include/asm-powerpc/hugetlb.h

   1 #ifndef _ASM_POWERPC_HUGETLB_H
   2 #define _ASM_POWERPC_HUGETLB_H
   3
   4 #include <asm/page.h>
   5
   6
   7 int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
   8                            unsigned long len);
   9
  10 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
  11                             unsigned long end, unsigned long floor,
  12                             unsigned long ceiling);
  13
  14 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
  15                      pte_t *ptep, pte_t pte);
  16
  17 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
  18                               pte_t *ptep);
  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         struct hstate *h = hstate_file(file);
  28         if (len & ~huge_page_mask(h))
  29                 return -EINVAL;
  30         if (addr & ~huge_page_mask(h))
  31                 return -EINVAL;
  32         return 0;
  33 }
  34
  35 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
  36 {
  37 }
  38
  39 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  40                                          unsigned long addr, pte_t *ptep)
  41 {
  42 }
  43
  44 static inline int huge_pte_none(pte_t pte)
  45 {
  46         return pte_none(pte);
  47 }
  48
  49 static inline pte_t huge_pte_wrprotect(pte_t pte)
  50 {
  51         return pte_wrprotect(pte);
  52 }
  53
  54 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  55                                              unsigned long addr, pte_t *ptep,
  56                                              pte_t pte, int dirty)
  57 {
  58         return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
  59 }
  60
  61 static inline pte_t huge_ptep_get(pte_t *ptep)
  62 {
  63         return *ptep;
  64 }
  65
  66 static inline int arch_prepare_hugepage(struct page *page)
  67 {
  68         return 0;
  69 }
  70
  71 static inline void arch_release_hugepage(struct page *page)
  72 {
  73 }
  74
  75 #endif /* _ASM_POWERPC_HUGETLB_H */