#ifndef _ASM_X86_CACHEFLUSH_H #define _ASM_X86_CACHEFLUSH_H /* Keep includes the same across arches. */ #include <linux/mm.h> /* Caches aren't brain-dead on the intel. */ #define flush_cache_all() do { } while (0) #define flush_cache_mm(mm) do { } while (0) #define flush_cache_dup_mm(mm) do { } while (0) #define flush_cache_range(vma, start, end) do { } while (0) #define flush_cache_page(vma, vmaddr, pfn) do { } while (0) #define flush_dcache_page(page) do { } while (0) #define flush_dcache_mmap_lock(mapping) do { } while (0) #define flush_dcache_mmap_unlock(mapping) do { } while (0) #define flush_icache_range(start, end) do { } while (0) #define flush_icache_page(vma, pg) do { } while (0) #define flush_icache_user_range(vma, pg, adr, len) do { } while (0) #define flush_cache_vmap(start, end) do { } while (0) #define flush_cache_vunmap(start, end) do { } while (0) #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ memcpy((dst), (src), (len)) #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ memcpy((dst), (src), (len)) /* * The set_memory_* API can be used to change various attributes of a virtual * address range. The attributes include: * Cachability : UnCached, WriteCombining, WriteBack * Executability : eXeutable, NoteXecutable * Read/Write : ReadOnly, ReadWrite * Presence : NotPresent * * Within a catagory, the attributes are mutually exclusive. * * The implementation of this API will take care of various aspects that * are associated with changing such attributes, such as: * - Flushing TLBs * - Flushing CPU caches * - Making sure aliases of the memory behind the mapping don't violate * coherency rules as defined by the CPU in the system. * * What this API does not do: * - Provide exclusion between various callers - including callers that * operation on other mappings of the same physical page * - Restore default attributes when a page is freed * - Guarantee that mappings other than the requested one are * in any state, other than that these do not violate rules for * the CPU you have. Do not depend on any effects on other mappings, * CPUs other than the one you have may have more relaxed rules. * The caller is required to take care of these. */ int _set_memory_uc(unsigned long addr, int numpages); int _set_memory_wc(unsigned long addr, int numpages); int _set_memory_wb(unsigned long addr, int numpages); int set_memory_uc(unsigned long addr, int numpages); int set_memory_wc(unsigned long addr, int numpages); int set_memory_wb(unsigned long addr, int numpages); int set_memory_x(unsigned long addr, int numpages); int set_memory_nx(unsigned long addr, int numpages); int set_memory_ro(unsigned long addr, int numpages); int set_memory_rw(unsigned long addr, int numpages); int set_memory_np(unsigned long addr, int numpages); int set_memory_4k(unsigned long addr, int numpages); /* * For legacy compatibility with the old APIs, a few functions * are provided that work on a "struct page". * These functions operate ONLY on the 1:1 kernel mapping of the * memory that the struct page represents, and internally just * call the set_memory_* function. See the description of the * set_memory_* function for more details on conventions. * * These APIs should be considered *deprecated* and are likely going to * be removed in the future. * The reason for this is the implicit operation on the 1:1 mapping only, * making this not a generally useful API. * * Specifically, many users of the old APIs had a virtual address, * called virt_to_page() or vmalloc_to_page() on that address to * get a struct page* that the old API required. * To convert these cases, use set_memory_*() on the original * virtual address, do not use these functions. */ int set_pages_uc(struct page *page, int numpages); int set_pages_wb(struct page *page, int numpages); int set_pages_x(struct page *page, int numpages); int set_pages_nx(struct page *page, int numpages); int set_pages_ro(struct page *page, int numpages); int set_pages_rw(struct page *page, int numpages); void clflush_cache_range(void *addr, unsigned int size); void cpa_init(void); #ifdef CONFIG_DEBUG_RODATA void mark_rodata_ro(void); extern const int rodata_test_data; #endif #ifdef CONFIG_DEBUG_RODATA_TEST int rodata_test(void); #else static inline int rodata_test(void) { return 0; } #endif #endif