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(unsigned long addr, unsigned long len)
  25 {
  26         if (len & ~HPAGE_MASK)
  27                 return -EINVAL;
  28         if (addr & ~HPAGE_MASK)
  29                 return -EINVAL;
  30         return 0;
  31 }
  32
  33 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
  34 {
  35 }
  36
  37 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  38                                          unsigned long addr, pte_t *ptep)
  39 {
  40 }
  41
  42 static inline int huge_pte_none(pte_t pte)
  43 {
  44         return pte_none(pte);
  45 }
  46
  47 static inline pte_t huge_pte_wrprotect(pte_t pte)
  48 {
  49         return pte_wrprotect(pte);
  50 }
  51
  52 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  53                                              unsigned long addr, pte_t *ptep,
  54                                              pte_t pte, int dirty)
  55 {
  56         return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
  57 }
  58
  59 static inline pte_t huge_ptep_get(pte_t *ptep)
  60 {
  61         return *ptep;
  62 }
  63
  64 static inline int arch_prepare_hugepage(struct page *page)
  65 {
  66         return 0;
  67 }
  68
  69 static inline void arch_release_hugepage(struct page *page)
  70 {
  71 }
  72
  73 #endif /* _ASM_POWERPC_HUGETLB_H */