1 /*
2 * arch/arm64/include/asm/hugetlb.h
3 *
4 * Copyright (C) 2013 Linaro Ltd.
5 *
6 * Based on arch/x86/include/asm/hugetlb.h
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
18 #ifndef __ASM_HUGETLB_H
19 #define __ASM_HUGETLB_H
20
21 #include <asm/page.h>
22
huge_ptep_get(pte_t * ptep)23 static inline pte_t huge_ptep_get(pte_t *ptep)
24 {
25 return *ptep;
26 }
27
28
29
hugetlb_free_pgd_range(struct mmu_gather * tlb,unsigned long addr,unsigned long end,unsigned long floor,unsigned long ceiling)30 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
31 unsigned long addr, unsigned long end,
32 unsigned long floor,
33 unsigned long ceiling)
34 {
35 free_pgd_range(tlb, addr, end, floor, ceiling);
36 }
37
is_hugepage_only_range(struct mm_struct * mm,unsigned long addr,unsigned long len)38 static inline int is_hugepage_only_range(struct mm_struct *mm,
39 unsigned long addr, unsigned long len)
40 {
41 return 0;
42 }
43
prepare_hugepage_range(struct file * file,unsigned long addr,unsigned long len)44 static inline int prepare_hugepage_range(struct file *file,
45 unsigned long addr, unsigned long len)
46 {
47 struct hstate *h = hstate_file(file);
48 if (len & ~huge_page_mask(h))
49 return -EINVAL;
50 if (addr & ~huge_page_mask(h))
51 return -EINVAL;
52 return 0;
53 }
54
huge_pte_none(pte_t pte)55 static inline int huge_pte_none(pte_t pte)
56 {
57 return pte_none(pte);
58 }
59
huge_pte_wrprotect(pte_t pte)60 static inline pte_t huge_pte_wrprotect(pte_t pte)
61 {
62 return pte_wrprotect(pte);
63 }
64
arch_clear_hugepage_flags(struct page * page)65 static inline void arch_clear_hugepage_flags(struct page *page)
66 {
67 clear_bit(PG_dcache_clean, &page->flags);
68 }
69
70 extern pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
71 struct page *page, int writable);
72 #define arch_make_huge_pte arch_make_huge_pte
73 extern void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
74 pte_t *ptep, pte_t pte);
75 extern int huge_ptep_set_access_flags(struct vm_area_struct *vma,
76 unsigned long addr, pte_t *ptep,
77 pte_t pte, int dirty);
78 extern pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
79 unsigned long addr, pte_t *ptep);
80 extern void huge_ptep_set_wrprotect(struct mm_struct *mm,
81 unsigned long addr, pte_t *ptep);
82 extern void huge_ptep_clear_flush(struct vm_area_struct *vma,
83 unsigned long addr, pte_t *ptep);
84 extern void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
85 pte_t *ptep, unsigned long sz);
86 #define huge_pte_clear huge_pte_clear
87 extern void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr,
88 pte_t *ptep, pte_t pte, unsigned long sz);
89 #define set_huge_swap_pte_at set_huge_swap_pte_at
90
91 #include <asm-generic/hugetlb.h>
92
93 #ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
gigantic_page_supported(void)94 static inline bool gigantic_page_supported(void) { return true; }
95 #endif
96
97 #endif /* __ASM_HUGETLB_H */
98