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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#define __HAVE_ARCH_PREPARE_HUGEPAGE_RANGE
15static inline int prepare_hugepage_range(struct file *file,
16 unsigned long addr,
17 unsigned long len)
18{
19 unsigned long task_size = STACK_TOP;
20 struct hstate *h = hstate_file(file);
21
22 if (len & ~huge_page_mask(h))
23 return -EINVAL;
24 if (addr & ~huge_page_mask(h))
25 return -EINVAL;
26 if (len > task_size)
27 return -ENOMEM;
28 if (task_size - len < addr)
29 return -EINVAL;
30 return 0;
31}
32
33#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
34static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
35 unsigned long addr, pte_t *ptep)
36{
37 pte_t clear;
38 pte_t pte = *ptep;
39
40 pte_val(clear) = (unsigned long)invalid_pte_table;
41 set_pte_at(mm, addr, ptep, clear);
42 return pte;
43}
44
45#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
46static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
47 unsigned long addr, pte_t *ptep)
48{
49 flush_tlb_page(vma, addr & huge_page_mask(hstate_vma(vma)));
50}
51
52#define __HAVE_ARCH_HUGE_PTE_NONE
53static inline int huge_pte_none(pte_t pte)
54{
55 unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL;
56 return !val || (val == (unsigned long)invalid_pte_table);
57}
58
59#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
60static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
61 unsigned long addr,
62 pte_t *ptep, pte_t pte,
63 int dirty)
64{
65 int changed = !pte_same(*ptep, pte);
66
67 if (changed) {
68 set_pte_at(vma->vm_mm, addr, ptep, pte);
69 /*
70 * There could be some standard sized pages in there,
71 * get them all.
72 */
73 flush_tlb_range(vma, addr, addr + HPAGE_SIZE);
74 }
75 return changed;
76}
77
78#include <asm-generic/hugetlb.h>
79
80#endif /* __ASM_HUGETLB_H */
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#include <asm-generic/hugetlb.h>
14
15
16static inline int is_hugepage_only_range(struct mm_struct *mm,
17 unsigned long addr,
18 unsigned long len)
19{
20 return 0;
21}
22
23static 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
41static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
42{
43}
44
45static 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
54static 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
60static 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
71static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
72 unsigned long addr, pte_t *ptep)
73{
74 flush_tlb_page(vma, addr & huge_page_mask(hstate_vma(vma)));
75}
76
77static 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
83static inline pte_t huge_pte_wrprotect(pte_t pte)
84{
85 return pte_wrprotect(pte);
86}
87
88static 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
94static 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{
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;
110}
111
112static inline pte_t huge_ptep_get(pte_t *ptep)
113{
114 return *ptep;
115}
116
117static inline int arch_prepare_hugepage(struct page *page)
118{
119 return 0;
120}
121
122static inline void arch_release_hugepage(struct page *page)
123{
124}
125
126static inline void arch_clear_hugepage_flags(struct page *page)
127{
128}
129
130#endif /* __ASM_HUGETLB_H */