1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_CACHEFLUSH_H
3 #define __ASM_CACHEFLUSH_H
4 
5 /* Keep includes the same across arches.  */
6 #include <linux/mm.h>
7 
8 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
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
15 static inline void flush_cache_all(void)
16 {
17 }
18 #endif
19 
20 #ifndef flush_cache_mm
21 static inline void flush_cache_mm(struct mm_struct *mm)
22 {
23 }
24 #endif
25 
26 #ifndef flush_cache_dup_mm
27 static inline void flush_cache_dup_mm(struct mm_struct *mm)
28 {
29 }
30 #endif
31 
32 #ifndef flush_cache_range
33 static 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
41 static 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 flush_dcache_page
49 static inline void flush_dcache_page(struct page *page)
50 {
51 }
52 #endif
53 
54 #ifndef flush_dcache_mmap_lock
55 static inline void flush_dcache_mmap_lock(struct address_space *mapping)
56 {
57 }
58 #endif
59 
60 #ifndef flush_dcache_mmap_unlock
61 static inline void flush_dcache_mmap_unlock(struct address_space *mapping)
62 {
63 }
64 #endif
65 
66 #ifndef flush_icache_range
67 static inline void flush_icache_range(unsigned long start, unsigned long end)
68 {
69 }
70 #endif
71 
72 #ifndef flush_icache_page
73 static inline void flush_icache_page(struct vm_area_struct *vma,
74 				     struct page *page)
75 {
76 }
77 #endif
78 
79 #ifndef flush_icache_user_range
80 static inline void flush_icache_user_range(struct vm_area_struct *vma,
81 					   struct page *page,
82 					   unsigned long addr, int len)
83 {
84 }
85 #endif
86 
87 #ifndef flush_cache_vmap
88 static inline void flush_cache_vmap(unsigned long start, unsigned long end)
89 {
90 }
91 #endif
92 
93 #ifndef flush_cache_vunmap
94 static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
95 {
96 }
97 #endif
98 
99 #ifndef copy_to_user_page
100 #define copy_to_user_page(vma, page, vaddr, dst, src, len)	\
101 	do { \
102 		memcpy(dst, src, len); \
103 		flush_icache_user_range(vma, page, vaddr, len); \
104 	} while (0)
105 #endif
106 
107 #ifndef copy_from_user_page
108 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
109 	memcpy(dst, src, len)
110 #endif
111 
112 #endif /* __ASM_CACHEFLUSH_H */
113