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6c386655 JF |
1 | #ifndef _ASM_X86_PGTABLE_H |
2 | #define _ASM_X86_PGTABLE_H | |
3 | ||
6c386655 JF |
4 | #define FIRST_USER_ADDRESS 0 |
5 | ||
43cdf5d6 JS |
6 | #define _PAGE_BIT_PRESENT 0 /* is present */ |
7 | #define _PAGE_BIT_RW 1 /* writeable */ | |
8 | #define _PAGE_BIT_USER 2 /* userspace addressable */ | |
9 | #define _PAGE_BIT_PWT 3 /* page write through */ | |
10 | #define _PAGE_BIT_PCD 4 /* page cache disabled */ | |
11 | #define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */ | |
12 | #define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */ | |
6c386655 JF |
13 | #define _PAGE_BIT_FILE 6 |
14 | #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */ | |
9bf5a475 | 15 | #define _PAGE_BIT_PAT 7 /* on 4KB pages */ |
6c386655 JF |
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 | |
9bf5a475 | 20 | #define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */ |
a0a8f536 | 21 | #define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1 |
6c386655 JF |
22 | #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */ |
23 | ||
4226ab93 JF |
24 | #define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT) |
25 | #define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW) | |
26 | #define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER) | |
27 | #define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT) | |
28 | #define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD) | |
29 | #define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED) | |
30 | #define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY) | |
31 | #define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE) | |
32 | #define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL) | |
33 | #define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1) | |
34 | #define _PAGE_UNUSED2 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED2) | |
35 | #define _PAGE_UNUSED3 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED3) | |
36 | #define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT) | |
37 | #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE) | |
a0a8f536 NP |
38 | #define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL) |
39 | #define __HAVE_ARCH_PTE_SPECIAL | |
6c386655 JF |
40 | |
41 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) | |
4226ab93 | 42 | #define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX) |
6c386655 | 43 | #else |
4226ab93 | 44 | #define _PAGE_NX (_AT(pteval_t, 0)) |
6c386655 JF |
45 | #endif |
46 | ||
47 | /* If _PAGE_PRESENT is clear, we use these: */ | |
3cbaeafe JP |
48 | #define _PAGE_FILE _PAGE_DIRTY /* nonlinear file mapping, |
49 | * saved PTE; unset:swap */ | |
6c386655 JF |
50 | #define _PAGE_PROTNONE _PAGE_PSE /* if the user mapped it with PROT_NONE; |
51 | pte_present gives true */ | |
52 | ||
3cbaeafe JP |
53 | #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ |
54 | _PAGE_ACCESSED | _PAGE_DIRTY) | |
55 | #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \ | |
56 | _PAGE_DIRTY) | |
6c386655 | 57 | |
86aaf4fd | 58 | /* Set of bits not changed in pte_modify */ |
59438c9f | 59 | #define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \ |
a0a8f536 | 60 | _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY) |
6c386655 | 61 | |
2e5d9c85 | 62 | #define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT) |
63 | #define _PAGE_CACHE_WB (0) | |
64 | #define _PAGE_CACHE_WC (_PAGE_PWT) | |
65 | #define _PAGE_CACHE_UC_MINUS (_PAGE_PCD) | |
66 | #define _PAGE_CACHE_UC (_PAGE_PCD | _PAGE_PWT) | |
67 | ||
