Adding upstream version 4.19.249.upstream/4.19.249upstream

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

2 files changed, 584 insertions, 0 deletions

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
new file mode 100644
index 000000000..0cce54182
--- /dev/null
+++ b/arch/arc/Kconfig
@@ -0,0 +1,574 @@
+#
+# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+
+config ARC
+	def_bool y
+	select ARC_TIMERS
+	select ARCH_HAS_PTE_SPECIAL
+	select ARCH_HAS_SYNC_DMA_FOR_CPU
+	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
+	select ARCH_HAS_SG_CHAIN
+	select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC
+	select BUILDTIME_EXTABLE_SORT
+	select CLONE_BACKWARDS
+	select COMMON_CLK
+	select DMA_NONCOHERENT_OPS
+	select DMA_NONCOHERENT_MMAP
+	select GENERIC_ATOMIC64 if !ISA_ARCV2 || !(ARC_HAS_LL64 && ARC_HAS_LLSC)
+	select GENERIC_CLOCKEVENTS
+	select GENERIC_FIND_FIRST_BIT
+	# for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP
+	select GENERIC_IRQ_SHOW
+	select GENERIC_PCI_IOMAP
+	select GENERIC_PENDING_IRQ if SMP
+	select GENERIC_SCHED_CLOCK
+	select GENERIC_SMP_IDLE_THREAD
+	select HAVE_ARCH_KGDB
+	select HAVE_ARCH_TRACEHOOK
+	select HAVE_DEBUG_STACKOVERFLOW
+	select HAVE_FUTEX_CMPXCHG if FUTEX
+	select HAVE_GENERIC_DMA_COHERENT
+	select HAVE_IOREMAP_PROT
+	select HAVE_KERNEL_GZIP
+	select HAVE_KERNEL_LZMA
+	select HAVE_KPROBES
+	select HAVE_KRETPROBES
+	select HAVE_MEMBLOCK
+	select HAVE_MOD_ARCH_SPECIFIC
+	select HAVE_OPROFILE
+	select HAVE_PERF_EVENTS
+	select HANDLE_DOMAIN_IRQ
+	select IRQ_DOMAIN
+	select MODULES_USE_ELF_RELA
+	select NO_BOOTMEM
+	select OF
+	select OF_EARLY_FLATTREE
+	select OF_RESERVED_MEM
+	select PERF_USE_VMALLOC if ARC_CACHE_VIPT_ALIASING
+
+config ARCH_HAS_CACHE_LINE_SIZE
+	def_bool y
+
+config MIGHT_HAVE_PCI
+	bool
+
+config TRACE_IRQFLAGS_SUPPORT
+	def_bool y
+
+config LOCKDEP_SUPPORT
+	def_bool y
+
+config SCHED_OMIT_FRAME_POINTER
+	def_bool y
+
+config GENERIC_CSUM
+	def_bool y
+
+config RWSEM_GENERIC_SPINLOCK
+	def_bool y
+
+config ARCH_DISCONTIGMEM_ENABLE
+	def_bool n
+
+config ARCH_FLATMEM_ENABLE
+	def_bool y
+
+config MMU
+	def_bool y
+
+config NO_IOPORT_MAP
+	def_bool y
+
+config GENERIC_CALIBRATE_DELAY
+	def_bool y
+
+config GENERIC_HWEIGHT
+	def_bool y
+
+config STACKTRACE_SUPPORT
+	def_bool y
+	select STACKTRACE
+
+config HAVE_ARCH_TRANSPARENT_HUGEPAGE
+	def_bool y
+	depends on ARC_MMU_V4
+
+menu "ARC Architecture Configuration"
+
+menu "ARC Platform/SoC/Board"
+
+source "arch/arc/plat-tb10x/Kconfig"
+source "arch/arc/plat-axs10x/Kconfig"
+#New platform adds here
+source "arch/arc/plat-eznps/Kconfig"
+source "arch/arc/plat-hsdk/Kconfig"
+
+endmenu
+
+choice
+	prompt "ARC Instruction Set"
+	default ISA_ARCV2
+
+config ISA_ARCOMPACT
+	bool "ARCompact ISA"
+	select CPU_NO_EFFICIENT_FFS
+	help
+	  The original ARC ISA of ARC600/700 cores
+
+config ISA_ARCV2
+	bool "ARC ISA v2"
+	select ARC_TIMERS_64BIT
