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

  #
  # For a description of the syntax of this configuration file,

  # see Documentation/kbuild/kconfig-language.rst.

  #

  config 64BIT
  	bool
  
  config 32BIT
  	bool

  config RISCV
  	def_bool y

  	select ARCH_CLOCKSOURCE_INIT

  	select ARCH_SUPPORTS_ATOMIC_RMW

  	select ARCH_HAS_BINFMT_FLAT

  	select ARCH_HAS_DEBUG_VM_PGTABLE

  	select ARCH_HAS_DEBUG_VIRTUAL if MMU

  	select ARCH_HAS_DEBUG_WX

  	select ARCH_HAS_GCOV_PROFILE_ALL
  	select ARCH_HAS_GIGANTIC_PAGE

  	select ARCH_HAS_KCOV

  	select ARCH_HAS_MMIOWB
  	select ARCH_HAS_PTE_SPECIAL
  	select ARCH_HAS_SET_DIRECT_MAP
  	select ARCH_HAS_SET_MEMORY
  	select ARCH_HAS_STRICT_KERNEL_RWX if MMU

  	select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX
  	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT

  	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU

  	select ARCH_WANT_FRAME_POINTERS

  	select ARCH_WANT_HUGE_PMD_SHARE if 64BIT

  	select CLONE_BACKWARDS

  	select CLINT_TIMER if !MMU

  	select COMMON_CLK

  	select EDAC_SUPPORT
  	select GENERIC_ARCH_TOPOLOGY if SMP
  	select GENERIC_ATOMIC64 if !64BIT

  	select GENERIC_CLOCKEVENTS

  	select GENERIC_EARLY_IOREMAP

  	select GENERIC_GETTIMEOFDAY if HAVE_GENERIC_VDSO

  	select GENERIC_IOREMAP
  	select GENERIC_IRQ_MULTI_HANDLER

  	select GENERIC_IRQ_SHOW
  	select GENERIC_PCI_IOMAP

  	select GENERIC_PTDUMP if MMU

  	select GENERIC_SCHED_CLOCK

  	select GENERIC_SMP_IDLE_THREAD

  	select GENERIC_STRNCPY_FROM_USER if MMU
  	select GENERIC_STRNLEN_USER if MMU

  	select GENERIC_TIME_VSYSCALL if MMU && 64BIT

  	select HANDLE_DOMAIN_IRQ

  	select HAVE_ARCH_AUDITSYSCALL

  	select HAVE_ARCH_JUMP_LABEL
  	select HAVE_ARCH_JUMP_LABEL_RELATIVE

  	select HAVE_ARCH_KASAN if MMU && 64BIT
  	select HAVE_ARCH_KGDB
  	select HAVE_ARCH_KGDB_QXFER_PKT
  	select HAVE_ARCH_MMAP_RND_BITS if MMU

  	select HAVE_ARCH_SECCOMP_FILTER

  	select HAVE_ARCH_TRACEHOOK

  	select HAVE_ASM_MODVERSIONS

  	select HAVE_CONTEXT_TRACKING

  	select HAVE_DEBUG_KMEMLEAK

  	select HAVE_DMA_CONTIGUOUS if MMU

  	select HAVE_EBPF_JIT if MMU

  	select HAVE_FUTEX_CMPXCHG if FUTEX

  	select HAVE_GCC_PLUGINS

  	select HAVE_GENERIC_VDSO if MMU && 64BIT

  	select HAVE_PCI

  	select HAVE_PERF_EVENTS

  	select HAVE_PERF_REGS
  	select HAVE_PERF_USER_STACK_DUMP

  	select HAVE_STACKPROTECTOR

  	select HAVE_SYSCALL_TRACEPOINTS

  	select IRQ_DOMAIN

  	select MODULES_USE_ELF_RELA if MODULES

  	select MODULE_SECTIONS if MODULES

  	select OF
  	select OF_EARLY_FLATTREE
  	select OF_IRQ

  	select PCI_DOMAINS_GENERIC if PCI

  	select PCI_MSI if PCI

  	select RISCV_INTC

  	select RISCV_TIMER if RISCV_SBI

  	select SPARSEMEM_STATIC if 32BIT

  	select SPARSE_IRQ
  	select SYSCTL_EXCEPTION_TRACE
  	select THREAD_INFO_IN_TASK

  	select UACCESS_MEMCPY if !MMU

  
  config ARCH_MMAP_RND_BITS_MIN
  	default 18 if 64BIT
  	default 8
  
  # max bits determined by the following formula:
  #  VA_BITS - PAGE_SHIFT - 3
  config ARCH_MMAP_RND_BITS_MAX
  	default 24 if 64BIT # SV39 based
  	default 17

