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084bd298 SC |
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. | |
084bd298 SC |
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 | ||
084bd298 | 29 | |
084bd298 SC |
30 | |
31 | static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, | |
32 | unsigned long addr, unsigned long end, | |
33 | unsigned long floor, | |
34 | unsigned long ceiling) | |
35 | { | |
36 | free_pgd_range(tlb, addr, end, floor, ceiling); | |
37 | } | |
38 | ||
39 | static inline int is_hugepage_only_range(struct mm_struct *mm, | |
40 | unsigned long addr, unsigned long len) | |
41 | { | |
42 | return 0; | |
43 | } | |
44 | ||
45 | static inline int prepare_hugepage_range(struct file *file, | |
46 | unsigned long addr, unsigned long len) | |
47 | { | |
48 | struct hstate *h = hstate_file(file); | |
49 | if (len & ~huge_page_mask(h)) | |
50 | return -EINVAL; | |
51 | if (addr & ~huge_page_mask(h)) | |
52 | return -EINVAL; | |
53 | return 0; | |
54 | } | |
55 | ||
084bd298 SC |
56 | static inline int huge_pte_none(pte_t pte) |
57 | { | |
58 | return pte_none(pte); | |
59 | } | |
60 | ||
61 | static inline pte_t huge_pte_wrprotect(pte_t pte) | |
62 | { | |
63 | return pte_wrprotect(pte); | |
64 | } | |
65 | ||
084bd298 SC |
66 | static inline void arch_clear_hugepage_flags(struct page *page) |
67 | { | |
68 | clear_bit(PG_dcache_clean, &page->flags); | |
69 | } | |
70 | ||
66b3923a DW |
71 | extern pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, |
72 | struct page *page, int writable); | |
73 | #define arch_make_huge_pte arch_make_huge_pte | |
74 | extern void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, | |
75 | pte_t *ptep, pte_t pte); | |
76 | extern int huge_ptep_set_access_flags(struct vm_area_struct *vma, | |
77 | unsigned long addr, pte_t *ptep, | |
78 | pte_t pte, int dirty); | |
79 | extern pte_t huge_ptep_get_and_clear(struct mm_struct *mm, | |
80 | unsigned long addr, pte_t *ptep); | |
81 | extern void huge_ptep_set_wrprotect(struct mm_struct *mm, | |
82 | unsigned long addr, pte_t *ptep); | |
83 | extern void huge_ptep_clear_flush(struct vm_area_struct *vma, | |
84 | unsigned long addr, pte_t *ptep); | |
85 | ||
e1073d1e AK |
86 | #ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE |
87 | static inline bool gigantic_page_supported(void) { return true; } | |
88 | #endif | |
89 | ||
084bd298 | 90 | #endif /* __ASM_HUGETLB_H */ |