genram

#!/usr/bin/perl 
my ($myedata,$myend,$initmips,$mystart,$tgt_putchar);
open(F,qq(objdump -x $ARGV[0]|));
while(<F>)
{
chomp;
if(/([0-9a-f]+).+_edata/){
   $myedata=qq(0x$1);
 }

if(/([0-9a-f]+).+_end$/){
   $myend=qq(0x$1);
 }
if(/([0-9a-f]+).+initmips$/){
   $myinitmips=qq(0x$1);
 }
if(/([0-9a-f]+).+\s_start$/){
   $mystart=qq(0x$1);
 }
if(/([0-9a-f]+).+\stgt_putchar$/){
   $tgt_putchar=qq(0x$1);
 }
}
printf(<< "END"
#define NOMSG
typedef	long long  off_t;	
struct callvectors {
	int     (*open) (char *, int, int);
	int     (*close) (int);
	int     (*read) (int, void *, int);
	int     (*write) (int, void *, int);
	off_t   (*lseek) (int, off_t, int);
	int     (*printf) (const char *, ...);
	void    (*cacheflush) (void);
	char    *(*gets) (char *);
};
struct callvectors *cvs;
void realinitmips(unsigned int msize);
#ifndef NOCACHE2
void flush_cache2()
{
asm volatile(\
"	mfc0	\$3, \$15			# read processor ID register;" \\
"	li		\$2, 0x6303				#godson2f prid;" \\
"	beq		\$2, \$3, godson_2f;" \\
"	nop;" \\
"	li		\$2, 0x6302				#godson2e prid;" \\
"	bne	\$2, \$3,11f ;"\\
"	nop;" \\
"# godson2e;" \\
"godson_2f:;" \\
"	li	  \$2, 0x80000000;" \\
"    addu  \$3,\$2,512*1024;" \\
"10:;" \\
"	cache	3, 0(\$2);" \\
"	cache	3, 1(\$2);" \\
"	cache	3, 2(\$2);" \\
"	cache	3, 3(\$2);" \\
"	addu	\$2, 32;" \\
"	bne	    \$2,\$3, 10b;" \\
"	nop;" \\
"11:;" \\
::
:"\$2","\$3"
);
}
#else
void flush_cache()
{
asm volatile(\
"		.set mips3;;" \\
"        li    \$5,0x80000000;" \\
"        addu  \$6,\$5,16384;" \\
"1:;" \\
"        cache  1,0(\$5);" \\
"        cache  1,1(\$5);" \\
"        cache  1,2(\$5);" \\
"        cache  1,3(\$5);" \\
"        cache  0,(\$5);" \\
"        add    \$5,\$5,32;" \\
"        bne    \$5,\$6,1b;" \\
"        nop;" \\
"		.set mips0;;" \\
::
: "\$5","\$6");
}
#endif
void initmips(unsigned int msize,struct callvectors *cv)
{
    int *edata=(void *)$myedata;
    int *end=(void *)$myend;
    int *p;
    cvs=cv;
    tgt_puts("Uncompressing Bios");
    run_unzip(biosdata,$mystart);
    tgt_puts("OK,Booting Bios\\r\\n");
    for(p=edata;p<=end;p++)
    {
        *p=0;
    }
	memset($mystart-0x1000,0,0x1000);//$mystart-0x1000 for frame(registers),memset for pretty
//	cv->cacheflush();
	tgt_puts("flush_cache...");
#ifdef NOCACHE2
	flush_cache();
#else
	flush_cache2();
#endif
	tgt_puts("done,boot now\\r\\n");
    realinitmips(msize);
}

void realinitmips(unsigned int msize)
{
	     asm ("li  \$29,$mystart-0x4000;" \
		      "li \$2,$myinitmips;" \
			  "move \$4,\%0;" \
			  "jalr \$2;" \
			  " nop;" \
			  "1: b 1b;nop;"
          :
          : "r" (msize)
          : "\$29", "\$2","\$4");
}

static void (*rom_putchar)(char c)=(${tgt_putchar}-${mystart}+0xffffffffbfc00000);
void tgt_putchar(char c)
{
#ifndef NOMSG
cvs->printf("%%c",c);
#endif
}
int tgt_puts(char *str)
{
#ifndef NOMSG
cvs->printf("%%s",str);
#endif
}
END
);