1
2#ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_H_
3#define _ASM_POWERPC_BOOK3S_64_PGTABLE_H_
4
5#include <asm-generic/5level-fixup.h>
6
7#ifndef __ASSEMBLY__
8#include <linux/mmdebug.h>
9#include <linux/bug.h>
10#endif
11
12
13
14
15#define _PAGE_BIT_SWAP_TYPE 0
16
17#define _PAGE_NA 0
18#define _PAGE_RO 0
19#define _PAGE_USER 0
20
21#define _PAGE_EXEC 0x00001
22#define _PAGE_WRITE 0x00002
23#define _PAGE_READ 0x00004
24#define _PAGE_RW (_PAGE_READ | _PAGE_WRITE)
25#define _PAGE_RWX (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)
26#define _PAGE_PRIVILEGED 0x00008
27#define _PAGE_SAO 0x00010
28#define _PAGE_NON_IDEMPOTENT 0x00020
29#define _PAGE_TOLERANT 0x00030
30#define _PAGE_DIRTY 0x00080
31#define _PAGE_ACCESSED 0x00100
32
33
34
35#define _RPAGE_SW0 0x2000000000000000UL
36#define _RPAGE_SW1 0x00800
37#define _RPAGE_SW2 0x00400
38#define _RPAGE_SW3 0x00200
39#define _RPAGE_RSV1 0x1000000000000000UL
40#define _RPAGE_RSV2 0x0800000000000000UL
41#define _RPAGE_RSV3 0x0400000000000000UL
42#define _RPAGE_RSV4 0x0200000000000000UL
43#define _RPAGE_RSV5 0x00040UL
44
45#define _PAGE_PTE 0x4000000000000000UL
46#define _PAGE_PRESENT 0x8000000000000000UL
47
48
49
50
51
52
53#define _RPAGE_RPN0 0x01000
54#define _RPAGE_RPN1 0x02000
55#define _RPAGE_RPN44 0x0100000000000000UL
56#define _RPAGE_RPN43 0x0080000000000000UL
57#define _RPAGE_RPN42 0x0040000000000000UL
58#define _RPAGE_RPN41 0x0020000000000000UL
59
60
61#define _RPAGE_PA_MAX 57
62
63#ifdef CONFIG_PPC_MEM_KEYS
64#ifdef CONFIG_PPC_64K_PAGES
65#define H_PTE_PKEY_BIT0 _RPAGE_RSV1
66#define H_PTE_PKEY_BIT1 _RPAGE_RSV2
67#else
68#define H_PTE_PKEY_BIT0 0
69#define H_PTE_PKEY_BIT1 0
70#endif
71#define H_PTE_PKEY_BIT2 _RPAGE_RSV3
72#define H_PTE_PKEY_BIT3 _RPAGE_RSV4
73#define H_PTE_PKEY_BIT4 _RPAGE_RSV5
74#else
75#define H_PTE_PKEY_BIT0 0
76#define H_PTE_PKEY_BIT1 0
77#define H_PTE_PKEY_BIT2 0
78#define H_PTE_PKEY_BIT3 0
79#define H_PTE_PKEY_BIT4 0
80#endif
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101#define _PAGE_PA_MAX 53
102
103#define _PAGE_SOFT_DIRTY _RPAGE_SW3
104#define _PAGE_SPECIAL _RPAGE_SW2
105#define _PAGE_DEVMAP _RPAGE_SW1
106#define __HAVE_ARCH_PTE_DEVMAP
107
108
109
110
111
112
113#define _PAGE_NO_CACHE _PAGE_TOLERANT
114
115
116
117
118
119#define PTE_RPN_MASK (((1UL << _PAGE_PA_MAX) - 1) & (PAGE_MASK))
120
121
122
123
124#define _HPAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_HPTEFLAGS | _PAGE_DIRTY | \
125 _PAGE_ACCESSED | H_PAGE_THP_HUGE | _PAGE_PTE | \
126 _PAGE_SOFT_DIRTY)
127
128
129
130#define _PAGE_KERNEL_RW (_PAGE_PRIVILEGED | _PAGE_RW | _PAGE_DIRTY)
131#define _PAGE_KERNEL_RO (_PAGE_PRIVILEGED | _PAGE_READ)
132#define _PAGE_KERNEL_RWX (_PAGE_PRIVILEGED | _PAGE_DIRTY | \
133 _PAGE_RW | _PAGE_EXEC)
134
135
136
137#define _PAGE_PSIZE 0
138
139
140
141
142#define _PAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_HPTEFLAGS | _PAGE_DIRTY | \
143 _PAGE_ACCESSED | _PAGE_SPECIAL | _PAGE_PTE | \
144 _PAGE_SOFT_DIRTY)
145
146#define H_PTE_PKEY (H_PTE_PKEY_BIT0 | H_PTE_PKEY_BIT1 | H_PTE_PKEY_BIT2 | \
147 H_PTE_PKEY_BIT3 | H_PTE_PKEY_BIT4)
148
149
150
151#define PAGE_PROT_BITS (_PAGE_SAO | _PAGE_NON_IDEMPOTENT | _PAGE_TOLERANT | \
152 H_PAGE_4K_PFN | _PAGE_PRIVILEGED | _PAGE_ACCESSED | \
153 _PAGE_READ | _PAGE_WRITE | _PAGE_DIRTY | _PAGE_EXEC | \
154 _PAGE_SOFT_DIRTY | H_PTE_PKEY)
155
156
157
158
159
160
161#define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_PSIZE)
162#define _PAGE_BASE (_PAGE_BASE_NC)
163
164
165
166
167
168
169
170
171
172
173
174#define PAGE_NONE __pgprot(_PAGE_BASE | _PAGE_PRIVILEGED)
175#define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_RW)
176#define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_RW | _PAGE_EXEC)
177#define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_READ)
178#define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_EXEC)
179#define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_READ)
180#define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_EXEC)
181
182#define __P000 PAGE_NONE
183#define __P001 PAGE_READONLY
184#define __P010 PAGE_COPY
185#define __P011 PAGE_COPY
