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
5struct mm_struct;
6struct vm_area_struct;
7struct page;
8struct address_space;
9
10/*
11 * The cache doesn't need to be flushed when TLB entries change when
12 * the cache is mapped to physical memory, not virtual memory
13 */
14#ifndef flush_cache_all
15static inline void flush_cache_all(void)
16{
17}
18#endif
19
20#ifndef flush_cache_mm
21static inline void flush_cache_mm(struct mm_struct *mm)
22{
23}
24#endif
25
26#ifndef flush_cache_dup_mm
27static inline void flush_cache_dup_mm(struct mm_struct *mm)
28{
29}
30#endif
31
32#ifndef flush_cache_range
33static inline void flush_cache_range(struct vm_area_struct *vma,
34 unsigned long start,
35 unsigned long end)
36{
37}
38#endif
39
40#ifndef flush_cache_page
41static inline void flush_cache_page(struct vm_area_struct *vma,
42 unsigned long vmaddr,
43 unsigned long pfn)
44{
45}
46#endif
47
48#ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
49static inline void flush_dcache_page(struct page *page)
50{
51}
52
53static inline void flush_dcache_folio(struct folio *folio) { }
54#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
55#define ARCH_IMPLEMENTS_FLUSH_DCACHE_FOLIO
56#endif
57
58#ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_FOLIO
59void flush_dcache_folio(struct folio *folio);
60#endif
61
62#ifndef flush_dcache_mmap_lock
63static inline void flush_dcache_mmap_lock(struct address_space *mapping)
64{
65}
66#endif
67
68#ifndef flush_dcache_mmap_unlock
69static inline void flush_dcache_mmap_unlock(struct address_space *mapping)
70{
71}
72#endif
73
74#ifndef flush_icache_range
75static inline void flush_icache_range(unsigned long start, unsigned long end)
76{
77}
78#endif
79
80#ifndef flush_icache_user_range
81#define flush_icache_user_range flush_icache_range
82#endif
83
84#ifndef flush_icache_page
85static inline void flush_icache_page(struct vm_area_struct *vma,
86 struct page *page)
87{
88}
89#endif
90
91#ifndef flush_icache_user_page
92static inline void flush_icache_user_page(struct vm_area_struct *vma,
93 struct page *page,
94 unsigned long addr, int len)
95{
96}
97#endif
98
99#ifndef flush_cache_vmap
100static inline void flush_cache_vmap(unsigned long start, unsigned long end)
101{
102}
103#endif
104
105#ifndef flush_cache_vunmap
106static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
107{
108}
109#endif
110
111#ifndef copy_to_user_page
112#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
113 do { \
114 memcpy(dst, src, len); \
115 flush_icache_user_page(vma, page, vaddr, len); \
116 } while (0)
117#endif
118
119#ifndef copy_from_user_page
120#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
121 memcpy(dst, src, len)
122#endif
123
124#endif /* _ASM_GENERIC_CACHEFLUSH_H */