genrom_ejtag

#!/usr/bin/perl 
my ($myedata,$myend,$initmips,$mystart);
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);
 }
}
printf(<< "END"
void stringserial(char *msg);
void realinitmips(unsigned int msize);
void enable_cache()
{
	    __asm__ volatile(
		".set mips2;\\n" \\
"        mfc0   \$4,\$16;\\n" \\
"        and    \$4,\$4,0xfffffff8;\\n" \\
"        or     \$4,\$4,0x3;\\n" \\
"        mtc0   \$4,\$16;\\n" \\
"		.set mips0;\\n"
		::
		:"\$4"
		);
}

#ifndef NOCACHE2
void flush_cache2()
{
asm volatile(\
"	mfc0	\$3, \$15;			# read processor ID register;\\n" \\
" 	li		\$2, 0x6303;				#godson2f prid;\\n" \\
" 	beq		\$2, \$3, godson_2f;\\n" \\
" 	nop;\\n" \\
"	li		\$2, 0x6302;				#godson2e prid;\\n" \\
"	bne	\$2, \$3,11f ;\\n" \\
"	nop;\\n" \\
"# godson2e;\\n" \\
" godson_2f: " \\
"	li	  \$2, 0x80000000;\\n" \\
"   addu  \$3,\$2,512*1024;\\n" \\
"10:\\n" \\
"	cache	3, 0(\$2);\\n" \\
"	cache	3, 1(\$2);\\n" \\
"	cache	3, 2(\$2);\\n" \\
"	cache	3, 3(\$2);\\n" \\
"	addu	\$2, 32;\\n" \\
"	bne	    \$2,\$3, 10b;\\n" \\
"	nop;\\n" \\
"11:\\n" \\
:::"\$2","\$3"
);
}
#else
void flush_cache()
{

#ifndef WAYBIT
#define WAYBIT 0
#endif
#define WAY__(x) #x
#define WAY_(x,y) WAY__((x<<y))
#define WAY(x) WAY_(x,WAYBIT)
asm volatile(\
"		.set mips3;\\n" \\
"        li    \$5,0x80000000;\\n" \\
"        addu  \$6,\$5,16384;\\n" \\
"1:\\n" \\
"        cache  1," WAY(0) "(\$5);\\n" \\
"        cache  1," WAY(1) "(\$5);\\n" \\
"        cache  1," WAY(2) "(\$5);\\n" \\
"        cache  1," WAY(3) "(\$5);\\n" \\
"        cache  0," WAY(0) "(\$5);\\n" \\
"        cache  0," WAY(1) "(\$5);\\n" \\
"        cache  0," WAY(2) "(\$5);\\n" \\
"        cache  0," WAY(3) "(\$5);\\n" \\
"        add    \$5,\$5,32;\\n" \\
"        bne    \$5,\$6,1b;\\n" \\
"        nop;\\n" \\ 
"		.set mips0;\\n" \\
::: "\$5","\$6");
}
#endif
void initmips(unsigned int msize,int dmsize,int dctrl)
{
    long *edata=(void *)$myedata;
    long *end=(void *)$myend;
    long *p;
	int debug=(msize==0);
	CPU_TLBClear();
    stringserial("Uncompressing Bios");
    if(!debug||dctrl&1)enable_cache();
	while(1)
	{
    if(run_unzip(biosdata,$mystart)>=0)break;
	}
    stringserial("OK,Booting Bios\\r\\n");
    for(p=edata;p<=end;p++)
    {
        *p=0;
    }
	memset($mystart-0x1000,0,0x1000);//$mystart-0x1000 for frame(registers),memset for pretty
#ifdef NOCACHE2
	flush_cache();
#else
	flush_cache2();
#endif
    realinitmips(debug?dmsize:msize);
}


void realinitmips(unsigned int msize)
{
	     asm ("li  \$29,$mystart-0x4000;\\n" \\
"		       li \$2,$myinitmips;\\n" \\
"			   move \$4,\%0;\\n" \\
"			   mtc0 \$2,\$24;\\n" \\
"			   .word 0x4200001f;\\n" \\
"			   nop;\\n" \\
"			  1: b 1b;nop;\\n" \\
          :
          : "r" (msize)
          : "\$29", "\$2","\$4");

}
END
);