1#ifndef _ASM_X86_PGTABLE_H
2#define _ASM_X86_PGTABLE_H
3
4#include <asm/page.h>
5#include <asm/e820.h>
6
7#include <asm/pgtable_types.h>
8
9
10
11
12#define pgprot_noncached(prot) \
13 ((boot_cpu_data.x86 > 3) \
14 ? (__pgprot(pgprot_val(prot) | _PAGE_CACHE_UC_MINUS)) \
15 : (prot))
16
17#ifndef __ASSEMBLY__
18
19#include <asm/x86_init.h>
20
21
22
23
24
25extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
26#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
27
28extern spinlock_t pgd_lock;
29extern struct list_head pgd_list;
30
31extern struct mm_struct *pgd_page_get_mm(struct page *page);
32
33#ifdef CONFIG_PARAVIRT
34#include <asm/paravirt.h>
35#else
36#define set_pte(ptep, pte) native_set_pte(ptep, pte)
37#define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte)
38#define set_pmd_at(mm, addr, pmdp, pmd) native_set_pmd_at(mm, addr, pmdp, pmd)
39
40#define set_pte_atomic(ptep, pte) \
41 native_set_pte_atomic(ptep, pte)
42
43#define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd)
44
45#ifndef __PAGETABLE_PUD_FOLDED
46#define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd)
47#define pgd_clear(pgd) native_pgd_clear(pgd)
48#endif
49
50#ifndef set_pud
51# define set_pud(pudp, pud) native_set_pud(pudp, pud)
52#endif
53
54#ifndef __PAGETABLE_PMD_FOLDED
55#define pud_clear(pud) native_pud_clear(pud)
56#endif
57
58#define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep)
59#define pmd_clear(pmd) native_pmd_clear(pmd)
60
61#define pte_update(mm, addr, ptep) do { } while (0)
62#define pte_update_defer(mm, addr, ptep) do { } while (0)
63#define pmd_update(mm, addr, ptep) do { } while (0)
64#define pmd_update_defer(mm, addr, ptep) do { } while (0)
65
66#define pgd_val(x) native_pgd_val(x)
67#define __pgd(x) native_make_pgd(x)
68
69#ifndef __PAGETABLE_PUD_FOLDED
70#define pud_val(x) native_pud_val(x)
71#define __pud(x) native_make_pud(x)
72#endif
73
74#ifndef __PAGETABLE_PMD_FOLDED
75#define pmd_val(x) native_pmd_val(x)
76#define __pmd(x) native_make_pmd(x)
77#endif
78
79#define pte_val(x) native_pte_val(x)
80#define __pte(x) native_make_pte(x)
81
82#define arch_end_context_switch(prev) do {} while(0)
83
84#endif
85
86
87
88
89
90static inline int pte_dirty(pte_t pte)
91{
92 return pte_flags(pte) & _PAGE_DIRTY;
93}
94
95static inline int pte_young(pte_t pte)
96{
97 return pte_flags(pte) & _PAGE_ACCESSED;
98}
99
100static inline int pmd_young(pmd_t pmd)
101{
102 return pmd_flags(pmd) & _PAGE_ACCESSED;
103}
104
105static inline int pte_write(pte_t pte)
106{
107 return pte_flags(pte) & _PAGE_RW;
108}
109
110static inline int pte_file(pte_t pte)
111{
112 return pte_flags(pte) & _PAGE_FILE;
113}
114
115static inline int pte_huge(pte_t pte)
116{
117 return pte_flags(pte) & _PAGE_PSE;
118}
119
120static inline int pte_global(pte_t pte)
121{
122 return pte_flags(pte) & _PAGE_GLOBAL;
123}
124
125static inline int pte_exec(pte_t pte)
126{
127 return !(pte_flags(pte) & _PAGE_NX);
128}
129
130static inline int pte_special(pte_t pte)
131{
132 return pte_flags(pte) & _PAGE_SPECIAL;
133}
134
135static inline unsigned long pte_pfn(pte_t pte)
136{
137 return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT;
138}
139
140static inline unsigned long pmd_pfn(pmd_t pmd)
141{
142 return (pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT;
143}
144
145#define pte_page(pte) pfn_to_page(pte_pfn(pte))
146
147static inline int pmd_large(pmd_t pte)
148{
149 return (pmd_flags(pte) & (_PAGE_PSE | _PAGE_PRESENT)) ==
150 (_PAGE_PSE | _PAGE_PRESENT);
151}
152
153#ifdef CONFIG_TRANSPARENT_HUGEPAGE
154static inline int pmd_trans_splitting(pmd_t pmd)
155{
156 return pmd_val(pmd) & _PAGE_SPLITTING;
157}
158
159static inline int pmd_trans_huge(pmd_t pmd)
160{
161 return pmd_val(pmd) & _PAGE_PSE;
162}
163
164static inline int has_transparent_hugepage(void)
165{
166 return cpu_has_pse;
167}
168#endif
169
170static inline pte_t pte_set_flags(pte_t pte, pteval_t set)
171{
172 pteval_t v = native_pte_val(pte);
173
174 return native_make_pte(v | set);
175}
176
177static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear)
178{
179 pteval_t v = native_pte_val(pte);
180
181 return native_make_pte(v & ~clear);
182}
