include/asm-x86_64/page.h

   1 #ifndef _X86_64_PAGE_H
   2 #define _X86_64_PAGE_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 #define PHYSICAL_PAGE_MASK      (~(PAGE_SIZE-1) & __PHYSICAL_MASK)
  11
  12 #define THREAD_ORDER 1
  13 #define THREAD_SIZE  (PAGE_SIZE << THREAD_ORDER)
  14 #define CURRENT_MASK (~(THREAD_SIZE-1))
  15
  16 #define EXCEPTION_STACK_ORDER 0
  17 #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
  18
  19 #define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
  20 #define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER)
  21
  22 #define IRQSTACK_ORDER 2
  23 #define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER)
  24
  25 #define STACKFAULT_STACK 1
  26 #define DOUBLEFAULT_STACK 2
  27 #define NMI_STACK 3
  28 #define DEBUG_STACK 4
  29 #define MCE_STACK 5
  30 #define N_EXCEPTION_STACKS 5  /* hw limit: 7 */
  31
  32 #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
  33 #define LARGE_PAGE_SIZE (_AC(1,UL) << PMD_SHIFT)
  34
  35 #define HPAGE_SHIFT PMD_SHIFT
  36 #define HPAGE_SIZE      (_AC(1,UL) << HPAGE_SHIFT)
  37 #define HPAGE_MASK      (~(HPAGE_SIZE - 1))
  38 #define HUGETLB_PAGE_ORDER      (HPAGE_SHIFT - PAGE_SHIFT)
  39
  40 #ifdef __KERNEL__
  41 #ifndef __ASSEMBLY__
  42
  43 extern unsigned long end_pfn;
  44
  45 void clear_page(void *);
  46 void copy_page(void *, void *);
  47
  48 #define clear_user_page(page, vaddr, pg)        clear_page(page)
  49 #define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
  50
  51 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
  52         alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
  53 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
  54 /*
  55  * These are used to make use of C type-checking..
  56  */
  57 typedef struct { unsigned long pte; } pte_t;
  58 typedef struct { unsigned long pmd; } pmd_t;
  59 typedef struct { unsigned long pud; } pud_t;
  60 typedef struct { unsigned long pgd; } pgd_t;
  61 #define PTE_MASK        PHYSICAL_PAGE_MASK
  62
  63 typedef struct { unsigned long pgprot; } pgprot_t;
  64
  65 extern unsigned long phys_base;
  66
  67 #define pte_val(x)      ((x).pte)
  68 #define pmd_val(x)      ((x).pmd)
  69 #define pud_val(x)      ((x).pud)
  70 #define pgd_val(x)      ((x).pgd)
  71 #define pgprot_val(x)   ((x).pgprot)
  72
  73 #define __pte(x) ((pte_t) { (x) } )
  74 #define __pmd(x) ((pmd_t) { (x) } )
  75 #define __pud(x) ((pud_t) { (x) } )
  76 #define __pgd(x) ((pgd_t) { (x) } )
  77 #define __pgprot(x)     ((pgprot_t) { (x) } )
  78
  79 #endif /* !__ASSEMBLY__ */
  80
  81 #define __PHYSICAL_START        CONFIG_PHYSICAL_START
  82 #define __KERNEL_ALIGN          0x200000
  83
  84 /*
  85  * Make sure kernel is aligned to 2MB address. Catching it at compile
  86  * time is better. Change your config file and compile the kernel
  87  * for a 2MB aligned address (CONFIG_PHYSICAL_START)
  88  */
  89 #if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0
  90 #error "CONFIG_PHYSICAL_START must be a multiple of 2MB"
  91 #endif
  92
  93 #define __START_KERNEL          (__START_KERNEL_map + __PHYSICAL_START)
  94 #define __START_KERNEL_map      _AC(0xffffffff80000000, UL)
  95 #define __PAGE_OFFSET           _AC(0xffff810000000000, UL)
  96
  97 /* to align the pointer to the (next) page boundary */
  98 #define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
  99
 100 /* See Documentation/x86_64/mm.txt for a description of the memory map. */
 101 #define __PHYSICAL_MASK_SHIFT   46
 102 #define __PHYSICAL_MASK         ((_AC(1,UL) << __PHYSICAL_MASK_SHIFT) - 1)
 103 #define __VIRTUAL_MASK_SHIFT    48
 104 #define __VIRTUAL_MASK          ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - 1)
 105
 106 #define KERNEL_TEXT_SIZE  (40*1024*1024)
 107 #define KERNEL_TEXT_START _AC(0xffffffff80000000, UL)
 108 #define PAGE_OFFSET             __PAGE_OFFSET
 109
 110 #ifndef __ASSEMBLY__
 111
 112 #include <asm/bug.h>
 113
 114 extern unsigned long __phys_addr(unsigned long);
 115
 116 #endif /* __ASSEMBLY__ */
 117
 118 #define __pa(x)         __phys_addr((unsigned long)(x))
 119 #define __pa_symbol(x)  __phys_addr((unsigned long)(x))
 120
 121 #define __va(x)                 ((void *)((unsigned long)(x)+PAGE_OFFSET))
 122 #define __boot_va(x)            __va(x)
 123 #define __boot_pa(x)            __pa(x)
 124 #ifdef CONFIG_FLATMEM
 125 #define pfn_valid(pfn)          ((pfn) < end_pfn)
 126 #endif
 127
 128 #define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
 129 #define virt_addr_valid(kaddr)  pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
 130 #define pfn_to_kaddr(pfn)      __va((pfn) << PAGE_SHIFT)
 131
 132 #define VM_DATA_DEFAULT_FLAGS \
 133         (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
 134          VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 135
 136 #define __HAVE_ARCH_GATE_AREA 1
 137
 138 #include <asm-generic/memory_model.h>
 139 #include <asm-generic/page.h>
 140
 141 #endif /* __KERNEL__ */
 142
 143 #endif /* _X86_64_PAGE_H */