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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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