diff options
Diffstat (limited to 'arch/arm/mm/cache-v4.S')
| -rw-r--r-- | arch/arm/mm/cache-v4.S | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/arch/arm/mm/cache-v4.S b/arch/arm/mm/cache-v4.S index a8fefb523f1..7824cf6e14a 100644 --- a/arch/arm/mm/cache-v4.S +++ b/arch/arm/mm/cache-v4.S @@ -103,6 +103,20 @@ ENTRY(v4_flush_kern_dcache_area) /* FALLTHROUGH */ /* + * dma_inv_range(start, end) + * + * Invalidate (discard) the specified virtual address range. + * May not write back any entries. If 'start' or 'end' + * are not cache line aligned, those lines must be written + * back. + * + * - start - virtual start address + * - end - virtual end address + */ +ENTRY(v4_dma_inv_range) + /* FALLTHROUGH */ + +/* * dma_flush_range(start, end) * * Clean and invalidate the specified virtual address range. @@ -115,6 +129,17 @@ ENTRY(v4_dma_flush_range) mov r0, #0 mcr p15, 0, r0, c7, c7, 0 @ flush ID cache #endif + /* FALLTHROUGH */ + +/* + * dma_clean_range(start, end) + * + * Clean (write back) the specified virtual address range. + * + * - start - virtual start address + * - end - virtual end address + */ +ENTRY(v4_dma_clean_range) mov pc, lr /* @@ -125,7 +150,7 @@ ENTRY(v4_dma_flush_range) */ ENTRY(v4_dma_unmap_area) teq r2, #DMA_TO_DEVICE - bne v4_dma_flush_range + bne v4_dma_inv_range /* FALLTHROUGH */ /* @@ -152,5 +177,7 @@ ENTRY(v4_cache_fns) .long v4_flush_kern_dcache_area .long v4_dma_map_area .long v4_dma_unmap_area + .long v4_dma_inv_range + .long v4_dma_clean_range .long v4_dma_flush_range .size v4_cache_fns, . - v4_cache_fns |