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m68knommu: reorganize the no-MMU cache flushing to match m68k

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Introduce cache_push() and cache_clear() functions for the non-MMU m68k
devices. With these in place we can more easily merge some of the common
m68k arch code.

In particular by reorganizing the __flush_cache_all() code and separating
the cache push and clear functions it becomes trivial to implement the
new cache_push() and cache_clear() functions.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
This commit is contained in:
Greg Ungerer
2012-05-02 17:02:21 +10:00
parent 453549d2e5
commit 1744bd921c
1 changed files with 28 additions and 4 deletions
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32
arch/m68k/include/asm/cacheflush_no.h
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@@ -30,11 +30,8 @@
void mcf_cache_push(void); void mcf_cache_push(void);
static inline void __flush_cache_all(void) static inline void __clear_cache_all(void)
{ {
#ifdef CACHE_PUSH
mcf_cache_push();
#endif
#ifdef CACHE_INVALIDATE #ifdef CACHE_INVALIDATE
__asm__ __volatile__ ( __asm__ __volatile__ (
"movel %0, %%d0\n\t" "movel %0, %%d0\n\t"
@@ -44,6 +41,14 @@ static inline void __flush_cache_all(void)
#endif #endif
} }
static inline void __flush_cache_all(void)
{
#ifdef CACHE_PUSH
mcf_cache_push();
#endif
__clear_cache_all();
}
/* /*
* Some ColdFire parts implement separate instruction and data caches, * Some ColdFire parts implement separate instruction and data caches,
* on those we should just flush the appropriate cache. If we don't need * on those we should just flush the appropriate cache. If we don't need
@@ -76,4 +81,23 @@ static inline void __flush_dcache_all(void)
__asm__ __volatile__ ( "nop" ); __asm__ __volatile__ ( "nop" );
#endif #endif
} }
/*
* Push cache entries at supplied address. We want to write back any dirty
* data and the invalidate the cache lines associated with this address.
*/
static inline void cache_push(unsigned long paddr, int len)
{
__flush_cache_all();
}
/*
* Clear cache entries at supplied address (that is don't write back any
* dirty data).
*/
static inline void cache_clear(unsigned long paddr, int len)
{
__clear_cache_all();
}
#endif /* _M68KNOMMU_CACHEFLUSH_H */ #endif /* _M68KNOMMU_CACHEFLUSH_H */