From e399b1a4e1d205bdc816cb550d2064f2eb1ddc4c Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 17 Jan 2011 15:08:32 +0000 Subject: ARM: v6k: introduce CPU_V6K option Introduce a CPU_V6K configuration option for platforms to select if they have a V6K CPU core. This allows us to identify whether we need to support ARMv6 CPUs without the V6K SMP extensions at build time. Currently CPU_V6K is just an alias for CPU_V6, and all places which reference CPU_V6 are replaced by (CPU_V6 || CPU_V6K). Select CPU_V6K from platforms which are known to be V6K-only. Acked-by: Tony Lindgren Tested-by: Sourav Poddar Tested-by: Will Deacon Signed-off-by: Russell King --- arch/arm/Kconfig | 10 ++++----- arch/arm/Makefile | 1 + arch/arm/boot/compressed/head.S | 2 +- arch/arm/boot/compressed/misc.c | 2 +- arch/arm/include/asm/cacheflush.h | 5 +++-- arch/arm/include/asm/proc-fns.h | 2 +- arch/arm/kernel/debug.S | 2 +- arch/arm/kernel/perf_event_v6.c | 4 ++-- arch/arm/mm/Kconfig | 47 +++++++++++++++++++++++++-------------- arch/arm/mm/Makefile | 1 + arch/arm/mm/mmap.c | 2 +- 11 files changed, 47 insertions(+), 31 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 5cff165b7eb0..95ba92ff0d41 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -24,7 +24,7 @@ config ARM select HAVE_PERF_EVENTS select PERF_USE_VMALLOC select HAVE_REGS_AND_STACK_ACCESS_API - select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V7)) + select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7)) select HAVE_C_RECORDMCOUNT select HAVE_GENERIC_HARDIRQS select HAVE_SPARSE_IRQ @@ -1048,7 +1048,7 @@ config XSCALE_PMU default y config CPU_HAS_PMU - depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \ + depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \ (!ARCH_OMAP3 || OMAP3_EMU) default y bool @@ -1064,7 +1064,7 @@ endif config ARM_ERRATA_411920 bool "ARM errata: Invalidation of the Instruction Cache operation can fail" - depends on CPU_V6 + depends on CPU_V6 || CPU_V6K help Invalidation of the Instruction Cache operation can fail. This erratum is present in 1136 (before r1p4), 1156 and 1176. @@ -1361,7 +1361,7 @@ config HZ config THUMB2_KERNEL bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)" - depends on CPU_V7 && !CPU_V6 && EXPERIMENTAL + depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL select AEABI select ARM_ASM_UNIFIED help @@ -1852,7 +1852,7 @@ config FPE_FASTFPE config VFP bool "VFP-format floating point maths" - depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON + depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON help Say Y to include VFP support code in the kernel. This is needed if your hardware includes a VFP unit. diff --git a/arch/arm/Makefile b/arch/arm/Makefile index c22c1adfedd6..9c430525e13e 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -89,6 +89,7 @@ tune-$(CONFIG_CPU_XSCALE) :=$(call cc-option,-mtune=xscale,-mtune=strongarm110) tune-$(CONFIG_CPU_XSC3) :=$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale tune-$(CONFIG_CPU_FEROCEON) :=$(call cc-option,-mtune=marvell-f,-mtune=xscale) tune-$(CONFIG_CPU_V6) :=$(call cc-option,-mtune=arm1136j-s,-mtune=strongarm) +tune-$(CONFIG_CPU_V6K) :=$(call cc-option,-mtune=arm1136j-s,-mtune=strongarm) ifeq ($(CONFIG_AEABI),y) CFLAGS_ABI :=-mabi=aapcs-linux -mno-thumb-interwork diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index 7193884ed8b0..91f20f0b3044 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -21,7 +21,7 @@ #if defined(CONFIG_DEBUG_ICEDCC) -#ifdef CONFIG_CPU_V6 +#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) .macro loadsp, rb, tmp .endm .macro