2008-10-23 12:26:29 +07:00
|
|
|
#ifndef _ASM_X86_CACHEFLUSH_H
|
|
|
|
#define _ASM_X86_CACHEFLUSH_H
|
2007-10-16 04:28:20 +07:00
|
|
|
|
|
|
|
/* Keep includes the same across arches. */
|
|
|
|
#include <linux/mm.h>
|
|
|
|
|
|
|
|
/* Caches aren't brain-dead on the intel. */
|
2009-02-25 09:01:40 +07:00
|
|
|
static inline void flush_cache_all(void) { }
|
|
|
|
static inline void flush_cache_mm(struct mm_struct *mm) { }
|
|
|
|
static inline void flush_cache_dup_mm(struct mm_struct *mm) { }
|
|
|
|
static inline void flush_cache_range(struct vm_area_struct *vma,
|
|
|
|
unsigned long start, unsigned long end) { }
|
|
|
|
static inline void flush_cache_page(struct vm_area_struct *vma,
|
|
|
|
unsigned long vmaddr, unsigned long pfn) { }
|
|
|
|
static inline void flush_dcache_page(struct page *page) { }
|
|
|
|
static inline void flush_dcache_mmap_lock(struct address_space *mapping) { }
|
|
|
|
static inline void flush_dcache_mmap_unlock(struct address_space *mapping) { }
|
|
|
|
static inline void flush_icache_range(unsigned long start,
|
|
|
|
unsigned long end) { }
|
|
|
|
static inline void flush_icache_page(struct vm_area_struct *vma,
|
|
|
|
struct page *page) { }
|
|
|
|
static inline void flush_icache_user_range(struct vm_area_struct *vma,
|
|
|
|
struct page *page,
|
|
|
|
unsigned long addr,
|
|
|
|
unsigned long len) { }
|
|
|
|
static inline void flush_cache_vmap(unsigned long start, unsigned long end) { }
|
|
|
|
static inline void flush_cache_vunmap(unsigned long start,
|
|
|
|
unsigned long end) { }
|
2007-10-16 04:28:20 +07:00
|
|
|
|
2009-02-25 09:01:40 +07:00
|
|
|
static inline void copy_to_user_page(struct vm_area_struct *vma,
|
|
|
|
struct page *page, unsigned long vaddr,
|
|
|
|
void *dst, const void *src,
|
|
|
|
unsigned long len)
|
|
|
|
{
|
|
|
|
memcpy(dst, src, len);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void copy_from_user_page(struct vm_area_struct *vma,
|
|
|
|
struct page *page, unsigned long vaddr,
|
|
|
|
void *dst, const void *src,
|
|
|
|
unsigned long len)
|
|
|
|
{
|
|
|
|
memcpy(dst, src, len);
|
|
|
|
}
|
2007-10-16 04:28:20 +07:00
|
|
|
|
2008-09-24 22:53:33 +07:00
|
|
|
#define PG_non_WB PG_arch_1
|
|
|
|
PAGEFLAG(NonWB, non_WB)
|
x86: a new API for drivers/etc to control cache and other page attributes
Right now, if drivers or other code want to change, say, a cache attribute of a
page, the only API they have is change_page_attr(). c-p-a is a really bad API
for this, because it forces the caller to know *ALL* the attributes he wants
for the page, not just the 1 thing he wants to change. So code that wants to
set a page uncachable, needs to be aware of the NX status as well etc etc etc.
This patch introduces a set of new APIs for this, set_pages_<attr> and
set_memory_<attr>, that offer a logical change to the user, and leave all
attributes not implied by the requested logical change alone.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 19:34:06 +07:00
|
|
|
|
2008-04-17 22:41:31 +07:00
|
|
|
/*
|
|
|
|
* 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.
|
|
|
|
*/
|
x86: a new API for drivers/etc to control cache and other page attributes
Right now, if drivers or other code want to change, say, a cache attribute of a
page, the only API they have is change_page_attr(). c-p-a is a really bad API
for this, because it forces the caller to know *ALL* the attributes he wants
for the page, not just the 1 thing he wants to change. So code that wants to
set a page uncachable, needs to be aware of the NX status as well etc etc etc.