183
184static inline pte_t pte_mkclean(pte_t pte)
185{
186 return pte_clear_flags(pte, _PAGE_DIRTY);
187}
188
189static inline pte_t pte_mkold(pte_t pte)
190{
191 return pte_clear_flags(pte, _PAGE_ACCESSED);
192}
193
194static inline pte_t pte_wrprotect(pte_t pte)
195{
196 return pte_clear_flags(pte, _PAGE_RW);
197}
198
199static inline pte_t pte_mkexec(pte_t pte)
200{
201 return pte_clear_flags(pte, _PAGE_NX);
202}
203
204static inline pte_t pte_mkdirty(pte_t pte)
205{
206 return pte_set_flags(pte, _PAGE_DIRTY);
207}
208
209static inline pte_t pte_mkyoung(pte_t pte)
210{
211 return pte_set_flags(pte, _PAGE_ACCESSED);
212}
213
214static inline pte_t pte_mkwrite(pte_t pte)
215{
216 return pte_set_flags(pte, _PAGE_RW);
217}
218
219static inline pte_t pte_mkhuge(pte_t pte)
220{
221 return pte_set_flags(pte, _PAGE_PSE);
222}
223
224static inline pte_t pte_clrhuge(pte_t pte)
225{
226 return pte_clear_flags(pte, _PAGE_PSE);
227}
228
229static inline pte_t pte_mkglobal(pte_t pte)
230{
231 return pte_set_flags(pte, _PAGE_GLOBAL);
232}
233
234static inline pte_t pte_clrglobal(pte_t pte)
235{
236 return pte_clear_flags(pte, _PAGE_GLOBAL);
237}
238
239static inline pte_t pte_mkspecial(pte_t pte)
240{
241 return pte_set_flags(pte, _PAGE_SPECIAL);
242}
243
244static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set)
245{
246 pmdval_t v = native_pmd_val(pmd);
247
248 return __pmd(v | set);
249}
250
251static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear)
252{
253 pmdval_t v = native_pmd_val(pmd);
254
255 return __pmd(v & ~clear);
256}
257
258static inline pmd_t pmd_mkold(pmd_t pmd)
259{
260 return pmd_clear_flags(pmd, _PAGE_ACCESSED);
261}
262
263static inline pmd_t pmd_wrprotect(pmd_t pmd)
264{
265 return pmd_clear_flags(pmd, _PAGE_RW);
266}
267
268static inline pmd_t pmd_mkdirty(pmd_t pmd)
269{
270 return pmd_set_flags(pmd, _PAGE_DIRTY);
271}
272
273static inline pmd_t pmd_mkhuge(pmd_t pmd)
274{
275 return pmd_set_flags(pmd, _PAGE_PSE);
276}
277
278static inline pmd_t pmd_mkyoung(pmd_t pmd)
279{
280 return pmd_set_flags(pmd, _PAGE_ACCESSED);
281}
282
283static inline pmd_t pmd_mkwrite(pmd_t pmd)
284{
285 return pmd_set_flags(pmd, _PAGE_RW);
286}
287
288static inline pmd_t pmd_mknotpresent(pmd_t pmd)
289{
290 return pmd_clear_flags(pmd, _PAGE_PRESENT);
291}
292
293
294
295
296
297static inline pgprotval_t massage_pgprot(pgprot_t pgprot)
298{
299 pgprotval_t protval = pgprot_val(pgprot);
300
301 if (protval & _PAGE_PRESENT)
302 protval &= __supported_pte_mask;
303
304 return protval;
305}
306
307static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
308{
309 return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) |
310 massage_pgprot(pgprot));
311}
312
313static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
314{
315 return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) |
316 massage_pgprot(pgprot));
317}
318
319static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
320{
321 pteval_t val = pte_val(pte);
322
323
324
325
326
327 val &= _PAGE_CHG_MASK;
328 val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK;
329
330 return __pte(val);
331}
332
333static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
334{
335 pmdval_t val = pmd_val(pmd);
336
337 val &= _HPAGE_CHG_MASK;
338 val |= massage_pgprot(newprot) & ~_HPAGE_CHG_MASK;
339
340 return __pmd(val);
341}
342
343
344#define pgprot_modify pgprot_modify
345static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot)
346{
347 pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK;
348 pgprotval_t addbits = pgprot_val(newprot);
349 return __pgprot(preservebits | addbits);
350}
351
352#define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK)
353
354#define canon_pgprot(p) __pgprot(massage_pgprot(p))
355
356static inline int is_new_memtype_allowed(u64 paddr, unsigned long size,
357 unsigned long flags,
358 unsigned long new_flags)
359{
360
361
362
363 if (x86_platform.is_untracked_pat_range(paddr, paddr + size))
364 return 1;
365
366
367
368
369
370
371
372 if ((flags == _PAGE_CACHE_UC_MINUS &&
373 new_flags == _PAGE_CACHE_WB) ||
374 (flags == _PAGE_CACHE_WC &&
375 new_flags == _PAGE_CACHE_WB)) {
376 return 0;
377 }
