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 #include <linux/mm.h>
   6
   7 /*
   8  * Cache flushing:
   9  *
  10  *  - flush_cache_all() flushes entire cache
  11  *  - flush_cache_mm(mm) flushes the specified mm context's cache lines
  12  *  - flush_cache_dup mm(mm) handles cache flushing when forking
  13  *  - flush_cache_page(mm, vmaddr, pfn) flushes a single page
  14  *  - flush_cache_range(vma, start, end) flushes a range of pages
  15  *
  16  *  - flush_dcache_folio(folio) flushes(wback&invalidates) a folio for dcache
  17  *  - flush_icache_range(start, end) flushes(invalidates) a range for icache
  18  *  - flush_icache_pages(vma, pg, nr) flushes(invalidates) pages for icache
  19  *  - flush_cache_sigtramp(vaddr) flushes the signal trampoline
  20  */
  21 extern void (*local_flush_cache_all)(void *args);
  22 extern void (*local_flush_cache_mm)(void *args);
  23 extern void (*local_flush_cache_dup_mm)(void *args);
  24 extern void (*local_flush_cache_page)(void *args);
  25 extern void (*local_flush_cache_range)(void *args);
  26 extern void (*local_flush_dcache_folio)(void *args);
  27 extern void (*local_flush_icache_range)(void *args);
  28 extern void (*local_flush_icache_folio)(void *args);
  29 extern void (*local_flush_cache_sigtramp)(void *args);
  30
  31 static inline void cache_noop(void *args) { }
  32
  33 extern void (*__flush_wback_region)(void *start, int size);
  34 extern void (*__flush_purge_region)(void *start, int size);
  35 extern void (*__flush_invalidate_region)(void *start, int size);
  36
  37 extern void flush_cache_all(void);
  38 extern void flush_cache_mm(struct mm_struct *mm);
  39 extern void flush_cache_dup_mm(struct mm_struct *mm);
  40 extern void flush_cache_page(struct vm_area_struct *vma,
  41                                 unsigned long addr, unsigned long pfn);
  42 extern void flush_cache_range(struct vm_area_struct *vma,
  43                                  unsigned long start, unsigned long end);
  44 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  45 void flush_dcache_folio(struct folio *folio);
  46 #define flush_dcache_folio flush_dcache_folio
  47 static inline void flush_dcache_page(struct page *page)
  48 {
  49         flush_dcache_folio(page_folio(page));
  50 }
  51
  52 extern void flush_icache_range(unsigned long start, unsigned long end);
  53 #define flush_icache_user_range flush_icache_range
  54 void flush_icache_pages(struct vm_area_struct *vma, struct page *page,
  55                 unsigned int nr);
  56 #define flush_icache_pages flush_icache_pages
  57 extern void flush_cache_sigtramp(unsigned long address);
  58
  59 struct flusher_data {
  60         struct vm_area_struct *vma;
  61         unsigned long addr1, addr2;
  62 };
  63
  64 #define ARCH_HAS_FLUSH_ANON_PAGE
  65 extern void __flush_anon_page(struct page *page, unsigned long);
  66
  67 static inline void flush_anon_page(struct vm_area_struct *vma,
  68                                    struct page *page, unsigned long vmaddr)
  69 {
  70         if (boot_cpu_data.dcache.n_aliases && PageAnon(page))
  71                 __flush_anon_page(page, vmaddr);
  72 }
  73
  74 #define ARCH_IMPLEMENTS_FLUSH_KERNEL_VMAP_RANGE 1
  75 static inline void flush_kernel_vmap_range(void *addr, int size)
  76 {
  77         __flush_wback_region(addr, size);
  78 }
  79 static inline void invalidate_kernel_vmap_range(void *addr, int size)
  80 {
  81         __flush_invalidate_region(addr, size);
  82 }
  83
  84 extern void copy_to_user_page(struct vm_area_struct *vma,
  85         struct page *page, unsigned long vaddr, void *dst, const void *src,
  86         unsigned long len);
  87
  88 extern void copy_from_user_page(struct vm_area_struct *vma,
  89         struct page *page, unsigned long vaddr, void *dst, const void *src,
  90         unsigned long len);
  91
  92 #define flush_cache_vmap(start, end)            local_flush_cache_all(NULL)
  93 #define flush_cache_vmap_early(start, end)      do { } while (0)
  94 #define flush_cache_vunmap(start, end)          local_flush_cache_all(NULL)
  95
  96 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  97 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  98
  99 void kmap_coherent_init(void);
 100 void *kmap_coherent(struct page *page, unsigned long addr);
 101 void kunmap_coherent(void *kvaddr);
 102
 103 #define PG_dcache_clean PG_arch_1
 104
 105 void cpu_cache_init(void);
 106
 107 void __weak l2_cache_init(void);
 108
 109 void __weak j2_cache_init(void);
 110 void __weak sh2_cache_init(void);
 111 void __weak sh2a_cache_init(void);
 112 void __weak sh3_cache_init(void);
 113 void __weak shx3_cache_init(void);
 114 void __weak sh4_cache_init(void);
 115 void __weak sh7705_cache_init(void);
 116
 117 void __weak sh4__flush_region_init(void);
 118
 119 static inline void *sh_cacheop_vaddr(void *vaddr)
 120 {
 121         if (__in_29bit_mode())
 122                 vaddr = (void *)CAC_ADDR((unsigned long)vaddr);
 123         return vaddr;
 124 }
 125
 126 #endif /* __ASM_SH_CACHEFLUSH_H */