1 #ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_H_
2 #define _ASM_POWERPC_BOOK3S_64_PGTABLE_H_
5 * Common bits between hash and Radix page table
7 #define _PAGE_BIT_SWAP_TYPE 0
9 #define _PAGE_EXEC 0x00001 /* execute permission */
10 #define _PAGE_WRITE 0x00002 /* write access allowed */
11 #define _PAGE_READ 0x00004 /* read access allowed */
12 #define _PAGE_RW (_PAGE_READ | _PAGE_WRITE)
13 #define _PAGE_RWX (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)
14 #define _PAGE_PRIVILEGED 0x00008 /* kernel access only */
15 #define _PAGE_SAO 0x00010 /* Strong access order */
16 #define _PAGE_NON_IDEMPOTENT 0x00020 /* non idempotent memory */
17 #define _PAGE_TOLERANT 0x00030 /* tolerant memory, cache inhibited */
18 #define _PAGE_DIRTY 0x00080 /* C: page changed */
19 #define _PAGE_ACCESSED 0x00100 /* R: page referenced */
23 #define _RPAGE_SW0 0x2000000000000000UL
24 #define _RPAGE_SW1 0x00800
25 #define _RPAGE_SW2 0x00400
26 #define _RPAGE_SW3 0x00200
27 #ifdef CONFIG_MEM_SOFT_DIRTY
28 #define _PAGE_SOFT_DIRTY _RPAGE_SW3 /* software: software dirty tracking */
30 #define _PAGE_SOFT_DIRTY 0x00000
32 #define _PAGE_SPECIAL _RPAGE_SW2 /* software: special page */
35 #define _PAGE_PTE (1ul << 62) /* distinguishes PTEs from pointers */
36 #define _PAGE_PRESENT (1ul << 63) /* pte contains a translation */
38 * Drivers request for cache inhibited pte mapping using _PAGE_NO_CACHE
39 * Instead of fixing all of them, add an alternate define which
40 * maps CI pte mapping.
42 #define _PAGE_NO_CACHE _PAGE_TOLERANT
44 * We support 57 bit real address in pte. Clear everything above 57, and
45 * every thing below PAGE_SHIFT;
47 #define PTE_RPN_MASK (((1UL << 57) - 1) & (PAGE_MASK))
49 * set of bits not changed in pmd_modify. Even though we have hash specific bits
50 * in here, on radix we expect them to be zero.
52 #define _HPAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_HPTEFLAGS | _PAGE_DIRTY | \
53 _PAGE_ACCESSED | H_PAGE_THP_HUGE | _PAGE_PTE | \
56 * user access blocked by key
58 #define _PAGE_KERNEL_RW (_PAGE_PRIVILEGED | _PAGE_RW | _PAGE_DIRTY)
59 #define _PAGE_KERNEL_RO (_PAGE_PRIVILEGED | _PAGE_READ)
60 #define _PAGE_KERNEL_RWX (_PAGE_PRIVILEGED | _PAGE_DIRTY | \
61 _PAGE_RW | _PAGE_EXEC)
63 * No page size encoding in the linux PTE
67 * _PAGE_CHG_MASK masks of bits that are to be preserved across
70 #define _PAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_HPTEFLAGS | _PAGE_DIRTY | \
71 _PAGE_ACCESSED | _PAGE_SPECIAL | _PAGE_PTE | \
74 * Mask of bits returned by pte_pgprot()
76 #define PAGE_PROT_BITS (_PAGE_SAO | _PAGE_NON_IDEMPOTENT | _PAGE_TOLERANT | \
77 H_PAGE_4K_PFN | _PAGE_PRIVILEGED | _PAGE_ACCESSED | \
78 _PAGE_READ | _PAGE_WRITE | _PAGE_DIRTY | _PAGE_EXEC | \
81 * We define 2 sets of base prot bits, one for basic pages (ie,
82 * cacheable kernel and user pages) and one for non cacheable
83 * pages. We always set _PAGE_COHERENT when SMP is enabled or
84 * the processor might need it for DMA coherency.
