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9e730ffac1
m68knommu needs almost no cache flushing routines of its own. Rely on asm-generic/cacheflush.h for the defaults. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Greg Ungerer <gerg@linux-m68k.org> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Link: http://lkml.kernel.org/r/20200515143646.3857579-15-hch@lst.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _M68KNOMMU_CACHEFLUSH_H
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#define _M68KNOMMU_CACHEFLUSH_H
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/*
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* (C) Copyright 2000-2010, Greg Ungerer <gerg@snapgear.com>
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*/
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#include <linux/mm.h>
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#include <asm/mcfsim.h>
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#define flush_cache_all() __flush_cache_all()
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#define flush_dcache_range(start, len) __flush_dcache_all()
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#define flush_icache_range(start, len) __flush_icache_all()
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void mcf_cache_push(void);
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static inline void __clear_cache_all(void)
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{
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#ifdef CACHE_INVALIDATE
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__asm__ __volatile__ (
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"movec %0, %%CACR\n\t"
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"nop\n\t"
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: : "r" (CACHE_INVALIDATE) );
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#endif
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}
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static inline void __flush_cache_all(void)
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{
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#ifdef CACHE_PUSH
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mcf_cache_push();
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#endif
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__clear_cache_all();
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}
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/*
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* Some ColdFire parts implement separate instruction and data caches,
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* on those we should just flush the appropriate cache. If we don't need
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* to do any specific flushing then this will be optimized away.
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*/
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static inline void __flush_icache_all(void)
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{
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#ifdef CACHE_INVALIDATEI
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__asm__ __volatile__ (
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"movec %0, %%CACR\n\t"
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"nop\n\t"
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: : "r" (CACHE_INVALIDATEI) );
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#endif
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}
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static inline void __flush_dcache_all(void)
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{
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#ifdef CACHE_PUSH
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mcf_cache_push();
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#endif
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#ifdef CACHE_INVALIDATED
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__asm__ __volatile__ (
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"movec %0, %%CACR\n\t"
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"nop\n\t"
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: : "r" (CACHE_INVALIDATED) );
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#else
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/* Flush the write buffer */
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__asm__ __volatile__ ( "nop" );
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#endif
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}
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/*
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* Push cache entries at supplied address. We want to write back any dirty
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* data and then invalidate the cache lines associated with this address.
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*/
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static inline void cache_push(unsigned long paddr, int len)
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{
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__flush_cache_all();
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}
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/*
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* Clear cache entries at supplied address (that is don't write back any
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* dirty data).
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*/
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static inline void cache_clear(unsigned long paddr, int len)
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{
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__clear_cache_all();
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}
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#include <asm-generic/cacheflush.h>
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#endif /* _M68KNOMMU_CACHEFLUSH_H */
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