1 files changed, 312 insertions, 0 deletions
diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig
new file mode 100644
index 000000000..7bf0a617e
--- /dev/null
+++ b/arch/csky/Kconfig
@@ -0,0 +1,312 @@
+# 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
+	select SET_FS
+
+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 DRAM_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"