186#define __P100 PAGE_READONLY_X
187#define __P101 PAGE_READONLY_X
188#define __P110 PAGE_COPY_X
189#define __P111 PAGE_COPY_X
190
191#define __S000 PAGE_NONE
192#define __S001 PAGE_READONLY
193#define __S010 PAGE_SHARED
194#define __S011 PAGE_SHARED
195#define __S100 PAGE_READONLY_X
196#define __S101 PAGE_READONLY_X
197#define __S110 PAGE_SHARED_X
198#define __S111 PAGE_SHARED_X
199
200
201#define PAGE_KERNEL __pgprot(_PAGE_BASE | _PAGE_KERNEL_RW)
202#define PAGE_KERNEL_NC __pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \
203 _PAGE_TOLERANT)
204#define PAGE_KERNEL_NCG __pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \
205 _PAGE_NON_IDEMPOTENT)
206#define PAGE_KERNEL_X __pgprot(_PAGE_BASE | _PAGE_KERNEL_RWX)
207#define PAGE_KERNEL_RO __pgprot(_PAGE_BASE | _PAGE_KERNEL_RO)
208#define PAGE_KERNEL_ROX __pgprot(_PAGE_BASE | _PAGE_KERNEL_ROX)
209
210
211
212
213
214
215#if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH) || \
216 defined(CONFIG_KPROBES) || defined(CONFIG_DYNAMIC_FTRACE)
217#define PAGE_KERNEL_TEXT PAGE_KERNEL_X
218#else
219#define PAGE_KERNEL_TEXT PAGE_KERNEL_ROX
220#endif
221
222
223#define PAGE_KERNEL_EXEC PAGE_KERNEL_X
224#define PAGE_AGP (PAGE_KERNEL_NC)
225
226#ifndef __ASSEMBLY__
227
228
229
230extern unsigned long __pte_index_size;
231extern unsigned long __pmd_index_size;
232extern unsigned long __pud_index_size;
233extern unsigned long __pgd_index_size;
234extern unsigned long __pmd_cache_index;
235extern unsigned long __pud_cache_index;
236#define PTE_INDEX_SIZE __pte_index_size
237#define PMD_INDEX_SIZE __pmd_index_size
238#define PUD_INDEX_SIZE __pud_index_size
239#define PGD_INDEX_SIZE __pgd_index_size
240#define PMD_CACHE_INDEX __pmd_cache_index
241#define PUD_CACHE_INDEX __pud_cache_index
242
243
244
245
246extern unsigned long __pte_table_size;
247extern unsigned long __pmd_table_size;
248extern unsigned long __pud_table_size;
249extern unsigned long __pgd_table_size;
250#define PTE_TABLE_SIZE __pte_table_size
251#define PMD_TABLE_SIZE __pmd_table_size
252#define PUD_TABLE_SIZE __pud_table_size
253#define PGD_TABLE_SIZE __pgd_table_size
254
255extern unsigned long __pmd_val_bits;
256extern unsigned long __pud_val_bits;
257extern unsigned long __pgd_val_bits;
258#define PMD_VAL_BITS __pmd_val_bits
259#define PUD_VAL_BITS __pud_val_bits
260#define PGD_VAL_BITS __pgd_val_bits
261
262extern unsigned long __pte_frag_nr;
263#define PTE_FRAG_NR __pte_frag_nr
264extern unsigned long __pte_frag_size_shift;
265#define PTE_FRAG_SIZE_SHIFT __pte_frag_size_shift
266#define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT)
267
268#define PTRS_PER_PTE (1 << PTE_INDEX_SIZE)
269#define PTRS_PER_PMD (1 << PMD_INDEX_SIZE)
270#define PTRS_PER_PUD (1 << PUD_INDEX_SIZE)
271#define PTRS_PER_PGD (1 << PGD_INDEX_SIZE)
272
273
274#define PMD_SHIFT (PAGE_SHIFT + PTE_INDEX_SIZE)
275#define PMD_SIZE (1UL << PMD_SHIFT)
276#define PMD_MASK (~(PMD_SIZE-1))
277
278
279#define PUD_SHIFT (PMD_SHIFT + PMD_INDEX_SIZE)
280#define PUD_SIZE (1UL << PUD_SHIFT)
281#define PUD_MASK (~(PUD_SIZE-1))
282
283
284#define PGDIR_SHIFT (PUD_SHIFT + PUD_INDEX_SIZE)
285#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
286#define PGDIR_MASK (~(PGDIR_SIZE-1))
287
288
289#define PMD_MASKED_BITS 0xc0000000000000ffUL
290
291#define PUD_MASKED_BITS 0xc0000000000000ffUL
292
293#define PGD_MASKED_BITS 0xc0000000000000ffUL
294
295extern unsigned long __vmalloc_start;
296extern unsigned long __vmalloc_end;
297#define VMALLOC_START __vmalloc_start
298#define VMALLOC_END __vmalloc_end
299
300extern unsigned long __kernel_virt_start;
301extern unsigned long __kernel_virt_size;
302extern unsigned long __kernel_io_start;
303#define KERN_VIRT_START __kernel_virt_start
304#define KERN_VIRT_SIZE __kernel_virt_size
305#define KERN_IO_START __kernel_io_start
306extern struct page *vmemmap;
307extern unsigned long ioremap_bot;
308extern unsigned long pci_io_base;
309#endif
310
311#include <asm/book3s/64/hash.h>
312#include <asm/book3s/64/radix.h>
313
314#ifdef CONFIG_PPC_64K_PAGES
315#include <asm/book3s/64/pgtable-64k.h>
316#else
317#include <asm/book3s/64/pgtable-4k.h>
