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[POWERPC] powerpc: Reduce default cacheline size to 64 bytes

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Reduce default cacheline size on 64-bit powerpc from 128 bytes to 64.
This is the architected minimum. In most cases we'll still end up using
cache line information from the device tree, but defaults are used during
early boot and doing a few dcbst/icbi's too many there won't do any harm.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Olof Johansson 2006-09-06 14:34:41 -05:00 committed by Paul Mackerras
parent b7e89214aa
commit 5a2fe38d28
2 changed files with 5 additions and 5 deletions
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2
arch/powerpc/kernel/head_64.S
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@ -1748,7 +1748,7 @@ _STATIC(__after_prom_start)
_GLOBAL(copy_and_flush)
addi r5,r5,-8
addi r6,r6,-8
4: li r0,16 /* Use the least common */
4: li r0,8 /* Use the smallest common */
/* denominator cache line */
/* size. This results in */
/* extra cache line flushes */

8
arch/powerpc/kernel/setup_64.c
View file

@ -78,10 +78,10 @@ u64 ppc64_pft_size;
* before we've read this from the device tree.
*/
struct ppc64_caches ppc64_caches = {
.dline_size = 0x80,
.log_dline_size = 7,
.iline_size = 0x80,
.log_iline_size = 7
.dline_size = 0x40,
.log_dline_size = 6,
.iline_size = 0x40,
.log_iline_size = 6
};
EXPORT_SYMBOL_GPL(ppc64_caches);