ */
+
+/*  Core interrupt numbers mapped to each EXTERNAL BInterrupt pin number:  */
+#define XCHAL_EXTINT0_NUM		0	/* (intlevel 1) */
+#define XCHAL_EXTINT1_NUM		1	/* (intlevel 1) */
+#define XCHAL_EXTINT2_NUM		2	/* (intlevel 1) */
+#define XCHAL_EXTINT3_NUM		3	/* (intlevel 1) */
+#define XCHAL_EXTINT4_NUM		4	/* (intlevel 1) */
+#define XCHAL_EXTINT5_NUM		5	/* (intlevel 1) */
+#define XCHAL_EXTINT6_NUM		8	/* (intlevel 2) */
+#define XCHAL_EXTINT7_NUM		9	/* (intlevel 3) */
+#define XCHAL_EXTINT8_NUM		12	/* (intlevel 5) */
+#define XCHAL_EXTINT9_NUM		14	/* (intlevel 7) */
+#define XCHAL_EXTINT10_NUM		16	/* (intlevel 1) */
+#define XCHAL_EXTINT11_NUM		17	/* (intlevel 1) */
+#define XCHAL_EXTINT12_NUM		18	/* (intlevel 1) */
+#define XCHAL_EXTINT13_NUM		19	/* (intlevel 1) */
+#define XCHAL_EXTINT14_NUM		20	/* (intlevel 1) */
+#define XCHAL_EXTINT15_NUM		21	/* (intlevel 3) */
+/*  EXTERNAL BInterrupt pin numbers mapped to each core interrupt number:  */
+#define XCHAL_INT0_EXTNUM		0	/* (intlevel 1) */
+#define XCHAL_INT1_EXTNUM		1	/* (intlevel 1) */
+#define XCHAL_INT2_EXTNUM		2	/* (intlevel 1) */
+#define XCHAL_INT3_EXTNUM		3	/* (intlevel 1) */
+#define XCHAL_INT4_EXTNUM		4	/* (intlevel 1) */
+#define XCHAL_INT5_EXTNUM		5	/* (intlevel 1) */
+#define XCHAL_INT8_EXTNUM		6	/* (intlevel 2) */
+#define XCHAL_INT9_EXTNUM		7	/* (intlevel 3) */
+#define XCHAL_INT12_EXTNUM		8	/* (intlevel 5) */
+#define XCHAL_INT14_EXTNUM		9	/* (intlevel 7) */
+#define XCHAL_INT16_EXTNUM		10	/* (intlevel 1) */
+#define XCHAL_INT17_EXTNUM		11	/* (intlevel 1) */
+#define XCHAL_INT18_EXTNUM		12	/* (intlevel 1) */
+#define XCHAL_INT19_EXTNUM		13	/* (intlevel 1) */
+#define XCHAL_INT20_EXTNUM		14	/* (intlevel 1) */
+#define XCHAL_INT21_EXTNUM		15	/* (intlevel 3) */
+
+
+/*----------------------------------------------------------------------
+			EXCEPTIONS and VECTORS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_XEA_VERSION		2	/* Xtensa Exception Architecture
+						   number: 1 == XEA1 (old)
+							   2 == XEA2 (new)
+							   0 == XEAX (extern) or TX */
+#define XCHAL_HAVE_XEA1			0	/* Exception Architecture 1 */
+#define XCHAL_HAVE_XEA2			1	/* Exception Architecture 2 */
+#define XCHAL_HAVE_XEAX			0	/* External Exception Arch. */
+#define XCHAL_HAVE_EXCEPTIONS		1	/* exception option */
+#define XCHAL_HAVE_HALT			0	/* halt architecture option */
+#define XCHAL_HAVE_BOOTLOADER		0	/* boot loader (for TX) */
+#define XCHAL_HAVE_MEM_ECC_PARITY	0	/* local memory ECC/parity */
+#define XCHAL_HAVE_VECTOR_SELECT	1	/* relocatable vectors */
+#define XCHAL_HAVE_VECBASE		1	/* relocatable vectors */
+#define XCHAL_VECBASE_RESET_VADDR	0x00002000  /* VECBASE reset value */
+#define XCHAL_VECBASE_RESET_PADDR	0x00002000
+#define XCHAL_RESET_VECBASE_OVERLAP	0
+
+#define XCHAL_RESET_VECTOR0_VADDR	0xFE000000
+#define XCHAL_RESET_VECTOR0_PADDR	0xFE000000
+#define XCHAL_RESET_VECTOR1_VADDR	0x00001000
+#define XCHAL_RESET_VECTOR1_PADDR	0x00001000
+#define XCHAL_RESET_VECTOR_VADDR	0xFE000000
+#define XCHAL_RESET_VECTOR_PADDR	0xFE000000
+#define XCHAL_USER_VECOFS		0x00000340
+#define XCHAL_USER_VECTOR_VADDR		0x00002340
+#define XCHAL_USER_VECTOR_PADDR		0x00002340
+#define XCHAL_KERNEL_VECOFS		0x00000300
+#define XCHAL_KERNEL_VECTOR_VADDR	0x00002300
+#define XCHAL_KERNEL_VECTOR_PADDR	0x00002300
+#define XCHAL_DOUBLEEXC_VECOFS		0x000003C0
+#define XCHAL_DOUBLEEXC_VECTOR_VADDR	0x000023C0
+#define XCHAL_DOUBLEEXC_VECTOR_PADDR	0x000023C0
+#define XCHAL_WINDOW_OF4_VECOFS		0x00000000
+#define XCHAL_WINDOW_UF4_VECOFS		0x00000040
+#define XCHAL_WINDOW_OF8_VECOFS		0x00000080
+#define XCHAL_WINDOW_UF8_VECOFS		0x000000C0
+#define XCHAL_WINDOW_OF12_VECOFS	0x00000100
+#define XCHAL_WINDOW_UF12_VECOFS	0x00000140
+#define XCHAL_WINDOW_VECTORS_VADDR	0x00002000
+#define XCHAL_WINDOW_VECTORS_PADDR	0x00002000
+#define XCHAL_INTLEVEL2_VECOFS		0x00000180
+#define XCHAL_INTLEVEL2_VECTOR_VADDR	0x00002180
+#define XCHAL_INTLEVEL2_VECTOR_PADDR	0x00002180
+#define XCHAL_INTLEVEL3_VECOFS		0x000001C0
+#define XCHAL_INTLEVEL3_VECTOR_VADDR	0x000021C0
+#define XCHAL_INTLEVEL3_VECTOR_PADDR	0x000021C0
+#define XCHAL_INTLEVEL4_VECOFS		0x00000200
+#define XCHAL_INTLEVEL4_VECTOR_VADDR	0x00002200
+#define XCHAL_INTLEVEL4_VECTOR_PADDR	0x00002200
+#define XCHAL_INTLEVEL5_VECOFS		0x00000240
+#define XCHAL_INTLEVEL5_VECTOR_VADDR	0x00002240
+#define XCHAL_INTLEVEL5_VECTOR_PADDR	0x00002240
+#define XCHAL_INTLEVEL6_VECOFS		0x00000280
+#define XCHAL_INTLEVEL6_VECTOR_VADDR	0x00002280
+#define XCHAL_INTLEVEL6_VECTOR_PADDR	0x00002280
+#define XCHAL_DEBUG_VECOFS		XCHAL_INTLEVEL6_VECOFS
+#define XCHAL_DEBUG_VECTOR_VADDR	XCHAL_INTLEVEL6_VECTOR_VADDR
+#define XCHAL_DEBUG_VECTOR_PADDR	XCHAL_INTLEVEL6_VECTOR_PADDR
+#define XCHAL_NMI_VECOFS		0x000002C0
+#define XCHAL_NMI_VECTOR_VADDR		0x000022C0
+#define XCHAL_NMI_VECTOR_PADDR		0x000022C0
+#define XCHAL_INTLEVEL7_VECOFS		XCHAL_NMI_VECOFS
+#define XCHAL_INTLEVEL7_VECTOR_VADDR	XCHAL_NMI_VECTOR_VADDR
+#define XCHAL_INTLEVEL7_VECTOR_PADDR	XCHAL_NMI_VECTOR_PADDR
+
+
+/*----------------------------------------------------------------------
+				DEBUG MODULE
+  ----------------------------------------------------------------------*/
+
+/*  Misc  */
+#define XCHAL_HAVE_DEBUG_ERI		1	/* ERI to debug module */
+#define XCHAL_HAVE_DEBUG_APB		0	/* APB to debug module */
+#define XCHAL_HAVE_DEBUG_JTAG		1	/* JTAG to debug module */
+
+/*  On-Chip Debug (OCD)  */
+#define XCHAL_HAVE_OCD			1	/* OnChipDebug option */
+#define XCHAL_NUM_IBREAK		2	/* number of IBREAKn regs */
+#define XCHAL_NUM_DBREAK		2	/* number of DBREAKn regs */
+#define XCHAL_HAVE_OCD_DIR_ARRAY	0	/* faster OCD option (to LX4) */
+#define XCHAL_HAVE_OCD_LS32DDR		1	/* L32DDR/S32DDR (faster OCD) */
+
+/*  TRAX (in core)  */
+#define XCHAL_HAVE_TRAX			1	/* TRAX in debug module */
+#define XCHAL_TRAX_MEM_SIZE		262144	/* TRAX memory size in bytes */
+#define XCHAL_TRAX_MEM_SHAREABLE	1	/* start/end regs; ready sig. */
+#define XCHAL_TRAX_ATB_WIDTH		0	/* ATB width (bits), 0=no ATB */
+#define XCHAL_TRAX_TIME_WIDTH		0	/* timestamp bitwidth, 0=none */
+
+/*  Perf counters  */
+#define XCHAL_NUM_PERF_COUNTERS		8	/* performance counters */
+
+
+/*----------------------------------------------------------------------
+				MMU
+  ----------------------------------------------------------------------*/
+
+/*  See core-matmap.h header file for more details.  */
+
+#define XCHAL_HAVE_TLBS			1	/* inverse of HAVE_CACHEATTR */
+#define XCHAL_HAVE_SPANNING_WAY		1	/* one way maps I+D 4GB vaddr */
+#define XCHAL_SPANNING_WAY		6	/* TLB spanning way number */
+#define XCHAL_HAVE_IDENTITY_MAP		0	/* vaddr == paddr always */
+#define XCHAL_HAVE_CACHEATTR		0	/* CACHEATTR register present */
+#define XCHAL_HAVE_MIMIC_CACHEATTR	0	/* region protection */
+#define XCHAL_HAVE_XLT_CACHEATTR	0	/* region prot. w/translation */
+#define XCHAL_HAVE_PTP_MMU		1	/* full MMU (with page table
+						   [autorefill] and protection)
+						   usable for an MMU-based OS */
+/*  If none of the above last 4 are set, it's a custom TLB configuration.  */
+#define XCHAL_ITLB_ARF_ENTRIES_LOG2	2	/* log2(autorefill way size) */
+#define XCHAL_DTLB_ARF_ENTRIES_LOG2	2	/* log2(autorefill way size) */
+
+#define XCHAL_MMU_ASID_BITS		8	/* number of bits in ASIDs */
+#define XCHAL_MMU_RINGS			4	/* number of rings (1..4) */
+#define XCHAL_MMU_RING_BITS		2	/* num of bits in RING field */
+
+#endif /* !XTENSA_HAL_NON_PRIVILEGED_ONLY */
+
+
+#endif /* _XTENSA_CORE_CONFIGURATION_H */
+
diff --git a/arch/xtensa/variants/test_kc705_be/include/variant/tie-asm.h b/arch/xtensa/variants/test_kc705_be/include/variant/tie-asm.h
new file mode 100644
index 000000000..b87fe1a51
--- /dev/null
+++ b/arch/xtensa/variants/test_kc705_be/include/variant/tie-asm.h
@@ -0,0 +1,308 @@
+/* 
+ * tie-asm.h -- compile-time HAL assembler definitions dependent on CORE & TIE
+ *
+ *  NOTE:  This header file is not meant to be included directly.
+ */
+
+/* This header file contains assembly-language definitions (assembly
+   macros, etc.) for this specific Xtensa processor's TIE extensions
+   and options.  It is customized to this Xtensa processor configuration.
+
+   Copyright (c) 1999-2015 Cadence Design Systems Inc.
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be included
+   in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _XTENSA_CORE_TIE_ASM_H
+#define _XTENSA_CORE_TIE_ASM_H
+
+/*  Selection parameter values for save-area save/restore macros:  */
+/*  Option vs. TIE:  */
+#define XTHAL_SAS_TIE	0x0001	/* custom extension or coprocessor */
+#define XTHAL_SAS_OPT	0x0002	/* optional (and not a coprocessor) */
+#define XTHAL_SAS_ANYOT	0x0003	/* both of the above */
+/*  Whether used automatically by compiler:  */
+#define XTHAL_SAS_NOCC	0x0004	/* not used by compiler w/o special opts/code */
+#define XTHAL_SAS_CC	0x0008	/* used by compiler without special opts/code */
+#define XTHAL_SAS_ANYCC	0x000C	/* both of the above */
+/*  ABI handling across function calls:  */
+#define XTHAL_SAS_CALR	0x0010	/* caller-saved */
+#define XTHAL_SAS_CALE	0x0020	/* callee-saved */
+#define XTHAL_SAS_GLOB	0x0040	/* global across function calls (in thread) */
+#define XTHAL_SAS_ANYABI	0x0070	/* all of the above three */
+/*  Misc  */
+#define XTHAL_SAS_ALL	0xFFFF	/* include all default NCP contents */
+#define XTHAL_SAS3(optie,ccuse,abi)	( ((optie) & XTHAL_SAS_ANYOT)  \
+					| ((ccuse) & XTHAL_SAS_ANYCC)  \
+					| ((abi)   & XTHAL_SAS_ANYABI) )
+
+
+    /*
+      *  Macro to store all non-coprocessor (extra) custom TIE and optional state
+      *  (not including zero-overhead loop registers).
+      *  Required parameters:
+      *      ptr         Save area pointer address register (clobbered)
+      *                  (register must contain a 4 byte aligned address).
+      *      at1..at4    Four temporary address registers (first XCHAL_NCP_NUM_ATMPS
+      *                  registers are clobbered, the remaining are unused).
+      *  Optional parameters:
+      *      continue    If macro invoked as part of a larger store sequence, set to 1
+      *                  if this is not the first in the sequence.  Defaults to 0.
+      *      ofs         Offset from start of larger sequence (from value of first ptr
+      *                  in sequence) at which to store.  Defaults to next available space
+      *                  (or 0 if <continue> is 0).
+      *      select      Select what category(ies) of registers to store, as a bitmask
+      *                  (see XTHAL_SAS_xxx constants).  Defaults to all registers.
+      *      alloc       Select what category(ies) of registers to allocate; if any
+      *                  category is selected here that is not in <select>, space for
+      *                  the corresponding registers is skipped without doing any store.
+      */
+    .macro xchal_ncp_store  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
+	xchal_sa_start	\continue, \ofs
+	// Optional global registers used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1020, 4, 4
+	rur.THREADPTR	\at1		// threadptr option
+	s32i	\at1, \ptr, .Lxchal_ofs_+0
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1020, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	// Optional caller-saved registers used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	rsr.ACCLO	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+0
+	rsr.ACCHI	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.endif
+	// Optional caller-saved registers not used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1000, 4, 4
+	rsr.BR	\at1		// boolean option
+	s32i	\at1, \ptr, .Lxchal_ofs_+0
+	rsr.SCOMPARE1	\at1		// conditional store option
+	s32i	\at1, \ptr, .Lxchal_ofs_+4
+	rsr.M0	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+8
+	rsr.M1	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+12
+	rsr.M2	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+16
+	rsr.M3	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+20
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 24
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1000, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 24
+	.endif
+    .endm	// xchal_ncp_store
+
+    /*
+      *  Macro to load all non-coprocessor (extra) custom TIE and optional state
+      *  (not including zero-overhead loop registers).
+      *  Required parameters:
+      *      ptr         Save area pointer address register (clobbered)
+      *                  (register must contain a 4 byte aligned address).
+      *      at1..at4    Four temporary address registers (first XCHAL_NCP_NUM_ATMPS
+      *                  registers are clobbered, the remaining are unused).
