1 #ifndef _ASM_X86_PGTABLE_DEFS_H
2 #define _ASM_X86_PGTABLE_DEFS_H
4 #include <linux/const.h>
6 #define FIRST_USER_ADDRESS 0
8 #define _PAGE_BIT_PRESENT 0 /* is present */
9 #define _PAGE_BIT_RW 1 /* writeable */
10 #define _PAGE_BIT_USER 2 /* userspace addressable */
11 #define _PAGE_BIT_PWT 3 /* page write through */
12 #define _PAGE_BIT_PCD 4 /* page cache disabled */
13 #define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */
14 #define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */
15 #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
16 #define _PAGE_BIT_PAT 7 /* on 4KB pages */
17 #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
18 #define _PAGE_BIT_UNUSED1 9 /* available for programmer */
19 #define _PAGE_BIT_IOMAP 10 /* flag used to indicate IO mapping */
20 #define _PAGE_BIT_UNUSED3 11
21 #define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */
22 #define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1
23 #define _PAGE_BIT_CPA_TEST _PAGE_BIT_UNUSED1
24 #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */
26 /* If _PAGE_BIT_PRESENT is clear, we use these: */
27 /* - if the user mapped it with PROT_NONE; pte_present gives true */
28 #define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL
29 /* - set: nonlinear file mapping, saved PTE; unset:swap */
30 #define _PAGE_BIT_FILE _PAGE_BIT_DIRTY
32 #define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
33 #define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW)
34 #define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER)
35 #define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT)
36 #define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD)
37 #define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED)
38 #define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY)
39 #define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
40 #define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
41 #define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1)
42 #define _PAGE_IOMAP (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP)
43 #define _PAGE_UNUSED3 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED3)
44 #define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
45 #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
46 #define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
47 #define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST)
48 #define __HAVE_ARCH_PTE_SPECIAL
50 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
51 #define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX)
53 #define _PAGE_NX (_AT(pteval_t, 0))
56 #define _PAGE_FILE (_AT(pteval_t, 1) << _PAGE_BIT_FILE)
57 #define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)
59 #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
60 _PAGE_ACCESSED | _PAGE_DIRTY)
61 #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \
64 /* Set of bits not changed in pte_modify */
65 #define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \
66 _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY)
68 #define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT)
69 #define _PAGE_CACHE_WB (0)
70 #define _PAGE_CACHE_WC (_PAGE_PWT)
71 #define _PAGE_CACHE_UC_MINUS (_PAGE_PCD)
72 #define _PAGE_CACHE_UC (_PAGE_PCD | _PAGE_PWT)
74 #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
75 #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
76 _PAGE_ACCESSED | _PAGE_NX)
78 #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \
79 _PAGE_USER | _PAGE_ACCESSED)
80 #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
81 _PAGE_ACCESSED | _PAGE_NX)
82 #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
84 #define PAGE_COPY PAGE_COPY_NOEXEC
85 #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \
86 _PAGE_ACCESSED | _PAGE_NX)
87 #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
90 #define __PAGE_KERNEL_EXEC \
91 (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL)
92 #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX)
94 #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
95 #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
96 #define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT)
97 #define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC)
98 #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT)
