arch/arm64/include/asm/hugetlb.h

   1 /*
   2  * arch/arm64/include/asm/hugetlb.h
   3  *
   4  * Copyright (C) 2013 Linaro 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_HUGETLB_H
  23 #define __ASM_HUGETLB_H
  24
  25 #include <asm-generic/hugetlb.h>
  26 #include <asm/page.h>
  27
  28 static inline pte_t huge_ptep_get(pte_t *ptep)
  29 {
  30         return *ptep;
  31 }
  32
  33 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
  34                                    pte_t *ptep, pte_t pte)
  35 {
  36         set_pte_at(mm, addr, ptep, pte);
  37 }
  38
  39 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  40                                          unsigned long addr, pte_t *ptep)
  41 {
  42         ptep_clear_flush(vma, addr, ptep);
  43 }
  44
  45 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
  46                                            unsigned long addr, pte_t *ptep)
  47 {
  48         ptep_set_wrprotect(mm, addr, ptep);
  49 }
  50
  51 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
  52                                             unsigned long addr, pte_t *ptep)
  53 {
  54         return ptep_get_and_clear(mm, addr, ptep);
  55 }
  56
  57 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  58                                              unsigned long addr, pte_t *ptep,
  59                                              pte_t pte, int dirty)
  60 {
  61         return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
  62 }
  63
  64 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
  65                                           unsigned long addr, unsigned long end,
  66                                           unsigned long floor,
  67                                           unsigned long ceiling)
  68 {
  69         free_pgd_range(tlb, addr, end, floor, ceiling);
  70 }
  71
  72 static inline int is_hugepage_only_range(struct mm_struct *mm,
  73                                          unsigned long addr, unsigned long len)
  74 {
  75         return 0;
  76 }
  77
  78 static inline int prepare_hugepage_range(struct file *file,
  79                                          unsigned long addr, unsigned long len)
  80 {
  81         struct hstate *h = hstate_file(file);
  82         if (len & ~huge_page_mask(h))
  83                 return -EINVAL;
  84         if (addr & ~huge_page_mask(h))
  85                 return -EINVAL;
  86         return 0;
  87 }
  88
  89 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
  90 {
  91 }
  92
  93 static inline int huge_pte_none(pte_t pte)
  94 {
  95         return pte_none(pte);
  96 }
  97
  98 static inline pte_t huge_pte_wrprotect(pte_t pte)
  99 {
 100         return pte_wrprotect(pte);
 101 }
 102
 103 static inline int arch_prepare_hugepage(struct page *page)
 104 {
 105         return 0;
 106 }
 107
 108 static inline void arch_release_hugepage(struct page *page)
 109 {
 110 }
 111
 112 static inline void arch_clear_hugepage_flags(struct page *page)
 113 {
 114         clear_bit(PG_dcache_clean, &page->flags);
 115 }
 116
 117 #endif /* __ASM_HUGETLB_H */