318#endif
319
320#include <asm/barrier.h>
321
322
323
324
325
326
327
328
329
330#define FULL_IO_SIZE 0x80000000ul
331#define ISA_IO_BASE (KERN_IO_START)
332#define ISA_IO_END (KERN_IO_START + 0x10000ul)
333#define PHB_IO_BASE (ISA_IO_END)
334#define PHB_IO_END (KERN_IO_START + FULL_IO_SIZE)
335#define IOREMAP_BASE (PHB_IO_END)
336#define IOREMAP_END (KERN_VIRT_START + KERN_VIRT_SIZE)
337
338
339#define HAVE_PAGE_AGP
340
341
342#define __HAVE_ARCH_PTE_SPECIAL
343
344#ifndef __ASSEMBLY__
345
346
347
348
349
350
351#ifndef __real_pte
352
353#define __real_pte(e, p, o) ((real_pte_t){(e)})
354#define __rpte_to_pte(r) ((r).pte)
355#define __rpte_to_hidx(r,index) (pte_val(__rpte_to_pte(r)) >> H_PAGE_F_GIX_SHIFT)
356
357#define pte_iterate_hashed_subpages(rpte, psize, va, index, shift) \
358 do { \
359 index = 0; \
360 shift = mmu_psize_defs[psize].shift; \
361
362#define pte_iterate_hashed_end() } while(0)
363
364
365
366
367
368#define pte_pagesize_index(mm, addr, pte) MMU_PAGE_4K
369
370#endif
371
372static inline unsigned long pte_update(struct mm_struct *mm, unsigned long addr,
373 pte_t *ptep, unsigned long clr,
374 unsigned long set, int huge)
375{
376 if (radix_enabled())
377 return radix__pte_update(mm, addr, ptep, clr, set, huge);
378 return hash__pte_update(mm, addr, ptep, clr, set, huge);
379}
380
381
382
383
384
385
386
387
388
389
390static inline int __ptep_test_and_clear_young(struct mm_struct *mm,
391 unsigned long addr, pte_t *ptep)
392{
393 unsigned long old;
394
395 if ((pte_raw(*ptep) & cpu_to_be64(_PAGE_ACCESSED | H_PAGE_HASHPTE)) == 0)
396 return 0;
397 old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0, 0);
398 return (old & _PAGE_ACCESSED) != 0;
399}
400
401#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
402#define ptep_test_and_clear_young(__vma, __addr, __ptep) \
403({ \
404 int __r; \
405 __r = __ptep_test_and_clear_young((__vma)->vm_mm, __addr, __ptep); \
406 __r; \
407})
408
409static inline int __pte_write(pte_t pte)
410{
411 return !!(pte_raw(pte) & cpu_to_be64(_PAGE_WRITE));
412}
413
414#ifdef CONFIG_NUMA_BALANCING
415#define pte_savedwrite pte_savedwrite
416static inline bool pte_savedwrite(pte_t pte)
417{
418
419
420
421
422
423
424
425 return !(pte_raw(pte) & cpu_to_be64(_PAGE_RWX | _PAGE_PRIVILEGED));
426}
427#else
428#define pte_savedwrite pte_savedwrite
429static inline bool pte_savedwrite(pte_t pte)
430{
431 return false;
432}
433#endif
434
435static inline int pte_write(pte_t pte)
436{
437 return __pte_write(pte) || pte_savedwrite(pte);
438}
439
440static inline int pte_read(pte_t pte)
441{
442 return !!(pte_raw(pte) & cpu_to_be64(_PAGE_READ));
443}
444
445#define __HAVE_ARCH_PTEP_SET_WRPROTECT
446static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
447 pte_t *ptep)
448{
449 if (__pte_write(*ptep))
450 pte_update(mm, addr, ptep, _PAGE_WRITE, 0, 0);
451 else if (unlikely(pte_savedwrite(*ptep)))
452 pte_update(mm, addr, ptep, 0, _PAGE_PRIVILEGED, 0);
453}
454
455static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
456 unsigned long addr, pte_t *ptep)
457{
458
459
460
461
462 if (__pte_write(*ptep))
463 pte_update(mm, addr, ptep, _PAGE_WRITE, 0, 1);
464 else if (unlikely(pte_savedwrite(*ptep)))
465 pte_update(mm, addr, ptep, 0, _PAGE_PRIVILEGED, 1);
466}
467
468#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
469static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
470 unsigned long addr, pte_t *ptep)
471{
472 unsigned long old = pte_update(mm, addr, ptep, ~0UL, 0, 0);
473 return __pte(old);
474}
475
476#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
477static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
478 unsigned long addr,
479 pte_t *ptep, int full)
480{
481 if (full && radix_enabled()) {
482
483
484
485
486
487 return radix__ptep_get_and_clear_full(mm, addr, ptep, full);
488 }
489 return ptep_get_and_clear(mm, addr, ptep);
490}
491
492
493static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
494 pte_t * ptep)
495{
496 pte_update(mm, addr, ptep, ~0UL, 0, 0);
497}
498
499static inline int pte_dirty(pte_t pte)
500{
