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		"movec	%0, %%CACR\n\t"
38		"nop\n\t"
39		: : "r" (CACHE_INVALIDATE) );
40#endif
41}
42
43static inline void __flush_cache_all(void)
44{
45#ifdef CACHE_PUSH
46	mcf_cache_push();
47#endif
48	__clear_cache_all();
49}
50
51/*
52 * Some ColdFire parts implement separate instruction and data caches,
53 * on those we should just flush the appropriate cache. If we don't need
54 * to do any specific flushing then this will be optimized away.
55 */
56static inline void __flush_icache_all(void)
57{
58#ifdef CACHE_INVALIDATEI
59	__asm__ __volatile__ (
60		"movec	%0, %%CACR\n\t"
61		"nop\n\t"
62		: : "r" (CACHE_INVALIDATEI) );
63#endif
64}
65
66static inline void __flush_dcache_all(void)
67{
68#ifdef CACHE_PUSH
69	mcf_cache_push();
70#endif
71#ifdef CACHE_INVALIDATED
72	__asm__ __volatile__ (
73		"movec	%0, %%CACR\n\t"
74		"nop\n\t"
75		: : "r" (CACHE_INVALIDATED) );
76#else
77	/* Flush the write buffer */
78	__asm__ __volatile__ ( "nop" );
79#endif
80}
81
82/*
83 * Push cache entries at supplied address. We want to write back any dirty
84 * data and then invalidate the cache lines associated with this address.
85 */
86static inline void cache_push(unsigned long paddr, int len)
87{
88	__flush_cache_all();
89}
90
91/*
92 * Clear cache entries at supplied address (that is don't write back any
93 * dirty data).
94 */
95static inline void cache_clear(unsigned long paddr, int len)
96{
97	__clear_cache_all();
98}
99
100#endif /* _M68KNOMMU_CACHEFLUSH_H */
101