LXR linux/arch/arm/include/asm/hugetlb.h

   1/*
   2 * arch/arm/include/asm/hugetlb.h
   3 *
   4 * Copyright (C) 2012 ARM Ltd.
   5 *
   6 * Based on arch/x86/include/asm/hugetlb.h
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License version 2 as
  10 * published by the Free Software Foundation.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20 */
  21
  22#ifndef _ASM_ARM_HUGETLB_H
  23#define _ASM_ARM_HUGETLB_H
  24
  25#include <asm/page.h>
  26#include <asm-generic/hugetlb.h>
  27
  28#include <asm/hugetlb-3level.h>
  29
  30static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
  31                                          unsigned long addr, unsigned long end,
  32                                          unsigned long floor,
  33                                          unsigned long ceiling)
  34{
  35        free_pgd_range(tlb, addr, end, floor, ceiling);
  36}
  37
  38
  39static inline int is_hugepage_only_range(struct mm_struct *mm,
  40                                         unsigned long addr, unsigned long len)
  41{
  42        return 0;
  43}
  44
  45static inline int prepare_hugepage_range(struct file *file,
  46                                         unsigned long addr, unsigned long len)
  47{
  48        struct hstate *h = hstate_file(file);
  49        if (len & ~huge_page_mask(h))
  50                return -EINVAL;
  51        if (addr & ~huge_page_mask(h))
  52                return -EINVAL;
  53        return 0;
  54}
  55
  56static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
  57{
  58}
  59
  60static inline int huge_pte_none(pte_t pte)
  61{
  62        return pte_none(pte);
  63}
  64
  65static inline pte_t huge_pte_wrprotect(pte_t pte)
  66{
  67        return pte_wrprotect(pte);
  68}
  69
  70static inline int arch_prepare_hugepage(struct page *page)
  71{
  72        return 0;
  73}
  74
  75static inline void arch_release_hugepage(struct page *page)
  76{
  77}
  78
  79static inline void arch_clear_hugepage_flags(struct page *page)
  80{
  81        clear_bit(PG_dcache_clean, &page->flags);
  82}
  83
  84#endif /* _ASM_ARM_HUGETLB_H */
  85