| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 */ |