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

   1#ifndef _ASM_SPARC64_HUGETLB_H
   2#define _ASM_SPARC64_HUGETLB_H
   3
   4#include <asm/page.h>
   5#include <asm-generic/hugetlb.h>
   6
   7
   8void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
   9                     pte_t *ptep, pte_t pte);
  10
  11pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
  12                              pte_t *ptep);
  13
  14static inline int is_hugepage_only_range(struct mm_struct *mm,
  15                                         unsigned long addr,
  16                                         unsigned long len) {
  17        return 0;
  18}
  19
  20/*
  21 * If the arch doesn't supply something else, assume that hugepage
  22 * size aligned regions are ok without further preparation.
  23 */
  24static inline int prepare_hugepage_range(struct file *file,
  25                        unsigned long addr, unsigned long len)
  26{
  27        if (len & ~HPAGE_MASK)
  28                return -EINVAL;
  29        if (addr & ~HPAGE_MASK)
  30                return -EINVAL;
  31        return 0;
  32}
  33
  34static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
  35                                          unsigned long addr, unsigned long end,
  36                                          unsigned long floor,
  37                                          unsigned long ceiling)
  38{
  39        free_pgd_range(tlb, addr, end, floor, ceiling);
  40}
  41
  42static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  43                                         unsigned long addr, pte_t *ptep)
  44{
  45}
  46
  47static inline int huge_pte_none(pte_t pte)
  48{
  49        return pte_none(pte);
  50}
  51
  52static inline pte_t huge_pte_wrprotect(pte_t pte)
  53{
  54        return pte_wrprotect(pte);
  55}
  56
  57static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
  58                                           unsigned long addr, pte_t *ptep)
  59{
  60        pte_t old_pte = *ptep;
  61        set_huge_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
  62}
  63
  64static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  65                                             unsigned long addr, pte_t *ptep,
  66                                             pte_t pte, int dirty)
  67{
  68        int changed = !pte_same(*ptep, pte);
  69        if (changed) {
  70                set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
  71                flush_tlb_page(vma, addr);
  72        }
  73        return changed;
  74}
  75
  76static inline pte_t huge_ptep_get(pte_t *ptep)
  77{
  78        return *ptep;
  79}
  80
  81static inline void arch_clear_hugepage_flags(struct page *page)
  82{
  83}
  84
  85#endif /* _ASM_SPARC64_HUGETLB_H */
  86