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| author | Greg Watson <jarrah@users.sourceforge.net> | 2004-03-07 17:28:59 +0000 |
|---|---|---|
| committer | Greg Watson <jarrah@users.sourceforge.net> | 2004-03-07 17:28:59 +0000 |
| commit | ac00a0a7e2a4a7dccf4cde3f4d7550c07df216a2 (patch) | |
| tree | 39c236f7df74b5cdfa5ad2db5832fefc287cf2ae /src/cpu/ppc/mpc74xx/cache.S | |
| parent | dd9651017a39bbe64ed7de8f91df7e51ce7b374d (diff) | |
fix caching problem
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1380 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/cpu/ppc/mpc74xx/cache.S')
| -rw-r--r-- | src/cpu/ppc/mpc74xx/cache.S | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/cpu/ppc/mpc74xx/cache.S b/src/cpu/ppc/mpc74xx/cache.S new file mode 100644 index 0000000000..237b178bdf --- /dev/null +++ b/src/cpu/ppc/mpc74xx/cache.S @@ -0,0 +1,23 @@ +#define ASM +#include "ppcreg.h" +#include <ppc_asm.tmpl> + +#define NUM_CACHE_LINES 128*8 +#define L1_CACHE_LINE_SIZE 32 +#define cache_flush_buffer 0x1000 + +/* + * Flush data cache + * Do this by just reading lots of stuff into the cache. + */ +.globl flush_dcache +flush_dcache: + lis r3,cache_flush_buffer@h + ori r3,r3,cache_flush_buffer@l + li r4,NUM_CACHE_LINES + mtctr r4 +0: lwz r4,0(r3) + addi r3,r3,L1_CACHE_LINE_SIZE + bdnz 0b + blr + |