86 #define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_PSIZE)
87 #define _PAGE_BASE (_PAGE_BASE_NC)
89 /* Permission masks used to generate the __P and __S table,
91 * Note:__pgprot is defined in arch/powerpc/include/asm/page.h
93 * Write permissions imply read permissions for now (we could make write-only
94 * pages on BookE but we don't bother for now). Execute permission control is
95 * possible on platforms that define _PAGE_EXEC
97 * Note due to the way vm flags are laid out, the bits are XWR
99 #define PAGE_NONE __pgprot(_PAGE_BASE | _PAGE_PRIVILEGED)
100 #define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_RW)
101 #define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_RW | _PAGE_EXEC)
102 #define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_READ)
103 #define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_EXEC)
104 #define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_READ)
105 #define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_EXEC)
107 #define __P000 PAGE_NONE
108 #define __P001 PAGE_READONLY
109 #define __P010 PAGE_COPY
110 #define __P011 PAGE_COPY
111 #define __P100 PAGE_READONLY_X
112 #define __P101 PAGE_READONLY_X
113 #define __P110 PAGE_COPY_X
114 #define __P111 PAGE_COPY_X
116 #define __S000 PAGE_NONE
117 #define __S001 PAGE_READONLY
118 #define __S010 PAGE_SHARED
119 #define __S011 PAGE_SHARED
120 #define __S100 PAGE_READONLY_X
121 #define __S101 PAGE_READONLY_X
122 #define __S110 PAGE_SHARED_X
123 #define __S111 PAGE_SHARED_X
125 /* Permission masks used for kernel mappings */
126 #define PAGE_KERNEL __pgprot(_PAGE_BASE | _PAGE_KERNEL_RW)
127 #define PAGE_KERNEL_NC __pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \
129 #define PAGE_KERNEL_NCG __pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \
130 _PAGE_NON_IDEMPOTENT)
131 #define PAGE_KERNEL_X __pgprot(_PAGE_BASE | _PAGE_KERNEL_RWX)
132 #define PAGE_KERNEL_RO __pgprot(_PAGE_BASE | _PAGE_KERNEL_RO)
133 #define PAGE_KERNEL_ROX __pgprot(_PAGE_BASE | _PAGE_KERNEL_ROX)
136 * Protection used for kernel text. We want the debuggers to be able to
137 * set breakpoints anywhere, so don't write protect the kernel text
138 * on platforms where such control is possible.
140 #if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH) || \
141 defined(CONFIG_KPROBES) || defined(CONFIG_DYNAMIC_FTRACE)
142 #define PAGE_KERNEL_TEXT PAGE_KERNEL_X
144 #define PAGE_KERNEL_TEXT PAGE_KERNEL_ROX
147 /* Make modules code happy. We don't set RO yet */
148 #define PAGE_KERNEL_EXEC PAGE_KERNEL_X
149 #define PAGE_AGP (PAGE_KERNEL_NC)
155 extern unsigned long __pte_index_size;
156 extern unsigned long __pmd_index_size;
157 extern unsigned long __pud_index_size;
158 extern unsigned long __pgd_index_size;
159 extern unsigned long __pmd_cache_index;
160 #define PTE_INDEX_SIZE __pte_index_size
161 #define PMD_INDEX_SIZE __pmd_index_size
162 #define PUD_INDEX_SIZE __pud_index_size
163 #define PGD_INDEX_SIZE __pgd_index_size
164 #define PMD_CACHE_INDEX __pmd_cache_index
166 * Because of use of pte fragments and THP, size of page table
167 * are not always derived out of index size above.
169 extern unsigned long __pte_table_size;
170 extern unsigned long __pmd_table_size;
171 extern unsigned long __pud_table_size;
172 extern unsigned long __pgd_table_size;
173 #define PTE_TABLE_SIZE __pte_table_size
174 #define PMD_TABLE_SIZE __pmd_table_size
175 #define PUD_TABLE_SIZE __pud_table_size
176 #define PGD_TABLE_SIZE __pgd_table_size
178 extern unsigned long __pmd_val_bits;
179 extern unsigned long __pud_val_bits;
180 extern unsigned long __pgd_val_bits;
181 #define PMD_VAL_BITS __pmd_val_bits
182 #define PUD_VAL_BITS __pud_val_bits
183 #define PGD_VAL_BITS __pgd_val_bits