+	help
+	  ISA for the Next Generation ARC-HS cores
+
+endchoice
+
+menu "ARC CPU Configuration"
+
+choice
+	prompt "ARC Core"
+	default ARC_CPU_770 if ISA_ARCOMPACT
+	default ARC_CPU_HS if ISA_ARCV2
+
+if ISA_ARCOMPACT
+
+config ARC_CPU_750D
+	bool "ARC750D"
+	select ARC_CANT_LLSC
+	help
+	  Support for ARC750 core
+
+config ARC_CPU_770
+	bool "ARC770"
+	select ARC_HAS_SWAPE
+	help
+	  Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
+	  This core has a bunch of cool new features:
+	  -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
+                   Shared Address Spaces (for sharing TLB entries in MMU)
+	  -Caches: New Prog Model, Region Flush
+	  -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
+
+endif	#ISA_ARCOMPACT
+
+config ARC_CPU_HS
+	bool "ARC-HS"
+	depends on ISA_ARCV2
+	help
+	  Support for ARC HS38x Cores based on ARCv2 ISA
+	  The notable features are:
+	    - SMP configurations of upto 4 core with coherency
+	    - Optional L2 Cache and IO-Coherency
+	    - Revised Interrupt Architecture (multiple priorites, reg banks,
+	        auto stack switch, auto regfile save/restore)
+	    - MMUv4 (PIPT dcache, Huge Pages)
+	    - Instructions for
+		* 64bit load/store: LDD, STD
+		* Hardware assisted divide/remainder: DIV, REM
+		* Function prologue/epilogue: ENTER_S, LEAVE_S
+		* IRQ enable/disable: CLRI, SETI
+		* pop count: FFS, FLS
+		* SETcc, BMSKN, XBFU...
+
+endchoice
+
+config CPU_BIG_ENDIAN
+	bool "Enable Big Endian Mode"
+	default n
+	help
+	  Build kernel for Big Endian Mode of ARC CPU
+
+config SMP
+	bool "Symmetric Multi-Processing"
+	default n
+	select ARC_MCIP if ISA_ARCV2
+	help
+	  This enables support for systems with more than one CPU.
+
+if SMP
+
+config NR_CPUS
+	int "Maximum number of CPUs (2-4096)"
+	range 2 4096
+	default "4"
+
+config ARC_SMP_HALT_ON_RESET
+	bool "Enable Halt-on-reset boot mode"
+	help
+	  In SMP configuration cores can be configured as Halt-on-reset
+	  or they could all start at same time. For Halt-on-reset, non
+	  masters are parked until Master kicks them so they can start of
+	  at designated entry point. For other case, all jump to common
+	  entry point and spin wait for Master's signal.
+
+endif	#SMP
+
+config ARC_MCIP
+	bool "ARConnect Multicore IP (MCIP) Support "
+	depends on ISA_ARCV2
+	default y if SMP
+	help
+	  This IP block enables SMP in ARC-HS38 cores.
+	  It provides for cross-core interrupts, multi-core debug
+	  hardware semaphores, shared memory,....
+
+menuconfig ARC_CACHE
+	bool "Enable Cache Support"
+	default y
+
+if ARC_CACHE
+
+config ARC_CACHE_LINE_SHIFT
+	int "Cache Line Length (as power of 2)"
+	range 5 7
+	default "6"
+	help
+	  Starting with ARC700 4.9, Cache line length is configurable,
+	  This option specifies "N", with Line-len = 2 power N
+	  So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
+	  Linux only supports same line lengths for I and D caches.
