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#include <linux/types.h>
   6
   7/* PAGE_SHIFT determines the page size */
   8#define PAGE_SHIFT              12
   9#define PAGE_SIZE               (_AC(1,UL) << PAGE_SHIFT)
  10#define PAGE_MASK               (~(PAGE_SIZE-1))
  11
  12#define PMD_PAGE_SIZE           (_AC(1, UL) << PMD_SHIFT)
  13#define PMD_PAGE_MASK           (~(PMD_PAGE_SIZE-1))
  14
  15#define PUD_PAGE_SIZE           (_AC(1, UL) << PUD_SHIFT)
  16#define PUD_PAGE_MASK           (~(PUD_PAGE_SIZE-1))
  17
  18#define __PHYSICAL_MASK         ((phys_addr_t)((1ULL << __PHYSICAL_MASK_SHIFT) - 1))
  19#define __VIRTUAL_MASK          ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
  20
  21/* Cast *PAGE_MASK to a signed type so that it is sign-extended if
  22   virtual addresses are 32-bits but physical addresses are larger
  23   (ie, 32-bit PAE). */
  24#define PHYSICAL_PAGE_MASK      (((signed long)PAGE_MASK) & __PHYSICAL_MASK)
  25#define PHYSICAL_PMD_PAGE_MASK  (((signed long)PMD_PAGE_MASK) & __PHYSICAL_MASK)
  26#define PHYSICAL_PUD_PAGE_MASK  (((signed long)PUD_PAGE_MASK) & __PHYSICAL_MASK)
  27
  28#define HPAGE_SHIFT             PMD_SHIFT
  29#define HPAGE_SIZE              (_AC(1,UL) << HPAGE_SHIFT)
  30#define HPAGE_MASK              (~(HPAGE_SIZE - 1))
  31#define HUGETLB_PAGE_ORDER      (HPAGE_SHIFT - PAGE_SHIFT)
  32
  33#define HUGE_MAX_HSTATE 2
  34
  35#define PAGE_OFFSET             ((unsigned long)__PAGE_OFFSET)
  36
  37#define VM_DATA_DEFAULT_FLAGS \
  38        (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
  39         VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  40
  41#define __PHYSICAL_START        ALIGN(CONFIG_PHYSICAL_START, \
  42                                      CONFIG_PHYSICAL_ALIGN)
  43
  44#define __START_KERNEL          (__START_KERNEL_map + __PHYSICAL_START)
  45
  46#ifdef CONFIG_X86_64
  47#include <asm/page_64_types.h>
  48#define IOREMAP_MAX_ORDER       (PUD_SHIFT)
  49#else
  50#include <asm/page_32_types.h>
  51#define IOREMAP_MAX_ORDER       (PMD_SHIFT)
  52#endif  /* CONFIG_X86_64 */
  53
  54#ifndef __ASSEMBLY__
  55
  56extern int devmem_is_allowed(unsigned long pagenr);
  57
  58extern unsigned long max_low_pfn_mapped;
  59extern unsigned long max_pfn_mapped;
  60
  61static inline phys_addr_t get_max_mapped(void)
  62{
  63        return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT;
  64}
  65
  66bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn);
  67
  68extern unsigned long init_memory_mapping(unsigned long start,
  69                                         unsigned long end);
  70
  71extern void initmem_init(void);
  72
  73#endif  /* !__ASSEMBLY__ */
  74
  75#endif  /* _ASM_X86_PAGE_DEFS_H */
  76