LXR linux/arch/nios2/include/asm/pgalloc.h

   1/*
   2 * This file is subject to the terms and conditions of the GNU General Public
   3 * License.  See the file "COPYING" in the main directory of this archive
   4 * for more details.
   5 *
   6 * Copyright (C) 1994 - 2001, 2003 by Ralf Baechle
   7 * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
   8 */
   9
  10#ifndef _ASM_NIOS2_PGALLOC_H
  11#define _ASM_NIOS2_PGALLOC_H
  12
  13#include <linux/mm.h>
  14
  15static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
  16        pte_t *pte)
  17{
  18        set_pmd(pmd, __pmd((unsigned long)pte));
  19}
  20
  21static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
  22        pgtable_t pte)
  23{
  24        set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
  25}
  26#define pmd_pgtable(pmd) pmd_page(pmd)
  27
  28/*
  29 * Initialize a new pmd table with invalid pointers.
  30 */
  31extern void pmd_init(unsigned long page, unsigned long pagetable);
  32
  33extern pgd_t *pgd_alloc(struct mm_struct *mm);
  34
  35static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
  36{
  37        free_pages((unsigned long)pgd, PGD_ORDER);
  38}
  39
  40static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
  41        unsigned long address)
  42{
  43        pte_t *pte;
  44
  45        pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO,
  46                                        PTE_ORDER);
  47
  48        return pte;
  49}
  50
  51static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
  52        unsigned long address)
  53{
  54        struct page *pte;
  55
  56        pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT, PTE_ORDER);
  57        if (pte) {
  58                if (!pgtable_page_ctor(pte)) {
  59                        __free_page(pte);
  60                        return NULL;
  61                }
  62                clear_highpage(pte);
  63        }
  64        return pte;
  65}
  66
  67static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  68{
  69        free_pages((unsigned long)pte, PTE_ORDER);
  70}
  71
  72static inline void pte_free(struct mm_struct *mm, struct page *pte)
  73{
  74        pgtable_page_dtor(pte);
  75        __free_pages(pte, PTE_ORDER);
  76}
  77
  78#define __pte_free_tlb(tlb, pte, addr)                          \
  79        do {                                                    \
  80                pgtable_page_dtor(pte);                         \
  81                tlb_remove_page((tlb), (pte));                  \
  82        } while (0)
  83
  84#define check_pgt_cache()       do { } while (0)
  85
  86#endif /* _ASM_NIOS2_PGALLOC_H */
  87