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
   6
   7 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
   8                      pte_t *ptep, pte_t pte);
   9
  10 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
  11                               pte_t *ptep);
  12
  13 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
  14 {
  15         hugetlb_setup(mm);
  16 }
  17
  18 static inline int is_hugepage_only_range(struct mm_struct *mm,
  19                                          unsigned long addr,
  20                                          unsigned long len) {
  21         return 0;
  22 }
  23
  24 /*
  25  * If the arch doesn't supply something else, assume that hugepage
  26  * size aligned regions are ok without further preparation.
  27  */
  28 static inline int prepare_hugepage_range(struct file *file,
  29                         unsigned long addr, unsigned long len)
  30 {
  31         if (len & ~HPAGE_MASK)
  32                 return -EINVAL;
  33         if (addr & ~HPAGE_MASK)
  34                 return -EINVAL;
  35         return 0;
  36 }
  37
  38 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
  39                                           unsigned long addr, unsigned long end,
  40                                           unsigned long floor,
  41                                           unsigned long ceiling)
  42 {
  43         free_pgd_range(tlb, addr, end, floor, ceiling);
  44 }
  45
  46 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  47                                          unsigned long addr, pte_t *ptep)
  48 {
  49 }
  50
  51 static inline int huge_pte_none(pte_t pte)
  52 {
  53         return pte_none(pte);
  54 }
  55
  56 static inline pte_t huge_pte_wrprotect(pte_t pte)
  57 {
  58         return pte_wrprotect(pte);
  59 }
  60
  61 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
  62                                            unsigned long addr, pte_t *ptep)
  63 {
  64         pte_t old_pte = *ptep;
  65         set_huge_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
  66 }
  67
  68 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  69                                              unsigned long addr, pte_t *ptep,
  70                                              pte_t pte, int dirty)
  71 {
  72         int changed = !pte_same(*ptep, pte);
  73         if (changed) {
  74                 set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
  75                 flush_tlb_page(vma, addr);
  76         }
  77         return changed;
  78 }
  79
  80 static inline pte_t huge_ptep_get(pte_t *ptep)
  81 {
  82         return *ptep;
  83 }
  84
  85 static inline int arch_prepare_hugepage(struct page *page)
  86 {
  87         return 0;
  88 }
  89
  90 static inline void arch_release_hugepage(struct page *page)
  91 {
  92 }
  93
  94 static inline void arch_clear_hugepage_flags(struct page *page)
  95 {
  96 }
  97
  98 #endif /* _ASM_SPARC64_HUGETLB_H */