This patch introduces a set of new APIs for this, set_pages_<attr> and
set_memory_<attr>, that offer a logical change to the user, and leave all
attributes not implied by the requested logical change alone.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 19:34:06 +07:00
|
|
|
|
2008-03-19 07:00:18 +07:00
|
|
|
int _set_memory_uc(unsigned long addr, int numpages);
|
2008-03-19 07:00:23 +07:00
|
|
|
int _set_memory_wc(unsigned long addr, int numpages);
|
2008-03-19 07:00:18 +07:00
|
|
|
int _set_memory_wb(unsigned long addr, int numpages);
|
x86: a new API for drivers/etc to control cache and other page attributes
Right now, if drivers or other code want to change, say, a cache attribute of a
page, the only API they have is change_page_attr(). c-p-a is a really bad API
for this, because it forces the caller to know *ALL* the attributes he wants
for the page, not just the 1 thing he wants to change. So code that wants to
set a page uncachable, needs to be aware of the NX status as well etc etc etc.
This patch introduces a set of new APIs for this, set_pages_<attr> and
set_memory_<attr>, that offer a logical change to the user, and leave all
attributes not implied by the requested logical change alone.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 19:34:06 +07:00
|
|
|
int set_memory_uc(unsigned long addr, int numpages);
|
2008-03-19 07:00:23 +07:00
|
|
|
int set_memory_wc(unsigned long addr, int numpages);
|
x86: a new API for drivers/etc to control cache and other page attributes
Right now, if drivers or other code want to change, say, a cache attribute of a
page, the only API they have is change_page_attr(). c-p-a is a really bad API
for this, because it forces the caller to know *ALL* the attributes he wants
for the page, not just the 1 thing he wants to change. So code that wants to
set a page uncachable, needs to be aware of the NX status as well etc etc etc.
This patch introduces a set of new APIs for this, set_pages_<attr> and
set_memory_<attr>, that offer a logical change to the user, and leave all
attributes not implied by the requested logical change alone.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 19:34:06 +07:00
|
|
|
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);
|
2008-01-30 19:34:07 +07:00
|
|
|
int set_memory_np(unsigned long addr, int numpages);
|
2008-03-12 09:53:29 +07:00
|
|
|
int set_memory_4k(unsigned long addr, int numpages);
|
x86: a new API for drivers/etc to control cache and other page attributes
Right now, if drivers or other code want to change, say, a cache attribute of a
page, the only API they have is change_page_attr(). c-p-a is a really bad API
for this, because it forces the caller to know *ALL* the attributes he wants
for the page, not just the 1 thing he wants to change. So code that wants to
set a page uncachable, needs to be aware of the NX status as well etc etc etc.
This patch introduces a set of new APIs for this, set_pages_<attr> and
set_memory_<attr>, that offer a logical change to the user, and leave all
attributes not implied by the requested logical change alone.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 19:34:06 +07:00
|
|
|
|
2008-08-21 09:46:06 +07:00
|
|
|
int set_memory_array_uc(unsigned long *addr, int addrinarray);
|
|
|
|
int set_memory_array_wb(unsigned long *addr, int addrinarray);
|
|
|
|
|
2009-03-20 04:51:15 +07:00
|
|
|
int set_pages_array_uc(struct page **pages, int addrinarray);
|
|
|
|
int set_pages_array_wb(struct page **pages, int addrinarray);
|
|
|
|
|
2008-04-17 22:41:31 +07:00
|
|
|
/*
|
|
|
|
* 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);
|
|
|
|
|
|
|
|
|
2008-01-30 19:34:09 +07:00
|
|
|
void clflush_cache_range(void *addr, unsigned int size);
|
2007-10-16 04:28:20 +07:00
|
|
|
|
|
|
|
#ifdef CONFIG_DEBUG_RODATA
|
|
|
|
void mark_rodata_ro(void);
|
2008-02-13 03:12:01 +07:00
|
|
|
extern const int rodata_test_data;
|
2009-02-18 05:57:30 +07:00
|
|
|
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) { }
|
2007-10-16 04:28:20 +07:00
|
|
|
#endif
|
2008-02-13 03:12:01 +07:00
|
|
|
|
2008-01-30 19:34:08 +07:00
|
|
|
#ifdef CONFIG_DEBUG_RODATA_TEST
|
2008-02-13 03:12:01 +07:00
|
|
|
int rodata_test(void);
|
2008-01-30 19:34:08 +07:00
|
|
|
#else
|
2008-02-13 03:12:01 +07:00
|
|
|
static inline int rodata_test(void)
|
2008-01-30 19:34:08 +07:00
|
|
|
{
|
2008-02-13 03:12:01 +07:00
|
|
|
return 0;
|
2008-01-30 19:34:08 +07:00
|
|
|
}
|
|
|
|
#endif
|
2007-10-16 04:28:20 +07:00
|
|
|
|
2008-10-23 12:26:29 +07:00
|
|
|
#endif /* _ASM_X86_CACHEFLUSH_H */
|