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b920de1b DH |
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/processor.h> | |
15 | #include <asm/page.h> | |
16 | #include <linux/threads.h> | |
17 | #include <linux/mm.h> /* for struct page */ | |
18 | ||
19 | struct mm_struct; | |
20 | struct 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 | ||
26 | static inline | |
27 | void 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 | ||
37 | extern pgd_t *pgd_alloc(struct mm_struct *); | |
38 | extern void pgd_free(struct mm_struct *, pgd_t *); | |
39 | ||
40 | extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long); | |
41 | extern struct page *pte_alloc_one(struct mm_struct *, unsigned long); | |
42 | ||
43 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) | |
44 | { | |
45 | free_page((unsigned long) pte); | |
46 | } | |
47 | ||
48 | static 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 */ |