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 __visible;
27#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
28
29extern spinlock_t pgd_lock;
30extern struct list_head pgd_list;
31
32extern struct mm_struct *pgd_page_get_mm(struct page *page);
33
34#ifdef CONFIG_PARAVIRT
35#include <asm/paravirt.h>
36#else
37#define set_pte(ptep, pte) native_set_pte(ptep, pte)
38#define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte)
39#define set_pmd_at(mm, addr, pmdp, pmd) native_set_pmd_at(mm, addr, pmdp, pmd)
40
41#define set_pte_atomic(ptep, pte) \
42 native_set_pte_atomic(ptep, pte)
43
44#define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd)
45
46#ifndef __PAGETABLE_PUD_FOLDED
47#define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd)
48#define pgd_clear(pgd) native_pgd_clear(pgd)
49#endif
50
51#ifndef set_pud
52# define set_pud(pudp, pud) native_set_pud(pudp, pud)
53#endif
54
55#ifndef __PAGETABLE_PMD_FOLDED
56#define pud_clear(pud) native_pud_clear(pud)
57#endif
58
59#define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep)
60#define pmd_clear(pmd) native_pmd_clear(pmd)
61
62#define pte_update(mm, addr, ptep) do { } while (0)
63#define pte_update_defer(mm, addr, ptep) do { } while (0)
64#define pmd_update(mm, addr, ptep) do { } while (0)
65#define pmd_update_defer(mm, addr, ptep) do { } while (0)
66
67#define pgd_val(x) native_pgd_val(x)
68#define __pgd(x) native_make_pgd(x)
69
70#ifndef __PAGETABLE_PUD_FOLDED
71#define pud_val(x) native_pud_val(x)
72#define __pud(x) native_make_pud(x)
73#endif
74
75#ifndef __PAGETABLE_PMD_FOLDED
76#define pmd_val(x) native_pmd_val(x)
77#define __pmd(x) native_make_pmd(x)
78#endif
79
80#define pte_val(x) native_pte_val(x)
81#define __pte(x) native_make_pte(x)
82
83#define arch_end_context_switch(prev) do {} while(0)
84
85#endif
86
87
88
89
90
91static inline int pte_dirty(pte_t pte)
92{
93 return pte_flags(pte) & _PAGE_DIRTY;
94}
95
96static inline int pte_young(pte_t pte)
97{
98 return pte_flags(pte) & _PAGE_ACCESSED;
99}
100
101static inline int pmd_young(pmd_t pmd)
102{
103 return pmd_flags(pmd) & _PAGE_ACCESSED;
104}
105
106static inline int pte_write(pte_t pte)
107{
108 return pte_flags(pte) & _PAGE_RW;
109}
110
111static inline int pte_file(pte_t pte)
112{
113 return pte_flags(pte) & _PAGE_FILE;
114}
115
116static inline int pte_huge(pte_t pte)
117{
118 return pte_flags(pte) & _PAGE_PSE;
119}
120
121static inline int pte_global(pte_t pte)
122{
123 return pte_flags(pte) & _PAGE_GLOBAL;
124}
125
126static inline int pte_exec(pte_t pte)
127{
128 return !(pte_flags(pte) & _PAGE_NX);
129}
130
131static inline int pte_special(pte_t pte)
132{
133 return pte_flags(pte) & _PAGE_SPECIAL;
134}
135
136static inline unsigned long pte_pfn(pte_t pte)
137{
138 return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT;
139}
140
141static inline unsigned long pmd_pfn(pmd_t pmd)
142{
143 return (pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT;
144}
145
146static inline unsigned long pud_pfn(pud_t pud)
147{
148 return (pud_val(pud) & PTE_PFN_MASK) >> PAGE_SHIFT;
149}
150
151#define pte_page(pte) pfn_to_page(pte_pfn(pte))
152
153static inline int pmd_large(pmd_t pte)
154{
155 return pmd_flags(pte) & _PAGE_PSE;
156}
157
158#ifdef CONFIG_TRANSPARENT_HUGEPAGE
159static inline int pmd_trans_splitting(pmd_t pmd)
160{
161 return pmd_val(pmd) & _PAGE_SPLITTING;
162}
163
164static inline int pmd_trans_huge(pmd_t pmd)
165{
166 return pmd_val(pmd) & _PAGE_PSE;
167}
168
169static inline int has_transparent_hugepage(void)
170{
171 return cpu_has_pse;
172}
173#endif
174
175static inline pte_t pte_set_flags(pte_t pte, pteval_t set)
176{
177 pteval_t v = native_pte_val(pte);
178
179 return native_make_pte(v | set);
180}
181
182static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear)
