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1da177e4 LT |
1 | /* |
2 | * Copyright 2003 PathScale Inc | |
3 | * Derived from include/asm-i386/pgtable.h | |
4 | * Licensed under the GPL | |
5 | */ | |
6 | ||
7 | #ifndef __UM_PGTABLE_3LEVEL_H | |
8 | #define __UM_PGTABLE_3LEVEL_H | |
9 | ||
9849a569 | 10 | #define __ARCH_USE_5LEVEL_HACK |
1da177e4 LT |
11 | #include <asm-generic/pgtable-nopud.h> |
12 | ||
13 | /* PGDIR_SHIFT determines what a third-level page table entry can map */ | |
14 | ||
655e4ed0 | 15 | #ifdef CONFIG_64BIT |
1da177e4 | 16 | #define PGDIR_SHIFT 30 |
655e4ed0 JD |
17 | #else |
18 | #define PGDIR_SHIFT 31 | |
19 | #endif | |
1da177e4 LT |
20 | #define PGDIR_SIZE (1UL << PGDIR_SHIFT) |
21 | #define PGDIR_MASK (~(PGDIR_SIZE-1)) | |
22 | ||
23 | /* PMD_SHIFT determines the size of the area a second-level page table can | |
24 | * map | |
25 | */ | |
26 | ||
27 | #define PMD_SHIFT 21 | |
28 | #define PMD_SIZE (1UL << PMD_SHIFT) | |
29 | #define PMD_MASK (~(PMD_SIZE-1)) | |
30 | ||
31 | /* | |
32 | * entries per page directory level | |
33 | */ | |
34 | ||
35 | #define PTRS_PER_PTE 512 | |
655e4ed0 | 36 | #ifdef CONFIG_64BIT |
1da177e4 | 37 | #define PTRS_PER_PMD 512 |
1da177e4 | 38 | #define PTRS_PER_PGD 512 |
655e4ed0 JD |
39 | #else |
40 | #define PTRS_PER_PMD 1024 | |
41 | #define PTRS_PER_PGD 1024 | |
42 | #endif | |
43 | ||
44 | #define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE) | |
d016bf7e | 45 | #define FIRST_USER_ADDRESS 0UL |
1da177e4 LT |
46 | |
47 | #define pte_ERROR(e) \ | |
48 | printk("%s:%d: bad pte %p(%016lx).\n", __FILE__, __LINE__, &(e), \ | |
49 | pte_val(e)) | |
50 | #define pmd_ERROR(e) \ | |
51 | printk("%s:%d: bad pmd %p(%016lx).\n", __FILE__, __LINE__, &(e), \ | |
52 | pmd_val(e)) | |
53 | #define pgd_ERROR(e) \ | |
54 | printk("%s:%d: bad pgd %p(%016lx).\n", __FILE__, __LINE__, &(e), \ | |
55 | pgd_val(e)) | |
56 | ||
57 | #define pud_none(x) (!(pud_val(x) & ~_PAGE_NEWPAGE)) | |
58 | #define pud_bad(x) ((pud_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE) | |
59 | #define pud_present(x) (pud_val(x) & _PAGE_PRESENT) | |
60 | #define pud_populate(mm, pud, pmd) \ | |
61 | set_pud(pud, __pud(_PAGE_TABLE + __pa(pmd))) | |
62 | ||
655e4ed0 | 63 | #ifdef CONFIG_64BIT |
bf676945 | 64 | #define set_pud(pudptr, pudval) set_64bit((u64 *) (pudptr), pud_val(pudval)) |
655e4ed0 JD |
65 | #else |
66 | #define set_pud(pudptr, pudval) (*(pudptr) = (pudval)) | |
67 | #endif | |
68 | ||
1da177e4 LT |
69 | static inline int pgd_newpage(pgd_t pgd) |
70 | { | |
71 | return(pgd_val(pgd) & _PAGE_NEWPAGE); | |
72 | } | |
73 | ||
74 | static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEWPAGE; } | |
75 | ||
655e4ed0 | 76 | #ifdef CONFIG_64BIT |
bf676945 | 77 | #define set_pmd(pmdptr, pmdval) set_64bit((u64 *) (pmdptr), pmd_val(pmdval)) |
655e4ed0 JD |
78 | #else |
79 | #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval)) | |
80 | #endif | |
1da177e4 | 81 | |
8192ab42 JD |
82 | struct mm_struct; |
83 | extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address); | |
1da177e4 | 84 | |
b21d4b08 | 85 | static inline void pud_clear (pud_t *pud) |
7ef93905 | 86 | { |
8cd8fa55 | 87 | set_pud(pud, __pud(_PAGE_NEWPAGE)); |
1da177e4 LT |
88 | } |
89 | ||
46a82b2d | 90 | #define pud_page(pud) phys_to_page(pud_val(pud) & PAGE_MASK) |
909e90d3 | 91 | #define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & PAGE_MASK)) |
1da177e4 LT |
92 | |
93 | /* Find an entry in the second-level page table.. */ | |
46a82b2d | 94 | #define pmd_offset(pud, address) ((pmd_t *) pud_page_vaddr(*(pud)) + \ |
1da177e4 LT |
95 | pmd_index(address)) |
96 | ||
1da177e4 LT |
97 | static inline unsigned long pte_pfn(pte_t pte) |
98 | { | |
99 | return phys_to_pfn(pte_val(pte)); | |
100 | } | |
101 | ||
16da3068 | 102 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
1da177e4 LT |
103 | { |
104 | pte_t pte; | |
105 | phys_t phys = pfn_to_phys(page_nr); | |
106 | ||
107 | pte_set_val(pte, phys, pgprot); | |
108 | return pte; | |
109 | } | |
110 | ||
16da3068 | 111 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) |
1da177e4 LT |
112 | { |
113 | return __pmd((page_nr << PAGE_SHIFT) | pgprot_val(pgprot)); | |
114 | } | |
115 | ||
1da177e4 LT |
116 | #endif |
117 |