185 extern unsigned long __pte_frag_nr;
186 #define PTE_FRAG_NR __pte_frag_nr
187 extern unsigned long __pte_frag_size_shift;
188 #define PTE_FRAG_SIZE_SHIFT __pte_frag_size_shift
189 #define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT)
191 * Pgtable size used by swapper, init in asm code
193 #define MAX_PGD_TABLE_SIZE (sizeof(pgd_t) << RADIX_PGD_INDEX_SIZE)
195 #define PTRS_PER_PTE (1 << PTE_INDEX_SIZE)
196 #define PTRS_PER_PMD (1 << PMD_INDEX_SIZE)
197 #define PTRS_PER_PUD (1 << PUD_INDEX_SIZE)
198 #define PTRS_PER_PGD (1 << PGD_INDEX_SIZE)
200 /* PMD_SHIFT determines what a second-level page table entry can map */
201 #define PMD_SHIFT (PAGE_SHIFT + PTE_INDEX_SIZE)
202 #define PMD_SIZE (1UL << PMD_SHIFT)
203 #define PMD_MASK (~(PMD_SIZE-1))
205 /* PUD_SHIFT determines what a third-level page table entry can map */
206 #define PUD_SHIFT (PMD_SHIFT + PMD_INDEX_SIZE)
207 #define PUD_SIZE (1UL << PUD_SHIFT)
208 #define PUD_MASK (~(PUD_SIZE-1))
210 /* PGDIR_SHIFT determines what a fourth-level page table entry can map */
211 #define PGDIR_SHIFT (PUD_SHIFT + PUD_INDEX_SIZE)
212 #define PGDIR_SIZE (1UL << PGDIR_SHIFT)
213 #define PGDIR_MASK (~(PGDIR_SIZE-1))
215 /* Bits to mask out from a PMD to get to the PTE page */
216 #define PMD_MASKED_BITS 0xc0000000000000ffUL
217 /* Bits to mask out from a PUD to get to the PMD page */
218 #define PUD_MASKED_BITS 0xc0000000000000ffUL
219 /* Bits to mask out from a PGD to get to the PUD page */
220 #define PGD_MASKED_BITS 0xc0000000000000ffUL
222 extern unsigned long __vmalloc_start;
223 extern unsigned long __vmalloc_end;
224 #define VMALLOC_START __vmalloc_start
225 #define VMALLOC_END __vmalloc_end
227 extern unsigned long __kernel_virt_start;
228 extern unsigned long __kernel_virt_size;
229 #define KERN_VIRT_START __kernel_virt_start
230 #define KERN_VIRT_SIZE __kernel_virt_size
231 extern struct page *vmemmap;
232 extern unsigned long ioremap_bot;
233 extern unsigned long pci_io_base;
234 #endif /* __ASSEMBLY__ */
236 #include <asm/book3s/64/hash.h>
237 #include <asm/book3s/64/radix.h>
239 #ifdef CONFIG_PPC_64K_PAGES
240 #include <asm/book3s/64/pgtable-64k.h>
242 #include <asm/book3s/64/pgtable-4k.h>
245 #include <asm/barrier.h>
247 * The second half of the kernel virtual space is used for IO mappings,
248 * it's itself carved into the PIO region (ISA and PHB IO space) and
251 * ISA_IO_BASE = KERN_IO_START, 64K reserved area
252 * PHB_IO_BASE = ISA_IO_BASE + 64K to ISA_IO_BASE + 2G, PHB IO spaces
253 * IOREMAP_BASE = ISA_IO_BASE + 2G to VMALLOC_START + PGTABLE_RANGE
255 #define KERN_IO_START (KERN_VIRT_START + (KERN_VIRT_SIZE >> 1))
256 #define FULL_IO_SIZE 0x80000000ul
257 #define ISA_IO_BASE (KERN_IO_START)
258 #define ISA_IO_END (KERN_IO_START + 0x10000ul)
259 #define PHB_IO_BASE (ISA_IO_END)
260 #define PHB_IO_END (KERN_IO_START + FULL_IO_SIZE)
261 #define IOREMAP_BASE (PHB_IO_END)
262 #define IOREMAP_END (KERN_VIRT_START + KERN_VIRT_SIZE)
264 /* Advertise special mapping type for AGP */
265 #define HAVE_PAGE_AGP
267 /* Advertise support for _PAGE_SPECIAL */
268 #define __HAVE_ARCH_PTE_SPECIAL
273 * This is the default implementation of various PTE accessors, it's
274 * used in all cases except Book3S with 64K pages where we have a
275 * concept of sub-pages
279 #define __real_pte(e,p) ((real_pte_t){(e)})
280 #define __rpte_to_pte(r) ((r).pte)
281 #define __rpte_to_hidx(r,index) (pte_val(__rpte_to_pte(r)) >> H_PAGE_F_GIX_SHIFT)
283 #define pte_iterate_hashed_subpages(rpte, psize, va, index, shift) \
286 shift = mmu_psize_defs[psize].shift; \
288 #define pte_iterate_hashed_end() } while(0)
291 * We expect this to be called only for user addresses or kernel virtual
292 * addresses other than the linear mapping.
