diff options
Diffstat (limited to 'arch/h8300/lib/romfs.S')
| -rw-r--r-- | arch/h8300/lib/romfs.S | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/h8300/lib/romfs.S b/arch/h8300/lib/romfs.S new file mode 100644 index 00000000000..b72f93a47e3 --- /dev/null +++ b/arch/h8300/lib/romfs.S @@ -0,0 +1,58 @@ +/* romfs move to __ebss */ + +#include <asm/linkage.h> +#include <linux/config.h> + +#if defined(__H8300H__) + .h8300h +#endif +#if defined(__H8300S__) + .h8300s +#endif + +#define BLKOFFSET 512 + + .text +.globl __move_romfs +_romfs_sig_len = 8 + +__move_romfs: + mov.l #__sbss,er0 + mov.l #_romfs_sig,er1 + mov.b #_romfs_sig_len,r3l +1: /* check romfs image */ + mov.b @er0+,r2l + mov.b @er1+,r2h + cmp.b r2l,r2h + bne 2f + dec.b r3l + bne 1b + + /* find romfs image */ + mov.l @__sbss+8,er0 /* romfs length(be) */ + mov.l #__sbss,er1 + add.l er0,er1 /* romfs image end */ + mov.l #__ebss,er2 + add.l er0,er2 /* distination address */ +#if defined(CONFIG_INTELFLASH) + add.l #BLKOFFSET,er2 +#endif + adds #2,er0 + adds #1,er0 + shlr er0 + shlr er0 /* transfer length */ +1: + mov.l @er1,er3 /* copy image */ + mov.l er3,@er2 + subs #4,er1 + subs #4,er2 + dec.l #1,er0 + bpl 1b +2: + rts + + .section .rodata +_romfs_sig: + .ascii "-rom1fs-" + + .end |