183{
184 pteval_t v = native_pte_val(pte);
185
186 return native_make_pte(v & ~clear);
187}
188
189static inline pte_t pte_mkclean(pte_t pte)
190{
191 return pte_clear_flags(pte, _PAGE_DIRTY);
192}
193
194static inline pte_t pte_mkold(pte_t pte)
195{
196 return pte_clear_flags(pte, _PAGE_ACCESSED);
197}
198
199static inline pte_t pte_wrprotect(pte_t pte)
200{
201 return pte_clear_flags(pte, _PAGE_RW);
202}
203
204static inline pte_t pte_mkexec(pte_t pte)
205{
206 return pte_clear_flags(pte, _PAGE_NX);
207}
208
209static inline pte_t pte_mkdirty(pte_t pte)
210{
211 return pte_set_flags(pte, _PAGE_DIRTY | _PAGE_SOFT_DIRTY);
212}
213
214static inline pte_t pte_mkyoung(pte_t pte)
215{
216 return pte_set_flags(pte, _PAGE_ACCESSED);
217}
218
219static inline pte_t pte_mkwrite(pte_t pte)
220{
221 return pte_set_flags(pte, _PAGE_RW);
222}
223
224static inline pte_t pte_mkhuge(pte_t pte)
225{
226 return pte_set_flags(pte, _PAGE_PSE);
227}
228
229static inline pte_t pte_clrhuge(pte_t pte)
230{
231 return pte_clear_flags(pte, _PAGE_PSE);
232}
233
234static inline pte_t pte_mkglobal(pte_t pte)
235{
236 return pte_set_flags(pte, _PAGE_GLOBAL);
237}
238
239static inline pte_t pte_clrglobal(pte_t pte)
240{
241 return pte_clear_flags(pte, _PAGE_GLOBAL);
242}
243
244static inline pte_t pte_mkspecial(pte_t pte)
245{
246 return pte_set_flags(pte, _PAGE_SPECIAL);
247}
248
249static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set)
250{
251 pmdval_t v = native_pmd_val(pmd);
252
253 return __pmd(v | set);
254}
255
256static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear)
257{
258 pmdval_t v = native_pmd_val(pmd);
259
260 return __pmd(v & ~clear);
261}
262
263static inline pmd_t pmd_mkold(pmd_t pmd)
264{
265 return pmd_clear_flags(pmd, _PAGE_ACCESSED);
266}
267
268static inline pmd_t pmd_wrprotect(pmd_t pmd)
269{
270 return pmd_clear_flags(pmd, _PAGE_RW);
271}
272
273static inline pmd_t pmd_mkdirty(pmd_t pmd)
274{
275 return pmd_set_flags(pmd, _PAGE_DIRTY | _PAGE_SOFT_DIRTY);
276}
277
278static inline pmd_t pmd_mkhuge(pmd_t pmd)
279{
280 return pmd_set_flags(pmd, _PAGE_PSE);
281}
282
283static inline pmd_t pmd_mkyoung(pmd_t pmd)
284{
285 return pmd_set_flags(pmd, _PAGE_ACCESSED);
286}
287
288static inline pmd_t pmd_mkwrite(pmd_t pmd)
289{
290 return pmd_set_flags(pmd, _PAGE_RW);
291}
292
293static inline pmd_t pmd_mknotpresent(pmd_t pmd)
294{
295 return pmd_clear_flags(pmd, _PAGE_PRESENT);
296}
297
298static inline int pte_soft_dirty(pte_t pte)
299{
300 return pte_flags(pte) & _PAGE_SOFT_DIRTY;
301}
302
303static inline int pmd_soft_dirty(pmd_t pmd)
304{
305 return pmd_flags(pmd) & _PAGE_SOFT_DIRTY;
306}
307
308static inline pte_t pte_mksoft_dirty(pte_t pte)
309{
310 return pte_set_flags(pte, _PAGE_SOFT_DIRTY);
311}
312
313static inline pmd_t pmd_mksoft_dirty(pmd_t pmd)
314{
315 return pmd_set_flags(pmd, _PAGE_SOFT_DIRTY);
316}
317
318static inline pte_t pte_file_clear_soft_dirty(pte_t pte)
319{
320 return pte_clear_flags(pte, _PAGE_SOFT_DIRTY);
321}
322
323static inline pte_t pte_file_mksoft_dirty(pte_t pte)
324{
325 return pte_set_flags(pte, _PAGE_SOFT_DIRTY);
326}
327
328static inline int pte_file_soft_dirty(pte_t pte)
329{
330 return pte_flags(pte) & _PAGE_SOFT_DIRTY;
331}
332
333
334
335
336
337static inline pgprotval_t massage_pgprot(pgprot_t pgprot)
338{
339 pgprotval_t protval = pgprot_val(pgprot);
340
341 if (protval & _PAGE_PRESENT)
342 protval &= __supported_pte_mask;
343
344 return protval;
345}
346
347static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
348{
349 return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) |
350 massage_pgprot(pgprot));
351}
352
353static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
354{
355 return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) |
