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50a41ff2 DD |
1 | /* |
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 | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 2008, 2009 Cavium Networks, Inc. | |
7 | */ | |
8 | ||
9 | #ifndef __ASM_HUGETLB_H | |
10 | #define __ASM_HUGETLB_H | |
11 | ||
12 | #include <asm/page.h> | |
106c992a | 13 | #include <asm-generic/hugetlb.h> |
50a41ff2 DD |
14 | |
15 | ||
16 | static inline int is_hugepage_only_range(struct mm_struct *mm, | |
17 | unsigned long addr, | |
18 | unsigned long len) | |
19 | { | |
20 | return 0; | |
21 | } | |
22 | ||
23 | static inline int prepare_hugepage_range(struct file *file, | |
24 | unsigned long addr, | |
25 | unsigned long len) | |
26 | { | |
27 | unsigned long task_size = STACK_TOP; | |
28 | struct hstate *h = hstate_file(file); | |
29 | ||
30 | if (len & ~huge_page_mask(h)) | |
31 | return -EINVAL; | |
32 | if (addr & ~huge_page_mask(h)) | |
33 | return -EINVAL; | |
34 | if (len > task_size) | |
35 | return -ENOMEM; | |
36 | if (task_size - len < addr) | |
37 | return -EINVAL; | |
38 | return 0; | |
39 | } | |
40 | ||
50a41ff2 DD |
41 | static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, |
42 | unsigned long addr, | |
43 | unsigned long end, | |
44 | unsigned long floor, | |
45 | unsigned long ceiling) | |
46 | { | |
47 | free_pgd_range(tlb, addr, end, floor, ceiling); | |
48 | } | |
49 | ||
50 | static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, | |
51 | pte_t *ptep, pte_t pte) | |
52 | { | |
53 | set_pte_at(mm, addr, ptep, pte); | |
54 | } | |
55 | ||
56 | static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, | |
57 | unsigned long addr, pte_t *ptep) | |
58 | { | |
59 | pte_t clear; | |
60 | pte_t pte = *ptep; | |
61 | ||
62 | pte_val(clear) = (unsigned long)invalid_pte_table; | |
63 | set_pte_at(mm, addr, ptep, clear); | |
64 | return pte; | |
65 | } | |
66 | ||
67 | static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, | |
68 | unsigned long addr, pte_t *ptep) | |
69 | { | |
5639bc4a | 70 | flush_tlb_page(vma, addr & huge_page_mask(hstate_vma(vma))); |
50a41ff2 DD |
71 | } |
72 | ||
73 | static inline int huge_pte_none(pte_t pte) | |
74 | { | |
75 | unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL; | |
76 | return !val || (val == (unsigned long)invalid_pte_table); | |
77 | } | |
78 | ||
79 | static inline pte_t huge_pte_wrprotect(pte_t pte) | |
80 | { | |
81 | return pte_wrprotect(pte); | |
82 | } | |
83 | ||
84 | static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, | |
85 | unsigned long addr, pte_t *ptep) | |
86 | { | |
87 | ptep_set_wrprotect(mm, addr, ptep); | |
88 | } | |
89 | ||
90 | static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, | |
91 | unsigned long addr, | |
92 | pte_t *ptep, pte_t pte, | |
93 | int dirty) | |
94 | { | |
ac53c4fc DD |
95 | int changed = !pte_same(*ptep, pte); |
96 | ||
97 | if (changed) { | |
98 | set_pte_at(vma->vm_mm, addr, ptep, pte); | |
99 | /* | |
100 | * There could be some standard sized pages in there, | |
101 | * get them all. | |
102 | */ | |
103 | flush_tlb_range(vma, addr, addr + HPAGE_SIZE); | |
104 | } | |
105 | return changed; | |
50a41ff2 DD |
106 | } |
107 | ||
108 | static inline pte_t huge_ptep_get(pte_t *ptep) | |
109 | { | |
110 | return *ptep; | |
111 | } | |
112 | ||
5d3a551c WD |
113 | static inline void arch_clear_hugepage_flags(struct page *page) |
114 | { | |
115 | } | |
116 | ||
50a41ff2 | 117 | #endif /* __ASM_HUGETLB_H */ |