+      *  Optional parameters:
+      *      continue    If macro invoked as part of a larger load sequence, set to 1
+      *                  if this is not the first in the sequence.  Defaults to 0.
+      *      ofs         Offset from start of larger sequence (from value of first ptr
+      *                  in sequence) at which to load.  Defaults to next available space
+      *                  (or 0 if <continue> is 0).
+      *      select      Select what category(ies) of registers to load, as a bitmask
+      *                  (see XTHAL_SAS_xxx constants).  Defaults to all registers.
+      *      alloc       Select what category(ies) of registers to allocate; if any
+      *                  category is selected here that is not in <select>, space for
+      *                  the corresponding registers is skipped without doing any load.
+      */
+    .macro xchal_ncp_load  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
+	xchal_sa_start	\continue, \ofs
+	// Optional global registers used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1020, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_+0
+	wur.THREADPTR	\at1		// threadptr option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1020, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	// Optional caller-saved registers used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_+0
+	wsr.ACCLO	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+4
+	wsr.ACCHI	\at1		// MAC16 option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.endif
+	// Optional caller-saved registers not used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1000, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_+0
+	wsr.BR	\at1		// boolean option
+	l32i	\at1, \ptr, .Lxchal_ofs_+4
+	wsr.SCOMPARE1	\at1		// conditional store option
+	l32i	\at1, \ptr, .Lxchal_ofs_+8
+	wsr.M0	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+12
+	wsr.M1	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+16
+	wsr.M2	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+20
+	wsr.M3	\at1		// MAC16 option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 24
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1000, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 24
+	.endif
+    .endm	// xchal_ncp_load
+
+
+#define XCHAL_NCP_NUM_ATMPS	1
+
+    /* 
+     *  Macro to store the state of TIE coprocessor AudioEngineLX.
+     *  Required parameters:
+     *      ptr         Save area pointer address register (clobbered)
+     *                  (register must contain a 8 byte aligned address).
+     *      at1..at4    Four temporary address registers (first XCHAL_CP1_NUM_ATMPS
+     *                  registers are clobbered, the remaining are unused).
+     *  Optional parameters are the same as for xchal_ncp_store.
+     */
+#define xchal_cp_AudioEngineLX_store	xchal_cp1_store
+    .macro	xchal_cp1_store  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
+	xchal_sa_start \continue, \ofs
+	// Custom caller-saved registers not used by default by the compiler:
+	.ifeq (XTHAL_SAS_TIE | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 0, 8, 8
+	rur.AE_OVF_SAR	\at1		// ureg 240
+	s32i	\at1, \ptr, .Lxchal_ofs_+0
+	rur.AE_BITHEAD	\at1		// ureg 241
+	s32i	\at1, \ptr, .Lxchal_ofs_+4
+	rur.AE_TS_FTS_BU_BP	\at1		// ureg 242
+	s32i	\at1, \ptr, .Lxchal_ofs_+8
+	rur.AE_SD_NO	\at1		// ureg 243
+	s32i	\at1, \ptr, .Lxchal_ofs_+12
+	rur.AE_CBEGIN0	\at1		// ureg 246
+	s32i	\at1, \ptr, .Lxchal_ofs_+16
+	rur.AE_CEND0	\at1		// ureg 247
+	s32i	\at1, \ptr, .Lxchal_ofs_+20
+	ae_sp24x2s.i	aep0, \ptr, .Lxchal_ofs_+24
+	ae_sp24x2s.i	aep1, \ptr, .Lxchal_ofs_+32
+	ae_sp24x2s.i	aep2, \ptr, .Lxchal_ofs_+40
+	ae_sp24x2s.i	aep3, \ptr, .Lxchal_ofs_+48
+	ae_sp24x2s.i	aep4, \ptr, .Lxchal_ofs_+56
+	addi	\ptr, \ptr, 64
+	ae_sp24x2s.i	aep5, \ptr, .Lxchal_ofs_+0
+	ae_sp24x2s.i	aep6, \ptr, .Lxchal_ofs_+8
+	ae_sp24x2s.i	aep7, \ptr, .Lxchal_ofs_+16
+	ae_sq56s.i	aeq0, \ptr, .Lxchal_ofs_+24
+	ae_sq56s.i	aeq1, \ptr, .Lxchal_ofs_+32
+	ae_sq56s.i	aeq2, \ptr, .Lxchal_ofs_+40
+	ae_sq56s.i	aeq3, \ptr, .Lxchal_ofs_+48
+	.set	.Lxchal_pofs_, .Lxchal_pofs_ + 64
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 56
+	.elseif ((XTHAL_SAS_TIE | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 0, 8, 8
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 120
+	.endif
+    .endm	// xchal_cp1_store
+
+    /* 
+     *  Macro to load the state of TIE coprocessor AudioEngineLX.
+     *  Required parameters:
+     *      ptr         Save area pointer address register (clobbered)
+     *                  (register must contain a 8 byte aligned address).
+     *      at1..at4    Four temporary address registers (first XCHAL_CP1_NUM_ATMPS
+     *                  registers are clobbered, the remaining are unused).
+     *  Optional parameters are the same as for xchal_ncp_load.
+     */
+#define xchal_cp_AudioEngineLX_load	xchal_cp1_load
+    .macro	xchal_cp1_load  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
+	xchal_sa_start \continue, \ofs
+	// Custom caller-saved registers not used by default by the compiler:
+	.ifeq (XTHAL_SAS_TIE | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 0, 8, 8
+	l32i	\at1, \ptr, .Lxchal_ofs_+0
+	wur.AE_OVF_SAR	\at1		// ureg 240
+	l32i	\at1, \ptr, .Lxchal_ofs_+4
+	wur.AE_BITHEAD	\at1		// ureg 241
+	l32i	\at1, \ptr, .Lxchal_ofs_+8
+	wur.AE_TS_FTS_BU_BP	\at1		// ureg 242
+	l32i	\at1, \ptr, .Lxchal_ofs_+12
+	wur.AE_SD_NO	\at1		// ureg 243
+	l32i	\at1, \ptr, .Lxchal_ofs_+16
+	wur.AE_CBEGIN0	\at1		// ureg 246
+	l32i	\at1, \ptr, .Lxchal_ofs_+20
+	wur.AE_CEND0	\at1		// ureg 247
+	ae_lp24x2.i	aep0, \ptr, .Lxchal_ofs_+24
+	ae_lp24x2.i	aep1, \ptr, .Lxchal_ofs_+32
+	ae_lp24x2.i	aep2, \ptr, .Lxchal_ofs_+40
+	ae_lp24x2.i	aep3, \ptr, .Lxchal_ofs_+48
+	ae_lp24x2.i	aep4, \ptr, .Lxchal_ofs_+56
+	addi	\ptr, \ptr, 64
+	ae_lp24x2.i	aep5, \ptr, .Lxchal_ofs_+0
+	ae_lp24x2.i	aep6, \ptr, .Lxchal_ofs_+8
+	ae_lp24x2.i	aep7, \ptr, .Lxchal_ofs_+16
+	addi	\ptr, \ptr, 24
+	ae_lq56.i	aeq0, \ptr, .Lxchal_ofs_+0
+	ae_lq56.i	aeq1, \ptr, .Lxchal_ofs_+8
+	ae_lq56.i	aeq2, \ptr, .Lxchal_ofs_+16
+	ae_lq56.i	aeq3, \ptr, .Lxchal_ofs_+24
+	.set	.Lxchal_pofs_, .Lxchal_pofs_ + 88
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 32
+	.elseif ((XTHAL_SAS_TIE | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 0, 8, 8
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 120
+	.endif
+    .endm	// xchal_cp1_load
+
+#define XCHAL_CP1_NUM_ATMPS	1
+#define XCHAL_SA_NUM_ATMPS	1
+
+	/*  Empty macros for unconfigured coprocessors:  */
+	.macro xchal_cp0_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp0_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp2_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp2_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp3_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp3_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp4_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp4_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp5_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp5_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp6_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp6_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp7_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp7_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+
+#endif /*_XTENSA_CORE_TIE_ASM_H*/
+
diff --git a/arch/xtensa/variants/test_kc705_be/include/variant/tie.h b/arch/xtensa/variants/test_kc705_be/include/variant/tie.h
new file mode 100644
index 000000000..4e1b4baac
--- /dev/null
+++ b/arch/xtensa/variants/test_kc705_be/include/variant/tie.h
@@ -0,0 +1,182 @@
+/* 
+ * tie.h -- compile-time HAL definitions dependent on CORE & TIE configuration
+ *
+ *  NOTE:  This header file is not meant to be included directly.
+ */
+
+/* This header file describes this specific Xtensa processor's TIE extensions
+   that extend basic Xtensa core functionality.  It is customized to this
+   Xtensa processor configuration.
+
+   Copyright (c) 1999-2015 Cadence Design Systems Inc.
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be included
+   in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _XTENSA_CORE_TIE_H
+#define _XTENSA_CORE_TIE_H
+
+#define XCHAL_CP_NUM			2	/* number of coprocessors */
+#define XCHAL_CP_MAX			8	/* max CP ID + 1 (0 if none) */
+#define XCHAL_CP_MASK			0x82	/* bitmask of all CPs by ID */
+#define XCHAL_CP_PORT_MASK		0x80	/* bitmask of only port CPs */
+
+/*  Basic parameters of each coprocessor:  */
+#define XCHAL_CP1_NAME			"AudioEngineLX"
+#define XCHAL_CP1_IDENT			AudioEngineLX
+#define XCHAL_CP1_SA_SIZE		120	/* size of state save area */
+#define XCHAL_CP1_SA_ALIGN		8	/* min alignment of save area */
+#define XCHAL_CP_ID_AUDIOENGINELX   	1	/* coprocessor ID (0..7) */
+#define XCHAL_CP7_NAME			"XTIOP"
+#define XCHAL_CP7_IDENT			XTIOP
+#define XCHAL_CP7_SA_SIZE		0	/* size of state save area */
+#define XCHAL_CP7_SA_ALIGN		1	/* min alignment of save area */
+#define XCHAL_CP_ID_XTIOP           	7	/* coprocessor ID (0..7) */
+
+/*  Filler info for unassigned coprocessors, to simplify arrays etc:  */
+#define XCHAL_CP0_SA_SIZE		0
+#define XCHAL_CP0_SA_ALIGN		1
+#define XCHAL_CP2_SA_SIZE		0
+#define XCHAL_CP2_SA_ALIGN		1
+#define XCHAL_CP3_SA_SIZE		0
+#define XCHAL_CP3_SA_ALIGN		1
+#define XCHAL_CP4_SA_SIZE		0
+#define XCHAL_CP4_SA_ALIGN		1
+#define XCHAL_CP5_SA_SIZE		0
+#define XCHAL_CP5_SA_ALIGN		1
+#define XCHAL_CP6_SA_SIZE		0
+#define XCHAL_CP6_SA_ALIGN		1
+
+/*  Save area for non-coprocessor optional and custom (TIE) state:  */
+#define XCHAL_NCP_SA_SIZE		36
+#define XCHAL_NCP_SA_ALIGN		4
+
+/*  Total save area for optional and custom state (NCP + CPn):  */
+#define XCHAL_TOTAL_SA_SIZE		160	/* with 16-byte align padding */
+#define XCHAL_TOTAL_SA_ALIGN		8	/* actual minimum alignment */
+
+/*
+ * Detailed contents of save areas.
+ * NOTE:  caller must define the XCHAL_SA_REG macro (not defined here)
+ * before expanding the XCHAL_xxx_SA_LIST() macros.
+ *
+ * XCHAL_SA_REG(s,ccused,abikind,kind,opt,name,galign,align,asize,
+ *		dbnum,base,regnum,bitsz,gapsz,reset,x...)
+ *
+ *	s = passed from XCHAL_*_LIST(s), eg. to select how to expand
+ *	ccused = set if used by compiler without special options or code
+ *	abikind = 0 (caller-saved), 1 (callee-saved), or 2 (thread-global)
+ *	kind = 0 (special reg), 1 (TIE user reg), or 2 (TIE regfile reg)
+ *	opt = 0 (custom TIE extension or coprocessor), or 1 (optional reg)
+ *	name = lowercase reg name (no quotes)
+ *	galign = group byte alignment (power of 2) (galign >= align)
+ *	align = register byte alignment (power of 2)
+ *	asize = allocated size in bytes (asize*8 == bitsz + gapsz + padsz)
+ *	  (not including any pad bytes required to galign this or next reg)
+ *	dbnum = unique target number f/debug (see <xtensa-libdb-macros.h>)
+ *	base = reg shortname w/o index (or sr=special, ur=TIE user reg)
+ *	regnum = reg index in regfile, or special/TIE-user reg number
+ *	bitsz = number of significant bits (regfile width, or ur/sr mask bits)
+ *	gapsz = intervening bits, if bitsz bits not stored contiguously
+ *	(padsz = pad bits at end [TIE regfile] or at msbits [ur,sr] of asize)
+ *	reset = register reset value (or 0 if undefined at reset)
+ *	x = reserved for future use (0 until then)
+ *
+ *  To filter out certain registers, e.g. to expand only the non-global
+ *  registers used by the compiler, you can do something like this:
+ *
+ *  #define XCHAL_SA_REG(s,ccused,p...)	SELCC##ccused(p)
+ *  #define SELCC0(p...)
+ *  #define SELCC1(abikind,p...)	SELAK##abikind(p)
+ *  #define SELAK0(p...)		REG(p)
+ *  #define SELAK1(p...)		REG(p)
+ *  #define SELAK2(p...)
+ *  #define REG(kind,tie,name,galn,aln,asz,csz,dbnum,base,rnum,bsz,rst,x...) \
+ *		...what you want to expand...
+ */
+
+#define XCHAL_NCP_SA_NUM	9
+#define XCHAL_NCP_SA_LIST(s)	\
+ XCHAL_SA_REG(s,1,2,1,1,      threadptr, 4, 4, 4,0x03E7,  ur,231, 32,0,0,0) \
+ XCHAL_SA_REG(s,1,0,0,1,          acclo, 4, 4, 4,0x0210,  sr,16 , 32,0,0,0) \
+ XCHAL_SA_REG(s,1,0,0,1,          acchi, 4, 4, 4,0x0211,  sr,17 ,  8,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             br, 4, 4, 4,0x0204,  sr,4  , 16,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,      scompare1, 4, 4, 4,0x020C,  sr,12 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m0, 4, 4, 4,0x0220,  sr,32 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m1, 4, 4, 4,0x0221,  sr,33 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m2, 4, 4, 4,0x0222,  sr,34 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m3, 4, 4, 4,0x0223,  sr,35 , 32,0,0,0)
+
+#define XCHAL_CP0_SA_NUM	0
+#define XCHAL_CP0_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP1_SA_NUM	18
+#define XCHAL_CP1_SA_LIST(s)	\
+ XCHAL_SA_REG(s,0,0,1,0,     ae_ovf_sar, 8, 4, 4,0x03F0,  ur,240,  7,0,0,0) \
+ XCHAL_SA_REG(s,0,0,1,0,     ae_bithead, 4, 4, 4,0x03F1,  ur,241, 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,1,0,ae_ts_fts_bu_bp, 4, 4, 4,0x03F2,  ur,242, 16,0,0,0) \
+ XCHAL_SA_REG(s,0,0,1,0,       ae_sd_no, 4, 4, 4,0x03F3,  ur,243, 28,0,0,0) \
+ XCHAL_SA_REG(s,0,0,1,0,     ae_cbegin0, 4, 4, 4,0x03F6,  ur,246, 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,1,0,       ae_cend0, 4, 4, 4,0x03F7,  ur,247, 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aep0, 8, 8, 8,0x0060, aep,0  , 48,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aep1, 8, 8, 8,0x0061, aep,1  , 48,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aep2, 8, 8, 8,0x0062, aep,2  , 48,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aep3, 8, 8, 8,0x0063, aep,3  , 48,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aep4, 8, 8, 8,0x0064, aep,4  , 48,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aep5, 8, 8, 8,0x0065, aep,5  , 48,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aep6, 8, 8, 8,0x0066, aep,6  , 48,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aep7, 8, 8, 8,0x0067, aep,7  , 48,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aeq0, 8, 8, 8,0x0068, aeq,0  , 56,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aeq1, 8, 8, 8,0x0069, aeq,1  , 56,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aeq2, 8, 8, 8,0x006A, aeq,2  , 56,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aeq3, 8, 8, 8,0x006B, aeq,3  , 56,0,0,0)
+
+#define XCHAL_CP2_SA_NUM	0
+#define XCHAL_CP2_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP3_SA_NUM	0
+#define XCHAL_CP3_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP4_SA_NUM	0
+#define XCHAL_CP4_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP5_SA_NUM	0
+#define XCHAL_CP5_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP6_SA_NUM	0
+#define XCHAL_CP6_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP7_SA_NUM	0
+#define XCHAL_CP7_SA_LIST(s)	/* empty */
+
+/* Byte length of instruction from its first nibble (op0 field), per FLIX.  */
+#define XCHAL_OP0_FORMAT_LENGTHS	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,8
+/* Byte length of instruction from its first byte, per FLIX.  */
+#define XCHAL_BYTE0_FORMAT_LENGTHS	\
+	3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,\
+	3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,\
+	3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,\
+	3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,\
+	2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,\
+	2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,\
+	2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,\
+	3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
+
+#endif /*_XTENSA_CORE_TIE_H*/
+
diff --git a/arch/xtensa/variants/test_kc705_hifi/include/variant/core.h b/arch/xtensa/variants/test_kc705_hifi/include/variant/core.h
new file mode 100644
index 000000000..4a2222979
--- /dev/null
+++ b/arch/xtensa/variants/test_kc705_hifi/include/variant/core.h
@@ -0,0 +1,531 @@
+/* 
+ * xtensa/config/core-isa.h -- HAL definitions that are dependent on Xtensa
+ *				processor CORE configuration
+ *
+ *  See <xtensa/config/core.h>, which includes this file, for more details.
