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author | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-07-02 14:46:27 +0100 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-01-26 20:06:14 +0000 |
commit | de27c308223dc9bd48de9742c7c2b53a15c1b012 (patch) | |
tree | d32acbc71110b1e727abd80620f95f14565b6031 /arch/arm/mm/mm.h | |
parent | dcd6c92267155e70a94b3927bce681ce74b80d1f (diff) | |
download | linux-de27c308223dc9bd48de9742c7c2b53a15c1b012.tar.bz2 |
ARM: pgtable: move TOP_PTE address definitions to arch/arm/mm/mm.h
Move the TOP_PTE address definitions to one central place so that it's
easy to discover what they're being used for. This helps to ensure
that there are no overlaps.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/mm.h')
-rw-r--r-- | arch/arm/mm/mm.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm/mm/mm.h b/arch/arm/mm/mm.h index 70f6d3ea4834..6ee1ff2c1da6 100644 --- a/arch/arm/mm/mm.h +++ b/arch/arm/mm/mm.h @@ -5,6 +5,19 @@ extern pmd_t *top_pmd; #define TOP_PTE(x) pte_offset_kernel(top_pmd, x) +/* + * 0xffff8000 to 0xffffffff is reserved for any ARM architecture + * specific hacks for copying pages efficiently, while 0xffff4000 + * is reserved for VIPT aliasing flushing by generic code. + * + * Note that we don't allow VIPT aliasing caches with SMP. + */ +#define COPYPAGE_MINICACHE 0xffff8000 +#define COPYPAGE_V6_FROM 0xffff8000 +#define COPYPAGE_V6_TO 0xffffc000 +/* PFN alias flushing, for VIPT caches */ +#define FLUSH_ALIAS_START 0xffff4000 + static inline pmd_t *pmd_off_k(unsigned long virt) { return pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt); |