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1da177e4 LT |
1 | #ifndef _X86_64_PAGE_H |
2 | #define _X86_64_PAGE_H | |
3 | ||
4 | #include <linux/config.h> | |
5 | ||
6 | /* PAGE_SHIFT determines the page size */ | |
7 | #define PAGE_SHIFT 12 | |
8 | #ifdef __ASSEMBLY__ | |
9 | #define PAGE_SIZE (0x1 << PAGE_SHIFT) | |
10 | #else | |
11 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
12 | #endif | |
13 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
6b75aeed | 14 | #define PHYSICAL_PAGE_MASK (~(PAGE_SIZE-1) & __PHYSICAL_MASK) |
1da177e4 LT |
15 | |
16 | #define THREAD_ORDER 1 | |
b556b35e | 17 | #define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER) |
1da177e4 LT |
18 | #define CURRENT_MASK (~(THREAD_SIZE-1)) |
19 | ||
b556b35e JB |
20 | #define EXCEPTION_STACK_ORDER 0 |
21 | #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER) | |
22 | ||
23 | #define DEBUG_STACK_ORDER EXCEPTION_STACK_ORDER | |
24 | #define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER) | |
25 | ||
26 | #define IRQSTACK_ORDER 2 | |
27 | #define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER) | |
28 | ||
5f8efbb9 AK |
29 | #define STACKFAULT_STACK 1 |
30 | #define DOUBLEFAULT_STACK 2 | |
31 | #define NMI_STACK 3 | |
32 | #define DEBUG_STACK 4 | |
33 | #define MCE_STACK 5 | |
34 | #define N_EXCEPTION_STACKS 5 /* hw limit: 7 */ | |
35 | ||
1da177e4 LT |
36 | #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1)) |
37 | #define LARGE_PAGE_SIZE (1UL << PMD_SHIFT) | |
38 | ||
39 | #define HPAGE_SHIFT PMD_SHIFT | |
40 | #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) | |
41 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
42 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
43 | ||
44 | #ifdef __KERNEL__ | |
45 | #ifndef __ASSEMBLY__ | |
46 | ||
b9aac10d AK |
47 | extern unsigned long end_pfn; |
48 | ||
1da177e4 LT |
49 | void clear_page(void *); |
50 | void copy_page(void *, void *); | |
51 | ||
52 | #define clear_user_page(page, vaddr, pg) clear_page(page) | |
53 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
54 | ||
55 | #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr) | |
56 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE | |
57 | /* | |
58 | * These are used to make use of C type-checking.. | |
59 | */ | |
60 | typedef struct { unsigned long pte; } pte_t; | |
61 | typedef struct { unsigned long pmd; } pmd_t; | |
62 | typedef struct { unsigned long pud; } pud_t; | |
63 | typedef struct { unsigned long pgd; } pgd_t; | |
64 | #define PTE_MASK PHYSICAL_PAGE_MASK | |
65 | ||
66 | typedef struct { unsigned long pgprot; } pgprot_t; | |
67 | ||
68 | #define pte_val(x) ((x).pte) | |
69 | #define pmd_val(x) ((x).pmd) | |
70 | #define pud_val(x) ((x).pud) | |
71 | #define pgd_val(x) ((x).pgd) | |
72 | #define pgprot_val(x) ((x).pgprot) | |
73 | ||
74 | #define __pte(x) ((pte_t) { (x) } ) | |
75 | #define __pmd(x) ((pmd_t) { (x) } ) | |
76 | #define __pud(x) ((pud_t) { (x) } ) | |
77 | #define __pgd(x) ((pgd_t) { (x) } ) | |
78 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
79 | ||
d0537508 EB |
80 | #define __PHYSICAL_START ((unsigned long)CONFIG_PHYSICAL_START) |
81 | #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) | |
1da177e4 LT |
82 | #define __START_KERNEL_map 0xffffffff80000000UL |
83 | #define __PAGE_OFFSET 0xffff810000000000UL | |
84 | ||
85 | #else | |
d0537508 EB |
86 | #define __PHYSICAL_START CONFIG_PHYSICAL_START |
87 | #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) | |
1da177e4 LT |
88 | #define __START_KERNEL_map 0xffffffff80000000 |
89 | #define __PAGE_OFFSET 0xffff810000000000 | |
90 | #endif /* !__ASSEMBLY__ */ | |
91 | ||
92 | /* to align the pointer to the (next) page boundary */ | |
93 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
94 | ||
95 | /* See Documentation/x86_64/mm.txt for a description of the memory map. */ | |
96 | #define __PHYSICAL_MASK_SHIFT 46 | |
97 | #define __PHYSICAL_MASK ((1UL << __PHYSICAL_MASK_SHIFT) - 1) | |
98 | #define __VIRTUAL_MASK_SHIFT 48 | |
99 | #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) | |
100 | ||
101 | #define KERNEL_TEXT_SIZE (40UL*1024*1024) | |
102 | #define KERNEL_TEXT_START 0xffffffff80000000UL | |
103 | ||
104 | #ifndef __ASSEMBLY__ | |
105 | ||
106 | #include <asm/bug.h> | |
107 | ||
1da177e4 LT |
108 | #endif /* __ASSEMBLY__ */ |
109 | ||
110 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) | |
111 | ||
112 | /* Note: __pa(&symbol_visible_to_c) should be always replaced with __pa_symbol. | |
113 | Otherwise you risk miscompilation. */ | |
114 | #define __pa(x) (((unsigned long)(x)>=__START_KERNEL_map)?(unsigned long)(x) - (unsigned long)__START_KERNEL_map:(unsigned long)(x) - PAGE_OFFSET) | |
115 | /* __pa_symbol should be used for C visible symbols. | |
116 | This seems to be the official gcc blessed way to do such arithmetic. */ | |
117 | #define __pa_symbol(x) \ | |
118 | ({unsigned long v; \ | |
119 | asm("" : "=r" (v) : "0" (x)); \ | |
120 | __pa(v); }) | |
121 | ||
122 | #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) | |
2b97690f MT |
123 | #define __boot_va(x) __va(x) |
124 | #define __boot_pa(x) __pa(x) | |
125 | #ifdef CONFIG_FLATMEM | |
1da177e4 LT |
126 | #define pfn_to_page(pfn) (mem_map + (pfn)) |
127 | #define page_to_pfn(page) ((unsigned long)((page) - mem_map)) | |
b9aac10d | 128 | #define pfn_valid(pfn) ((pfn) < end_pfn) |
1da177e4 LT |
129 | #endif |
130 | ||
131 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
132 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
133 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
134 | ||
135 | #define VM_DATA_DEFAULT_FLAGS \ | |
136 | (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ | |
137 | VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
138 | ||
139 | #define __HAVE_ARCH_GATE_AREA 1 | |
140 | ||
141 | #endif /* __KERNEL__ */ | |
142 | ||
fd4fd5aa SR |
143 | #include <asm-generic/page.h> |
144 | ||
1da177e4 | 145 | #endif /* _X86_64_PAGE_H */ |