arch/x86/include/asm/page_64.h

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