mirror of https://gitee.com/openkylin/linux.git
58 lines
885 B
ArmAsm
58 lines
885 B
ArmAsm
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/* romfs move to __ebss */
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#include <asm/linkage.h>
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#if defined(__H8300H__)
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.h8300h
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#endif
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#if defined(__H8300S__)
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.h8300s
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#endif
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#define BLKOFFSET 512
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.text
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.globl __move_romfs
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_romfs_sig_len = 8
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__move_romfs:
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mov.l #__sbss,er0
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mov.l #_romfs_sig,er1
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mov.b #_romfs_sig_len,r3l
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1: /* check romfs image */
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mov.b @er0+,r2l
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mov.b @er1+,r2h
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cmp.b r2l,r2h
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bne 2f
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dec.b r3l
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bne 1b
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/* find romfs image */
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mov.l @__sbss+8,er0 /* romfs length(be) */
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mov.l #__sbss,er1
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add.l er0,er1 /* romfs image end */
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mov.l #__ebss,er2
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add.l er0,er2 /* distination address */
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#if defined(CONFIG_INTELFLASH)
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add.l #BLKOFFSET,er2
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#endif
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adds #2,er0
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adds #1,er0
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shlr er0
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shlr er0 /* transfer length */
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1:
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mov.l @er1,er3 /* copy image */
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mov.l er3,@er2
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subs #4,er1
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subs #4,er2
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dec.l #1,er0
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bpl 1b
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2:
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rts
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.section .rodata
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_romfs_sig:
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.ascii "-rom1fs-"
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.end
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