diff options
Diffstat (limited to 'arch/x86/include/asm/cacheflush.h')
-rw-r--r-- | arch/x86/include/asm/cacheflush.h | 86 |
1 files changed, 1 insertions, 85 deletions
diff --git a/arch/x86/include/asm/cacheflush.h b/arch/x86/include/asm/cacheflush.h index e7e1942edff7..3d7db6f35aeb 100644 --- a/arch/x86/include/asm/cacheflush.h +++ b/arch/x86/include/asm/cacheflush.h | |||
@@ -4,94 +4,10 @@ | |||
4 | /* Caches aren't brain-dead on the intel. */ | 4 | /* Caches aren't brain-dead on the intel. */ |
5 | #include <asm-generic/cacheflush.h> | 5 | #include <asm-generic/cacheflush.h> |
6 | #include <asm/special_insns.h> | 6 | #include <asm/special_insns.h> |
7 | 7 | #include <asm/set_memory.h> | |
8 | /* | ||
9 | * The set_memory_* API can be used to change various attributes of a virtual | ||
10 | * address range. The attributes include: | ||
11 | * Cachability : UnCached, WriteCombining, WriteThrough, WriteBack | ||
12 | * Executability : eXeutable, NoteXecutable | ||
13 | * Read/Write : ReadOnly, ReadWrite | ||
14 | * Presence : NotPresent | ||
15 | * | ||
16 | * Within a category, the attributes are mutually exclusive. | ||
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 | */ | ||
35 | |||
36 | int _set_memory_uc(unsigned long addr, int numpages); | ||
37 | int _set_memory_wc(unsigned long addr, int numpages); | ||
38 | int _set_memory_wt(unsigned long addr, int numpages); | ||
39 | int _set_memory_wb(unsigned long addr, int numpages); | ||
40 | int set_memory_uc(unsigned long addr, int numpages); | ||
41 | int set_memory_wc(unsigned long addr, int numpages); | ||
42 | int set_memory_wt(unsigned long addr, int numpages); | ||
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); | ||
48 | int set_memory_np(unsigned long addr, int numpages); | ||
49 | int set_memory_4k(unsigned long addr, int numpages); | ||
50 | |||
51 | int set_memory_array_uc(unsigned long *addr, int addrinarray); | ||
52 | int set_memory_array_wc(unsigned long *addr, int addrinarray); | ||
53 | int set_memory_array_wt(unsigned long *addr, int addrinarray); | ||
54 | int set_memory_array_wb(unsigned long *addr, int addrinarray); | ||
55 | |||
56 | int set_pages_array_uc(struct page **pages, int addrinarray); | ||
57 | int set_pages_array_wc(struct page **pages, int addrinarray); | ||
58 | int set_pages_array_wt(struct page **pages, int addrinarray); | ||
59 | int set_pages_array_wb(struct page **pages, int addrinarray); | ||
60 | |||
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 | 8 | ||
89 | void clflush_cache_range(void *addr, unsigned int size); | 9 | void clflush_cache_range(void *addr, unsigned int size); |
90 | 10 | ||
91 | #define mmio_flush_range(addr, size) clflush_cache_range(addr, size) | 11 | #define mmio_flush_range(addr, size) clflush_cache_range(addr, size) |
92 | 12 | ||
93 | extern int kernel_set_to_readonly; | ||
94 | void set_kernel_text_rw(void); | ||
95 | void set_kernel_text_ro(void); | ||
96 | |||
97 | #endif /* _ASM_X86_CACHEFLUSH_H */ | 13 | #endif /* _ASM_X86_CACHEFLUSH_H */ |