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 <asm/processor.h>
  12 #include <linux/threads.h>
  13 #include <linux/slab.h>
  14 #include <linux/mm.h>
  15
  16 #define pmd_populate_kernel(mm, pmd, pte) \
  17         set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
  18
  19 static __inline__ void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
  20                                     struct page *pte)
  21 {
  22         set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
  23 }
  24
  25 /*
  26  * Allocate and free page tables
  27  */
  28 static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm)
  29 {
  30         return kcalloc(USER_PTRS_PER_PGD, sizeof(pgd_t), GFP_KERNEL);
  31 }
  32
  33 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
  34 {
  35         kfree(pgd);
  36 }
  37
  38 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
  39                                           unsigned long address)
  40 {
  41         pte_t *pte;
  42
  43         pte = (pte_t *)get_zeroed_page(GFP_KERNEL | __GFP_REPEAT);
  44
  45         return pte;
  46 }
  47
  48 static inline struct page *pte_alloc_one(struct mm_struct *mm,
  49                                          unsigned long address)
  50 {
  51         struct page *pte;
  52
  53         pte = alloc_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
  54
  55         return pte;
  56 }
  57
  58 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  59 {
  60         free_page((unsigned long)pte);
  61 }
  62
  63 static inline void pte_free(struct mm_struct *mm, struct page *pte)
  64 {
  65         __free_page(pte);
  66 }
  67
  68 #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
  69
  70 #define check_pgt_cache() do { } while(0)
  71
  72 #endif /* __ASM_AVR32_PGALLOC_H */