tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
15static inline int is_hugepage_only_range(struct mm_struct *mm,
16 unsigned long addr,
17 unsigned long len)
18{
19 return 0;
20}
21
22static 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
40static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
41{
42}
43
44static 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
53static 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
59static 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
70static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
71 unsigned long addr, pte_t *ptep)
72{
73 flush_tlb_mm(vma->vm_mm);
74}
75
76static 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
82static inline pte_t huge_pte_wrprotect(pte_t pte)
83{
84 return pte_wrprotect(pte);
85}
86
87static 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
93static 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
101static inline pte_t huge_ptep_get(pte_t *ptep)
102{
103 return *ptep;
104}
105
106static inline int arch_prepare_hugepage(struct page *page)
107{
108 return 0;
109}
110
111static inline void arch_release_hugepage(struct page *page)
112{
113}
114
115#endif /* __ASM_HUGETLB_H */