356 massage_pgprot(pgprot));
357}
358
359static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
360{
361 pteval_t val = pte_val(pte);
362
363
364
365
366
367 val &= _PAGE_CHG_MASK;
368 val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK;
369
370 return __pte(val);
371}
372
373static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
374{
375 pmdval_t val = pmd_val(pmd);
376
377 val &= _HPAGE_CHG_MASK;
378 val |= massage_pgprot(newprot) & ~_HPAGE_CHG_MASK;
379
380 return __pmd(val);
381}
382
383
384#define pgprot_modify pgprot_modify
385static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot)
386{
387 pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK;
388 pgprotval_t addbits = pgprot_val(newprot);
389 return __pgprot(preservebits | addbits);
390}
391
392#define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK)
393
394#define canon_pgprot(p) __pgprot(massage_pgprot(p))
395
396static inline int is_new_memtype_allowed(u64 paddr, unsigned long size,
397 unsigned long flags,
398 unsigned long new_flags)
399{
400
401
402
403 if (x86_platform.is_untracked_pat_range(paddr, paddr + size))
404 return 1;
405
406
407
408
409
410
411
412 if ((flags == _PAGE_CACHE_UC_MINUS &&
413 new_flags == _PAGE_CACHE_WB) ||
414 (flags == _PAGE_CACHE_WC &&
415 new_flags == _PAGE_CACHE_WB)) {
416 return 0;
417 }
418
419 return 1;
420}
421
422pmd_t *populate_extra_pmd(unsigned long vaddr);
423pte_t *populate_extra_pte(unsigned long vaddr);
424#endif
425
426#ifdef CONFIG_X86_32
427# include <asm/pgtable_32.h>
428#else
429# include <asm/pgtable_64.h>
430#endif
431
432#ifndef __ASSEMBLY__
433#include <linux/mm_types.h>
434#include <linux/mmdebug.h>
435#include <linux/log2.h>
436
437static inline int pte_none(pte_t pte)
438{
439 return !pte.pte;
440}
441
442#define __HAVE_ARCH_PTE_SAME
443static inline int pte_same(pte_t a, pte_t b)
444{
445 return a.pte == b.pte;
446}
447
448static inline int pte_present(pte_t a)
449{
450 return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE |
451 _PAGE_NUMA);
452}
453
454#define pte_accessible pte_accessible
455static inline bool pte_accessible(struct mm_struct *mm, pte_t a)
456{
457 if (pte_flags(a) & _PAGE_PRESENT)
458 return true;
459
460 if ((pte_flags(a) & (_PAGE_PROTNONE | _PAGE_NUMA)) &&
461 mm_tlb_flush_pending(mm))
462 return true;
463
464 return false;
465}
466
467static inline int pte_hidden(pte_t pte)
468{
469 return pte_flags(pte) & _PAGE_HIDDEN;
470}
471
472static inline int pmd_present(pmd_t pmd)
473{
474
475
476
477
478
479
480 return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE |
481 _PAGE_NUMA);
482}
483
484static inline int pmd_none(pmd_t pmd)
485{
486
487
488 return (unsigned long)native_pmd_val(pmd) == 0;
489}
490
491static inline unsigned long pmd_page_vaddr(pmd_t pmd)
492{
493 return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK);
494}
495
496
497
498
499
500#define pmd_page(pmd) pfn_to_page((pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT)
501
502
503
504
505
506
507
508static inline unsigned long pmd_index(unsigned long address)
509{
510 return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
511}
512
513
514
515
516
517
518
519
520#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
521
522
523
524
525
526
527
528static inline unsigned long pte_index(unsigned long address)
529{
530 return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);
531}
532
533static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address)
534{
535 return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address);
536}
537
538static inline int pmd_bad(pmd_t pmd)
539{
540#ifdef CONFIG_NUMA_BALANCING
541
542 if ((pmd_flags(pmd) & (_PAGE_NUMA|_PAGE_PRESENT)) == _PAGE_NUMA)
543 return 0;
544#endif
545 return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE;
