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 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
  53 #endif
  54
  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 */