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Linux/arch/sh/include/asm/cacheflush.h

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  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_page(pg) flushes(wback&invalidates) a page for dcache
 17  *  - flush_icache_range(start, end) flushes(invalidates) a range for icache
 18  *  - flush_icache_page(vma, pg) flushes(invalidates) a page 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_page)(void *args);
 27 extern void (*local_flush_icache_range)(void *args);
 28 extern void (*local_flush_icache_page)(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 extern void flush_dcache_page(struct page *page);
 46 extern void flush_icache_range(unsigned long start, unsigned long end);
 47 #define flush_icache_user_range flush_icache_range
 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 static inline void *sh_cacheop_vaddr(void *vaddr)
104 {
105         if (__in_29bit_mode())
106                 vaddr = (void *)CAC_ADDR((unsigned long)vaddr);
107         return vaddr;
108 }
109 
110 #endif /* __ASM_SH_CACHEFLUSH_H */
111 

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