Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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
16#define __HAVE_ARCH_PMD_ALLOC_ONE
17#define __HAVE_ARCH_PUD_ALLOC_ONE
18#include <asm-generic/pgalloc.h>
19
20static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
21 pte_t *pte)
22{
23 set_pmd(pmd, __pmd((unsigned long)pte));
24}
25
26static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
27 pgtable_t pte)
28{
29 set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
30}
31
32/*
33 * Initialize a new pmd table with invalid pointers.
34 */
35extern void pmd_init(void *addr);
36
37#ifndef __PAGETABLE_PMD_FOLDED
38
39static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
40{
41 set_pud(pud, __pud((unsigned long)pmd));
42}
43#endif
44
45/*
46 * Initialize a new pgd table with invalid pointers.
47 */
48extern void pgd_init(void *addr);
49extern pgd_t *pgd_alloc(struct mm_struct *mm);
50
51#define __pte_free_tlb(tlb, pte, address) \
52 tlb_remove_ptdesc((tlb), page_ptdesc(pte))
53
54#ifndef __PAGETABLE_PMD_FOLDED
55
56static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
57{
58 pmd_t *pmd;
59 struct ptdesc *ptdesc;
60
61 ptdesc = pagetable_alloc(GFP_KERNEL_ACCOUNT, PMD_TABLE_ORDER);
62 if (!ptdesc)
63 return NULL;
64
65 if (!pagetable_pmd_ctor(mm, ptdesc)) {
66 pagetable_free(ptdesc);
67 return NULL;
68 }
69
70 pmd = ptdesc_address(ptdesc);
71 pmd_init(pmd);
72 return pmd;
73}
74
75#define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
76
77#endif
78
79#ifndef __PAGETABLE_PUD_FOLDED
80
81static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
82{
83 pud_t *pud;
84 struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL, PUD_TABLE_ORDER);
85
86 if (!ptdesc)
87 return NULL;
88 pagetable_pud_ctor(ptdesc);
89 pud = ptdesc_address(ptdesc);
90
91 pud_init(pud);
92 return pud;
93}
94
95static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
96{
97 set_p4d(p4d, __p4d((unsigned long)pud));
98}
99
100#define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x)
101
102#endif /* __PAGETABLE_PUD_FOLDED */
103
104extern void pagetable_init(void);
105
106#endif /* _ASM_PGALLOC_H */