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 /*
   6  * The cache doesn't need to be flushed when TLB entries change when
   7  * the cache is mapped to physical memory, not virtual memory
   8  */
   9 #ifndef flush_cache_all
  10 static inline void flush_cache_all(void)
  11 {
  12 }
  13 #endif
  14
  15 #ifndef flush_cache_mm
  16 static inline void flush_cache_mm(struct mm_struct *mm)
  17 {
  18 }
  19 #endif
  20
  21 #ifndef flush_cache_dup_mm
  22 static inline void flush_cache_dup_mm(struct mm_struct *mm)
  23 {
  24 }
  25 #endif
  26
  27 #ifndef flush_cache_range
  28 static inline void flush_cache_range(struct vm_area_struct *vma,
  29                                      unsigned long start,
  30                                      unsigned long end)
  31 {
  32 }
  33 #endif
  34
  35 #ifndef flush_cache_page
  36 static inline void flush_cache_page(struct vm_area_struct *vma,
  37                                     unsigned long vmaddr,
  38                                     unsigned long pfn)
  39 {
  40 }
  41 #endif
  42
  43 #ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
  44 static inline void flush_dcache_page(struct page *page)
  45 {
  46 }
  47 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
  48 #endif
  49
  50
  51 #ifndef flush_dcache_mmap_lock
  52 static inline void flush_dcache_mmap_lock(struct address_space *mapping)
  53 {
  54 }
  55 #endif
  56
  57 #ifndef flush_dcache_mmap_unlock
  58 static inline void flush_dcache_mmap_unlock(struct address_space *mapping)
  59 {
  60 }
  61 #endif
  62
  63 #ifndef flush_icache_range
  64 static inline void flush_icache_range(unsigned long start, unsigned long end)
  65 {
  66 }
  67 #endif
  68
  69 #ifndef flush_icache_user_range
  70 #define flush_icache_user_range flush_icache_range
  71 #endif
  72
  73 #ifndef flush_icache_page
  74 static inline void flush_icache_page(struct vm_area_struct *vma,
  75                                      struct page *page)
  76 {
  77 }
  78 #endif
  79
  80 #ifndef flush_icache_user_page
  81 static inline void flush_icache_user_page(struct vm_area_struct *vma,
  82                                            struct page *page,
  83                                            unsigned long addr, int len)
  84 {
  85 }
  86 #endif
  87
  88 #ifndef flush_cache_vmap
  89 static inline void flush_cache_vmap(unsigned long start, unsigned long end)
  90 {
  91 }
  92 #endif
  93
  94 #ifndef flush_cache_vunmap
  95 static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
  96 {
  97 }
  98 #endif
  99
 100 #ifndef copy_to_user_page
 101 #define copy_to_user_page(vma, page, vaddr, dst, src, len)      \
 102         do { \
 103                 memcpy(dst, src, len); \
 104                 flush_icache_user_page(vma, page, vaddr, len); \
 105         } while (0)
 106 #endif
 107
 108 #ifndef copy_from_user_page
 109 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
 110         memcpy(dst, src, len)
 111 #endif
 112
 113 #endif /* _ASM_GENERIC_CACHEFLUSH_H */