294 #define pte_pagesize_index(mm, addr, pte) MMU_PAGE_4K
296 #endif /* __real_pte */
298 static inline unsigned long pte_update(struct mm_struct *mm, unsigned long addr,
299 pte_t *ptep, unsigned long clr,
300 unsigned long set, int huge)
303 return radix__pte_update(mm, addr, ptep, clr, set, huge);
304 return hash__pte_update(mm, addr, ptep, clr, set, huge);
307 * For hash even if we have _PAGE_ACCESSED = 0, we do a pte_update.
308 * We currently remove entries from the hashtable regardless of whether
309 * the entry was young or dirty.
311 * We should be more intelligent about this but for the moment we override
312 * these functions and force a tlb flush unconditionally
313 * For radix: H_PAGE_HASHPTE should be zero. Hence we can use the same
314 * function for both hash and radix.
316 static inline int __ptep_test_and_clear_young(struct mm_struct *mm,
317 unsigned long addr, pte_t *ptep)
321 if ((pte_val(*ptep) & (_PAGE_ACCESSED | H_PAGE_HASHPTE)) == 0)
323 old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0, 0);
324 return (old & _PAGE_ACCESSED) != 0;
327 #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
328 #define ptep_test_and_clear_young(__vma, __addr, __ptep) \
331 __r = __ptep_test_and_clear_young((__vma)->vm_mm, __addr, __ptep); \
335 #define __HAVE_ARCH_PTEP_SET_WRPROTECT
336 static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
340 if ((pte_val(*ptep) & _PAGE_WRITE) == 0)
343 pte_update(mm, addr, ptep, _PAGE_WRITE, 0, 0);
346 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
347 unsigned long addr, pte_t *ptep)
349 if ((pte_val(*ptep) & _PAGE_WRITE) == 0)
352 pte_update(mm, addr, ptep, _PAGE_WRITE, 0, 1);
355 #define __HAVE_ARCH_PTEP_GET_AND_CLEAR
356 static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
357 unsigned long addr, pte_t *ptep)
359 unsigned long old = pte_update(mm, addr, ptep, ~0UL, 0, 0);
363 static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
366 pte_update(mm, addr, ptep, ~0UL, 0, 0);
368 static inline int pte_write(pte_t pte) { return !!(pte_val(pte) & _PAGE_WRITE);}
369 static inline int pte_dirty(pte_t pte) { return !!(pte_val(pte) & _PAGE_DIRTY); }
370 static inline int pte_young(pte_t pte) { return !!(pte_val(pte) & _PAGE_ACCESSED); }
371 static inline int pte_special(pte_t pte) { return !!(pte_val(pte) & _PAGE_SPECIAL); }
372 static inline pgprot_t pte_pgprot(pte_t pte) { return __pgprot(pte_val(pte) & PAGE_PROT_BITS); }
374 #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY
375 static inline bool pte_soft_dirty(pte_t pte)
377 return !!(pte_val(pte) & _PAGE_SOFT_DIRTY);
379 static inline pte_t pte_mksoft_dirty(pte_t pte)
381 return __pte(pte_val(pte) | _PAGE_SOFT_DIRTY);
384 static inline pte_t pte_clear_soft_dirty(pte_t pte)
386 return __pte(pte_val(pte) & ~_PAGE_SOFT_DIRTY);
388 #endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */
390 #ifdef CONFIG_NUMA_BALANCING
392 * These work without NUMA balancing but the kernel does not care. See the
393 * comment in include/asm-generic/pgtable.h . On powerpc, this will only
394 * work for user pages and always return true for kernel pages.
396 static inline int pte_protnone(pte_t pte)
398 return (pte_val(pte) & (_PAGE_PRESENT | _PAGE_PRIVILEGED)) ==
399 (_PAGE_PRESENT | _PAGE_PRIVILEGED);
401 #endif /* CONFIG_NUMA_BALANCING */
403 static inline int pte_present(pte_t pte)
405 return !!(pte_val(pte) & _PAGE_PRESENT);
408 * Conversion functions: convert a page and protection to a page entry,
409 * and a page entry and page directory to the page they refer to.
