blob: 44d4f82173496d2984b9c6612c4d4fe48341a146 [file] [log] [blame]
#ifndef _ASM_FIXMAP_H
#define _ASM_FIXMAP_H
#ifdef CONFIG_X86_32
# include "fixmap_32.h"
# include "fixmap_64.h"
extern int fixmaps_set;
void __native_set_fixmap(enum fixed_addresses idx, pte_t pte);
void native_set_fixmap(enum fixed_addresses idx,
unsigned long phys, pgprot_t flags);
static inline void __set_fixmap(enum fixed_addresses idx,
unsigned long phys, pgprot_t flags)
native_set_fixmap(idx, phys, flags);
#define set_fixmap(idx, phys) \
__set_fixmap(idx, phys, PAGE_KERNEL)
* Some hardware wants to get fixmapped without caching.
#define set_fixmap_nocache(idx, phys) \
__set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
#define clear_fixmap(idx) \
__set_fixmap(idx, 0, __pgprot(0))
#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
#define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT)
extern void __this_fixmap_does_not_exist(void);
* 'index to address' translation. If anyone tries to use the idx
* directly without translation, we catch the bug with a NULL-deference
* kernel oops. Illegal ranges of incoming indices are caught too.
static __always_inline unsigned long fix_to_virt(const unsigned int idx)
* this branch gets completely eliminated after inlining,
* except when someone tries to use fixaddr indices in an
* illegal way. (such as mixing up address types or using
* out-of-range indices).
* If it doesn't get removed, the linker will complain
* loudly with a reasonably clear error message..
if (idx >= __end_of_fixed_addresses)
return __fix_to_virt(idx);
static inline unsigned long virt_to_fix(const unsigned long vaddr)
BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
return __virt_to_fix(vaddr);