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 #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION 24 #define arch_hugetlb_migration_supported arch_hugetlb_migration_supported 25 extern bool arch_hugetlb_migration_supported(struct hstate *h); 26 #endif 27 28 #define __HAVE_ARCH_HUGE_PTEP_GET 29 static inline pte_t huge_ptep_get(pte_t *ptep) 30 { 31 return READ_ONCE(*ptep); 32 } 33 34 static inline int is_hugepage_only_range(struct mm_struct *mm, 35 unsigned long addr, unsigned long len) 36 { 37 return 0; 38 } 39 40 static inline void arch_clear_hugepage_flags(struct page *page) 41 { 42 clear_bit(PG_dcache_clean, &page->flags); 43 } 44 45 extern pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, 46 struct page *page, int writable); 47 #define arch_make_huge_pte arch_make_huge_pte 48 #define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT 49 extern void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, 50 pte_t *ptep, pte_t pte); 51 #define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS 52 extern int huge_ptep_set_access_flags(struct vm_area_struct *vma, 53 unsigned long addr, pte_t *ptep, 54 pte_t pte, int dirty); 55 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR 56 extern pte_t huge_ptep_get_and_clear(struct mm_struct *mm, 57 unsigned long addr, pte_t *ptep); 58 #define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT 59 extern void huge_ptep_set_wrprotect(struct mm_struct *mm, 60 unsigned long addr, pte_t *ptep); 61 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH 62 extern void huge_ptep_clear_flush(struct vm_area_struct *vma, 63 unsigned long addr, pte_t *ptep); 64 #define __HAVE_ARCH_HUGE_PTE_CLEAR 65 extern void huge_pte_clear(struct mm_struct *mm, unsigned long addr, 66 pte_t *ptep, unsigned long sz); 67 extern void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr, 68 pte_t *ptep, pte_t pte, unsigned long sz); 69 #define set_huge_swap_pte_at set_huge_swap_pte_at 70 71 #include <asm-generic/hugetlb.h> 72 73 #endif /* __ASM_HUGETLB_H */ 74