411 * Even if PTEs can be unsigned long long, a PFN is always an unsigned
414 static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot)
416 return __pte((((pte_basic_t)(pfn) << PAGE_SHIFT) & PTE_RPN_MASK) |
420 static inline unsigned long pte_pfn(pte_t pte)
422 return (pte_val(pte) & PTE_RPN_MASK) >> PAGE_SHIFT;
425 /* Generic modifiers for PTE bits */
426 static inline pte_t pte_wrprotect(pte_t pte)
428 return __pte(pte_val(pte) & ~_PAGE_WRITE);
431 static inline pte_t pte_mkclean(pte_t pte)
433 return __pte(pte_val(pte) & ~_PAGE_DIRTY);
436 static inline pte_t pte_mkold(pte_t pte)
438 return __pte(pte_val(pte) & ~_PAGE_ACCESSED);
441 static inline pte_t pte_mkwrite(pte_t pte)
444 * write implies read, hence set both
446 return __pte(pte_val(pte) | _PAGE_RW);
449 static inline pte_t pte_mkdirty(pte_t pte)
451 return __pte(pte_val(pte) | _PAGE_DIRTY | _PAGE_SOFT_DIRTY);
454 static inline pte_t pte_mkyoung(pte_t pte)
456 return __pte(pte_val(pte) | _PAGE_ACCESSED);
459 static inline pte_t pte_mkspecial(pte_t pte)
461 return __pte(pte_val(pte) | _PAGE_SPECIAL);
464 static inline pte_t pte_mkhuge(pte_t pte)
469 static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
471 /* FIXME!! check whether this need to be a conditional */
472 return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
475 static inline bool pte_user(pte_t pte)
477 return !(pte_val(pte) & _PAGE_PRIVILEGED);
480 /* Encode and de-code a swap entry */
481 #define MAX_SWAPFILES_CHECK() do { \
482 BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS); \
484 * Don't have overlapping bits with _PAGE_HPTEFLAGS \
485 * We filter HPTEFLAGS on set_pte. \
487 BUILD_BUG_ON(_PAGE_HPTEFLAGS & (0x1f << _PAGE_BIT_SWAP_TYPE)); \
488 BUILD_BUG_ON(_PAGE_HPTEFLAGS & _PAGE_SWP_SOFT_DIRTY); \
491 * on pte we don't need handle RADIX_TREE_EXCEPTIONAL_SHIFT;
493 #define SWP_TYPE_BITS 5
494 #define __swp_type(x) (((x).val >> _PAGE_BIT_SWAP_TYPE) \
495 & ((1UL << SWP_TYPE_BITS) - 1))
496 #define __swp_offset(x) (((x).val & PTE_RPN_MASK) >> PAGE_SHIFT)
497 #define __swp_entry(type, offset) ((swp_entry_t) { \
498 ((type) << _PAGE_BIT_SWAP_TYPE) \
499 | (((offset) << PAGE_SHIFT) & PTE_RPN_MASK)})
501 * swp_entry_t must be independent of pte bits. We build a swp_entry_t from
502 * swap type and offset we get from swap and convert that to pte to find a
503 * matching pte in linux page table.
504 * Clear bits not found in swap entries here.
506 #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) & ~_PAGE_PTE })
507 #define __swp_entry_to_pte(x) __pte((x).val | _PAGE_PTE)
509 #ifdef CONFIG_MEM_SOFT_DIRTY
510 #define _PAGE_SWP_SOFT_DIRTY (1UL << (SWP_TYPE_BITS + _PAGE_BIT_SWAP_TYPE))
512 #define _PAGE_SWP_SOFT_DIRTY 0UL
513 #endif /* CONFIG_MEM_SOFT_DIRTY */
515 #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY
516 static inline pte_t pte_swp_mksoft_dirty(pte_t pte)
518 return __pte(pte_val(pte) | _PAGE_SWP_SOFT_DIRTY);
520 static inline bool pte_swp_soft_dirty(pte_t pte)
522 return !!(pte_val(pte) & _PAGE_SWP_SOFT_DIRTY);
524 static inline pte_t pte_swp_clear_soft_dirty(pte_t pte)
526 return __pte(pte_val(pte) & ~_PAGE_SWP_SOFT_DIRTY);
528 #endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */
530 static inline bool check_pte_access(unsigned long access, unsigned long ptev)
533 * This check for _PAGE_RWX and _PAGE_PRESENT bits
538 * This check for access to privilege space
540 if ((access & _PAGE_PRIVILEGED) != (ptev & _PAGE_PRIVILEGED))
546 * Generic functions with hash/radix callbacks
549 static inline void __ptep_set_access_flags(pte_t *ptep, pte_t entry)
552 return radix__ptep_set_access_flags(ptep, entry);
553 return hash__ptep_set_access_flags(ptep, entry);
556 #define __HAVE_ARCH_PTE_SAME
