1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_GENERIC_CACHEFLUSH_H 3 #define _ASM_GENERIC_CACHEFLUSH_H 4 5 struct mm_struct; 6 struct vm_area_struct; 7 struct page; 8 struct 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 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 ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 49 static inline void flush_dcache_page(struct page *page) 50 { 51 } 52 53 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 54 #endif 55 56 #ifndef flush_dcache_mmap_lock 57 static inline void flush_dcache_mmap_lock(struct address_space *mapping) 58 { 59 } 60 #endif 61 62 #ifndef flush_dcache_mmap_unlock 63 static inline void flush_dcache_mmap_unlock(struct address_space *mapping) 64 { 65 } 66 #endif 67 68 #ifndef flush_icache_range 69 static inline void flush_icache_range(unsigned long start, unsigned long end) 70 { 71 } 72 #endif 73 74 #ifndef flush_icache_user_range 75 #define flush_icache_user_range flush_icache_range 76 #endif 77 78 #ifndef flush_icache_page 79 static inline void flush_icache_page(struct vm_area_struct *vma, 80 struct page *page) 81 { 82 } 83 #endif 84 85 #ifndef flush_icache_user_page 86 static inline void flush_icache_user_page(struct vm_area_struct *vma, 87 struct page *page, 88 unsigned long addr, int len) 89 { 90 } 91 #endif 92 93 #ifndef flush_cache_vmap 94 static inline void flush_cache_vmap(unsigned long start, unsigned long end) 95 { 96 } 97 #endif 98 99 #ifndef flush_cache_vunmap 100 static inline void flush_cache_vunmap(unsigned long start, unsigned long end) 101 { 102 } 103 #endif 104 105 #ifndef copy_to_user_page 106 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ 107 do { \ 108 memcpy(dst, src, len); \ 109 flush_icache_user_page(vma, page, vaddr, len); \ 110 } while (0) 111 #endif 112 113 #ifndef copy_from_user_page 114 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ 115 memcpy(dst, src, len) 116 #endif 117 118 #endif /* _ASM_GENERIC_CACHEFLUSH_H */ 119