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 23 static inline pte_t huge_ptep_get(pte_t *ptep) 24 { 25 return READ_ONCE(*ptep); 26 } 27 28 29 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 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 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 55 static inline int huge_pte_none(pte_t pte) 56 { 57 return pte_none(pte); 58 } 59 60 static inline pte_t huge_pte_wrprotect(pte_t pte) 61 { 62 return pte_wrprotect(pte); 63 } 64 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 94 static inline bool gigantic_page_supported(void) { return true; } 95 #endif 96 97 #endif /* __ASM_HUGETLB_H */ 98