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1 /*
2  * arch/arm64/include/asm/hugetlb.h
3  *
4  * Copyright (C) 2013 Linaro Ltd.
5  *
6  * Based on arch/x86/include/asm/hugetlb.h
7  *
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.
11  *
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.
16  */
17
18 #ifndef __ASM_HUGETLB_H
19 #define __ASM_HUGETLB_H
20
21 #include <asm-generic/hugetlb.h>
22 #include <asm/page.h>
23
24 static inline pte_t huge_ptep_get(pte_t *ptep)
25 {
26         return *ptep;
27 }
28
29 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
30                                    pte_t *ptep, pte_t pte)
31 {
32         set_pte_at(mm, addr, ptep, pte);
33 }
34
35 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
36                                          unsigned long addr, pte_t *ptep)
37 {
38         ptep_clear_flush(vma, addr, ptep);
39 }
40
41 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
42                                            unsigned long addr, pte_t *ptep)
43 {
44         ptep_set_wrprotect(mm, addr, ptep);
45 }
46
47 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
48                                             unsigned long addr, pte_t *ptep)
49 {
50         return ptep_get_and_clear(mm, addr, ptep);
51 }
52
53 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
54                                              unsigned long addr, pte_t *ptep,
55                                              pte_t pte, int dirty)
56 {
57         return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
58 }
59
60 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
61                                           unsigned long addr, unsigned long end,
62                                           unsigned long floor,
63                                           unsigned long ceiling)
64 {
65         free_pgd_range(tlb, addr, end, floor, ceiling);
66 }
67
68 static inline int is_hugepage_only_range(struct mm_struct *mm,
69                                          unsigned long addr, unsigned long len)
70 {
71         return 0;
72 }
73
74 static inline int prepare_hugepage_range(struct file *file,
75                                          unsigned long addr, unsigned long len)
76 {
77         struct hstate *h = hstate_file(file);
78         if (len & ~huge_page_mask(h))
79                 return -EINVAL;
80         if (addr & ~huge_page_mask(h))
81                 return -EINVAL;
82         return 0;
83 }
84
85 static inline int huge_pte_none(pte_t pte)
86 {
87         return pte_none(pte);
88 }
89
90 static inline pte_t huge_pte_wrprotect(pte_t pte)
91 {
92         return pte_wrprotect(pte);
93 }
94
95 static inline void arch_clear_hugepage_flags(struct page *page)
96 {
97         clear_bit(PG_dcache_clean, &page->flags);
98 }
99
100 #endif /* __ASM_HUGETLB_H */