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1 | #ifndef ASM_X86__CACHEFLUSH_H |
2 | #define ASM_X86__CACHEFLUSH_H | |
b2bba72c TG |
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) | |
3f61b19a JP |
17 | #define flush_icache_page(vma, pg) do { } while (0) |
18 | #define flush_icache_user_range(vma, pg, adr, len) do { } while (0) | |
b2bba72c TG |
19 | #define flush_cache_vmap(start, end) do { } while (0) |
20 | #define flush_cache_vunmap(start, end) do { } while (0) | |
21 | ||
3f61b19a JP |
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)) | |
b2bba72c | 26 | |
9542ada8 SS |
27 | #define PG_non_WB PG_arch_1 |
28 | PAGEFLAG(NonWB, non_WB) | |
75cbade8 | 29 | |
7219bebd AV |
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 | */ | |
75cbade8 | 57 | |
1219333d | 58 | int _set_memory_uc(unsigned long addr, int numpages); |
ef354af4 | 59 | int _set_memory_wc(unsigned long addr, int numpages); |
1219333d | 60 | int _set_memory_wb(unsigned long addr, int numpages); |
75cbade8 | 61 | int set_memory_uc(unsigned long addr, int numpages); |
ef354af4 | 62 | int set_memory_wc(unsigned long addr, int numpages); |
75cbade8 AV |
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); | |
f62d0f00 | 68 | int set_memory_np(unsigned long addr, int numpages); |
c9caa02c | 69 | int set_memory_4k(unsigned long addr, int numpages); |
75cbade8 | 70 | |
d75586ad SL |
71 | int set_memory_array_uc(unsigned long *addr, int addrinarray); |
72 | int set_memory_array_wb(unsigned long *addr, int addrinarray); | |
73 | ||
7219bebd AV |
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 | ||
4c61afcd | 102 | void clflush_cache_range(void *addr, unsigned int size); |
b2bba72c | 103 | |
b2bba72c TG |
104 | #ifdef CONFIG_DEBUG_RODATA |
105 | void mark_rodata_ro(void); | |
7bfeab9a | 106 | extern const int rodata_test_data; |
b2bba72c | 107 | #endif |
7bfeab9a | 108 | |
edeed305 | 109 | #ifdef CONFIG_DEBUG_RODATA_TEST |
7bfeab9a | 110 | int rodata_test(void); |
edeed305 | 111 | #else |
7bfeab9a | 112 | static inline int rodata_test(void) |
edeed305 | 113 | { |
7bfeab9a | 114 | return 0; |
edeed305 AV |
115 | } |
116 | #endif | |
b2bba72c | 117 | |
77ef50a5 | 118 | #endif /* ASM_X86__CACHEFLUSH_H */ |