arch/x86/include/asm/page_64_types.h

   1 #ifndef _ASM_X86_PAGE_64_DEFS_H
   2 #define _ASM_X86_PAGE_64_DEFS_H
   3
   4 #define THREAD_ORDER    1
   5 #define THREAD_SIZE  (PAGE_SIZE << THREAD_ORDER)
   6 #define CURRENT_MASK (~(THREAD_SIZE - 1))
   7
   8 #define EXCEPTION_STACK_ORDER 0
   9 #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
  10
  11 #define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
  12 #define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER)
  13
  14 #define IRQ_STACK_ORDER 2
  15 #define IRQ_STACK_SIZE (PAGE_SIZE << IRQ_STACK_ORDER)
  16
  17 #define STACKFAULT_STACK 1
  18 #define DOUBLEFAULT_STACK 2
  19 #define NMI_STACK 3
  20 #define DEBUG_STACK 4
  21 #define MCE_STACK 5
  22 #define N_EXCEPTION_STACKS 5  /* hw limit: 7 */
  23
  24 #define PUD_PAGE_SIZE           (_AC(1, UL) << PUD_SHIFT)
  25 #define PUD_PAGE_MASK           (~(PUD_PAGE_SIZE-1))
  26
  27 /*
  28  * Set __PAGE_OFFSET to the most negative possible address +
  29  * PGDIR_SIZE*16 (pgd slot 272).  The gap is to allow a space for a
  30  * hypervisor to fit.  Choosing 16 slots here is arbitrary, but it's
  31  * what Xen requires.
  32  */
  33 #define __PAGE_OFFSET           _AC(0xffff880000000000, UL)
  34
  35 #define __PHYSICAL_START        CONFIG_PHYSICAL_START
  36 #define __KERNEL_ALIGN          0x200000
  37
  38 /*
  39  * Make sure kernel is aligned to 2MB address. Catching it at compile
  40  * time is better. Change your config file and compile the kernel
  41  * for a 2MB aligned address (CONFIG_PHYSICAL_START)
  42  */
  43 #if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0
  44 #error "CONFIG_PHYSICAL_START must be a multiple of 2MB"
  45 #endif
  46
  47 #define __START_KERNEL          (__START_KERNEL_map + __PHYSICAL_START)
  48 #define __START_KERNEL_map      _AC(0xffffffff80000000, UL)
  49
  50 /* See Documentation/x86_64/mm.txt for a description of the memory map. */
  51 #define __PHYSICAL_MASK_SHIFT   46
  52 #define __VIRTUAL_MASK_SHIFT    48
  53
  54 /*
  55  * Kernel image size is limited to 512 MB (see level2_kernel_pgt in
  56  * arch/x86/kernel/head_64.S), and it is mapped here:
  57  */
  58 #define KERNEL_IMAGE_SIZE       (512 * 1024 * 1024)
  59 #define KERNEL_IMAGE_START      _AC(0xffffffff80000000, UL)
  60
  61 #ifndef __ASSEMBLY__
  62 void clear_page(void *page);
  63 void copy_page(void *to, void *from);
  64
  65 /* duplicated to the one in bootmem.h */
  66 extern unsigned long max_pfn;
  67 extern unsigned long phys_base;
  68
  69 extern unsigned long __phys_addr(unsigned long);
  70 #define __phys_reloc_hide(x)    (x)
  71
  72 #define vmemmap ((struct page *)VMEMMAP_START)
  73
  74 extern unsigned long init_memory_mapping(unsigned long start,
  75                                          unsigned long end);
  76
  77 extern void initmem_init(unsigned long start_pfn, unsigned long end_pfn);
  78 extern void free_initmem(void);
  79
  80 extern void init_extra_mapping_uc(unsigned long phys, unsigned long size);
  81 extern void init_extra_mapping_wb(unsigned long phys, unsigned long size);
  82
  83 #endif  /* !__ASSEMBLY__ */
  84
  85 #ifdef CONFIG_FLATMEM
  86 #define pfn_valid(pfn)          ((pfn) < max_pfn)
  87 #endif
  88
  89 #endif /* _ASM_X86_PAGE_64_DEFS_H */