include/asm-x86/page_64.h

   1 #ifndef _X86_64_PAGE_H
   2 #define _X86_64_PAGE_H
   3
   4 #define PAGETABLE_LEVELS        4
   5
   6 #define THREAD_ORDER    1
   7 #define THREAD_SIZE  (PAGE_SIZE << THREAD_ORDER)
   8 #define CURRENT_MASK (~(THREAD_SIZE - 1))
   9
  10 #define EXCEPTION_STACK_ORDER 0
  11 #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
  12
  13 #define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
  14 #define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER)
  15
  16 #define IRQSTACK_ORDER 2
  17 #define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER)
  18
  19 #define STACKFAULT_STACK 1
  20 #define DOUBLEFAULT_STACK 2
  21 #define NMI_STACK 3
  22 #define DEBUG_STACK 4
  23 #define MCE_STACK 5
  24 #define N_EXCEPTION_STACKS 5  /* hw limit: 7 */
  25
  26 #define PUD_PAGE_SIZE           (_AC(1, UL) << PUD_SHIFT)
  27 #define PUD_PAGE_MASK           (~(PUD_PAGE_SIZE-1))
  28
  29 #define __PAGE_OFFSET           _AC(0xffff810000000000, UL)
  30
  31 #define __PHYSICAL_START        CONFIG_PHYSICAL_START
  32 #define __KERNEL_ALIGN          0x200000
  33
  34 /*
  35  * Make sure kernel is aligned to 2MB address. Catching it at compile
  36  * time is better. Change your config file and compile the kernel
  37  * for a 2MB aligned address (CONFIG_PHYSICAL_START)
  38  */
  39 #if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0
  40 #error "CONFIG_PHYSICAL_START must be a multiple of 2MB"
  41 #endif
  42
  43 #define __START_KERNEL          (__START_KERNEL_map + __PHYSICAL_START)
  44 #define __START_KERNEL_map      _AC(0xffffffff80000000, UL)
  45
  46 /* See Documentation/x86_64/mm.txt for a description of the memory map. */
  47 #define __PHYSICAL_MASK_SHIFT   46
  48 #define __VIRTUAL_MASK_SHIFT    48
  49
  50 /*
  51  * Kernel image size is limited to 512 MB (see level2_kernel_pgt in
  52  * arch/x86/kernel/head_64.S), and it is mapped here:
  53  */
  54 #define KERNEL_IMAGE_SIZE       (512 * 1024 * 1024)
  55 #define KERNEL_IMAGE_START      _AC(0xffffffff80000000, UL)
  56
  57 #ifndef __ASSEMBLY__
  58 void clear_page(void *page);
  59 void copy_page(void *to, void *from);
  60
  61 extern unsigned long end_pfn;
  62 extern unsigned long phys_base;
  63
  64 extern unsigned long __phys_addr(unsigned long);
  65 #define __phys_reloc_hide(x)    (x)
  66
  67 /*
  68  * These are used to make use of C type-checking..
  69  */
  70 typedef unsigned long   pteval_t;
  71 typedef unsigned long   pmdval_t;
  72 typedef unsigned long   pudval_t;
  73 typedef unsigned long   pgdval_t;
  74 typedef unsigned long   pgprotval_t;
  75 typedef unsigned long   phys_addr_t;
  76
  77 typedef struct page *pgtable_t;
  78
  79 typedef struct { pteval_t pte; } pte_t;
  80
  81 #define vmemmap ((struct page *)VMEMMAP_START)
  82
  83 extern unsigned long init_memory_mapping(unsigned long start,
  84                                          unsigned long end);
  85
  86 #endif  /* !__ASSEMBLY__ */
  87
  88 #ifdef CONFIG_FLATMEM
  89 #define pfn_valid(pfn)          ((pfn) < end_pfn)
  90 #endif
  91
  92
  93 #endif /* _X86_64_PAGE_H */