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1da177e4 LT |
1 | /* pgalloc.h: Page allocation routines for FRV |
2 | * | |
3 | * Copyright (C) 2004 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 License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * Derived from: | |
12 | * include/asm-m68knommu/pgalloc.h | |
13 | * include/asm-i386/pgalloc.h | |
14 | */ | |
15 | #ifndef _ASM_PGALLOC_H | |
16 | #define _ASM_PGALLOC_H | |
17 | ||
18 | #include <linux/config.h> | |
19 | #include <asm/setup.h> | |
20 | #include <asm/virtconvert.h> | |
21 | ||
22 | #ifdef CONFIG_MMU | |
23 | ||
24 | #define pmd_populate_kernel(mm, pmd, pte) __set_pmd(pmd, __pa(pte) | _PAGE_TABLE) | |
25 | #define pmd_populate(MM, PMD, PAGE) \ | |
26 | do { \ | |
27 | __set_pmd((PMD), page_to_pfn(PAGE) << PAGE_SHIFT | _PAGE_TABLE); \ | |
28 | } while(0) | |
29 | ||
30 | /* | |
31 | * Allocate and free page tables. | |
32 | */ | |
33 | ||
34 | extern pgd_t *pgd_alloc(struct mm_struct *); | |
35 | extern void pgd_free(pgd_t *); | |
36 | ||
37 | extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long); | |
38 | ||
39 | extern struct page *pte_alloc_one(struct mm_struct *, unsigned long); | |
40 | ||
41 | static inline void pte_free_kernel(pte_t *pte) | |
42 | { | |
43 | free_page((unsigned long)pte); | |
44 | } | |
45 | ||
46 | static inline void pte_free(struct page *pte) | |
47 | { | |
48 | __free_page(pte); | |
49 | } | |
50 | ||
51 | #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) | |
52 | ||
53 | /* | |
54 | * allocating and freeing a pmd is trivial: the 1-entry pmd is | |
55 | * inside the pgd, so has no extra memory associated with it. | |
56 | * (In the PAE case we free the pmds as part of the pgd.) | |
57 | */ | |
58 | #define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *) 2); }) | |
59 | #define pmd_free(x) do { } while (0) | |
60 | #define __pmd_free_tlb(tlb,x) do { } while (0) | |
61 | ||
62 | #endif /* CONFIG_MMU */ | |
63 | ||
64 | #endif /* _ASM_PGALLOC_H */ |