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
  15 static 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
  21 static 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  */
  31 extern void pmd_init(unsigned long page, unsigned long pagetable);
  32
  33 extern pgd_t *pgd_alloc(struct mm_struct *mm);
  34
  35 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
  36 {
  37         free_pages((unsigned long)pgd, PGD_ORDER);
  38 }
  39
  40 static 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_ZERO, PTE_ORDER);
  46
  47         return pte;
  48 }
  49
  50 static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
  51         unsigned long address)
  52 {
  53         struct page *pte;
  54
  55         pte = alloc_pages(GFP_KERNEL, PTE_ORDER);
  56         if (pte) {
  57                 if (!pgtable_page_ctor(pte)) {
  58                         __free_page(pte);
  59                         return NULL;
  60                 }
  61                 clear_highpage(pte);
  62         }
  63         return pte;
  64 }
  65
  66 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  67 {
  68         free_pages((unsigned long)pte, PTE_ORDER);
  69 }
  70
  71 static inline void pte_free(struct mm_struct *mm, struct page *pte)
  72 {
  73         pgtable_page_dtor(pte);
  74         __free_pages(pte, PTE_ORDER);
  75 }
  76
  77 #define __pte_free_tlb(tlb, pte, addr)                          \
  78         do {                                                    \
  79                 pgtable_page_dtor(pte);                         \
  80                 tlb_remove_page((tlb), (pte));                  \
  81         } while (0)
  82
  83 #define check_pgt_cache()       do { } while (0)
  84
  85 #endif /* _ASM_NIOS2_PGALLOC_H */