6c386655 | 68 | #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) |
3cbaeafe JP |
69 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ |
70 | _PAGE_ACCESSED | _PAGE_NX) | |
71 | ||
72 | #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \ | |
73 | _PAGE_USER | _PAGE_ACCESSED) | |
74 | #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ | |
75 | _PAGE_ACCESSED | _PAGE_NX) | |
76 | #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ | |
77 | _PAGE_ACCESSED) | |
6c386655 | 78 | #define PAGE_COPY PAGE_COPY_NOEXEC |
3cbaeafe JP |
79 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
80 | _PAGE_ACCESSED | _PAGE_NX) | |
81 | #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ | |
82 | _PAGE_ACCESSED) | |
6c386655 | 83 | |
6c386655 | 84 | #define __PAGE_KERNEL_EXEC \ |
8490638c | 85 | (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL) |
6c386655 | 86 | #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX) |
6c386655 JF |
87 | |
88 | #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW) | |
89 | #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW) | |
d2e626f4 | 90 | #define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT) |
b310f381 | 91 | #define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC) |
6c386655 | 92 | #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT) |
d546b67a | 93 | #define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD) |
6c386655 JF |
94 | #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER) |
95 | #define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT) | |
96 | #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE) | |
3a9e189d | 97 | #define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE) |
6c386655 JF |
98 | #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE) |
99 | ||
8490638c JF |
100 | #define PAGE_KERNEL __pgprot(__PAGE_KERNEL) |
101 | #define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO) | |
102 | #define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC) | |
103 | #define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX) | |
104 | #define PAGE_KERNEL_WC __pgprot(__PAGE_KERNEL_WC) | |
105 | #define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE) | |
106 | #define PAGE_KERNEL_UC_MINUS __pgprot(__PAGE_KERNEL_UC_MINUS) | |
107 | #define PAGE_KERNEL_EXEC_NOCACHE __pgprot(__PAGE_KERNEL_EXEC_NOCACHE) | |
108 | #define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE) | |
3a9e189d | 109 | #define PAGE_KERNEL_LARGE_NOCACHE __pgprot(__PAGE_KERNEL_LARGE_NOCACHE) |
8490638c JF |
110 | #define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC) |
111 | #define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL) | |
112 | #define PAGE_KERNEL_VSYSCALL_NOCACHE __pgprot(__PAGE_KERNEL_VSYSCALL_NOCACHE) | |
6c386655 JF |
113 | |
114 | /* xwr */ | |
115 | #define __P000 PAGE_NONE | |
116 | #define __P001 PAGE_READONLY | |
117 | #define __P010 PAGE_COPY | |
118 | #define __P011 PAGE_COPY | |
119 | #define __P100 PAGE_READONLY_EXEC | |
120 | #define __P101 PAGE_READONLY_EXEC | |
121 | #define __P110 PAGE_COPY_EXEC | |
122 | #define __P111 PAGE_COPY_EXEC | |
123 | ||
124 | #define __S000 PAGE_NONE | |
125 | #define __S001 PAGE_READONLY | |
126 | #define __S010 PAGE_SHARED | |
127 | #define __S011 PAGE_SHARED | |
128 | #define __S100 PAGE_READONLY_EXEC | |
129 | #define __S101 PAGE_READONLY_EXEC | |
130 | #define __S110 PAGE_SHARED_EXEC | |
131 | #define __S111 PAGE_SHARED_EXEC | |
132 | ||
4614139c | 133 | #ifndef __ASSEMBLY__ |
195466dc | 134 | |
8405b122 JF |
135 | /* |
136 | * ZERO_PAGE is a global shared page that is always zero: used | |
