2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 2008, 2009 Cavium Networks, Inc.
9 #ifndef __ASM_HUGETLB_H
10 #define __ASM_HUGETLB_H
15 static inline int is_hugepage_only_range(struct mm_struct *mm,
22 static inline int prepare_hugepage_range(struct file *file,
26 unsigned long task_size = STACK_TOP;
27 struct hstate *h = hstate_file(file);
29 if (len & ~huge_page_mask(h))
31 if (addr & ~huge_page_mask(h))
35 if (task_size - len < addr)
40 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
44 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
48 unsigned long ceiling)
50 free_pgd_range(tlb, addr, end, floor, ceiling);
53 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
54 pte_t *ptep, pte_t pte)
56 set_pte_at(mm, addr, ptep, pte);
59 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
60 unsigned long addr, pte_t *ptep)
65 pte_val(clear) = (unsigned long)invalid_pte_table;
66 set_pte_at(mm, addr, ptep, clear);
70 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
71 unsigned long addr, pte_t *ptep)
75 static inline int huge_pte_none(pte_t pte)
77 unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL;
78 return !val || (val == (unsigned long)invalid_pte_table);
81 static inline pte_t huge_pte_wrprotect(pte_t pte)
83 return pte_wrprotect(pte);
86 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
87 unsigned long addr, pte_t *ptep)
89 ptep_set_wrprotect(mm, addr, ptep);
92 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
94 pte_t *ptep, pte_t pte,
97 return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
100 static inline pte_t huge_ptep_get(pte_t *ptep)
105 static inline int arch_prepare_hugepage(struct page *page)
110 static inline void arch_release_hugepage(struct page *page)
114 #endif /* __ASM_HUGETLB_H */