69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
#include <ultra64.h>
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#include "functions.h"
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#include "variables.h"
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OSTime 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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typedef struct
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{
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/* 0x0 */ unsigned int inst1;
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/* 0x4 */ unsigned int inst2;
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/* 0x8 */ unsigned int inst3;
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/* 0xC */ unsigned int inst4;
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} __osExceptionVector;
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extern __osExceptionVector __osExceptionPreamble;
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// osInitialize
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void __osInitialize_common()
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{
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u32 pifdata;
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u32 clock = 0;
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__osFinalrom = TRUE;
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__osSetSR(__osGetSR() | SR_CU1); //enable fpu
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__osSetFpcCsr(FPCSR_FS | FPCSR_EV); //flush denorm to zero, enable invalid operation
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while (__osSiRawReadIo(PIF_RAM_END - 3, &pifdata)) //last byte of joychannel ram
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{
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;
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}
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while (__osSiRawWriteIo(PIF_RAM_END - 3, pifdata | 8))
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{
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; //todo: magic contant
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}
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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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osMapTLBRdb();
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osPiRawReadIo(4, &clock); //TODO: remove magic constant;
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clock &= ~0xf; //clear lower 4 bits
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if (clock != 0)
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{
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osClockRate = clock;
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}
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osClockRate = osClockRate * 3 / 4;
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if (osResetType == 0 /*cold reset */)
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{
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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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{
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osViClock = VI_PAL_CLOCK;
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}
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else if (osTvType == OS_TV_MPAL)
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{
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osViClock = VI_MPAL_CLOCK;
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}
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else
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{
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osViClock = VI_NTSC_CLOCK;
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}
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}
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