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