1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _PARISC_CACHEFLUSH_H 3 #define _PARISC_CACHEFLUSH_H 4 5 #include <linux/mm.h> 6 #include <linux/uaccess.h> 7 #include <asm/tlbflush.h> 8 9 /* The usual comment is "Caches aren't brain-dead on the <architecture>". 10 * Unfortunately, that doesn't apply to PA-RISC. */ 11 12 /* Internal implementation */ 13 void flush_data_cache_local(void *); /* flushes local data-cache only */ 14 void flush_instruction_cache_local(void *); /* flushes local code-cache only */ 15 #ifdef CONFIG_SMP 16 void flush_data_cache(void); /* flushes data-cache only (all processors) */ 17 void flush_instruction_cache(void); /* flushes i-cache only (all processors) */ 18 #else 19 #define flush_data_cache() flush_data_cache_local(NULL) 20 #define flush_instruction_cache() flush_instruction_cache_local(NULL) 21 #endif 22 23 #define flush_cache_dup_mm(mm) flush_cache_mm(mm) 24 25 void flush_user_icache_range_asm(unsigned long, unsigned long); 26 void flush_kernel_icache_range_asm(unsigned long, unsigned long); 27 void flush_user_dcache_range_asm(unsigned long, unsigned long); 28 void flush_kernel_dcache_range_asm(unsigned long, unsigned long); 29 void purge_kernel_dcache_range_asm(unsigned long, unsigned long); 30 void flush_kernel_dcache_page_asm(void *); 31 void flush_kernel_icache_page(void *); 32 33 /* Cache flush operations */ 34 35 void flush_cache_all_local(void); 36 void flush_cache_all(void); 37 void flush_cache_mm(struct mm_struct *mm); 38 39 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE 40 void flush_kernel_dcache_page_addr(void *addr); 41 static inline void flush_kernel_dcache_page(struct page *page) 42 { 43 flush_kernel_dcache_page_addr(page_address(page)); 44 } 45 46 #define flush_kernel_dcache_range(start,size) \ 47 flush_kernel_dcache_range_asm((start), (start)+(size)); 48 49 void flush_kernel_vmap_range(void *vaddr, int size); 50 void invalidate_kernel_vmap_range(void *vaddr, int size); 51 52 #define flush_cache_vmap(start, end) flush_cache_all() 53 #define flush_cache_vunmap(start, end) flush_cache_all() 54 55 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 56 extern void flush_dcache_page(struct page *page); 57 58 #define flush_dcache_mmap_lock(mapping) \ 59 spin_lock_irq(&(mapping)->tree_lock) 60 #define flush_dcache_mmap_unlock(mapping) \ 61 spin_unlock_irq(&(mapping)->tree_lock) 62 63 #define flush_icache_page(vma,page) do { \ 64 flush_kernel_dcache_page(page); \ 65 flush_kernel_icache_page(page_address(page)); \ 66 } while (0) 67 68 #define flush_icache_range(s,e) do { \ 69 flush_kernel_dcache_range_asm(s,e); \ 70 flush_kernel_icache_range_asm(s,e); \ 71 } while (0) 72 73 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ 74 do { \ 75 flush_cache_page(vma, vaddr, page_to_pfn(page)); \ 76 memcpy(dst, src, len); \ 77 flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \ 78 } while (0) 79 80 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ 81 do { \ 82 flush_cache_page(vma, vaddr, page_to_pfn(page)); \ 83 memcpy(dst, src, len); \ 84 } while (0) 85 86 void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn); 87 void flush_cache_range(struct vm_area_struct *vma, 88 unsigned long start, unsigned long end); 89 90 /* defined in pacache.S exported in cache.c used by flush_anon_page */ 91 void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr); 92 93 #define ARCH_HAS_FLUSH_ANON_PAGE 94 static inline void 95 flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr) 96 { 97 if (PageAnon(page)) { 98 flush_tlb_page(vma, vmaddr); 99 preempt_disable(); 100 flush_dcache_page_asm(page_to_phys(page), vmaddr); 101 preempt_enable(); 102 } 103 } 104 105 #include <asm/kmap_types.h> 106 107 #define ARCH_HAS_KMAP 108 109 static inline void *kmap(struct page *page) 110 { 111 might_sleep(); 112 return page_address(page); 113 } 114 115 static inline void kunmap(struct page *page) 116 { 117 flush_kernel_dcache_page_addr(page_address(page)); 118 } 119 120 static inline void *kmap_atomic(struct page *page) 121 { 122 preempt_disable(); 123 pagefault_disable(); 124 return page_address(page); 125 } 126 127 static inline void __kunmap_atomic(void *addr) 128 { 129 flush_kernel_dcache_page_addr(addr); 130 pagefault_enable(); 131 preempt_enable(); 132 } 133 134 #define kmap_atomic_prot(page, prot) kmap_atomic(page) 135 #define kmap_atomic_pfn(pfn) kmap_atomic(pfn_to_page(pfn)) 136 137 #endif /* _PARISC_CACHEFLUSH_H */ 138 139