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1965aae3 PA |
1 | #ifndef _ASM_X86_CACHEFLUSH_H |
2 | #define _ASM_X86_CACHEFLUSH_H | |
b2bba72c | 3 | |
b2bba72c | 4 | /* Caches aren't brain-dead on the intel. */ |
cc67ba63 | 5 | #include <asm-generic/cacheflush.h> |
f05e798a | 6 | #include <asm/special_insns.h> |
b2bba72c | 7 | |
7219bebd AV |
8 | /* |
9 | * The set_memory_* API can be used to change various attributes of a virtual | |
10 | * address range. The attributes include: | |
623dffb2 | 11 | * Cachability : UnCached, WriteCombining, WriteThrough, WriteBack |
7219bebd AV |
12 | * Executability : eXeutable, NoteXecutable |
13 | * Read/Write : ReadOnly, ReadWrite | |
14 | * Presence : NotPresent | |
15 | * | |
0d2eb44f | 16 | * Within a category, the attributes are mutually exclusive. |
7219bebd AV |
17 | * |
18 | * The implementation of this API will take care of various aspects that | |
19 | * are associated with changing such attributes, such as: | |
20 | * - Flushing TLBs | |
21 | * - Flushing CPU caches | |
22 | * - Making sure aliases of the memory behind the mapping don't violate | |
23 | * coherency rules as defined by the CPU in the system. | |
24 | * | |
25 | * What this API does not do: | |
26 | * - Provide exclusion between various callers - including callers that | |
27 | * operation on other mappings of the same physical page | |
28 | * - Restore default attributes when a page is freed | |
29 | * - Guarantee that mappings other than the requested one are | |
30 | * in any state, other than that these do not violate rules for | |
31 | * the CPU you have. Do not depend on any effects on other mappings, | |
32 | * CPUs other than the one you have may have more relaxed rules. | |
33 | * The caller is required to take care of these. | |
34 | */ | |
75cbade8 | 35 | |
1219333d | 36 | int _set_memory_uc(unsigned long addr, int numpages); |
ef354af4 | 37 | int _set_memory_wc(unsigned long addr, int numpages); |
623dffb2 | 38 | int _set_memory_wt(unsigned long addr, int numpages); |
1219333d | 39 | int _set_memory_wb(unsigned long addr, int numpages); |
75cbade8 | 40 | int set_memory_uc(unsigned long addr, int numpages); |
ef354af4 | 41 | int set_memory_wc(unsigned long addr, int numpages); |
623dffb2 | 42 | int set_memory_wt(unsigned long addr, int numpages); |
75cbade8 AV |
43 | int set_memory_wb(unsigned long addr, int numpages); |
44 | int set_memory_x(unsigned long addr, int numpages); | |
45 | int set_memory_nx(unsigned long addr, int numpages); | |
46 | int set_memory_ro(unsigned long addr, int numpages); | |
47 | int set_memory_rw(unsigned long addr, int numpages); | |
f62d0f00 | 48 | int set_memory_np(unsigned long addr, int numpages); |
c9caa02c | 49 | int set_memory_4k(unsigned long addr, int numpages); |
75cbade8 | 50 | |
d75586ad | 51 | int set_memory_array_uc(unsigned long *addr, int addrinarray); |
4f646254 | 52 | int set_memory_array_wc(unsigned long *addr, int addrinarray); |
623dffb2 | 53 | int set_memory_array_wt(unsigned long *addr, int addrinarray); |
d75586ad SL |
54 | int set_memory_array_wb(unsigned long *addr, int addrinarray); |
55 | ||
0f350755 | 56 | int set_pages_array_uc(struct page **pages, int addrinarray); |
4f646254 | 57 | int set_pages_array_wc(struct page **pages, int addrinarray); |
623dffb2 | 58 | int set_pages_array_wt(struct page **pages, int addrinarray); |
0f350755 | 59 | int set_pages_array_wb(struct page **pages, int addrinarray); |
60 | ||
7219bebd AV |
61 | /* |
62 | * For legacy compatibility with the old APIs, a few functions | |
63 | * are provided that work on a "struct page". | |
64 | * These functions operate ONLY on the 1:1 kernel mapping of the | |
65 | * memory that the struct page represents, and internally just | |
66 | * call the set_memory_* function. See the description of the | |
67 | * set_memory_* function for more details on conventions. | |
68 | * | |
69 | * These APIs should be considered *deprecated* and are likely going to | |
70 | * be removed in the future. | |
71 | * The reason for this is the implicit operation on the 1:1 mapping only, | |
72 | * making this not a generally useful API. | |
73 | * | |
74 | * Specifically, many users of the old APIs had a virtual address, | |
75 | * called virt_to_page() or vmalloc_to_page() on that address to | |
76 | * get a struct page* that the old API required. | |
77 | * To convert these cases, use set_memory_*() on the original | |
78 | * virtual address, do not use these functions. | |
79 | */ | |
80 | ||
81 | int set_pages_uc(struct page *page, int numpages); | |
82 | int set_pages_wb(struct page *page, int numpages); | |
83 | int set_pages_x(struct page *page, int numpages); | |
84 | int set_pages_nx(struct page *page, int numpages); | |
85 | int set_pages_ro(struct page *page, int numpages); | |
86 | int set_pages_rw(struct page *page, int numpages); | |
87 | ||
88 | ||
4c61afcd | 89 | void clflush_cache_range(void *addr, unsigned int size); |
b2bba72c | 90 | |
b2bba72c TG |
91 | #ifdef CONFIG_DEBUG_RODATA |
92 | void mark_rodata_ro(void); | |
7bfeab9a | 93 | extern const int rodata_test_data; |
502f6604 | 94 | extern int kernel_set_to_readonly; |
16239630 SR |
95 | void set_kernel_text_rw(void); |
96 | void set_kernel_text_ro(void); | |
97 | #else | |
98 | static inline void set_kernel_text_rw(void) { } | |
99 | static inline void set_kernel_text_ro(void) { } | |
b2bba72c | 100 | #endif |
7bfeab9a | 101 | |
edeed305 | 102 | #ifdef CONFIG_DEBUG_RODATA_TEST |
7bfeab9a | 103 | int rodata_test(void); |
edeed305 | 104 | #else |
7bfeab9a | 105 | static inline int rodata_test(void) |
edeed305 | 106 | { |
7bfeab9a | 107 | return 0; |
edeed305 AV |
108 | } |
109 | #endif | |
b2bba72c | 110 | |
1965aae3 | 111 | #endif /* _ASM_X86_CACHEFLUSH_H */ |