arch/x86/include/asm/page_types.h

   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
  43 struct pgprot;
  44
  45 extern int page_is_ram(unsigned long pagenr);
  46 extern int devmem_is_allowed(unsigned long pagenr);
  47 extern void map_devmem(unsigned long pfn, unsigned long size,
  48                        struct pgprot vma_prot);
  49 extern void unmap_devmem(unsigned long pfn, unsigned long size,
  50                          struct pgprot vma_prot);
  51
  52 extern unsigned long max_low_pfn_mapped;
  53 extern unsigned long max_pfn_mapped;
  54
  55 #endif  /* !__ASSEMBLY__ */
  56
  57 #endif  /* _ASM_X86_PAGE_DEFS_H */