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x86: use generic fixmap.h
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Signed-off-by: Mark Salter <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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mosalter authored and torvalds committed Jan 24, 2014
1 parent d57c33c commit 114cefc
Showing 1 changed file with 1 addition and 58 deletions.
59 changes: 1 addition & 58 deletions arch/x86/include/asm/fixmap.h
Original file line number Diff line number Diff line change
Expand Up @@ -175,64 +175,7 @@ static inline void __set_fixmap(enum fixed_addresses idx,
}
#endif

#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)
__this_fixmap_does_not_exist();

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);
}

/* Return an pointer with offset calculated */
static __always_inline unsigned long
__set_fixmap_offset(enum fixed_addresses idx, phys_addr_t phys, pgprot_t flags)
{
__set_fixmap(idx, phys, flags);
return fix_to_virt(idx) + (phys & (PAGE_SIZE - 1));
}

#define set_fixmap_offset(idx, phys) \
__set_fixmap_offset(idx, phys, PAGE_KERNEL)

#define set_fixmap_offset_nocache(idx, phys) \
__set_fixmap_offset(idx, phys, PAGE_KERNEL_NOCACHE)
#include <asm-generic/fixmap.h>

#endif /* !__ASSEMBLY__ */
#endif /* _ASM_X86_FIXMAP_H */

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