+ */
+
+/* Xtensa processor core configuration information.
+
+   Copyright (c) 1999-2014 Tensilica Inc.
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be included
+   in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _XTENSA_CORE_CONFIGURATION_H
+#define _XTENSA_CORE_CONFIGURATION_H
+
+
+/****************************************************************************
+	    Parameters Useful for Any Code, USER or PRIVILEGED
+ ****************************************************************************/
+
+/*
+ *  Note:  Macros of the form XCHAL_HAVE_*** have a value of 1 if the option is
+ *  configured, and a value of 0 otherwise.  These macros are always defined.
+ */
+
+
+/*----------------------------------------------------------------------
+				ISA
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_BE			0	/* big-endian byte ordering */
+#define XCHAL_HAVE_WINDOWED		1	/* windowed registers option */
+#define XCHAL_NUM_AREGS			32	/* num of physical addr regs */
+#define XCHAL_NUM_AREGS_LOG2		5	/* log2(XCHAL_NUM_AREGS) */
+#define XCHAL_MAX_INSTRUCTION_SIZE	8	/* max instr bytes (3..8) */
+#define XCHAL_HAVE_DEBUG		1	/* debug option */
+#define XCHAL_HAVE_DENSITY		1	/* 16-bit instructions */
+#define XCHAL_HAVE_LOOPS		1	/* zero-overhead loops */
+#define XCHAL_LOOP_BUFFER_SIZE		0	/* zero-ov. loop instr buffer size */
+#define XCHAL_HAVE_NSA			1	/* NSA/NSAU instructions */
+#define XCHAL_HAVE_MINMAX		1	/* MIN/MAX instructions */
+#define XCHAL_HAVE_SEXT			1	/* SEXT instruction */
+#define XCHAL_HAVE_CLAMPS		1	/* CLAMPS instruction */
+#define XCHAL_HAVE_MUL16		1	/* MUL16S/MUL16U instructions */
+#define XCHAL_HAVE_MUL32		1	/* MULL instruction */
+#define XCHAL_HAVE_MUL32_HIGH		1	/* MULUH/MULSH instructions */
+#define XCHAL_HAVE_DIV32		1	/* QUOS/QUOU/REMS/REMU instructions */
+#define XCHAL_HAVE_L32R			1	/* L32R instruction */
+#define XCHAL_HAVE_ABSOLUTE_LITERALS	0	/* non-PC-rel (extended) L32R */
+#define XCHAL_HAVE_CONST16		0	/* CONST16 instruction */
+#define XCHAL_HAVE_ADDX			1	/* ADDX#/SUBX# instructions */
+#define XCHAL_HAVE_WIDE_BRANCHES	0	/* B*.W18 or B*.W15 instr's */
+#define XCHAL_HAVE_PREDICTED_BRANCHES	0	/* B[EQ/EQZ/NE/NEZ]T instr's */
+#define XCHAL_HAVE_CALL4AND12		1	/* (obsolete option) */
+#define XCHAL_HAVE_ABS			1	/* ABS instruction */
+/*#define XCHAL_HAVE_POPC		0*/	/* POPC instruction */
+/*#define XCHAL_HAVE_CRC		0*/	/* CRC instruction */
+#define XCHAL_HAVE_RELEASE_SYNC		1	/* L32AI/S32RI instructions */
+#define XCHAL_HAVE_S32C1I		1	/* S32C1I instruction */
+#define XCHAL_HAVE_SPECULATION		0	/* speculation */
+#define XCHAL_HAVE_FULL_RESET		1	/* all regs/state reset */
+#define XCHAL_NUM_CONTEXTS		1	/* */
+#define XCHAL_NUM_MISC_REGS		2	/* num of scratch regs (0..4) */
+#define XCHAL_HAVE_TAP_MASTER		0	/* JTAG TAP control instr's */
+#define XCHAL_HAVE_PRID			1	/* processor ID register */
+#define XCHAL_HAVE_EXTERN_REGS		1	/* WER/RER instructions */
+#define XCHAL_HAVE_MX			0	/* MX core (Tensilica internal) */
+#define XCHAL_HAVE_MP_INTERRUPTS	0	/* interrupt distributor port */
+#define XCHAL_HAVE_MP_RUNSTALL		0	/* core RunStall control port */
+#define XCHAL_HAVE_PSO			0	/* Power Shut-Off */
+#define XCHAL_HAVE_PSO_CDM		0	/* core/debug/mem pwr domains */
+#define XCHAL_HAVE_PSO_FULL_RETENTION	0	/* all regs preserved on PSO */
+#define XCHAL_HAVE_THREADPTR		1	/* THREADPTR register */
+#define XCHAL_HAVE_BOOLEANS		1	/* boolean registers */
+#define XCHAL_HAVE_CP			1	/* CPENABLE reg (coprocessor) */
+#define XCHAL_CP_MAXCFG			8	/* max allowed cp id plus one */
+#define XCHAL_HAVE_MAC16		1	/* MAC16 package */
+#define XCHAL_HAVE_VECTORFPU2005	0	/* vector floating-point pkg */
+#define XCHAL_HAVE_FP			0	/* single prec floating point */
+#define XCHAL_HAVE_FP_DIV		0	/* FP with DIV instructions */
+#define XCHAL_HAVE_FP_RECIP		0	/* FP with RECIP instructions */
+#define XCHAL_HAVE_FP_SQRT		0	/* FP with SQRT instructions */
+#define XCHAL_HAVE_FP_RSQRT		0	/* FP with RSQRT instructions */
+#define XCHAL_HAVE_DFP			0	/* double precision FP pkg */
+#define XCHAL_HAVE_DFP_DIV		0	/* DFP with DIV instructions */
+#define XCHAL_HAVE_DFP_RECIP		0	/* DFP with RECIP instructions*/
+#define XCHAL_HAVE_DFP_SQRT		0	/* DFP with SQRT instructions */
+#define XCHAL_HAVE_DFP_RSQRT		0	/* DFP with RSQRT instructions*/
+#define XCHAL_HAVE_DFP_accel		0	/* double precision FP acceleration pkg */
+#define XCHAL_HAVE_VECTRA1		0	/* Vectra I  pkg */
+#define XCHAL_HAVE_VECTRALX		0	/* Vectra LX pkg */
+#define XCHAL_HAVE_HIFIPRO		0	/* HiFiPro Audio Engine pkg */
+#define XCHAL_HAVE_HIFI3		1	/* HiFi3 Audio Engine pkg */
+#define XCHAL_HAVE_HIFI2		0	/* HiFi2 Audio Engine pkg */
+#define XCHAL_HAVE_HIFI2EP		0	/* HiFi2EP */
+#define XCHAL_HAVE_HIFI_MINI		0	
+#define XCHAL_HAVE_CONNXD2		0	/* ConnX D2 pkg */
+#define XCHAL_HAVE_BBE16		0	/* ConnX BBE16 pkg */
+#define XCHAL_HAVE_BBE16_RSQRT		0	/* BBE16 & vector recip sqrt */
+#define XCHAL_HAVE_BBE16_VECDIV		0	/* BBE16 & vector divide */
+#define XCHAL_HAVE_BBE16_DESPREAD	0	/* BBE16 & despread */
+#define XCHAL_HAVE_BBENEP		0	/* ConnX BBENEP pkgs */
+#define XCHAL_HAVE_BSP3			0	/* ConnX BSP3 pkg */
+#define XCHAL_HAVE_BSP3_TRANSPOSE	0	/* BSP3 & transpose32x32 */
+#define XCHAL_HAVE_SSP16		0	/* ConnX SSP16 pkg */
+#define XCHAL_HAVE_SSP16_VITERBI	0	/* SSP16 & viterbi */
+#define XCHAL_HAVE_TURBO16		0	/* ConnX Turbo16 pkg */
+#define XCHAL_HAVE_BBP16		0	/* ConnX BBP16 pkg */
+#define XCHAL_HAVE_FLIX3		0	/* basic 3-way FLIX option */
+
+
+/*----------------------------------------------------------------------
+				MISC
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_LOADSTORE_UNITS	1	/* load/store units */
+#define XCHAL_NUM_WRITEBUFFER_ENTRIES	8	/* size of write buffer */
+#define XCHAL_INST_FETCH_WIDTH		8	/* instr-fetch width in bytes */
+#define XCHAL_DATA_WIDTH		8	/* data width in bytes */
+#define XCHAL_DATA_PIPE_DELAY		1	/* d-side pipeline delay
+						   (1 = 5-stage, 2 = 7-stage) */
+/*  In T1050, applies to selected core load and store instructions (see ISA): */
+#define XCHAL_UNALIGNED_LOAD_EXCEPTION	1	/* unaligned loads cause exc. */
+#define XCHAL_UNALIGNED_STORE_EXCEPTION	1	/* unaligned stores cause exc.*/
+#define XCHAL_UNALIGNED_LOAD_HW		0	/* unaligned loads work in hw */
+#define XCHAL_UNALIGNED_STORE_HW	0	/* unaligned stores work in hw*/
+
+#define XCHAL_SW_VERSION		1000004	/* sw version of this header */
+
+#define XCHAL_CORE_ID			"test_kc705_hifi"	/* alphanum core name
+						   (CoreID) set in the Xtensa
+						   Processor Generator */
+
+#define XCHAL_BUILD_UNIQUE_ID		0x0004983D	/* 22-bit sw build ID */
+
+/*
+ *  These definitions describe the hardware targeted by this software.
+ */
+#define XCHAL_HW_CONFIGID0		0xC1B3FFFE	/* ConfigID hi 32 bits*/
+#define XCHAL_HW_CONFIGID1		0x1904983D	/* ConfigID lo 32 bits*/
+#define XCHAL_HW_VERSION_NAME		"LX5.0.4"	/* full version name */
+#define XCHAL_HW_VERSION_MAJOR		2500	/* major ver# of targeted hw */
+#define XCHAL_HW_VERSION_MINOR		4	/* minor ver# of targeted hw */
+#define XCHAL_HW_VERSION		250004	/* major*100+minor */
+#define XCHAL_HW_REL_LX5		1
+#define XCHAL_HW_REL_LX5_0		1
+#define XCHAL_HW_REL_LX5_0_4		1
+#define XCHAL_HW_CONFIGID_RELIABLE	1
+/*  If software targets a *range* of hardware versions, these are the bounds: */
+#define XCHAL_HW_MIN_VERSION_MAJOR	2500	/* major v of earliest tgt hw */
+#define XCHAL_HW_MIN_VERSION_MINOR	4	/* minor v of earliest tgt hw */
+#define XCHAL_HW_MIN_VERSION		250004	/* earliest targeted hw */
+#define XCHAL_HW_MAX_VERSION_MAJOR	2500	/* major v of latest tgt hw */
+#define XCHAL_HW_MAX_VERSION_MINOR	4	/* minor v of latest tgt hw */
+#define XCHAL_HW_MAX_VERSION		250004	/* latest targeted hw */
+
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_ICACHE_LINESIZE		32	/* I-cache line size in bytes */
+#define XCHAL_DCACHE_LINESIZE		32	/* D-cache line size in bytes */
+#define XCHAL_ICACHE_LINEWIDTH		5	/* log2(I line size in bytes) */
+#define XCHAL_DCACHE_LINEWIDTH		5	/* log2(D line size in bytes) */
+
+#define XCHAL_ICACHE_SIZE		16384	/* I-cache size in bytes or 0 */
+#define XCHAL_DCACHE_SIZE		16384	/* D-cache size in bytes or 0 */
+
+#define XCHAL_DCACHE_IS_WRITEBACK	1	/* writeback feature */
+#define XCHAL_DCACHE_IS_COHERENT	0	/* MP coherence feature */
+
+#define XCHAL_HAVE_PREFETCH		1	/* PREFCTL register */
+#define XCHAL_HAVE_PREFETCH_L1		0	/* prefetch to L1 dcache */
+#define XCHAL_PREFETCH_CASTOUT_LINES	1	/* dcache pref. castout bufsz */
+
+
+
+
+/****************************************************************************
+    Parameters Useful for PRIVILEGED (Supervisory or Non-Virtualized) Code
+ ****************************************************************************/
+
+
+#ifndef XTENSA_HAL_NON_PRIVILEGED_ONLY
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_PIF			1	/* any outbound PIF present */
+
+/*  If present, cache size in bytes == (ways * 2^(linewidth + setwidth)).  */
+
+/*  Number of cache sets in log2(lines per way):  */
+#define XCHAL_ICACHE_SETWIDTH		7
+#define XCHAL_DCACHE_SETWIDTH		7
+
+/*  Cache set associativity (number of ways):  */
+#define XCHAL_ICACHE_WAYS		4
+#define XCHAL_DCACHE_WAYS		4
+
+/*  Cache features:  */
+#define XCHAL_ICACHE_LINE_LOCKABLE	1
+#define XCHAL_DCACHE_LINE_LOCKABLE	1
+#define XCHAL_ICACHE_ECC_PARITY		0
+#define XCHAL_DCACHE_ECC_PARITY		0
+
+/*  Cache access size in bytes (affects operation of SICW instruction):  */
+#define XCHAL_ICACHE_ACCESS_SIZE	8
+#define XCHAL_DCACHE_ACCESS_SIZE	8
+
+#define XCHAL_DCACHE_BANKS		1	/* number of banks */
+
+/*  Number of encoded cache attr bits (see <xtensa/hal.h> for decoded bits):  */
+#define XCHAL_CA_BITS			4
+
+
+/*----------------------------------------------------------------------
+			INTERNAL I/D RAM/ROMs and XLMI
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_INSTROM		0	/* number of core instr. ROMs */
+#define XCHAL_NUM_INSTRAM		0	/* number of core instr. RAMs */
+#define XCHAL_NUM_DATAROM		0	/* number of core data ROMs */
+#define XCHAL_NUM_DATARAM		0	/* number of core data RAMs */
+#define XCHAL_NUM_URAM			0	/* number of core unified RAMs*/
+#define XCHAL_NUM_XLMI			0	/* number of core XLMI ports */
+
+#define XCHAL_HAVE_IMEM_LOADSTORE	1	/* can load/store to IROM/IRAM*/
+
+
+/*----------------------------------------------------------------------
+			INTERRUPTS and TIMERS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_INTERRUPTS		1	/* interrupt option */
+#define XCHAL_HAVE_HIGHPRI_INTERRUPTS	1	/* med/high-pri. interrupts */
+#define XCHAL_HAVE_NMI			1	/* non-maskable interrupt */
+#define XCHAL_HAVE_CCOUNT		1	/* CCOUNT reg. (timer option) */
+#define XCHAL_NUM_TIMERS		3	/* number of CCOMPAREn regs */
+#define XCHAL_NUM_INTERRUPTS		22	/* number of interrupts */
+#define XCHAL_NUM_INTERRUPTS_LOG2	5	/* ceil(log2(NUM_INTERRUPTS)) */
+#define XCHAL_NUM_EXTINTERRUPTS		16	/* num of external interrupts */
+#define XCHAL_NUM_INTLEVELS		6	/* number of interrupt levels
+						   (not including level zero) */
+#define XCHAL_EXCM_LEVEL		3	/* level masked by PS.EXCM */
+	/* (always 1 in XEA1; levels 2 .. EXCM_LEVEL are "medium priority") */
+
+/*  Masks of interrupts at each interrupt level:  */
+#define XCHAL_INTLEVEL1_MASK		0x001F00BF
+#define XCHAL_INTLEVEL2_MASK		0x00000140
+#define XCHAL_INTLEVEL3_MASK		0x00200E00
+#define XCHAL_INTLEVEL4_MASK		0x00009000
+#define XCHAL_INTLEVEL5_MASK		0x00002000
+#define XCHAL_INTLEVEL6_MASK		0x00000000
+#define XCHAL_INTLEVEL7_MASK		0x00004000
+
+/*  Masks of interrupts at each range 1..n of interrupt levels:  */
+#define XCHAL_INTLEVEL1_ANDBELOW_MASK	0x001F00BF
+#define XCHAL_INTLEVEL2_ANDBELOW_MASK	0x001F01FF
+#define XCHAL_INTLEVEL3_ANDBELOW_MASK	0x003F0FFF
