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
  30 static 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
  39 static inline int is_hugepage_only_range(struct mm_struct *mm,
  40                                          unsigned long addr, unsigned long len)
  41 {
  42         return 0;
  43 }
  44
  45 static 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
  56 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
  57 {
  58 }
  59
  60 static inline int huge_pte_none(pte_t pte)
  61 {
  62         return pte_none(pte);
  63 }
  64
  65 static inline pte_t huge_pte_wrprotect(pte_t pte)
  66 {
  67         return pte_wrprotect(pte);
  68 }
  69
  70 static inline int arch_prepare_hugepage(struct page *page)
  71 {
  72         return 0;
  73 }
  74
  75 static inline void arch_release_hugepage(struct page *page)
  76 {
  77 }
  78
  79 static 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 */