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| author | Deepak Saxena <dsaxena@plexity.net> | 2006-05-31 16:14:05 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-05-31 16:27:44 -0700 |
| commit | 5cedae9ca752a43cfb1074907d12c9f01fbebd45 (patch) | |
| tree | 30bff4b8211984984c6614b7fc530ff916630d6b /include | |
| parent | 29f767a254be8fd44fb5d2b5a48e9cda8399c4ea (diff) | |
| download | linux-5cedae9ca752a43cfb1074907d12c9f01fbebd45.tar.gz linux-5cedae9ca752a43cfb1074907d12c9f01fbebd45.tar.bz2 linux-5cedae9ca752a43cfb1074907d12c9f01fbebd45.zip | |
[PATCH] ARM: Fix XScale PMD setting
The ARM Architecture Reference Manual lists bit 4 of the PMD as "implementation
defined" and it must be set to zero on Intel XScale CPUs or the cache does
not behave properly. Found by Mike Rapoport while debugging a flash issue
on the PXA255:
http://marc.10east.com/?l=linux-arm-kernel&m=114845287600782&w=1
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-arm/system.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/asm-arm/system.h b/include/asm-arm/system.h index 95b3abf4851b..7c9568d30307 100644 --- a/include/asm-arm/system.h +++ b/include/asm-arm/system.h @@ -127,6 +127,12 @@ static inline int cpu_is_xsc3(void) } #endif +#if !defined(CONFIG_CPU_XSCALE) && !defined(CONFIG_CPU_XSC3) +#define cpu_is_xscale() 0 +#else +#define cpu_is_xscale() 1 +#endif + #define set_cr(x) \ __asm__ __volatile__( \ "mcr p15, 0, %0, c1, c0, 0 @ set CR" \ |