ARM: dma-mapping: provide per-cpu type map/unmap functions

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-By: Santosh Shilimkar <santosh.shilimkar@ti.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/arch/arm/mm/cache-v4wb.S b/arch/arm/mm/cache-v4wb.S
index 3dbedf1ec0e7..32e7a7448496 100644
--- a/arch/arm/mm/cache-v4wb.S
+++ b/arch/arm/mm/cache-v4wb.S
@@ -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
@@ -226,6 +250,8 @@ ENTRY(v4wb_cache_fns)
         .long   v4wb_coherent_kern_range
         .long   v4wb_coherent_user_range
         .long   v4wb_flush_kern_dcache_area
+        .long   v4wb_dma_map_area
+        .long   v4wb_dma_unmap_area
         .long   v4wb_dma_inv_range
         .long   v4wb_dma_clean_range
         .long   v4wb_dma_flush_range