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 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 22 #ifndef __ASM_HUGETLB_H 23 #define __ASM_HUGETLB_H 24 25 #include <asm-generic/hugetlb.h> 26 #include <asm/page.h> 27 28 static inline pte_t huge_ptep_get(pte_t *ptep) 29 { 30 return *ptep; 31 } 32 33 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, 34 pte_t *ptep, pte_t pte) 35 { 36 set_pte_at(mm, addr, ptep, pte); 37 } 38 39 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, 40 unsigned long addr, pte_t *ptep) 41 { 42 ptep_clear_flush(vma, addr, ptep); 43 } 44 45 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, 46 unsigned long addr, pte_t *ptep) 47 { 48 ptep_set_wrprotect(mm, addr, ptep); 49 } 50 51 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, 52 unsigned long addr, pte_t *ptep) 53 { 54 return ptep_get_and_clear(mm, addr, ptep); 55 } 56 57 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, 58 unsigned long addr, pte_t *ptep, 59 pte_t pte, int dirty) 60 { 61 return ptep_set_access_flags(vma, addr, ptep, pte, dirty); 62 } 63 64 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, 65 unsigned long addr, unsigned long end, 66 unsigned long floor, 67 unsigned long ceiling) 68 { 69 free_pgd_range(tlb, addr, end, floor, ceiling); 70 } 71 72 static inline int is_hugepage_only_range(struct mm_struct *mm, 73 unsigned long addr, unsigned long len) 74 { 75 return 0; 76 } 77 78 static inline int prepare_hugepage_range(struct file *file, 79 unsigned long addr, unsigned long len) 80 { 81 struct hstate *h = hstate_file(file); 82 if (len & ~huge_page_mask(h)) 83 return -EINVAL; 84 if (addr & ~huge_page_mask(h)) 85 return -EINVAL; 86 return 0; 87 } 88 89 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm) 90 { 91 } 92 93 static inline int huge_pte_none(pte_t pte) 94 { 95 return pte_none(pte); 96 } 97 98 static inline pte_t huge_pte_wrprotect(pte_t pte) 99 { 100 return pte_wrprotect(pte); 101 } 102 103 static inline int arch_prepare_hugepage(struct page *page) 104 { 105 return 0; 106 } 107 108 static inline void arch_release_hugepage(struct page *page) 109 { 110 } 111 112 static inline void arch_clear_hugepage_flags(struct page *page) 113 { 114 clear_bit(PG_dcache_clean, &page->flags); 115 } 116 117 #endif /* __ASM_HUGETLB_H */ 118