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
18 struct mm_struct;
19 struct 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
25 static inline
26 void 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
36 extern pgd_t *pgd_alloc(struct mm_struct *);
37 extern void pgd_free(struct mm_struct *, pgd_t *);
38
39 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
40 extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
41
42 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
43 {
44 free_page((unsigned long) pte);
45 }
46
47 static 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
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