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, 41 insertions, 0 deletions

diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S
index 93df47265f2d..a7999f94bf27 100644
--- a/arch/arm/mm/proc-xscale.S
+++ b/arch/arm/mm/proc-xscale.S
@@ -363,6 +363,43 @@ ENTRY(xscale_dma_flush_range)
         mcr     p15, 0, r0, c7, c10, 4          @ Drain Write (& Fill) Buffer
         mov     pc, lr
 
+/*
+ *      dma_map_area(start, size, dir)
+ *      - start - kernel virtual start address
+ *      - size  - size of region
+ *      - dir   - DMA direction
+ */
+ENTRY(xscale_dma_map_area)
+        add     r1, r1, r0
+        cmp     r2, #DMA_TO_DEVICE
+        beq     xscale_dma_clean_range
+        bcs     xscale_dma_inv_range
+        b       xscale_dma_flush_range
+ENDPROC(xscale_dma_map_area)
+
+/*
+ *      dma_map_area(start, size, dir)
+ *      - start - kernel virtual start address
+ *      - size  - size of region
+ *      - dir   - DMA direction
+ */
+ENTRY(xscale_dma_a0_map_area)
+        add     r1, r1, r0
+        teq     r2, #DMA_TO_DEVICE
+        beq     xscale_dma_clean_range
+        b       xscale_dma_flush_range
+ENDPROC(xscsale_dma_a0_map_area)
+
+/*
+ *      dma_unmap_area(start, size, dir)
+ *      - start - kernel virtual start address
+ *      - size  - size of region
+ *      - dir   - DMA direction
+ */
+ENTRY(xscale_dma_unmap_area)
+        mov     pc, lr
+ENDPROC(xscale_dma_unmap_area)
+
 ENTRY(xscale_cache_fns)
         .long   xscale_flush_kern_cache_all
         .long   xscale_flush_user_cache_all
@@ -370,6 +407,8 @@ ENTRY(xscale_cache_fns)
         .long   xscale_coherent_kern_range
         .long   xscale_coherent_user_range
         .long   xscale_flush_kern_dcache_area
+        .long   xscale_dma_map_area
+        .long   xscale_dma_unmap_area
         .long   xscale_dma_inv_range
         .long   xscale_dma_clean_range
         .long   xscale_dma_flush_range
@@ -394,6 +433,8 @@ ENTRY(xscale_80200_A0_A1_cache_fns)
         .long   xscale_coherent_kern_range
         .long   xscale_coherent_user_range
         .long   xscale_flush_kern_dcache_area
+        .long   xscale_dma_a0_map_area
+        .long   xscale_dma_unmap_area
         .long   xscale_dma_flush_range
         .long   xscale_dma_clean_range
         .long   xscale_dma_flush_range