diff options
Diffstat (limited to 'arch/arm/mm/flush.c')
| -rw-r--r-- | arch/arm/mm/flush.c | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c index b0208c992576..c9a03981b785 100644 --- a/arch/arm/mm/flush.c +++ b/arch/arm/mm/flush.c | |||
| @@ -17,6 +17,24 @@ | |||
| 17 | 17 | ||
| 18 | #ifdef CONFIG_CPU_CACHE_VIPT | 18 | #ifdef CONFIG_CPU_CACHE_VIPT |
| 19 | 19 | ||
| 20 | #define ALIAS_FLUSH_START 0xffff4000 | ||
| 21 | |||
| 22 | #define TOP_PTE(x) pte_offset_kernel(top_pmd, x) | ||
| 23 | |||
| 24 | static void flush_pfn_alias(unsigned long pfn, unsigned long vaddr) | ||
| 25 | { | ||
| 26 | unsigned long to = ALIAS_FLUSH_START + (CACHE_COLOUR(vaddr) << PAGE_SHIFT); | ||
| 27 | |||
| 28 | set_pte(TOP_PTE(to), pfn_pte(pfn, PAGE_KERNEL)); | ||
| 29 | flush_tlb_kernel_page(to); | ||
| 30 | |||
| 31 | asm( "mcrr p15, 0, %1, %0, c14\n" | ||
| 32 | " mcrr p15, 0, %1, %0, c5\n" | ||
| 33 | : | ||
| 34 | : "r" (to), "r" (to + PAGE_SIZE - L1_CACHE_BYTES) | ||
| 35 | : "cc"); | ||
| 36 | } | ||
| 37 | |||
| 20 | void flush_cache_mm(struct mm_struct *mm) | 38 | void flush_cache_mm(struct mm_struct *mm) |
| 21 | { | 39 | { |
| 22 | if (cache_is_vivt()) { | 40 | if (cache_is_vivt()) { |
| @@ -67,24 +85,6 @@ void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsig | |||
| 67 | if (cache_is_vipt_aliasing()) | 85 | if (cache_is_vipt_aliasing()) |
| 68 | flush_pfn_alias(pfn, user_addr); | 86 | flush_pfn_alias(pfn, user_addr); |
| 69 | } | 87 | } |
| 70 | |||
| 71 | #define ALIAS_FLUSH_START 0xffff4000 | ||
| 72 | |||
| 73 | #define TOP_PTE(x) pte_offset_kernel(top_pmd, x) | ||
| 74 | |||
| 75 | static void flush_pfn_alias(unsigned long pfn, unsigned long vaddr) | ||
| 76 | { | ||
| 77 | unsigned long to = ALIAS_FLUSH_START + (CACHE_COLOUR(vaddr) << PAGE_SHIFT); | ||
| 78 | |||
| 79 | set_pte(TOP_PTE(to), pfn_pte(pfn, PAGE_KERNEL)); | ||
| 80 | flush_tlb_kernel_page(to); | ||
| 81 | |||
| 82 | asm( "mcrr p15, 0, %1, %0, c14\n" | ||
| 83 | " mcrr p15, 0, %1, %0, c5\n" | ||
| 84 | : | ||
| 85 | : "r" (to), "r" (to + PAGE_SIZE - L1_CACHE_BYTES) | ||
| 86 | : "cc"); | ||
| 87 | } | ||
| 88 | #else | 88 | #else |
| 89 | #define flush_pfn_alias(pfn,vaddr) do { } while (0) | 89 | #define flush_pfn_alias(pfn,vaddr) do { } while (0) |
| 90 | #endif | 90 | #endif |
