arch/csky/Kconfig

# SPDX-License-Identifier: GPL-2.0-only
config CSKY
	def_bool y
	select ARCH_32BIT_OFF_T
	select ARCH_HAS_DMA_PREP_COHERENT
	select ARCH_HAS_GCOV_PROFILE_ALL
	select ARCH_HAS_SYNC_DMA_FOR_CPU
	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
	select ARCH_USE_BUILTIN_BSWAP
	select ARCH_USE_QUEUED_RWLOCKS if NR_CPUS>2
	select ARCH_WANT_FRAME_POINTERS if !CPU_CK610
	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
	select COMMON_CLK
	select CLKSRC_MMIO
	select CSKY_MPINTC if CPU_CK860
	select CSKY_MP_TIMER if CPU_CK860
	select CSKY_APB_INTC
	select DMA_DIRECT_REMAP
	select IRQ_DOMAIN
	select HANDLE_DOMAIN_IRQ
	select DW_APB_TIMER_OF
	select GENERIC_IOREMAP
	select GENERIC_LIB_ASHLDI3
	select GENERIC_LIB_ASHRDI3
	select GENERIC_LIB_LSHRDI3
	select GENERIC_LIB_MULDI3
	select GENERIC_LIB_CMPDI2
	select GENERIC_LIB_UCMPDI2
	select GENERIC_ALLOCATOR
	select GENERIC_ATOMIC64
	select GENERIC_CLOCKEVENTS
	select GENERIC_CPU_DEVICES
	select GENERIC_IRQ_CHIP
	select GENERIC_IRQ_PROBE
	select GENERIC_IRQ_SHOW
	select GENERIC_IRQ_MULTI_HANDLER
	select GENERIC_SCHED_CLOCK
	select GENERIC_SMP_IDLE_THREAD
	select GX6605S_TIMER if CPU_CK610
	select HAVE_ARCH_TRACEHOOK
	select HAVE_ARCH_AUDITSYSCALL
	select HAVE_ARCH_MMAP_RND_BITS
	select HAVE_ARCH_SECCOMP_FILTER
	select HAVE_CONTEXT_TRACKING
	select HAVE_VIRT_CPU_ACCOUNTING_GEN
	select HAVE_DEBUG_BUGVERBOSE
	select HAVE_DYNAMIC_FTRACE
	select HAVE_DYNAMIC_FTRACE_WITH_REGS
	select HAVE_FUNCTION_TRACER
	select HAVE_FUNCTION_GRAPH_TRACER
	select HAVE_FUNCTION_ERROR_INJECTION
	select HAVE_FTRACE_MCOUNT_RECORD
	select HAVE_KERNEL_GZIP
	select HAVE_KERNEL_LZO
	select HAVE_KERNEL_LZMA
	select HAVE_KPROBES if !CPU_CK610
	select HAVE_KPROBES_ON_FTRACE if !CPU_CK610
	select HAVE_KRETPROBES if !CPU_CK610
	select HAVE_PERF_EVENTS
	select HAVE_PERF_REGS
	select HAVE_PERF_USER_STACK_DUMP
	select HAVE_DMA_CONTIGUOUS
	select HAVE_REGS_AND_STACK_ACCESS_API
	select HAVE_RSEQ
	select HAVE_STACKPROTECTOR
	select HAVE_SYSCALL_TRACEPOINTS
	select MAY_HAVE_SPARSE_IRQ
	select MODULES_USE_ELF_RELA if MODULES
	select OF
	select OF_EARLY_FLATTREE
	select PERF_USE_VMALLOC if CPU_CK610
	select RTC_LIB
	select TIMER_OF
	select USB_ARCH_HAS_EHCI
	select USB_ARCH_HAS_OHCI
	select GENERIC_PCI_IOMAP
	select HAVE_PCI
	select PCI_DOMAINS_GENERIC if PCI
	select PCI_SYSCALL if PCI
	select PCI_MSI if PCI

config LOCKDEP_SUPPORT
	def_bool y

config ARCH_SUPPORTS_UPROBES
	def_bool y if !CPU_CK610

config CPU_HAS_CACHEV2
	bool

config CPU_HAS_FPUV2
	bool

config CPU_HAS_HILO
	bool

config CPU_HAS_TLBI
	bool

config CPU_HAS_LDSTEX
	bool
	help
	  For SMP, CPU needs "ldex&stex" instructions for atomic operations.

config CPU_NEED_TLBSYNC
	bool

config CPU_NEED_SOFTALIGN
	bool

config CPU_NO_USER_BKPT
	bool
	help
	  For abiv2 we couldn't use "trap 1" as user space bkpt in gdbserver, because
	  abiv2 is 16/32bit instruction set and "trap 1" is 32bit.
	  So we need a 16bit instruction as user space bkpt, and it will cause an illegal
	  instruction exception.
	  In kernel we parse the *regs->pc to determine whether to send SIGTRAP or not.

