0,0 → 1,131 |
#ifndef _ASM_X86_CACHEFLUSH_H |
#define _ASM_X86_CACHEFLUSH_H |
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/* Caches aren't brain-dead on the intel. */ |
#include <asm-generic/cacheflush.h> |
#include <asm/special_insns.h> |
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/* |
* 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 category, 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. |
*/ |
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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); |
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int set_memory_array_uc(unsigned long *addr, int addrinarray); |
int set_memory_array_wc(unsigned long *addr, int addrinarray); |
int set_memory_array_wb(unsigned long *addr, int addrinarray); |
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int set_pages_array_uc(struct page **pages, int addrinarray); |
int set_pages_array_wc(struct page **pages, int addrinarray); |
int set_pages_array_wb(struct page **pages, int addrinarray); |
|
/* |
* 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. |
*/ |
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static int set_pages_uc(struct page *page, int numpages) |
{ |
return 0; |
}; |
|
static int set_pages_wb(struct page *page, int numpages) |
{ |
return 0; |
}; |
|
static int set_pages_x(struct page *page, int numpages) |
{ |
return 0; |
}; |
|
static int set_pages_nx(struct page *page, int numpages) |
{ |
return 0; |
}; |
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static int set_pages_ro(struct page *page, int numpages) |
{ |
return 0; |
}; |
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static int set_pages_rw(struct page *page, int numpages) |
{ |
return 0; |
}; |
|
|
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void clflush_cache_range(void *addr, unsigned int size); |
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#ifdef CONFIG_DEBUG_RODATA |
void mark_rodata_ro(void); |
extern const int rodata_test_data; |
extern int kernel_set_to_readonly; |
void set_kernel_text_rw(void); |
void set_kernel_text_ro(void); |
#else |
static inline void set_kernel_text_rw(void) { } |
static inline void set_kernel_text_ro(void) { } |
#endif |
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#ifdef CONFIG_DEBUG_RODATA_TEST |
int rodata_test(void); |
#else |
static inline int rodata_test(void) |
{ |
return 0; |
} |
#endif |
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#endif /* _ASM_X86_CACHEFLUSH_H */ |