137 | * for zero-mapped memory areas etc.. | |
138 | */ | |
3cbaeafe | 139 | extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; |
8405b122 JF |
140 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
141 | ||
e3ed910d JF |
142 | extern spinlock_t pgd_lock; |
143 | extern struct list_head pgd_list; | |
8405b122 | 144 | |
4614139c JF |
145 | /* |
146 | * The following only work if pte_present() is true. | |
147 | * Undefined behaviour if not.. | |
148 | */ | |
3cbaeafe JP |
149 | static inline int pte_dirty(pte_t pte) |
150 | { | |
a15af1c9 | 151 | return pte_flags(pte) & _PAGE_DIRTY; |
3cbaeafe JP |
152 | } |
153 | ||
154 | static inline int pte_young(pte_t pte) | |
155 | { | |
a15af1c9 | 156 | return pte_flags(pte) & _PAGE_ACCESSED; |
3cbaeafe JP |
157 | } |
158 | ||
159 | static inline int pte_write(pte_t pte) | |
160 | { | |
a15af1c9 | 161 | return pte_flags(pte) & _PAGE_RW; |
3cbaeafe JP |
162 | } |
163 | ||
164 | static inline int pte_file(pte_t pte) | |
165 | { | |
a15af1c9 | 166 | return pte_flags(pte) & _PAGE_FILE; |
3cbaeafe JP |
167 | } |
168 | ||
169 | static inline int pte_huge(pte_t pte) | |
170 | { | |
a15af1c9 | 171 | return pte_flags(pte) & _PAGE_PSE; |
4614139c JF |
172 | } |
173 | ||
3cbaeafe JP |
174 | static inline int pte_global(pte_t pte) |
175 | { | |
a15af1c9 | 176 | return pte_flags(pte) & _PAGE_GLOBAL; |
3cbaeafe JP |
177 | } |
178 | ||
179 | static inline int pte_exec(pte_t pte) | |
180 | { | |
a15af1c9 | 181 | return !(pte_flags(pte) & _PAGE_NX); |
3cbaeafe JP |
182 | } |
183 | ||
7e675137 NP |
184 | static inline int pte_special(pte_t pte) |
185 | { | |
a0a8f536 | 186 | return pte_val(pte) & _PAGE_SPECIAL; |
7e675137 NP |
187 | } |
188 | ||
3cbaeafe JP |
189 | static inline int pmd_large(pmd_t pte) |
190 | { | |
191 | return (pmd_val(pte) & (_PAGE_PSE | _PAGE_PRESENT)) == | |
192 | (_PAGE_PSE | _PAGE_PRESENT); | |
193 | } | |
194 | ||
195 | static inline pte_t pte_mkclean(pte_t pte) | |
196 | { | |
4226ab93 | 197 | return __pte(pte_val(pte) & ~_PAGE_DIRTY); |
3cbaeafe JP |
198 | } |
199 | ||
200 | static inline pte_t pte_mkold(pte_t pte) | |
201 | { | |
4226ab93 | 202 | return __pte(pte_val(pte) & ~_PAGE_ACCESSED); |
3cbaeafe JP |
203 | } |
204 | ||
205 | static inline pte_t pte_wrprotect(pte_t pte) | |
206 | { | |
4226ab93 | 207 | return __pte(pte_val(pte) & ~_PAGE_RW); |
3cbaeafe JP |
208 | } |
209 | ||
210 | static inline pte_t pte_mkexec(pte_t pte) | |
211 | { | |
4226ab93 | 212 | return __pte(pte_val(pte) & ~_PAGE_NX); |
3cbaeafe JP |
213 | } |
214 | ||
215 | static inline pte_t pte_mkdirty(pte_t pte) | |
216 | { | |
217 | return __pte(pte_val(pte) | _PAGE_DIRTY); | |
218 | } | |
219 | ||
220 | static inline pte_t pte_mkyoung(pte_t pte) | |
221 | { | |
222 | return __pte(pte_val(pte) | _PAGE_ACCESSED); | |
223 | } | |
224 | ||
225 | static inline pte_t pte_mkwrite(pte_t pte) | |
226 | { | |
227 | return __pte(pte_val(pte) | _PAGE_RW); | |
228 | } | |
229 | ||
230 | static inline pte_t pte_mkhuge(pte_t pte) | |
231 | { | |
232 | return __pte(pte_val(pte) | _PAGE_PSE); | |
233 | } | |
234 | ||
235 | static inline pte_t pte_clrhuge(pte_t pte) | |
236 | { | |
4226ab93 | 237 | return __pte(pte_val(pte) & ~_PAGE_PSE); |
3cbaeafe JP |
238 | } |
239 | ||
240 | static inline pte_t pte_mkglobal(pte_t pte) | |
241 | { | |
242 | return __pte(pte_val(pte) | _PAGE_GLOBAL); | |
243 | } | |
244 | ||
245 | static inline pte_t pte_clrglobal(pte_t pte) | |
246 | { | |
4226ab93 | 247 | return __pte(pte_val(pte) & ~_PAGE_GLOBAL); |
3cbaeafe | 248 | } |
4614139c | 249 | |
7e675137 NP |
250 | static inline pte_t pte_mkspecial(pte_t pte) |
