LXR linux/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
   6pte_t *huge_pte_offset_and_shift(struct mm_struct *mm,
   7                                 unsigned long addr, unsigned *shift);
   8
   9void flush_dcache_icache_hugepage(struct page *page);
  10
  11int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
  12                           unsigned long len);
  13
  14void 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 */
  28static 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
  39static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
  40{
  41}
  42
  43
  44static 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
  50static 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
  57static 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
  65static inline int huge_pte_none(pte_t pte)
  66{
  67        return pte_none(pte);
  68}
  69
  70static inline pte_t huge_pte_wrprotect(pte_t pte)
  71{
  72        return pte_wrprotect(pte);
  73}
  74
  75static 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
  82static inline pte_t huge_ptep_get(pte_t *ptep)
  83{
  84        return *ptep;
  85}
  86
  87static inline int arch_prepare_hugepage(struct page *page)
  88{
  89        return 0;
  90}
  91
  92static inline void arch_release_hugepage(struct page *page)
  93{
  94}
  95
  96#endif /* _ASM_POWERPC_HUGETLB_H */
  97