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
13 #include <asm-generic/hugetlb.h>
16 static inline int is_hugepage_only_range(struct mm_struct *mm,
23 static inline int prepare_hugepage_range(struct file *file,
27 unsigned long task_size = STACK_TOP;
28 struct hstate *h = hstate_file(file);
30 if (len & ~huge_page_mask(h))
32 if (addr & ~huge_page_mask(h))
36 if (task_size - len < addr)
41 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
45 unsigned long ceiling)
47 free_pgd_range(tlb, addr, end, floor, ceiling);
50 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
51 pte_t *ptep, pte_t pte)
53 set_pte_at(mm, addr, ptep, pte);
56 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
57 unsigned long addr, pte_t *ptep)
62 pte_val(clear) = (unsigned long)invalid_pte_table;
63 set_pte_at(mm, addr, ptep, clear);
67 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
68 unsigned long addr, pte_t *ptep)
71 * clear the huge pte entry firstly, so that the other smp threads will
72 * not get old pte entry after finishing flush_tlb_page and before
73 * setting new huge pte entry
75 huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
76 flush_tlb_page(vma, addr);
79 static inline int huge_pte_none(pte_t pte)
81 unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL;
82 return !val || (val == (unsigned long)invalid_pte_table);
85 static inline pte_t huge_pte_wrprotect(pte_t pte)
87 return pte_wrprotect(pte);
90 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
91 unsigned long addr, pte_t *ptep)
93 ptep_set_wrprotect(mm, addr, ptep);
96 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
98 pte_t *ptep, pte_t pte,
101 int changed = !pte_same(*ptep, pte);
104 set_pte_at(vma->vm_mm, addr, ptep, pte);
106 * There could be some standard sized pages in there,
109 flush_tlb_range(vma, addr, addr + HPAGE_SIZE);
114 static inline pte_t huge_ptep_get(pte_t *ptep)
119 static inline void arch_clear_hugepage_flags(struct page *page)
123 #endif /* __ASM_HUGETLB_H */