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 */ 9extern unsigned long max_pfn; 10extern unsigned long phys_base; 11 12static 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 23extern unsigned long __phys_addr(unsigned long); 24extern 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 37void clear_page(void *page); 38void copy_page(void *to, void *from); 39 40#endif /* !__ASSEMBLY__ */ 41 42#endif /* _ASM_X86_PAGE_64_H */ 43