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review.shift-gmbh.com / SHIFTPHONES / kernel / common / 621b19551507c8fd9d721f4038509c5bb155a983 / . / arch / tile / include / asm / hugetlb.h
blob: b2042380a5aab580011e54c436fc24ccc02e9366 [file] [log] [blame]
Chris Metcalf867e3592010-05-28 23:09:12 -0400[diff] [blame]1/*
2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation, version 2.
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 * NON INFRINGEMENT. See the GNU General Public License for
12 * more details.
13 */
14
15#ifndef _ASM_TILE_HUGETLB_H
16#define _ASM_TILE_HUGETLB_H
17
18#include <asm/page.h>
19
20
21static inline int is_hugepage_only_range(struct mm_struct *mm,
22 unsigned long addr,
23 unsigned long len) {
24 return 0;
25}
26
27/*
28 * If the arch doesn't supply something else, assume that hugepage
29 * size aligned regions are ok without further preparation.
30 */
31static inline int prepare_hugepage_range(struct file *file,
32 unsigned long addr, unsigned long len)
33{
34 struct hstate *h = hstate_file(file);
35 if (len & ~huge_page_mask(h))
36 return -EINVAL;
37 if (addr & ~huge_page_mask(h))
38 return -EINVAL;
39 return 0;
40}
41
42static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
43{
44}
45
46static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
47 unsigned long addr, 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{
Chris Metcalf76c567f2011-02-28 16:37:34 -0500[diff] [blame]57 set_pte(ptep, pte);
Chris Metcalf867e3592010-05-28 23:09:12 -0400[diff] [blame]58}
59
60static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
61 unsigned long addr, pte_t *ptep)
62{
63 return ptep_get_and_clear(mm, addr, ptep);
64}
65
66static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
67 unsigned long addr, pte_t *ptep)
68{
69 ptep_clear_flush(vma, addr, ptep);
70}
71
72static inline int huge_pte_none(pte_t pte)
73{
74 return pte_none(pte);
75}
76
77static inline pte_t huge_pte_wrprotect(pte_t pte)
78{
79 return pte_wrprotect(pte);
80}
81
82static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
83 unsigned long addr, pte_t *ptep)
84{
85 ptep_set_wrprotect(mm, addr, ptep);
86}
87
88static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
89 unsigned long addr, pte_t *ptep,
90 pte_t pte, int dirty)
91{
92 return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
93}
94
95static inline pte_t huge_ptep_get(pte_t *ptep)
96{
97 return *ptep;
98}
99
100static inline int arch_prepare_hugepage(struct page *page)
101{
102 return 0;
103}
104
105static inline void arch_release_hugepage(struct page *page)
106{
107}
108
Chris Metcalf621b1952012-04-01 14:04:21 -0400[diff] [blame^]109#ifdef CONFIG_HUGETLB_SUPER_PAGES
110static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
111 struct page *page, int writable)
112{
113 size_t pagesize = huge_page_size(hstate_vma(vma));
114 if (pagesize != PUD_SIZE && pagesize != PMD_SIZE)
115 entry = pte_mksuper(entry);
116 return entry;
117}
118#define arch_make_huge_pte arch_make_huge_pte
119
120/* Sizes to scale up page size for PTEs with HV_PTE_SUPER bit. */
121enum {
122 HUGE_SHIFT_PGDIR = 0,
123 HUGE_SHIFT_PMD = 1,
124 HUGE_SHIFT_PAGE = 2,
125 HUGE_SHIFT_ENTRIES
126};
127extern int huge_shift[HUGE_SHIFT_ENTRIES];
128#endif
129
Chris Metcalf867e3592010-05-28 23:09:12 -0400[diff] [blame]130#endif /* _ASM_TILE_HUGETLB_H */