+
+config ARC_HAS_ICACHE
+	bool "Use Instruction Cache"
+	default y
+
+config ARC_HAS_DCACHE
+	bool "Use Data Cache"
+	default y
+
+config ARC_CACHE_PAGES
+	bool "Per Page Cache Control"
+	default y
+	depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
+	help
+	  This can be used to over-ride the global I/D Cache Enable on a
+	  per-page basis (but only for pages accessed via MMU such as
+	  Kernel Virtual address or User Virtual Address)
+	  TLB entries have a per-page Cache Enable Bit.
+	  Note that Global I/D ENABLE + Per Page DISABLE works but corollary
+	  Global DISABLE + Per Page ENABLE won't work
+
+config ARC_CACHE_VIPT_ALIASING
+	bool "Support VIPT Aliasing D$"
+	depends on ARC_HAS_DCACHE && ISA_ARCOMPACT
+	default n
+
+endif	#ARC_CACHE
+
+config ARC_HAS_ICCM
+	bool "Use ICCM"
+	help
+	  Single Cycle RAMS to store Fast Path Code
+	default n
+
+config ARC_ICCM_SZ
+	int "ICCM Size in KB"
+	default "64"
+	depends on ARC_HAS_ICCM
+
+config ARC_HAS_DCCM
+	bool "Use DCCM"
+	help
+	  Single Cycle RAMS to store Fast Path Data
+	default n
+
+config ARC_DCCM_SZ
+	int "DCCM Size in KB"
+	default "64"
+	depends on ARC_HAS_DCCM
+
+config ARC_DCCM_BASE
+	hex "DCCM map address"
+	default "0xA0000000"
+	depends on ARC_HAS_DCCM
+
+choice
+	prompt "MMU Version"
+	default ARC_MMU_V3 if ARC_CPU_770
+	default ARC_MMU_V2 if ARC_CPU_750D
+	default ARC_MMU_V4 if ARC_CPU_HS
+
+if ISA_ARCOMPACT
+
+config ARC_MMU_V1
+	bool "MMU v1"
+	help
+	  Orig ARC700 MMU
+
+config ARC_MMU_V2
+	bool "MMU v2"
+	help
+	  Fixed the deficiency of v1 - possible thrashing in memcpy scenario
+	  when 2 D-TLB and 1 I-TLB entries index into same 2way set.
+
+config ARC_MMU_V3
+	bool "MMU v3"
+	depends on ARC_CPU_770
+	help
+	  Introduced with ARC700 4.10: New Features
+	  Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
+	  Shared Address Spaces (SASID)
+
+endif
+
+config ARC_MMU_V4
+	bool "MMU v4"
+	depends on ISA_ARCV2
+
+endchoice
+
+
+choice
+	prompt "MMU Page Size"
+	default ARC_PAGE_SIZE_8K
+
+config ARC_PAGE_SIZE_8K
+	bool "8KB"
+	help
+	  Choose between 8k vs 16k
+
+config ARC_PAGE_SIZE_16K
+	bool "16KB"
+	depends on ARC_MMU_V3 || ARC_MMU_V4
+
+config ARC_PAGE_SIZE_4K
+	bool "4KB"
+	depends on ARC_MMU_V3 || ARC_MMU_V4
+
+endchoice
+
+choice
+	prompt "MMU Super Page Size"
+	depends on ISA_ARCV2 && TRANSPARENT_HUGEPAGE
+	default ARC_HUGEPAGE_2M
+
+config ARC_HUGEPAGE_2M
+	bool "2MB"
+
+config ARC_HUGEPAGE_16M
+	bool "16MB"
+
+endchoice
+
+config NODES_SHIFT
+	int "Maximum NUMA Nodes (as a power of 2)"
+	default "0" if !DISCONTIGMEM
+	default "1" if DISCONTIGMEM
+	depends on NEED_MULTIPLE_NODES
+	---help---
+	  Accessing memory beyond 1GB (with or w/o PAE) requires 2 memory
+	  zones.