557 static inline int pte_same(pte_t pte_a, pte_t pte_b)
560 return radix__pte_same(pte_a, pte_b);
561 return hash__pte_same(pte_a, pte_b);
564 static inline int pte_none(pte_t pte)
567 return radix__pte_none(pte);
568 return hash__pte_none(pte);
571 static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
572 pte_t *ptep, pte_t pte, int percpu)
575 return radix__set_pte_at(mm, addr, ptep, pte, percpu);
576 return hash__set_pte_at(mm, addr, ptep, pte, percpu);
579 #define _PAGE_CACHE_CTL (_PAGE_NON_IDEMPOTENT | _PAGE_TOLERANT)
581 #define pgprot_noncached pgprot_noncached
582 static inline pgprot_t pgprot_noncached(pgprot_t prot)
584 return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
585 _PAGE_NON_IDEMPOTENT);
588 #define pgprot_noncached_wc pgprot_noncached_wc
589 static inline pgprot_t pgprot_noncached_wc(pgprot_t prot)
591 return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
595 #define pgprot_cached pgprot_cached
596 static inline pgprot_t pgprot_cached(pgprot_t prot)
598 return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL));
601 #define pgprot_writecombine pgprot_writecombine
602 static inline pgprot_t pgprot_writecombine(pgprot_t prot)
604 return pgprot_noncached_wc(prot);
607 * check a pte mapping have cache inhibited property
609 static inline bool pte_ci(pte_t pte)
611 unsigned long pte_v = pte_val(pte);
613 if (((pte_v & _PAGE_CACHE_CTL) == _PAGE_TOLERANT) ||
614 ((pte_v & _PAGE_CACHE_CTL) == _PAGE_NON_IDEMPOTENT))
619 static inline void pmd_set(pmd_t *pmdp, unsigned long val)
624 static inline void pmd_clear(pmd_t *pmdp)
629 #define pmd_none(pmd) (!pmd_val(pmd))
630 #define pmd_present(pmd) (!pmd_none(pmd))
632 static inline int pmd_bad(pmd_t pmd)
635 return radix__pmd_bad(pmd);
636 return hash__pmd_bad(pmd);
639 static inline void pud_set(pud_t *pudp, unsigned long val)
644 static inline void pud_clear(pud_t *pudp)
649 #define pud_none(pud) (!pud_val(pud))
650 #define pud_present(pud) (pud_val(pud) != 0)
652 extern struct page *pud_page(pud_t pud);
653 extern struct page *pmd_page(pmd_t pmd);
654 static inline pte_t pud_pte(pud_t pud)
656 return __pte(pud_val(pud));
659 static inline pud_t pte_pud(pte_t pte)
661 return __pud(pte_val(pte));
663 #define pud_write(pud) pte_write(pud_pte(pud))
665 static inline int pud_bad(pud_t pud)
668 return radix__pud_bad(pud);
669 return hash__pud_bad(pud);
673 #define pgd_write(pgd) pte_write(pgd_pte(pgd))
674 static inline void pgd_set(pgd_t *pgdp, unsigned long val)
679 static inline void pgd_clear(pgd_t *pgdp)
684 #define pgd_none(pgd) (!pgd_val(pgd))
685 #define pgd_present(pgd) (!pgd_none(pgd))
687 static inline pte_t pgd_pte(pgd_t pgd)
689 return __pte(pgd_val(pgd));
692 static inline pgd_t pte_pgd(pte_t pte)
694 return __pgd(pte_val(pte));
697 static inline int pgd_bad(pgd_t pgd)
700 return radix__pgd_bad(pgd);
701 return hash__pgd_bad(pgd);
704 extern struct page *pgd_page(pgd_t pgd);
706 /* Pointers in the page table tree are physical addresses */
707 #define __pgtable_ptr_val(ptr) __pa(ptr)
709 #define pmd_page_vaddr(pmd) __va(pmd_val(pmd) & ~PMD_MASKED_BITS)
710 #define pud_page_vaddr(pud) __va(pud_val(pud) & ~PUD_MASKED_BITS)
711 #define pgd_page_vaddr(pgd) __va(pgd_val(pgd) & ~PGD_MASKED_BITS)
713 #define pgd_index(address) (((address) >> (PGDIR_SHIFT)) & (PTRS_PER_PGD - 1))
714 #define pud_index(address) (((address) >> (PUD_SHIFT)) & (PTRS_PER_PUD - 1))
715 #define pmd_index(address) (((address) >> (PMD_SHIFT)) & (PTRS_PER_PMD - 1))
716 #define pte_index(address) (((address) >> (PAGE_SHIFT)) & (PTRS_PER_PTE - 1))
719 * Find an entry in a page-table-directory. We combine the address region
720 * (the high order N bits) and the pgd portion of the address.
