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[ARM] armv7: add support for asid-tagged VIVT I-cache

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ARMv7 can have VIPT, PIPT or ASID-tagged VIVT I-cache. This patch
adds the necessary invalidation of the I-cache when the ASID numbers
are re-used.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Catalin Marinas
2007-05-09 09:50:23 +01:00
committed by Russell King
parent 56163fcf19
commit 065cf519c3
2 changed files with 22 additions and 0 deletions
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15
include/asm-arm/cacheflush.h
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@@ -438,6 +438,7 @@ static inline void flush_anon_page(struct vm_area_struct *vma,
#define __cacheid_vipt(val) (__cacheid_type_v7(val) ? 1 : __cacheid_vipt_prev7(val))
#define __cacheid_vipt_nonaliasing(val) (__cacheid_type_v7(val) ? 1 : __cacheid_vipt_nonaliasing_prev7(val))
#define __cacheid_vipt_aliasing(val) (__cacheid_type_v7(val) ? 0 : __cacheid_vipt_aliasing_prev7(val))
#define __cacheid_vivt_asid_tagged_instr(val) (__cacheid_type_v7(val) ? ((val & (3 << 14)) == (1 << 14)) : 0)
#if defined(CONFIG_CPU_CACHE_VIVT) && !defined(CONFIG_CPU_CACHE_VIPT)
@@ -445,6 +446,7 @@ static inline void flush_anon_page(struct vm_area_struct *vma,
#define cache_is_vipt() 0
#define cache_is_vipt_nonaliasing() 0
#define cache_is_vipt_aliasing() 0
#define icache_is_vivt_asid_tagged() 0
#elif defined(CONFIG_CPU_CACHE_VIPT)
@@ -462,6 +464,12 @@ static inline void flush_anon_page(struct vm_area_struct *vma,
__cacheid_vipt_aliasing(__val); \
})
#define icache_is_vivt_asid_tagged() \
({ \
unsigned int __val = read_cpuid(CPUID_CACHETYPE); \
__cacheid_vivt_asid_tagged_instr(__val); \
})
#else
#define cache_is_vivt() \
@@ -490,6 +498,13 @@ static inline void flush_anon_page(struct vm_area_struct *vma,
__cacheid_vipt_aliasing(__val); \
})
#define icache_is_vivt_asid_tagged() \
({ \
unsigned int __val = read_cpuid(CPUID_CACHETYPE); \
__cacheid_present(__val) && \
__cacheid_vivt_asid_tagged_instr(__val); \
})
#endif
#endif