501 return !!(pte_raw(pte) & cpu_to_be64(_PAGE_DIRTY));
502}
503
504static inline int pte_young(pte_t pte)
505{
506 return !!(pte_raw(pte) & cpu_to_be64(_PAGE_ACCESSED));
507}
508
509static inline int pte_special(pte_t pte)
510{
511 return !!(pte_raw(pte) & cpu_to_be64(_PAGE_SPECIAL));
512}
513
514static inline pgprot_t pte_pgprot(pte_t pte) { return __pgprot(pte_val(pte) & PAGE_PROT_BITS); }
515
516#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY
517static inline bool pte_soft_dirty(pte_t pte)
518{
519 return !!(pte_raw(pte) & cpu_to_be64(_PAGE_SOFT_DIRTY));
520}
521
522static inline pte_t pte_mksoft_dirty(pte_t pte)
523{
524 return __pte(pte_val(pte) | _PAGE_SOFT_DIRTY);
525}
526
527static inline pte_t pte_clear_soft_dirty(pte_t pte)
528{
529 return __pte(pte_val(pte) & ~_PAGE_SOFT_DIRTY);
530}
531#endif
532
533#ifdef CONFIG_NUMA_BALANCING
534static inline int pte_protnone(pte_t pte)
535{
536 return (pte_raw(pte) & cpu_to_be64(_PAGE_PRESENT | _PAGE_PTE | _PAGE_RWX)) ==
537 cpu_to_be64(_PAGE_PRESENT | _PAGE_PTE);
538}
539
540#define pte_mk_savedwrite pte_mk_savedwrite
541static inline pte_t pte_mk_savedwrite(pte_t pte)
542{
543
544
545
546
547
548 VM_BUG_ON((pte_raw(pte) & cpu_to_be64(_PAGE_PRESENT | _PAGE_RWX | _PAGE_PRIVILEGED)) !=
549 cpu_to_be64(_PAGE_PRESENT | _PAGE_PRIVILEGED));
550 return __pte(pte_val(pte) & ~_PAGE_PRIVILEGED);
551}
552
553#define pte_clear_savedwrite pte_clear_savedwrite
554static inline pte_t pte_clear_savedwrite(pte_t pte)
555{
556
557
558
559 VM_BUG_ON(!pte_protnone(pte));
560 return __pte(pte_val(pte) | _PAGE_PRIVILEGED);
561}
562#else
563#define pte_clear_savedwrite pte_clear_savedwrite
564static inline pte_t pte_clear_savedwrite(pte_t pte)
565{
566 VM_WARN_ON(1);
567 return __pte(pte_val(pte) & ~_PAGE_WRITE);
568}
569#endif
570
571static inline int pte_present(pte_t pte)
572{
573 return !!(pte_raw(pte) & cpu_to_be64(_PAGE_PRESENT));
574}
575
576#ifdef CONFIG_PPC_MEM_KEYS
577extern bool arch_pte_access_permitted(u64 pte, bool write, bool execute);
578#else
579static inline bool arch_pte_access_permitted(u64 pte, bool write, bool execute)
580{
581 return true;
582}
583#endif
584
585#define pte_access_permitted pte_access_permitted
586static inline bool pte_access_permitted(pte_t pte, bool write)
587{
588 unsigned long pteval = pte_val(pte);
589
590 unsigned long clear_pte_bits = _PAGE_PRIVILEGED;
591
592
593
594
595 unsigned long need_pte_bits = _PAGE_PRESENT | _PAGE_READ;
596
597 if (write)
598 need_pte_bits |= _PAGE_WRITE;
599
600 if ((pteval & need_pte_bits) != need_pte_bits)
601 return false;
602
603 if ((pteval & clear_pte_bits) == clear_pte_bits)
604 return false;
605
606 return arch_pte_access_permitted(pte_val(pte), write, 0);
607}
608
609
610
611
612
613
614
615
616static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot)
617{
618 return __pte((((pte_basic_t)(pfn) << PAGE_SHIFT) & PTE_RPN_MASK) |
619 pgprot_val(pgprot));
620}
621
622static inline unsigned long pte_pfn(pte_t pte)
623{
624 return (pte_val(pte) & PTE_RPN_MASK) >> PAGE_SHIFT;
625}
626
627
628static inline pte_t pte_wrprotect(pte_t pte)
629{
630 if (unlikely(pte_savedwrite(pte)))
631 return pte_clear_savedwrite(pte);
632 return __pte(pte_val(pte) & ~_PAGE_WRITE);
633}
634
635static inline pte_t pte_mkclean(pte_t pte)
636{
637 return __pte(pte_val(pte) & ~_PAGE_DIRTY);
638}
639
640static inline pte_t pte_mkold(pte_t pte)
641{
642 return __pte(pte_val(pte) & ~_PAGE_ACCESSED);
643}
644
645static inline pte_t pte_mkwrite(pte_t pte)
646{
647
648
649
650 return __pte(pte_val(pte) | _PAGE_RW);
651}
652
653static inline pte_t pte_mkdirty(pte_t pte)
654{
655 return __pte(pte_val(pte) | _PAGE_DIRTY | _PAGE_SOFT_DIRTY);
656}
657
658static inline pte_t pte_mkyoung(pte_t pte)
659{
660 return __pte(pte_val(pte) | _PAGE_ACCESSED);
661}
662
663static inline pte_t pte_mkspecial(pte_t pte)
664{
665 return __pte(pte_val(pte) | _PAGE_SPECIAL);
666}
667
668static inline pte_t pte_mkhuge(pte_t pte)
669{
670 return pte;
671}
672
673static inline pte_t pte_mkdevmap(pte_t pte)
674{
675 return __pte(pte_val(pte) | _PAGE_SPECIAL|_PAGE_DEVMAP);
676}
677
678
679
680
681
682
683