+#define XCHAL_INTLEVEL4_ANDBELOW_MASK	0x003F9FFF
+#define XCHAL_INTLEVEL5_ANDBELOW_MASK	0x003FBFFF
+#define XCHAL_INTLEVEL6_ANDBELOW_MASK	0x003FBFFF
+#define XCHAL_INTLEVEL7_ANDBELOW_MASK	0x003FFFFF
+
+/*  Level of each interrupt:  */
+#define XCHAL_INT0_LEVEL		1
+#define XCHAL_INT1_LEVEL		1
+#define XCHAL_INT2_LEVEL		1
+#define XCHAL_INT3_LEVEL		1
+#define XCHAL_INT4_LEVEL		1
+#define XCHAL_INT5_LEVEL		1
+#define XCHAL_INT6_LEVEL		2
+#define XCHAL_INT7_LEVEL		1
+#define XCHAL_INT8_LEVEL		2
+#define XCHAL_INT9_LEVEL		3
+#define XCHAL_INT10_LEVEL		3
+#define XCHAL_INT11_LEVEL		3
+#define XCHAL_INT12_LEVEL		4
+#define XCHAL_INT13_LEVEL		5
+#define XCHAL_INT14_LEVEL		7
+#define XCHAL_INT15_LEVEL		4
+#define XCHAL_INT16_LEVEL		1
+#define XCHAL_INT17_LEVEL		1
+#define XCHAL_INT18_LEVEL		1
+#define XCHAL_INT19_LEVEL		1
+#define XCHAL_INT20_LEVEL		1
+#define XCHAL_INT21_LEVEL		3
+#define XCHAL_DEBUGLEVEL		6	/* debug interrupt level */
+#define XCHAL_HAVE_DEBUG_EXTERN_INT	1	/* OCD external db interrupt */
+#define XCHAL_NMILEVEL			7	/* NMI "level" (for use with
+						   EXCSAVE/EPS/EPC_n, RFI n) */
+
+/*  Type of each interrupt:  */
+#define XCHAL_INT0_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT1_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT2_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT3_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT4_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT5_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT6_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT7_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT8_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT9_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT10_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT11_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT12_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT13_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT14_TYPE 	XTHAL_INTTYPE_NMI
+#define XCHAL_INT15_TYPE 	XTHAL_INTTYPE_PROFILING
+#define XCHAL_INT16_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT17_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT18_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT19_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT20_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT21_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+
+/*  Masks of interrupts for each type of interrupt:  */
+#define XCHAL_INTTYPE_MASK_UNCONFIGURED	0xFFC00000
+#define XCHAL_INTTYPE_MASK_SOFTWARE	0x00000880
+#define XCHAL_INTTYPE_MASK_EXTERN_EDGE	0x003F0000
+#define XCHAL_INTTYPE_MASK_EXTERN_LEVEL	0x0000133F
+#define XCHAL_INTTYPE_MASK_TIMER	0x00002440
+#define XCHAL_INTTYPE_MASK_NMI		0x00004000
+#define XCHAL_INTTYPE_MASK_WRITE_ERROR	0x00000000
+#define XCHAL_INTTYPE_MASK_PROFILING	0x00008000
+
+/*  Interrupt numbers assigned to specific interrupt sources:  */
+#define XCHAL_TIMER0_INTERRUPT		6	/* CCOMPARE0 */
+#define XCHAL_TIMER1_INTERRUPT		10	/* CCOMPARE1 */
+#define XCHAL_TIMER2_INTERRUPT		13	/* CCOMPARE2 */
+#define XCHAL_TIMER3_INTERRUPT		XTHAL_TIMER_UNCONFIGURED
+#define XCHAL_NMI_INTERRUPT		14	/* non-maskable interrupt */
+#define XCHAL_PROFILING_INTERRUPT	15	/* profiling interrupt */
+
+/*  Interrupt numbers for levels at which only one interrupt is configured:  */
+#define XCHAL_INTLEVEL5_NUM		13
+#define XCHAL_INTLEVEL7_NUM		14
+/*  (There are many interrupts each at level(s) 1, 2, 3, 4.)  */
+
+
+/*
+ *  External interrupt mapping.
+ *  These macros describe how Xtensa processor interrupt numbers
+ *  (as numbered internally, eg. in INTERRUPT and INTENABLE registers)
+ *  map to external BInterrupt<n> pins, for those interrupts
+ *  configured as external (level-triggered, edge-triggered, or NMI).
+ *  See the Xtensa processor databook for more details.
+ */
+
+/*  Core interrupt numbers mapped to each EXTERNAL BInterrupt pin number:  */
+#define XCHAL_EXTINT0_NUM		0	/* (intlevel 1) */
+#define XCHAL_EXTINT1_NUM		1	/* (intlevel 1) */
+#define XCHAL_EXTINT2_NUM		2	/* (intlevel 1) */
+#define XCHAL_EXTINT3_NUM		3	/* (intlevel 1) */
+#define XCHAL_EXTINT4_NUM		4	/* (intlevel 1) */
+#define XCHAL_EXTINT5_NUM		5	/* (intlevel 1) */
+#define XCHAL_EXTINT6_NUM		8	/* (intlevel 2) */
+#define XCHAL_EXTINT7_NUM		9	/* (intlevel 3) */
+#define XCHAL_EXTINT8_NUM		12	/* (intlevel 4) */
+#define XCHAL_EXTINT9_NUM		14	/* (intlevel 7) */
+#define XCHAL_EXTINT10_NUM		16	/* (intlevel 1) */
+#define XCHAL_EXTINT11_NUM		17	/* (intlevel 1) */
+#define XCHAL_EXTINT12_NUM		18	/* (intlevel 1) */
+#define XCHAL_EXTINT13_NUM		19	/* (intlevel 1) */
+#define XCHAL_EXTINT14_NUM		20	/* (intlevel 1) */
+#define XCHAL_EXTINT15_NUM		21	/* (intlevel 3) */
+/*  EXTERNAL BInterrupt pin numbers mapped to each core interrupt number:  */
+#define XCHAL_INT0_EXTNUM		0	/* (intlevel 1) */
+#define XCHAL_INT1_EXTNUM		1	/* (intlevel 1) */
+#define XCHAL_INT2_EXTNUM		2	/* (intlevel 1) */
+#define XCHAL_INT3_EXTNUM		3	/* (intlevel 1) */
+#define XCHAL_INT4_EXTNUM		4	/* (intlevel 1) */
+#define XCHAL_INT5_EXTNUM		5	/* (intlevel 1) */
+#define XCHAL_INT8_EXTNUM		6	/* (intlevel 2) */
+#define XCHAL_INT9_EXTNUM		7	/* (intlevel 3) */
+#define XCHAL_INT12_EXTNUM		8	/* (intlevel 4) */
+#define XCHAL_INT14_EXTNUM		9	/* (intlevel 7) */
+#define XCHAL_INT16_EXTNUM		10	/* (intlevel 1) */
+#define XCHAL_INT17_EXTNUM		11	/* (intlevel 1) */
+#define XCHAL_INT18_EXTNUM		12	/* (intlevel 1) */
+#define XCHAL_INT19_EXTNUM		13	/* (intlevel 1) */
+#define XCHAL_INT20_EXTNUM		14	/* (intlevel 1) */
+#define XCHAL_INT21_EXTNUM		15	/* (intlevel 3) */
+
+
+/*----------------------------------------------------------------------
+			EXCEPTIONS and VECTORS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_XEA_VERSION		2	/* Xtensa Exception Architecture
+						   number: 1 == XEA1 (old)
+							   2 == XEA2 (new)
+							   0 == XEAX (extern) or TX */
+#define XCHAL_HAVE_XEA1			0	/* Exception Architecture 1 */
+#define XCHAL_HAVE_XEA2			1	/* Exception Architecture 2 */
+#define XCHAL_HAVE_XEAX			0	/* External Exception Arch. */
+#define XCHAL_HAVE_EXCEPTIONS		1	/* exception option */
+#define XCHAL_HAVE_HALT			0	/* halt architecture option */
+#define XCHAL_HAVE_BOOTLOADER		0	/* boot loader (for TX) */
+#define XCHAL_HAVE_MEM_ECC_PARITY	0	/* local memory ECC/parity */
+#define XCHAL_HAVE_VECTOR_SELECT	1	/* relocatable vectors */
+#define XCHAL_HAVE_VECBASE		1	/* relocatable vectors */
+#define XCHAL_VECBASE_RESET_VADDR	0x00002000  /* VECBASE reset value */
+#define XCHAL_VECBASE_RESET_PADDR	0x00002000
+#define XCHAL_RESET_VECBASE_OVERLAP	0
+
+#define XCHAL_RESET_VECTOR0_VADDR	0xFE000000
+#define XCHAL_RESET_VECTOR0_PADDR	0xFE000000
+#define XCHAL_RESET_VECTOR1_VADDR	0x00001000
+#define XCHAL_RESET_VECTOR1_PADDR	0x00001000
+#define XCHAL_RESET_VECTOR_VADDR	0xFE000000
+#define XCHAL_RESET_VECTOR_PADDR	0xFE000000
+#define XCHAL_USER_VECOFS		0x00000340
+#define XCHAL_USER_VECTOR_VADDR		0x00002340
+#define XCHAL_USER_VECTOR_PADDR		0x00002340
+#define XCHAL_KERNEL_VECOFS		0x00000300
+#define XCHAL_KERNEL_VECTOR_VADDR	0x00002300
+#define XCHAL_KERNEL_VECTOR_PADDR	0x00002300
+#define XCHAL_DOUBLEEXC_VECOFS		0x000003C0
+#define XCHAL_DOUBLEEXC_VECTOR_VADDR	0x000023C0
+#define XCHAL_DOUBLEEXC_VECTOR_PADDR	0x000023C0
+#define XCHAL_WINDOW_OF4_VECOFS		0x00000000
+#define XCHAL_WINDOW_UF4_VECOFS		0x00000040
+#define XCHAL_WINDOW_OF8_VECOFS		0x00000080
+#define XCHAL_WINDOW_UF8_VECOFS		0x000000C0
+#define XCHAL_WINDOW_OF12_VECOFS	0x00000100
+#define XCHAL_WINDOW_UF12_VECOFS	0x00000140
+#define XCHAL_WINDOW_VECTORS_VADDR	0x00002000
+#define XCHAL_WINDOW_VECTORS_PADDR	0x00002000
+#define XCHAL_INTLEVEL2_VECOFS		0x00000180
+#define XCHAL_INTLEVEL2_VECTOR_VADDR	0x00002180
+#define XCHAL_INTLEVEL2_VECTOR_PADDR	0x00002180
+#define XCHAL_INTLEVEL3_VECOFS		0x000001C0
+#define XCHAL_INTLEVEL3_VECTOR_VADDR	0x000021C0
+#define XCHAL_INTLEVEL3_VECTOR_PADDR	0x000021C0
+#define XCHAL_INTLEVEL4_VECOFS		0x00000200
+#define XCHAL_INTLEVEL4_VECTOR_VADDR	0x00002200
+#define XCHAL_INTLEVEL4_VECTOR_PADDR	0x00002200
+#define XCHAL_INTLEVEL5_VECOFS		0x00000240
+#define XCHAL_INTLEVEL5_VECTOR_VADDR	0x00002240
+#define XCHAL_INTLEVEL5_VECTOR_PADDR	0x00002240
+#define XCHAL_INTLEVEL6_VECOFS		0x00000280
+#define XCHAL_INTLEVEL6_VECTOR_VADDR	0x00002280
+#define XCHAL_INTLEVEL6_VECTOR_PADDR	0x00002280
+#define XCHAL_DEBUG_VECOFS		XCHAL_INTLEVEL6_VECOFS
+#define XCHAL_DEBUG_VECTOR_VADDR	XCHAL_INTLEVEL6_VECTOR_VADDR
+#define XCHAL_DEBUG_VECTOR_PADDR	XCHAL_INTLEVEL6_VECTOR_PADDR
+#define XCHAL_NMI_VECOFS		0x000002C0
+#define XCHAL_NMI_VECTOR_VADDR		0x000022C0
+#define XCHAL_NMI_VECTOR_PADDR		0x000022C0
+#define XCHAL_INTLEVEL7_VECOFS		XCHAL_NMI_VECOFS
+#define XCHAL_INTLEVEL7_VECTOR_VADDR	XCHAL_NMI_VECTOR_VADDR
+#define XCHAL_INTLEVEL7_VECTOR_PADDR	XCHAL_NMI_VECTOR_PADDR
+
+
+/*----------------------------------------------------------------------
+				DEBUG MODULE
+  ----------------------------------------------------------------------*/
+
+/*  Misc  */
+#define XCHAL_HAVE_DEBUG_ERI		1	/* ERI to debug module */
+#define XCHAL_HAVE_DEBUG_APB		0	/* APB to debug module */
+#define XCHAL_HAVE_DEBUG_JTAG		1	/* JTAG to debug module */
+
+/*  On-Chip Debug (OCD)  */
+#define XCHAL_HAVE_OCD			1	/* OnChipDebug option */
+#define XCHAL_NUM_IBREAK		2	/* number of IBREAKn regs */
+#define XCHAL_NUM_DBREAK		2	/* number of DBREAKn regs */
+#define XCHAL_HAVE_OCD_DIR_ARRAY	0	/* faster OCD option (to LX4) */
+#define XCHAL_HAVE_OCD_LS32DDR		1	/* L32DDR/S32DDR (faster OCD) */
+
+/*  TRAX (in core)  */
+#define XCHAL_HAVE_TRAX			1	/* TRAX in debug module */
+#define XCHAL_TRAX_MEM_SIZE		262144	/* TRAX memory size in bytes */
+#define XCHAL_TRAX_MEM_SHAREABLE	1	/* start/end regs; ready sig. */
+#define XCHAL_TRAX_ATB_WIDTH		0	/* ATB width (bits), 0=no ATB */
+#define XCHAL_TRAX_TIME_WIDTH		0	/* timestamp bitwidth, 0=none */
+
+/*  Perf counters  */
+#define XCHAL_NUM_PERF_COUNTERS		8	/* performance counters */
+
+
+/*----------------------------------------------------------------------
+				MMU
+  ----------------------------------------------------------------------*/
+
+/*  See core-matmap.h header file for more details.  */
+
+#define XCHAL_HAVE_TLBS			1	/* inverse of HAVE_CACHEATTR */
+#define XCHAL_HAVE_SPANNING_WAY		1	/* one way maps I+D 4GB vaddr */
+#define XCHAL_SPANNING_WAY		6	/* TLB spanning way number */
+#define XCHAL_HAVE_IDENTITY_MAP		0	/* vaddr == paddr always */
+#define XCHAL_HAVE_CACHEATTR		0	/* CACHEATTR register present */
+#define XCHAL_HAVE_MIMIC_CACHEATTR	0	/* region protection */
+#define XCHAL_HAVE_XLT_CACHEATTR	0	/* region prot. w/translation */
+#define XCHAL_HAVE_PTP_MMU		1	/* full MMU (with page table
+						   [autorefill] and protection)
+						   usable for an MMU-based OS */
+/*  If none of the above last 4 are set, it's a custom TLB configuration.  */
+#define XCHAL_ITLB_ARF_ENTRIES_LOG2	2	/* log2(autorefill way size) */
+#define XCHAL_DTLB_ARF_ENTRIES_LOG2	2	/* log2(autorefill way size) */
+
+#define XCHAL_MMU_ASID_BITS		8	/* number of bits in ASIDs */
+#define XCHAL_MMU_RINGS			4	/* number of rings (1..4) */
+#define XCHAL_MMU_RING_BITS		2	/* num of bits in RING field */
+
+#endif /* !XTENSA_HAL_NON_PRIVILEGED_ONLY */
+
+
+#endif /* _XTENSA_CORE_CONFIGURATION_H */
diff --git a/arch/xtensa/variants/test_kc705_hifi/include/variant/tie-asm.h b/arch/xtensa/variants/test_kc705_hifi/include/variant/tie-asm.h
new file mode 100644
index 000000000..378163c0a
--- /dev/null
+++ b/arch/xtensa/variants/test_kc705_hifi/include/variant/tie-asm.h
@@ -0,0 +1,328 @@
+/* 
+ * tie-asm.h -- compile-time HAL assembler definitions dependent on CORE & TIE
+ *
+ *  NOTE:  This header file is not meant to be included directly.
