projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 */ |