include/asm-generic/cacheflush.h

   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 */