Decomp idle.c

2026-06-19 01:20:08 -07:00 · 2020-01-16 21:35:54 -06:00
parent 60a7168cea
commit e74e227113
11 changed files with 223 additions and 172 deletions
@@ -0,0 +1,108 @@
+#include <ultra64.h>
+#include <global.h>
+
+void Idle_ClearMemory(void* begin, void* end){
+    if (begin < end) {
+        bzero(begin, (s32)(int)end - (int)begin);
+    }
+}
+
+#ifdef NON_MATCHING
+// This loop shouldn't unroll
+void Idle_InitFramebuffer(u32* ptr, u32 numBytes, u32 value) {
+    while (numBytes) {
+        *ptr++ = value;
+        numBytes -= sizeof(u32);
+    }
+}
+#else
+GLOBAL_ASM("./asm/nonmatching/idle/Idle_InitFramebuffer.asm")
+#endif
+
+void Idle_InitScreen(void) {
+    Idle_InitFramebuffer((u32*)&D_80000500, 0x25800, 0x00010001);
+    func_800805E0(0);
+    osViSwapBuffer(&D_80000500);
+    osViRepeatLine(0);
+}
+
+void Idle_InitMemory(void) {
+    u32 pad;
+    void* memEnd = (void*)(0x80000000 + osMemSize);
+
+    Idle_ClearMemory((void*)0x80000400, &D_80000500);
+    Idle_ClearMemory(&D_80025D00, (int*)&boot_text_start);
+    Idle_ClearMemory(&code_bss_end, memEnd);
+}
+
+#ifdef NON_MATCHING
+// regalloc around Dmamgr_SendRequest
+void Idle_InitCodeAndMemory(void) {
+    DmaRequest dmaReq;
+    OSMesgQueue queue;
+    OSMesg mesg;
+    u32 oldSize;
+
+    osCreateMesgQueue(&queue, &mesg, 1);
+
+    oldSize = dmamgrChunkSize;
+    dmamgrChunkSize = 0;
+
+    Dmamgr_SendRequest(&dmaReq, (u32)&code_text_start, (u32)&code_vrom_start, (u32)&code_vrom_end - (u32)&code_vrom_start, 0, &queue, 0);
+    Idle_InitScreen();
+    Idle_InitMemory();
+    osRecvMesg(&queue, 0, 1);
+
+    dmamgrChunkSize = oldSize;
+
+    Idle_ClearMemory(&code_bss_start, &code_bss_end);
+}
+#else
+GLOBAL_ASM("./asm/nonmatching/idle/Idle_InitCodeAndMemory.asm")
+#endif
+
+void Idle_MainThreadEntry(void* arg) {
+    StackCheck_Init(&irqmgrStackEntry, (u32)&irqmgrStack, (u32)&irqmgrStack[1280], 0, 256, "irqmgr");
+    Irqmgr_Start(&irqmgrContext, &irqmgrStackEntry, 18, 1);
+    Dmamgr_Start();
+    Idle_InitCodeAndMemory();
+    main(arg);
+    Dmamgr_Stop();
+}
+
+void func_8008038C(void) {
+    osCreateViManager(254);
+
+    viEnabledSpecialFeatures = 66;
+    screenXScale = 1.0;
+    screenYScale = 1.0;
+
+    switch (osTvType) {
+    case 1:
+        D_8009B290 = 2;
+        D_8009B240 = osViModeNtscLan1;
+        break;
+    case 2:
+        D_8009B290 = 30;
+        D_8009B240 = osViModeMpalLan1;
+        break;
+    case 0:
+        D_8009B290 = 44;
+        D_8009B240 = D_800980E0;
+        screenYScale = 0.833f;
+        break;
+    }
+
+    D_80096B20 = 1;
+}
+
+void Idle_ThreadEntry(void* arg) {
+    func_8008038C();
+    osCreatePiManager(150, &D_8009B228, D_8009B160, 50);
+    StackCheck_Init(&mainStackEntry, (u32)&mainStack, (u32)&mainStack[2304], 0, 1024, "main");
+    osCreateThread(&mainOSThread, 3, (osCreateThread_func)Idle_MainThreadEntry, arg, &mainStack[2304], 12);
+    osStartThread(&mainOSThread);
+    osSetThreadPri(NULL, 0);
+
+    for(;;);
+}