arch/parisc/include/asm/hugetlb.h

   1 #ifndef _ASM_PARISC64_HUGETLB_H
   2 #define _ASM_PARISC64_HUGETLB_H
   3
   4 #include <asm/page.h>
   5 #include <asm-generic/hugetlb.h>
   6
   7
   8 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
   9                      pte_t *ptep, pte_t pte);
  10
  11 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
  12                               pte_t *ptep);
  13
  14 static 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  */
  24 static 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
  34 static 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
  42 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  43                                          unsigned long addr, pte_t *ptep)
  44 {
  45 }
  46
  47 static inline int huge_pte_none(pte_t pte)
  48 {
  49         return pte_none(pte);
  50 }
  51
  52 static inline pte_t huge_pte_wrprotect(pte_t pte)
  53 {
  54         return pte_wrprotect(pte);
  55 }
  56
  57 static 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
  64 static 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
  76 static inline pte_t huge_ptep_get(pte_t *ptep)
  77 {
  78         return *ptep;
  79 }
  80
  81 static inline void arch_clear_hugepage_flags(struct page *page)
  82 {
  83 }
  84
  85 #endif /* _ASM_PARISC64_HUGETLB_H */