684static inline int pte_devmap(pte_t pte)
685{
686 u64 mask = cpu_to_be64(_PAGE_DEVMAP | _PAGE_PTE);
687
688 return (pte_raw(pte) & mask) == mask;
689}
690
691static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
692{
693
694 return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
695}
696
697static inline bool pte_user(pte_t pte)
698{
699 return !(pte_raw(pte) & cpu_to_be64(_PAGE_PRIVILEGED));
700}
701
702
703#define MAX_SWAPFILES_CHECK() do { \
704 BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS); \
705
706
707
708 \
709 BUILD_BUG_ON(_PAGE_HPTEFLAGS & (0x1f << _PAGE_BIT_SWAP_TYPE)); \
710 BUILD_BUG_ON(_PAGE_HPTEFLAGS & _PAGE_SWP_SOFT_DIRTY); \
711 } while (0)
712
713
714
715#define SWP_TYPE_BITS 5
716#define __swp_type(x) (((x).val >> _PAGE_BIT_SWAP_TYPE) \
717 & ((1UL << SWP_TYPE_BITS) - 1))
718#define __swp_offset(x) (((x).val & PTE_RPN_MASK) >> PAGE_SHIFT)
719#define __swp_entry(type, offset) ((swp_entry_t) { \
720 ((type) << _PAGE_BIT_SWAP_TYPE) \
721 | (((offset) << PAGE_SHIFT) & PTE_RPN_MASK)})
722
723
724
725
726
727
728#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) & ~_PAGE_PTE })
729#define __swp_entry_to_pte(x) __pte((x).val | _PAGE_PTE)
730
731#ifdef CONFIG_MEM_SOFT_DIRTY
732#define _PAGE_SWP_SOFT_DIRTY (1UL << (SWP_TYPE_BITS + _PAGE_BIT_SWAP_TYPE))
733#else
734#define _PAGE_SWP_SOFT_DIRTY 0UL
735#endif
736
737#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY
738static inline pte_t pte_swp_mksoft_dirty(pte_t pte)
739{
740 return __pte(pte_val(pte) | _PAGE_SWP_SOFT_DIRTY);
741}
742
743static inline bool pte_swp_soft_dirty(pte_t pte)
744{
745 return !!(pte_raw(pte) & cpu_to_be64(_PAGE_SWP_SOFT_DIRTY));
746}
747
748static inline pte_t pte_swp_clear_soft_dirty(pte_t pte)
749{
750 return __pte(pte_val(pte) & ~_PAGE_SWP_SOFT_DIRTY);
751}
752#endif
753
754static inline bool check_pte_access(unsigned long access, unsigned long ptev)
755{
756
757
758
759 if (access & ~ptev)
760 return false;
761
762
763
764 if ((access & _PAGE_PRIVILEGED) != (ptev & _PAGE_PRIVILEGED))
765 return false;
766
767 return true;
768}
769
770
771
772
773static inline void __ptep_set_access_flags(struct mm_struct *mm,
774 pte_t *ptep, pte_t entry,
775 unsigned long address)
776{
777 if (radix_enabled())
778 return radix__ptep_set_access_flags(mm, ptep, entry, address);
779 return hash__ptep_set_access_flags(ptep, entry);
780}
781
782#define __HAVE_ARCH_PTE_SAME
783static inline int pte_same(pte_t pte_a, pte_t pte_b)
784{
785 if (radix_enabled())
786 return radix__pte_same(pte_a, pte_b);
787 return hash__pte_same(pte_a, pte_b);
788}
789
790static inline int pte_none(pte_t pte)
791{
792 if (radix_enabled())
793 return radix__pte_none(pte);
794 return hash__pte_none(pte);
795}
796
797static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
798 pte_t *ptep, pte_t pte, int percpu)
799{
800 if (radix_enabled())
801 return radix__set_pte_at(mm, addr, ptep, pte, percpu);
802 return hash__set_pte_at(mm, addr, ptep, pte, percpu);
803}
804
805#define _PAGE_CACHE_CTL (_PAGE_NON_IDEMPOTENT | _PAGE_TOLERANT)
806
807#define pgprot_noncached pgprot_noncached
808static inline pgprot_t pgprot_noncached(pgprot_t prot)
809{
810 return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
811 _PAGE_NON_IDEMPOTENT);
812}
813
814#define pgprot_noncached_wc pgprot_noncached_wc
815static inline pgprot_t pgprot_noncached_wc(pgprot_t prot)
816{
817 return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
818 _PAGE_TOLERANT);
819}
820
821#define pgprot_cached pgprot_cached
822static inline pgprot_t pgprot_cached(pgprot_t prot)
823{
824 return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL));
825}
826
827#define pgprot_writecombine pgprot_writecombine
828static inline pgprot_t pgprot_writecombine(pgprot_t prot)
829{
830 return pgprot_noncached_wc(prot);
831}
832
833
834
835static inline bool pte_ci(pte_t pte)
836{
837 unsigned long pte_v = pte_val(pte);
838
839 if (((pte_v & _PAGE_CACHE_CTL) == _PAGE_TOLERANT) ||
840 ((pte_v & _PAGE_CACHE_CTL) == _PAGE_NON_IDEMPOTENT))
841 return true;
842 return false;
843}
844
845static inline void pmd_set(pmd_t *pmdp, unsigned long val)
