| David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 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 */ |