arch/sh/include/asm/cacheflush.h

   1 #ifndef __ASM_SH_CACHEFLUSH_H
   2 #define __ASM_SH_CACHEFLUSH_H
   3
   4 #ifdef __KERNEL__
   5
   6 #include <linux/mm.h>
   7
   8 /*
   9  * Cache flushing:
  10  *
  11  *  - flush_cache_all() flushes entire cache
  12  *  - flush_cache_mm(mm) flushes the specified mm context's cache lines
  13  *  - flush_cache_dup mm(mm) handles cache flushing when forking
  14  *  - flush_cache_page(mm, vmaddr, pfn) flushes a single page
  15  *  - flush_cache_range(vma, start, end) flushes a range of pages
  16  *
  17  *  - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
  18  *  - flush_icache_range(start, end) flushes(invalidates) a range for icache
  19  *  - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
  20  *  - flush_cache_sigtramp(vaddr) flushes the signal trampoline
  21  */
  22 extern void (*local_flush_cache_all)(void *args);
  23 extern void (*local_flush_cache_mm)(void *args);
  24 extern void (*local_flush_cache_dup_mm)(void *args);
  25 extern void (*local_flush_cache_page)(void *args);
  26 extern void (*local_flush_cache_range)(void *args);
  27 extern void (*local_flush_dcache_page)(void *args);
  28 extern void (*local_flush_icache_range)(void *args);
  29 extern void (*local_flush_icache_page)(void *args);
  30 extern void (*local_flush_cache_sigtramp)(void *args);
  31
  32 static inline void cache_noop(void *args) { }
  33
  34 extern void (*__flush_wback_region)(void *start, int size);
  35 extern void (*__flush_purge_region)(void *start, int size);
  36 extern void (*__flush_invalidate_region)(void *start, int size);
  37
  38 extern void flush_cache_all(void);
  39 extern void flush_cache_mm(struct mm_struct *mm);
  40 extern void flush_cache_dup_mm(struct mm_struct *mm);
  41 extern void flush_cache_page(struct vm_area_struct *vma,
  42                                 unsigned long addr, unsigned long pfn);
  43 extern void flush_cache_range(struct vm_area_struct *vma,
  44                                  unsigned long start, unsigned long end);
  45 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  46 extern void flush_dcache_page(struct page *page);
  47 extern void flush_icache_range(unsigned long start, unsigned long end);
  48 extern void flush_icache_page(struct vm_area_struct *vma,
  49                                  struct page *page);
  50 extern void flush_cache_sigtramp(unsigned long address);
  51
  52 struct flusher_data {
  53         struct vm_area_struct *vma;
  54         unsigned long addr1, addr2;
  55 };
  56
  57 #define ARCH_HAS_FLUSH_ANON_PAGE
  58 extern void __flush_anon_page(struct page *page, unsigned long);
  59
  60 static inline void flush_anon_page(struct vm_area_struct *vma,
  61                                    struct page *page, unsigned long vmaddr)
  62 {
  63         if (boot_cpu_data.dcache.n_aliases && PageAnon(page))
  64                 __flush_anon_page(page, vmaddr);
  65 }
  66 static inline void flush_kernel_vmap_range(void *addr, int size)
  67 {
  68         __flush_wback_region(addr, size);
  69 }
  70 static inline void invalidate_kernel_vmap_range(void *addr, int size)
  71 {
  72         __flush_invalidate_region(addr, size);
  73 }
  74
  75 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
  76 static inline void flush_kernel_dcache_page(struct page *page)
  77 {
  78         flush_dcache_page(page);
  79 }
  80
  81 extern void copy_to_user_page(struct vm_area_struct *vma,
  82         struct page *page, unsigned long vaddr, void *dst, const void *src,
  83         unsigned long len);
  84
  85 extern void copy_from_user_page(struct vm_area_struct *vma,
  86         struct page *page, unsigned long vaddr, void *dst, const void *src,
  87         unsigned long len);
  88
  89 #define flush_cache_vmap(start, end)            local_flush_cache_all(NULL)
  90 #define flush_cache_vunmap(start, end)          local_flush_cache_all(NULL)
  91
  92 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  93 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  94
  95 void kmap_coherent_init(void);
  96 void *kmap_coherent(struct page *page, unsigned long addr);
  97 void kunmap_coherent(void *kvaddr);
  98
  99 #define PG_dcache_clean PG_arch_1
 100
 101 void cpu_cache_init(void);
 102
 103 #endif /* __KERNEL__ */
 104 #endif /* __ASM_SH_CACHEFLUSH_H */