251 | { | |
a0a8f536 | 252 | return __pte(pte_val(pte) | _PAGE_SPECIAL); |
7e675137 NP |
253 | } |
254 | ||
6fdc05d4 JF |
255 | extern pteval_t __supported_pte_mask; |
256 | ||
257 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) | |
258 | { | |
259 | return __pte((((phys_addr_t)page_nr << PAGE_SHIFT) | | |
260 | pgprot_val(pgprot)) & __supported_pte_mask); | |
261 | } | |
262 | ||
263 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) | |
264 | { | |
265 | return __pmd((((phys_addr_t)page_nr << PAGE_SHIFT) | | |
266 | pgprot_val(pgprot)) & __supported_pte_mask); | |
267 | } | |
268 | ||
38472311 IM |
269 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
270 | { | |
271 | pteval_t val = pte_val(pte); | |
272 | ||
273 | /* | |
274 | * Chop off the NX bit (if present), and add the NX portion of | |
275 | * the newprot (if present): | |
276 | */ | |
1c12c4cf VP |
277 | val &= _PAGE_CHG_MASK; |
278 | val |= pgprot_val(newprot) & (~_PAGE_CHG_MASK) & __supported_pte_mask; | |
38472311 IM |
279 | |
280 | return __pte(val); | |
281 | } | |
282 | ||
1c12c4cf VP |
283 | /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
284 | #define pgprot_modify pgprot_modify | |
285 | static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) | |
286 | { | |
287 | pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; | |
288 | pgprotval_t addbits = pgprot_val(newprot); | |
289 | return __pgprot(preservebits | addbits); | |
290 | } | |
291 | ||
77be1fab | 292 | #define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK) |
c6ca18eb | 293 | |
1e8e23bc AK |
294 | #define canon_pgprot(p) __pgprot(pgprot_val(p) & __supported_pte_mask) |
295 | ||
f0970c13 | 296 | #ifndef __ASSEMBLY__ |
297 | #define __HAVE_PHYS_MEM_ACCESS_PROT | |
298 | struct file; | |
299 | pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, | |
300 | unsigned long size, pgprot_t vma_prot); | |
301 | int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn, | |
302 | unsigned long size, pgprot_t *vma_prot); | |
303 | #endif | |
304 | ||
d494a961 JF |
305 | /* Install a pte for a particular vaddr in kernel space. */ |
306 | void set_pte_vaddr(unsigned long vaddr, pte_t pte); | |
307 | ||
a312b37b EH |
308 | #ifdef CONFIG_X86_32 |
309 | extern void native_pagetable_setup_start(pgd_t *base); | |
310 | extern void native_pagetable_setup_done(pgd_t *base); | |
311 | #else | |
312 | static inline void native_pagetable_setup_start(pgd_t *base) {} | |
313 | static inline void native_pagetable_setup_done(pgd_t *base) {} | |
314 | #endif | |
315 | ||
4891645e JF |
316 | #ifdef CONFIG_PARAVIRT |
317 | #include <asm/paravirt.h> | |
318 | #else /* !CONFIG_PARAVIRT */ | |
319 | #define set_pte(ptep, pte) native_set_pte(ptep, pte) | |
320 | #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) | |
321 | ||
322 | #define set_pte_present(mm, addr, ptep, pte) \ | |
323 | native_set_pte_present(mm, addr, ptep, pte) | |
324 | #define set_pte_atomic(ptep, pte) \ | |
325 | native_set_pte_atomic(ptep, pte) | |
326 | ||
327 | #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) | |
328 | ||
329 | #ifndef __PAGETABLE_PUD_FOLDED | |
330 | #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) | |
331 | #define pgd_clear(pgd) native_pgd_clear(pgd) | |
332 | #endif | |
333 | ||
334 | #ifndef set_pud | |
335 | # define set_pud(pudp, pud) native_set_pud(pudp, pud) | |
336 | #endif | |
337 | ||
338 | #ifndef __PAGETABLE_PMD_FOLDED | |
339 | #define pud_clear(pud) native_pud_clear(pud) | |
340 | #endif | |
341 | ||
342 | #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) | |
