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
  30
  31 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
  32                                           unsigned long addr, unsigned long end,
  33                                           unsigned long floor,
  34                                           unsigned long ceiling)
  35 {
  36         free_pgd_range(tlb, addr, end, floor, ceiling);
  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 int huge_pte_none(pte_t pte)
  57 {
  58         return pte_none(pte);
  59 }
  60
  61 static inline pte_t huge_pte_wrprotect(pte_t pte)
  62 {
  63         return pte_wrprotect(pte);
  64 }
  65
  66 static inline void arch_clear_hugepage_flags(struct page *page)
  67 {
  68         clear_bit(PG_dcache_clean, &page->flags);
  69 }
  70
  71 extern pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
  72                                 struct page *page, int writable);
  73 #define arch_make_huge_pte arch_make_huge_pte
  74 extern void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
  75                             pte_t *ptep, pte_t pte);
  76 extern int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  77                                       unsigned long addr, pte_t *ptep,
  78                                       pte_t pte, int dirty);
  79 extern pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
  80                                      unsigned long addr, pte_t *ptep);
  81 extern void huge_ptep_set_wrprotect(struct mm_struct *mm,
  82                                     unsigned long addr, pte_t *ptep);
  83 extern void huge_ptep_clear_flush(struct vm_area_struct *vma,
  84                                   unsigned long addr, pte_t *ptep);
  85
  86 #endif /* __ASM_HUGETLB_H */