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 pte_t *huge_pte_offset_and_shift(struct mm_struct *mm,
   7                                  unsigned long addr, unsigned *shift);
   8
   9 void flush_dcache_icache_hugepage(struct page *page);
  10
  11 int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
  12                            unsigned long len);
  13
  14 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
  15                             unsigned long end, unsigned long floor,
  16                             unsigned long ceiling);
  17
  18 /*
  19  * The version of vma_mmu_pagesize() in arch/powerpc/mm/hugetlbpage.c needs
  20  * to override the version in mm/hugetlb.c
  21  */
  22 #define vma_mmu_pagesize vma_mmu_pagesize
  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         struct hstate *h = hstate_file(file);
  32         if (len & ~huge_page_mask(h))
  33                 return -EINVAL;
  34         if (addr & ~huge_page_mask(h))
  35                 return -EINVAL;
  36         return 0;
  37 }
  38
  39 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
  40 {
  41 }
  42
  43
  44 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
  45                                    pte_t *ptep, pte_t pte)
  46 {
  47         set_pte_at(mm, addr, ptep, pte);
  48 }
  49
  50 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
  51                                             unsigned long addr, pte_t *ptep)
  52 {
  53         unsigned long old = pte_update(mm, addr, ptep, ~0UL, 1);
  54         return __pte(old);
  55 }
  56
  57 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  58                                          unsigned long addr, pte_t *ptep)
  59 {
  60         pte_t pte;
  61         pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
  62         flush_tlb_page(vma, addr);
  63 }
  64
  65 static inline int huge_pte_none(pte_t pte)
  66 {
  67         return pte_none(pte);
  68 }
  69
  70 static inline pte_t huge_pte_wrprotect(pte_t pte)
  71 {
  72         return pte_wrprotect(pte);
  73 }
  74
  75 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  76                                              unsigned long addr, pte_t *ptep,
  77                                              pte_t pte, int dirty)
  78 {
  79         return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
  80 }
  81
  82 static inline pte_t huge_ptep_get(pte_t *ptep)
  83 {
  84         return *ptep;
  85 }
  86
  87 static inline int arch_prepare_hugepage(struct page *page)
  88 {
  89         return 0;
  90 }
  91
  92 static inline void arch_release_hugepage(struct page *page)
  93 {
  94 }
  95
  96 #endif /* _ASM_POWERPC_HUGETLB_H */