99 #define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD)
100 #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER)
101 #define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT)
102 #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE)
103 #define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE)
104 #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
106 #define __PAGE_KERNEL_IO (__PAGE_KERNEL | _PAGE_IOMAP)
107 #define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP)
108 #define __PAGE_KERNEL_IO_UC_MINUS (__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP)
109 #define __PAGE_KERNEL_IO_WC (__PAGE_KERNEL_WC | _PAGE_IOMAP)
111 #define PAGE_KERNEL __pgprot(__PAGE_KERNEL)
112 #define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO)
113 #define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
114 #define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX)
115 #define PAGE_KERNEL_WC __pgprot(__PAGE_KERNEL_WC)
116 #define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE)
117 #define PAGE_KERNEL_UC_MINUS __pgprot(__PAGE_KERNEL_UC_MINUS)
118 #define PAGE_KERNEL_EXEC_NOCACHE __pgprot(__PAGE_KERNEL_EXEC_NOCACHE)
119 #define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE)
120 #define PAGE_KERNEL_LARGE_NOCACHE __pgprot(__PAGE_KERNEL_LARGE_NOCACHE)
121 #define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC)
122 #define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL)
123 #define PAGE_KERNEL_VSYSCALL_NOCACHE __pgprot(__PAGE_KERNEL_VSYSCALL_NOCACHE)
125 #define PAGE_KERNEL_IO __pgprot(__PAGE_KERNEL_IO)
126 #define PAGE_KERNEL_IO_NOCACHE __pgprot(__PAGE_KERNEL_IO_NOCACHE)
127 #define PAGE_KERNEL_IO_UC_MINUS __pgprot(__PAGE_KERNEL_IO_UC_MINUS)
128 #define PAGE_KERNEL_IO_WC __pgprot(__PAGE_KERNEL_IO_WC)
131 #define __P000 PAGE_NONE
132 #define __P001 PAGE_READONLY
133 #define __P010 PAGE_COPY
134 #define __P011 PAGE_COPY
135 #define __P100 PAGE_READONLY_EXEC
136 #define __P101 PAGE_READONLY_EXEC
137 #define __P110 PAGE_COPY_EXEC
138 #define __P111 PAGE_COPY_EXEC
140 #define __S000 PAGE_NONE
141 #define __S001 PAGE_READONLY
142 #define __S010 PAGE_SHARED
143 #define __S011 PAGE_SHARED
144 #define __S100 PAGE_READONLY_EXEC
145 #define __S101 PAGE_READONLY_EXEC
146 #define __S110 PAGE_SHARED_EXEC
147 #define __S111 PAGE_SHARED_EXEC
150 * early identity mapping pte attrib macros.
153 #define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC
156 * For PDE_IDENT_ATTR include USER bit. As the PDE and PTE protection
157 * bits are combined, this will alow user to access the high address mapped
158 * VDSO in the presence of CONFIG_COMPAT_VDSO
160 #define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */
161 #define PDE_IDENT_ATTR 0x067 /* PRESENT+RW+USER+DIRTY+ACCESSED */
162 #define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */
167 extern pteval_t __supported_pte_mask;
169 #define pgprot_writecombine pgprot_writecombine
170 extern pgprot_t pgprot_writecombine(pgprot_t prot);
172 /* Indicate that x86 has its own track and untrack pfn vma functions */
173 #define __HAVE_PFNMAP_TRACKING
175 #define __HAVE_PHYS_MEM_ACCESS_PROT
177 pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
178 unsigned long size, pgprot_t vma_prot);
179 int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
180 unsigned long size, pgprot_t *vma_prot);
182 /* Install a pte for a particular vaddr in kernel space. */
183 void set_pte_vaddr(unsigned long vaddr, pte_t pte);
186 extern void native_pagetable_setup_start(pgd_t *base);
187 extern void native_pagetable_setup_done(pgd_t *base);
189 static inline void native_pagetable_setup_start(pgd_t *base) {}
190 static inline void native_pagetable_setup_done(pgd_t *base) {}
194 extern void arch_report_meminfo(struct seq_file *m);
204 #ifdef CONFIG_PROC_FS
205 extern void update_page_count(int level, unsigned long pages);
207 static inline void update_page_count(int level, unsigned long pages) { }
211 * Helper function that returns the kernel pagetable entry controlling
212 * the virtual address 'address'. NULL means no pagetable entry present.
213 * NOTE: the return type is pte_t but if the pmd is PSE then we return it
216 extern pte_t *lookup_address(unsigned long address, unsigned int *level);
218 #endif /* !__ASSEMBLY__ */
221 # include "pgtable_32_types.h"
223 # include "pgtable_64_types.h"
226 #endif /* _ASM_X86_PGTABLE_DEFS_H */