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6c386655 JF |
1 | #ifndef _ASM_X86_PGTABLE_H |
2 | #define _ASM_X86_PGTABLE_H | |
3 | ||
4 | #define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1) | |
5 | #define FIRST_USER_ADDRESS 0 | |
6 | ||
7 | #define _PAGE_BIT_PRESENT 0 | |
8 | #define _PAGE_BIT_RW 1 | |
9 | #define _PAGE_BIT_USER 2 | |
10 | #define _PAGE_BIT_PWT 3 | |
11 | #define _PAGE_BIT_PCD 4 | |
12 | #define _PAGE_BIT_ACCESSED 5 | |
13 | #define _PAGE_BIT_DIRTY 6 | |
14 | #define _PAGE_BIT_FILE 6 | |
15 | #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */ | |
16 | #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */ | |
17 | #define _PAGE_BIT_UNUSED1 9 /* available for programmer */ | |
18 | #define _PAGE_BIT_UNUSED2 10 | |
19 | #define _PAGE_BIT_UNUSED3 11 | |
20 | #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */ | |
21 | ||
61f38226 IM |
22 | #define _PAGE_PRESENT (_AC(1, L)<<_PAGE_BIT_PRESENT) |
23 | #define _PAGE_RW (_AC(1, L)<<_PAGE_BIT_RW) | |
24 | #define _PAGE_USER (_AC(1, L)<<_PAGE_BIT_USER) | |
25 | #define _PAGE_PWT (_AC(1, L)<<_PAGE_BIT_PWT) | |
26 | #define _PAGE_PCD (_AC(1, L)<<_PAGE_BIT_PCD) | |
27 | #define _PAGE_ACCESSED (_AC(1, L)<<_PAGE_BIT_ACCESSED) | |
28 | #define _PAGE_DIRTY (_AC(1, L)<<_PAGE_BIT_DIRTY) | |
29 | #define _PAGE_PSE (_AC(1, L)<<_PAGE_BIT_PSE) /* 2MB page */ | |
30 | #define _PAGE_GLOBAL (_AC(1, L)<<_PAGE_BIT_GLOBAL) /* Global TLB entry */ | |
31 | #define _PAGE_UNUSED1 (_AC(1, L)<<_PAGE_BIT_UNUSED1) | |
32 | #define _PAGE_UNUSED2 (_AC(1, L)<<_PAGE_BIT_UNUSED2) | |
33 | #define _PAGE_UNUSED3 (_AC(1, L)<<_PAGE_BIT_UNUSED3) | |
6c386655 JF |
34 | |
35 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) | |
36 | #define _PAGE_NX (_AC(1, ULL) << _PAGE_BIT_NX) | |
37 | #else | |
38 | #define _PAGE_NX 0 | |
39 | #endif | |
40 | ||
41 | /* If _PAGE_PRESENT is clear, we use these: */ | |
42 | #define _PAGE_FILE _PAGE_DIRTY /* nonlinear file mapping, saved PTE; unset:swap */ | |
43 | #define _PAGE_PROTNONE _PAGE_PSE /* if the user mapped it with PROT_NONE; | |
44 | pte_present gives true */ | |
45 | ||
46 | #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY) | |
47 | #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY) | |
48 | ||
49 | #define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY) | |
50 | ||
51 | #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) | |
52 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) | |
53 | ||
54 | #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED) | |
55 | #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) | |
56 | #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) | |
57 | #define PAGE_COPY PAGE_COPY_NOEXEC | |
58 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) | |
59 | #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) | |
60 | ||
61 | #ifdef CONFIG_X86_32 | |
62 | #define _PAGE_KERNEL_EXEC \ | |
63 | (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) | |
64 | #define _PAGE_KERNEL (_PAGE_KERNEL_EXEC | _PAGE_NX) | |
65 | ||
66 | #ifndef __ASSEMBLY__ | |
67 | extern unsigned long long __PAGE_KERNEL, __PAGE_KERNEL_EXEC; | |
68 | #endif /* __ASSEMBLY__ */ | |
69 | #else | |
70 | #define __PAGE_KERNEL_EXEC \ | |
71 | (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) | |
72 | #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX) | |
73 | #endif | |
74 | ||
75 | #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW) | |
76 | #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW) | |
77 | #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT) | |
78 | #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER) | |
