1#ifndef _M68KNOMMU_CACHEFLUSH_H
  2#define _M68KNOMMU_CACHEFLUSH_H
  3
  4/*
  5 * (C) Copyright 2000-2010, Greg Ungerer <gerg@snapgear.com>
  6 */
  7#include <linux/mm.h>
  8#include <asm/mcfsim.h>
  9
 10#define flush_cache_all()			__flush_cache_all()
 11#define flush_cache_mm(mm)			do { } while (0)
 12#define flush_cache_dup_mm(mm)			do { } while (0)
 13#define flush_cache_range(vma, start, end)	do { } while (0)
 14#define flush_cache_page(vma, vmaddr)		do { } while (0)
 15#define flush_dcache_range(start, len)		__flush_dcache_all()
 16#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
 17#define flush_dcache_page(page)			do { } while (0)
 18#define flush_dcache_mmap_lock(mapping)		do { } while (0)
 19#define flush_dcache_mmap_unlock(mapping)	do { } while (0)
 20#define flush_icache_range(start, len)		__flush_icache_all()
 21#define flush_icache_page(vma,pg)		do { } while (0)
 22#define flush_icache_user_range(vma,pg,adr,len)	do { } while (0)
 23#define flush_cache_vmap(start, end)		do { } while (0)
 24#define flush_cache_vunmap(start, end)		do { } while (0)
 25
 26#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
 27	memcpy(dst, src, len)
 28#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
 29	memcpy(dst, src, len)
 30
 31void mcf_cache_push(void);
 32
 33static inline void __clear_cache_all(void)
 34{
 35#ifdef CACHE_INVALIDATE
 36	__asm__ __volatile__ (
 37		"movel	%0, %%d0\n\t"
 38		"movec	%%d0, %%CACR\n\t"
 39		"nop\n\t"
 40		: : "i" (CACHE_INVALIDATE) : "d0" );
 41#endif
 42}
 43
 44static inline void __flush_cache_all(void)
 45{
 46#ifdef CACHE_PUSH
 47	mcf_cache_push();
 48#endif
 49	__clear_cache_all();
 50}
 51
 52/*
 53 * Some ColdFire parts implement separate instruction and data caches,
 54 * on those we should just flush the appropriate cache. If we don't need
 55 * to do any specific flushing then this will be optimized away.
 56 */
 57static inline void __flush_icache_all(void)
 58{
 59#ifdef CACHE_INVALIDATEI
 60	__asm__ __volatile__ (
 61		"movel	%0, %%d0\n\t"
 62		"movec	%%d0, %%CACR\n\t"
 63		"nop\n\t"
 64		: : "i" (CACHE_INVALIDATEI) : "d0" );
 65#endif
 66}
 67
 68static inline void __flush_dcache_all(void)
 69{
 70#ifdef CACHE_PUSH
 71	mcf_cache_push();
 72#endif
 73#ifdef CACHE_INVALIDATED
 74	__asm__ __volatile__ (
 75		"movel	%0, %%d0\n\t"
 76		"movec	%%d0, %%CACR\n\t"
 77		"nop\n\t"
 78		: : "i" (CACHE_INVALIDATED) : "d0" );
 79#else
 80	/* Flush the wrtite buffer */
 81	__asm__ __volatile__ ( "nop" );
 82#endif
 83}
 84
 85/*
 86 * Push cache entries at supplied address. We want to write back any dirty
 87 * data and the invalidate the cache lines associated with this address.
 88 */
 89static inline void cache_push(unsigned long paddr, int len)
 90{
 91	__flush_cache_all();
 92}
 93
 94/*
 95 * Clear cache entries at supplied address (that is don't write back any
 96 * dirty data).
 97 */
 98static inline void cache_clear(unsigned long paddr, int len)
 99{
100	__clear_cache_all();
101}
102
103#endif /* _M68KNOMMU_CACHEFLUSH_H */