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b2bba72c TG |
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) | |
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 | |
75cbade8 | 27 | |
7219bebd AV |
28 | /* |
29 | * The set_memory_* API can be used to change various attributes of a virtual | |
30 | * address range. The attributes include: | |
31 | * Cachability : UnCached, WriteCombining, WriteBack | |
32 | * Executability : eXeutable, NoteXecutable | |
33 | * Read/Write : ReadOnly, ReadWrite | |
34 | * Presence : NotPresent | |
35 | * | |
36 | * Within a catagory, the attributes are mutually exclusive. | |
37 | * | |
38 | * The implementation of this API will take care of various aspects that | |
39 | * are associated with changing such attributes, such as: | |
40 | * - Flushing TLBs | |
41 | * - Flushing CPU caches | |
42 | * - Making sure aliases of the memory behind the mapping don't violate | |
43 | * coherency rules as defined by the CPU in the system. | |
44 | * | |
45 | * What this API does not do: | |
46 | * - Provide exclusion between various callers - including callers that | |
47 | * operation on other mappings of the same physical page | |
48 | * - Restore default attributes when a page is freed | |
49 | * - Guarantee that mappings other than the requested one are | |
50 | * in any state, other than that these do not violate rules for | |
51 | * the CPU you have. Do not depend on any effects on other mappings, | |
52 | * CPUs other than the one you have may have more relaxed rules. | |
53 | * The caller is required to take care of these. | |
54 | */ | |
75cbade8 | 55 | |
1219333d | 56 | int _set_memory_uc(unsigned long addr, int numpages); |
ef354af4 | 57 | int _set_memory_wc(unsigned long addr, int numpages); |
1219333d | 58 | int _set_memory_wb(unsigned long addr, int numpages); |
75cbade8 | 59 | int set_memory_uc(unsigned long addr, int numpages); |
ef354af4 | 60 | int set_memory_wc(unsigned long addr, int numpages); |
75cbade8 AV |
61 | int set_memory_wb(unsigned long addr, int numpages); |
62 | int set_memory_x(unsigned long addr, int numpages); | |
63 | int set_memory_nx(unsigned long addr, int numpages); | |
64 | int set_memory_ro(unsigned long addr, int numpages); | |
65 | int set_memory_rw(unsigned long addr, int numpages); | |
f62d0f00 | 66 | int set_memory_np(unsigned long addr, int numpages); |
c9caa02c | 67 | int set_memory_4k(unsigned long addr, int numpages); |
75cbade8 | 68 | |
7219bebd AV |
69 | /* |
70 | * For legacy compatibility with the old APIs, a few functions | |
71 | * are provided that work on a "struct page". | |
72 | * These functions operate ONLY on the 1:1 kernel mapping of the | |
73 | * memory that the struct page represents, and internally just | |
74 | * call the set_memory_* function. See the description of the | |
75 | * set_memory_* function for more details on conventions. | |
76 | * | |
77 | * These APIs should be considered *deprecated* and are likely going to | |
78 | * be removed in the future. | |
79 | * The reason for this is the implicit operation on the 1:1 mapping only, | |
80 | * making this not a generally useful API. | |
81 | * | |
82 | * Specifically, many users of the old APIs had a virtual address, | |
83 | * called virt_to_page() or vmalloc_to_page() on that address to | |
84 | * get a struct page* that the old API required. | |
85 | * To convert these cases, use set_memory_*() on the original | |
86 | * virtual address, do not use these functions. | |
87 | */ | |
88 | ||
89 | int set_pages_uc(struct page *page, int numpages); | |
90 | int set_pages_wb(struct page *page, int numpages); | |
91 | int set_pages_x(struct page *page, int numpages); | |
92 | int set_pages_nx(struct page *page, int numpages); | |
93 | int set_pages_ro(struct page *page, int numpages); | |
94 | int set_pages_rw(struct page *page, int numpages); | |
95 | ||
96 | ||
4c61afcd | 97 | void clflush_cache_range(void *addr, unsigned int size); |
b2bba72c | 98 | |
76ebd054 TG |
99 | void cpa_init(void); |
100 | ||
b2bba72c TG |
101 | #ifdef CONFIG_DEBUG_RODATA |
102 | void mark_rodata_ro(void); | |
7bfeab9a | 103 | extern const int rodata_test_data; |
b2bba72c | 104 | #endif |
7bfeab9a | 105 | |
edeed305 | 106 | #ifdef CONFIG_DEBUG_RODATA_TEST |
7bfeab9a | 107 | int rodata_test(void); |
edeed305 | 108 | #else |
7bfeab9a | 109 | static inline int rodata_test(void) |
edeed305 | 110 | { |
7bfeab9a | 111 | return 0; |
edeed305 AV |
112 | } |
113 | #endif | |
b2bba72c | 114 | |
96a388de | 115 | #endif |