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>
diff --git a/arch/arm/mm/proc-arm922.S b/arch/arm/mm/proc-arm922.S
index ee111b0..4e4396b 100644
--- a/arch/arm/mm/proc-arm922.S
+++ b/arch/arm/mm/proc-arm922.S
@@ -290,6 +290,30 @@
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 @@
.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