846{
847 *pmdp = __pmd(val);
848}
849
850static inline void pmd_clear(pmd_t *pmdp)
851{
852 *pmdp = __pmd(0);
853}
854
855static inline int pmd_none(pmd_t pmd)
856{
857 return !pmd_raw(pmd);
858}
859
860static inline int pmd_present(pmd_t pmd)
861{
862
863 return !pmd_none(pmd);
864}
865
866static inline int pmd_bad(pmd_t pmd)
867{
868 if (radix_enabled())
869 return radix__pmd_bad(pmd);
870 return hash__pmd_bad(pmd);
871}
872
873static inline void pud_set(pud_t *pudp, unsigned long val)
874{
875 *pudp = __pud(val);
876}
877
878static inline void pud_clear(pud_t *pudp)
879{
880 *pudp = __pud(0);
881}
882
883static inline int pud_none(pud_t pud)
884{
885 return !pud_raw(pud);
886}
887
888static inline int pud_present(pud_t pud)
889{
890 return !pud_none(pud);
891}
892
893extern struct page *pud_page(pud_t pud);
894extern struct page *pmd_page(pmd_t pmd);
895static inline pte_t pud_pte(pud_t pud)
896{
897 return __pte_raw(pud_raw(pud));
898}
899
900static inline pud_t pte_pud(pte_t pte)
901{
902 return __pud_raw(pte_raw(pte));
903}
904#define pud_write(pud) pte_write(pud_pte(pud))
905
906static inline int pud_bad(pud_t pud)
907{
908 if (radix_enabled())
909 return radix__pud_bad(pud);
910 return hash__pud_bad(pud);
911}
912
913#define pud_access_permitted pud_access_permitted
914static inline bool pud_access_permitted(pud_t pud, bool write)
915{
916 return pte_access_permitted(pud_pte(pud), write);
917}
918
919#define pgd_write(pgd) pte_write(pgd_pte(pgd))
920static inline void pgd_set(pgd_t *pgdp, unsigned long val)
921{
922 *pgdp = __pgd(val);
923}
924
925static inline void pgd_clear(pgd_t *pgdp)
926{
927 *pgdp = __pgd(0);
928}
929
930static inline int pgd_none(pgd_t pgd)
931{
932 return !pgd_raw(pgd);
933}
934
935static inline int pgd_present(pgd_t pgd)
936{
937 return !pgd_none(pgd);
938}
939
940static inline pte_t pgd_pte(pgd_t pgd)
941{
942 return __pte_raw(pgd_raw(pgd));
943}
944
945static inline pgd_t pte_pgd(pte_t pte)
946{
947 return __pgd_raw(pte_raw(pte));
948}
949
950static inline int pgd_bad(pgd_t pgd)
951{
952 if (radix_enabled())
953 return radix__pgd_bad(pgd);
954 return hash__pgd_bad(pgd);
955}
956
957#define pgd_access_permitted pgd_access_permitted
958static inline bool pgd_access_permitted(pgd_t pgd, bool write)
959{
960 return pte_access_permitted(pgd_pte(pgd), write);
961}
962
963extern struct page *pgd_page(pgd_t pgd);
964
965
966#define __pgtable_ptr_val(ptr) __pa(ptr)
967
968#define pmd_page_vaddr(pmd) __va(pmd_val(pmd) & ~PMD_MASKED_BITS)
969#define pud_page_vaddr(pud) __va(pud_val(pud) & ~PUD_MASKED_BITS)
970#define pgd_page_vaddr(pgd) __va(pgd_val(pgd) & ~PGD_MASKED_BITS)
971
972#define pgd_index(address) (((address) >> (PGDIR_SHIFT)) & (PTRS_PER_PGD - 1))
973#define pud_index(address) (((address) >> (PUD_SHIFT)) & (PTRS_PER_PUD - 1))
974#define pmd_index(address) (((address) >> (PMD_SHIFT)) & (PTRS_PER_PMD - 1))
975#define pte_index(address) (((address) >> (PAGE_SHIFT)) & (PTRS_PER_PTE - 1))
976
977
978
979
980
981
982#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
983
984#define pud_offset(pgdp, addr) \
985 (((pud_t *) pgd_page_vaddr(*(pgdp))) + pud_index(addr))
986#define pmd_offset(pudp,addr) \
987 (((pmd_t *) pud_page_vaddr(*(pudp))) + pmd_index(addr))
988#define pte_offset_kernel(dir,addr) \
989 (((pte_t *) pmd_page_vaddr(*(dir))) + pte_index(addr))
990
991#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr))
992#define pte_unmap(pte) do { } while(0)
993
994
995
996#define pgd_offset_k(address) pgd_offset(&init_mm, address)
997
998#define pte_ERROR(e) \
999 pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
1000#define pmd_ERROR(e) \
1001 pr_err("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
1002#define pud_ERROR(e) \
1003 pr_err("%s:%d: bad pud %08lx.\n", __FILE__, __LINE__, pud_val(e))
1004#define pgd_ERROR(e) \
1005 pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
1006
1007static inline int map_kernel_page(unsigned long ea, unsigned long pa,
1008 unsigned long flags)
1009{
1010 if (radix_enabled()) {
1011#if defined(CONFIG_PPC_RADIX_MMU) && defined(DEBUG_VM)
