1 files changed, 59 insertions, 0 deletions
diff --git a/arm7/lib/src/OS_reset.c b/arm7/lib/src/OS_reset.c
new file mode 100644
index 00000000..c40fcff3
--- /dev/null
+++ b/arm7/lib/src/OS_reset.c
@@ -0,0 +1,59 @@
+#include "function_target.h"
+#include "OS_reset.h"
+#include "OS_interrupt.h"
+
+static u16 OSi_IsInitReset = 0;
+vu16 OSi_IsResetOccurred = 0;
+
+extern void MI_StopDma(u32 dma);
+extern OSIrqMask OS_SetIrqMask(OSIrqMask mask);
+extern OSIrqMask OS_ResetRequestIrqMask(OSIrqMask mask);
+extern void SND_Shutdown(void);
+extern void PXI_SetFifoRecvCallback(u32 param1, void* callback);
+extern void OS_Terminate(void);
+extern u32 PXI_SendWordByFifo(u32 param1, u32 data, u32 param2);
+extern void FUN_038073EC(void); //OSi_DoResetSystem, in wram
+
+ARM_FUNC void OS_InitReset(void)
+{
+    if (OSi_IsInitReset)
+        return;
+    OSi_IsInitReset = TRUE;
+
+    PXI_SetFifoRecvCallback(PXI_FIFO_TAG_OS, OSi_CommonCallback);
+}
+
+ARM_FUNC BOOL OS_IsResetOccurred(void)
+{
+    return OSi_IsResetOccurred;
+}
+
+ARM_FUNC static void OSi_CommonCallback(PXIFifoTag tag, u32 data, BOOL err)
+{
+#pragma unused(tag, err)
+    u16 command = (u16)((data & OS_PXI_COMMAND_MASK) >> OS_PXI_COMMAND_SHIFT);
+    if (command == OS_PXI_COMMAND_RESET)
+    {
+        OSi_IsResetOccurred = TRUE;
+        return;
+    }
+    OS_Terminate();
+}
+
+ARM_FUNC static void OSi_SendToPxi(u16 data)
+{
+    while (PXI_SendWordByFifo(PXI_FIFO_TAG_OS, (u32) data << 0x8, FALSE)) {}
+}
+
+ARM_FUNC void OS_ResetSystem(void) {
+    MI_StopDma(0);
+    MI_StopDma(1);
+    MI_StopDma(2);
+    MI_StopDma(3);
+
+    (void)OS_SetIrqMask(0x40000);
+    (void)OS_ResetRequestIrqMask((u32)~0);
+    SND_Shutdown();
+    OSi_SendToPxi(OS_PXI_COMMAND_RESET);
+    FUN_038073EC(); //OSi_DoResetSystem, in wram
+}