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Commit 1744bd92 authored by Greg Ungerer's avatar Greg Ungerer
Browse files

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



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: default avatarGreg Ungerer <gerg@uclinux.org>
Acked-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
parent 453549d2

arch/m68k/include/asm/cacheflush_no.h

+28 −4
Original line number Diff line number Diff line
@@ -30,11 +30,8 @@ 


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

	__asm__ __volatile__ (

		"movel	%0, %%d0\n\t"
@@ -44,6 +41,14 @@ static inline void __flush_cache_all(void) 
#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,

 * 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" );

#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 */