x86: move all asm/pgtable constants into one place
[linux-2.6.git] / include / asm-x86 / pgtable.h
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
22 #define _PAGE_PRESENT   (_AC(1, UL)<<_PAGE_BIT_PRESENT)
23 #define _PAGE_RW        (_AC(1, UL)<<_PAGE_BIT_RW)
24 #define _PAGE_USER      (_AC(1, UL)<<_PAGE_BIT_USER)
25 #define _PAGE_PWT       (_AC(1, UL)<<_PAGE_BIT_PWT)
26 #define _PAGE_PCD       (_AC(1, UL)<<_PAGE_BIT_PCD)
27 #define _PAGE_ACCESSED  (_AC(1, UL)<<_PAGE_BIT_ACCESSED)
28 #define _PAGE_DIRTY     (_AC(1, UL)<<_PAGE_BIT_DIRTY)
29 #define _PAGE_PSE       (_AC(1, UL)<<_PAGE_BIT_PSE)     /* 2MB page */
30 #define _PAGE_GLOBAL    (_AC(1, UL)<<_PAGE_BIT_GLOBAL)  /* Global TLB entry */
31 #define _PAGE_UNUSED1   (_AC(1, UL)<<_PAGE_BIT_UNUSED1)
32 #define _PAGE_UNUSED2   (_AC(1, UL)<<_PAGE_BIT_UNUSED2)
33 #define _PAGE_UNUSED3   (_AC(1, UL)<<_PAGE_BIT_UNUSED3)
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
118 #ifdef CONFIG_X86_32
119 # include "pgtable_32.h"
120 #else
121 # include "pgtable_64.h"
122 #endif
123
124 #endif  /* _ASM_X86_PGTABLE_H */