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_free_pgd_range(struct mmu_gather * tlb,unsigned long addr,unsigned long end,unsigned long floor,unsigned long ceiling)43 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
44 unsigned long addr, unsigned long end,
45 unsigned long floor,
46 unsigned long ceiling)
47 {
48 free_pgd_range(tlb, addr, end, floor, ceiling);
49 }
50
set_huge_pte_at(struct mm_struct * mm,unsigned long addr,pte_t * ptep,pte_t pte)51 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
52 pte_t *ptep, pte_t pte)
53 {
54 set_pte(ptep, pte);
55 }
56
huge_ptep_get_and_clear(struct mm_struct * mm,unsigned long addr,pte_t * ptep)57 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
58 unsigned long addr, pte_t *ptep)
59 {
60 return ptep_get_and_clear(mm, addr, ptep);
61 }
62
huge_ptep_clear_flush(struct vm_area_struct * vma,unsigned long addr,pte_t * ptep)63 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
64 unsigned long addr, pte_t *ptep)
65 {
66 ptep_clear_flush(vma, addr, ptep);
67 }
68
huge_pte_none(pte_t pte)69 static inline int huge_pte_none(pte_t pte)
70 {
71 return pte_none(pte);
72 }
73
huge_pte_wrprotect(pte_t pte)74 static inline pte_t huge_pte_wrprotect(pte_t pte)
75 {
76 return pte_wrprotect(pte);
77 }
78
huge_ptep_set_wrprotect(struct mm_struct * mm,unsigned long addr,pte_t * ptep)79 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
80 unsigned long addr, pte_t *ptep)
81 {
82 ptep_set_wrprotect(mm, addr, ptep);
83 }
84
huge_ptep_set_access_flags(struct vm_area_struct * vma,unsigned long addr,pte_t * ptep,pte_t pte,int dirty)85 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
86 unsigned long addr, pte_t *ptep,
87 pte_t pte, int dirty)
88 {
89 return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
90 }
91
huge_ptep_get(pte_t * ptep)92 static inline pte_t huge_ptep_get(pte_t *ptep)
93 {
94 return *ptep;
95 }
96
arch_clear_hugepage_flags(struct page * page)97 static inline void arch_clear_hugepage_flags(struct page *page)
98 {
99 }
100
101 #ifdef CONFIG_HUGETLB_SUPER_PAGES
arch_make_huge_pte(pte_t entry,struct vm_area_struct * vma,struct page * page,int writable)102 static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
103 struct page *page, int writable)
104 {
105 size_t pagesize = huge_page_size(hstate_vma(vma));
106 if (pagesize != PUD_SIZE && pagesize != PMD_SIZE)
107 entry = pte_mksuper(entry);
108 return entry;
109 }
110 #define arch_make_huge_pte arch_make_huge_pte
111
112 /* Sizes to scale up page size for PTEs with HV_PTE_SUPER bit. */
113 enum {
114 HUGE_SHIFT_PGDIR = 0,
115 HUGE_SHIFT_PMD = 1,
116 HUGE_SHIFT_PAGE = 2,
117 HUGE_SHIFT_ENTRIES
118 };
119 extern int huge_shift[HUGE_SHIFT_ENTRIES];
120 #endif
121
122 #endif /* _ASM_TILE_HUGETLB_H */
123