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SubjectRe: [PATCH V2 01/19] csky: Build infrastructure
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On 07/01/18 10:30, Guo Ren wrote:
> Signed-off-by: Guo Ren <ren_guo@c-sky.com>
> ---

Hi,
Just a few comments...

>
> diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig
> new file mode 100644
> index 0000000..cfeb312
> --- /dev/null
> +++ b/arch/csky/Kconfig
> @@ -0,0 +1,211 @@
> +config CSKY
> + bool
> + default y

shorter:
def_bool y

> + select ARCH_USE_BUILTIN_BSWAP
> + select COMMON_CLK
> + select CLKSRC_MMIO
> + select CLKSRC_OF
> + select IRQ_DOMAIN
> + select HANDLE_DOMAIN_IRQ
> + select DW_APB_TIMER_OF
> + select GENERIC_ATOMIC64
> + select GENERIC_CLOCKEVENTS
> + select GENERIC_CPU_DEVICES
> + select GENERIC_IRQ_CHIP
> + select GENERIC_IRQ_PROBE
> + select GENERIC_IRQ_SHOW
> + select GENERIC_SCHED_CLOCK
> + select GENERIC_SMP_IDLE_THREAD
> + select HAVE_ARCH_TRACEHOOK
> + select HAVE_GENERIC_DMA_COHERENT
> + select HAVE_KERNEL_GZIP
> + select HAVE_KERNEL_LZO
> + select HAVE_KERNEL_LZMA
> + select HAVE_PERF_EVENTS
> + select HAVE_C_RECORDMCOUNT
> + select HAVE_KPROBES
> + select HAVE_KRETPROBES
> + select HAVE_DMA_API_DEBUG
> + select HAVE_MEMBLOCK
> + select MAY_HAVE_SPARSE_IRQ
> + select MODULES_USE_ELF_RELA if MODULES
> + select NO_BOOTMEM
> + select OF
> + select OF_EARLY_FLATTREE
> + select OF_RESERVED_MEM
> + select PERF_USE_VMALLOC
> + select RTC_LIB
> + select TIMER_OF
> + select USB_ARCH_HAS_EHCI
> + select USB_ARCH_HAS_OHCI
> +
> +config CPU_HAS_CACHEV2
> + bool
> +
> +config CPU_HAS_HILO
> + bool
> +
> +config CPU_HAS_TLBI
> + bool
> +
> +config CPU_HAS_LDSTEX
> + bool
> + help
> + For SMP cpu need "ldex&stex" instrcutions to keep atomic.

For SMP, CPU needs 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 a illegal

cause an illegal

> + instruction exception.
> + In kernel we parse the *regs->pc to determine wether send SIGTRAP or not.

whether to send

> +
> +config GENERIC_CALIBRATE_DELAY
> + bool
> + default y

def_bool y

> +
> +config HZ
> + int
> + default 100
> +
> +config GENERIC_CSUM
> + bool
> + default y

def_bool y

> +
> +config GENERIC_HWEIGHT
> + bool
> + default y

def_bool y

> +
> +config MMU
> + bool
> + default y

same.

> +
> +config RWSEM_GENERIC_SPINLOCK
> + bool
> + default y

same.

> +
> +config TIME_LOW_RES
> + bool
> + default y

again.

> +
> +config TRACE_IRQFLAGS_SUPPORT
> + bool
> + default y

again.

> +
> +source "init/Kconfig"
> +
> +source "kernel/Kconfig.freezer"
> +
> +menu "Processor type and features"
> +
> +comment "Processor type"
> +
> +choice
> + prompt "CPU MODEL"
> + default CPU_CK610
> +
> +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
> +endchoice
> +
> +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)

prefer a space after "if" on all those lines above.

> +
> +config HIGHMEM
> + bool "High Memory Support"
> + depends on !CPU_CK610
> + default y
> +
> +menuconfig CPU_HAS_FPU
> + bool "CPU has FPU coprocessor"
> + depends on CPU_CK807 || CPU_CK810 || CPU_CK860
> +
> +menuconfig 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"
> +
> +comment "*****System type*****"
> +
> +config RAM_BASE
> + hex "It must be the same with the memory section in your dts"
> + default 0x0
> +endmenu
> +
> +menu "Power management options"
> +
> +source "kernel/power/Kconfig"
> +
> +config ARCH_SUSPEND_POSSIBLE
> + bool
> + default y

shorter:
def_bool y

> +endmenu
> +
> +source "mm/Kconfig"
> +
> +source "fs/Kconfig.binfmt"
> +
> +source "kernel/Kconfig.preempt"
> +
> +source "net/Kconfig"
> +
> +source "drivers/Kconfig"
> +
> +source "fs/Kconfig"
> +
> +source "arch/csky/Kconfig.debug"
> +
> +source "security/Kconfig"
> +
> +source "crypto/Kconfig"
> +
> +source "lib/Kconfig"
> diff --git a/arch/csky/Kconfig.debug b/arch/csky/Kconfig.debug
> new file mode 100644
> index 0000000..6978702
> --- /dev/null
> +++ b/arch/csky/Kconfig.debug
> @@ -0,0 +1,29 @@
> +menu "Kernel hacking"
> +
> +menu "C-SKY Debug Options"
> +config CSKY_DEBUG_INFO
> + bool "Compile the kernel with debug info, just add -g"
> + depends on !DEBUG_INFO
> + help
> + DEBUG_INFO and COMPILE_TEST is conflict, so we provide
> + another way to support -g.
> + Some drivers eg: DW_MMC need COMPILE_TEST for new cpu
> + arch :(
> +
> +config CSKY_VECIRQ_LEGENCY
> + bool "Use legency IRQ vector for interrupt, it's for SOC bugfix."

legacy

> + help
> + It's a deprecated method for arch/csky. Don't use it, unless your
> + SOC has bug.
> +
> +config CSKY_BUILTIN_DTB
> + bool "Use kernel builtin dtb"
> +
> +config CSKY_BUILTIN_DTB_NAME
> + string "kernel builtin dtb name"
> + depends on CSKY_BUILTIN_DTB
> +endmenu
> +
> +source "lib/Kconfig.debug"
> +
> +endmenu


--
~Randy

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