1/* 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/page.h>
15#include <linux/threads.h>
16#include <linux/mm.h>		/* for struct page */
17
18struct mm_struct;
19struct page;
20
21/* attach a page table to a PMD entry */
22#define pmd_populate_kernel(mm, pmd, pte) \
23	set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE))
24
25static inline
26void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
27{
28	set_pmd(pmd, __pmd((page_to_pfn(pte) << PAGE_SHIFT) | _PAGE_TABLE));
29}
30#define pmd_pgtable(pmd) pmd_page(pmd)
31
32/*
33 * Allocate and free page tables.
34 */
35
36extern pgd_t *pgd_alloc(struct mm_struct *);
37extern void pgd_free(struct mm_struct *, pgd_t *);
38
39extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
40extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
41
42static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
43{
44	free_page((unsigned long) pte);
45}
46
47static inline void pte_free(struct mm_struct *mm, struct page *pte)
48{
49	pgtable_page_dtor(pte);
50	__free_page(pte);
51}
52
53
54#define __pte_free_tlb(tlb, pte, addr) tlb_remove_page((tlb), (pte))
55
56#endif /* _ASM_PGALLOC_H */
57