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 b0208c99257..c9a03981b78 100644 --- a/arch/arm/mm/flush.c +++ b/arch/arm/mm/flush.c @@ -17,6 +17,24 @@ #ifdef CONFIG_CPU_CACHE_VIPT +#define ALIAS_FLUSH_START 0xffff4000 + +#define TOP_PTE(x) pte_offset_kernel(top_pmd, x) + +static void flush_pfn_alias(unsigned long pfn, unsigned long vaddr) +{ + unsigned long to = ALIAS_FLUSH_START + (CACHE_COLOUR(vaddr) << PAGE_SHIFT); + + set_pte(TOP_PTE(to), pfn_pte(pfn, PAGE_KERNEL)); + flush_tlb_kernel_page(to); + + asm( "mcrr p15, 0, %1, %0, c14\n" + " mcrr p15, 0, %1, %0, c5\n" + : + : "r" (to), "r" (to + PAGE_SIZE - L1_CACHE_BYTES) + : "cc"); +} + void flush_cache_mm(struct mm_struct *mm) { if (cache_is_vivt()) { @@ -67,24 +85,6 @@ void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsig if (cache_is_vipt_aliasing()) flush_pfn_alias(pfn, user_addr); } - -#define ALIAS_FLUSH_START 0xffff4000 - -#define TOP_PTE(x) pte_offset_kernel(top_pmd, x) - -static void flush_pfn_alias(unsigned long pfn, unsigned long vaddr) -{ - unsigned long to = ALIAS_FLUSH_START + (CACHE_COLOUR(vaddr) << PAGE_SHIFT); - - set_pte(TOP_PTE(to), pfn_pte(pfn, PAGE_KERNEL)); - flush_tlb_kernel_page(to); - - asm( "mcrr p15, 0, %1, %0, c14\n" - " mcrr p15, 0, %1, %0, c5\n" - : - : "r" (to), "r" (to + PAGE_SIZE - L1_CACHE_BYTES) - : "cc"); -} #else #define flush_pfn_alias(pfn,vaddr) do { } while (0) #endif |