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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright 2003 PathScale Inc
4 * Derived from include/asm-i386/pgtable.h
5 */
6
7#ifndef __UM_PGTABLE_3LEVEL_H
8#define __UM_PGTABLE_3LEVEL_H
9
10#include <asm-generic/pgtable-nopud.h>
11
12/* PGDIR_SHIFT determines what a third-level page table entry can map */
13
14#ifdef CONFIG_64BIT
15#define PGDIR_SHIFT 30
16#else
17#define PGDIR_SHIFT 31
18#endif
19#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
20#define PGDIR_MASK (~(PGDIR_SIZE-1))
21
22/* PMD_SHIFT determines the size of the area a second-level page table can
23 * map
24 */
25
26#define PMD_SHIFT 21
27#define PMD_SIZE (1UL << PMD_SHIFT)
28#define PMD_MASK (~(PMD_SIZE-1))
29
30/*
31 * entries per page directory level
32 */
33
34#define PTRS_PER_PTE 512
35#ifdef CONFIG_64BIT
36#define PTRS_PER_PMD 512
37#define PTRS_PER_PGD 512
38#else
39#define PTRS_PER_PMD 1024
40#define PTRS_PER_PGD 1024
41#endif
42
43#define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE)
44
45#define pte_ERROR(e) \
46 printk("%s:%d: bad pte %p(%016lx).\n", __FILE__, __LINE__, &(e), \
47 pte_val(e))
48#define pmd_ERROR(e) \
49 printk("%s:%d: bad pmd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
50 pmd_val(e))
51#define pgd_ERROR(e) \
52 printk("%s:%d: bad pgd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
53 pgd_val(e))
54
55#define pud_none(x) (!(pud_val(x) & ~_PAGE_NEWPAGE))
56#define pud_bad(x) ((pud_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
57#define pud_present(x) (pud_val(x) & _PAGE_PRESENT)
58#define pud_populate(mm, pud, pmd) \
59 set_pud(pud, __pud(_PAGE_TABLE + __pa(pmd)))
60
61#define set_pud(pudptr, pudval) (*(pudptr) = (pudval))
62
63static inline int pgd_newpage(pgd_t pgd)
64{
65 return(pgd_val(pgd) & _PAGE_NEWPAGE);
66}
67
68static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEWPAGE; }
69
70#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
71
72static inline void pud_clear (pud_t *pud)
73{
74 set_pud(pud, __pud(_PAGE_NEWPAGE));
75}
76
77#define pud_page(pud) phys_to_page(pud_val(pud) & PAGE_MASK)
78#define pud_pgtable(pud) ((pmd_t *) __va(pud_val(pud) & PAGE_MASK))
79
80static inline unsigned long pte_pfn(pte_t pte)
81{
82 return phys_to_pfn(pte_val(pte));
83}
84
85static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
86{
87 pte_t pte;
88 phys_t phys = pfn_to_phys(page_nr);
89
90 pte_set_val(pte, phys, pgprot);
91 return pte;
92}
93
94static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
95{
96 return __pmd((page_nr << PAGE_SHIFT) | pgprot_val(pgprot));
97}
98
99#endif
100
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
10#include <asm-generic/pgtable-nopud.h>
11
12/* PGDIR_SHIFT determines what a third-level page table entry can map */
13
14#ifdef CONFIG_64BIT
15#define PGDIR_SHIFT 30
16#else
17#define PGDIR_SHIFT 31
18#endif
19#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
20#define PGDIR_MASK (~(PGDIR_SIZE-1))
21
22/* PMD_SHIFT determines the size of the area a second-level page table can
23 * map
24 */
25
26#define PMD_SHIFT 21
27#define PMD_SIZE (1UL << PMD_SHIFT)
28#define PMD_MASK (~(PMD_SIZE-1))
29
30/*
31 * entries per page directory level
32 */
33
34#define PTRS_PER_PTE 512
35#ifdef CONFIG_64BIT
36#define PTRS_PER_PMD 512
37#define PTRS_PER_PGD 512
38#else
39#define PTRS_PER_PMD 1024
40#define PTRS_PER_PGD 1024
41#endif
42
43#define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE)
44#define FIRST_USER_ADDRESS 0
45
46#define pte_ERROR(e) \
47 printk("%s:%d: bad pte %p(%016lx).\n", __FILE__, __LINE__, &(e), \
48 pte_val(e))
49#define pmd_ERROR(e) \
50 printk("%s:%d: bad pmd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
51 pmd_val(e))
52#define pgd_ERROR(e) \
53 printk("%s:%d: bad pgd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
54 pgd_val(e))
55
56#define pud_none(x) (!(pud_val(x) & ~_PAGE_NEWPAGE))
57#define pud_bad(x) ((pud_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
58#define pud_present(x) (pud_val(x) & _PAGE_PRESENT)
59#define pud_populate(mm, pud, pmd) \
60 set_pud(pud, __pud(_PAGE_TABLE + __pa(pmd)))
61
62#ifdef CONFIG_64BIT
63#define set_pud(pudptr, pudval) set_64bit((u64 *) (pudptr), pud_val(pudval))
64#else
65#define set_pud(pudptr, pudval) (*(pudptr) = (pudval))
66#endif
67
68static inline int pgd_newpage(pgd_t pgd)
69{
70 return(pgd_val(pgd) & _PAGE_NEWPAGE);
71}
72
73static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEWPAGE; }
74
75#ifdef CONFIG_64BIT
76#define set_pmd(pmdptr, pmdval) set_64bit((u64 *) (pmdptr), pmd_val(pmdval))
77#else
78#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
79#endif
80
81struct mm_struct;
82extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address);
83
84static inline void pud_clear (pud_t *pud)
85{
86 set_pud(pud, __pud(_PAGE_NEWPAGE));
87}
88
89#define pud_page(pud) phys_to_page(pud_val(pud) & PAGE_MASK)
90#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & PAGE_MASK))
91
92/* Find an entry in the second-level page table.. */
93#define pmd_offset(pud, address) ((pmd_t *) pud_page_vaddr(*(pud)) + \
94 pmd_index(address))
95
96static inline unsigned long pte_pfn(pte_t pte)
97{
98 return phys_to_pfn(pte_val(pte));
99}
100
101static inline pte_t pfn_pte(pfn_t page_nr, pgprot_t pgprot)
102{
103 pte_t pte;
104 phys_t phys = pfn_to_phys(page_nr);
105
106 pte_set_val(pte, phys, pgprot);
107 return pte;
108}
109
110static inline pmd_t pfn_pmd(pfn_t page_nr, pgprot_t pgprot)
111{
112 return __pmd((page_nr << PAGE_SHIFT) | pgprot_val(pgprot));
113}
114
115/*
116 * Bits 0 through 3 are taken in the low part of the pte,
117 * put the 32 bits of offset into the high part.
118 */
119#define PTE_FILE_MAX_BITS 32
120
121#ifdef CONFIG_64BIT
122
123#define pte_to_pgoff(p) ((p).pte >> 32)
124
125#define pgoff_to_pte(off) ((pte_t) { ((off) << 32) | _PAGE_FILE })
126
127#else
128
129#define pte_to_pgoff(pte) ((pte).pte_high)
130
131#define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) })
132
133#endif
134
135#endif
136