+
+if ISA_ARCOMPACT
+
+config ARC_COMPACT_IRQ_LEVELS
+	bool "Setup Timer IRQ as high Priority"
+	default n
+	# if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
+	depends on !SMP
+
+config ARC_FPU_SAVE_RESTORE
+	bool "Enable FPU state persistence across context switch"
+	default n
+	help
+	  Double Precision Floating Point unit had dedicated regs which
+	  need to be saved/restored across context-switch.
+	  Note that ARC FPU is overly simplistic, unlike say x86, which has
+	  hardware pieces to allow software to conditionally save/restore,
+	  based on actual usage of FPU by a task. Thus our implemn does
+	  this for all tasks in system.
+
+endif	#ISA_ARCOMPACT
+
+config ARC_CANT_LLSC
+	def_bool n
+
+config ARC_HAS_LLSC
+	bool "Insn: LLOCK/SCOND (efficient atomic ops)"
+	default y
+	depends on !ARC_CANT_LLSC
+
+config ARC_HAS_SWAPE
+	bool "Insn: SWAPE (endian-swap)"
+	default y
+
+if ISA_ARCV2
+
+config ARC_HAS_LL64
+	bool "Insn: 64bit LDD/STD"
+	help
+	  Enable gcc to generate 64-bit load/store instructions
+	  ISA mandates even/odd registers to allow encoding of two
+	  dest operands with 2 possible source operands.
+	default y
+
+config ARC_HAS_DIV_REM
+	bool "Insn: div, divu, rem, remu"
+	default y
+
+config ARC_HAS_ACCL_REGS
+	bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6)"
+	default y
+	help
+	  Depending on the configuration, CPU can contain accumulator reg-pair
+	  (also referred to as r58:r59). These can also be used by gcc as GPR so
+	  kernel needs to save/restore per process
+
+config ARC_IRQ_NO_AUTOSAVE
+	bool "Disable hardware autosave regfile on interrupts"
+	default n
+	help
+	  On HS cores, taken interrupt auto saves the regfile on stack.
+	  This is programmable and can be optionally disabled in which case
+	  software INTERRUPT_PROLOGUE/EPILGUE do the needed work
+
+endif	# ISA_ARCV2
+
+endmenu   # "ARC CPU Configuration"
+
+config LINUX_LINK_BASE
+	hex "Kernel link address"
+	default "0x80000000"
+	help
+	  ARC700 divides the 32 bit phy address space into two equal halves
+	  -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
+	  -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
+	  Typically Linux kernel is linked at the start of untransalted addr,
+	  hence the default value of 0x8zs.
+	  However some customers have peripherals mapped at this addr, so
+	  Linux needs to be scooted a bit.
+	  If you don't know what the above means, leave this setting alone.
+	  This needs to match memory start address specified in Device Tree
+
+config LINUX_RAM_BASE
+	hex "RAM base address"
+	default LINUX_LINK_BASE
+	help
+	  By default Linux is linked at base of RAM. However in some special
+	  cases (such as HSDK), Linux can't be linked at start of DDR, hence
+	  this option.
