include/asm-generic/cacheflush.h

   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 static 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
  59 void flush_dcache_folio(struct folio *folio);
  60 #endif
  61
  62 #ifndef flush_dcache_mmap_lock
  63 static inline void flush_dcache_mmap_lock(struct address_space *mapping)
  64 {
  65 }
  66 #endif
  67
  68 #ifndef flush_dcache_mmap_unlock
  69 static inline void flush_dcache_mmap_unlock(struct address_space *mapping)
  70 {
  71 }
  72 #endif
  73
  74 #ifndef flush_icache_range
  75 static 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
  85 static 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
  92 static 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
 100 static inline void flush_cache_vmap(unsigned long start, unsigned long end)
 101 {
 102 }
 103 #endif
 104
 105 #ifndef flush_cache_vunmap
 106 static 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 */