Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1994 - 2001, 2003 by Ralf Baechle
7 * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
8 */
9#ifndef _ASM_PGALLOC_H
10#define _ASM_PGALLOC_H
11
12#include <linux/highmem.h>
13#include <linux/mm.h>
14#include <linux/sched.h>
15
16static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
17 pte_t *pte)
18{
19 set_pmd(pmd, __pmd((unsigned long)pte));
20}
21
22static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
23 pgtable_t pte)
24{
25 set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
26}
27#define pmd_pgtable(pmd) pmd_page(pmd)
28
29/*
30 * Initialize a new pmd table with invalid pointers.
31 */
32extern void pmd_init(unsigned long page, unsigned long pagetable);
33
34#ifndef __PAGETABLE_PMD_FOLDED
35
36static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
37{
38 set_pud(pud, __pud((unsigned long)pmd));
39}
40#endif
41
42/*
43 * Initialize a new pgd / pmd table with invalid pointers.
44 */
45extern void pgd_init(unsigned long page);
46extern pgd_t *pgd_alloc(struct mm_struct *mm);
47
48static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
49{
50 free_pages((unsigned long)pgd, PGD_ORDER);
51}
52
53static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
54{
55 return (pte_t *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, PTE_ORDER);
56}
57
58static inline struct page *pte_alloc_one(struct mm_struct *mm)
59{
60 struct page *pte;
61
62 pte = alloc_pages(GFP_KERNEL, PTE_ORDER);
63 if (!pte)
64 return NULL;
65 clear_highpage(pte);
66 if (!pgtable_page_ctor(pte)) {
67 __free_page(pte);
68 return NULL;
69 }
70 return pte;
71}
72
73static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
74{
75 free_pages((unsigned long)pte, PTE_ORDER);
76}
77
78static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
79{
80 pgtable_page_dtor(pte);
81 __free_pages(pte, PTE_ORDER);
82}
83
84#define __pte_free_tlb(tlb,pte,address) \
85do { \
86 pgtable_page_dtor(pte); \
87 tlb_remove_page((tlb), pte); \
88} while (0)
89
90#ifndef __PAGETABLE_PMD_FOLDED
91
92static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
93{
94 pmd_t *pmd;
95
96 pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER);
97 if (pmd)
98 pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
99 return pmd;
100}
101
102static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
103{
104 free_pages((unsigned long)pmd, PMD_ORDER);
105}
106
107#define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
108
109#endif
110
111#ifndef __PAGETABLE_PUD_FOLDED
112
113static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
114{
115 pud_t *pud;
116
117 pud = (pud_t *) __get_free_pages(GFP_KERNEL, PUD_ORDER);
118 if (pud)
119 pud_init((unsigned long)pud, (unsigned long)invalid_pmd_table);
120 return pud;
121}
122
123static inline void pud_free(struct mm_struct *mm, pud_t *pud)
124{
125 free_pages((unsigned long)pud, PUD_ORDER);
126}
127
128static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
129{
130 set_pgd(pgd, __pgd((unsigned long)pud));
131}
132
133#define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x)
134
135#endif /* __PAGETABLE_PUD_FOLDED */
136
137#define check_pgt_cache() do { } while (0)
138
139extern void pagetable_init(void);
140
141#endif /* _ASM_PGALLOC_H */