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sh: prefetch()/prefetchw() support. 

SH-2/3/4 are able to prefetch, add support for it..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
wifi-calibration
Paul Mundt 2006-09-27 14:20:54 +09:00
parent e7be853df7
commit e86d6b66f5
1 changed files with 13 additions and 0 deletions
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13
include/asm-sh/processor.h
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@ -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 */