From 538718997fd9c85289669c1b5a8e46a45b6328af Mon Sep 17 00:00:00 2001
From: Nebuleon Fumika
Date: Sun, 3 Feb 2013 15:52:45 -0500
Subject: Write back the data cache before using DMA to draw emulated frames.

---
 source/nds/entry.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'source/nds')

diff --git a/source/nds/entry.cpp b/source/nds/entry.cpp
index 3fa6517..286722e 100644
--- a/source/nds/entry.cpp
+++ b/source/nds/entry.cpp
@@ -144,6 +144,7 @@ bool8 S9xDeinitUpdate (int Width, int Height, bool8 /*sixteen_bit*/)
 		//Up
 		case 1:
 #ifdef DS2_DMA
+			__dcache_writeback_all();
 			dma_copy32Byte(1 /* channel: graphics */, up_screen_addr, GFX.Screen + 256 * 32 * 2, 256 * 192 * 2);
 			dma_wait_finish(1);
 			dma_stop(1);
@@ -155,6 +156,7 @@ bool8 S9xDeinitUpdate (int Width, int Height, bool8 /*sixteen_bit*/)
 		//Down
 		case 2:
 #ifdef DS2_DMA
+			__dcache_writeback_all();
 			dma_copy32Byte(1 /* channel: graphics */, up_screen_addr, GFX.Screen, 256 * 192 * 2);
 			dma_wait_finish(1);
 			dma_stop(1);
@@ -166,6 +168,7 @@ bool8 S9xDeinitUpdate (int Width, int Height, bool8 /*sixteen_bit*/)
 		//Both
 		case 3:
 #ifdef DS2_DMA
+			__dcache_writeback_all();
 			dma_copy32Byte(1 /* channel: graphics */, up_screen_addr, GFX.Screen + 256 * 16 * 2, 256 * 192 * 2);
 			dma_wait_finish(1);
 			dma_stop(1);
@@ -181,8 +184,11 @@ bool8 S9xDeinitUpdate (int Width, int Height, bool8 /*sixteen_bit*/)
 
 		default:
 		{
-			unsigned char *src, *dst;
-			unsigned int m;
+#ifdef DS2_DMA
+			__dcache_writeback_all();
+#endif
+			register unsigned char *src, *dst;
+			register unsigned int m;
 
 			src = GFX.Screen;
 			dst = (unsigned char*)up_screen_addr;
-- 
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