| Nicholas Flintham | 1e3d311 | 2013-04-10 10:48:38 +0100 | [diff] [blame^] | 1 | #ifndef _ASM_FIXMAP_H |
| 2 | #define _ASM_FIXMAP_H |
| 3 | |
| 4 | |
| 5 | #define FIXADDR_START 0xfff00000UL |
| 6 | #define FIXADDR_TOP 0xfffe0000UL |
| 7 | #define FIXADDR_SIZE (FIXADDR_TOP - FIXADDR_START) |
| 8 | |
| 9 | #define FIX_KMAP_BEGIN 0 |
| 10 | #define FIX_KMAP_END (FIXADDR_SIZE >> PAGE_SHIFT) |
| 11 | |
| 12 | #define __fix_to_virt(x) (FIXADDR_START + ((x) << PAGE_SHIFT)) |
| 13 | #define __virt_to_fix(x) (((x) - FIXADDR_START) >> PAGE_SHIFT) |
| 14 | |
| 15 | extern void __this_fixmap_does_not_exist(void); |
| 16 | |
| 17 | static inline unsigned long fix_to_virt(const unsigned int idx) |
| 18 | { |
| 19 | if (idx >= FIX_KMAP_END) |
| 20 | __this_fixmap_does_not_exist(); |
| 21 | return __fix_to_virt(idx); |
| 22 | } |
| 23 | |
| 24 | static inline unsigned int virt_to_fix(const unsigned long vaddr) |
| 25 | { |
| 26 | BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START); |
| 27 | return __virt_to_fix(vaddr); |
| 28 | } |
| 29 | |
| 30 | #endif |