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	unsigned long address)
42{
43	pte_t *pte;
44
45	pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO,
46					PTE_ORDER);
47
48	return pte;
49}
50
51static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
52	unsigned long address)
53{
54	struct page *pte;
55
56	pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT, PTE_ORDER);
57	if (pte) {
58		if (!pgtable_page_ctor(pte)) {
59			__free_page(pte);
60			return NULL;
61		}
62		clear_highpage(pte);
63	}
64	return pte;
65}
66
67static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
68{
69	free_pages((unsigned long)pte, PTE_ORDER);
70}
71
72static inline void pte_free(struct mm_struct *mm, struct page *pte)
73{
74	pgtable_page_dtor(pte);
75	__free_pages(pte, PTE_ORDER);
76}
77
78#define __pte_free_tlb(tlb, pte, addr)				\
79	do {							\
80		pgtable_page_dtor(pte);				\
81		tlb_remove_page((tlb), (pte));			\
82	} while (0)
83
84#define check_pgt_cache()	do { } while (0)
85
86#endif /* _ASM_NIOS2_PGALLOC_H */
87