Decompile MI_dma.c

1 files changed, 36 insertions, 0 deletions

diff --git a/arm7/lib/src/MI_dma.c b/arm7/lib/src/MI_dma.c
new file mode 100644
index 00000000..fc2ff0c9
--- /dev/null
+++ b/arm7/lib/src/MI_dma.c
@@ -0,0 +1,36 @@
+#include "function_target.h"
+#include "MI_dma.h"
+#include "OS_system.h"
+
+ARM_FUNC void MI_WaitDma(u32 channel) {
+    OSIntrMode mode = OS_DisableInterrupts();
+    vu32 * addr = (vu32 *)(REG_ADDR_DMA0SAD + (channel * 3 + 2) * 4);
+    while(addr[0] & 0x80000000) ;
+    if (channel == 0) {
+        addr = (vu32 *)(REG_ADDR_DMA0SAD + channel * 12);
+        addr[0] = 0;
+        addr[1] = 0;
+        addr[2] = 0x81400001;
+    }
+    mode = OS_RestoreInterrupts(mode);
+}
+
+ARM_FUNC void MI_StopDma(u32 channel) {
+    OSIntrMode mode = OS_DisableInterrupts();
+    vu16 * addr = (vu16 *)(REG_ADDR_DMA0SAD + (channel * 6 + 5) * 2);
+    addr[0] &= ~(DMA_START_MASK | DMA_REPEAT);
+    addr[0] &= ~DMA_ENABLE;
+    {
+        s32 dummy = addr[0];
+    }
+    {
+        s32 dummy = addr[0];
+    }
+    if (channel == 0) {
+        vu32 * addr32 = (vu32 *)(REG_ADDR_DMA0SAD + channel * 12);
+        addr32[0] = 0;
+        addr32[1] = 0;
+        addr32[2] = 0x81400001;
+    }
+    mode = OS_RestoreInterrupts(mode);
+}