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, 25 insertions, 0 deletions

diff --git a/arch/arm/mm/cache-v4wt.S b/arch/arm/mm/cache-v4wt.S
index b3b7410270b4..3d8dad5b2650 100644
--- a/arch/arm/mm/cache-v4wt.S
+++ b/arch/arm/mm/cache-v4wt.S
@@ -172,6 +172,29 @@ ENTRY(v4wt_dma_clean_range)
         .globl  v4wt_dma_flush_range
         .equ    v4wt_dma_flush_range, v4wt_dma_inv_range
 
+/*
+ *      dma_unmap_area(start, size, dir)
+ *      - start - kernel virtual start address
+ *      - size  - size of region
+ *      - dir   - DMA direction
+ */
+ENTRY(v4wt_dma_unmap_area)
+        add     r1, r1, r0
+        teq     r2, #DMA_TO_DEVICE
+        bne     v4wt_dma_inv_range
+        /* FALLTHROUGH */
+
+/*
+ *      dma_map_area(start, size, dir)
+ *      - start - kernel virtual start address
+ *      - size  - size of region
+ *      - dir   - DMA direction
+ */
+ENTRY(v4wt_dma_map_area)
+        mov     pc, lr
+ENDPROC(v4wt_dma_unmap_area)
+ENDPROC(v4wt_dma_map_area)
+
         __INITDATA
 
         .type   v4wt_cache_fns, #object
@@ -182,6 +205,8 @@ ENTRY(v4wt_cache_fns)
         .long   v4wt_coherent_kern_range
         .long   v4wt_coherent_user_range
         .long   v4wt_flush_kern_dcache_area
+        .long   v4wt_dma_map_area
+        .long   v4wt_dma_unmap_area
         .long   v4wt_dma_inv_range
         .long   v4wt_dma_clean_range
         .long   v4wt_dma_flush_range