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1 | #ifndef _ASM_X86_PAGE_H |
2 | #define _ASM_X86_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 | ||
11 | #define PHYSICAL_PAGE_MASK (PAGE_MASK & __PHYSICAL_MASK) | |
12 | ||
13 | #define LARGE_PAGE_SIZE (_AC(1,UL) << PMD_SHIFT) | |
14 | #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1)) | |
15 | ||
16 | #define HPAGE_SHIFT PMD_SHIFT | |
17 | #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) | |
18 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
19 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
20 | ||
21 | /* to align the pointer to the (next) page boundary */ | |
22 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
23 | ||
24 | #define __PHYSICAL_MASK ((_AC(1,UL) << __PHYSICAL_MASK_SHIFT) - 1) | |
25 | #define __VIRTUAL_MASK ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - 1) | |
26 | ||
27 | ||
28 | #ifdef CONFIG_X86_64 | |
29 | #define THREAD_ORDER 1 | |
30 | #define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER) | |
31 | #define CURRENT_MASK (~(THREAD_SIZE-1)) | |
32 | ||
33 | #define EXCEPTION_STACK_ORDER 0 | |
34 | #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER) | |
35 | ||
36 | #define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1) | |
37 | #define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER) | |
38 | ||
39 | #define IRQSTACK_ORDER 2 | |
40 | #define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER) | |
41 | ||
42 | #define STACKFAULT_STACK 1 | |
43 | #define DOUBLEFAULT_STACK 2 | |
44 | #define NMI_STACK 3 | |
45 | #define DEBUG_STACK 4 | |
46 | #define MCE_STACK 5 | |
47 | #define N_EXCEPTION_STACKS 5 /* hw limit: 7 */ | |
48 | ||
49 | #define __PAGE_OFFSET _AC(0xffff810000000000, UL) | |
50 | ||
51 | #define __PHYSICAL_START CONFIG_PHYSICAL_START | |
52 | #define __KERNEL_ALIGN 0x200000 | |
53 | ||
54 | /* | |
55 | * Make sure kernel is aligned to 2MB address. Catching it at compile | |
56 | * time is better. Change your config file and compile the kernel | |
57 | * for a 2MB aligned address (CONFIG_PHYSICAL_START) | |
58 | */ | |
59 | #if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0 | |
60 | #error "CONFIG_PHYSICAL_START must be a multiple of 2MB" | |
61 | #endif | |
62 | ||
63 | #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) | |
64 | #define __START_KERNEL_map _AC(0xffffffff80000000, UL) | |
65 | ||
66 | /* See Documentation/x86_64/mm.txt for a description of the memory map. */ | |
67 | #define __PHYSICAL_MASK_SHIFT 46 | |
68 | #define __VIRTUAL_MASK_SHIFT 48 | |
69 | ||
70 | #define KERNEL_TEXT_SIZE (40*1024*1024) | |
71 | #define KERNEL_TEXT_START _AC(0xffffffff80000000, UL) | |
72 | ||
73 | #endif /* CONFIG_X86_64 */ | |
74 | ||
75 | #ifdef CONFIG_X86_32 | |
76 | ||
77 | /* | |
78 | * This handles the memory map. | |
79 | * | |
80 | * A __PAGE_OFFSET of 0xC0000000 means that the kernel has | |
81 | * a virtual address space of one gigabyte, which limits the | |
82 | * amount of physical memory you can use to about 950MB. | |
83 | * | |
84 | * If you want more physical memory than this then see the CONFIG_HIGHMEM4G | |
85 | * and CONFIG_HIGHMEM64G options in the kernel configuration. | |
86 | */ | |
87 | #define __PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL) | |
88 | ||
89 | #ifdef CONFIG_X86_PAE | |
90 | #define __PHYSICAL_MASK_SHIFT 36 | |
91 | #define __VIRTUAL_MASK_SHIFT 32 | |
92 | #else /* !CONFIG_X86_PAE */ | |
93 | #define __PHYSICAL_MASK_SHIFT 32 | |
94 | #define __VIRTUAL_MASK_SHIFT 32 | |
95 | #endif /* CONFIG_X86_PAE */ | |
96 | ||
97 | #ifdef CONFIG_HUGETLB_PAGE | |
98 | #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA | |
99 | #endif | |
100 | ||
101 | #endif /* CONFIG_X86_32 */ | |
102 | ||
103 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) | |
104 | ||
105 | #define VM_DATA_DEFAULT_FLAGS \ | |
106 | (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ | |
107 | VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
108 | ||
109 | ||
110 | #ifdef CONFIG_X86_32 | |
111 | # include "page_32.h" | |
96a388de | 112 | #else |
83a5101b | 113 | # include "page_64.h" |
96a388de | 114 | #endif |
83a5101b JF |
115 | |
116 | #endif /* _ASM_X86_PAGE_H */ |