1 #ifndef _ASM_POWERPC_HUGETLB_H
2 #define _ASM_POWERPC_HUGETLB_H
4 #ifdef CONFIG_HUGETLB_PAGE
7 extern struct kmem_cache *hugepte_cache;
8 extern void __init reserve_hugetlb_gpages(void);
10 static inline pte_t *hugepd_page(hugepd_t hpd)
12 BUG_ON(!hugepd_ok(hpd));
13 return (pte_t *)((hpd.pd & ~HUGEPD_SHIFT_MASK) | PD_HUGE);
16 static inline unsigned int hugepd_shift(hugepd_t hpd)
18 return hpd.pd & HUGEPD_SHIFT_MASK;
21 static inline pte_t *hugepte_offset(hugepd_t *hpdp, unsigned long addr,
25 * On 32-bit, we have multiple higher-level table entries that point to
26 * the same hugepte. Just use the first one since they're all
27 * identical. So for that case, idx=0.
29 unsigned long idx = 0;
31 pte_t *dir = hugepd_page(*hpdp);
33 idx = (addr & ((1UL << pdshift) - 1)) >> hugepd_shift(*hpdp);
39 pte_t *huge_pte_offset_and_shift(struct mm_struct *mm,
40 unsigned long addr, unsigned *shift);
42 void flush_dcache_icache_hugepage(struct page *page);
44 #if defined(CONFIG_PPC_MM_SLICES) || defined(CONFIG_PPC_SUBPAGE_PROT)
45 int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
48 static inline int is_hugepage_only_range(struct mm_struct *mm,
56 void book3e_hugetlb_preload(struct mm_struct *mm, unsigned long ea, pte_t pte);
57 void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
59 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
60 unsigned long end, unsigned long floor,
61 unsigned long ceiling);
64 * The version of vma_mmu_pagesize() in arch/powerpc/mm/hugetlbpage.c needs
65 * to override the version in mm/hugetlb.c
67 #define vma_mmu_pagesize vma_mmu_pagesize
70 * If the arch doesn't supply something else, assume that hugepage
71 * size aligned regions are ok without further preparation.
73 static inline int prepare_hugepage_range(struct file *file,
74 unsigned long addr, unsigned long len)
76 struct hstate *h = hstate_file(file);
77 if (len & ~huge_page_mask(h))
79 if (addr & ~huge_page_mask(h))
84 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
89 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
90 pte_t *ptep, pte_t pte)
92 set_pte_at(mm, addr, ptep, pte);
95 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
96 unsigned long addr, pte_t *ptep)
99 return __pte(pte_update(mm, addr, ptep, ~0UL, 1));
101 return __pte(pte_update(ptep, ~0UL, 0));
105 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
106 unsigned long addr, pte_t *ptep)
109 pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
110 flush_tlb_page(vma, addr);
113 static inline int huge_pte_none(pte_t pte)
115 return pte_none(pte);
118 static inline pte_t huge_pte_wrprotect(pte_t pte)
120 return pte_wrprotect(pte);
123 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
124 unsigned long addr, pte_t *ptep,
125 pte_t pte, int dirty)
127 return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
130 static inline pte_t huge_ptep_get(pte_t *ptep)
135 static inline int arch_prepare_hugepage(struct page *page)
140 static inline void arch_release_hugepage(struct page *page)
144 #else /* ! CONFIG_HUGETLB_PAGE */
145 static inline void reserve_hugetlb_gpages(void)
147 pr_err("Cannot reserve gpages without hugetlb enabled\n");
149 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
150 unsigned long vmaddr)
155 #endif /* _ASM_POWERPC_HUGETLB_H */