723 #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
725 #define pud_offset(pgdp, addr) \
726 (((pud_t *) pgd_page_vaddr(*(pgdp))) + pud_index(addr))
727 #define pmd_offset(pudp,addr) \
728 (((pmd_t *) pud_page_vaddr(*(pudp))) + pmd_index(addr))
729 #define pte_offset_kernel(dir,addr) \
730 (((pte_t *) pmd_page_vaddr(*(dir))) + pte_index(addr))
732 #define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr))
733 #define pte_unmap(pte) do { } while(0)
735 /* to find an entry in a kernel page-table-directory */
736 /* This now only contains the vmalloc pages */
737 #define pgd_offset_k(address) pgd_offset(&init_mm, address)
739 #define pte_ERROR(e) \
740 pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
741 #define pmd_ERROR(e) \
742 pr_err("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
743 #define pud_ERROR(e) \
744 pr_err("%s:%d: bad pud %08lx.\n", __FILE__, __LINE__, pud_val(e))
745 #define pgd_ERROR(e) \
746 pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
748 void pgtable_cache_add(unsigned shift, void (*ctor)(void *));
749 void pgtable_cache_init(void);
751 static inline int map_kernel_page(unsigned long ea, unsigned long pa,
754 if (radix_enabled()) {
755 #if defined(CONFIG_PPC_RADIX_MMU) && defined(DEBUG_VM)
756 unsigned long page_size = 1 << mmu_psize_defs[mmu_io_psize].shift;
757 WARN((page_size != PAGE_SIZE), "I/O page size != PAGE_SIZE");
759 return radix__map_kernel_page(ea, pa, __pgprot(flags), PAGE_SIZE);
761 return hash__map_kernel_page(ea, pa, flags);
764 static inline int __meminit vmemmap_create_mapping(unsigned long start,
765 unsigned long page_size,
769 return radix__vmemmap_create_mapping(start, page_size, phys);
770 return hash__vmemmap_create_mapping(start, page_size, phys);
773 #ifdef CONFIG_MEMORY_HOTPLUG
774 static inline void vmemmap_remove_mapping(unsigned long start,
775 unsigned long page_size)
778 return radix__vmemmap_remove_mapping(start, page_size);
779 return hash__vmemmap_remove_mapping(start, page_size);
782 struct page *realmode_pfn_to_page(unsigned long pfn);
784 static inline pte_t pmd_pte(pmd_t pmd)
786 return __pte(pmd_val(pmd));
789 static inline pmd_t pte_pmd(pte_t pte)
791 return __pmd(pte_val(pte));
794 static inline pte_t *pmdp_ptep(pmd_t *pmd)
798 #define pmd_pfn(pmd) pte_pfn(pmd_pte(pmd))
799 #define pmd_dirty(pmd) pte_dirty(pmd_pte(pmd))
800 #define pmd_young(pmd) pte_young(pmd_pte(pmd))
801 #define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd)))
802 #define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd)))
803 #define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
804 #define pmd_mkclean(pmd) pte_pmd(pte_mkclean(pmd_pte(pmd)))
805 #define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
806 #define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd)))
808 #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY
809 #define pmd_soft_dirty(pmd) pte_soft_dirty(pmd_pte(pmd))
810 #define pmd_mksoft_dirty(pmd) pte_pmd(pte_mksoft_dirty(pmd_pte(pmd)))
811 #define pmd_clear_soft_dirty(pmd) pte_pmd(pte_clear_soft_dirty(pmd_pte(pmd)))
812 #endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */
814 #ifdef CONFIG_NUMA_BALANCING
815 static inline int pmd_protnone(pmd_t pmd)
817 return pte_protnone(pmd_pte(pmd));
819 #endif /* CONFIG_NUMA_BALANCING */
821 #define __HAVE_ARCH_PMD_WRITE
822 #define pmd_write(pmd) pte_write(pmd_pte(pmd))
824 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
825 extern pmd_t pfn_pmd(unsigned long pfn, pgprot_t pgprot);
826 extern pmd_t mk_pmd(struct page *page, pgprot_t pgprot);
827 extern pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot);
828 extern void set_pmd_at(struct mm_struct *mm, unsigned long addr,
829 pmd_t *pmdp, pmd_t pmd);
830 extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
832 extern int hash__has_transparent_hugepage(void);
833 static inline int has_transparent_hugepage(void)
836 return radix__has_transparent_hugepage();
