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_REPEAT|__GFP_ZERO,
  46                                         PTE_ORDER);
  47
  48         return pte;
  49 }
  50
  51 static 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
  67 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  68 {
  69         free_pages((unsigned long)pte, PTE_ORDER);
  70 }
  71
  72 static 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 */