Linux kernel mirror (for testing)
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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 __flush_cache_all(void)
34{
35#ifdef CACHE_PUSH
36 mcf_cache_push();
37#endif
38#ifdef CACHE_INVALIDATE
39 __asm__ __volatile__ (
40 "movel %0, %%d0\n\t"
41 "movec %%d0, %%CACR\n\t"
42 "nop\n\t"
43 : : "i" (CACHE_INVALIDATE) : "d0" );
44#endif
45}
46
47/*
48 * Some ColdFire parts implement separate instruction and data caches,
49 * on those we should just flush the appropriate cache. If we don't need
50 * to do any specific flushing then this will be optimized away.
51 */
52static inline void __flush_icache_all(void)
53{
54#ifdef CACHE_INVALIDATEI
55 __asm__ __volatile__ (
56 "movel %0, %%d0\n\t"
57 "movec %%d0, %%CACR\n\t"
58 "nop\n\t"
59 : : "i" (CACHE_INVALIDATEI) : "d0" );
60#endif
61}
62
63static inline void __flush_dcache_all(void)
64{
65#ifdef CACHE_PUSH
66 mcf_cache_push();
67#endif
68#ifdef CACHE_INVALIDATED
69 __asm__ __volatile__ (
70 "movel %0, %%d0\n\t"
71 "movec %%d0, %%CACR\n\t"
72 "nop\n\t"
73 : : "i" (CACHE_INVALIDATED) : "d0" );
74#else
75 /* Flush the wrtite buffer */
76 __asm__ __volatile__ ( "nop" );
77#endif
78}
79#endif /* _M68KNOMMU_CACHEFLUSH_H */