+ */
+
+/* This header file contains assembly-language definitions (assembly
+   macros, etc.) for this specific Xtensa processor's TIE extensions
+   and options.  It is customized to this Xtensa processor configuration.
+
+   Copyright (c) 1999-2014 Tensilica Inc.
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be included
+   in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _XTENSA_CORE_TIE_ASM_H
+#define _XTENSA_CORE_TIE_ASM_H
+
+/*  Selection parameter values for save-area save/restore macros:  */
+/*  Option vs. TIE:  */
+#define XTHAL_SAS_TIE	0x0001	/* custom extension or coprocessor */
+#define XTHAL_SAS_OPT	0x0002	/* optional (and not a coprocessor) */
+#define XTHAL_SAS_ANYOT	0x0003	/* both of the above */
+/*  Whether used automatically by compiler:  */
+#define XTHAL_SAS_NOCC	0x0004	/* not used by compiler w/o special opts/code */
+#define XTHAL_SAS_CC	0x0008	/* used by compiler without special opts/code */
+#define XTHAL_SAS_ANYCC	0x000C	/* both of the above */
+/*  ABI handling across function calls:  */
+#define XTHAL_SAS_CALR	0x0010	/* caller-saved */
+#define XTHAL_SAS_CALE	0x0020	/* callee-saved */
+#define XTHAL_SAS_GLOB	0x0040	/* global across function calls (in thread) */
+#define XTHAL_SAS_ANYABI 0x0070	/* all of the above three */
+/*  Misc  */
+#define XTHAL_SAS_ALL	0xFFFF	/* include all default NCP contents */
+#define XTHAL_SAS3(optie,ccuse,abi)	( ((optie) & XTHAL_SAS_ANYOT)  \
+					| ((ccuse) & XTHAL_SAS_ANYCC)  \
+					| ((abi)   & XTHAL_SAS_ANYABI) )
+
+
+
+    /*
+     *  Macro to save all non-coprocessor (extra) custom TIE and optional state
+     *  (not including zero-overhead loop registers).
+     *  Required parameters:
+     *      ptr		Save area pointer address register (clobbered)
+     *			(register must contain a 4 byte aligned address).
+     *      at1..at4	Four temporary address registers (first XCHAL_NCP_NUM_ATMPS
+     *			registers are clobbered, the remaining are unused).
+     *  Optional parameters:
+     *      continue	If macro invoked as part of a larger store sequence, set to 1
+     *			if this is not the first in the sequence.  Defaults to 0.
+     *      ofs		Offset from start of larger sequence (from value of first ptr
+     *			in sequence) at which to store.  Defaults to next available space
+     *			(or 0 if <continue> is 0).
+     *      select	Select what category(ies) of registers to store, as a bitmask
+     *			(see XTHAL_SAS_xxx constants).  Defaults to all registers.
+     *      alloc	Select what category(ies) of registers to allocate; if any
+     *			category is selected here that is not in <select>, space for
+     *			the corresponding registers is skipped without doing any store.
+     */
+    .macro xchal_ncp_store  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
+	xchal_sa_start	\continue, \ofs
+	// Optional global register used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1020, 4, 4
+	rur.THREADPTR	\at1		// threadptr option
+	s32i	\at1, \ptr, .Lxchal_ofs_+0
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1020, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	// Optional caller-saved registers used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	rsr.ACCLO	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+0
+	rsr.ACCHI	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.endif
+	// Optional caller-saved registers not used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1000, 4, 4
+	rsr.M0	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+0
+	rsr.M1	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+4
+	rsr.M2	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+8
+	rsr.M3	\at1		// MAC16 option
+	s32i	\at1, \ptr, .Lxchal_ofs_+12
+	rsr.BR	\at1		// boolean option
+	s32i	\at1, \ptr, .Lxchal_ofs_+16
+	rsr.SCOMPARE1	\at1		// conditional store option
+	s32i	\at1, \ptr, .Lxchal_ofs_+20
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 24
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1000, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 24
+	.endif
+    .endm	// xchal_ncp_store
+
+    /*
+     *  Macro to restore all non-coprocessor (extra) custom TIE and optional state
+     *  (not including zero-overhead loop registers).
+     *  Required parameters:
+     *      ptr		Save area pointer address register (clobbered)
+     *			(register must contain a 4 byte aligned address).
+     *      at1..at4	Four temporary address registers (first XCHAL_NCP_NUM_ATMPS
+     *			registers are clobbered, the remaining are unused).
+     *  Optional parameters:
+     *      continue	If macro invoked as part of a larger load sequence, set to 1
+     *			if this is not the first in the sequence.  Defaults to 0.
+     *      ofs		Offset from start of larger sequence (from value of first ptr
+     *			in sequence) at which to load.  Defaults to next available space
+     *			(or 0 if <continue> is 0).
+     *      select	Select what category(ies) of registers to load, as a bitmask
+     *			(see XTHAL_SAS_xxx constants).  Defaults to all registers.
+     *      alloc	Select what category(ies) of registers to allocate; if any
+     *			category is selected here that is not in <select>, space for
+     *			the corresponding registers is skipped without doing any load.
+     */
+    .macro xchal_ncp_load  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
+	xchal_sa_start	\continue, \ofs
+	// Optional global register used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1020, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_+0
+	wur.THREADPTR	\at1		// threadptr option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1020, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	// Optional caller-saved registers used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_+0
+	wsr.ACCLO	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+4
+	wsr.ACCHI	\at1		// MAC16 option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1016, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 8
+	.endif
+	// Optional caller-saved registers not used by default by the compiler:
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 1000, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_+0
+	wsr.M0	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+4
+	wsr.M1	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+8
+	wsr.M2	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+12
+	wsr.M3	\at1		// MAC16 option
+	l32i	\at1, \ptr, .Lxchal_ofs_+16
+	wsr.BR	\at1		// boolean option
+	l32i	\at1, \ptr, .Lxchal_ofs_+20
+	wsr.SCOMPARE1	\at1		// conditional store option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 24
+	.elseif ((XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 1000, 4, 4
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 24
+	.endif
+    .endm	// xchal_ncp_load
+
+
+#define XCHAL_NCP_NUM_ATMPS	1
+
+
+
+
+    /*
+     *  Macro to save the state of TIE coprocessor AudioEngineLX.
+     *  Required parameters:
+     *      ptr		Save area pointer address register (clobbered)
+     *			(register must contain a 8 byte aligned address).
+     *      at1..at4	Four temporary address registers (first XCHAL_CP1_NUM_ATMPS
+     *			registers are clobbered, the remaining are unused).
+     *  Optional parameters are the same as for xchal_ncp_store.
+     */
+#define xchal_cp_AudioEngineLX_store	xchal_cp1_store
+    .macro	xchal_cp1_store  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
+	xchal_sa_start \continue, \ofs
+	// Custom caller-saved registers not used by default by the compiler:
+	.ifeq (XTHAL_SAS_TIE | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 0, 8, 8
+	rur.AE_OVF_SAR	\at1		// ureg 240
+	s32i	\at1, \ptr, .Lxchal_ofs_+0
+	rur.AE_BITHEAD	\at1		// ureg 241
+	s32i	\at1, \ptr, .Lxchal_ofs_+4
+	rur.AE_TS_FTS_BU_BP	\at1		// ureg 242
+	s32i	\at1, \ptr, .Lxchal_ofs_+8
+	rur.AE_CW_SD_NO	\at1		// ureg 243
+	s32i	\at1, \ptr, .Lxchal_ofs_+12
+	rur.AE_CBEGIN0	\at1		// ureg 246
+	s32i	\at1, \ptr, .Lxchal_ofs_+16
+	rur.AE_CEND0	\at1		// ureg 247
+	s32i	\at1, \ptr, .Lxchal_ofs_+20
+	AE_S64.I	aed0, \ptr, .Lxchal_ofs_+24
+	AE_S64.I	aed1, \ptr, .Lxchal_ofs_+32
+	AE_S64.I	aed2, \ptr, .Lxchal_ofs_+40
+	AE_S64.I	aed3, \ptr, .Lxchal_ofs_+48
+	AE_S64.I	aed4, \ptr, .Lxchal_ofs_+56
+	addi	\ptr, \ptr, 64
+	AE_S64.I	aed5, \ptr, .Lxchal_ofs_+0
+	AE_S64.I	aed6, \ptr, .Lxchal_ofs_+8
+	AE_S64.I	aed7, \ptr, .Lxchal_ofs_+16
+	AE_S64.I	aed8, \ptr, .Lxchal_ofs_+24
+	AE_S64.I	aed9, \ptr, .Lxchal_ofs_+32
+	AE_S64.I	aed10, \ptr, .Lxchal_ofs_+40
+	AE_S64.I	aed11, \ptr, .Lxchal_ofs_+48
+	AE_S64.I	aed12, \ptr, .Lxchal_ofs_+56
+	addi	\ptr, \ptr, 64
+	AE_S64.I	aed13, \ptr, .Lxchal_ofs_+0
+	AE_S64.I	aed14, \ptr, .Lxchal_ofs_+8
+	AE_S64.I	aed15, \ptr, .Lxchal_ofs_+16
+	AE_SALIGN64.I	u0, \ptr, .Lxchal_ofs_+24
+	AE_SALIGN64.I	u1, \ptr, .Lxchal_ofs_+32
+	AE_SALIGN64.I	u2, \ptr, .Lxchal_ofs_+40
+	AE_SALIGN64.I	u3, \ptr, .Lxchal_ofs_+48
+	.set	.Lxchal_pofs_, .Lxchal_pofs_ + 128
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 56
+	.elseif ((XTHAL_SAS_TIE | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 0, 8, 8
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 184
+	.endif
+    .endm	// xchal_cp1_store
+
+    /*
+     *  Macro to restore the state of TIE coprocessor AudioEngineLX.
+     *  Required parameters:
+     *      ptr		Save area pointer address register (clobbered)
+     *			(register must contain a 8 byte aligned address).
+     *      at1..at4	Four temporary address registers (first XCHAL_CP1_NUM_ATMPS
+     *			registers are clobbered, the remaining are unused).
+     *  Optional parameters are the same as for xchal_ncp_load.
+     */
+#define xchal_cp_AudioEngineLX_load	xchal_cp1_load
+    .macro	xchal_cp1_load  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
+	xchal_sa_start \continue, \ofs
+	// Custom caller-saved registers not used by default by the compiler:
+	.ifeq (XTHAL_SAS_TIE | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
+	xchal_sa_align	\ptr, 0, 0, 8, 8
+	l32i	\at1, \ptr, .Lxchal_ofs_+0
+	wur.AE_OVF_SAR	\at1		// ureg 240
+	l32i	\at1, \ptr, .Lxchal_ofs_+4
+	wur.AE_BITHEAD	\at1		// ureg 241
+	l32i	\at1, \ptr, .Lxchal_ofs_+8
+	wur.AE_TS_FTS_BU_BP	\at1		// ureg 242
+	l32i	\at1, \ptr, .Lxchal_ofs_+12
+	wur.AE_CW_SD_NO	\at1		// ureg 243
+	l32i	\at1, \ptr, .Lxchal_ofs_+16
+	wur.AE_CBEGIN0	\at1		// ureg 246
+	l32i	\at1, \ptr, .Lxchal_ofs_+20
+	wur.AE_CEND0	\at1		// ureg 247
+	AE_L64.I	aed0, \ptr, .Lxchal_ofs_+24
+	AE_L64.I	aed1, \ptr, .Lxchal_ofs_+32
+	AE_L64.I	aed2, \ptr, .Lxchal_ofs_+40
+	AE_L64.I	aed3, \ptr, .Lxchal_ofs_+48
+	AE_L64.I	aed4, \ptr, .Lxchal_ofs_+56
+	addi	\ptr, \ptr, 64
+	AE_L64.I	aed5, \ptr, .Lxchal_ofs_+0
+	AE_L64.I	aed6, \ptr, .Lxchal_ofs_+8
+	AE_L64.I	aed7, \ptr, .Lxchal_ofs_+16
+	AE_L64.I	aed8, \ptr, .Lxchal_ofs_+24
+	AE_L64.I	aed9, \ptr, .Lxchal_ofs_+32
+	AE_L64.I	aed10, \ptr, .Lxchal_ofs_+40
+	AE_L64.I	aed11, \ptr, .Lxchal_ofs_+48
+	AE_L64.I	aed12, \ptr, .Lxchal_ofs_+56
+	addi	\ptr, \ptr, 64
+	AE_L64.I	aed13, \ptr, .Lxchal_ofs_+0
+	AE_L64.I	aed14, \ptr, .Lxchal_ofs_+8
+	AE_L64.I	aed15, \ptr, .Lxchal_ofs_+16
+	AE_LALIGN64.I	u0, \ptr, .Lxchal_ofs_+24
+	AE_LALIGN64.I	u1, \ptr, .Lxchal_ofs_+32
+	AE_LALIGN64.I	u2, \ptr, .Lxchal_ofs_+40
+	AE_LALIGN64.I	u3, \ptr, .Lxchal_ofs_+48
+	.set	.Lxchal_pofs_, .Lxchal_pofs_ + 128
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 56
+	.elseif ((XTHAL_SAS_TIE | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
+	xchal_sa_align	\ptr, 0, 0, 8, 8
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 184
+	.endif
+    .endm	// xchal_cp1_load
+
+#define XCHAL_CP1_NUM_ATMPS	1
+#define XCHAL_SA_NUM_ATMPS	1
+
+	/*  Empty macros for unconfigured coprocessors:  */
+	.macro xchal_cp0_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp0_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp2_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp2_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp3_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp3_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp4_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp4_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp5_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp5_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp6_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp6_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp7_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp7_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+
+#endif /*_XTENSA_CORE_TIE_ASM_H*/
diff --git a/arch/xtensa/variants/test_kc705_hifi/include/variant/tie.h b/arch/xtensa/variants/test_kc705_hifi/include/variant/tie.h
new file mode 100644
index 000000000..e39fea643
--- /dev/null
+++ b/arch/xtensa/variants/test_kc705_hifi/include/variant/tie.h
@@ -0,0 +1,189 @@
+/* 
+ * tie.h -- compile-time HAL definitions dependent on CORE & TIE configuration
+ *
+ *  NOTE:  This header file is not meant to be included directly.
+ */
+
+/* This header file describes this specific Xtensa processor's TIE extensions
+   that extend basic Xtensa core functionality.  It is customized to this
+   Xtensa processor configuration.
+
+   Copyright (c) 1999-2014 Tensilica Inc.
