include/asm-frv/pgalloc.h

   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 <asm/setup.h>
  19 #include <asm/virtconvert.h>
  20
  21 #ifdef CONFIG_MMU
  22
  23 #define pmd_populate_kernel(mm, pmd, pte) __set_pmd(pmd, __pa(pte) | _PAGE_TABLE)
  24 #define pmd_populate(MM, PMD, PAGE)                                             \
  25 do {                                                                            \
  26         __set_pmd((PMD), page_to_pfn(PAGE) << PAGE_SHIFT | _PAGE_TABLE);        \
  27 } while(0)
  28
  29 /*
  30  * Allocate and free page tables.
  31  */
  32
  33 extern pgd_t *pgd_alloc(struct mm_struct *);
  34 extern void pgd_free(pgd_t *);
  35
  36 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
  37
  38 extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
  39
  40 static inline void pte_free_kernel(pte_t *pte)
  41 {
  42         free_page((unsigned long)pte);
  43 }
  44
  45 static inline void pte_free(struct page *pte)
  46 {
  47         __free_page(pte);
  48 }
  49
  50 #define __pte_free_tlb(tlb,pte)         tlb_remove_page((tlb),(pte))
  51
  52 /*
  53  * allocating and freeing a pmd is trivial: the 1-entry pmd is
  54  * inside the pgd, so has no extra memory associated with it.
  55  * (In the PAE case we free the pmds as part of the pgd.)
  56  */
  57 #define pmd_alloc_one(mm, addr)         ({ BUG(); ((pmd_t *) 2); })
  58 #define pmd_free(x)                     do { } while (0)
  59 #define __pmd_free_tlb(tlb,x)           do { } while (0)
  60
  61 #endif /* CONFIG_MMU */
  62
  63 #endif /* _ASM_PGALLOC_H */