2 * arch/arm64/include/asm/hugetlb.h
4 * Copyright (C) 2013 Linaro Ltd.
6 * Based on arch/x86/include/asm/hugetlb.h
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
18 #ifndef __ASM_HUGETLB_H
19 #define __ASM_HUGETLB_H
23 static inline pte_t huge_ptep_get(pte_t *ptep)
25 return READ_ONCE(*ptep);
28 static inline int is_hugepage_only_range(struct mm_struct *mm,
29 unsigned long addr, unsigned long len)
34 static inline int prepare_hugepage_range(struct file *file,
35 unsigned long addr, unsigned long len)
37 struct hstate *h = hstate_file(file);
38 if (len & ~huge_page_mask(h))
40 if (addr & ~huge_page_mask(h))
45 static inline int huge_pte_none(pte_t pte)
50 static inline pte_t huge_pte_wrprotect(pte_t pte)
52 return pte_wrprotect(pte);
55 static inline void arch_clear_hugepage_flags(struct page *page)
57 clear_bit(PG_dcache_clean, &page->flags);
60 extern pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
61 struct page *page, int writable);
62 #define arch_make_huge_pte arch_make_huge_pte
63 extern void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
64 pte_t *ptep, pte_t pte);
65 extern int huge_ptep_set_access_flags(struct vm_area_struct *vma,
66 unsigned long addr, pte_t *ptep,
67 pte_t pte, int dirty);
68 extern pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
69 unsigned long addr, pte_t *ptep);
70 extern void huge_ptep_set_wrprotect(struct mm_struct *mm,
71 unsigned long addr, pte_t *ptep);
72 extern void huge_ptep_clear_flush(struct vm_area_struct *vma,
73 unsigned long addr, pte_t *ptep);
74 #define __HAVE_ARCH_HUGE_PTE_CLEAR
75 extern void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
76 pte_t *ptep, unsigned long sz);
77 extern void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr,
78 pte_t *ptep, pte_t pte, unsigned long sz);
79 #define set_huge_swap_pte_at set_huge_swap_pte_at
81 #include <asm-generic/hugetlb.h>
83 #ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
84 static inline bool gigantic_page_supported(void) { return true; }
87 #endif /* __ASM_HUGETLB_H */