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be included
+   in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifndef _XTENSA_CORE_TIE_H
+#define _XTENSA_CORE_TIE_H
+
+#define XCHAL_CP_NUM			2	/* number of coprocessors */
+#define XCHAL_CP_MAX			8	/* max CP ID + 1 (0 if none) */
+#define XCHAL_CP_MASK			0x82	/* bitmask of all CPs by ID */
+#define XCHAL_CP_PORT_MASK		0x80	/* bitmask of only port CPs */
+
+/*  Basic parameters of each coprocessor:  */
+#define XCHAL_CP1_NAME			"AudioEngineLX"
+#define XCHAL_CP1_IDENT			AudioEngineLX
+#define XCHAL_CP1_SA_SIZE		184	/* size of state save area */
+#define XCHAL_CP1_SA_ALIGN		8	/* min alignment of save area */
+#define XCHAL_CP_ID_AUDIOENGINELX	1	/* coprocessor ID (0..7) */
+#define XCHAL_CP7_NAME			"XTIOP"
+#define XCHAL_CP7_IDENT			XTIOP
+#define XCHAL_CP7_SA_SIZE		0	/* size of state save area */
+#define XCHAL_CP7_SA_ALIGN		1	/* min alignment of save area */
+#define XCHAL_CP_ID_XTIOP		7	/* coprocessor ID (0..7) */
+
+/*  Filler info for unassigned coprocessors, to simplify arrays etc:  */
+#define XCHAL_CP0_SA_SIZE		0
+#define XCHAL_CP0_SA_ALIGN		1
+#define XCHAL_CP2_SA_SIZE		0
+#define XCHAL_CP2_SA_ALIGN		1
+#define XCHAL_CP3_SA_SIZE		0
+#define XCHAL_CP3_SA_ALIGN		1
+#define XCHAL_CP4_SA_SIZE		0
+#define XCHAL_CP4_SA_ALIGN		1
+#define XCHAL_CP5_SA_SIZE		0
+#define XCHAL_CP5_SA_ALIGN		1
+#define XCHAL_CP6_SA_SIZE		0
+#define XCHAL_CP6_SA_ALIGN		1
+
+/*  Save area for non-coprocessor optional and custom (TIE) state:  */
+#define XCHAL_NCP_SA_SIZE		36
+#define XCHAL_NCP_SA_ALIGN		4
+
+/*  Total save area for optional and custom state (NCP + CPn):  */
+#define XCHAL_TOTAL_SA_SIZE		240	/* with 16-byte align padding */
+#define XCHAL_TOTAL_SA_ALIGN		8	/* actual minimum alignment */
+
+/*
+ * Detailed contents of save areas.
+ * NOTE:  caller must define the XCHAL_SA_REG macro (not defined here)
+ * before expanding the XCHAL_xxx_SA_LIST() macros.
+ *
+ * XCHAL_SA_REG(s,ccused,abikind,kind,opt,name,galign,align,asize,
+ *		dbnum,base,regnum,bitsz,gapsz,reset,x...)
+ *
+ *	s = passed from XCHAL_*_LIST(s), eg. to select how to expand
+ *	ccused = set if used by compiler without special options or code
+ *	abikind = 0 (caller-saved), 1 (callee-saved), or 2 (thread-global)
+ *	kind = 0 (special reg), 1 (TIE user reg), or 2 (TIE regfile reg)
+ *	opt = 0 (custom TIE extension or coprocessor), or 1 (optional reg)
+ *	name = lowercase reg name (no quotes)
+ *	galign = group byte alignment (power of 2) (galign >= align)
+ *	align = register byte alignment (power of 2)
+ *	asize = allocated size in bytes (asize*8 == bitsz + gapsz + padsz)
+ *	  (not including any pad bytes required to galign this or next reg)
+ *	dbnum = unique target number f/debug (see <xtensa-libdb-macros.h>)
+ *	base = reg shortname w/o index (or sr=special, ur=TIE user reg)
+ *	regnum = reg index in regfile, or special/TIE-user reg number
+ *	bitsz = number of significant bits (regfile width, or ur/sr mask bits)
+ *	gapsz = intervening bits, if bitsz bits not stored contiguously
+ *	(padsz = pad bits at end [TIE regfile] or at msbits [ur,sr] of asize)
+ *	reset = register reset value (or 0 if undefined at reset)
+ *	x = reserved for future use (0 until then)
+ *
+ *  To filter out certain registers, e.g. to expand only the non-global
+ *  registers used by the compiler, you can do something like this:
+ *
+ *  #define XCHAL_SA_REG(s,ccused,p...)	SELCC##ccused(p)
+ *  #define SELCC0(p...)
+ *  #define SELCC1(abikind,p...)	SELAK##abikind(p)
+ *  #define SELAK0(p...)		REG(p)
+ *  #define SELAK1(p...)		REG(p)
+ *  #define SELAK2(p...)
+ *  #define REG(kind,tie,name,galn,aln,asz,csz,dbnum,base,rnum,bsz,rst,x...) \
+ *		...what you want to expand...
+ */
+
+#define XCHAL_NCP_SA_NUM	9
+#define XCHAL_NCP_SA_LIST(s)	\
+ XCHAL_SA_REG(s,1,2,1,1,      threadptr, 4, 4, 4,0x03E7,  ur,231, 32,0,0,0) \
+ XCHAL_SA_REG(s,1,0,0,1,          acclo, 4, 4, 4,0x0210,  sr,16 , 32,0,0,0) \
+ XCHAL_SA_REG(s,1,0,0,1,          acchi, 4, 4, 4,0x0211,  sr,17 ,  8,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m0, 4, 4, 4,0x0220,  sr,32 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m1, 4, 4, 4,0x0221,  sr,33 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m2, 4, 4, 4,0x0222,  sr,34 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             m3, 4, 4, 4,0x0223,  sr,35 , 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,             br, 4, 4, 4,0x0204,  sr,4  , 16,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,      scompare1, 4, 4, 4,0x020C,  sr,12 , 32,0,0,0)
+
+#define XCHAL_CP0_SA_NUM	0
+#define XCHAL_CP0_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP1_SA_NUM	26
+#define XCHAL_CP1_SA_LIST(s)	\
+ XCHAL_SA_REG(s,0,0,1,0,     ae_ovf_sar, 8, 4, 4,0x03F0,  ur,240,  8,0,0,0) \
+ XCHAL_SA_REG(s,0,0,1,0,     ae_bithead, 4, 4, 4,0x03F1,  ur,241, 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,1,0,ae_ts_fts_bu_bp, 4, 4, 4,0x03F2,  ur,242, 16,0,0,0) \
+ XCHAL_SA_REG(s,0,0,1,0,    ae_cw_sd_no, 4, 4, 4,0x03F3,  ur,243, 29,0,0,0) \
+ XCHAL_SA_REG(s,0,0,1,0,     ae_cbegin0, 4, 4, 4,0x03F6,  ur,246, 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,1,0,       ae_cend0, 4, 4, 4,0x03F7,  ur,247, 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aed0, 8, 8, 8,0x1010, aed,0  , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aed1, 8, 8, 8,0x1011, aed,1  , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aed2, 8, 8, 8,0x1012, aed,2  , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aed3, 8, 8, 8,0x1013, aed,3  , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aed4, 8, 8, 8,0x1014, aed,4  , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aed5, 8, 8, 8,0x1015, aed,5  , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aed6, 8, 8, 8,0x1016, aed,6  , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aed7, 8, 8, 8,0x1017, aed,7  , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aed8, 8, 8, 8,0x1018, aed,8  , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aed9, 8, 8, 8,0x1019, aed,9  , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,          aed10, 8, 8, 8,0x101A, aed,10 , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,          aed11, 8, 8, 8,0x101B, aed,11 , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,          aed12, 8, 8, 8,0x101C, aed,12 , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,          aed13, 8, 8, 8,0x101D, aed,13 , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,          aed14, 8, 8, 8,0x101E, aed,14 , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,          aed15, 8, 8, 8,0x101F, aed,15 , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,             u0, 8, 8, 8,0x1020,   u,0  , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,             u1, 8, 8, 8,0x1021,   u,1  , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,             u2, 8, 8, 8,0x1022,   u,2  , 64,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,             u3, 8, 8, 8,0x1023,   u,3  , 64,0,0,0)
+
+#define XCHAL_CP2_SA_NUM	0
+#define XCHAL_CP2_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP3_SA_NUM	0
+#define XCHAL_CP3_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP4_SA_NUM	0
+#define XCHAL_CP4_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP5_SA_NUM	0
+#define XCHAL_CP5_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP6_SA_NUM	0
+#define XCHAL_CP6_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP7_SA_NUM	0
+#define XCHAL_CP7_SA_LIST(s)	/* empty */
+
+/* Byte length of instruction from its first nibble (op0 field), per FLIX.  */
+#define XCHAL_OP0_FORMAT_LENGTHS	3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8
+/* Byte length of instruction from its first byte, per FLIX.  */
+#define XCHAL_BYTE0_FORMAT_LENGTHS	\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8,\
+	3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8
+
+#endif /*_XTENSA_CORE_TIE_H*/
diff --git a/arch/xtensa/variants/test_mmuhifi_c3/include/variant/core.h b/arch/xtensa/variants/test_mmuhifi_c3/include/variant/core.h
new file mode 100644
index 000000000..7c5d3a22d
--- /dev/null
+++ b/arch/xtensa/variants/test_mmuhifi_c3/include/variant/core.h
@@ -0,0 +1,383 @@
+/*
+ * Xtensa processor core configuration information.
+ *
+ * This file is subject to the terms and conditions of version 2.1 of the GNU
+ * Lesser General Public License as published by the Free Software Foundation.
+ *
+ * Copyright (c) 1999-2009 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_CORE_CONFIGURATION_H
+#define _XTENSA_CORE_CONFIGURATION_H
+
+
+/****************************************************************************
+	    Parameters Useful for Any Code, USER or PRIVILEGED
+ ****************************************************************************/
+
+/*
+ *  Note:  Macros of the form XCHAL_HAVE_*** have a value of 1 if the option is
+ *  configured, and a value of 0 otherwise.  These macros are always defined.
+ */
+
+
+/*----------------------------------------------------------------------
+				ISA
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_BE			0	/* big-endian byte ordering */
+#define XCHAL_HAVE_WINDOWED		1	/* windowed registers option */
+#define XCHAL_NUM_AREGS			32	/* num of physical addr regs */
+#define XCHAL_NUM_AREGS_LOG2		5	/* log2(XCHAL_NUM_AREGS) */
+#define XCHAL_MAX_INSTRUCTION_SIZE	8	/* max instr bytes (3..8) */
+#define XCHAL_HAVE_DEBUG		1	/* debug option */
+#define XCHAL_HAVE_DENSITY		1	/* 16-bit instructions */
+#define XCHAL_HAVE_LOOPS		1	/* zero-overhead loops */
+#define XCHAL_HAVE_NSA			1	/* NSA/NSAU instructions */
+#define XCHAL_HAVE_MINMAX		1	/* MIN/MAX instructions */
+#define XCHAL_HAVE_SEXT			1	/* SEXT instruction */
+#define XCHAL_HAVE_CLAMPS		1	/* CLAMPS instruction */
+#define XCHAL_HAVE_MUL16		1	/* MUL16S/MUL16U instructions */
+#define XCHAL_HAVE_MUL32		1	/* MULL instruction */
+#define XCHAL_HAVE_MUL32_HIGH		0	/* MULUH/MULSH instructions */
+#define XCHAL_HAVE_DIV32		0	/* QUOS/QUOU/REMS/REMU instructions */
+#define XCHAL_HAVE_L32R			1	/* L32R instruction */
+#define XCHAL_HAVE_ABSOLUTE_LITERALS	1	/* non-PC-rel (extended) L32R */
+#define XCHAL_HAVE_CONST16		0	/* CONST16 instruction */
+#define XCHAL_HAVE_ADDX			1	/* ADDX#/SUBX# instructions */
+#define XCHAL_HAVE_WIDE_BRANCHES	0	/* B*.W18 or B*.W15 instr's */
+#define XCHAL_HAVE_PREDICTED_BRANCHES	0	/* B[EQ/EQZ/NE/NEZ]T instr's */
+#define XCHAL_HAVE_CALL4AND12		1	/* (obsolete option) */
+#define XCHAL_HAVE_ABS			1	/* ABS instruction */
+/*#define XCHAL_HAVE_POPC		0*/	/* POPC instruction */
+/*#define XCHAL_HAVE_CRC		0*/	/* CRC instruction */
+#define XCHAL_HAVE_RELEASE_SYNC		1	/* L32AI/S32RI instructions */
+#define XCHAL_HAVE_S32C1I		1	/* S32C1I instruction */
+#define XCHAL_HAVE_SPECULATION		0	/* speculation */
+#define XCHAL_HAVE_FULL_RESET		1	/* all regs/state reset */
+#define XCHAL_NUM_CONTEXTS		1	/* */
+#define XCHAL_NUM_MISC_REGS		2	/* num of scratch regs (0..4) */
+#define XCHAL_HAVE_TAP_MASTER		0	/* JTAG TAP control instr's */
+#define XCHAL_HAVE_PRID			1	/* processor ID register */
+#define XCHAL_HAVE_EXTERN_REGS		1	/* WER/RER instructions */
+#define XCHAL_HAVE_MP_INTERRUPTS	1	/* interrupt distributor port */
+#define XCHAL_HAVE_MP_RUNSTALL		1	/* core RunStall control port */
+#define XCHAL_HAVE_THREADPTR		1	/* THREADPTR register */
+#define XCHAL_HAVE_BOOLEANS		1	/* boolean registers */
+#define XCHAL_HAVE_CP			1	/* CPENABLE reg (coprocessor) */
+#define XCHAL_CP_MAXCFG			2	/* max allowed cp id plus one */
+#define XCHAL_HAVE_MAC16		0	/* MAC16 package */
+#define XCHAL_HAVE_VECTORFPU2005	0	/* vector floating-point pkg */
+#define XCHAL_HAVE_FP			0	/* floating point pkg */
+#define XCHAL_HAVE_DFP			0	/* double precision FP pkg */
+#define XCHAL_HAVE_DFP_accel		0	/* double precision FP acceleration pkg */
+#define XCHAL_HAVE_VECTRA1		0	/* Vectra I  pkg */
+#define XCHAL_HAVE_VECTRALX		0	/* Vectra LX pkg */
+#define XCHAL_HAVE_HIFIPRO		0	/* HiFiPro Audio Engine pkg */
+#define XCHAL_HAVE_HIFI2		1	/* HiFi2 Audio Engine pkg */
+#define XCHAL_HAVE_CONNXD2		0	/* ConnX D2 pkg */
+
+
+/*----------------------------------------------------------------------
+				MISC
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_WRITEBUFFER_ENTRIES	8	/* size of write buffer */
+#define XCHAL_INST_FETCH_WIDTH		8	/* instr-fetch width in bytes */
+#define XCHAL_DATA_WIDTH		8	/* data width in bytes */
+/*  In T1050, applies to selected core load and store instructions (see ISA): */
+#define XCHAL_UNALIGNED_LOAD_EXCEPTION	1	/* unaligned loads cause exc. */
+#define XCHAL_UNALIGNED_STORE_EXCEPTION	1	/* unaligned stores cause exc.*/
+#define XCHAL_UNALIGNED_LOAD_HW		0	/* unaligned loads work in hw */
+#define XCHAL_UNALIGNED_STORE_HW	0	/* unaligned stores work in hw*/
+
+#define XCHAL_SW_VERSION		800000	/* sw version of this header */
+
+#define XCHAL_CORE_ID			"test_mmuhifi_c3"	/* alphanum core name
+						   (CoreID) set in the Xtensa
+						   Processor Generator */
+
+#define XCHAL_CORE_DESCRIPTION		"test_mmuhifi_c3"
+#define XCHAL_BUILD_UNIQUE_ID		0x00005A6A	/* 22-bit sw build ID */
+
+/*
+ *  These definitions describe the hardware targeted by this software.
