| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 */ |