cpu: convert 'cpu' and 'machinecheck' sysdev_class to a regular subsystem
[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_VVAR              (__PAGE_KERNEL_RO | _PAGE_USER)
111 #define __PAGE_KERNEL_VVAR_NOCACHE      (__PAGE_KERNEL_VVAR | _PAGE_PCD | _PAGE_PWT)
112 #define __PAGE_KERNEL_LARGE             (__PAGE_KERNEL | _PAGE_PSE)
113 #define __PAGE_KERNEL_LARGE_NOCACHE     (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE)
114 #define __PAGE_KERNEL_LARGE_EXEC        (__PAGE_KERNEL_EXEC | _PAGE_PSE)
115
116 #define __PAGE_KERNEL_IO                (__PAGE_KERNEL | _PAGE_IOMAP)
117 #define __PAGE_KERNEL_IO_NOCACHE        (__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP)
118 #define __PAGE_KERNEL_IO_UC_MINUS       (__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP)
119 #define __PAGE_KERNEL_IO_WC             (__PAGE_KERNEL_WC | _PAGE_IOMAP)
120
121 #define PAGE_KERNEL                     __pgprot(__PAGE_KERNEL)
122 #define PAGE_KERNEL_RO                  __pgprot(__PAGE_KERNEL_RO)
123 #define PAGE_KERNEL_EXEC                __pgprot(__PAGE_KERNEL_EXEC)
124 #define PAGE_KERNEL_RX                  __pgprot(__PAGE_KERNEL_RX)
125 #define PAGE_KERNEL_WC                  __pgprot(__PAGE_KERNEL_WC)
126 #define PAGE_KERNEL_NOCACHE             __pgprot(__PAGE_KERNEL_NOCACHE)
127 #define PAGE_KERNEL_UC_MINUS            __pgprot(__PAGE_KERNEL_UC_MINUS)
128 #define PAGE_KERNEL_EXEC_NOCACHE        __pgprot(__PAGE_KERNEL_EXEC_NOCACHE)
129 #define PAGE_KERNEL_LARGE               __pgprot(__PAGE_KERNEL_LARGE)
130 #define PAGE_KERNEL_LARGE_NOCACHE       __pgprot(__PAGE_KERNEL_LARGE_NOCACHE)
131 #define PAGE_KERNEL_LARGE_EXEC          __pgprot(__PAGE_KERNEL_LARGE_EXEC)
132 #define PAGE_KERNEL_VSYSCALL            __pgprot(__PAGE_KERNEL_VSYSCALL)
133 #define PAGE_KERNEL_VVAR                __pgprot(__PAGE_KERNEL_VVAR)
134 #define PAGE_KERNEL_VVAR_NOCACHE        __pgprot(__PAGE_KERNEL_VVAR_NOCACHE)
135
136 #define PAGE_KERNEL_IO                  __pgprot(__PAGE_KERNEL_IO)
137 #define PAGE_KERNEL_IO_NOCACHE          __pgprot(__PAGE_KERNEL_IO_NOCACHE)
138 #define PAGE_KERNEL_IO_UC_MINUS         __pgprot(__PAGE_KERNEL_IO_UC_MINUS)
139 #define PAGE_KERNEL_IO_WC               __pgprot(__PAGE_KERNEL_IO_WC)
140
141 /*         xwr */
142 #define __P000  PAGE_NONE
143 #define __P001  PAGE_READONLY
144 #define __P010  PAGE_COPY
145 #define __P011  PAGE_COPY
146 #define __P100  PAGE_READONLY_EXEC
147 #define __P101  PAGE_READONLY_EXEC
148 #define __P110  PAGE_COPY_EXEC
149 #define __P111  PAGE_COPY_EXEC
150
151 #define __S000  PAGE_NONE
152 #define __S001  PAGE_READONLY
153 #define __S010  PAGE_SHARED
154 #define __S011  PAGE_SHARED
155 #define __S100  PAGE_READONLY_EXEC
156 #define __S101  PAGE_READONLY_EXEC
157 #define __S110  PAGE_SHARED_EXEC
158 #define __S111  PAGE_SHARED_EXEC
159
160 /*
161  * early identity mapping  pte attrib macros.
