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authorMark Salter <msalter@redhat.com>2014-01-23 18:53:50 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-23 19:36:54 -0500
commit114cefc87ec445207f6968f584ea5edcb474f541 (patch)
tree975681568fe943a36b9e1afb9d54b161b2efa4e1 /arch/x86
parentd57c33c5daa4efa9e4d303bd0faf868080b532be (diff)
x86: use generic fixmap.h
Signed-off-by: Mark Salter <msalter@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/include/asm/fixmap.h59
1 files changed, 1 insertions, 58 deletions
diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h
index e846225265ed..7252cd339175 100644
--- a/arch/x86/include/asm/fixmap.h
+++ b/arch/x86/include/asm/fixmap.h
@@ -175,64 +175,7 @@ static inline void __set_fixmap(enum fixed_addresses idx,
175} 175}
176#endif 176#endif
177 177
178#define set_fixmap(idx, phys) \ 178#include <asm-generic/fixmap.h>
179 __set_fixmap(idx, phys, PAGE_KERNEL)
180
181/*
182 * Some hardware wants to get fixmapped without caching.
183 */
184#define set_fixmap_nocache(idx, phys) \
185 __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
186
187#define clear_fixmap(idx) \
188 __set_fixmap(idx, 0, __pgprot(0))
189
190#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
191#define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT)
192
193extern void __this_fixmap_does_not_exist(void);
194
195/*
196 * 'index to address' translation. If anyone tries to use the idx
197 * directly without translation, we catch the bug with a NULL-deference
198 * kernel oops. Illegal ranges of incoming indices are caught too.
199 */
200static __always_inline unsigned long fix_to_virt(const unsigned int idx)
201{
202 /*
203 * this branch gets completely eliminated after inlining,
204 * except when someone tries to use fixaddr indices in an
205 * illegal way. (such as mixing up address types or using
206 * out-of-range indices).
207 *
208 * If it doesn't get removed, the linker will complain
209 * loudly with a reasonably clear error message..
210 */
211 if (idx >= __end_of_fixed_addresses)
212 __this_fixmap_does_not_exist();
213
214 return __fix_to_virt(idx);
215}
216
217static inline unsigned long virt_to_fix(const unsigned long vaddr)
218{
219 BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
220 return __virt_to_fix(vaddr);
221}
222
223/* Return an pointer with offset calculated */
224static __always_inline unsigned long
225__set_fixmap_offset(enum fixed_addresses idx, phys_addr_t phys, pgprot_t flags)
226{
227 __set_fixmap(idx, phys, flags);
228 return fix_to_virt(idx) + (phys & (PAGE_SIZE - 1));
229}
230
231#define set_fixmap_offset(idx, phys) \
232 __set_fixmap_offset(idx, phys, PAGE_KERNEL)
233
234#define set_fixmap_offset_nocache(idx, phys) \
235 __set_fixmap_offset(idx, phys, PAGE_KERNEL_NOCACHE)
236 179
237#endif /* !__ASSEMBLY__ */ 180#endif /* !__ASSEMBLY__ */
238#endif /* _ASM_X86_FIXMAP_H */ 181#endif /* _ASM_X86_FIXMAP_H */