79 | #define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT) | |
80 | #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE) | |
81 | #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE) | |
82 | ||
83 | #ifdef CONFIG_X86_32 | |
84 | # define MAKE_GLOBAL(x) __pgprot((x)) | |
85 | #else | |
86 | # define MAKE_GLOBAL(x) __pgprot((x) | _PAGE_GLOBAL) | |
87 | #endif | |
88 | ||
89 | #define PAGE_KERNEL MAKE_GLOBAL(__PAGE_KERNEL) | |
90 | #define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO) | |
91 | #define PAGE_KERNEL_EXEC MAKE_GLOBAL(__PAGE_KERNEL_EXEC) | |
92 | #define PAGE_KERNEL_RX MAKE_GLOBAL(__PAGE_KERNEL_RX) | |
93 | #define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE) | |
94 | #define PAGE_KERNEL_LARGE MAKE_GLOBAL(__PAGE_KERNEL_LARGE) | |
95 | #define PAGE_KERNEL_LARGE_EXEC MAKE_GLOBAL(__PAGE_KERNEL_LARGE_EXEC) | |
96 | #define PAGE_KERNEL_VSYSCALL MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL) | |
97 | #define PAGE_KERNEL_VSYSCALL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL_NOCACHE) | |
98 | ||
99 | /* xwr */ | |
100 | #define __P000 PAGE_NONE | |
101 | #define __P001 PAGE_READONLY | |
102 | #define __P010 PAGE_COPY | |
103 | #define __P011 PAGE_COPY | |
104 | #define __P100 PAGE_READONLY_EXEC | |
105 | #define __P101 PAGE_READONLY_EXEC | |
106 | #define __P110 PAGE_COPY_EXEC | |
107 | #define __P111 PAGE_COPY_EXEC | |
108 | ||
109 | #define __S000 PAGE_NONE | |
110 | #define __S001 PAGE_READONLY | |
111 | #define __S010 PAGE_SHARED | |
112 | #define __S011 PAGE_SHARED | |
113 | #define __S100 PAGE_READONLY_EXEC | |
114 | #define __S101 PAGE_READONLY_EXEC | |
115 | #define __S110 PAGE_SHARED_EXEC | |
116 | #define __S111 PAGE_SHARED_EXEC | |
117 | ||
4614139c JF |
118 | #ifndef __ASSEMBLY__ |
119 | /* | |
120 | * The following only work if pte_present() is true. | |
121 | * Undefined behaviour if not.. | |
122 | */ | |
123 | static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; } | |
124 | static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } | |
125 | static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; } | |
126 | static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; } | |
127 | static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_PSE; } | |
128 | ||
129 | static inline int pmd_large(pmd_t pte) { | |
130 | return (pmd_val(pte) & (_PAGE_PSE|_PAGE_PRESENT)) == | |
131 | (_PAGE_PSE|_PAGE_PRESENT); | |
132 | } | |
133 | ||
134 | static inline pte_t pte_mkclean(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_DIRTY); } | |
135 | static inline pte_t pte_mkold(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_ACCESSED); } | |
136 | static inline pte_t pte_wrprotect(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_RW); } | |
137 | static inline pte_t pte_mkexec(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_NX); } | |
138 | static inline pte_t pte_mkdirty(pte_t pte) { return __pte(pte_val(pte) | _PAGE_DIRTY); } | |
139 | static inline pte_t pte_mkyoung(pte_t pte) { return __pte(pte_val(pte) | _PAGE_ACCESSED); } | |
140 | static inline pte_t pte_mkwrite(pte_t pte) { return __pte(pte_val(pte) | _PAGE_RW); } | |
141 | static inline pte_t pte_mkhuge(pte_t pte) { return __pte(pte_val(pte) | _PAGE_PSE); } | |
142 | static inline pte_t pte_clrhuge(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_PSE); } | |
143 | ||
144 | #endif /* __ASSEMBLY__ */ | |
145 | ||
96a388de TG |
146 | #ifdef CONFIG_X86_32 |
147 | # include "pgtable_32.h" | |
148 | #else | |
149 | # include "pgtable_64.h" | |
150 | #endif | |
6c386655 JF |
151 | |
152 | #endif /* _ASM_X86_PGTABLE_H */ |