546}
547
548static inline unsigned long pages_to_mb(unsigned long npg)
549{
550 return npg >> (20 - PAGE_SHIFT);
551}
552
553#if PAGETABLE_LEVELS > 2
554static inline int pud_none(pud_t pud)
555{
556 return native_pud_val(pud) == 0;
557}
558
559static inline int pud_present(pud_t pud)
560{
561 return pud_flags(pud) & _PAGE_PRESENT;
562}
563
564static inline unsigned long pud_page_vaddr(pud_t pud)
565{
566 return (unsigned long)__va((unsigned long)pud_val(pud) & PTE_PFN_MASK);
567}
568
569
570
571
572
573#define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT)
574
575
576static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
577{
578 return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
579}
580
581static inline int pud_large(pud_t pud)
582{
583 return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) ==
584 (_PAGE_PSE | _PAGE_PRESENT);
585}
586
587static inline int pud_bad(pud_t pud)
588{
589 return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0;
590}
591#else
592static inline int pud_large(pud_t pud)
593{
594 return 0;
595}
596#endif
597
598#if PAGETABLE_LEVELS > 3
599static inline int pgd_present(pgd_t pgd)
600{
601 return pgd_flags(pgd) & _PAGE_PRESENT;
602}
603
604static inline unsigned long pgd_page_vaddr(pgd_t pgd)
605{
606 return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK);
607}
608
609
610
611
612
613#define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT)
614
615
616static inline unsigned long pud_index(unsigned long address)
617{
618 return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1);
619}
620
621static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address)
622{
623 return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address);
624}
625
626static inline int pgd_bad(pgd_t pgd)
627{
628 return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE;
629}
630
631static inline int pgd_none(pgd_t pgd)
632{
633 return !native_pgd_val(pgd);
634}
635#endif
636
637#endif
638
639
640
641
642
643
644
645#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
646
647
648
649
650
651#define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address)))
652
653
654
655
656#define pgd_offset_k(address) pgd_offset(&init_mm, (address))
657
658
659#define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET)
660#define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY)
661
662#ifndef __ASSEMBLY__
663
664extern int direct_gbpages;
665void init_mem_mapping(void);
666void early_alloc_pgt_buf(void);
667
668
669static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
670{
671 pte_t res = *ptep;
672
673
674 native_pte_clear(NULL, 0, ptep);
675 return res;
676}
677
678static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp)
679{
680 pmd_t res = *pmdp;
681
682 native_pmd_clear(pmdp);
683 return res;
684}
685
686static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr,
687 pte_t *ptep , pte_t pte)
688{
689 native_set_pte(ptep, pte);
690}
691
692static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr,
693 pmd_t *pmdp , pmd_t pmd)
694{
695 native_set_pmd(pmdp, pmd);
696}
697
698#ifndef CONFIG_PARAVIRT
699
700
701
702
703
704
705
706
707
708
709
710
711
712#define pte_update(mm, addr, ptep) do { } while (0)
713#define pte_update_defer(mm, addr, ptep) do { } while (0)
714#endif
715
716
717
718
719
720
721
722
723struct vm_area_struct;
724
725#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
726extern int ptep_set_access_flags(struct vm_area_struct *vma,
727 unsigned long address, pte_t *ptep,
728 pte_t entry, int dirty);
729
730#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
731extern int ptep_test_and_clear_young(struct vm_area_struct *vma,
732 unsigned long addr, pte_t *ptep);
733
734#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
