# SPDX-License-Identifier: GPL-2.0-only

  #
  # Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
  #

  
  config ARC
  	def_bool y

  	select ARC_TIMERS

  	select ARCH_HAS_DMA_COHERENT_TO_PFN

  	select ARCH_HAS_DMA_PREP_COHERENT

  	select ARCH_HAS_PTE_SPECIAL

  	select ARCH_HAS_SETUP_DMA_OPS

  	select ARCH_HAS_SYNC_DMA_FOR_CPU
  	select ARCH_HAS_SYNC_DMA_FOR_DEVICE

  	select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC

  	select ARCH_32BIT_OFF_T

  	select BUILDTIME_EXTABLE_SORT

  	select CLONE_BACKWARDS

  	select COMMON_CLK

  	select DMA_DIRECT_REMAP

  	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_IOREMAP_PROT

  	select HAVE_KERNEL_GZIP
  	select HAVE_KERNEL_LZMA

  	select HAVE_KPROBES
  	select HAVE_KRETPROBES

  	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 OF
  	select OF_EARLY_FLATTREE

  	select PCI_SYSCALL if PCI

  	select PERF_USE_VMALLOC if ARC_CACHE_VIPT_ALIASING

  config ARCH_HAS_CACHE_LINE_SIZE
  	def_bool y

  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 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"

  	help
  	  Build kernel for Big Endian Mode of ARC CPU

  config SMP

  	bool "Symmetric Multi-Processing"

  	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

  endif #ARC_CACHE

  config ARC_HAS_ICCM
  	bool "Use ICCM"
  	help
  	  Single Cycle RAMS to store Fast Path Code

  
  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

  
  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"

  	# 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"

  	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_USE_UNALIGNED_MEM_ACCESS
  	bool "Enable unaligned access in HW"
  	default y
  	select HAVE_EFFICIENT_UNALIGNED_ACCESS
  	help
  	  The ARC HS architecture supports unaligned memory access
  	  which is disabled by default. Enable unaligned access in
  	  hardware and use software to use it

  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"

  	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"

  	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"

  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"

  source "kernel/power/Kconfig"