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
  18 #ifndef __ASM_HUGETLB_H
  19 #define __ASM_HUGETLB_H
  20
  21 #include <asm-generic/hugetlb.h>
  22 #include <asm/page.h>
  23
  24 static inline pte_t huge_ptep_get(pte_t *ptep)
  25 {
  26         return *ptep;
  27 }
  28
  29 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
  30                                    pte_t *ptep, pte_t pte)
  31 {
  32         set_pte_at(mm, addr, ptep, pte);
  33 }
  34
  35 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  36                                          unsigned long addr, pte_t *ptep)
  37 {
  38         ptep_clear_flush(vma, addr, ptep);
  39 }
  40
  41 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
  42                                            unsigned long addr, pte_t *ptep)
  43 {
  44         ptep_set_wrprotect(mm, addr, ptep);
  45 }
  46
  47 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
  48                                             unsigned long addr, pte_t *ptep)
  49 {
  50         return ptep_get_and_clear(mm, addr, ptep);
  51 }
  52
  53 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  54                                              unsigned long addr, pte_t *ptep,
  55                                              pte_t pte, int dirty)
  56 {
  57         return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
  58 }
  59
  60 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
  61                                           unsigned long addr, unsigned long end,
  62                                           unsigned long floor,
  63                                           unsigned long ceiling)
  64 {
  65         free_pgd_range(tlb, addr, end, floor, ceiling);
  66 }
  67
  68 static inline int is_hugepage_only_range(struct mm_struct *mm,
  69                                          unsigned long addr, unsigned long len)
  70 {
  71         return 0;
  72 }
  73
  74 static inline int prepare_hugepage_range(struct file *file,
  75                                          unsigned long addr, unsigned long len)
  76 {
  77         struct hstate *h = hstate_file(file);
  78         if (len & ~huge_page_mask(h))
  79                 return -EINVAL;
  80         if (addr & ~huge_page_mask(h))
  81                 return -EINVAL;
  82         return 0;
  83 }
  84
  85 static inline int huge_pte_none(pte_t pte)
  86 {
  87         return pte_none(pte);
  88 }
  89
  90 static inline pte_t huge_pte_wrprotect(pte_t pte)
  91 {
  92         return pte_wrprotect(pte);
  93 }
  94
  95 static inline void arch_clear_hugepage_flags(struct page *page)
  96 {
  97         clear_bit(PG_dcache_clean, &page->flags);
  98 }
  99
 100 #endif /* __ASM_HUGETLB_H */