Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas...
[linux-2.6.git] / arch / x86 / include / asm / pgtable_types.h
1 #ifndef _ASM_X86_PGTABLE_DEFS_H
2 #define _ASM_X86_PGTABLE_DEFS_H
3
4 #include <linux/const.h>
5 #include <asm/page_types.h>
6
7 #define FIRST_USER_ADDRESS      0
8
9 #define _PAGE_BIT_PRESENT       0       /* is present */
10 #define _PAGE_BIT_RW            1       /* writeable */
11 #define _PAGE_BIT_USER          2       /* userspace addressable */
12 #define _PAGE_BIT_PWT           3       /* page write through */
13 #define _PAGE_BIT_PCD           4       /* page cache disabled */
14 #define _PAGE_BIT_ACCESSED      5       /* was accessed (raised by CPU) */
15 #define _PAGE_BIT_DIRTY         6       /* was written to (raised by CPU) */
16 #define _PAGE_BIT_PSE           7       /* 4 MB (or 2MB) page */
17 #define _PAGE_BIT_PAT           7       /* on 4KB pages */
18 #define _PAGE_BIT_GLOBAL        8       /* Global TLB entry PPro+ */
19 #define _PAGE_BIT_UNUSED1       9       /* available for programmer */
20 #define _PAGE_BIT_IOMAP         10      /* flag used to indicate IO mapping */
21 #define _PAGE_BIT_HIDDEN        11      /* hidden by kmemcheck */
22 #define _PAGE_BIT_PAT_LARGE     12      /* On 2MB or 1GB pages */
23 #define _PAGE_BIT_SPECIAL       _PAGE_BIT_UNUSED1
24 #define _PAGE_BIT_CPA_TEST      _PAGE_BIT_UNUSED1
25 #define _PAGE_BIT_SPLITTING     _PAGE_BIT_UNUSED1 /* only valid on a PSE pmd */
26 #define _PAGE_BIT_NX           63       /* No execute: only valid after cpuid check */
27
28 /* If _PAGE_BIT_PRESENT is clear, we use these: */
29 /* - if the user mapped it with PROT_NONE; pte_present gives true */
30 #define _PAGE_BIT_PROTNONE      _PAGE_BIT_GLOBAL
31 /* - set: nonlinear file mapping, saved PTE; unset:swap */
32 #define _PAGE_BIT_FILE          _PAGE_BIT_DIRTY
33
34 #define _PAGE_PRESENT   (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
35 #define _PAGE_RW        (_AT(pteval_t, 1) << _PAGE_BIT_RW)
36 #define _PAGE_USER      (_AT(pteval_t, 1) << _PAGE_BIT_USER)
37 #define _PAGE_PWT       (_AT(pteval_t, 1) << _PAGE_BIT_PWT)
38 #define _PAGE_PCD       (_AT(pteval_t, 1) << _PAGE_BIT_PCD)
39 #define _PAGE_ACCESSED  (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED)
40 #define _PAGE_DIRTY     (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY)
41 #define _PAGE_PSE       (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
42 #define _PAGE_GLOBAL    (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
43 #define _PAGE_UNUSED1   (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1)
44 #define _PAGE_IOMAP     (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP)
45 #define _PAGE_PAT       (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
46 #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
47 #define _PAGE_SPECIAL   (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
48 #define _PAGE_CPA_TEST  (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST)
49 #define _PAGE_SPLITTING (_AT(pteval_t, 1) << _PAGE_BIT_SPLITTING)
50 #define __HAVE_ARCH_PTE_SPECIAL
51
52 #ifdef CONFIG_KMEMCHECK
53 #define _PAGE_HIDDEN    (_AT(pteval_t, 1) << _PAGE_BIT_HIDDEN)
54 #else
55 #define _PAGE_HIDDEN    (_AT(pteval_t, 0))
56 #endif
57
58 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
59 #define _PAGE_NX        (_AT(pteval_t, 1) << _PAGE_BIT_NX)
60 #else
61 #define _PAGE_NX        (_AT(pteval_t, 0))
62 #endif
63
64 #define _PAGE_FILE      (_AT(pteval_t, 1) << _PAGE_BIT_FILE)