162  */
163 #ifdef CONFIG_X86_64
164 #define __PAGE_KERNEL_IDENT_LARGE_EXEC  __PAGE_KERNEL_LARGE_EXEC
165 #else
166 /*
167  * For PDE_IDENT_ATTR include USER bit. As the PDE and PTE protection
168  * bits are combined, this will alow user to access the high address mapped
169  * VDSO in the presence of CONFIG_COMPAT_VDSO
170  */
171 #define PTE_IDENT_ATTR   0x003          /* PRESENT+RW */
172 #define PDE_IDENT_ATTR   0x067          /* PRESENT+RW+USER+DIRTY+ACCESSED */
173 #define PGD_IDENT_ATTR   0x001          /* PRESENT (no other attributes) */
174 #endif
175
176 #ifdef CONFIG_X86_32
177 # include "pgtable_32_types.h"
178 #else
179 # include "pgtable_64_types.h"
180 #endif
181
182 #ifndef __ASSEMBLY__
183
184 #include <linux/types.h>
185
186 /* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */
187 #define PTE_PFN_MASK            ((pteval_t)PHYSICAL_PAGE_MASK)
188
189 /* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */
190 #define PTE_FLAGS_MASK          (~PTE_PFN_MASK)
191
192 typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
193
194 typedef struct { pgdval_t pgd; } pgd_t;
195
196 static inline pgd_t native_make_pgd(pgdval_t val)
197 {
198         return (pgd_t) { val };
199 }
200
201 static inline pgdval_t native_pgd_val(pgd_t pgd)
202 {
203         return pgd.pgd;
204 }
205
206 static inline pgdval_t pgd_flags(pgd_t pgd)
207 {
208         return native_pgd_val(pgd) & PTE_FLAGS_MASK;
209 }
210
211 #if PAGETABLE_LEVELS > 3
212 typedef struct { pudval_t pud; } pud_t;
213
214 static inline pud_t native_make_pud(pmdval_t val)
215 {
216         return (pud_t) { val };
217 }
218
219 static inline pudval_t native_pud_val(pud_t pud)
220 {
221         return pud.pud;
222 }
223 #else
224 #include <asm-generic/pgtable-nopud.h>
225
226 static inline pudval_t native_pud_val(pud_t pud)
227 {
228         return native_pgd_val(pud.pgd);
229 }
230 #endif
231
232 #if PAGETABLE_LEVELS > 2
233 typedef struct { pmdval_t pmd; } pmd_t;
234
235 static inline pmd_t native_make_pmd(pmdval_t val)
236 {
237         return (pmd_t) { val };
238 }
239
240 static inline pmdval_t native_pmd_val(pmd_t pmd)
241 {
242         return pmd.pmd;
243 }
244 #else
245 #include <asm-generic/pgtable-nopmd.h>
246
247 static inline pmdval_t native_pmd_val(pmd_t pmd)
248 {
249         return native_pgd_val(pmd.pud.pgd);
250 }
251 #endif
252
253 static inline pudval_t pud_flags(pud_t pud)
254 {
255         return native_pud_val(pud) & PTE_FLAGS_MASK;
256 }
257
258 static inline pmdval_t pmd_flags(pmd_t pmd)
259 {
260         return native_pmd_val(pmd) & PTE_FLAGS_MASK;
261 }
262
263 static inline pte_t native_make_pte(pteval_t val)
264 {
265         return (pte_t) { .pte = val };
266 }
267
268 static inline pteval_t native_pte_val(pte_t pte)
269 {
270         return pte.pte;
271 }
272
273 static inline pteval_t pte_flags(pte_t pte)
274 {
275         return native_pte_val(pte) & PTE_FLAGS_MASK;
276 }
277
278 #define pgprot_val(x)   ((x).pgprot)
279 #define __pgprot(x)     ((pgprot_t) { (x) } )
280
281
282 typedef struct page *pgtable_t;
283
284 extern pteval_t __supported_pte_mask;
285 extern void set_nx(void);
286 extern int nx_enabled;
287
288 #define pgprot_writecombine     pgprot_writecombine
289 extern pgprot_t pgprot_writecombine(pgprot_t prot);
290
291 /* Indicate that x86 has its own track and untrack pfn vma functions */
292 #define __HAVE_PFNMAP_TRACKING
293
294 #define __HAVE_PHYS_MEM_ACCESS_PROT
295 struct file;
296 pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
297                               unsigned long size, pgprot_t vma_prot);
298 int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
299                               unsigned long size, pgprot_t *vma_prot);
300
301 /* Install a pte for a particular vaddr in kernel space. */
302 void set_pte_vaddr(unsigned long vaddr, pte_t pte);
303
304 extern void native_pagetable_reserve(u64 start, u64 end);
305 #ifdef CONFIG_X86_32
306 extern void native_pagetable_setup_start(pgd_t *base);
307 extern void native_pagetable_setup_done(pgd_t *base);
308 #else
309 #define native_pagetable_setup_start x86_init_pgd_noop
310 #define native_pagetable_setup_done  x86_init_pgd_noop
311 #endif
312
313 struct seq_file;
314 extern void arch_report_meminfo(struct seq_file *m);
315
316 enum {
317         PG_LEVEL_NONE,
318         PG_LEVEL_4K,
319         PG_LEVEL_2M,
320         PG_LEVEL_1G,
321         PG_LEVEL_NUM
322 };
323
324 #ifdef CONFIG_PROC_FS
325 extern void update_page_count(int level, unsigned long pages);
326 #else
327 static inline void update_page_count(int level, unsigned long pages) { }
328 #endif
329
330 /*
331  * Helper function that returns the kernel pagetable entry controlling
332  * the virtual address 'address'. NULL means no pagetable entry present.
333  * NOTE: the return type is pte_t but if the pmd is PSE then we return it
334  * as a pte too.
335  */
336 extern pte_t *lookup_address(unsigned long address, unsigned int *level);
337
338 #endif  /* !__ASSEMBLY__ */
339
340 #endif /* _ASM_X86_PGTABLE_DEFS_H */