arch/powerpc/include/asm/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  * The version of vma_mmu_pagesize() in arch/powerpc/mm/hugetlbpage.c needs
  22  * to override the version in mm/hugetlb.c
  23  */
  24 #define vma_mmu_pagesize vma_mmu_pagesize
  25
  26 /*
  27  * If the arch doesn't supply something else, assume that hugepage
  28  * size aligned regions are ok without further preparation.
  29  */
  30 static inline int prepare_hugepage_range(struct file *file,
  31                         unsigned long addr, unsigned long len)
  32 {
  33         struct hstate *h = hstate_file(file);
  34         if (len & ~huge_page_mask(h))
  35                 return -EINVAL;
  36         if (addr & ~huge_page_mask(h))
  37                 return -EINVAL;
  38         return 0;
  39 }
  40
  41 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
  42 {
  43 }
  44
  45 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  46                                          unsigned long addr, pte_t *ptep)
  47 {
  48 }
  49
  50 static inline int huge_pte_none(pte_t pte)
  51 {
  52         return pte_none(pte);
  53 }
  54
  55 static inline pte_t huge_pte_wrprotect(pte_t pte)
  56 {
  57         return pte_wrprotect(pte);
  58 }
  59
  60 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  61                                              unsigned long addr, pte_t *ptep,
  62                                              pte_t pte, int dirty)
  63 {
  64         return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
  65 }
  66
  67 static inline pte_t huge_ptep_get(pte_t *ptep)
  68 {
  69         return *ptep;
  70 }
  71
  72 static inline int arch_prepare_hugepage(struct page *page)
  73 {
  74         return 0;
  75 }
  76
  77 static inline void arch_release_hugepage(struct page *page)
  78 {
  79 }
  80
  81 #endif /* _ASM_POWERPC_HUGETLB_H */