65 #define _PAGE_PROTNONE  (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)
66
67 #define _PAGE_TABLE     (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |        \
68                          _PAGE_ACCESSED | _PAGE_DIRTY)
69 #define _KERNPG_TABLE   (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED |    \
70                          _PAGE_DIRTY)
71
72 /* Set of bits not changed in pte_modify */
73 #define _PAGE_CHG_MASK  (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT |         \
74                          _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY)
75 #define _HPAGE_CHG_MASK (_PAGE_CHG_MASK | _PAGE_PSE)
76
77 #define _PAGE_CACHE_MASK        (_PAGE_PCD | _PAGE_PWT)
78 #define _PAGE_CACHE_WB          (0)
79 #define _PAGE_CACHE_WC          (_PAGE_PWT)
80 #define _PAGE_CACHE_UC_MINUS    (_PAGE_PCD)
81 #define _PAGE_CACHE_UC          (_PAGE_PCD | _PAGE_PWT)
82
83 #define PAGE_NONE       __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
84 #define PAGE_SHARED     __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
85                                  _PAGE_ACCESSED | _PAGE_NX)
86
87 #define PAGE_SHARED_EXEC        __pgprot(_PAGE_PRESENT | _PAGE_RW |     \
88                                          _PAGE_USER | _PAGE_ACCESSED)
89 #define PAGE_COPY_NOEXEC        __pgprot(_PAGE_PRESENT | _PAGE_USER |   \
90                                          _PAGE_ACCESSED | _PAGE_NX)
91 #define PAGE_COPY_EXEC          __pgprot(_PAGE_PRESENT | _PAGE_USER |   \
92                                          _PAGE_ACCESSED)
93 #define PAGE_COPY               PAGE_COPY_NOEXEC
94 #define PAGE_READONLY           __pgprot(_PAGE_PRESENT | _PAGE_USER |   \
95                                          _PAGE_ACCESSED | _PAGE_NX)
96 #define PAGE_READONLY_EXEC      __pgprot(_PAGE_PRESENT | _PAGE_USER |   \
97                                          _PAGE_ACCESSED)
98
99 #define __PAGE_KERNEL_EXEC                                              \
100         (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL)
101 #define __PAGE_KERNEL           (__PAGE_KERNEL_EXEC | _PAGE_NX)
102
103 #define __PAGE_KERNEL_RO                (__PAGE_KERNEL & ~_PAGE_RW)
104 #define __PAGE_KERNEL_RX                (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
105 #define __PAGE_KERNEL_EXEC_NOCACHE      (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT)
106 #define __PAGE_KERNEL_WC                (__PAGE_KERNEL | _PAGE_CACHE_WC)
107 #define __PAGE_KERNEL_NOCACHE           (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT)
108 #define __PAGE_KERNEL_UC_MINUS          (__PAGE_KERNEL | _PAGE_PCD)
109 #define __PAGE_KERNEL_VSYSCALL          (__PAGE_KERNEL_RX | _PAGE_USER)
110 #define __PAGE_KERNEL_VSYSCALL_NOCACHE  (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT)
111 #define __PAGE_KERNEL_LARGE             (__PAGE_KERNEL | _PAGE_PSE)
112 #define __PAGE_KERNEL_LARGE_NOCACHE     (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE)
113 #define __PAGE_KERNEL_LARGE_EXEC        (__PAGE_KERNEL_EXEC | _PAGE_PSE)
114
115 #define __PAGE_KERNEL_IO                (__PAGE_KERNEL | _PAGE_IOMAP)
116 #define __PAGE_KERNEL_IO_NOCACHE        (__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP)
117 #define __PAGE_KERNEL_IO_UC_MINUS       (__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP)
118 #define __PAGE_KERNEL_IO_WC             (__PAGE_KERNEL_WC | _PAGE_IOMAP)
119
