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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/h8300/lib/romfs.S
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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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