initialize_msp.c
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#include <R4300.h>
#include <rcp.h>
#include <ramrom.h>
#include "osint.h"
#include "piint.h"
#include "rdb.h"
typedef struct {
unsigned int inst1; /* lui k0,XXXX */
unsigned int inst2; /* addiu k0,k0,XXXX */
unsigned int inst3; /* jr k0 */
unsigned int inst4; /* nop */
} __osExceptionVector;
extern u64 osClockRate ;
extern int osViClock ; /* Video clock rate (default is NTSC) */
extern s32 __osShutdown ; /* 1 = pre-NMI interrupt has occured */
extern OSIntMask __OSGlobalIntMask ;
#ifdef _FINALROM
extern s32 __osFinalrom;
#else
extern s32 __kmc_pt_mode;
extern void *__printfunc;
#endif
extern void __createSpeedParam(void);
#ifndef _FINALROM
/* 機種依存の print (callback) */
volatile static unsigned *stat= (unsigned *)0xbff08004;
volatile static unsigned *wport=(unsigned *)0xbff08000;
#if 0
volatile static unsigned *piok= (unsigned *)0xa4600010;
#endif
extern s32 __kmc_pt_mode;
static void rmonPutchar(char c)
{
#if 0
while((*piok & 3)!=0) ;
while((*stat & 4)==0) ;
*wport=c;
#else
u32 data;
while(1){
osPiReadIo((u32)stat,&data);
if (data & 4){
osPiWriteIo((u32)wport,c);
break;
}
}
#endif
}
static void *msp_proutSyncPrintf(void *str, const char *buf, int n)
{
int i;
char c,*p,*q,xbuf[128];
static int column = 0;
p=xbuf;
for(i=0;i<n;++i){
c=*(buf++);
switch (c) {
case '\n':
*(p++)='\n';
column = 0;
break;
case '\t':
do{
*(p++)=' ';
}while(++column % 8);
break;
default:
column++;
*(p++)=c;
break;
}
if(c=='\n' || (p-xbuf)>100){
rmonPutchar((p-xbuf)-1);
q=xbuf;
while(q!=p){
rmonPutchar(*(q++));
}
p=xbuf;
}
}
if(p!=xbuf){
rmonPutchar((p-xbuf)-1);
q=xbuf;
while(q!=p){
rmonPutchar(*(q++));
}
}
return ((void *) 1); /* return a fake pointer so that it's not NULL */
}
#endif
void
__osInitialize_msp(void)
{
#ifndef _FINALROM
/* デバッガ機種依存の初期化 */
if(__kmc_pt_mode==0){
int (*fnc)();
unsigned *src,*dst;
unsigned monadr;
extern unsigned __ptExceptionPreamble[];
volatile unsigned *mon;
volatile unsigned *stat;
stat= (unsigned *)0xbff08004;
mon=(unsigned *)0xbff00000;
if(*mon!=0x4b4d4300) return;
/*
* Copy partner exception preamble to 0x8000_0180-019f
* Since leoBootID variable starts from 0x8000_01a0,
* exception preamble should not be overwrapped.
*/
src=(unsigned *)__ptExceptionPreamble;
dst=(unsigned *)E_VEC;
*(dst++)=*(src++); /* 0x8000_0180 */
*(dst++)=*(src++); /* 0x8000_0184 */
*(dst++)=*(src++); /* 0x8000_0188 */
src+=2;
dst+=2;
*(dst++)=*(src++); /* 0x8000_0194 */
*(dst++)=*(src++); /* 0x8000_0198 */
*(dst++)=*(src++); /* 0x8000_019c */
osWritebackDCache((void*)E_VEC,9*sizeof(unsigned));
osInvalICache((void*)E_VEC,9*sizeof(unsigned));
__kmc_pt_mode=1;
if((*stat & 0x10)==0){ /* RUN OFF ? */
monadr=*(mon+1);
if(monadr!=0xbff00000){
unsigned *src,*dst;
unsigned ct;
dst=(unsigned *)(monadr | 0x20000000);
ct=0x2000/4;
src=(unsigned *)0xbff00000;
while(ct){
*(dst++)=*(src++);
--ct;
}
}
(unsigned int *)fnc = monadr+8;
(*fnc)(0x4b4d4300,0);
}
__printfunc = (void*)&msp_proutSyncPrintf;
}
#endif
}
/* デバッガの接続チェック */
int __checkHardware_msp(void)
{
volatile unsigned *mon;
mon=(unsigned *)0xbff00000;
if(*mon==0x4b4d4300){
mon = (unsigned *)0xbff00010;
if(*mon == 0x00000000)
return 1;
else
return 0;
}
else
return 0;
}