378
379 return 1;
380}
381
382pmd_t *populate_extra_pmd(unsigned long vaddr);
383pte_t *populate_extra_pte(unsigned long vaddr);
384#endif
385
386#ifdef CONFIG_X86_32
387# include "pgtable_32.h"
388#else
389# include "pgtable_64.h"
390#endif
391
392#ifndef __ASSEMBLY__
393#include <linux/mm_types.h>
394
395static inline int pte_none(pte_t pte)
396{
397 return !pte.pte;
398}
399
400#define __HAVE_ARCH_PTE_SAME
401static inline int pte_same(pte_t a, pte_t b)
402{
403 return a.pte == b.pte;
404}
405
406static inline int pte_present(pte_t a)
407{
408 return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE);
409}
410
411static inline int pte_hidden(pte_t pte)
412{
413 return pte_flags(pte) & _PAGE_HIDDEN;
414}
415
416static inline int pmd_present(pmd_t pmd)
417{
418 return pmd_flags(pmd) & _PAGE_PRESENT;
419}
420
421static inline int pmd_none(pmd_t pmd)
422{
423
424
425 return (unsigned long)native_pmd_val(pmd) == 0;
426}
427
428static inline unsigned long pmd_page_vaddr(pmd_t pmd)
429{
430 return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK);
431}
432
433
434
435
436
437#define pmd_page(pmd) pfn_to_page((pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT)
438
439
440
441
442
443
444
445static inline unsigned long pmd_index(unsigned long address)
446{
447 return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
448}
449
450
451
452
453
454
455
456
457#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
458
459
460
461
462
463
464
465static inline unsigned long pte_index(unsigned long address)
466{
467 return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);
468}
469
470static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address)
471{
472 return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address);
473}
474
475static inline int pmd_bad(pmd_t pmd)
476{
477 return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE;
478}
479
480static inline unsigned long pages_to_mb(unsigned long npg)
481{
482 return npg >> (20 - PAGE_SHIFT);
483}
484
485#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
486 remap_pfn_range(vma, vaddr, pfn, size, prot)
487
488#if PAGETABLE_LEVELS > 2
489static inline int pud_none(pud_t pud)
490{
491 return native_pud_val(pud) == 0;
492}
493
494static inline int pud_present(pud_t pud)
495{
496 return pud_flags(pud) & _PAGE_PRESENT;
497}
498
499static inline unsigned long pud_page_vaddr(pud_t pud)
500{
501 return (unsigned long)__va((unsigned long)pud_val(pud) & PTE_PFN_MASK);
502}
503
504
505
506
507
508#define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT)
509
510
511static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
512{
513 return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
514}
515
516static inline int pud_large(pud_t pud)
517{
518 return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) ==
519 (_PAGE_PSE | _PAGE_PRESENT);
520}
521
522static inline int pud_bad(pud_t pud)
523{
524 return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0;
525}
526#else
527static inline int pud_large(pud_t pud)
528{
529 return 0;
530}
531#endif
532
533#if PAGETABLE_LEVELS > 3
534static inline int pgd_present(pgd_t pgd)
535{
536 return pgd_flags(pgd) & _PAGE_PRESENT;
537}
538
539static inline unsigned long pgd_page_vaddr(pgd_t pgd)
540{
541 return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK);
542}
543
544
545
546
547
548#define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT)
549
550
551static inline unsigned long pud_index(unsigned long address)
552{
553 return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1);
554}
555
556static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address)
557{
558 return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address);
559}
560
561static inline int pgd_bad(pgd_t pgd)
562{
563 return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE;
564}
565
566static inline int pgd_none(pgd_t pgd)
567{
568 return !native_pgd_val(pgd);
569}
570#endif
571
572#endif
573
574
575
576
577
578
579
580#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
581
582
583
584
585
586#define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address)))
587
588
589
590
