[linux-2.6-block.git] / arch / powerpc / boot / virtex405-head.S

#include "ppc_asm.h"

	.text
	.global _zimage_start
_zimage_start:

	/* PPC errata 213: needed by Virtex-4 FX */
	mfccr0  0
	oris    0,0,0x50000000@h
	mtccr0  0

	/*
	 * Invalidate the data cache if the data cache is turned off.
	 * - The 405 core does not invalidate the data cache on power-up
	 *   or reset but does turn off the data cache. We cannot assume
	 *   that the cache contents are valid.
	 * - If the data cache is turned on this must have been done by
	 *   a bootloader and we assume that the cache contents are
	 *   valid.
	 */
	mfdccr	r9
	cmplwi	r9,0
	bne	2f
	lis	r9,0
	li	r8,256
	mtctr	r8
1:	dccci	r0,r9
	addi	r9,r9,0x20
	bdnz	1b
2:	b	_zimage_start_lib
Commit	Line	Data
d2477b5c GL	1	#include "ppc_asm.h"
	2
	3	.text
	4	.global _zimage_start
	5	_zimage_start:
	6
	7	/* PPC errata 213: needed by Virtex-4 FX */
	8	mfccr0 0
	9	oris 0,0,0x50000000@h
	10	mtccr0 0
	11
	12	/*
	13	* Invalidate the data cache if the data cache is turned off.
	14	* - The 405 core does not invalidate the data cache on power-up
	15	* or reset but does turn off the data cache. We cannot assume
	16	* that the cache contents are valid.
	17	* - If the data cache is turned on this must have been done by
	18	* a bootloader and we assume that the cache contents are
	19	* valid.
	20	*/
	21	mfdccr r9
	22	cmplwi r9,0
	23	bne 2f
	24	lis r9,0
	25	li r8,256
	26	mtctr r8
	27	1: dccci r0,r9
	28	addi r9,r9,0x20
	29	bdnz 1b
	30	2: b _zimage_start_lib