From e86d6b66f5b38680746b2cb71186d90af17f150f Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Wed, 27 Sep 2006 14:20:54 +0900 Subject: sh: prefetch()/prefetchw() support. SH-2/3/4 are able to prefetch, add support for it.. Signed-off-by: Paul Mundt --- include/asm-sh/processor.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/asm-sh/processor.h b/include/asm-sh/processor.h index eeb0f48bb99ead..e99aff706cf7d5 100644 --- a/include/asm-sh/processor.h +++ b/include/asm-sh/processor.h @@ -266,5 +266,18 @@ extern unsigned long get_wchan(struct task_struct *p); #define cpu_sleep() __asm__ __volatile__ ("sleep" : : : "memory") #define cpu_relax() barrier() +#if defined(CONFIG_CPU_SH2A) || defined(CONFIG_CPU_SH3) || \ + defined(CONFIG_CPU_SH4) +#define PREFETCH_STRIDE L1_CACHE_BYTES +#define ARCH_HAS_PREFETCH +#define ARCH_HAS_PREFETCHW +static inline void prefetch(void *x) +{ + __asm__ __volatile__ ("pref @%0\n\t" : : "r" (x) : "memory"); +} + +#define prefetchw(x) prefetch(x) +#endif + #endif /* __KERNEL__ */ #endif /* __ASM_SH_PROCESSOR_H */ -- cgit 1.2.3-korg