1 files changed, 79 insertions, 0 deletions
diff --git a/arm9/lib/src/OS_interrupt.c b/arm9/lib/src/OS_interrupt.c
new file mode 100644
index 00000000..f7a6d005
--- /dev/null
+++ b/arm9/lib/src/OS_interrupt.c
@@ -0,0 +1,79 @@
+//
+// Created by red031000 on 2020-05-07.
+//
+
+#include "consts.h"
+#include "function_target.h"
+#include "OS_interrupt.h"
+#include "OS_thread.h"
+
+#pragma optimize_for_size on
+
+extern OSThreadQueue OSi_IrqThreadQueue;
+extern OSIrqMask OS_EnableIrqMask(OSIrqMask intr);
+
+ARM_FUNC void OS_InitIrqTable() {
+    OS_InitThreadQueue(&OSi_IrqThreadQueue);
+}
+
+ARM_FUNC void OS_SetIrqFunction(OSIrqMask intrBit, OSIrqFunction function) {
+    s32 i;
+    OSIrqCallbackInfo *info;
+
+    for (i = 0; i < 0x16; i++) {
+        if (intrBit & 1) {
+            info = NULL;
+
+            if (8 <= i && i <= 11) {
+                info = &OSi_IrqCallbackInfo[i - 8];
+            }
+            else if (3 <= i && i <= 6) {
+                info = &OSi_IrqCallbackInfo[i - 3 + 4];
+            }
+            else {
+                OS_IRQTable[i] = function;
+            }
+
+            if (info) {
+                info->func = (void (*)(void *))function;
+                info->arg = 0;
+                info->enable = TRUE;
+            }
+        }
+        intrBit >>= 1;
+    }
+}
+
+ARM_FUNC OSIrqFunction OS_GetIrqFunction(OSIrqMask intrBit) {
+    s32 i = 0;
+    OSIrqFunction *funcPtr = &OS_IRQTable[0];
+
+    do {
+        if (intrBit & 1)
+        {
+            if (8 <= i && i <= 11) {
+                i = i - 8;
+                return (void (*)(void))OSi_IrqCallbackInfo[i].func;
+            }
+            else if (3 <= i && i <= 6) {
+                i++;
+                return (void (*)(void))OSi_IrqCallbackInfo[i].func;
+            }
+
+            return *funcPtr;
+        }
+        intrBit >>= 1;
+        funcPtr++;
+        i++;
+    } while (i < 0x16);
+    return 0;
+}
+
+ARM_FUNC void OSi_EnterDmaCallback(u32 dmaNo, void (*callback) (void *), void *arg)
+{
+    OSIrqMask mask = 1UL << (dmaNo + 8);
+    OSi_IrqCallbackInfo[dmaNo].func = callback;
+    OSi_IrqCallbackInfo[dmaNo].arg = arg;
+
+    OSi_IrqCallbackInfo[dmaNo].enable = OS_EnableIrqMask(mask) & mask;
+}