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Linux/arch/mn10300/include/asm/pgalloc.h

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  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/page.h>
 15 #include <linux/threads.h>
 16 #include <linux/mm.h>           /* for struct page */
 17 
 18 struct mm_struct;
 19 struct page;
 20 
 21 /* attach a page table to a PMD entry */
 22 #define pmd_populate_kernel(mm, pmd, pte) \
 23         set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE))
 24 
 25 static inline
 26 void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
 27 {
 28         set_pmd(pmd, __pmd((page_to_pfn(pte) << PAGE_SHIFT) | _PAGE_TABLE));
 29 }
 30 #define pmd_pgtable(pmd) pmd_page(pmd)
 31 
 32 /*
 33  * Allocate and free page tables.
 34  */
 35 
 36 extern pgd_t *pgd_alloc(struct mm_struct *);
 37 extern void pgd_free(struct mm_struct *, pgd_t *);
 38 
 39 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
 40 extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
 41 
 42 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
 43 {
 44         free_page((unsigned long) pte);
 45 }
 46 
 47 static inline void pte_free(struct mm_struct *mm, struct page *pte)
 48 {
 49         pgtable_page_dtor(pte);
 50         __free_page(pte);
 51 }
 52 
 53 
 54 #define __pte_free_tlb(tlb, pte, addr) tlb_remove_page((tlb), (pte))
 55 
 56 #endif /* _ASM_PGALLOC_H */
 57 

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