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| author | Kevin | 2014-11-15 09:58:27 +0800 |
|---|---|---|
| committer | Kevin | 2014-11-15 09:58:27 +0800 |
| commit | 392e8802486cb573b916e746010e141a75f507e6 (patch) | |
| tree | 50029aca02c81f087b90336e670b44e510782330 /ANDROID_3.4.5/arch/powerpc/boot/virtex405-head.S | |
| download | FOSSEE-netbook-kernel-source-392e8802486cb573b916e746010e141a75f507e6.tar.gz FOSSEE-netbook-kernel-source-392e8802486cb573b916e746010e141a75f507e6.tar.bz2 FOSSEE-netbook-kernel-source-392e8802486cb573b916e746010e141a75f507e6.zip | |
init android origin source code
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/boot/virtex405-head.S')
| -rw-r--r-- | ANDROID_3.4.5/arch/powerpc/boot/virtex405-head.S | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/boot/virtex405-head.S b/ANDROID_3.4.5/arch/powerpc/boot/virtex405-head.S new file mode 100644 index 00000000..3edb13f9 --- /dev/null +++ b/ANDROID_3.4.5/arch/powerpc/boot/virtex405-head.S @@ -0,0 +1,30 @@ +#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 |