1 /* 2 * arch/arm/include/asm/hugetlb.h 3 * 4 * Copyright (C) 2012 ARM 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_ARM_HUGETLB_H 23 #define _ASM_ARM_HUGETLB_H 24 25 #include <asm/page.h> 26 #include <asm-generic/hugetlb.h> 27 28 #include <asm/hugetlb-3level.h> 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 39 static inline int is_hugepage_only_range(struct mm_struct *mm, 40 unsigned long addr, unsigned long len) 41 { 42 return 0; 43 } 44 45 static inline int prepare_hugepage_range(struct file *file, 46 unsigned long addr, unsigned long len) 47 { 48 struct hstate *h = hstate_file(file); 49 if (len & ~huge_page_mask(h)) 50 return -EINVAL; 51 if (addr & ~huge_page_mask(h)) 52 return -EINVAL; 53 return 0; 54 } 55 56 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm) 57 { 58 } 59 60 static inline int huge_pte_none(pte_t pte) 61 { 62 return pte_none(pte); 63 } 64 65 static inline pte_t huge_pte_wrprotect(pte_t pte) 66 { 67 return pte_wrprotect(pte); 68 } 69 70 static inline int arch_prepare_hugepage(struct page *page) 71 { 72 return 0; 73 } 74 75 static inline void arch_release_hugepage(struct page *page) 76 { 77 } 78 79 static inline void arch_clear_hugepage_flags(struct page *page) 80 { 81 clear_bit(PG_dcache_clean, &page->flags); 82 } 83 84 #endif /* _ASM_ARM_HUGETLB_H */ 85