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
10#ifndef _ASM_NIOS2_PGALLOC_H
11#define _ASM_NIOS2_PGALLOC_H
12
13#include <linux/mm.h>
14
15static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
16 pte_t *pte)
17{
18 set_pmd(pmd, __pmd((unsigned long)pte));
19}
20
21static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
22 pgtable_t pte)
23{
24 set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
25}
26#define pmd_pgtable(pmd) pmd_page(pmd)
27
28/*
29 * Initialize a new pmd table with invalid pointers.
30 */
31extern void pmd_init(unsigned long page, unsigned long pagetable);
32
33extern pgd_t *pgd_alloc(struct mm_struct *mm);
34
35static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
36{
37 free_pages((unsigned long)pgd, PGD_ORDER);
38}
39
40static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
41{
42 pte_t *pte;
43
44 pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_ZERO, PTE_ORDER);
45
46 return pte;
47}
48
49static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
50{
51 struct page *pte;
52
53 pte = alloc_pages(GFP_KERNEL, PTE_ORDER);
54 if (pte) {
55 if (!pgtable_page_ctor(pte)) {
56 __free_page(pte);
57 return NULL;
58 }
59 clear_highpage(pte);
60 }
61 return pte;
62}
63
64static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
65{
66 free_pages((unsigned long)pte, PTE_ORDER);
67}
68
69static inline void pte_free(struct mm_struct *mm, struct page *pte)
70{
71 pgtable_page_dtor(pte);
72 __free_pages(pte, PTE_ORDER);
73}
74
75#define __pte_free_tlb(tlb, pte, addr) \
76 do { \
77 pgtable_page_dtor(pte); \
78 tlb_remove_page((tlb), (pte)); \
79 } while (0)
80
81#define check_pgt_cache() do { } while (0)
82
83#endif /* _ASM_NIOS2_PGALLOC_H */