projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 1da177e4 LT |
18 | #include <asm/setup.h> |
| 19 | #include <asm/virtconvert.h> | |
| 20 | ||
| 21 | #ifdef CONFIG_MMU | |
| 22 | ||
| 23 | #define pmd_populate_kernel(mm, pmd, pte) __set_pmd(pmd, __pa(pte) | _PAGE_TABLE) | |
| 24 | #define pmd_populate(MM, PMD, PAGE) \ | |
| 25 | do { \ | |
| 26 | __set_pmd((PMD), page_to_pfn(PAGE) << PAGE_SHIFT | _PAGE_TABLE); \ | |
| 27 | } while(0) | |
| 2f569afd | 28 | #define pmd_pgtable(pmd) pmd_page(pmd) |
| 1da177e4 LT |
29 | |
| 30 | /* | |
| 31 | * Allocate and free page tables. | |
| 32 | */ | |
| 33 | ||
| 34 | extern pgd_t *pgd_alloc(struct mm_struct *); | |
| 5e541973 | 35 | extern void pgd_free(struct mm_struct *mm, pgd_t *); |
| 1da177e4 LT |
36 | |
| 37 | extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long); | |
| 38 | ||
| 2f569afd | 39 | extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long); |
| 1da177e4 | 40 | |
| 5e541973 | 41 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) |
| 1da177e4 LT |
42 | { |
| 43 | free_page((unsigned long)pte); | |
| 44 | } | |
| 45 | ||
| 2f569afd | 46 | static inline void pte_free(struct mm_struct *mm, pgtable_t pte) |
| 1da177e4 | 47 | { |
| 2f569afd | 48 | pgtable_page_dtor(pte); |
| 1da177e4 LT |
49 | __free_page(pte); |
| 50 | } | |
| 51 | ||
| 2f569afd MS |
52 | #define __pte_free_tlb(tlb,pte) \ |
| 53 | do { \ | |
| 54 | pgtable_page_dtor(pte); \ | |
| 55 | tlb_remove_page((tlb),(pte)); \ | |
| 56 | } while (0) | |
| 1da177e4 LT |
57 | |
| 58 | /* | |
| 59 | * allocating and freeing a pmd is trivial: the 1-entry pmd is | |
| 60 | * inside the pgd, so has no extra memory associated with it. | |
| 61 | * (In the PAE case we free the pmds as part of the pgd.) | |
| 62 | */ | |
| 63 | #define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *) 2); }) | |
| 5e541973 | 64 | #define pmd_free(mm, x) do { } while (0) |
| 1da177e4 LT |
65 | #define __pmd_free_tlb(tlb,x) do { } while (0) |
| 66 | ||
| 67 | #endif /* CONFIG_MMU */ | |
| 68 | ||
| 69 | #endif /* _ASM_PGALLOC_H */ |