diff options
Diffstat (limited to 'arch/arm/mm/cache-fa.S')
-rw-r--r-- | arch/arm/mm/cache-fa.S | 43 |
1 files changed, 34 insertions, 9 deletions
diff --git a/arch/arm/mm/cache-fa.S b/arch/arm/mm/cache-fa.S index b63a8f7b95c..7148e53e607 100644 --- a/arch/arm/mm/cache-fa.S +++ b/arch/arm/mm/cache-fa.S @@ -127,15 +127,16 @@ ENTRY(fa_coherent_user_range) mov pc, lr /* - * flush_kern_dcache_page(kaddr) + * flush_kern_dcache_area(void *addr, size_t size) * * Ensure that the data held in the page kaddr is written back * to the page in question. * - * - kaddr - kernel address (guaranteed to be page aligned) + * - addr - kernel address + * - size - size of region */ -ENTRY(fa_flush_kern_dcache_page) - add r1, r0, #PAGE_SZ +ENTRY(fa_flush_kern_dcache_area) + add r1, r0, r1 1: mcr p15, 0, r0, c7, c14, 1 @ clean & invalidate D line add r0, r0, #CACHE_DLINESIZE cmp r0, r1 @@ -156,7 +157,7 @@ ENTRY(fa_flush_kern_dcache_page) * - start - virtual start address * - end - virtual end address */ -ENTRY(fa_dma_inv_range) +fa_dma_inv_range: tst r0, #CACHE_DLINESIZE - 1 bic r0, r0, #CACHE_DLINESIZE - 1 mcrne p15, 0, r0, c7, c14, 1 @ clean & invalidate D entry @@ -179,7 +180,7 @@ ENTRY(fa_dma_inv_range) * - start - virtual start address * - end - virtual end address */ -ENTRY(fa_dma_clean_range) +fa_dma_clean_range: bic r0, r0, #CACHE_DLINESIZE - 1 1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry add r0, r0, #CACHE_DLINESIZE @@ -204,6 +205,30 @@ ENTRY(fa_dma_flush_range) mcr p15, 0, r0, c7, c10, 4 @ drain write buffer mov pc, lr +/* + * dma_map_area(start, size, dir) + * - start - kernel virtual start address + * - size - size of region + * - dir - DMA direction + */ +ENTRY(fa_dma_map_area) + add r1, r1, r0 + cmp r2, #DMA_TO_DEVICE + beq fa_dma_clean_range + bcs fa_dma_inv_range + b fa_dma_flush_range +ENDPROC(fa_dma_map_area) + +/* + * dma_unmap_area(start, size, dir) + * - start - kernel virtual start address + * - size - size of region + * - dir - DMA direction + */ +ENTRY(fa_dma_unmap_area) + mov pc, lr +ENDPROC(fa_dma_unmap_area) + __INITDATA .type fa_cache_fns, #object @@ -213,8 +238,8 @@ ENTRY(fa_cache_fns) .long fa_flush_user_cache_range .long fa_coherent_kern_range .long fa_coherent_user_range - .long fa_flush_kern_dcache_page - .long fa_dma_inv_range - .long fa_dma_clean_range + .long fa_flush_kern_dcache_area + .long fa_dma_map_area + .long fa_dma_unmap_area .long fa_dma_flush_range .size fa_cache_fns, . - fa_cache_fns |