1 #ifndef _ASM_X86_CACHEFLUSH_H 2 #define _ASM_X86_CACHEFLUSH_H 3 4 /* Keep includes the same across arches. */ 5 #include <linux/mm.h> 6 7 /* Caches aren't brain-dead on the intel. */ 8 #define flush_cache_all() do { } while (0) 9 #define flush_cache_mm(mm) do { } while (0) 10 #define flush_cache_dup_mm(mm) do { } while (0) 11 #define flush_cache_range(vma, start, end) do { } while (0) 12 #define flush_cache_page(vma, vmaddr, pfn) do { } while (0) 13 #define flush_dcache_page(page) do { } while (0) 14 #define flush_dcache_mmap_lock(mapping) do { } while (0) 15 #define flush_dcache_mmap_unlock(mapping) do { } while (0) 16 #define flush_icache_range(start, end) do { } while (0) 17 #define flush_icache_page(vma, pg) do { } while (0) 18 #define flush_icache_user_range(vma, pg, adr, len) do { } while (0) 19 #define flush_cache_vmap(start, end) do { } while (0) 20 #define flush_cache_vunmap(start, end) do { } while (0) 21 22 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ 23 memcpy((dst), (src), (len)) 24 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ 25 memcpy((dst), (src), (len)) 26 27 #define PG_non_WB PG_arch_1 28 PAGEFLAG(NonWB, non_WB) 29 30 /* 31 * The set_memory_* API can be used to change various attributes of a virtual 32 * address range. The attributes include: 33 * Cachability : UnCached, WriteCombining, WriteBack 34 * Executability : eXeutable, NoteXecutable 35 * Read/Write : ReadOnly, ReadWrite 36 * Presence : NotPresent 37 * 38 * Within a catagory, the attributes are mutually exclusive. 39 * 40 * The implementation of this API will take care of various aspects that 41 * are associated with changing such attributes, such as: 42 * - Flushing TLBs 43 * - Flushing CPU caches 44 * - Making sure aliases of the memory behind the mapping don't violate 45 * coherency rules as defined by the CPU in the system. 46 * 47 * What this API does not do: 48 * - Provide exclusion between various callers - including callers that 49 * operation on other mappings of the same physical page 50 * - Restore default attributes when a page is freed 51 * - Guarantee that mappings other than the requested one are 52 * in any state, other than that these do not violate rules for 53 * the CPU you have. Do not depend on any effects on other mappings, 54 * CPUs other than the one you have may have more relaxed rules. 55 * The caller is required to take care of these. 56 */ 57 58 int _set_memory_uc(unsigned long addr, int numpages); 59 int _set_memory_wc(unsigned long addr, int numpages); 60 int _set_memory_wb(unsigned long addr, int numpages); 61 int set_memory_uc(unsigned long addr, int numpages); 62 int set_memory_wc(unsigned long addr, int numpages); 63 int set_memory_wb(unsigned long addr, int numpages); 64 int set_memory_x(unsigned long addr, int numpages); 65 int set_memory_nx(unsigned long addr, int numpages); 66 int set_memory_ro(unsigned long addr, int numpages); 67 int set_memory_rw(unsigned long addr, int numpages); 68 int set_memory_np(unsigned long addr, int numpages); 69 int set_memory_4k(unsigned long addr, int numpages); 70 71 int set_memory_array_uc(unsigned long *addr, int addrinarray); 72 int set_memory_array_wb(unsigned long *addr, int addrinarray); 73 74 /* 75 * For legacy compatibility with the old APIs, a few functions 76 * are provided that work on a "struct page". 77 * These functions operate ONLY on the 1:1 kernel mapping of the 78 * memory that the struct page represents, and internally just 79 * call the set_memory_* function. See the description of the 80 * set_memory_* function for more details on conventions. 81 * 82 * These APIs should be considered *deprecated* and are likely going to 83 * be removed in the future. 84 * The reason for this is the implicit operation on the 1:1 mapping only, 85 * making this not a generally useful API. 86 * 87 * Specifically, many users of the old APIs had a virtual address, 88 * called virt_to_page() or vmalloc_to_page() on that address to 89 * get a struct page* that the old API required. 90 * To convert these cases, use set_memory_*() on the original 91 * virtual address, do not use these functions. 92 */ 93 94 int set_pages_uc(struct page *page, int numpages); 95 int set_pages_wb(struct page *page, int numpages); 96 int set_pages_x(struct page *page, int numpages); 97 int set_pages_nx(struct page *page, int numpages); 98 int set_pages_ro(struct page *page, int numpages); 99 int set_pages_rw(struct page *page, int numpages); 100 101 102 void clflush_cache_range(void *addr, unsigned int size); 103 104 #ifdef CONFIG_DEBUG_RODATA 105 void mark_rodata_ro(void); 106 extern const int rodata_test_data; 107 #endif 108 109 #ifdef CONFIG_DEBUG_RODATA_TEST 110 int rodata_test(void); 111 #else 112 static inline int rodata_test(void) 113 { 114 return 0; 115 } 116 #endif 117 118 #endif /* _ASM_X86_CACHEFLUSH_H */ 119