1 #ifndef _ASM_X86_PAGE_64_H 2 #define _ASM_X86_PAGE_64_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 /* 30 * Set __PAGE_OFFSET to the most negative possible address + 31 * PGDIR_SIZE*16 (pgd slot 272). The gap is to allow a space for a 32 * hypervisor to fit. Choosing 16 slots here is arbitrary, but it's 33 * what Xen requires. 34 */ 35 #define __PAGE_OFFSET _AC(0xffff880000000000, UL) 36 37 #define __PHYSICAL_START CONFIG_PHYSICAL_START 38 #define __KERNEL_ALIGN 0x200000 39 40 /* 41 * Make sure kernel is aligned to 2MB address. Catching it at compile 42 * time is better. Change your config file and compile the kernel 43 * for a 2MB aligned address (CONFIG_PHYSICAL_START) 44 */ 45 #if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0 46 #error "CONFIG_PHYSICAL_START must be a multiple of 2MB" 47 #endif 48 49 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) 50 #define __START_KERNEL_map _AC(0xffffffff80000000, UL) 51 52 /* See Documentation/x86_64/mm.txt for a description of the memory map. */ 53 #define __PHYSICAL_MASK_SHIFT 46 54 #define __VIRTUAL_MASK_SHIFT 48 55 56 /* 57 * Kernel image size is limited to 512 MB (see level2_kernel_pgt in 58 * arch/x86/kernel/head_64.S), and it is mapped here: 59 */ 60 #define KERNEL_IMAGE_SIZE (512 * 1024 * 1024) 61 #define KERNEL_IMAGE_START _AC(0xffffffff80000000, UL) 62 63 #ifndef __ASSEMBLY__ 64 void clear_page(void *page); 65 void copy_page(void *to, void *from); 66 67 /* duplicated to the one in bootmem.h */ 68 extern unsigned long max_pfn; 69 extern unsigned long phys_base; 70 71 extern unsigned long __phys_addr(unsigned long); 72 #define __phys_reloc_hide(x) (x) 73 74 /* 75 * These are used to make use of C type-checking.. 76 */ 77 typedef unsigned long pteval_t; 78 typedef unsigned long pmdval_t; 79 typedef unsigned long pudval_t; 80 typedef unsigned long pgdval_t; 81 typedef unsigned long pgprotval_t; 82 83 typedef struct page *pgtable_t; 84 85 typedef struct { pteval_t pte; } pte_t; 86 87 #define vmemmap ((struct page *)VMEMMAP_START) 88 89 extern unsigned long init_memory_mapping(unsigned long start, 90 unsigned long end); 91 92 extern void initmem_init(unsigned long start_pfn, unsigned long end_pfn); 93 extern void free_initmem(void); 94 95 extern void init_extra_mapping_uc(unsigned long phys, unsigned long size); 96 extern void init_extra_mapping_wb(unsigned long phys, unsigned long size); 97 98 #endif /* !__ASSEMBLY__ */ 99 100 #ifdef CONFIG_FLATMEM 101 #define pfn_valid(pfn) ((pfn) < max_pfn) 102 #endif 103 104 105 #endif /* _ASM_X86_PAGE_64_H */ 106