aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mm/cache-v4wb.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mm/cache-v4wb.S')
-rw-r--r--arch/arm/mm/cache-v4wb.S32
1 files changed, 28 insertions, 4 deletions
diff --git a/arch/arm/mm/cache-v4wb.S b/arch/arm/mm/cache-v4wb.S
index 3dbedf1ec0e..df8368afa10 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