include/asm-avr32/pgalloc.h

   1 /*
   2  * Copyright (C) 2004-2006 Atmel Corporation
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8 #ifndef __ASM_AVR32_PGALLOC_H
   9 #define __ASM_AVR32_PGALLOC_H
  10
  11 #include <linux/mm.h>
  12
  13 static inline void pmd_populate_kernel(struct mm_struct *mm,
  14                                        pmd_t *pmd, pte_t *pte)
  15 {
  16         set_pmd(pmd, __pmd((unsigned long)pte));
  17 }
  18
  19 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
  20                                     pgtable_t pte)
  21 {
  22         set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
  23 }
  24 #define pmd_pgtable(pmd) pmd_page(pmd)
  25
  26 /*
  27  * Allocate and free page tables
  28  */
  29 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
  30 {
  31         pgd_t *pgd;
  32
  33         pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL | __GFP_REPEAT);
  34         if (likely(pgd))
  35                 memcpy(pgd + USER_PTRS_PER_PGD,
  36                         swapper_pg_dir + USER_PTRS_PER_PGD,
  37                         (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
  38
  39         return pgd;
  40 }
  41
  42 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
  43 {
  44         free_page((unsigned long)pgd);
  45 }
  46
  47 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
  48                                           unsigned long address)
  49 {
  50         pte_t *pte;
  51
  52         pte = (pte_t *)get_zeroed_page(GFP_KERNEL | __GFP_REPEAT);
  53
  54         return pte;
  55 }
  56
  57 static inline struct page *pte_alloc_one(struct mm_struct *mm,
  58                                          unsigned long address)
  59 {
  60         struct page *pte;
  61
  62         pte = alloc_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
  63         if (!pte)
  64                 return NULL;
  65         pgtable_page_ctor(pte);
  66         return pte;
  67 }
  68
  69 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  70 {
  71         free_page((unsigned long)pte);
  72 }
  73
  74 static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
  75 {
  76         pgtable_page_dtor(pte);
  77         __free_page(pte);
  78 }
  79
  80 #define __pte_free_tlb(tlb,pte)                         \
  81 do {                                                    \
  82         pgtable_page_dtor(pte);                         \
  83         tlb_remove_page((tlb), pte);                    \
  84 } while (0)
  85
  86 #define check_pgt_cache() do { } while(0)
  87
  88 #endif /* __ASM_AVR32_PGALLOC_H */