diff options
Diffstat (limited to 'arch/m68k/include/asm/cacheflush_no.h')
-rw-r--r-- | arch/m68k/include/asm/cacheflush_no.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/cacheflush_no.h b/arch/m68k/include/asm/cacheflush_no.h new file mode 100644 index 0000000000..2731f07e7b --- /dev/null +++ b/arch/m68k/include/asm/cacheflush_no.h @@ -0,0 +1,86 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _M68KNOMMU_CACHEFLUSH_H +#define _M68KNOMMU_CACHEFLUSH_H + +/* + * (C) Copyright 2000-2010, Greg Ungerer <gerg@snapgear.com> + */ +#include <linux/mm.h> +#include <asm/mcfsim.h> + +#define flush_cache_all() __flush_cache_all() +#define flush_dcache_range(start, len) __flush_dcache_all() +#define flush_icache_range(start, len) __flush_icache_all() + +void mcf_cache_push(void); + +static inline void __clear_cache_all(void) +{ +#ifdef CACHE_INVALIDATE + __asm__ __volatile__ ( + "movec %0, %%CACR\n\t" + "nop\n\t" + : : "r" (CACHE_INVALIDATE) ); +#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 + * to do any specific flushing then this will be optimized away. + */ +static inline void __flush_icache_all(void) +{ +#ifdef CACHE_INVALIDATEI + __asm__ __volatile__ ( + "movec %0, %%CACR\n\t" + "nop\n\t" + : : "r" (CACHE_INVALIDATEI) ); +#endif +} + +static inline void __flush_dcache_all(void) +{ +#ifdef CACHE_PUSH + mcf_cache_push(); +#endif +#ifdef CACHE_INVALIDATED + __asm__ __volatile__ ( + "movec %0, %%CACR\n\t" + "nop\n\t" + : : "r" (CACHE_INVALIDATED) ); +#else + /* Flush the write buffer */ + __asm__ __volatile__ ( "nop" ); +#endif +} + +/* + * Push cache entries at supplied address. We want to write back any dirty + * data and then 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(); +} + +#include <asm-generic/cacheflush.h> + +#endif /* _M68KNOMMU_CACHEFLUSH_H */ |