LXR linux/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#include <asm-generic/hugetlb.h>
   6
   7
   8void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
   9                     pte_t *ptep, pte_t pte);
  10
  11pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
  12                              pte_t *ptep);
  13
  14static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
  15{
  16}
  17
  18static 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 */
  28static 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
  38static 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
  46static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  47                                         unsigned long addr, pte_t *ptep)
  48{
  49}
  50
  51static inline int huge_pte_none(pte_t pte)
  52{
  53        return pte_none(pte);
  54}
  55
  56static inline pte_t huge_pte_wrprotect(pte_t pte)
  57{
  58        return pte_wrprotect(pte);
  59}
  60
  61static 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
  68static 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
  80static inline pte_t huge_ptep_get(pte_t *ptep)
  81{
  82        return *ptep;
  83}
  84
  85static inline int arch_prepare_hugepage(struct page *page)
  86{
  87        return 0;
  88}
  89
  90static inline void arch_release_hugepage(struct page *page)
  91{
  92}
  93
  94static inline void arch_clear_hugepage_flags(struct page *page)
  95{
  96}
  97
  98#endif /* _ASM_SPARC64_HUGETLB_H */
  99