Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_GENERIC_CACHEFLUSH_H
3#define _ASM_GENERIC_CACHEFLUSH_H
4
5/*
6 * The cache doesn't need to be flushed when TLB entries change when
7 * the cache is mapped to physical memory, not virtual memory
8 */
9#ifndef flush_cache_all
10static inline void flush_cache_all(void)
11{
12}
13#endif
14
15#ifndef flush_cache_mm
16static inline void flush_cache_mm(struct mm_struct *mm)
17{
18}
19#endif
20
21#ifndef flush_cache_dup_mm
22static inline void flush_cache_dup_mm(struct mm_struct *mm)
23{
24}
25#endif
26
27#ifndef flush_cache_range
28static inline void flush_cache_range(struct vm_area_struct *vma,
29 unsigned long start,
30 unsigned long end)
31{
32}
33#endif
34
35#ifndef flush_cache_page
36static inline void flush_cache_page(struct vm_area_struct *vma,
37 unsigned long vmaddr,
38 unsigned long pfn)
39{
40}
41#endif
42
43#ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
44static inline void flush_dcache_page(struct page *page)
45{
46}
47#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
48#endif
49
50
51#ifndef flush_dcache_mmap_lock
52static inline void flush_dcache_mmap_lock(struct address_space *mapping)
53{
54}
55#endif
56
57#ifndef flush_dcache_mmap_unlock
58static inline void flush_dcache_mmap_unlock(struct address_space *mapping)
59{
60}
61#endif
62
63#ifndef flush_icache_range
64static inline void flush_icache_range(unsigned long start, unsigned long end)
65{
66}
67#endif
68
69#ifndef flush_icache_user_range
70#define flush_icache_user_range flush_icache_range
71#endif
72
73#ifndef flush_icache_page
74static inline void flush_icache_page(struct vm_area_struct *vma,
75 struct page *page)
76{
77}
78#endif
79
80#ifndef flush_icache_user_page
81static inline void flush_icache_user_page(struct vm_area_struct *vma,
82 struct page *page,
83 unsigned long addr, int len)
84{
85}
86#endif
87
88#ifndef flush_cache_vmap
89static inline void flush_cache_vmap(unsigned long start, unsigned long end)
90{
91}
92#endif
93
94#ifndef flush_cache_vunmap
95static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
96{
97}
98#endif
99
100#ifndef copy_to_user_page
101#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
102 do { \
103 memcpy(dst, src, len); \
104 flush_icache_user_page(vma, page, vaddr, len); \
105 } while (0)
106#endif
107
108#ifndef copy_from_user_page
109#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
110 memcpy(dst, src, len)
111#endif
112
113#endif /* _ASM_GENERIC_CACHEFLUSH_H */