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linux
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 */