WebSVN – Kolibri OS – Blame – /drivers/include/asm/cacheflush.h

Rev	Author	Line No.	Line
5270	serge	1	#ifndef _ASM_X86_CACHEFLUSH_H
		2	#define _ASM_X86_CACHEFLUSH_H
		3
		4	/* Caches aren't brain-dead on the intel. */
		5	#include
		6	#include
		7
		8	/*
		9	* The set_memory_* API can be used to change various attributes of a virtual
		10	* address range. The attributes include:
6082	serge	11	* Cachability : UnCached, WriteCombining, WriteThrough, WriteBack
5270	serge	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);
6082	serge	38	int _set_memory_wt(unsigned long addr, int numpages);
5270	serge	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);
6082	serge	42	int set_memory_wt(unsigned long addr, int numpages);
5270	serge	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);
6082	serge	53	int set_memory_array_wt(unsigned long *addr, int addrinarray);
5270	serge	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);
6082	serge	58	int set_pages_array_wt(struct page **pages, int addrinarray);
5270	serge	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	static int set_pages_uc(struct page *page, int numpages)
		82	{
		83	return 0;
		84	};
		85
		86	static int set_pages_wb(struct page *page, int numpages)
		87	{
		88	return 0;
		89	};
		90
		91	static int set_pages_x(struct page *page, int numpages)
		92	{
		93	return 0;
		94	};
		95
		96	static int set_pages_nx(struct page *page, int numpages)
		97	{
		98	return 0;
		99	};
		100
		101	static int set_pages_ro(struct page *page, int numpages)
		102	{
		103	return 0;
		104	};
		105
		106	static int set_pages_rw(struct page *page, int numpages)
		107	{
		108	return 0;
		109	};
		110
		111
		112	void clflush_cache_range(void *addr, unsigned int size);
		113
6082	serge	114	#define mmio_flush_range(addr, size) clflush_cache_range(addr, size)
		115
5270	serge	116	#ifdef CONFIG_DEBUG_RODATA
		117	void mark_rodata_ro(void);
		118	extern const int rodata_test_data;
		119	extern int kernel_set_to_readonly;
		120	void set_kernel_text_rw(void);
		121	void set_kernel_text_ro(void);
		122	#else
		123	static inline void set_kernel_text_rw(void) { }
		124	static inline void set_kernel_text_ro(void) { }
		125	#endif
		126
		127	#ifdef CONFIG_DEBUG_RODATA_TEST
		128	int rodata_test(void);
		129	#else
		130	static inline int rodata_test(void)
		131	{
		132	return 0;
		133	}
		134	#endif
		135
		136	#endif /* _ASM_X86_CACHEFLUSH_H */

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(root)/drivers/include/asm/cacheflush.h – Rev 6082