diff options
Diffstat (limited to 'src/cpu/i386/reset16.inc')
| -rw-r--r-- | src/cpu/i386/reset16.inc | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/cpu/i386/reset16.inc b/src/cpu/i386/reset16.inc new file mode 100644 index 0000000000..7c911d9ff2 --- /dev/null +++ b/src/cpu/i386/reset16.inc @@ -0,0 +1,27 @@ + .section ".reset" + .code16 +.globl EXT(reset_vector) +EXT(reset_vector): +#if _ROMBASE >= 0xffff0000 + /* Hmm. + * _start_offset is the low 16 bits of _start. + * Theoretically we should have problems but it compiles + * and links properly with binutils 2.9.5 & 2.10.90 + * This is probably a case that needs fixing in binutils. + * And then we can just use _start. + * We also need something like the assume directive in + * other assemblers to tell it where the segment registers + * are pointing in memory right now. + */ + jmp EXT(_start_offset) +#elif (_ROMBASE < 0x100000) + ljmp $((_ROMBASE & 0xf0000)>>4),$EXT(_start_offset); +#else +#error _ROMBASE is an unsupported value +#endif + + . = 0x8; + .code32 + jmp EXT(protected_start) + + .previous |