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Diffstat (limited to '')
| -rw-r--r-- | arch/xtensa/Kconfig | 586 | ||||
| -rw-r--r-- | arch/xtensa/Kconfig.debug | 33 |
2 files changed, 619 insertions, 0 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig new file mode 100644 index 000000000..d9b0709d6 --- /dev/null +++ b/arch/xtensa/Kconfig @@ -0,0 +1,586 @@ +# SPDX-License-Identifier: GPL-2.0 +config ZONE_DMA + def_bool y + +config XTENSA + def_bool y + select ARCH_HAS_SG_CHAIN + select ARCH_HAS_SYNC_DMA_FOR_CPU + select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select ARCH_NO_COHERENT_DMA_MMAP if !MMU + select ARCH_WANT_FRAME_POINTERS + select ARCH_WANT_IPC_PARSE_VERSION + select BUILDTIME_EXTABLE_SORT + select CLONE_BACKWARDS + select COMMON_CLK + select DMA_NONCOHERENT_OPS + select GENERIC_ATOMIC64 + select GENERIC_CLOCKEVENTS + select GENERIC_IRQ_SHOW + select GENERIC_PCI_IOMAP + select GENERIC_SCHED_CLOCK + select GENERIC_STRNCPY_FROM_USER if KASAN + select HAVE_ARCH_KASAN if MMU + select HAVE_DEBUG_KMEMLEAK + select HAVE_DMA_CONTIGUOUS + select HAVE_EXIT_THREAD + select HAVE_FUNCTION_TRACER + select HAVE_FUTEX_CMPXCHG if !MMU && FUTEX + select HAVE_HW_BREAKPOINT if PERF_EVENTS + select HAVE_IRQ_TIME_ACCOUNTING + select HAVE_MEMBLOCK + select HAVE_OPROFILE + select HAVE_PERF_EVENTS + select HAVE_STACKPROTECTOR + select IRQ_DOMAIN + select MODULES_USE_ELF_RELA + select NO_BOOTMEM + select PERF_USE_VMALLOC + select VIRT_TO_BUS + 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 RWSEM_XCHGADD_ALGORITHM + def_bool y + +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 TRACE_IRQFLAGS_SUPPORT + def_bool y + +config MMU + def_bool n + +config HAVE_XTENSA_GPIO32 + def_bool n + +config KASAN_SHADOW_OFFSET + hex + default 0x6e400000 + +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. + Dont 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 XTENSA_UNALIGNED_USER + bool "Unaligned memory access in use 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 use 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 in 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 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 wont + 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 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, so e.g. + for region protection MMUs: 2 is cache bypass, 4 is WB cached, + 1 is WT cached, f is illegal. For ful MMU: bit 0 makes it executable, + bit 1 makes it writable, bits 2..3 meaning is 0: cache bypass, + 1: WB cache, 2: WT cache, 3: special (c and e are illegal, f is + reserved). + +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_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. + +config VECTORS_OFFSET + hex "Kernel vectors offset" + default 0x00003000 + help + This is the offset of the kernel image from the relocatable vectors + base. + + 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 + 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 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. + +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 + +menu "Bus options" + +config PCI + bool "PCI support" + default y + help + Find out whether you have a PCI motherboard. PCI is the name of a + bus system, i.e. the way the CPU talks to the other stuff inside + your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or + VESA. If you have PCI, say Y, otherwise N. + +source "drivers/pci/Kconfig" + +endmenu + +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" + select HAVE_IDE + 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 + 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 + select OF_RESERVED_MEM + help + Include support for flattened device tree machine descriptions. + +config BUILTIN_DTB + 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. + +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 FORCE_MAX_ZONEORDER + 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. + +source "drivers/pcmcia/Kconfig" + +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. + +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. + +endmenu + +menu "Power management options" + +source "kernel/power/Kconfig" + +endmenu diff --git a/arch/xtensa/Kconfig.debug b/arch/xtensa/Kconfig.debug new file mode 100644 index 000000000..39de98e20 --- /dev/null +++ b/arch/xtensa/Kconfig.debug @@ -0,0 +1,33 @@ +# 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. |