1012 unsigned long page_size = 1 << mmu_psize_defs[mmu_io_psize].shift;
1013 WARN((page_size != PAGE_SIZE), "I/O page size != PAGE_SIZE");
1014#endif
1015 return radix__map_kernel_page(ea, pa, __pgprot(flags), PAGE_SIZE);
1016 }
1017 return hash__map_kernel_page(ea, pa, flags);
1018}
1019
1020static inline int __meminit vmemmap_create_mapping(unsigned long start,
1021 unsigned long page_size,
1022 unsigned long phys)
1023{
1024 if (radix_enabled())
1025 return radix__vmemmap_create_mapping(start, page_size, phys);
1026 return hash__vmemmap_create_mapping(start, page_size, phys);
1027}
1028
1029#ifdef CONFIG_MEMORY_HOTPLUG
1030static inline void vmemmap_remove_mapping(unsigned long start,
1031 unsigned long page_size)
1032{
1033 if (radix_enabled())
1034 return radix__vmemmap_remove_mapping(start, page_size);
1035 return hash__vmemmap_remove_mapping(start, page_size);
1036}
1037#endif
1038struct page *realmode_pfn_to_page(unsigned long pfn);
1039
1040static inline pte_t pmd_pte(pmd_t pmd)
1041{
1042 return __pte_raw(pmd_raw(pmd));
1043}
1044
1045static inline pmd_t pte_pmd(pte_t pte)
1046{
1047 return __pmd_raw(pte_raw(pte));
1048}
1049
1050static inline pte_t *pmdp_ptep(pmd_t *pmd)
1051{
1052 return (pte_t *)pmd;
1053}
1054#define pmd_pfn(pmd) pte_pfn(pmd_pte(pmd))
1055#define pmd_dirty(pmd) pte_dirty(pmd_pte(pmd))
1056#define pmd_young(pmd) pte_young(pmd_pte(pmd))
1057#define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd)))
1058#define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd)))
1059#define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
1060#define pmd_mkclean(pmd) pte_pmd(pte_mkclean(pmd_pte(pmd)))
1061#define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
1062#define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd)))
1063#define pmd_mk_savedwrite(pmd) pte_pmd(pte_mk_savedwrite(pmd_pte(pmd)))
1064#define pmd_clear_savedwrite(pmd) pte_pmd(pte_clear_savedwrite(pmd_pte(pmd)))
1065
1066#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY
1067#define pmd_soft_dirty(pmd) pte_soft_dirty(pmd_pte(pmd))
1068#define pmd_mksoft_dirty(pmd) pte_pmd(pte_mksoft_dirty(pmd_pte(pmd)))
1069#define pmd_clear_soft_dirty(pmd) pte_pmd(pte_clear_soft_dirty(pmd_pte(pmd)))
1070#endif
1071
1072#ifdef CONFIG_NUMA_BALANCING
1073static inline int pmd_protnone(pmd_t pmd)
1074{
1075 return pte_protnone(pmd_pte(pmd));
1076}
1077#endif
1078
1079#define pmd_write(pmd) pte_write(pmd_pte(pmd))
1080#define __pmd_write(pmd) __pte_write(pmd_pte(pmd))
1081#define pmd_savedwrite(pmd) pte_savedwrite(pmd_pte(pmd))
1082
1083#define pmd_access_permitted pmd_access_permitted
1084static inline bool pmd_access_permitted(pmd_t pmd, bool write)
1085{
1086 return pte_access_permitted(pmd_pte(pmd), write);
1087}
1088
1089#ifdef CONFIG_TRANSPARENT_HUGEPAGE
1090extern pmd_t pfn_pmd(unsigned long pfn, pgprot_t pgprot);
1091extern pmd_t mk_pmd(struct page *page, pgprot_t pgprot);
1092extern pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot);
1093extern void set_pmd_at(struct mm_struct *mm, unsigned long addr,
1094 pmd_t *pmdp, pmd_t pmd);
1095extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
1096 pmd_t *pmd);
1097extern int hash__has_transparent_hugepage(void);
1098static inline int has_transparent_hugepage(void)
1099{
1100 if (radix_enabled())
1101 return radix__has_transparent_hugepage();
1102 return hash__has_transparent_hugepage();
1103}
1104#define has_transparent_hugepage has_transparent_hugepage
1105
1106static inline unsigned long
1107pmd_hugepage_update(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp,
1108 unsigned long clr, unsigned long set)
1109{
1110 if (radix_enabled())
1111 return radix__pmd_hugepage_update(mm, addr, pmdp, clr, set);
1112 return hash__pmd_hugepage_update(mm, addr, pmdp, clr, set);
1113}
1114
1115static inline int pmd_large(pmd_t pmd)
1116{
1117 return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
1118}
1119
1120static inline pmd_t pmd_mknotpresent(pmd_t pmd)
1121{
1122 return __pmd(pmd_val(pmd) & ~_PAGE_PRESENT);
1123}
1124
1125
1126
1127
1128static inline int __pmdp_test_and_clear_young(struct mm_struct *mm,
