mirror of
https://github.com/zeldaret/mm.git
synced 2026-06-20 15:41:10 -04:00
Derek Hensley
85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
#include "ultra64.h"
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#include "stdbool.h"
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#define COLD_RESET 0
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typedef struct __osExceptionVector {
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/* 0x0 */ u32 ins_00; // lui k0, 0x8000
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/* 0x4 */ u32 ins_04; // addiu k0, k0, 0x39E0
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/* 0x8 */ u32 ins_08; // jr k0 ; __osException
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/* 0xC */ u32 ins_0C; // nop
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} __osExceptionVector; // size = 0x10
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extern __osExceptionVector __osExceptionPreamble;
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u64 osClockRate = OS_CLOCK_RATE;
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s32 osViClock = VI_NTSC_CLOCK;
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u32 __osShutdown = 0;
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u32 __OSGlobalIntMask = OS_IM_ALL;
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u32 __osFinalrom;
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void __createSpeedParam(void) {
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__Dom1SpeedParam.type = DEVICE_TYPE_INIT;
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__Dom1SpeedParam.latency = IO_READ(PI_BSD_DOM1_LAT_REG);
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__Dom1SpeedParam.pulse = IO_READ(PI_BSD_DOM1_PWD_REG);
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__Dom1SpeedParam.pageSize = IO_READ(PI_BSD_DOM1_PGS_REG);
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__Dom1SpeedParam.relDuration = IO_READ(PI_BSD_DOM1_RLS_REG);
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__Dom2SpeedParam.type = DEVICE_TYPE_INIT;
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__Dom2SpeedParam.latency = IO_READ(PI_BSD_DOM2_LAT_REG);
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__Dom2SpeedParam.pulse = IO_READ(PI_BSD_DOM2_PWD_REG);
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__Dom2SpeedParam.pageSize = IO_READ(PI_BSD_DOM2_PGS_REG);
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__Dom2SpeedParam.relDuration = IO_READ(PI_BSD_DOM2_RLS_REG);
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}
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void __osInitialize_common(void) {
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u32 pifdata;
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__osFinalrom = 1;
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__osSetSR(__osGetSR() | SR_CU1);
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__osSetFpcCsr(FPCSR_FS | FPCSR_EV);
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__osSetWatchLo(0x04900000);
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while (__osSiRawReadIo(PIF_RAM_END - 3, &pifdata)) {}
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while (__osSiRawWriteIo(PIF_RAM_END - 3, pifdata | 8)) {}
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*(__osExceptionVector*)UT_VEC = __osExceptionPreamble;
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*(__osExceptionVector*)XUT_VEC = __osExceptionPreamble;
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*(__osExceptionVector*)ECC_VEC = __osExceptionPreamble;
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*(__osExceptionVector*)E_VEC = __osExceptionPreamble;
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osWritebackDCache((void*)UT_VEC, E_VEC - UT_VEC + sizeof(__osExceptionVector));
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osInvalICache((void*)UT_VEC, E_VEC - UT_VEC + sizeof(__osExceptionVector));
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__createSpeedParam();
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osUnmapTLBAll();
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osMapTLBRdb();
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osClockRate = osClockRate * 3 / 4;
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if (osResetType == COLD_RESET) {
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bzero(osAppNMIBuffer, OS_APP_NMI_BUFSIZE);
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}
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if (osTvType == OS_TV_PAL) {
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osViClock = VI_PAL_CLOCK;
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} else if (osTvType == OS_TV_MPAL) {
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osViClock = VI_MPAL_CLOCK;
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} else {
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osViClock = VI_NTSC_CLOCK;
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}
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if (__osGetCause() & CAUSE_IP5) {
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while (true) {}
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}
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IO_WRITE(AI_CONTROL_REG, AI_CONTROL_DMA_ON);
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IO_WRITE(AI_DACRATE_REG, AI_MAX_DAC_RATE - 1);
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IO_WRITE(AI_BITRATE_REG, AI_MAX_BIT_RATE - 1);
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}
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void __osInitialize_autodetect(void) {
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}
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