+ */
+#define XCHAL_HW_CONFIGID0		0xC1B3CBFE	/* ConfigID hi 32 bits*/
+#define XCHAL_HW_CONFIGID1		0x10405A6A	/* ConfigID lo 32 bits*/
+#define XCHAL_HW_VERSION_NAME		"LX3.0.0"	/* full version name */
+#define XCHAL_HW_VERSION_MAJOR		2300	/* major ver# of targeted hw */
+#define XCHAL_HW_VERSION_MINOR		0	/* minor ver# of targeted hw */
+#define XCHAL_HW_VERSION		230000	/* major*100+minor */
+#define XCHAL_HW_REL_LX3		1
+#define XCHAL_HW_REL_LX3_0		1
+#define XCHAL_HW_REL_LX3_0_0		1
+#define XCHAL_HW_CONFIGID_RELIABLE	1
+/*  If software targets a *range* of hardware versions, these are the bounds: */
+#define XCHAL_HW_MIN_VERSION_MAJOR	2300	/* major v of earliest tgt hw */
+#define XCHAL_HW_MIN_VERSION_MINOR	0	/* minor v of earliest tgt hw */
+#define XCHAL_HW_MIN_VERSION		230000	/* earliest targeted hw */
+#define XCHAL_HW_MAX_VERSION_MAJOR	2300	/* major v of latest tgt hw */
+#define XCHAL_HW_MAX_VERSION_MINOR	0	/* minor v of latest tgt hw */
+#define XCHAL_HW_MAX_VERSION		230000	/* latest targeted hw */
+
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_ICACHE_LINESIZE		32	/* I-cache line size in bytes */
+#define XCHAL_DCACHE_LINESIZE		32	/* D-cache line size in bytes */
+#define XCHAL_ICACHE_LINEWIDTH		5	/* log2(I line size in bytes) */
+#define XCHAL_DCACHE_LINEWIDTH		5	/* log2(D line size in bytes) */
+
+#define XCHAL_ICACHE_SIZE		16384	/* I-cache size in bytes or 0 */
+#define XCHAL_DCACHE_SIZE		16384	/* D-cache size in bytes or 0 */
+
+#define XCHAL_DCACHE_IS_WRITEBACK	1	/* writeback feature */
+#define XCHAL_DCACHE_IS_COHERENT	1	/* MP coherence feature */
+
+
+
+
+/****************************************************************************
+    Parameters Useful for PRIVILEGED (Supervisory or Non-Virtualized) Code
+ ****************************************************************************/
+
+
+#ifndef XTENSA_HAL_NON_PRIVILEGED_ONLY
+
+/*----------------------------------------------------------------------
+				CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_PIF			1	/* any outbound PIF present */
+
+/*  If present, cache size in bytes == (ways * 2^(linewidth + setwidth)).  */
+
+/*  Number of cache sets in log2(lines per way):  */
+#define XCHAL_ICACHE_SETWIDTH		8
+#define XCHAL_DCACHE_SETWIDTH		8
+
+/*  Cache set associativity (number of ways):  */
+#define XCHAL_ICACHE_WAYS		2
+#define XCHAL_DCACHE_WAYS		2
+
+/*  Cache features:  */
+#define XCHAL_ICACHE_LINE_LOCKABLE	0
+#define XCHAL_DCACHE_LINE_LOCKABLE	0
+#define XCHAL_ICACHE_ECC_PARITY		0
+#define XCHAL_DCACHE_ECC_PARITY		0
+
+/*  Cache access size in bytes (affects operation of SICW instruction):  */
+#define XCHAL_ICACHE_ACCESS_SIZE	8
+#define XCHAL_DCACHE_ACCESS_SIZE	8
+
+/*  Number of encoded cache attr bits (see <xtensa/hal.h> for decoded bits):  */
+#define XCHAL_CA_BITS			4
+
+
+/*----------------------------------------------------------------------
+			INTERNAL I/D RAM/ROMs and XLMI
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_INSTROM		0	/* number of core instr. ROMs */
+#define XCHAL_NUM_INSTRAM		0	/* number of core instr. RAMs */
+#define XCHAL_NUM_DATAROM		0	/* number of core data ROMs */
+#define XCHAL_NUM_DATARAM		0	/* number of core data RAMs */
+#define XCHAL_NUM_URAM			0	/* number of core unified RAMs*/
+#define XCHAL_NUM_XLMI			0	/* number of core XLMI ports */
+
+
+/*----------------------------------------------------------------------
+			INTERRUPTS and TIMERS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_INTERRUPTS		1	/* interrupt option */
+#define XCHAL_HAVE_HIGHPRI_INTERRUPTS	1	/* med/high-pri. interrupts */
+#define XCHAL_HAVE_NMI			0	/* non-maskable interrupt */
+#define XCHAL_HAVE_CCOUNT		1	/* CCOUNT reg. (timer option) */
+#define XCHAL_NUM_TIMERS		2	/* number of CCOMPAREn regs */
+#define XCHAL_NUM_INTERRUPTS		12	/* number of interrupts */
+#define XCHAL_NUM_INTERRUPTS_LOG2	4	/* ceil(log2(NUM_INTERRUPTS)) */
+#define XCHAL_NUM_EXTINTERRUPTS		9	/* num of external interrupts */
+#define XCHAL_NUM_INTLEVELS		2	/* number of interrupt levels
+						   (not including level zero) */
+#define XCHAL_EXCM_LEVEL		1	/* level masked by PS.EXCM */
+	/* (always 1 in XEA1; levels 2 .. EXCM_LEVEL are "medium priority") */
+
+/*  Masks of interrupts at each interrupt level:  */
+#define XCHAL_INTLEVEL1_MASK		0x00000FFF
+#define XCHAL_INTLEVEL2_MASK		0x00000000
+#define XCHAL_INTLEVEL3_MASK		0x00000000
+#define XCHAL_INTLEVEL4_MASK		0x00000000
+#define XCHAL_INTLEVEL5_MASK		0x00000000
+#define XCHAL_INTLEVEL6_MASK		0x00000000
+#define XCHAL_INTLEVEL7_MASK		0x00000000
+
+/*  Masks of interrupts at each range 1..n of interrupt levels:  */
+#define XCHAL_INTLEVEL1_ANDBELOW_MASK	0x00000FFF
+#define XCHAL_INTLEVEL2_ANDBELOW_MASK	0x00000FFF
+#define XCHAL_INTLEVEL3_ANDBELOW_MASK	0x00000FFF
+#define XCHAL_INTLEVEL4_ANDBELOW_MASK	0x00000FFF
+#define XCHAL_INTLEVEL5_ANDBELOW_MASK	0x00000FFF
+#define XCHAL_INTLEVEL6_ANDBELOW_MASK	0x00000FFF
+#define XCHAL_INTLEVEL7_ANDBELOW_MASK	0x00000FFF
+
+/*  Level of each interrupt:  */
+#define XCHAL_INT0_LEVEL		1
+#define XCHAL_INT1_LEVEL		1
+#define XCHAL_INT2_LEVEL		1
+#define XCHAL_INT3_LEVEL		1
+#define XCHAL_INT4_LEVEL		1
+#define XCHAL_INT5_LEVEL		1
+#define XCHAL_INT6_LEVEL		1
+#define XCHAL_INT7_LEVEL		1
+#define XCHAL_INT8_LEVEL		1
+#define XCHAL_INT9_LEVEL		1
+#define XCHAL_INT10_LEVEL		1
+#define XCHAL_INT11_LEVEL		1
+#define XCHAL_DEBUGLEVEL		2	/* debug interrupt level */
+#define XCHAL_HAVE_DEBUG_EXTERN_INT	1	/* OCD external db interrupt */
+
+/*  Type of each interrupt:  */
+#define XCHAL_INT0_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT1_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT2_TYPE 	XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT3_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT4_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT5_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT6_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT7_TYPE 	XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT8_TYPE 	XTHAL_INTTYPE_TIMER
+#define XCHAL_INT9_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT10_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT11_TYPE 	XTHAL_INTTYPE_EXTERN_LEVEL
+
+/*  Masks of interrupts for each type of interrupt:  */
+#define XCHAL_INTTYPE_MASK_UNCONFIGURED	0xFFFFF000
+#define XCHAL_INTTYPE_MASK_SOFTWARE	0x00000080
+#define XCHAL_INTTYPE_MASK_EXTERN_EDGE	0x00000004
+#define XCHAL_INTTYPE_MASK_EXTERN_LEVEL	0x00000E3B
+#define XCHAL_INTTYPE_MASK_TIMER	0x00000140
+#define XCHAL_INTTYPE_MASK_NMI		0x00000000
+#define XCHAL_INTTYPE_MASK_WRITE_ERROR	0x00000000
+
+/*  Interrupt numbers assigned to specific interrupt sources:  */
+#define XCHAL_TIMER0_INTERRUPT		6	/* CCOMPARE0 */
+#define XCHAL_TIMER1_INTERRUPT		8	/* CCOMPARE1 */
+#define XCHAL_TIMER2_INTERRUPT		XTHAL_TIMER_UNCONFIGURED
+#define XCHAL_TIMER3_INTERRUPT		XTHAL_TIMER_UNCONFIGURED
+
+/*  Interrupt numbers for levels at which only one interrupt is configured:  */
+/*  (There are many interrupts each at level(s) 1.)  */
+
+
+/*
+ *  External interrupt vectors/levels.
+ *  These macros describe how Xtensa processor interrupt numbers
+ *  (as numbered internally, eg. in INTERRUPT and INTENABLE registers)
+ *  map to external BInterrupt<n> pins, for those interrupts
+ *  configured as external (level-triggered, edge-triggered, or NMI).
+ *  See the Xtensa processor databook for more details.
+ */
+
+/*  Core interrupt numbers mapped to each EXTERNAL interrupt number:  */
+#define XCHAL_EXTINT0_NUM		0	/* (intlevel 1) */
+#define XCHAL_EXTINT1_NUM		1	/* (intlevel 1) */
+#define XCHAL_EXTINT2_NUM		2	/* (intlevel 1) */
+#define XCHAL_EXTINT3_NUM		3	/* (intlevel 1) */
+#define XCHAL_EXTINT4_NUM		4	/* (intlevel 1) */
+#define XCHAL_EXTINT5_NUM		5	/* (intlevel 1) */
+#define XCHAL_EXTINT6_NUM		9	/* (intlevel 1) */
+#define XCHAL_EXTINT7_NUM		10	/* (intlevel 1) */
+#define XCHAL_EXTINT8_NUM		11	/* (intlevel 1) */
+
+
+/*----------------------------------------------------------------------
+			EXCEPTIONS and VECTORS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_XEA_VERSION		2	/* Xtensa Exception Architecture
+						   number: 1 == XEA1 (old)
+							   2 == XEA2 (new)
+							   0 == XEAX (extern) */
+#define XCHAL_HAVE_XEA1			0	/* Exception Architecture 1 */
+#define XCHAL_HAVE_XEA2			1	/* Exception Architecture 2 */
+#define XCHAL_HAVE_XEAX			0	/* External Exception Arch. */
+#define XCHAL_HAVE_EXCEPTIONS		1	/* exception option */
+#define XCHAL_HAVE_MEM_ECC_PARITY	0	/* local memory ECC/parity */
+#define XCHAL_HAVE_VECTOR_SELECT	1	/* relocatable vectors */
+#define XCHAL_HAVE_VECBASE		1	/* relocatable vectors */
+#define XCHAL_VECBASE_RESET_VADDR	0xD0000000  /* VECBASE reset value */
+#define XCHAL_VECBASE_RESET_PADDR	0x00000000
+#define XCHAL_RESET_VECBASE_OVERLAP	0
+
+#define XCHAL_RESET_VECTOR0_VADDR	0xFE000000
+#define XCHAL_RESET_VECTOR0_PADDR	0xFE000000
+#define XCHAL_RESET_VECTOR1_VADDR	0xD8000500
+#define XCHAL_RESET_VECTOR1_PADDR	0x00000500
+#define XCHAL_RESET_VECTOR_VADDR	0xFE000000
+#define XCHAL_RESET_VECTOR_PADDR	0xFE000000
+#define XCHAL_USER_VECOFS		0x00000340
+#define XCHAL_USER_VECTOR_VADDR		0xD0000340
+#define XCHAL_USER_VECTOR_PADDR		0x00000340
+#define XCHAL_KERNEL_VECOFS		0x00000300
+#define XCHAL_KERNEL_VECTOR_VADDR	0xD0000300
+#define XCHAL_KERNEL_VECTOR_PADDR	0x00000300
+#define XCHAL_DOUBLEEXC_VECOFS		0x000003C0
+#define XCHAL_DOUBLEEXC_VECTOR_VADDR	0xD00003C0
+#define XCHAL_DOUBLEEXC_VECTOR_PADDR	0x000003C0
+#define XCHAL_WINDOW_OF4_VECOFS		0x00000000
+#define XCHAL_WINDOW_UF4_VECOFS		0x00000040
+#define XCHAL_WINDOW_OF8_VECOFS		0x00000080
+#define XCHAL_WINDOW_UF8_VECOFS		0x000000C0
+#define XCHAL_WINDOW_OF12_VECOFS	0x00000100
+#define XCHAL_WINDOW_UF12_VECOFS	0x00000140
+#define XCHAL_WINDOW_VECTORS_VADDR	0xD0000000
+#define XCHAL_WINDOW_VECTORS_PADDR	0x00000000
+#define XCHAL_INTLEVEL2_VECOFS		0x00000280
+#define XCHAL_INTLEVEL2_VECTOR_VADDR	0xD0000280
+#define XCHAL_INTLEVEL2_VECTOR_PADDR	0x00000280
+#define XCHAL_DEBUG_VECOFS		XCHAL_INTLEVEL2_VECOFS
+#define XCHAL_DEBUG_VECTOR_VADDR	XCHAL_INTLEVEL2_VECTOR_VADDR
+#define XCHAL_DEBUG_VECTOR_PADDR	XCHAL_INTLEVEL2_VECTOR_PADDR
+
+
+/*----------------------------------------------------------------------
+				DEBUG
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_OCD			1	/* OnChipDebug option */
+#define XCHAL_NUM_IBREAK		0	/* number of IBREAKn regs */
+#define XCHAL_NUM_DBREAK		0	/* number of DBREAKn regs */
+#define XCHAL_HAVE_OCD_DIR_ARRAY	0	/* faster OCD option */
+
+
+/*----------------------------------------------------------------------
+				MMU
+  ----------------------------------------------------------------------*/
+
+/*  See core-matmap.h header file for more details.  */
+
+#define XCHAL_HAVE_TLBS			1	/* inverse of HAVE_CACHEATTR */
+#define XCHAL_HAVE_SPANNING_WAY		0	/* one way maps I+D 4GB vaddr */
+#define XCHAL_HAVE_IDENTITY_MAP		0	/* vaddr == paddr always */
+#define XCHAL_HAVE_CACHEATTR		0	/* CACHEATTR register present */
+#define XCHAL_HAVE_MIMIC_CACHEATTR	0	/* region protection */
+#define XCHAL_HAVE_XLT_CACHEATTR	0	/* region prot. w/translation */
+#define XCHAL_HAVE_PTP_MMU		1	/* full MMU (with page table
+						   [autorefill] and protection)
+						   usable for an MMU-based OS */
+/*  If none of the above last 4 are set, it's a custom TLB configuration.  */
+#define XCHAL_ITLB_ARF_ENTRIES_LOG2	2	/* log2(autorefill way size) */
+#define XCHAL_DTLB_ARF_ENTRIES_LOG2	2	/* log2(autorefill way size) */
+
+#define XCHAL_MMU_ASID_BITS		8	/* number of bits in ASIDs */
+#define XCHAL_MMU_RINGS			4	/* number of rings (1..4) */
+#define XCHAL_MMU_RING_BITS		2	/* num of bits in RING field */
+
+#endif /* !XTENSA_HAL_NON_PRIVILEGED_ONLY */
+
+
+#endif /* _XTENSA_CORE_CONFIGURATION_H */
diff --git a/arch/xtensa/variants/test_mmuhifi_c3/include/variant/tie-asm.h b/arch/xtensa/variants/test_mmuhifi_c3/include/variant/tie-asm.h
new file mode 100644
index 000000000..6e9d69caf
--- /dev/null
+++ b/arch/xtensa/variants/test_mmuhifi_c3/include/variant/tie-asm.h
@@ -0,0 +1,182 @@
+/*
+ * This header file contains assembly-language definitions (assembly
+ * macros, etc.) for this specific Xtensa processor's TIE extensions
+ * and options.  It is customized to this Xtensa processor configuration.
+ *
+ * This file is subject to the terms and conditions of version 2.1 of the GNU
+ * Lesser General Public License as published by the Free Software Foundation.