writeb, ch, rb diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c index e653a6d3c8d9..4657e877bf8f 100644 --- a/arch/arm/boot/compressed/misc.c +++ b/arch/arm/boot/compressed/misc.c @@ -36,7 +36,7 @@ extern void error(char *x); #ifdef CONFIG_DEBUG_ICEDCC -#ifdef CONFIG_CPU_V6 +#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) static void icedcc_putc(int ch) { diff --git a/arch/arm/include/asm/cacheflush.h b/arch/arm/include/asm/cacheflush.h index 3acd8fa25e34..7d0614f599a7 100644 --- a/arch/arm/include/asm/cacheflush.h +++ b/arch/arm/include/asm/cacheflush.h @@ -116,7 +116,7 @@ # define MULTI_CACHE 1 #endif -#if defined(CONFIG_CPU_V6) +#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) //# ifdef _CACHE # define MULTI_CACHE 1 //# else @@ -316,7 +316,8 @@ extern void copy_to_user_page(struct vm_area_struct *, struct page *, * Optimized __flush_icache_all for the common cases. Note that UP ARMv7 * will fall through to use __flush_icache_all_generic. */ -#if (defined(CONFIG_CPU_V7) && defined(CONFIG_CPU_V6)) || \ +#if (defined(CONFIG_CPU_V7) && \ + (defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K))) || \ defined(CONFIG_SMP_ON_UP) #define __flush_icache_preferred __cpuc_flush_icache_all #elif __LINUX_ARM_ARCH__ >= 7 && defined(CONFIG_SMP) diff --git a/arch/arm/include/asm/proc-fns.h b/arch/arm/include/asm/proc-fns.h index 8fdae9bc9abb..296ca47489f9 100644 --- a/arch/arm/include/asm/proc-fns.h +++ b/arch/arm/include/asm/proc-fns.h @@ -231,7 +231,7 @@ # endif #endif -#ifdef CONFIG_CPU_V6 +#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) # ifdef CPU_NAME # undef MULTI_CPU # define MULTI_CPU diff --git a/arch/arm/kernel/debug.S b/arch/arm/kernel/debug.S index a0f07521ca8a..d2d983be096d 100644 --- a/arch/arm/kernel/debug.S +++ b/arch/arm/kernel/debug.S @@ -25,7 +25,7 @@ .macro addruart, rp, rv .endm -#if defined(CONFIG_CPU_V6) +#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) .macro senduart, rd, rx mcr p14, 0, \rd, c0, c5, 0 diff --git a/arch/arm/kernel/perf_event_v6.c b/arch/arm/kernel/perf_event_v6.c index c058bfc8532b..6fc2d228db55 100644 --- a/arch/arm/kernel/perf_event_v6.c +++ b/arch/arm/kernel/perf_event_v6.c @@ -30,7 +30,7 @@ * enable the interrupt. */ -#ifdef CONFIG_CPU_V6 +#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) enum armv6_perf_types { ARMV6_PERFCTR_ICACHE_MISS = 0x0, ARMV6_PERFCTR_IBUF_STALL = 0x1, @@ -669,4 +669,4 @@ static const struct arm_pmu *__init armv6mpcore_pmu_init(void) { return NULL; } -#endif /* CONFIG_CPU_V6 */ +#endif /* CONFIG_CPU_V6 || CONFIG_CPU_V6K */ diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index 9d30c6f804b9..559e9330bb18 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -402,16 +402,18 @@ config CPU_V6 select CPU_TLB_V6 if MMU # ARMv6k -config CPU_32v6K - bool "Support ARM V6K processor extensions" if !SMP - depends on CPU_V6 || CPU_V7 - default y if SMP && !(ARCH_MX3 || ARCH_OMAP2) - help - Say Y here if your ARMv6 processor supports the 'K' extension. - This enables the kernel to use some instructions not present - on previous processors, and as such a kernel build with this - enabled will not boot on processors with do not support these - instructions. +config CPU_V6K + bool "Support ARM V6K processor" if ARCH_INTEGRATOR || MACH_REALVIEW_EB || MACH_REALVIEW_PBX || ARCH_DOVE + select CPU_32v6 + select CPU_32v6K if !ARCH_OMAP2 + select CPU_ABRT_EV6 + select CPU_PABRT_V6 + select CPU_CACHE_V6 + select CPU_CACHE_VIPT + select CPU_CP15_MMU + select CPU_HAS_ASID if MMU + select CPU_COPY_V6 if MMU + select CPU_TLB_V6 if MMU # ARMv7 config CPU_V7 @@ -453,6 +455,17 @@ config CPU_32v6 bool select TLS_REG_EMUL if !CPU_32v6K && !MMU +config CPU_32v6K + bool "Support ARM V6K processor extensions" if !SMP + depends on CPU_V6 || CPU_V6K || CPU_V7 + default y if SMP && !