120 #define PAGE_KERNEL                     __pgprot(__PAGE_KERNEL)
121 #define PAGE_KERNEL_RO                  __pgprot(__PAGE_KERNEL_RO)
122 #define PAGE_KERNEL_EXEC                __pgprot(__PAGE_KERNEL_EXEC)
123 #define PAGE_KERNEL_RX                  __pgprot(__PAGE_KERNEL_RX)
124 #define PAGE_KERNEL_WC                  __pgprot(__PAGE_KERNEL_WC)
125 #define PAGE_KERNEL_NOCACHE             __pgprot(__PAGE_KERNEL_NOCACHE)
126 #define PAGE_KERNEL_UC_MINUS            __pgprot(__PAGE_KERNEL_UC_MINUS)
127 #define PAGE_KERNEL_EXEC_NOCACHE        __pgprot(__PAGE_KERNEL_EXEC_NOCACHE)
128 #define PAGE_KERNEL_LARGE               __pgprot(__PAGE_KERNEL_LARGE)
129 #define PAGE_KERNEL_LARGE_NOCACHE       __pgprot(__PAGE_KERNEL_LARGE_NOCACHE)
130 #define PAGE_KERNEL_LARGE_EXEC          __pgprot(__PAGE_KERNEL_LARGE_EXEC)
131 #define PAGE_KERNEL_VSYSCALL            __pgprot(__PAGE_KERNEL_VSYSCALL)
132 #define PAGE_KERNEL_VSYSCALL_NOCACHE    __pgprot(__PAGE_KERNEL_VSYSCALL_NOCACHE)
133
134 #define PAGE_KERNEL_IO                  __pgprot(__PAGE_KERNEL_IO)
135 #define PAGE_KERNEL_IO_NOCACHE          __pgprot(__PAGE_KERNEL_IO_NOCACHE)
136 #define PAGE_KERNEL_IO_UC_MINUS         __pgprot(__PAGE_KERNEL_IO_UC_MINUS)
137 #define PAGE_KERNEL_IO_WC               __pgprot(__PAGE_KERNEL_IO_WC)
138
139 /*         xwr */
140 #define __P000  PAGE_NONE
141 #define __P001  PAGE_READONLY
142 #define __P010  PAGE_COPY
143 #define __P011  PAGE_COPY
144 #define __P100  PAGE_READONLY_EXEC
145 #define __P101  PAGE_READONLY_EXEC
146 #define __P110  PAGE_COPY_EXEC
147 #define __P111  PAGE_COPY_EXEC
148
149 #define __S000  PAGE_NONE
150 #define __S001  PAGE_READONLY
151 #define __S010  PAGE_SHARED
152 #define __S011  PAGE_SHARED
153 #define __S100  PAGE_READONLY_EXEC
154 #define __S101  PAGE_READONLY_EXEC
155 #define __S110  PAGE_SHARED_EXEC
156 #define __S111  PAGE_SHARED_EXEC
157
158 /*
159  * early identity mapping  pte attrib macros.
160  */
161 #ifdef CONFIG_X86_64
162 #define __PAGE_KERNEL_IDENT_LARGE_EXEC  __PAGE_KERNEL_LARGE_EXEC
163 #else
164 /*
165  * For PDE_IDENT_ATTR include USER bit. As the PDE and PTE protection
166  * bits are combined, this will alow user to access the high address mapped
167  * VDSO in the presence of CONFIG_COMPAT_VDSO
168  */
169 #define PTE_IDENT_ATTR   0x003          /* PRESENT+RW */
170 #define PDE_IDENT_ATTR   0x067          /* PRESENT+RW+USER+DIRTY+ACCESSED */
171 #define PGD_IDENT_ATTR   0x001          /* PRESENT (no other attributes) */
172 #endif
173
174 #ifdef CONFIG_X86_32
175 # include "pgtable_32_types.h"
176 #else
177 # include "pgtable_64_types.h"
178 #endif
179
180 #ifndef __ASSEMBLY__
181
182 #include <linux/types.h>
183
184 /* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */
185 #define PTE_PFN_MASK            ((pteval_t)PHYSICAL_PAGE_MASK)
186
187 /* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */
188 #define PTE_FLAGS_MASK          (~PTE_PFN_MASK)
189
190 typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
191
192 typedef struct { pgdval_t pgd; } pgd_t;
193
194 static inline pgd_t native_make_pgd(pgdval_t val)
195 {
196         return (pgd_t) { val };
197 }
198
199 static inline pgdval_t native_pgd_val(pgd_t pgd)
200 {
201         return pgd.pgd;
202 }
203
204 static inline pgdval_t pgd_flags(pgd_t pgd)
205 {
206         return native_pgd_val(pgd) & PTE_FLAGS_MASK;
207 }
208
209 #if PAGETABLE_LEVELS > 3
210 typedef struct { pudval_t pud; } pud_t;
211
212 static inline pud_t native_make_pud(pmdval_t val)
