projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 1965aae3 PA |
1 | #ifndef _ASM_X86_FIXMAP_H |
| 2 | #define _ASM_X86_FIXMAP_H | |
| 3ec96783 | 3 | |
| 96a388de TG |
4 | #ifdef CONFIG_X86_32 |
| 5 | # include "fixmap_32.h" | |
| 6 | #else | |
| 7 | # include "fixmap_64.h" | |
| 8 | #endif | |
| 3ec96783 | 9 | |
| 7c7e6e07 JF |
10 | extern int fixmaps_set; |
| 11 | ||
| fd940934 KP |
12 | extern pte_t *kmap_pte; |
| 13 | extern pgprot_t kmap_prot; | |
| 14 | extern pte_t *pkmap_page_table; | |
| 15 | ||
| aeaaa59c JF |
16 | void __native_set_fixmap(enum fixed_addresses idx, pte_t pte); |
| 17 | void native_set_fixmap(enum fixed_addresses idx, | |
| 18 | unsigned long phys, pgprot_t flags); | |
| 19 | ||
| 20 | #ifndef CONFIG_PARAVIRT | |
| 21 | static inline void __set_fixmap(enum fixed_addresses idx, | |
| 22 | unsigned long phys, pgprot_t flags) | |
| 23 | { | |
| 24 | native_set_fixmap(idx, phys, flags); | |
| 25 | } | |
| 26 | #endif | |
| 27 | ||
| 944256e0 JF |
28 | #define set_fixmap(idx, phys) \ |
| 29 | __set_fixmap(idx, phys, PAGE_KERNEL) | |
| 30 | ||
| 31 | /* | |
| 32 | * Some hardware wants to get fixmapped without caching. | |
| 33 | */ | |
| 34 | #define set_fixmap_nocache(idx, phys) \ | |
| 35 | __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE) | |
| 36 | ||
| 3ec96783 IM |
37 | #define clear_fixmap(idx) \ |
| 38 | __set_fixmap(idx, 0, __pgprot(0)) | |
| 39 | ||
| 944256e0 JF |
40 | #define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) |
| 41 | #define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT) | |
| 42 | ||
| 43 | extern void __this_fixmap_does_not_exist(void); | |
| 44 | ||
| 45 | /* | |
| 46 | * 'index to address' translation. If anyone tries to use the idx | |
| 47 | * directly without translation, we catch the bug with a NULL-deference | |
| 48 | * kernel oops. Illegal ranges of incoming indices are caught too. | |
| 49 | */ | |
| 50 | static __always_inline unsigned long fix_to_virt(const unsigned int idx) | |
| 51 | { | |
| 52 | /* | |
| 53 | * this branch gets completely eliminated after inlining, | |
| 54 | * except when someone tries to use fixaddr indices in an | |
| 55 | * illegal way. (such as mixing up address types or using | |
| 56 | * out-of-range indices). | |
| 57 | * | |
| 58 | * If it doesn't get removed, the linker will complain | |
| 59 | * loudly with a reasonably clear error message.. | |
| 60 | */ | |
| 61 | if (idx >= __end_of_fixed_addresses) | |
| 62 | __this_fixmap_does_not_exist(); | |
| 63 | ||
| 64 | return __fix_to_virt(idx); | |
| 65 | } | |
| 66 | ||
| 67 | static inline unsigned long virt_to_fix(const unsigned long vaddr) | |
| 68 | { | |
| 69 | BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START); | |
| 70 | return __virt_to_fix(vaddr); | |
| 71 | } | |
| 1965aae3 | 72 | #endif /* _ASM_X86_FIXMAP_H */ |