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/proc-arm922.S b/arch/arm/mm/proc-arm922.S
index ee111b00fa41..4e4396b121ca 100644
--- a/arch/arm/mm/proc-arm922.S
+++ b/arch/arm/mm/proc-arm922.S
@@ -290,6 +290,30 @@ ENTRY(arm922_dma_flush_range)
         mcr     p15, 0, r0, c7, c10, 4          @ drain WB
         mov     pc, lr
 
+/*
+ *      dma_map_area(start, size, dir)
+ *      - start - kernel virtual start address
+ *      - size  - size of region
+ *      - dir   - DMA direction
+ */
+ENTRY(arm922_dma_map_area)
+        add     r1, r1, r0
+        cmp     r2, #DMA_TO_DEVICE
+        beq     arm922_dma_clean_range
+        bcs     arm922_dma_inv_range
+        b       arm922_dma_flush_range
+ENDPROC(arm922_dma_map_area)
+
+/*
+ *      dma_unmap_area(start, size, dir)
+ *      - start - kernel virtual start address
+ *      - size  - size of region
+ *      - dir   - DMA direction
+ */
+ENTRY(arm922_dma_unmap_area)
+        mov     pc, lr
+ENDPROC(arm922_dma_unmap_area)
+
 ENTRY(arm922_cache_fns)
         .long   arm922_flush_kern_cache_all
         .long   arm922_flush_user_cache_all
@@ -297,6 +321,8 @@ ENTRY(arm922_cache_fns)
         .long   arm922_coherent_kern_range
         .long   arm922_coherent_user_range
         .long   arm922_flush_kern_dcache_area
+        .long   arm922_dma_map_area
+        .long   arm922_dma_unmap_area
         .long   arm922_dma_inv_range
         .long   arm922_dma_clean_range
         .long   arm922_dma_flush_range