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Commit e86d6b66 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: prefetch()/prefetchw() support. 



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

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent e7be853d

include/asm-sh/processor.h

+13 −0
Original line number Original line Diff line number Diff line
@@ -266,5 +266,18 @@ extern unsigned long get_wchan(struct task_struct *p); 
#define cpu_sleep()	__asm__ __volatile__ ("sleep" : : : "memory")

#define cpu_sleep()	__asm__ __volatile__ ("sleep" : : : "memory")

#define cpu_relax()	barrier()

#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 /* __KERNEL__ */

#endif /* __ASM_SH_PROCESSOR_H */
 
#endif /* __ASM_SH_PROCESSOR_H */