213 {
214         return (pud_t) { val };
215 }
216
217 static inline pudval_t native_pud_val(pud_t pud)
218 {
219         return pud.pud;
220 }
221 #else
222 #include <asm-generic/pgtable-nopud.h>
223
224 static inline pudval_t native_pud_val(pud_t pud)
225 {
226         return native_pgd_val(pud.pgd);
227 }
228 #endif
229
230 #if PAGETABLE_LEVELS > 2
231 typedef struct { pmdval_t pmd; } pmd_t;
232
233 static inline pmd_t native_make_pmd(pmdval_t val)
234 {
235         return (pmd_t) { val };
236 }
237
238 static inline pmdval_t native_pmd_val(pmd_t pmd)
239 {
240         return pmd.pmd;
241 }
242 #else
243 #include <asm-generic/pgtable-nopmd.h>
244
245 static inline pmdval_t native_pmd_val(pmd_t pmd)
246 {
247         return native_pgd_val(pmd.pud.pgd);
248 }
249 #endif
250
251 static inline pudval_t pud_flags(pud_t pud)
252 {
253         return native_pud_val(pud) & PTE_FLAGS_MASK;
254 }
255
256 static inline pmdval_t pmd_flags(pmd_t pmd)
257 {
258         return native_pmd_val(pmd) & PTE_FLAGS_MASK;
259 }
260
261 static inline pte_t native_make_pte(pteval_t val)
262 {
263         return (pte_t) { .pte = val };
264 }
265
266 static inline pteval_t native_pte_val(pte_t pte)
267 {
268         return pte.pte;
269 }
270
271 static inline pteval_t pte_flags(pte_t pte)
272 {
273         return native_pte_val(pte) & PTE_FLAGS_MASK;
274 }
275
276 #define pgprot_val(x)   ((x).pgprot)
277 #define __pgprot(x)     ((pgprot_t) { (x) } )
278
279
280 typedef struct page *pgtable_t;
281
282 extern pteval_t __supported_pte_mask;
283 extern void set_nx(void);
284 extern int nx_enabled;
285
286 #define pgprot_writecombine     pgprot_writecombine
287 extern pgprot_t pgprot_writecombine(pgprot_t prot);
288
289 /* Indicate that x86 has its own track and untrack pfn vma functions */
290 #define __HAVE_PFNMAP_TRACKING
291
292 #define __HAVE_PHYS_MEM_ACCESS_PROT
293 struct file;
294 pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
295                               unsigned long size, pgprot_t vma_prot);
296 int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
297                               unsigned long size, pgprot_t *vma_prot);
298
299 /* Install a pte for a particular vaddr in kernel space. */
300 void set_pte_vaddr(unsigned long vaddr, pte_t pte);
301
302 extern void native_pagetable_reserve(u64 start, u64 end);
303 #ifdef CONFIG_X86_32
304 extern void native_pagetable_setup_start(pgd_t *base);
305 extern void native_pagetable_setup_done(pgd_t *base);
306 #else
307 #define native_pagetable_setup_start x86_init_pgd_noop
308 #define native_pagetable_setup_done  x86_init_pgd_noop
309 #endif
310
311 struct seq_file;
312 extern void arch_report_meminfo(struct seq_file *m);
313
314 enum {
315         PG_LEVEL_NONE,
316         PG_LEVEL_4K,
317         PG_LEVEL_2M,
318         PG_LEVEL_1G,
319         PG_LEVEL_NUM
320 };
321
322 #ifdef CONFIG_PROC_FS
323 extern void update_page_count(int level, unsigned long pages);
324 #else
325 static inline void update_page_count(int level, unsigned long pages) { }
326 #endif
327
328 /*
329  * Helper function that returns the kernel pagetable entry controlling
330  * the virtual address 'address'. NULL means no pagetable entry present.
331  * NOTE: the return type is pte_t but if the pmd is PSE then we return it
332  * as a pte too.
333  */
334 extern pte_t *lookup_address(unsigned long address, unsigned int *level);
335
336 #endif  /* !__ASSEMBLY__ */
337
338 #endif /* _ASM_X86_PGTABLE_DEFS_H */