343 | #define pmd_clear(pmd) native_pmd_clear(pmd) | |
344 | ||
345 | #define pte_update(mm, addr, ptep) do { } while (0) | |
346 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
a312b37b EH |
347 | |
348 | static inline void __init paravirt_pagetable_setup_start(pgd_t *base) | |
349 | { | |
350 | native_pagetable_setup_start(base); | |
351 | } | |
352 | ||
353 | static inline void __init paravirt_pagetable_setup_done(pgd_t *base) | |
354 | { | |
355 | native_pagetable_setup_done(base); | |
356 | } | |
4891645e JF |
357 | #endif /* CONFIG_PARAVIRT */ |
358 | ||
4614139c JF |
359 | #endif /* __ASSEMBLY__ */ |
360 | ||
96a388de TG |
361 | #ifdef CONFIG_X86_32 |
362 | # include "pgtable_32.h" | |
363 | #else | |
364 | # include "pgtable_64.h" | |
365 | #endif | |
6c386655 | 366 | |
fb15a9b3 JF |
367 | /* |
368 | * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] | |
369 | * | |
370 | * this macro returns the index of the entry in the pgd page which would | |
371 | * control the given virtual address | |
372 | */ | |
373 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) | |
374 | ||
375 | /* | |
376 | * pgd_offset() returns a (pgd_t *) | |
377 | * pgd_index() is used get the offset into the pgd page's array of pgd_t's; | |
378 | */ | |
379 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address))) | |
380 | /* | |
381 | * a shortcut which implies the use of the kernel's pgd, instead | |
382 | * of a process's | |
383 | */ | |
384 | #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) | |
385 | ||
386 | ||
68db065c JF |
387 | #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
388 | #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) | |
389 | ||
195466dc JF |
390 | #ifndef __ASSEMBLY__ |
391 | ||
30551bb3 TG |
392 | enum { |
393 | PG_LEVEL_NONE, | |
394 | PG_LEVEL_4K, | |
395 | PG_LEVEL_2M, | |
86f03989 | 396 | PG_LEVEL_1G, |
ce0c0e50 | 397 | PG_LEVEL_NUM |
30551bb3 TG |
398 | }; |
399 | ||
65280e61 TG |
400 | #ifdef CONFIG_PROC_FS |
401 | extern void update_page_count(int level, unsigned long pages); | |
402 | #else | |
403 | static inline void update_page_count(int level, unsigned long pages) { } | |
404 | #endif | |
ce0c0e50 | 405 | |
0a663088 TG |
406 | /* |
407 | * Helper function that returns the kernel pagetable entry controlling | |
408 | * the virtual address 'address'. NULL means no pagetable entry present. | |
409 | * NOTE: the return type is pte_t but if the pmd is PSE then we return it | |
410 | * as a pte too. | |
411 | */ | |
da7bfc50 | 412 | extern pte_t *lookup_address(unsigned long address, unsigned int *level); |
0a663088 | 413 | |
4891645e JF |
414 | /* local pte updates need not use xchg for locking */ |
415 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) | |
416 | { | |
417 | pte_t res = *ptep; | |
418 | ||
419 | /* Pure native function needs no input for mm, addr */ | |
420 | native_pte_clear(NULL, 0, ptep); | |
421 | return res; | |
422 | } | |
423 | ||
424 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, | |
425 | pte_t *ptep , pte_t pte) | |
426 | { | |
427 | native_set_pte(ptep, pte); | |
428 | } | |
429 | ||
195466dc JF |
430 | #ifndef CONFIG_PARAVIRT |
431 | /* | |
432 | * Rules for using pte_update - it must be called after any PTE update which | |
433 | * has not been done using the set_pte / clear_pte interfaces. It is used by | |
434 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE | |
435 | * updates should either be sets, clears, or set_pte_atomic for P->P | |
436 | * transitions, which means this hook should only be called for user PTEs. | |
