blob: ec057e1bd4cf3e72538d4b8c5ae3a83b4c887694 [file] [log] [blame]
David Howellsb920de12008-02-08 04:19:31 -08001/* MN10300 Page and page table/directory allocation
2 *
3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public Licence
8 * as published by the Free Software Foundation; either version
9 * 2 of the Licence, or (at your option) any later version.
10 */
11#ifndef _ASM_PGALLOC_H
12#define _ASM_PGALLOC_H
13
14#include <asm/processor.h>
15#include <asm/page.h>
16#include <linux/threads.h>
17#include <linux/mm.h> /* for struct page */
18
19struct mm_struct;
20struct page;
21
22/* attach a page table to a PMD entry */
23#define pmd_populate_kernel(mm, pmd, pte) \
24 set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE))
25
26static inline
27void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
28{
29 set_pmd(pmd, __pmd((page_to_pfn(pte) << PAGE_SHIFT) | _PAGE_TABLE));
30}
31#define pmd_pgtable(pmd) pmd_page(pmd)
32
33/*
34 * Allocate and free page tables.
35 */
36
37extern pgd_t *pgd_alloc(struct mm_struct *);
38extern void pgd_free(struct mm_struct *, pgd_t *);
39
40extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
41extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
42
43static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
44{
45 free_page((unsigned long) pte);
46}
47
48static inline void pte_free(struct mm_struct *mm, struct page *pte)
49{
50 __free_page(pte);
51}
52
53
54#define __pte_free_tlb(tlb, pte) tlb_remove_page((tlb), (pte))
55
56#endif /* _ASM_PGALLOC_H */