config GENERIC_CALIBRATE_DELAY
	def_bool y

config GENERIC_CSUM
	def_bool y

config GENERIC_HWEIGHT
	def_bool y

config MMU
	def_bool y

config STACKTRACE_SUPPORT
	def_bool y

config TIME_LOW_RES
	def_bool y

config TRACE_IRQFLAGS_SUPPORT
	def_bool y

config CPU_TLB_SIZE
	int
	default "128"	if (CPU_CK610 || CPU_CK807 || CPU_CK810)
	default "1024"	if (CPU_CK860)

config CPU_ASID_BITS
	int
	default "8"	if (CPU_CK610 || CPU_CK807 || CPU_CK810)
	default "12"	if (CPU_CK860)

config L1_CACHE_SHIFT
	int
	default "4"	if (CPU_CK610)
	default "5"	if (CPU_CK807 || CPU_CK810)
	default "6"	if (CPU_CK860)

config ARCH_MMAP_RND_BITS_MIN
	default 8

# max bits determined by the following formula:
#  VA_BITS - PAGE_SHIFT - 3
config ARCH_MMAP_RND_BITS_MAX
	default 17

menu "Processor type and features"

choice
	prompt "CPU MODEL"
	default CPU_CK807

config CPU_CK610
	bool "CSKY CPU ck610"
	select CPU_NEED_TLBSYNC
	select CPU_NEED_SOFTALIGN
	select CPU_NO_USER_BKPT

config CPU_CK810
	bool "CSKY CPU ck810"
	select CPU_HAS_HILO
	select CPU_NEED_TLBSYNC

config CPU_CK807
	bool "CSKY CPU ck807"
	select CPU_HAS_HILO

config CPU_CK860
	bool "CSKY CPU ck860"
	select CPU_HAS_TLBI
	select CPU_HAS_CACHEV2
	select CPU_HAS_LDSTEX
	select CPU_HAS_FPUV2
endchoice

choice
	prompt "C-SKY PMU type"
	depends on PERF_EVENTS
	depends on CPU_CK807 || CPU_CK810 || CPU_CK860

config CPU_PMU_NONE
	bool "None"

config CSKY_PMU_V1
	bool "Performance Monitoring Unit Ver.1"

endchoice

choice
	prompt "Power Manager Instruction (wait/doze/stop)"
	default CPU_PM_NONE

config CPU_PM_NONE
	bool "None"

config CPU_PM_WAIT
	bool "wait"

config CPU_PM_DOZE
	bool "doze"

config CPU_PM_STOP
	bool "stop"
endchoice

menuconfig HAVE_TCM
	bool "Tightly-Coupled/Sram Memory"
	select GENERIC_ALLOCATOR
	help
	  The implementation are not only used by TCM (Tightly-Coupled Meory)
	  but also used by sram on SOC bus. It follow existed linux tcm
	  software interface, so that old tcm application codes could be
	  re-used directly.

if HAVE_TCM
config ITCM_RAM_BASE
	hex "ITCM ram base"
	default 0xffffffff

config ITCM_NR_PAGES
	int "Page count of ITCM size: NR*4KB"
	range 1 256
	default 32

config HAVE_DTCM
	bool "DTCM Support"

config DTCM_RAM_BASE
	hex "DTCM ram base"
	depends on HAVE_DTCM
	default 0xffffffff

config DTCM_NR_PAGES
	int "Page count of DTCM size: NR*4KB"
	depends on HAVE_DTCM
	range 1 256
	default 32
endif

config CPU_HAS_VDSP
	bool "CPU has VDSP coprocessor"
	depends on CPU_HAS_FPU && CPU_HAS_FPUV2

config CPU_HAS_FPU
	bool "CPU has FPU coprocessor"
	depends on CPU_CK807 || CPU_CK810 || CPU_CK860

config CPU_HAS_ICACHE_INS
	bool "CPU has Icache invalidate instructions"
	depends on CPU_HAS_CACHEV2

config CPU_HAS_TEE
	bool "CPU has Trusted Execution Environment"
	depends on CPU_CK810

config SMP
	bool "Symmetric Multi-Processing (SMP) support for C-SKY"
	depends on CPU_CK860
	default n

config NR_CPUS
	int "Maximum number of CPUs (2-32)"
	range 2 32
	depends on SMP
	default "4"

config HIGHMEM
	bool "High Memory Support"
	depends on !CPU_CK610
	default y

config FORCE_MAX_ZONEORDER
	int "Maximum zone order"
	default "11"

config RAM_BASE
	hex "DRAM start addr (the same with memory-section in dts)"
	default 0x0

config HOTPLUG_CPU
	bool "Support for hot-pluggable CPUs"
	select GENERIC_IRQ_MIGRATION
	depends on SMP
	help
	  Say Y here to allow turning CPUs off and on. CPUs can be
	  controlled through /sys/devices/system/cpu/cpu1/hotplug/target.

	  Say N if you want to disable CPU hotplug.
endmenu

source "arch/csky/Kconfig.platforms"

source "kernel/Kconfig.hz"

config SECCOMP
	bool "Enable seccomp to safely compute untrusted bytecode"
	help
	  This kernel feature is useful for number crunching applications
	  that may need to compute untrusted bytecode during their
	  execution. By using pipes or other transports made available to
	  the process as file descriptors supporting the read/write
	  syscalls, it's possible to isolate those applications in
	  their own address space using seccomp. Once seccomp is
	  enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
	  and the task is only allowed to execute a few safe syscalls
	  defined by each seccomp mode.