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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> | |
13 | ||
14 | ||
15 | static inline int is_hugepage_only_range(struct mm_struct *mm, | |
16 | unsigned long addr, | |
17 | unsigned long len) | |
18 | { | |
19 | return 0; | |
20 | } | |
21 | ||
22 | static inline int prepare_hugepage_range(struct file *file, | |
23 | unsigned long addr, | |
24 | unsigned long len) | |
25 | { | |
26 | unsigned long task_size = STACK_TOP; | |
27 | struct hstate *h = hstate_file(file); | |
28 | ||
29 | if (len & ~huge_page_mask(h)) | |
30 | return -EINVAL; | |
31 | if (addr & ~huge_page_mask(h)) | |
32 | return -EINVAL; | |
33 | if (len > task_size) | |
34 | return -ENOMEM; | |
35 | if (task_size - len < addr) | |
36 | return -EINVAL; | |
37 | return 0; | |
38 | } | |
39 | ||
40 | static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm) | |
41 | { | |
42 | } | |
43 | ||
44 | static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, | |
45 | unsigned long addr, | |
46 | unsigned long end, | |
47 | unsigned long floor, | |
48 | unsigned long ceiling) | |
49 | { | |
50 | free_pgd_range(tlb, addr, end, floor, ceiling); | |
51 | } | |
52 | ||
53 | static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, | |
54 | pte_t *ptep, pte_t pte) | |
55 | { | |
56 | set_pte_at(mm, addr, ptep, pte); | |
57 | } | |
58 | ||
59 | static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, | |
60 | unsigned long addr, pte_t *ptep) | |
61 | { | |
62 | pte_t clear; | |
63 | pte_t pte = *ptep; | |
64 | ||
65 | pte_val(clear) = (unsigned long)invalid_pte_table; | |
66 | set_pte_at(mm, addr, ptep, clear); | |
67 | return pte; | |
68 | } | |
69 | ||
70 | static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, | |
71 | unsigned long addr, pte_t *ptep) | |
72 | { | |
5639bc4a | 73 | flush_tlb_page(vma, addr & huge_page_mask(hstate_vma(vma))); |
50a41ff2 DD |
74 | } |
75 | ||
76 | static inline int huge_pte_none(pte_t pte) | |
77 | { | |
78 | unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL; | |
79 | return !val || (val == (unsigned long)invalid_pte_table); | |
80 | } | |
81 | ||
82 | static inline pte_t huge_pte_wrprotect(pte_t pte) | |
83 | { | |
84 | return pte_wrprotect(pte); | |
85 | } | |
86 | ||
87 | static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, | |
88 | unsigned long addr, pte_t *ptep) | |
89 | { | |
90 | ptep_set_wrprotect(mm, addr, ptep); | |
91 | } | |
92 | ||
93 | static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, | |
94 | unsigned long addr, | |
95 | pte_t *ptep, pte_t pte, | |
96 | int dirty) | |
97 | { | |
98 | return ptep_set_access_flags(vma, addr, ptep, pte, dirty); | |
99 | } | |
100 | ||
101 | static inline pte_t huge_ptep_get(pte_t *ptep) | |
102 | { | |
103 | return *ptep; | |
104 | } | |
105 | ||
106 | static inline int arch_prepare_hugepage(struct page *page) | |
107 | { | |
108 | return 0; | |
109 | } | |
110 | ||
111 | static inline void arch_release_hugepage(struct page *page) | |
112 | { | |
113 | } | |
114 | ||
115 | #endif /* __ASM_HUGETLB_H */ |