5113f6f70
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kernel add
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#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
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