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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 | ||
41 | static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm) | |
42 | { | |
43 | } | |
44 | ||
45 | static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, | |
46 | unsigned long addr, | |
47 | unsigned long end, | |
48 | unsigned long floor, | |
49 | unsigned long ceiling) | |
50 | { | |
51 | free_pgd_range(tlb, addr, end, floor, ceiling); | |
52 | } | |
53 | ||
54 | static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, | |
55 | pte_t *ptep, pte_t pte) | |
56 | { | |
57 | set_pte_at(mm, addr, ptep, pte); | |
58 | } | |
59 | ||
60 | static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, | |
61 | unsigned long addr, pte_t *ptep) | |
62 | { | |
63 | pte_t clear; | |
64 | pte_t pte = *ptep; | |
65 | ||
66 | pte_val(clear) = (unsigned long)invalid_pte_table; | |
67 | set_pte_at(mm, addr, ptep, clear); | |
68 | return pte; | |
69 | } | |
70 | ||
71 | static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, | |
72 | unsigned long addr, pte_t *ptep) | |
73 | { | |
5639bc4a | 74 | flush_tlb_page(vma, addr & huge_page_mask(hstate_vma(vma))); |
50a41ff2 DD |
75 | } |
76 | ||
77 | static inline int huge_pte_none(pte_t pte) | |
78 | { | |
79 | unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL; | |
80 | return !val || (val == (unsigned long)invalid_pte_table); | |
81 | } | |
82 | ||
83 | static inline pte_t huge_pte_wrprotect(pte_t pte) | |
84 | { | |
85 | return pte_wrprotect(pte); | |
86 | } | |
87 | ||
88 | static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, | |
89 | unsigned long addr, pte_t *ptep) | |
90 | { | |
91 | ptep_set_wrprotect(mm, addr, ptep); | |
92 | } | |
93 | ||
94 | static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, | |
95 | unsigned long addr, | |
96 | pte_t *ptep, pte_t pte, | |
97 | int dirty) | |
98 | { | |
ac53c4fc DD |
99 | int changed = !pte_same(*ptep, pte); |
100 | ||
101 | if (changed) { | |
102 | set_pte_at(vma->vm_mm, addr, ptep, pte); | |
103 | /* | |
104 | * There could be some standard sized pages in there, | |
105 | * get them all. | |
106 | */ | |
107 | flush_tlb_range(vma, addr, addr + HPAGE_SIZE); | |
108 | } | |
109 | return changed; | |
50a41ff2 DD |
110 | } |
111 | ||
112 | static inline pte_t huge_ptep_get(pte_t *ptep) | |
113 | { | |
114 | return *ptep; | |
115 | } | |
116 | ||
117 | static inline int arch_prepare_hugepage(struct page *page) | |
118 | { | |
119 | return 0; | |
120 | } | |
121 | ||
122 | static inline void arch_release_hugepage(struct page *page) | |
123 | { | |
124 | } | |
125 | ||
5d3a551c WD |
126 | static inline void arch_clear_hugepage_flags(struct page *page) |
127 | { | |
128 | } | |
129 | ||
50a41ff2 | 130 | #endif /* __ASM_HUGETLB_H */ |