591#define pgd_offset_k(address) pgd_offset(&init_mm, (address))
592
593
594#define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET)
595#define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY)
596
597#ifndef __ASSEMBLY__
598
599extern int direct_gbpages;
600
601
602static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
603{
604 pte_t res = *ptep;
605
606
607 native_pte_clear(NULL, 0, ptep);
608 return res;
609}
610
611static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp)
612{
613 pmd_t res = *pmdp;
614
615 native_pmd_clear(pmdp);
616 return res;
617}
618
619static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr,
620 pte_t *ptep , pte_t pte)
621{
622 native_set_pte(ptep, pte);
623}
624
625static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr,
626 pmd_t *pmdp , pmd_t pmd)
627{
628 native_set_pmd(pmdp, pmd);
629}
630
631#ifndef CONFIG_PARAVIRT
632
633
634
635
636
637
638
639
640
641
642
643
644
645#define pte_update(mm, addr, ptep) do { } while (0)
646#define pte_update_defer(mm, addr, ptep) do { } while (0)
647#endif
648
649
650
651
652
653
654
655
656struct vm_area_struct;
657
658#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
659extern int ptep_set_access_flags(struct vm_area_struct *vma,
660 unsigned long address, pte_t *ptep,
661 pte_t entry, int dirty);
662
663#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
664extern int ptep_test_and_clear_young(struct vm_area_struct *vma,
665 unsigned long addr, pte_t *ptep);
666
667#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
668extern int ptep_clear_flush_young(struct vm_area_struct *vma,
669 unsigned long address, pte_t *ptep);
670
671#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
672static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
673 pte_t *ptep)
674{
675 pte_t pte = native_ptep_get_and_clear(ptep);
676 pte_update(mm, addr, ptep);
677 return pte;
678}
679
680#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
681static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
682 unsigned long addr, pte_t *ptep,
683 int full)
684{
685 pte_t pte;
686 if (full) {
687
688
689
690
691 pte = native_local_ptep_get_and_clear(ptep);
692 } else {
693 pte = ptep_get_and_clear(mm, addr, ptep);
694 }
695 return pte;
696}
697
698#define __HAVE_ARCH_PTEP_SET_WRPROTECT
699static inline void ptep_set_wrprotect(struct mm_struct *mm,
700 unsigned long addr, pte_t *ptep)
701{
702 clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte);
703 pte_update(mm, addr, ptep);
704}
705
706#define flush_tlb_fix_spurious_fault(vma, address)
707
708#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
709
710#define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
711extern int pmdp_set_access_flags(struct vm_area_struct *vma,
712 unsigned long address, pmd_t *pmdp,
713 pmd_t entry, int dirty);
714
715#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
716extern int pmdp_test_and_clear_young(struct vm_area_struct *vma,
717 unsigned long addr, pmd_t *pmdp);
718
719#define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
720extern int pmdp_clear_flush_young(struct vm_area_struct *vma,
721 unsigned long address, pmd_t *pmdp);
722
723
724#define __HAVE_ARCH_PMDP_SPLITTING_FLUSH
725extern void pmdp_splitting_flush(struct vm_area_struct *vma,
726 unsigned long addr, pmd_t *pmdp);
727
728#define __HAVE_ARCH_PMD_WRITE
729static inline int pmd_write(pmd_t pmd)
730{
731 return pmd_flags(pmd) & _PAGE_RW;
732}
733
734#define __HAVE_ARCH_PMDP_GET_AND_CLEAR
735static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, unsigned long addr,
736 pmd_t *pmdp)
737{
738 pmd_t pmd = native_pmdp_get_and_clear(pmdp);
739 pmd_update(mm, addr, pmdp);
740 return pmd;
741}
742
743#define __HAVE_ARCH_PMDP_SET_WRPROTECT
744static inline void pmdp_set_wrprotect(struct mm_struct *mm,
745 unsigned long addr, pmd_t *pmdp)
746{
747 clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp);
748 pmd_update(mm, addr, pmdp);
749}
750
751
752
753
754
755
756
757
758
759
760
761static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
762{
763 memcpy(dst, src, count * sizeof(pgd_t));
764}
765
766
767#include <asm-generic/pgtable.h>
768#endif
769
770#endif
771