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56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/* MN10300 Page and page table/directory allocation
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#ifndef _ASM_PGALLOC_H
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#define _ASM_PGALLOC_H
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#include <asm/processor.h>
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#include <asm/page.h>
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#include <linux/threads.h>
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#include <linux/mm.h> /* for struct page */
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struct mm_struct;
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struct page;
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/* attach a page table to a PMD entry */
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#define pmd_populate_kernel(mm, pmd, pte) \
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set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE))
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static inline
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void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
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{
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set_pmd(pmd, __pmd((page_to_pfn(pte) << PAGE_SHIFT) | _PAGE_TABLE));
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}
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#define pmd_pgtable(pmd) pmd_page(pmd)
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/*
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* Allocate and free page tables.
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*/
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extern pgd_t *pgd_alloc(struct mm_struct *);
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extern void pgd_free(struct mm_struct *, pgd_t *);
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extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
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extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
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static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
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{
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free_page((unsigned long) pte);
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}
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static inline void pte_free(struct mm_struct *mm, struct page *pte)
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{
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__free_page(pte);
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}
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#define __pte_free_tlb(tlb, pte) tlb_remove_page((tlb), (pte))
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#endif /* _ASM_PGALLOC_H */
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