diff options
author | Mark Salter <msalter@redhat.com> | 2014-01-23 18:53:50 -0500 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-23 19:36:54 -0500 |
commit | 114cefc87ec445207f6968f584ea5edcb474f541 (patch) | |
tree | 975681568fe943a36b9e1afb9d54b161b2efa4e1 /arch/x86 | |
parent | d57c33c5daa4efa9e4d303bd0faf868080b532be (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.h | 59 |
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 | |||
193 | extern 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 | */ | ||
200 | static __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 | |||
217 | static 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 */ | ||
224 | static __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 */ |