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 #include <asm-generic/hugetlb.h>
20
21
is_hugepage_only_range(struct mm_struct * mm,unsigned long addr,unsigned long len)22 static inline int is_hugepage_only_range(struct mm_struct *mm,
23 unsigned long addr,
24 unsigned long len) {
25 return 0;
26 }
27
28 /*
29 * If the arch doesn't supply something else, assume that hugepage
30 * size aligned regions are ok without further preparation.
31 */
prepare_hugepage_range(struct file * file,unsigned long addr,unsigned long len)32 static inline int prepare_hugepage_range(struct file *file,
33 unsigned long addr, unsigned long len)
34 {
35 struct hstate *h = hstate_file(file);
36 if (len & ~huge_page_mask(h))
37 return -EINVAL;
38 if (addr & ~huge_page_mask(h))
39 return -EINVAL;
40 return 0;
41 }
42
hugetlb_prefault_arch_hook(struct mm_struct * mm)43 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
44 {
45 }
46
hugetlb_free_pgd_range(struct mmu_gather * tlb,unsigned long addr,unsigned long end,unsigned long floor,unsigned long ceiling)47 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
48 unsigned long addr, unsigned long end,
49 unsigned long floor,
50 unsigned long ceiling)
51 {
52 free_pgd_range(tlb, addr, end, floor, ceiling);
53 }
54
set_huge_pte_at(struct mm_struct * mm,unsigned long addr,pte_t * ptep,pte_t pte)55 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
56 pte_t *ptep, pte_t pte)
57 {
58 set_pte(ptep, pte);
59 }
60
huge_ptep_get_and_clear(struct mm_struct * mm,unsigned long addr,pte_t * ptep)61 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
62 unsigned long addr, pte_t *ptep)
63 {
64 return ptep_get_and_clear(mm, addr, ptep);
65 }
66
huge_ptep_clear_flush(struct vm_area_struct * vma,unsigned long addr,pte_t * ptep)67 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
68 unsigned long addr, pte_t *ptep)
69 {
70 ptep_clear_flush(vma, addr, ptep);
71 }
72
huge_pte_none(pte_t pte)73 static inline int huge_pte_none(pte_t pte)
74 {
75 return pte_none(pte);
76 }
77
huge_pte_wrprotect(pte_t pte)78 static inline pte_t huge_pte_wrprotect(pte_t pte)
79 {
80 return pte_wrprotect(pte);
81 }
82
huge_ptep_set_wrprotect(struct mm_struct * mm,unsigned long addr,pte_t * ptep)83 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
84 unsigned long addr, pte_t *ptep)
85 {
86 ptep_set_wrprotect(mm, addr, ptep);
87 }
88
huge_ptep_set_access_flags(struct vm_area_struct * vma,unsigned long addr,pte_t * ptep,pte_t pte,int dirty)89 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
90 unsigned long addr, pte_t *ptep,
91 pte_t pte, int dirty)
92 {
93 return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
94 }
95
huge_ptep_get(pte_t * ptep)96 static inline pte_t huge_ptep_get(pte_t *ptep)
97 {
98 return *ptep;
99 }
100
arch_prepare_hugepage(struct page * page)101 static inline int arch_prepare_hugepage(struct page *page)
102 {
103 return 0;
104 }
105
arch_release_hugepage(struct page * page)106 static inline void arch_release_hugepage(struct page *page)
107 {
108 }
109
arch_clear_hugepage_flags(struct page * page)110 static inline void arch_clear_hugepage_flags(struct page *page)
111 {
112 }
113
114 #ifdef CONFIG_HUGETLB_SUPER_PAGES
arch_make_huge_pte(pte_t entry,struct vm_area_struct * vma,struct page * page,int writable)115 static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
116 struct page *page, int writable)
117 {
118 size_t pagesize = huge_page_size(hstate_vma(vma));
119 if (pagesize != PUD_SIZE && pagesize != PMD_SIZE)
120 entry = pte_mksuper(entry);
121 return entry;
122 }
123 #define arch_make_huge_pte arch_make_huge_pte
124
125 /* Sizes to scale up page size for PTEs with HV_PTE_SUPER bit. */
126 enum {
127 HUGE_SHIFT_PGDIR = 0,
128 HUGE_SHIFT_PMD = 1,
129 HUGE_SHIFT_PAGE = 2,
130 HUGE_SHIFT_ENTRIES
131 };
132 extern int huge_shift[HUGE_SHIFT_ENTRIES];
133 #endif
134
135 #endif /* _ASM_TILE_HUGETLB_H */
136