(ARCH_MX3 || ARCH_OMAP2) + help + Say Y here if your ARMv6 processor supports the 'K' extension. + This enables the kernel to use some instructions not present + on previous processors, and as such a kernel build with this + enabled will not boot on processors with do not support these + instructions. + config CPU_32v7 bool @@ -623,7 +636,7 @@ comment "Processor Features" config ARM_THUMB bool "Support Thumb user binaries" - depends on CPU_ARM720T || CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || CPU_ARM1020 || CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_V6 || CPU_V7 || CPU_FEROCEON + depends on CPU_ARM720T || CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || CPU_ARM1020 || CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_V6 || CPU_V6K || CPU_V7 || CPU_FEROCEON default y help Say Y if you want to include kernel support for running user space @@ -681,7 +694,7 @@ config CPU_BIG_ENDIAN config CPU_ENDIAN_BE8 bool depends on CPU_BIG_ENDIAN - default CPU_V6 || CPU_V7 + default CPU_V6 || CPU_V6K || CPU_V7 help Support for the BE-8 (big-endian) mode on ARMv6 and ARMv7 processors. @@ -747,7 +760,7 @@ config CPU_CACHE_ROUND_ROBIN config CPU_BPREDICT_DISABLE bool "Disable branch prediction" - depends on CPU_ARM1020 || CPU_V6 || CPU_MOHAWK || CPU_XSC3 || CPU_V7 || CPU_FA526 + depends on CPU_ARM1020 || CPU_V6 || CPU_V6K || CPU_MOHAWK || CPU_XSC3 || CPU_V7 || CPU_FA526 help Say Y here to disable branch prediction. If unsure, say N. @@ -767,7 +780,7 @@ config NEEDS_SYSCALL_FOR_CMPXCHG config DMA_CACHE_RWFO bool "Enable read/write for ownership DMA cache maintenance" - depends on CPU_V6 && SMP + depends on (CPU_V6 || CPU_V6K) && SMP default y help The Snoop Control Unit on ARM11MPCore does not detect the @@ -823,7 +836,7 @@ config CACHE_L2X0 config CACHE_PL310 bool depends on CACHE_L2X0 - default y if CPU_V7 && !CPU_V6 + default y if CPU_V7 && !(CPU_V6 || CPU_V6K) help This option enables optimisations for the PL310 cache controller. @@ -851,10 +864,10 @@ config ARM_L1_CACHE_SHIFT default 5 config ARM_DMA_MEM_BUFFERABLE - bool "Use non-cacheable memory for DMA" if CPU_V6 && !CPU_V7 + bool "Use non-cacheable memory for DMA" if (CPU_V6 || CPU_V6K) && !CPU_V7 depends on !(MACH_REALVIEW_PB1176 || REALVIEW_EB_ARM11MP || \ MACH_REALVIEW_PB11MP) - default y if CPU_V6 || CPU_V7 + default y if CPU_V6 || CPU_V6K || CPU_V7 help Historically, the kernel has used strongly ordered mappings to provide DMA coherent memory. With the advent of ARMv7, mapping diff --git a/arch/arm/mm/Makefile b/arch/arm/mm/Makefile index 00d74a04af3a..bca7e61928c7 100644 --- a/arch/arm/mm/Makefile +++ b/arch/arm/mm/Makefile @@ -90,6 +90,7 @@ obj-$(CONFIG_CPU_XSC3) += proc-xsc3.o obj-$(CONFIG_CPU_MOHAWK) += proc-mohawk.o obj-$(CONFIG_CPU_FEROCEON) += proc-feroceon.o obj-$(CONFIG_CPU_V6) += proc-v6.o +obj-$(CONFIG_CPU_V6K) += proc-v6.o obj-$(CONFIG_CPU_V7) += proc-v7.o AFLAGS_proc-v6.o :=-Wa,-march=armv6 diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c index b0a98305055c..afe209e1e1f8 100644 --- a/arch/arm/mm/mmap.c +++ b/arch/arm/mm/mmap.c @@ -31,7 +31,7 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr, struct mm_struct *mm = current->mm; struct vm_area_struct *vma; unsigned long start_addr; -#ifdef CONFIG_CPU_V6 +#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) unsigned int cache_type; int do_align = 0, aliasing = 0; -- cgit v1.2.3