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