1 #ifndef _ASM_X86_PAGE_64_H 2 #define _ASM_X86_PAGE_64_H 3 4 #include <asm/page_64_types.h> 5 6 #ifndef __ASSEMBLY__ 7 8 /* duplicated to the one in bootmem.h */ 9 extern unsigned long max_pfn; 10 extern unsigned long phys_base; 11 12 static inline unsigned long __phys_addr_nodebug(unsigned long x) 13 { 14 unsigned long y = x - __START_KERNEL_map; 15 16 /* use the carry flag to determine if x was < __START_KERNEL_map */ 17 x = y + ((x > y) ? phys_base : (__START_KERNEL_map - PAGE_OFFSET)); 18 19 return x; 20 } 21 22 #ifdef CONFIG_DEBUG_VIRTUAL 23 extern unsigned long __phys_addr(unsigned long); 24 extern unsigned long __phys_addr_symbol(unsigned long); 25 #else 26 #define __phys_addr(x) __phys_addr_nodebug(x) 27 #define __phys_addr_symbol(x) \ 28 ((unsigned long)(x) - __START_KERNEL_map + phys_base) 29 #endif 30 31 #define __phys_reloc_hide(x) (x) 32 33 #ifdef CONFIG_FLATMEM 34 #define pfn_valid(pfn) ((pfn) < max_pfn) 35 #endif 36 37 void clear_page(void *page); 38 void copy_page(void *to, void *from); 39 40 #endif /* !__ASSEMBLY__ */ 41 42 #endif /* _ASM_X86_PAGE_64_H */ 43