+
+config HIGHMEM
+	bool "High Memory Support"
+	select ARCH_DISCONTIGMEM_ENABLE
+	help
+	  With ARC 2G:2G address split, only upper 2G is directly addressable by
+	  kernel. Enable this to potentially allow access to rest of 2G and PAE
+	  in future
+
+config ARC_HAS_PAE40
+	bool "Support for the 40-bit Physical Address Extension"
+	default n
+	depends on ISA_ARCV2
+	select HIGHMEM
+	select PHYS_ADDR_T_64BIT
+	help
+	  Enable access to physical memory beyond 4G, only supported on
+	  ARC cores with 40 bit Physical Addressing support
+
+config ARC_KVADDR_SIZE
+	int "Kernel Virtual Address Space size (MB)"
+	range 0 512
+	default "256"
+	help
+	  The kernel address space is carved out of 256MB of translated address
+	  space for catering to vmalloc, modules, pkmap, fixmap. This however may
+	  not suffice vmalloc requirements of a 4K CPU EZChip system. So allow
+	  this to be stretched to 512 MB (by extending into the reserved
+	  kernel-user gutter)
+
+config ARC_CURR_IN_REG
+	bool "Dedicate Register r25 for current_task pointer"
+	default y
+	help
+	  This reserved Register R25 to point to Current Task in
+	  kernel mode. This saves memory access for each such access
+
+
+config ARC_EMUL_UNALIGNED
+	bool "Emulate unaligned memory access (userspace only)"
+	select SYSCTL_ARCH_UNALIGN_NO_WARN
+	select SYSCTL_ARCH_UNALIGN_ALLOW
+	depends on ISA_ARCOMPACT
+	help
+	  This enables misaligned 16 & 32 bit memory access from user space.
+	  Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
+	  potential bugs in code
+
+config HZ
+	int "Timer Frequency"
+	default 100
+
+config ARC_METAWARE_HLINK
+	bool "Support for Metaware debugger assisted Host access"
+	default n
+	help
+	  This options allows a Linux userland apps to directly access
+	  host file system (open/creat/read/write etc) with help from
+	  Metaware Debugger. This can come in handy for Linux-host communication
+	  when there is no real usable peripheral such as EMAC.
+
+menuconfig ARC_DBG
+	bool "ARC debugging"
+	default y
+
+if ARC_DBG
+
+config ARC_DW2_UNWIND
+	bool "Enable DWARF specific kernel stack unwind"
+	default y
+	select KALLSYMS
+	help
+	  Compiles the kernel with DWARF unwind information and can be used
+	  to get stack backtraces.
+
+	  If you say Y here the resulting kernel image will be slightly larger
+	  but not slower, and it will give very useful debugging information.
+	  If you don't debug the kernel, you can say N, but we may not be able
+	  to solve problems without frame unwind information
+
+config ARC_DBG_TLB_PARANOIA
+	bool "Paranoia Checks in Low Level TLB Handlers"
+	default n
+
+endif
+
+config ARC_BUILTIN_DTB_NAME
+	string "Built in DTB"
+	help
+	  Set the name of the DTB to embed in the vmlinux binary
+	  Leaving it blank selects the minimal "skeleton" dtb
+
+endmenu	 # "ARC Architecture Configuration"
+
+config FORCE_MAX_ZONEORDER
+	int "Maximum zone order"
+	default "12" if ARC_HUGEPAGE_16M
+	default "11"
+
+menu "Bus Support"
+
+config PCI
+	bool "PCI support" if MIGHT_HAVE_PCI
+	help
+	  PCI is the name of a bus system, i.e., the way the CPU talks to
+	  the other stuff inside your box.  Find out if your board/platform
+	  has PCI.
+
+	  Note: PCIe support for Synopsys Device will be available only
+	  when HAPS DX is configured with PCIe RC bitmap. If you have PCI,
+	  say Y, otherwise N.
+
+config PCI_SYSCALL
+	def_bool PCI
+
+source "drivers/pci/Kconfig"
+
+endmenu
+
+source "kernel/power/Kconfig"
diff --git a/arch/arc/Kconfig.debug b/arch/arc/Kconfig.debug
new file mode 100644
index 000000000..45add86de
--- /dev/null
+++ b/arch/arc/Kconfig.debug
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config 16KSTACKS
+	bool "Use 16Kb for kernel stacks instead of 8Kb"
+	help
+	  If you say Y here the kernel will use a  16Kb stacksize for the
+	  kernel stack attached to each process/thread. The default is 8K.
+	  This increases the resident kernel footprint and will cause less
+	  threads to run on the system and also increase the pressure
+	  on the VM subsystem for higher order allocations.