LXR linux/arch/x86/include/asm/page

   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#ifdef CONFIG_X86_VSYSCALL_EMULATION
  43# define __HAVE_ARCH_GATE_AREA 1
  44#endif
  45
  46#endif /* _ASM_X86_PAGE_64_H */
  47