Thomas Gleixner | b2bba72 | 2007-10-15 23:28:20 +0200 | [diff] [blame] | 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) |
Joe Perches | 3f61b19 | 2008-03-23 01:01:48 -0700 | [diff] [blame] | 17 | #define flush_icache_page(vma, pg) do { } while (0) |
| 18 | #define flush_icache_user_range(vma, pg, adr, len) do { } while (0) |
Thomas Gleixner | b2bba72 | 2007-10-15 23:28:20 +0200 | [diff] [blame] | 19 | #define flush_cache_vmap(start, end) do { } while (0) |
| 20 | #define flush_cache_vunmap(start, end) do { } while (0) |
| 21 | |
Joe Perches | 3f61b19 | 2008-03-23 01:01:48 -0700 | [diff] [blame] | 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)) |
Thomas Gleixner | b2bba72 | 2007-10-15 23:28:20 +0200 | [diff] [blame] | 26 | |
Arjan van de Ven | 75cbade | 2008-01-30 13:34:06 +0100 | [diff] [blame] | 27 | |
Arjan van de Ven | 7219beb | 2008-04-17 17:41:31 +0200 | [diff] [blame] | 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 | */ |
Arjan van de Ven | 75cbade | 2008-01-30 13:34:06 +0100 | [diff] [blame] | 55 | |
venkatesh.pallipadi@intel.com | 1219333 | 2008-03-18 17:00:18 -0700 | [diff] [blame] | 56 | int _set_memory_uc(unsigned long addr, int numpages); |
venkatesh.pallipadi@intel.com | ef354af | 2008-03-18 17:00:23 -0700 | [diff] [blame] | 57 | int _set_memory_wc(unsigned long addr, int numpages); |
venkatesh.pallipadi@intel.com | 1219333 | 2008-03-18 17:00:18 -0700 | [diff] [blame] | 58 | int _set_memory_wb(unsigned long addr, int numpages); |
Arjan van de Ven | 75cbade | 2008-01-30 13:34:06 +0100 | [diff] [blame] | 59 | int set_memory_uc(unsigned long addr, int numpages); |
venkatesh.pallipadi@intel.com | ef354af | 2008-03-18 17:00:23 -0700 | [diff] [blame] | 60 | int set_memory_wc(unsigned long addr, int numpages); |
Arjan van de Ven | 75cbade | 2008-01-30 13:34:06 +0100 | [diff] [blame] | 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); |
Ingo Molnar | f62d0f0 | 2008-01-30 13:34:07 +0100 | [diff] [blame] | 66 | int set_memory_np(unsigned long addr, int numpages); |
Andi Kleen | c9caa02 | 2008-03-12 03:53:29 +0100 | [diff] [blame] | 67 | int set_memory_4k(unsigned long addr, int numpages); |
Arjan van de Ven | 75cbade | 2008-01-30 13:34:06 +0100 | [diff] [blame] | 68 | |
Arjan van de Ven | 7219beb | 2008-04-17 17:41:31 +0200 | [diff] [blame] | 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 | |
Ingo Molnar | 4c61afc | 2008-01-30 13:34:09 +0100 | [diff] [blame] | 97 | void clflush_cache_range(void *addr, unsigned int size); |
Thomas Gleixner | b2bba72 | 2007-10-15 23:28:20 +0200 | [diff] [blame] | 98 | |
Thomas Gleixner | 76ebd05 | 2008-02-09 23:24:09 +0100 | [diff] [blame] | 99 | void cpa_init(void); |
| 100 | |
Thomas Gleixner | b2bba72 | 2007-10-15 23:28:20 +0200 | [diff] [blame] | 101 | #ifdef CONFIG_DEBUG_RODATA |
| 102 | void mark_rodata_ro(void); |
Harvey Harrison | 7bfeab9 | 2008-02-12 12:12:01 -0800 | [diff] [blame] | 103 | extern const int rodata_test_data; |
Thomas Gleixner | b2bba72 | 2007-10-15 23:28:20 +0200 | [diff] [blame] | 104 | #endif |
Harvey Harrison | 7bfeab9 | 2008-02-12 12:12:01 -0800 | [diff] [blame] | 105 | |
Arjan van de Ven | edeed30 | 2008-01-30 13:34:08 +0100 | [diff] [blame] | 106 | #ifdef CONFIG_DEBUG_RODATA_TEST |
Harvey Harrison | 7bfeab9 | 2008-02-12 12:12:01 -0800 | [diff] [blame] | 107 | int rodata_test(void); |
Arjan van de Ven | edeed30 | 2008-01-30 13:34:08 +0100 | [diff] [blame] | 108 | #else |
Harvey Harrison | 7bfeab9 | 2008-02-12 12:12:01 -0800 | [diff] [blame] | 109 | static inline int rodata_test(void) |
Arjan van de Ven | edeed30 | 2008-01-30 13:34:08 +0100 | [diff] [blame] | 110 | { |
Harvey Harrison | 7bfeab9 | 2008-02-12 12:12:01 -0800 | [diff] [blame] | 111 | return 0; |
Arjan van de Ven | edeed30 | 2008-01-30 13:34:08 +0100 | [diff] [blame] | 112 | } |
| 113 | #endif |
Thomas Gleixner | b2bba72 | 2007-10-15 23:28:20 +0200 | [diff] [blame] | 114 | |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 115 | #endif |