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