837 return hash__has_transparent_hugepage();
839 #define has_transparent_hugepage has_transparent_hugepage
841 static inline unsigned long
842 pmd_hugepage_update(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp,
843 unsigned long clr, unsigned long set)
846 return radix__pmd_hugepage_update(mm, addr, pmdp, clr, set);
847 return hash__pmd_hugepage_update(mm, addr, pmdp, clr, set);
850 static inline int pmd_large(pmd_t pmd)
852 return !!(pmd_val(pmd) & _PAGE_PTE);
855 static inline pmd_t pmd_mknotpresent(pmd_t pmd)
857 return __pmd(pmd_val(pmd) & ~_PAGE_PRESENT);
860 * For radix we should always find H_PAGE_HASHPTE zero. Hence
861 * the below will work for radix too
863 static inline int __pmdp_test_and_clear_young(struct mm_struct *mm,
864 unsigned long addr, pmd_t *pmdp)
868 if ((pmd_val(*pmdp) & (_PAGE_ACCESSED | H_PAGE_HASHPTE)) == 0)
870 old = pmd_hugepage_update(mm, addr, pmdp, _PAGE_ACCESSED, 0);
871 return ((old & _PAGE_ACCESSED) != 0);
874 #define __HAVE_ARCH_PMDP_SET_WRPROTECT
875 static inline void pmdp_set_wrprotect(struct mm_struct *mm, unsigned long addr,
879 if ((pmd_val(*pmdp) & _PAGE_WRITE) == 0)
882 pmd_hugepage_update(mm, addr, pmdp, _PAGE_WRITE, 0);
885 static inline int pmd_trans_huge(pmd_t pmd)
888 return radix__pmd_trans_huge(pmd);
889 return hash__pmd_trans_huge(pmd);
892 #define __HAVE_ARCH_PMD_SAME
893 static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b)
896 return radix__pmd_same(pmd_a, pmd_b);
897 return hash__pmd_same(pmd_a, pmd_b);
900 static inline pmd_t pmd_mkhuge(pmd_t pmd)
903 return radix__pmd_mkhuge(pmd);
904 return hash__pmd_mkhuge(pmd);
907 #define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
908 extern int pmdp_set_access_flags(struct vm_area_struct *vma,
909 unsigned long address, pmd_t *pmdp,
910 pmd_t entry, int dirty);
912 #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
913 extern int pmdp_test_and_clear_young(struct vm_area_struct *vma,
914 unsigned long address, pmd_t *pmdp);
916 #define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
917 static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
918 unsigned long addr, pmd_t *pmdp)
921 return radix__pmdp_huge_get_and_clear(mm, addr, pmdp);
922 return hash__pmdp_huge_get_and_clear(mm, addr, pmdp);
925 static inline pmd_t pmdp_collapse_flush(struct vm_area_struct *vma,
926 unsigned long address, pmd_t *pmdp)
929 return radix__pmdp_collapse_flush(vma, address, pmdp);
930 return hash__pmdp_collapse_flush(vma, address, pmdp);
932 #define pmdp_collapse_flush pmdp_collapse_flush
934 #define __HAVE_ARCH_PGTABLE_DEPOSIT
935 static inline void pgtable_trans_huge_deposit(struct mm_struct *mm,
936 pmd_t *pmdp, pgtable_t pgtable)
939 return radix__pgtable_trans_huge_deposit(mm, pmdp, pgtable);
940 return hash__pgtable_trans_huge_deposit(mm, pmdp, pgtable);
943 #define __HAVE_ARCH_PGTABLE_WITHDRAW
944 static inline pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm,
948 return radix__pgtable_trans_huge_withdraw(mm, pmdp);
949 return hash__pgtable_trans_huge_withdraw(mm, pmdp);
952 #define __HAVE_ARCH_PMDP_INVALIDATE
953 extern void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
956 #define __HAVE_ARCH_PMDP_HUGE_SPLIT_PREPARE
957 static inline void pmdp_huge_split_prepare(struct vm_area_struct *vma,
958 unsigned long address, pmd_t *pmdp)
961 return radix__pmdp_huge_split_prepare(vma, address, pmdp);
962 return hash__pmdp_huge_split_prepare(vma, address, pmdp);
965 #define pmd_move_must_withdraw pmd_move_must_withdraw
967 static inline int pmd_move_must_withdraw(struct spinlock *new_pmd_ptl,
968 struct spinlock *old_pmd_ptl)
973 * Archs like ppc64 use pgtable to store per pmd
974 * specific information. So when we switch the pmd,
975 * we should also withdraw and deposit the pgtable
979 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
980 #endif /* __ASSEMBLY__ */
981 #endif /* _ASM_POWERPC_BOOK3S_64_PGTABLE_H_ */