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

   1#ifndef _ASM_X86_PAGE_DEFS_H
   2#define _ASM_X86_PAGE_DEFS_H
   3
   4#include <linux/const.h>
   5
   6/* PAGE_SHIFT determines the page size */
   7#define PAGE_SHIFT      12
   8#define PAGE_SIZE       (_AC(1,UL) << PAGE_SHIFT)
   9#define PAGE_MASK       (~(PAGE_SIZE-1))
  10
  11#define __PHYSICAL_MASK         ((phys_addr_t)(1ULL << __PHYSICAL_MASK_SHIFT) - 1)
  12#define __VIRTUAL_MASK          ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
  13
  14/* Cast PAGE_MASK to a signed type so that it is sign-extended if
  15   virtual addresses are 32-bits but physical addresses are larger
  16   (ie, 32-bit PAE). */
  17#define PHYSICAL_PAGE_MASK      (((signed long)PAGE_MASK) & __PHYSICAL_MASK)
  18
  19#define PMD_PAGE_SIZE           (_AC(1, UL) << PMD_SHIFT)
  20#define PMD_PAGE_MASK           (~(PMD_PAGE_SIZE-1))
  21
  22#define HPAGE_SHIFT             PMD_SHIFT
  23#define HPAGE_SIZE              (_AC(1,UL) << HPAGE_SHIFT)
  24#define HPAGE_MASK              (~(HPAGE_SIZE - 1))
  25#define HUGETLB_PAGE_ORDER      (HPAGE_SHIFT - PAGE_SHIFT)
  26
  27#define HUGE_MAX_HSTATE 2
  28
  29#define PAGE_OFFSET             ((unsigned long)__PAGE_OFFSET)
  30
  31#define VM_DATA_DEFAULT_FLAGS \
  32        (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
  33         VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  34
  35#ifdef CONFIG_X86_64
  36#include <asm/page_64_types.h>
  37#else
  38#include <asm/page_32_types.h>
  39#endif  /* CONFIG_X86_64 */
  40
  41#ifndef __ASSEMBLY__
  42
  43extern int page_is_ram(unsigned long pagenr);
  44extern int devmem_is_allowed(unsigned long pagenr);
  45
  46extern unsigned long max_low_pfn_mapped;
  47extern unsigned long max_pfn_mapped;
  48
  49extern unsigned long init_memory_mapping(unsigned long start,
  50                                         unsigned long end);
  51
  52extern void initmem_init(unsigned long start_pfn, unsigned long end_pfn);
  53extern void free_initmem(void);
  54
  55#endif  /* !__ASSEMBLY__ */
  56
  57#endif  /* _ASM_X86_PAGE_DEFS_H */
  58