1 #ifndef _ASM_FIXMAP_H 2 #define _ASM_FIXMAP_H 3 4 #define FIXADDR_START 0xffc00000UL 5 #define FIXADDR_TOP 0xffe00000UL 6 #define FIXADDR_SIZE (FIXADDR_TOP - FIXADDR_START) 7 8 #define FIX_KMAP_NR_PTES (FIXADDR_SIZE >> PAGE_SHIFT) 9 10 #define __fix_to_virt(x) (FIXADDR_START + ((x) << PAGE_SHIFT)) 11 #define __virt_to_fix(x) (((x) - FIXADDR_START) >> PAGE_SHIFT) 12 13 extern void __this_fixmap_does_not_exist(void); 14 15 static inline unsigned long fix_to_virt(const unsigned int idx) 16 { 17 if (idx >= FIX_KMAP_NR_PTES) 18 __this_fixmap_does_not_exist(); 19 return __fix_to_virt(idx); 20 } 21 22 static inline unsigned int virt_to_fix(const unsigned long vaddr) 23 { 24 BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START); 25 return __virt_to_fix(vaddr); 26 } 27 28 #endif 29