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[ARM] ARMv6: add CPU_HAS_ASID configuration

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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 <[email protected]>
This commit is contained in:
Russell King 2007-05-17 10:19:23 +01:00 • committed by Russell King
commit 516793c61b
4 changed files with 12 additions and 4 deletions
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4
include/asm-arm/mmu.h
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@ -4,13 +4,13 @@
#ifdef CONFIG_MMU
typedef struct {
#if __LINUX_ARM_ARCH__ >= 6
#ifdef CONFIG_CPU_HAS_ASID
unsigned int id;
#endif
unsigned int kvm_seq;
} mm_context_t;
#if __LINUX_ARM_ARCH__ >= 6
#ifdef CONFIG_CPU_HAS_ASID
#define ASID(mm) ((mm)->context.id & 255)
#else
#define ASID(mm) (0)

2
include/asm-arm/mmu_context.h
View file

@ -20,7 +20,7 @@
void __check_kvm_seq(struct mm_struct *mm);
#if __LINUX_ARM_ARCH__ >= 6
#ifdef CONFIG_CPU_HAS_ASID
/*
* On ARMv6, we have the following structure in the Context ID: