diff options
Diffstat (limited to 'arch/arm/mm/cache-v4wb.S')
| -rw-r--r-- | arch/arm/mm/cache-v4wb.S | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/arch/arm/mm/cache-v4wb.S b/arch/arm/mm/cache-v4wb.S index 3dbedf1ec0e7..df8368afa102 100644 --- a/arch/arm/mm/cache-v4wb.S +++ b/arch/arm/mm/cache-v4wb.S @@ -173,7 +173,7 @@ ENTRY(v4wb_coherent_user_range) * - start - virtual start address * - end - virtual end address */ -ENTRY(v4wb_dma_inv_range) +v4wb_dma_inv_range: tst r0, #CACHE_DLINESIZE - 1 bic r0, r0, #CACHE_DLINESIZE - 1 mcrne p15, 0, r0, c7, c10, 1 @ clean D entry @@ -194,7 +194,7 @@ ENTRY(v4wb_dma_inv_range) * - start - virtual start address * - end - virtual end address */ -ENTRY(v4wb_dma_clean_range) +v4wb_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 @@ -216,6 +216,30 @@ ENTRY(v4wb_dma_clean_range) .globl v4wb_dma_flush_range .set v4wb_dma_flush_range, v4wb_coherent_kern_range +/* + * dma_map_area(start, size, dir) + * - start - kernel virtual start address + * - size - size of region + * - dir - DMA direction + */ +ENTRY(v4wb_dma_map_area) + add r1, r1, r0 + cmp r2, #DMA_TO_DEVICE + beq v4wb_dma_clean_range + bcs v4wb_dma_inv_range + b v4wb_dma_flush_range +ENDPROC(v4wb_dma_map_area) + +/* + * dma_unmap_area(start, size, dir) + * - start - kernel virtual start address + * - size - size of region + * - dir - DMA direction + */ +ENTRY(v4wb_dma_unmap_area) + mov pc, lr +ENDPROC(v4wb_dma_unmap_area) + __INITDATA .type v4wb_cache_fns, #object @@ -226,7 +250,7 @@ ENTRY(v4wb_cache_fns) .long v4wb_coherent_kern_range .long v4wb_coherent_user_range .long v4wb_flush_kern_dcache_area - .long v4wb_dma_inv_range - .long v4wb_dma_clean_range + .long v4wb_dma_map_area + .long v4wb_dma_unmap_area .long v4wb_dma_flush_range .size v4wb_cache_fns, . - v4wb_cache_fns |