1 files changed, 34 insertions, 9 deletions

diff --git a/arch/arm/mm/proc-arm926.S b/arch/arm/mm/proc-arm926.S
index 1c4848704bb3..75b707c9cce1 100644
--- a/arch/arm/mm/proc-arm926.S
+++ b/arch/arm/mm/proc-arm926.S
@@ -214,15 +214,16 @@ ENTRY(arm926_coherent_user_range)
         mov     pc, lr
 
 /*
- *      flush_kern_dcache_page(void *page)
+ *      flush_kern_dcache_area(void *addr, size_t size)
  *
  *      Ensure no D cache aliasing occurs, either with itself or
  *      the I cache
  *
- *      - addr  - page aligned address
+ *      - addr  - kernel address
+ *      - size  - region size
  */
-ENTRY(arm926_flush_kern_dcache_page)
-        add     r1, r0, #PAGE_SZ
+ENTRY(arm926_flush_kern_dcache_area)
+        add     r1, r0, r1
 1:      mcr     p15, 0, r0, c7, c14, 1          @ clean+invalidate D entry
         add     r0, r0, #CACHE_DLINESIZE
         cmp     r0, r1
@@ -245,7 +246,7 @@ ENTRY(arm926_flush_kern_dcache_page)
  *
  * (same as v4wb)
  */
-ENTRY(arm926_dma_inv_range)
+arm926_dma_inv_range:
 #ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
         tst     r0, #CACHE_DLINESIZE - 1
         mcrne   p15, 0, r0, c7, c10, 1          @ clean D entry
@@ -270,7 +271,7 @@ ENTRY(arm926_dma_inv_range)
  *
  * (same as v4wb)
  */
-ENTRY(arm926_dma_clean_range)
+arm926_dma_clean_range:
 #ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
         bic     r0, r0, #CACHE_DLINESIZE - 1
 1:      mcr     p15, 0, r0, c7, c10, 1          @ clean D entry
@@ -303,15 +304,39 @@ ENTRY(arm926_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(arm926_dma_map_area)
+        add     r1, r1, r0
+        cmp     r2, #DMA_TO_DEVICE
+        beq     arm926_dma_clean_range
+        bcs     arm926_dma_inv_range
+        b       arm926_dma_flush_range
+ENDPROC(arm926_dma_map_area)
+
+/*
+ *      dma_unmap_area(start, size, dir)
+ *      - start - kernel virtual start address
+ *      - size  - size of region
+ *      - dir   - DMA direction
+ */
+ENTRY(arm926_dma_unmap_area)
+        mov     pc, lr
+ENDPROC(arm926_dma_unmap_area)
+
 ENTRY(arm926_cache_fns)
         .long   arm926_flush_kern_cache_all
         .long   arm926_flush_user_cache_all
         .long   arm926_flush_user_cache_range
         .long   arm926_coherent_kern_range
         .long   arm926_coherent_user_range
-        .long   arm926_flush_kern_dcache_page
-        .long   arm926_dma_inv_range
-        .long   arm926_dma_clean_range
+        .long   arm926_flush_kern_dcache_area
+        .long   arm926_dma_map_area
+        .long   arm926_dma_unmap_area
         .long   arm926_dma_flush_range
 
 ENTRY(cpu_arm926_dcache_clean_area)