437 | * This hook implies a P->P protection or access change has taken place, which | |
438 | * requires a subsequent TLB flush. The notification can optionally be delayed | |
439 | * until the TLB flush event by using the pte_update_defer form of the | |
440 | * interface, but care must be taken to assure that the flush happens while | |
441 | * still holding the same page table lock so that the shadow and primary pages | |
442 | * do not become out of sync on SMP. | |
443 | */ | |
444 | #define pte_update(mm, addr, ptep) do { } while (0) | |
445 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
446 | #endif | |
447 | ||
195466dc JF |
448 | /* |
449 | * We only update the dirty/accessed state if we set | |
450 | * the dirty bit by hand in the kernel, since the hardware | |
451 | * will do the accessed bit for us, and we don't want to | |
452 | * race with other CPU's that might be updating the dirty | |
453 | * bit at the same time. | |
454 | */ | |
bea41808 JF |
455 | struct vm_area_struct; |
456 | ||
195466dc | 457 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
ee5aa8d3 JF |
458 | extern int ptep_set_access_flags(struct vm_area_struct *vma, |
459 | unsigned long address, pte_t *ptep, | |
460 | pte_t entry, int dirty); | |
195466dc JF |
461 | |
462 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG | |
f9fbf1a3 JF |
463 | extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
464 | unsigned long addr, pte_t *ptep); | |
195466dc JF |
465 | |
466 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH | |
c20311e1 JF |
467 | extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
468 | unsigned long address, pte_t *ptep); | |
195466dc JF |
469 | |
470 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR | |
3cbaeafe JP |
471 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
472 | pte_t *ptep) | |
195466dc JF |
473 | { |
474 | pte_t pte = native_ptep_get_and_clear(ptep); | |
475 | pte_update(mm, addr, ptep); | |
476 | return pte; | |
477 | } | |
478 | ||
479 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL | |
3cbaeafe JP |
480 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
481 | unsigned long addr, pte_t *ptep, | |
482 | int full) | |
195466dc JF |
483 | { |
484 | pte_t pte; | |
485 | if (full) { | |
486 | /* | |
487 | * Full address destruction in progress; paravirt does not | |
488 | * care about updates and native needs no locking | |
489 | */ | |
490 | pte = native_local_ptep_get_and_clear(ptep); | |
491 | } else { | |
492 | pte = ptep_get_and_clear(mm, addr, ptep); | |
493 | } | |
494 | return pte; | |
495 | } | |
496 | ||
497 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT | |
3cbaeafe JP |
498 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
499 | unsigned long addr, pte_t *ptep) | |
195466dc | 500 | { |
d8d89827 | 501 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
195466dc JF |
502 | pte_update(mm, addr, ptep); |
503 | } | |
504 | ||
85958b46 JF |
505 | /* |
506 | * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); | |
507 | * | |
508 | * dst - pointer to pgd range anwhere on a pgd page | |
509 | * src - "" | |
510 | * count - the number of pgds to copy. | |
511 | * | |
512 | * dst and src can be on the same page, but the range must not overlap, | |
513 | * and must not cross a page boundary. | |
514 | */ | |
515 | static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) | |
516 | { | |
517 | memcpy(dst, src, count * sizeof(pgd_t)); | |
518 | } | |
519 | ||
520 | ||
195466dc JF |
521 | #include <asm-generic/pgtable.h> |
522 | #endif /* __ASSEMBLY__ */ | |
523 | ||
6c386655 | 524 | #endif /* _ASM_X86_PGTABLE_H */ |