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140 lines
2.8 KiB
140 lines
2.8 KiB
#!/usr/bin/perl
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my ($myedata,$myend,$initmips,$mystart,$tgt_putchar);
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open(F,qq(objdump -x $ARGV[0]|));
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while(<F>)
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{
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chomp;
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if(/([0-9a-f]+).+_edata/){
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$myedata=qq(0x$1);
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}
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if(/([0-9a-f]+).+_end$/){
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$myend=qq(0x$1);
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}
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if(/([0-9a-f]+).+initmips$/){
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$myinitmips=qq(0x$1);
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}
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if(/([0-9a-f]+).+\s_start$/){
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$mystart=qq(0x$1);
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}
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if(/([0-9a-f]+).+\stgt_putchar$/){
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$tgt_putchar=qq(0x$1);
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}
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}
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printf(<< "END"
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#define NOMSG
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typedef long long off_t;
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struct callvectors {
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int (*open) (char *, int, int);
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int (*close) (int);
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int (*read) (int, void *, int);
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int (*write) (int, void *, int);
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off_t (*lseek) (int, off_t, int);
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int (*printf) (const char *, ...);
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void (*cacheflush) (void);
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char *(*gets) (char *);
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};
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struct callvectors *cvs;
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void realinitmips(unsigned int msize);
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#ifndef NOCACHE2
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void flush_cache2()
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{
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asm volatile(\
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" mfc0 \$3, \$15 # read processor ID register;" \\
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" li \$2, 0x6303 #godson2f prid;" \\
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" beq \$2, \$3, godson_2f;" \\
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" nop;" \\
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" li \$2, 0x6302 #godson2e prid;" \\
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" bne \$2, \$3,11f ;"\\
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" nop;" \\
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"# godson2e;" \\
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"godson_2f:;" \\
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" li \$2, 0x80000000;" \\
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" addu \$3,\$2,512*1024;" \\
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"10:;" \\
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" cache 3, 0(\$2);" \\
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" cache 3, 1(\$2);" \\
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" cache 3, 2(\$2);" \\
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" cache 3, 3(\$2);" \\
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" addu \$2, 32;" \\
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" bne \$2,\$3, 10b;" \\
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" nop;" \\
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"11:;" \\
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::
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:"\$2","\$3"
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);
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}
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#else
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void flush_cache()
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{
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asm volatile(\
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" .set mips3;;" \\
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" li \$5,0x80000000;" \\
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" addu \$6,\$5,16384;" \\
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"1:;" \\
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" cache 1,0(\$5);" \\
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" cache 1,1(\$5);" \\
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" cache 1,2(\$5);" \\
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" cache 1,3(\$5);" \\
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" cache 0,(\$5);" \\
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" add \$5,\$5,32;" \\
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" bne \$5,\$6,1b;" \\
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" nop;" \\
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" .set mips0;;" \\
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::
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: "\$5","\$6");
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}
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#endif
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void initmips(unsigned int msize,struct callvectors *cv)
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{
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int *edata=(void *)$myedata;
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int *end=(void *)$myend;
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int *p;
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cvs=cv;
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tgt_puts("Uncompressing Bios");
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run_unzip(biosdata,$mystart);
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tgt_puts("OK,Booting Bios\\r\\n");
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for(p=edata;p<=end;p++)
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{
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*p=0;
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}
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memset($mystart-0x1000,0,0x1000);//$mystart-0x1000 for frame(registers),memset for pretty
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// cv->cacheflush();
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tgt_puts("flush_cache...");
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#ifdef NOCACHE2
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flush_cache();
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#else
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flush_cache2();
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#endif
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tgt_puts("done,boot now\\r\\n");
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realinitmips(msize);
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}
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void realinitmips(unsigned int msize)
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{
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asm ("li \$29,$mystart-0x4000;" \
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"li \$2,$myinitmips;" \
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"move \$4,\%0;" \
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"jalr \$2;" \
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" nop;" \
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"1: b 1b;nop;"
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:
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: "r" (msize)
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: "\$29", "\$2","\$4");
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}
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static void (*rom_putchar)(char c)=(${tgt_putchar}-${mystart}+0xffffffffbfc00000);
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void tgt_putchar(char c)
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{
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#ifndef NOMSG
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cvs->printf("%%c",c);
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#endif
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}
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int tgt_puts(char *str)
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{
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#ifndef NOMSG
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cvs->printf("%%s",str);
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#endif
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}
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END
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);
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