arch/sh/include/asm/cacheflush.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_SH_CACHEFLUSH_H
   3 #define __ASM_SH_CACHEFLUSH_H
   4
   5 #ifdef __KERNEL__
   6
   7 #include <linux/mm.h>
   8
   9 /*
  10  * Cache flushing:
  11  *
  12  *  - flush_cache_all() flushes entire cache
  13  *  - flush_cache_mm(mm) flushes the specified mm context's cache lines
  14  *  - flush_cache_dup mm(mm) handles cache flushing when forking
  15  *  - flush_cache_page(mm, vmaddr, pfn) flushes a single page
  16  *  - flush_cache_range(vma, start, end) flushes a range of pages
  17  *
  18  *  - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
  19  *  - flush_icache_range(start, end) flushes(invalidates) a range for icache
  20  *  - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
  21  *  - flush_cache_sigtramp(vaddr) flushes the signal trampoline
  22  */
  23 extern void (*local_flush_cache_all)(void *args);
  24 extern void (*local_flush_cache_mm)(void *args);
  25 extern void (*local_flush_cache_dup_mm)(void *args);
  26 extern void (*local_flush_cache_page)(void *args);
  27 extern void (*local_flush_cache_range)(void *args);
  28 extern void (*local_flush_dcache_page)(void *args);
  29 extern void (*local_flush_icache_range)(void *args);
  30 extern void (*local_flush_icache_page)(void *args);
  31 extern void (*local_flush_cache_sigtramp)(void *args);
  32
  33 static inline void cache_noop(void *args) { }
  34
  35 extern void (*__flush_wback_region)(void *start, int size);
  36 extern void (*__flush_purge_region)(void *start, int size);
  37 extern void (*__flush_invalidate_region)(void *start, int size);
  38
  39 extern void flush_cache_all(void);
  40 extern void flush_cache_mm(struct mm_struct *mm);
  41 extern void flush_cache_dup_mm(struct mm_struct *mm);
  42 extern void flush_cache_page(struct vm_area_struct *vma,
  43                                 unsigned long addr, unsigned long pfn);
  44 extern void flush_cache_range(struct vm_area_struct *vma,
  45                                  unsigned long start, unsigned long end);
  46 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  47 extern void flush_dcache_page(struct page *page);
  48 extern void flush_icache_range(unsigned long start, unsigned long end);
  49 extern void flush_icache_page(struct vm_area_struct *vma,
  50                                  struct page *page);
  51 extern void flush_cache_sigtramp(unsigned long address);
  52
  53 struct flusher_data {
  54         struct vm_area_struct *vma;
  55         unsigned long addr1, addr2;
  56 };
  57
  58 #define ARCH_HAS_FLUSH_ANON_PAGE
  59 extern void __flush_anon_page(struct page *page, unsigned long);
  60
  61 static inline void flush_anon_page(struct vm_area_struct *vma,
  62                                    struct page *page, unsigned long vmaddr)
  63 {
  64         if (boot_cpu_data.dcache.n_aliases && PageAnon(page))
  65                 __flush_anon_page(page, vmaddr);
  66 }
  67 static inline void flush_kernel_vmap_range(void *addr, int size)
  68 {
  69         __flush_wback_region(addr, size);
  70 }
  71 static inline void invalidate_kernel_vmap_range(void *addr, int size)
  72 {
  73         __flush_invalidate_region(addr, size);
  74 }
  75
  76 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
  77 static inline void flush_kernel_dcache_page(struct page *page)
  78 {
  79         flush_dcache_page(page);
  80 }
  81
  82 extern void copy_to_user_page(struct vm_area_struct *vma,
  83         struct page *page, unsigned long vaddr, void *dst, const void *src,
  84         unsigned long len);
  85
  86 extern void copy_from_user_page(struct vm_area_struct *vma,
  87         struct page *page, unsigned long vaddr, void *dst, const void *src,
  88         unsigned long len);
  89
  90 #define flush_cache_vmap(start, end)            local_flush_cache_all(NULL)
  91 #define flush_cache_vunmap(start, end)          local_flush_cache_all(NULL)
  92
  93 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  94 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  95
  96 void kmap_coherent_init(void);
  97 void *kmap_coherent(struct page *page, unsigned long addr);
  98 void kunmap_coherent(void *kvaddr);
  99
 100 #define PG_dcache_clean PG_arch_1
 101
 102 void cpu_cache_init(void);
 103
 104 #endif /* __KERNEL__ */
 105 #endif /* __ASM_SH_CACHEFLUSH_H */