1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_GENERIC_CACHEFLUSH_H
3 #define _ASM_GENERIC_CACHEFLUSH_H
4
5 #include <linux/instrumented.h>
6
7 struct mm_struct;
8 struct vm_area_struct;
9 struct page;
10 struct address_space;
11
12 /*
13 * The cache doesn't need to be flushed when TLB entries change when
14 * the cache is mapped to physical memory, not virtual memory
15 */
16 #ifndef flush_cache_all
17 static inline void flush_cache_all(void)
18 {
19 }
20 #endif
21
22 #ifndef flush_cache_mm
23 static inline void flush_cache_mm(struct mm_struct *mm)
24 {
25 }
26 #endif
27
28 #ifndef flush_cache_dup_mm
29 static inline void flush_cache_dup_mm(struct mm_struct *mm)
30 {
31 }
32 #endif
33
34 #ifndef flush_cache_range
35 static inline void flush_cache_range(struct vm_area_struct *vma,
36 unsigned long start,
37 unsigned long end)
38 {
39 }
40 #endif
41
42 #ifndef flush_cache_page
43 static inline void flush_cache_page(struct vm_area_struct *vma,
44 unsigned long vmaddr,
45 unsigned long pfn)
46 {
47 }
48 #endif
49
50 #ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
51 static inline void flush_dcache_page(struct page *page)
52 {
53 }
54
55 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
56 #endif
57
58 #ifndef flush_dcache_mmap_lock
59 static inline void flush_dcache_mmap_lock(struct address_space *mapping)
60 {
61 }
62 #endif
63
64 #ifndef flush_dcache_mmap_unlock
65 static inline void flush_dcache_mmap_unlock(struct address_space *mapping)
66 {
67 }
68 #endif
69
70 #ifndef flush_icache_range
71 static inline void flush_icache_range(unsigned long start, unsigned long end)
72 {
73 }
74 #endif
75
76 #ifndef flush_icache_user_range
77 #define flush_icache_user_range flush_icache_range
78 #endif
79
80 #ifndef flush_icache_user_page
81 static 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
89 static inline void flush_cache_vmap(unsigned long start, unsigned long end)
90 {
91 }
92 #endif
93
94 #ifndef flush_cache_vmap_early
95 static inline void flush_cache_vmap_early(unsigned long start, unsigned long end)
96 {
97 }
98 #endif
99
100 #ifndef flush_cache_vunmap
101 static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
102 {
103 }
104 #endif
105
106 #ifndef copy_to_user_page
107 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
108 do { \
109 instrument_copy_to_user((void __user *)dst, src, len); \
110 memcpy(dst, src, len); \
111 flush_icache_user_page(vma, page, vaddr, len); \
112 } while (0)
113 #endif
114
115
116 #ifndef copy_from_user_page
117 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
118 do { \
119 instrument_copy_from_user_before(dst, (void __user *)src, \
120 len); \
121 memcpy(dst, src, len); \
122 instrument_copy_from_user_after(dst, (void __user *)src, len, \
123 0); \
124 } while (0)
125 #endif
126
127 #endif /* _ASM_GENERIC_CACHEFLUSH_H */
128
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