735extern int ptep_clear_flush_young(struct vm_area_struct *vma,
736 unsigned long address, pte_t *ptep);
737
738#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
739static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
740 pte_t *ptep)
741{
742 pte_t pte = native_ptep_get_and_clear(ptep);
743 pte_update(mm, addr, ptep);
744 return pte;
745}
746
747#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
748static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
749 unsigned long addr, pte_t *ptep,
750 int full)
751{
752 pte_t pte;
753 if (full) {
754
755
756
757
758 pte = native_local_ptep_get_and_clear(ptep);
759 } else {
760 pte = ptep_get_and_clear(mm, addr, ptep);
761 }
762 return pte;
763}
764
765#define __HAVE_ARCH_PTEP_SET_WRPROTECT
766static inline void ptep_set_wrprotect(struct mm_struct *mm,
767 unsigned long addr, pte_t *ptep)
768{
769 clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte);
770 pte_update(mm, addr, ptep);
771}
772
773#define flush_tlb_fix_spurious_fault(vma, address) do { } while (0)
774
775#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
776
777#define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
778extern int pmdp_set_access_flags(struct vm_area_struct *vma,
779 unsigned long address, pmd_t *pmdp,
780 pmd_t entry, int dirty);
781
782#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
783extern int pmdp_test_and_clear_young(struct vm_area_struct *vma,
784 unsigned long addr, pmd_t *pmdp);
785
786#define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
787extern int pmdp_clear_flush_young(struct vm_area_struct *vma,
788 unsigned long address, pmd_t *pmdp);
789
790
791#define __HAVE_ARCH_PMDP_SPLITTING_FLUSH
792extern void pmdp_splitting_flush(struct vm_area_struct *vma,
793 unsigned long addr, pmd_t *pmdp);
794
795#define __HAVE_ARCH_PMD_WRITE
796static inline int pmd_write(pmd_t pmd)
797{
798 return pmd_flags(pmd) & _PAGE_RW;
799}
800
801#define __HAVE_ARCH_PMDP_GET_AND_CLEAR
802static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, unsigned long addr,
803 pmd_t *pmdp)
804{
805 pmd_t pmd = native_pmdp_get_and_clear(pmdp);
806 pmd_update(mm, addr, pmdp);
807 return pmd;
808}
809
810#define __HAVE_ARCH_PMDP_SET_WRPROTECT
811static inline void pmdp_set_wrprotect(struct mm_struct *mm,
812 unsigned long addr, pmd_t *pmdp)
813{
814 clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp);
815 pmd_update(mm, addr, pmdp);
816}
817
818
819
820
821
822
823
824
825
826
827
828static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
829{
830 memcpy(dst, src, count * sizeof(pgd_t));
831}
832
833#define PTE_SHIFT ilog2(PTRS_PER_PTE)
834static inline int page_level_shift(enum pg_level level)
835{
836 return (PAGE_SHIFT - PTE_SHIFT) + level * PTE_SHIFT;
837}
838static inline unsigned long page_level_size(enum pg_level level)
839{
840 return 1UL << page_level_shift(level);
841}
842static inline unsigned long page_level_mask(enum pg_level level)
843{
844 return ~(page_level_size(level) - 1);
845}
846
847
848
849
850
851static inline void update_mmu_cache(struct vm_area_struct *vma,
852 unsigned long addr, pte_t *ptep)
853{
854}
855static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,
856 unsigned long addr, pmd_t *pmd)
857{
858}
859
860static inline pte_t pte_swp_mksoft_dirty(pte_t pte)
861{
862 VM_BUG_ON(pte_present(pte));
863 return pte_set_flags(pte, _PAGE_SWP_SOFT_DIRTY);
864}
865
866static inline int pte_swp_soft_dirty(pte_t pte)
867{
868 VM_BUG_ON(pte_present(pte));
869 return pte_flags(pte) & _PAGE_SWP_SOFT_DIRTY;
870}
871
872static inline pte_t pte_swp_clear_soft_dirty(pte_t pte)
873{
874 VM_BUG_ON(pte_present(pte));
875 return pte_clear_flags(pte, _PAGE_SWP_SOFT_DIRTY);
876}
877
878#include <asm-generic/pgtable.h>
879#endif
880
881#endif
882