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 */ 106