| 1 |
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| 2 | |
| 3 | * Copyright 2003 PathScale Inc
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| 4 | * Derived from include/asm-i386/pgtable.h
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| 5 |
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| 6 |
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| 7 | #ifndef __UM_PGTABLE_4LEVEL_H
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| 8 | #define __UM_PGTABLE_4LEVEL_H
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| 9 |
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| 10 | #include <asm-generic/pgtable-nop4d.h>
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| 11 |
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| 12 |
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| 13 |
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| 14 | #define PGDIR_SHIFT 39
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| 15 | #define PGDIR_SIZE (1UL << PGDIR_SHIFT)
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| 16 | #define PGDIR_MASK (~(PGDIR_SIZE-1))
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| 17 |
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| 18 | |
| 19 | * map
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| 20 |
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| 21 |
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| 22 | #define PUD_SHIFT 30
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| 23 | #define PUD_SIZE (1UL << PUD_SHIFT)
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| 24 | #define PUD_MASK (~(PUD_SIZE-1))
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| 25 |
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| 26 | |
| 27 | * map
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| 28 |
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| 29 |
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| 30 | #define PMD_SHIFT 21
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| 31 | #define PMD_SIZE (1UL << PMD_SHIFT)
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| 32 | #define PMD_MASK (~(PMD_SIZE-1))
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| 33 |
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| 34 | |
| 35 | * entries per page directory level
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| 36 |
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| 37 |
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| 38 | #define PTRS_PER_PTE 512
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| 39 | #define PTRS_PER_PMD 512
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| 40 | #define PTRS_PER_PUD 512
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| 41 | #define PTRS_PER_PGD 512
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| 42 |
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| 43 | #define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE)
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| 44 |
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| 45 | #define pte_ERROR(e) \
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| 46 | printk("%s:%d: bad pte %p(%016lx).\n", __FILE__, __LINE__, &(e), \
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| 47 | pte_val(e))
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| 48 | #define pmd_ERROR(e) \
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| 49 | printk("%s:%d: bad pmd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
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| 50 | pmd_val(e))
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| 51 | #define pud_ERROR(e) \
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| 52 | printk("%s:%d: bad pud %p(%016lx).\n", __FILE__, __LINE__, &(e), \
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| 53 | pud_val(e))
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| 54 | #define pgd_ERROR(e) \
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| 55 | printk("%s:%d: bad pgd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
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| 56 | pgd_val(e))
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| 57 |
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| 58 | #define pud_none(x) (!(pud_val(x) & ~_PAGE_NEEDSYNC))
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| 59 | #define pud_bad(x) ((pud_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
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| 60 | #define pud_present(x) (pud_val(x) & _PAGE_PRESENT)
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| 61 | #define pud_populate(mm, pud, pmd) \
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| 62 | set_pud(pud, __pud(_PAGE_TABLE + __pa(pmd)))
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| 63 |
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| 64 | #define set_pud(pudptr, pudval) (*(pudptr) = (pudval))
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| 65 |
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| 66 | #define p4d_none(x) (!(p4d_val(x) & ~_PAGE_NEEDSYNC))
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| 67 | #define p4d_bad(x) ((p4d_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
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| 68 | #define p4d_present(x) (p4d_val(x) & _PAGE_PRESENT)
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| 69 | #define p4d_populate(mm, p4d, pud) \
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| 70 | set_p4d(p4d, __p4d(_PAGE_TABLE + __pa(pud)))
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| 71 |
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| 72 | #define set_p4d(p4dptr, p4dval) (*(p4dptr) = (p4dval))
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| 73 |
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| 74 |
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| 75 | static inline int pgd_needsync(pgd_t pgd)
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| 76 | {
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| 77 | return pgd_val(pgd) & _PAGE_NEEDSYNC;
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| 78 | }
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| 79 |
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| 80 | static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEEDSYNC; }
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| 81 |
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| 82 | #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
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| 83 |
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| 84 | static inline void pud_clear (pud_t *pud)
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| 85 | {
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| 86 | set_pud(pud, __pud(_PAGE_NEEDSYNC));
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| 87 | }
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| 88 |
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| 89 | static inline void p4d_clear (p4d_t *p4d)
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| 90 | {
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| 91 | set_p4d(p4d, __p4d(_PAGE_NEEDSYNC));
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| 92 | }
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| 93 |
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| 94 | #define pud_page(pud) phys_to_page(pud_val(pud) & PAGE_MASK)
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| 95 | #define pud_pgtable(pud) ((pmd_t *) __va(pud_val(pud) & PAGE_MASK))
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| 96 |
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| 97 | #define p4d_page(p4d) phys_to_page(p4d_val(p4d) & PAGE_MASK)
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| 98 | #define p4d_pgtable(p4d) ((pud_t *) __va(p4d_val(p4d) & PAGE_MASK))
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| 99 |
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| 100 | static inline unsigned long pte_pfn(pte_t pte)
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| 101 | {
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| 102 | return phys_to_pfn(pte_val(pte));
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| 103 | }
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| 104 |
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| 105 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
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| 106 | {
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| 107 | return __pmd((page_nr << PAGE_SHIFT) | pgprot_val(pgprot));
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| 108 | }
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| 109 |
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| 110 | #endif
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