+ *
+ * Copyright (C) 1999-2009 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_CORE_TIE_ASM_H
+#define _XTENSA_CORE_TIE_ASM_H
+
+/*  Selection parameter values for save-area save/restore macros:  */
+/*  Option vs. TIE:  */
+#define XTHAL_SAS_TIE	0x0001	/* custom extension or coprocessor */
+#define XTHAL_SAS_OPT	0x0002	/* optional (and not a coprocessor) */
+/*  Whether used automatically by compiler:  */
+#define XTHAL_SAS_NOCC	0x0004	/* not used by compiler w/o special opts/code */
+#define XTHAL_SAS_CC	0x0008	/* used by compiler without special opts/code */
+/*  ABI handling across function calls:  */
+#define XTHAL_SAS_CALR	0x0010	/* caller-saved */
+#define XTHAL_SAS_CALE	0x0020	/* callee-saved */
+#define XTHAL_SAS_GLOB	0x0040	/* global across function calls (in thread) */
+/*  Misc  */
+#define XTHAL_SAS_ALL	0xFFFF	/* include all default NCP contents */
+
+
+
+/* Macro to save all non-coprocessor (extra) custom TIE and optional state
+ * (not including zero-overhead loop registers).
+ * Save area ptr (clobbered):  ptr  (8 byte aligned)
+ * Scratch regs  (clobbered):  at1..at4  (only first XCHAL_NCP_NUM_ATMPS needed)
+ */
+	.macro xchal_ncp_store  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL
+	xchal_sa_start	\continue, \ofs
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
+	xchal_sa_align	\ptr, 0, 1024-4, 4, 4
+	rsr	\at1, BR		// boolean option
+	s32i	\at1, \ptr, .Lxchal_ofs_ + 0
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
+	xchal_sa_align	\ptr, 0, 1024-4, 4, 4
+	rsr	\at1, SCOMPARE1		// conditional store option
+	s32i	\at1, \ptr, .Lxchal_ofs_ + 0
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~\select
+	xchal_sa_align	\ptr, 0, 1024-4, 4, 4
+	rur	\at1, THREADPTR		// threadptr option
+	s32i	\at1, \ptr, .Lxchal_ofs_ + 0
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	.endm	// xchal_ncp_store
+
+/* Macro to save all non-coprocessor (extra) custom TIE and optional state
+ * (not including zero-overhead loop registers).
+ * Save area ptr (clobbered):  ptr  (8 byte aligned)
+ * Scratch regs  (clobbered):  at1..at4  (only first XCHAL_NCP_NUM_ATMPS needed)
+ */
+	.macro xchal_ncp_load  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL
+	xchal_sa_start	\continue, \ofs
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
+	xchal_sa_align	\ptr, 0, 1024-4, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_ + 0
+	wsr	\at1, BR		// boolean option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
+	xchal_sa_align	\ptr, 0, 1024-4, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_ + 0
+	wsr	\at1, SCOMPARE1		// conditional store option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~\select
+	xchal_sa_align	\ptr, 0, 1024-4, 4, 4
+	l32i	\at1, \ptr, .Lxchal_ofs_ + 0
+	wur	\at1, THREADPTR		// threadptr option
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 4
+	.endif
+	.endm	// xchal_ncp_load
+
+
+
+#define XCHAL_NCP_NUM_ATMPS	1
+
+
+
+/* Macro to save the state of TIE coprocessor AudioEngineLX.
+ * Save area ptr (clobbered):  ptr  (8 byte aligned)
+ * Scratch regs  (clobbered):  at1..at4  (only first XCHAL_CP1_NUM_ATMPS needed)
+ */
+#define xchal_cp_AudioEngineLX_store	xchal_cp1_store
+/* #define xchal_cp_AudioEngineLX_store_a2	xchal_cp1_store a2 a3 a4 a5 a6 */
+	.macro	xchal_cp1_store  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL
+	xchal_sa_start \continue, \ofs
+	.ifeq (XTHAL_SAS_TIE | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
+	xchal_sa_align	\ptr, 0, 0, 1, 8
+	rur240	\at1		// AE_OVF_SAR
+	s32i	\at1, \ptr, 0
+	rur241	\at1		// AE_BITHEAD
+	s32i	\at1, \ptr, 4
+	rur242	\at1		// AE_TS_FTS_BU_BP
+	s32i	\at1, \ptr, 8
+	rur243	\at1		// AE_SD_NO
+	s32i	\at1, \ptr, 12
+	AE_SP24X2S.I aep0, \ptr,  16
+	AE_SP24X2S.I aep1, \ptr,  24
+	AE_SP24X2S.I aep2, \ptr,  32
+	AE_SP24X2S.I aep3, \ptr,  40
+	AE_SP24X2S.I aep4, \ptr,  48
+	AE_SP24X2S.I aep5, \ptr,  56
+	addi	\ptr, \ptr, 64
+	AE_SP24X2S.I aep6, \ptr,  0
+	AE_SP24X2S.I aep7, \ptr,  8
+	AE_SQ56S.I aeq0, \ptr,  16
+	AE_SQ56S.I aeq1, \ptr,  24
+	AE_SQ56S.I aeq2, \ptr,  32
+	AE_SQ56S.I aeq3, \ptr,  40
+	.set	.Lxchal_pofs_, .Lxchal_pofs_ + 64
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 112
+	.endif
+	.endm	// xchal_cp1_store
+
+/* Macro to restore the state of TIE coprocessor AudioEngineLX.
+ * Save area ptr (clobbered):  ptr  (8 byte aligned)
+ * Scratch regs  (clobbered):  at1..at4  (only first XCHAL_CP1_NUM_ATMPS needed)
+ */
+#define xchal_cp_AudioEngineLX_load	xchal_cp1_load
+/* #define xchal_cp_AudioEngineLX_load_a2	xchal_cp1_load a2 a3 a4 a5 a6 */
+	.macro	xchal_cp1_load  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL
+	xchal_sa_start \continue, \ofs
+	.ifeq (XTHAL_SAS_TIE | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
+	xchal_sa_align	\ptr, 0, 0, 1, 8
+	l32i	\at1, \ptr, 0
+	wur240	\at1		// AE_OVF_SAR
+	l32i	\at1, \ptr, 4
+	wur241	\at1		// AE_BITHEAD
+	l32i	\at1, \ptr, 8
+	wur242	\at1		// AE_TS_FTS_BU_BP
+	l32i	\at1, \ptr, 12
+	wur243	\at1		// AE_SD_NO
+	addi	\ptr, \ptr, 80
+	AE_LQ56.I aeq0, \ptr,  0
+	AE_LQ56.I aeq1, \ptr,  8
+	AE_LQ56.I aeq2, \ptr,  16
+	AE_LQ56.I aeq3, \ptr,  24
+	AE_LP24X2.I aep0, \ptr,  -64
+	AE_LP24X2.I aep1, \ptr,  -56
+	AE_LP24X2.I aep2, \ptr,  -48
+	AE_LP24X2.I aep3, \ptr,  -40
+	AE_LP24X2.I aep4, \ptr,  -32
+	AE_LP24X2.I aep5, \ptr,  -24
+	AE_LP24X2.I aep6, \ptr,  -16
+	AE_LP24X2.I aep7, \ptr,  -8
+	.set	.Lxchal_pofs_, .Lxchal_pofs_ + 80
+	.set	.Lxchal_ofs_, .Lxchal_ofs_ + 112
+	.endif
+	.endm	// xchal_cp1_load
+
+#define XCHAL_CP1_NUM_ATMPS	1
+#define XCHAL_SA_NUM_ATMPS	1
+
+	/*  Empty macros for unconfigured coprocessors:  */
+	.macro xchal_cp0_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp0_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp2_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp2_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp3_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp3_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp4_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp4_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp5_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp5_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp6_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp6_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp7_store	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+	.macro xchal_cp7_load	p a b c d continue=0 ofs=-1 select=-1 ; .endm
+
+#endif /*_XTENSA_CORE_TIE_ASM_H*/
diff --git a/arch/xtensa/variants/test_mmuhifi_c3/include/variant/tie.h b/arch/xtensa/variants/test_mmuhifi_c3/include/variant/tie.h
new file mode 100644
index 000000000..fb1f5f004
--- /dev/null
+++ b/arch/xtensa/variants/test_mmuhifi_c3/include/variant/tie.h
@@ -0,0 +1,140 @@
+/*
+ * This header file describes this specific Xtensa processor's TIE extensions
+ * that extend basic Xtensa core functionality.  It is customized to this
+ * Xtensa processor configuration.
+ *
+ * This file is subject to the terms and conditions of version 2.1 of the GNU
+ * Lesser General Public License as published by the Free Software Foundation.
+ *
+ * Copyright (C) 1999-2009 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_CORE_TIE_H
+#define _XTENSA_CORE_TIE_H
+
+#define XCHAL_CP_NUM			1	/* number of coprocessors */
+#define XCHAL_CP_MAX			2	/* max CP ID + 1 (0 if none) */
+#define XCHAL_CP_MASK			0x02	/* bitmask of all CPs by ID */
+#define XCHAL_CP_PORT_MASK		0x00	/* bitmask of only port CPs */
+
+/*  Basic parameters of each coprocessor:  */
+#define XCHAL_CP1_NAME			"AudioEngineLX"
+#define XCHAL_CP1_IDENT			AudioEngineLX
+#define XCHAL_CP1_SA_SIZE		112	/* size of state save area */
+#define XCHAL_CP1_SA_ALIGN		8	/* min alignment of save area */
+#define XCHAL_CP_ID_AUDIOENGINELX	1	/* coprocessor ID (0..7) */
+
+/*  Filler info for unassigned coprocessors, to simplify arrays etc:  */
+#define XCHAL_CP0_SA_SIZE		0
+#define XCHAL_CP0_SA_ALIGN		1
+#define XCHAL_CP2_SA_SIZE		0
+#define XCHAL_CP2_SA_ALIGN		1
+#define XCHAL_CP3_SA_SIZE		0
+#define XCHAL_CP3_SA_ALIGN		1
+#define XCHAL_CP4_SA_SIZE		0
+#define XCHAL_CP4_SA_ALIGN		1
+#define XCHAL_CP5_SA_SIZE		0
+#define XCHAL_CP5_SA_ALIGN		1
+#define XCHAL_CP6_SA_SIZE		0
+#define XCHAL_CP6_SA_ALIGN		1
+#define XCHAL_CP7_SA_SIZE		0
+#define XCHAL_CP7_SA_ALIGN		1
+
+/*  Save area for non-coprocessor optional and custom (TIE) state:  */
+#define XCHAL_NCP_SA_SIZE		12
+#define XCHAL_NCP_SA_ALIGN		4
+
+/*  Total save area for optional and custom state (NCP + CPn):  */
+#define XCHAL_TOTAL_SA_SIZE		128	/* with 16-byte align padding */
+#define XCHAL_TOTAL_SA_ALIGN		8	/* actual minimum alignment */
+
+/*
+ * Detailed contents of save areas.
+ * NOTE:  caller must define the XCHAL_SA_REG macro (not defined here)
+ * before expanding the XCHAL_xxx_SA_LIST() macros.
+ *
+ * XCHAL_SA_REG(s,ccused,abikind,kind,opt,name,galign,align,asize,
+ *		dbnum,base,regnum,bitsz,gapsz,reset,x...)
+ *
+ *	s = passed from XCHAL_*_LIST(s), eg. to select how to expand
+ *	ccused = set if used by compiler without special options or code
+ *	abikind = 0 (caller-saved), 1 (callee-saved), or 2 (thread-global)
+ *	kind = 0 (special reg), 1 (TIE user reg), or 2 (TIE regfile reg)
+ *	opt = 0 (custom TIE extension or coprocessor), or 1 (optional reg)
+ *	name = lowercase reg name (no quotes)
+ *	galign = group byte alignment (power of 2) (galign >= align)
+ *	align = register byte alignment (power of 2)
+ *	asize = allocated size in bytes (asize*8 == bitsz + gapsz + padsz)
+ *	  (not including any pad bytes required to galign this or next reg)
+ *	dbnum = unique target number f/debug (see <xtensa-libdb-macros.h>)
+ *	base = reg shortname w/o index (or sr=special, ur=TIE user reg)
+ *	regnum = reg index in regfile, or special/TIE-user reg number
+ *	bitsz = number of significant bits (regfile width, or ur/sr mask bits)
+ *	gapsz = intervening bits, if bitsz bits not stored contiguously
+ *	(padsz = pad bits at end [TIE regfile] or at msbits [ur,sr] of asize)
+ *	reset = register reset value (or 0 if undefined at reset)
+ *	x = reserved for future use (0 until then)
+ *
+ *  To filter out certain registers, e.g. to expand only the non-global
+ *  registers used by the compiler, you can do something like this:
+ *
+ *  #define XCHAL_SA_REG(s,ccused,p...)	SELCC##ccused(p)
+ *  #define SELCC0(p...)
+ *  #define SELCC1(abikind,p...)	SELAK##abikind(p)
+ *  #define SELAK0(p...)		REG(p)
+ *  #define SELAK1(p...)		REG(p)
+ *  #define SELAK2(p...)
+ *  #define REG(kind,tie,name,galn,aln,asz,csz,dbnum,base,rnum,bsz,rst,x...) \
+ *		...what you want to expand...
+ */
+
+#define XCHAL_NCP_SA_NUM	3
+#define XCHAL_NCP_SA_LIST(s)	\
+ XCHAL_SA_REG(s,0,0,0,1,             br, 4, 4, 4,0x0204,  sr,4  , 16,0,0,0) \
+ XCHAL_SA_REG(s,0,0,0,1,      scompare1, 4, 4, 4,0x020C,  sr,12 , 32,0,0,0) \
+ XCHAL_SA_REG(s,1,2,1,1,      threadptr, 4, 4, 4,0x03E7,  ur,231, 32,0,0,0)
+
+#define XCHAL_CP0_SA_NUM	0
+#define XCHAL_CP0_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP1_SA_NUM	16
+#define XCHAL_CP1_SA_LIST(s)	\
+ XCHAL_SA_REG(s,0,0,1,0,     ae_ovf_sar, 8, 4, 4,0x03F0,  ur,240,  7,0,0,0) \
+ XCHAL_SA_REG(s,0,0,1,0,     ae_bithead, 4, 4, 4,0x03F1,  ur,241, 32,0,0,0) \
+ XCHAL_SA_REG(s,0,0,1,0,ae_ts_fts_bu_bp, 4, 4, 4,0x03F2,  ur,242, 16,0,0,0) \
+ XCHAL_SA_REG(s,0,0,1,0,       ae_sd_no, 4, 4, 4,0x03F3,  ur,243, 28,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aep0, 8, 8, 8,0x0060, aep,0  , 48,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aep1, 8, 8, 8,0x0061, aep,1  , 48,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aep2, 8, 8, 8,0x0062, aep,2  , 48,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aep3, 8, 8, 8,0x0063, aep,3  , 48,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aep4, 8, 8, 8,0x0064, aep,4  , 48,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aep5, 8, 8, 8,0x0065, aep,5  , 48,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aep6, 8, 8, 8,0x0066, aep,6  , 48,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aep7, 8, 8, 8,0x0067, aep,7  , 48,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aeq0, 8, 8, 8,0x0068, aeq,0  , 56,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aeq1, 8, 8, 8,0x0069, aeq,1  , 56,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aeq2, 8, 8, 8,0x006A, aeq,2  , 56,0,0,0) \
+ XCHAL_SA_REG(s,0,0,2,0,           aeq3, 8, 8, 8,0x006B, aeq,3  , 56,0,0,0)
+
+#define XCHAL_CP2_SA_NUM	0
+#define XCHAL_CP2_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP3_SA_NUM	0
+#define XCHAL_CP3_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP4_SA_NUM	0
+#define XCHAL_CP4_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP5_SA_NUM	0
+#define XCHAL_CP5_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP6_SA_NUM	0
+#define XCHAL_CP6_SA_LIST(s)	/* empty */
+
+#define XCHAL_CP7_SA_NUM	0
+#define XCHAL_CP7_SA_LIST(s)	/* empty */
+
+/* Byte length of instruction from its first nibble (op0 field), per FLIX.  */
+#define XCHAL_OP0_FORMAT_LENGTHS	3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,8
+
+#endif /*_XTENSA_CORE_TIE_H*/