1129 unsigned long addr, pmd_t *pmdp)
1130{
1131 unsigned long old;
1132
1133 if ((pmd_raw(*pmdp) & cpu_to_be64(_PAGE_ACCESSED | H_PAGE_HASHPTE)) == 0)
1134 return 0;
1135 old = pmd_hugepage_update(mm, addr, pmdp, _PAGE_ACCESSED, 0);
1136 return ((old & _PAGE_ACCESSED) != 0);
1137}
1138
1139#define __HAVE_ARCH_PMDP_SET_WRPROTECT
1140static inline void pmdp_set_wrprotect(struct mm_struct *mm, unsigned long addr,
1141 pmd_t *pmdp)
1142{
1143 if (__pmd_write((*pmdp)))
1144 pmd_hugepage_update(mm, addr, pmdp, _PAGE_WRITE, 0);
1145 else if (unlikely(pmd_savedwrite(*pmdp)))
1146 pmd_hugepage_update(mm, addr, pmdp, 0, _PAGE_PRIVILEGED);
1147}
1148
1149static inline int pmd_trans_huge(pmd_t pmd)
1150{
1151 if (radix_enabled())
1152 return radix__pmd_trans_huge(pmd);
1153 return hash__pmd_trans_huge(pmd);
1154}
1155
1156#define __HAVE_ARCH_PMD_SAME
1157static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b)
1158{
1159 if (radix_enabled())
1160 return radix__pmd_same(pmd_a, pmd_b);
1161 return hash__pmd_same(pmd_a, pmd_b);
1162}
1163
1164static inline pmd_t pmd_mkhuge(pmd_t pmd)
1165{
1166 if (radix_enabled())
1167 return radix__pmd_mkhuge(pmd);
1168 return hash__pmd_mkhuge(pmd);
1169}
1170
1171#define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
1172extern int pmdp_set_access_flags(struct vm_area_struct *vma,
1173 unsigned long address, pmd_t *pmdp,
1174 pmd_t entry, int dirty);
1175
1176#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
1177extern int pmdp_test_and_clear_young(struct vm_area_struct *vma,
1178 unsigned long address, pmd_t *pmdp);
1179
1180#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
1181static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
1182 unsigned long addr, pmd_t *pmdp)
1183{
1184 if (radix_enabled())
1185 return radix__pmdp_huge_get_and_clear(mm, addr, pmdp);
1186 return hash__pmdp_huge_get_and_clear(mm, addr, pmdp);
1187}
1188
1189static inline pmd_t pmdp_collapse_flush(struct vm_area_struct *vma,
1190 unsigned long address, pmd_t *pmdp)
1191{
1192 if (radix_enabled())
1193 return radix__pmdp_collapse_flush(vma, address, pmdp);
1194 return hash__pmdp_collapse_flush(vma, address, pmdp);
1195}
1196#define pmdp_collapse_flush pmdp_collapse_flush
1197
1198#define __HAVE_ARCH_PGTABLE_DEPOSIT
1199static inline void pgtable_trans_huge_deposit(struct mm_struct *mm,
1200 pmd_t *pmdp, pgtable_t pgtable)
1201{
1202 if (radix_enabled())
1203 return radix__pgtable_trans_huge_deposit(mm, pmdp, pgtable);
1204 return hash__pgtable_trans_huge_deposit(mm, pmdp, pgtable);
1205}
1206
1207#define __HAVE_ARCH_PGTABLE_WITHDRAW
1208static inline pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm,
1209 pmd_t *pmdp)
1210{
1211 if (radix_enabled())
1212 return radix__pgtable_trans_huge_withdraw(mm, pmdp);
1213 return hash__pgtable_trans_huge_withdraw(mm, pmdp);
1214}
1215
1216#define __HAVE_ARCH_PMDP_INVALIDATE
1217extern pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
1218 pmd_t *pmdp);
1219
1220#define pmd_move_must_withdraw pmd_move_must_withdraw
1221struct spinlock;
1222static inline int pmd_move_must_withdraw(struct spinlock *new_pmd_ptl,
1223 struct spinlock *old_pmd_ptl,
1224 struct vm_area_struct *vma)
1225{
1226 if (radix_enabled())
1227 return false;
1228
1229
1230
1231
1232
1233 return true;
1234}
1235
1236
1237#define arch_needs_pgtable_deposit arch_needs_pgtable_deposit
1238static inline bool arch_needs_pgtable_deposit(void)
1239{
1240 if (radix_enabled())
1241 return false;
1242 return true;
1243}
1244extern void serialize_against_pte_lookup(struct mm_struct *mm);
1245
1246
1247static inline pmd_t pmd_mkdevmap(pmd_t pmd)
1248{
1249 return __pmd(pmd_val(pmd) | (_PAGE_PTE | _PAGE_DEVMAP));
1250}
1251
1252static inline int pmd_devmap(pmd_t pmd)
1253{
1254 return pte_devmap(pmd_pte(pmd));
1255}
1256
1257static inline int pud_devmap(pud_t pud)
1258{
1259 return 0;
1260}
1261
1262static inline int pgd_devmap(pgd_t pgd)
1263{
1264 return 0;
1265}
1266#endif
1267
1268static inline const int pud_pfn(pud_t pud)
1269{
1270
1271
1272
1273
1274
1275 BUILD_BUG();
1276 return 0;
1277}
1278
1279#endif
1280#endif
1281