| * Nothing too fancy for now. |
| * On ARM we already have well known fixed virtual addresses imposed by |
| * the architecture such as the vector page which is located at 0xffff0000, |
| * therefore a second level page table is already allocated covering |
| * The cache flushing code in proc-xscale.S uses the virtual area between |
| * 0xfffe0000 and 0xfffeffff. |
| #define FIXADDR_START 0xfff00000UL |
| #define FIXADDR_TOP 0xfffe0000UL |
| #define FIXADDR_SIZE (FIXADDR_TOP - FIXADDR_START) |
| #define FIX_KMAP_END (FIXADDR_SIZE >> PAGE_SHIFT) |
| #define __fix_to_virt(x) (FIXADDR_START + ((x) << PAGE_SHIFT)) |
| #define __virt_to_fix(x) (((x) - FIXADDR_START) >> PAGE_SHIFT) |
| extern void __this_fixmap_does_not_exist(void); |
| static inline unsigned long fix_to_virt(const unsigned int idx) |
| __this_fixmap_does_not_exist(); |
| return __fix_to_virt(idx); |
| static inline unsigned int virt_to_fix(const unsigned long vaddr) |
| BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START); |
| return __virt_to_fix(vaddr); |