  # set if we run in machine mode, cleared if we run in supervisor mode
  config RISCV_M_MODE
  	bool

  	default !MMU

  # set if we are running in S-mode and can use SBI calls
  config RISCV_SBI
  	bool
  	depends on !RISCV_M_MODE
  	default y

  config MMU

  	bool "MMU-based Paged Memory Management Support"
  	default y
  	help
  	  Select if you want MMU-based virtualised addressing space
  	  support by paged memory management. If unsure, say 'Y'.

  config ZONE_DMA32
  	bool

  	default y if 64BIT

  config VA_BITS
  	int
  	default 32 if 32BIT
  	default 39 if 64BIT
  
  config PA_BITS
  	int
  	default 34 if 32BIT
  	default 56 if 64BIT

  config PAGE_OFFSET
  	hex
  	default 0xC0000000 if 32BIT && MAXPHYSMEM_2GB

  	default 0x80000000 if 64BIT && !MMU

  	default 0xffffffff80000000 if 64BIT && MAXPHYSMEM_2GB
  	default 0xffffffe000000000 if 64BIT && MAXPHYSMEM_128GB

  config ARCH_FLATMEM_ENABLE
  	def_bool y
  
  config ARCH_SPARSEMEM_ENABLE
  	def_bool y

  	depends on MMU

  	select SPARSEMEM_VMEMMAP_ENABLE
  
  config ARCH_SELECT_MEMORY_MODEL
  	def_bool ARCH_SPARSEMEM_ENABLE

  config ARCH_WANT_GENERAL_HUGETLB
  	def_bool y

  config ARCH_SUPPORTS_DEBUG_PAGEALLOC
  	def_bool y

  config SYS_SUPPORTS_HUGETLBFS

  	depends on MMU

  	def_bool y

  config STACKTRACE_SUPPORT
  	def_bool y

  config TRACE_IRQFLAGS_SUPPORT
  	def_bool y

  config GENERIC_BUG
  	def_bool y
  	depends on BUG
  	select GENERIC_BUG_RELATIVE_POINTERS if 64BIT
  
  config GENERIC_BUG_RELATIVE_POINTERS
  	bool
  
  config GENERIC_CALIBRATE_DELAY
  	def_bool y
  
  config GENERIC_CSUM
  	def_bool y
  
  config GENERIC_HWEIGHT
  	def_bool y

  config FIX_EARLYCON_MEM

  	def_bool MMU

  config PGTABLE_LEVELS
  	int
  	default 3 if 64BIT
  	default 2

  config LOCKDEP_SUPPORT
  	def_bool y

  source "arch/riscv/Kconfig.socs"

  menu "Platform type"
  
  choice
  	prompt "Base ISA"
  	default ARCH_RV64I
  	help

  	  This selects the base ISA that this kernel will target and must match

  	  the target platform.
  
  config ARCH_RV32I
  	bool "RV32I"

  	select 32BIT

  	select GENERIC_LIB_ASHLDI3
  	select GENERIC_LIB_ASHRDI3
  	select GENERIC_LIB_LSHRDI3

  	select GENERIC_LIB_UCMPDI2

  	select MMU

  
  config ARCH_RV64I
  	bool "RV64I"

  	select 64BIT

  	select ARCH_SUPPORTS_INT128 if CC_HAS_INT128 && GCC_VERSION >= 50000

  	select HAVE_DYNAMIC_FTRACE if MMU
  	select HAVE_DYNAMIC_FTRACE_WITH_REGS if HAVE_DYNAMIC_FTRACE

  	select HAVE_FTRACE_MCOUNT_RECORD
  	select HAVE_FUNCTION_GRAPH_TRACER
  	select HAVE_FUNCTION_TRACER

  	select SWIOTLB if MMU

  
  endchoice
  
  # We must be able to map all physical memory into the kernel, but the compiler
  # is still a bit more efficient when generating code if it's setup in a manner
  # such that it can only map 2GiB of memory.
  choice
  	prompt "Kernel Code Model"
  	default CMODEL_MEDLOW if 32BIT
  	default CMODEL_MEDANY if 64BIT
  
  	config CMODEL_MEDLOW
  		bool "medium low code model"
  	config CMODEL_MEDANY
  		bool "medium any code model"
  endchoice

  config MODULE_SECTIONS
  	bool
  	select HAVE_MOD_ARCH_SPECIFIC

  choice
  	prompt "Maximum Physical Memory"
  	default MAXPHYSMEM_2GB if 32BIT
  	default MAXPHYSMEM_2GB if 64BIT && CMODEL_MEDLOW
  	default MAXPHYSMEM_128GB if 64BIT && CMODEL_MEDANY
  
  	config MAXPHYSMEM_2GB
  		bool "2GiB"
  	config MAXPHYSMEM_128GB
  		depends on 64BIT && CMODEL_MEDANY
  		bool "128GiB"
  endchoice
  
  
  config SMP
  	bool "Symmetric Multi-Processing"
  	help
  	  This enables support for systems with more than one CPU.  If
  	  you say N here, the kernel will run on single and
  	  multiprocessor machines, but will use only one CPU of a
  	  multiprocessor machine. If you say Y here, the kernel will run
  	  on many, but not all, single processor machines. On a single
  	  processor machine, the kernel will run faster if you say N
  	  here.
  
