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