#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 |