  	  If you don't know what to do here, say N.
  
  config NR_CPUS
  	int "Maximum number of CPUs (2-32)"
  	range 2 32
  	depends on SMP
  	default "8"

  config HOTPLUG_CPU
  	bool "Support for hot-pluggable CPUs"
  	depends on SMP
  	select GENERIC_IRQ_MIGRATION
  	help
  
  	  Say Y here to experiment with turning CPUs off and on.  CPUs
  	  can be controlled through /sys/devices/system/cpu.
  
  	  Say N if you want to disable CPU hotplug.

  choice
  	prompt "CPU Tuning"
  	default TUNE_GENERIC
  
  config TUNE_GENERIC
  	bool "generic"
  
  endchoice
  
  config RISCV_ISA_C
  	bool "Emit compressed instructions when building Linux"
  	default y
  	help
  	   Adds "C" to the ISA subsets that the toolchain is allowed to emit
  	   when building Linux, which results in compressed instructions in the
  	   Linux binary.
  
  	   If you don't know what to do here, say Y.

  menu "supported PMU type"
  	depends on PERF_EVENTS
  
  config RISCV_BASE_PMU
  	bool "Base Performance Monitoring Unit"
  	def_bool y
  	help
  	  A base PMU that serves as a reference implementation and has limited
  	  feature of perf.  It can run on any RISC-V machines so serves as the
  	  fallback, but this option can also be disable to reduce kernel size.
  
  endmenu

  config FPU
  	bool "FPU support"
  	default y
  	help
  	  Say N here if you want to disable all floating-point related procedure
  	  in the kernel.
  
  	  If you don't know what to do here, say Y.

  endmenu

  menu "Kernel features"

  source "kernel/Kconfig.hz"

  config RISCV_SBI_V01
  	bool "SBI v0.1 support"
  	default y
  	depends on RISCV_SBI
  	help
  	  This config allows kernel to use SBI v0.1 APIs. This will be
  	  deprecated in future once legacy M-mode software are no longer in use.

  endmenu

  menu "Boot options"

  config CMDLINE
  	string "Built-in kernel command line"

  	help

  	  For most platforms, the arguments for the kernel's command line
  	  are provided at run-time, during boot. However, there are cases
  	  where either no arguments are being provided or the provided
  	  arguments are insufficient or even invalid.

  	  When that occurs, it is possible to define a built-in command
  	  line here and choose how the kernel should use it later on.

  choice
  	prompt "Built-in command line usage" if CMDLINE != ""
  	default CMDLINE_FALLBACK
  	help
  	  Choose how the kernel will handle the provided built-in command
  	  line.

  config CMDLINE_FALLBACK
  	bool "Use bootloader kernel arguments if available"

  	help

  	  Use the built-in command line as fallback in case we get nothing
  	  during boot. This is the default behaviour.
  
  config CMDLINE_EXTEND
  	bool "Extend bootloader kernel arguments"
  	help
  	  The command-line arguments provided during boot will be
  	  appended to the built-in command line. This is useful in
  	  cases where the provided arguments are insufficient and
  	  you don't want to or cannot modify them.

  
  config CMDLINE_FORCE

  	bool "Always use the default kernel command string"

  	help

  	  Always use the built-in command line, even if we get one during
  	  boot. This is useful in case you need to override the provided
  	  command line on systems where you don't have or want control
  	  over it.

  endchoice

  config EFI_STUB
  	bool
  
  config EFI
  	bool "UEFI runtime support"
  	depends on OF
  	select LIBFDT
  	select UCS2_STRING
  	select EFI_PARAMS_FROM_FDT
  	select EFI_STUB
  	select EFI_GENERIC_STUB

  	select EFI_RUNTIME_WRAPPERS

  	select RISCV_ISA_C

  	depends on MMU

  	default y
  	help
  	  This option provides support for runtime services provided
  	  by UEFI firmware (such as non-volatile variables, realtime
  	  clock, and platform reset). A UEFI stub is also provided to
  	  allow the kernel to be booted as an EFI application. This
  	  is only useful on systems that have UEFI firmware.

  endmenu

  config BUILTIN_DTB
  	def_bool n
  	depends on RISCV_M_MODE
  	depends on OF

  menu "Power management options"

  source "kernel/power/Kconfig"

  
  endmenu

  
  source "drivers/firmware/Kconfig"