From 516793c61b3db1f60e0b0d0e3c382bcca9ae84fd Mon Sep 17 00:00:00 2001 From: Russell King Date: Thu, 17 May 2007 10:19:23 +0100 Subject: [ARM] ARMv6: add CPU_HAS_ASID configuration Presently, we check for the minimum ARM architecture that we're building for to determine whether we need ASID support. This is wrong - if we're going to support a range of CPUs which include ARMv6 or higher, we need the ASID. Convert the checks to use a new configuration symbol, and arrange for ARMv6 and higher CPU entries to select it. Signed-off-by: Russell King --- arch/arm/kernel/asm-offsets.c | 2 +- arch/arm/mm/Kconfig | 8 ++++++++ 2 files changed, 9 insertions(+), 1 deletion(-) (limited to 'arch') diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c index 3c078e34675..3278e713c32 100644 --- a/arch/arm/kernel/asm-offsets.c +++ b/arch/arm/kernel/asm-offsets.c @@ -85,7 +85,7 @@ int main(void) DEFINE(S_OLD_R0, offsetof(struct pt_regs, ARM_ORIG_r0)); DEFINE(S_FRAME_SIZE, sizeof(struct pt_regs)); BLANK(); -#if __LINUX_ARM_ARCH__ >= 6 +#ifdef CONFIG_CPU_HAS_ASID DEFINE(MM_CONTEXT_ID, offsetof(struct mm_struct, context.id)); BLANK(); #endif diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index 15f0284010c..5f472a8b406 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -351,6 +351,7 @@ config CPU_V6 select CPU_CACHE_V6 select CPU_CACHE_VIPT select CPU_CP15_MMU + select CPU_HAS_ASID select CPU_COPY_V6 if MMU select CPU_TLB_V6 if MMU @@ -376,6 +377,7 @@ config CPU_V7 select CPU_CACHE_V7 select CPU_CACHE_VIPT select CPU_CP15_MMU + select CPU_HAS_ASID select CPU_COPY_V6 if MMU select CPU_TLB_V6 if MMU @@ -498,6 +500,12 @@ config CPU_TLB_V6 endif +config CPU_HAS_ASID + bool + help + This indicates whether the CPU has the ASID register; used to + tag TLB and possibly cache entries. + config CPU_CP15 bool help -- cgit v1.2.3