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 flush_kernel_dcache_page_asm(void *); 30 void flush_kernel_icache_page(void *); 31 32 /* Cache flush operations */ 33 34 void flush_cache_all_local(void); 35 void flush_cache_all(void); 36 void flush_cache_mm(struct mm_struct *mm); 37 38 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE 39 void flush_kernel_dcache_page_addr(void *addr); 40 static inline void flush_kernel_dcache_page(struct page *page) 41 { 42 flush_kernel_dcache_page_addr(page_address(page)); 43 } 44 45 #define flush_kernel_dcache_range(start,size) \ 46 flush_kernel_dcache_range_asm((start), (start)+(size)); 47 48 void flush_kernel_vmap_range(void *vaddr, int size); 49 void invalidate_kernel_vmap_range(void *vaddr, int size); 50 51 #define flush_cache_vmap(start, end) flush_cache_all() 52 #define flush_cache_vunmap(start, end) flush_cache_all() 53 54 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 55 extern void flush_dcache_page(struct page *page); 56 57 #define flush_dcache_mmap_lock(mapping) \ 58 spin_lock_irq(&(mapping)->tree_lock) 59 #define flush_dcache_mmap_unlock(mapping) \ 60 spin_unlock_irq(&(mapping)->tree_lock) 61 62 #define flush_icache_page(vma,page) do { \ 63 flush_kernel_dcache_page(page); \ 64 flush_kernel_icache_page(page_address(page)); \ 65 } while (0) 66 67 #define flush_icache_range(s,e) do { \ 68 flush_kernel_dcache_range_asm(s,e); \ 69 flush_kernel_icache_range_asm(s,e); \ 70 } while (0) 71 72 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ 73 do { \ 74 flush_cache_page(vma, vaddr, page_to_pfn(page)); \ 75 memcpy(dst, src, len); \ 76 flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \ 77 } while (0) 78 79 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ 80 do { \ 81 flush_cache_page(vma, vaddr, page_to_pfn(page)); \ 82 memcpy(dst, src, len); \ 83 } while (0) 84 85 void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn); 86 void flush_cache_range(struct vm_area_struct *vma, 87 unsigned long start, unsigned long end); 88 89 /* defined in pacache.S exported in cache.c used by flush_anon_page */ 90 void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr); 91 92 #define ARCH_HAS_FLUSH_ANON_PAGE 93 static inline void 94 flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr) 95 { 96 if (PageAnon(page)) { 97 flush_tlb_page(vma, vmaddr); 98 preempt_disable(); 99 flush_dcache_page_asm(page_to_phys(page), vmaddr); 100 preempt_enable(); 101 } 102 } 103 104 #include <asm/kmap_types.h> 105 106 #define ARCH_HAS_KMAP 107 108 static inline void *kmap(struct page *page) 109 { 110 might_sleep(); 111 return page_address(page); 112 } 113 114 static inline void kunmap(struct page *page) 115 { 116 flush_kernel_dcache_page_addr(page_address(page)); 117 } 118 119 static inline void *kmap_atomic(struct page *page) 120 { 121 preempt_disable(); 122 pagefault_disable(); 123 return page_address(page); 124 } 125 126 static inline void __kunmap_atomic(void *addr) 127 { 128 flush_kernel_dcache_page_addr(addr); 129 pagefault_enable(); 130 preempt_enable(); 131 } 132 133 #define kmap_atomic_prot(page, prot) kmap_atomic(page) 134 #define kmap_atomic_pfn(pfn) kmap_atomic(pfn_to_page(pfn)) 135 136 #endif /* _PARISC_CACHEFLUSH_H */ 137 138