The first commit

src/core1/os/initialize.c

@@ -0,0 +1,69 @@
+#include <ultra64.h>
+#include "functions.h"
+#include "variables.h"
+
+
+
+typedef struct
+{
+   /* 0x0 */ unsigned int inst1;
+   /* 0x4 */ unsigned int inst2;
+   /* 0x8 */ unsigned int inst3;
+   /* 0xC */ unsigned int inst4;
+} __osExceptionVector;
+// extern __osExceptionVector __osExceptionPreamble;
+extern __osExceptionVector D_8026A2E0;
+
+OSTime osClockRate = OS_CLOCK_RATE;
+s32 osViClock = VI_NTSC_CLOCK;
+u32 __osShutdown = 0;
+u32 __OSGlobalIntMask = OS_IM_ALL;
+u32 __osFinalrom;
+
+void __osInitialize_common()
+{
+   u32 pifdata;
+   u32 clock = 0;
+   __osFinalrom = TRUE;
+   __osSetSR(__osGetSR() | SR_CU1);    //enable fpu
+   __osSetFpcCsr(FPCSR_FS | FPCSR_EV); //flush denorm to zero, enable invalid operation
+
+   while (__osSiRawReadIo(PIF_RAM_END - 3, &pifdata)) //last byte of joychannel ram
+   {
+      ;
+   }
+   while (__osSiRawWriteIo(PIF_RAM_END - 3, pifdata | 8))
+   {
+      ; //todo: magic contant
+   }
+   *(__osExceptionVector *)UT_VEC =  D_8026A2E0; //__osExceptionPreamble;
+   *(__osExceptionVector *)XUT_VEC = D_8026A2E0; //__osExceptionPreamble;
+   *(__osExceptionVector *)ECC_VEC = D_8026A2E0; //__osExceptionPreamble;
+   *(__osExceptionVector *)E_VEC =   D_8026A2E0; //__osExceptionPreamble;
+   osWritebackDCache((void *)UT_VEC, E_VEC - UT_VEC + sizeof(__osExceptionVector));
+   osInvalICache((void *)UT_VEC, E_VEC - UT_VEC + sizeof(__osExceptionVector));
+   osMapTLBRdb();
+   osPiRawReadIo(4, &clock); //TODO: remove magic constant;
+   clock &= ~0xf;            //clear lower 4 bits
+   if (clock != 0)
+   {
+      osClockRate = clock;
+   }
+   osClockRate = osClockRate * 3 / 4;
+   if (osResetType == 0 /*cold reset */)
+   {
+      bzero(osAppNMIBuffer, OS_APP_NMI_BUFSIZE);
+   }
+   if (osTvType == OS_TV_PAL)
+   {
+      osViClock = VI_PAL_CLOCK;
+   }
+   else if (osTvType == OS_TV_MPAL)
+   {
+      osViClock = VI_MPAL_CLOCK;
+   }
+   else
+   {
+      osViClock = VI_NTSC_CLOCK;
+   }
+}