1 /* 2 * arch/arm/include/asm/hugetlb-3level.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_3LEVEL_H 23 #define _ASM_ARM_HUGETLB_3LEVEL_H 24 25 26 /* 27 * If our huge pte is non-zero then mark the valid bit. 28 * This allows pte_present(huge_ptep_get(ptep)) to return true for non-zero 29 * ptes. 30 * (The valid bit is automatically cleared by set_pte_at for PROT_NONE ptes). 31 */ 32 static inline pte_t huge_ptep_get(pte_t *ptep) 33 { 34 pte_t retval = *ptep; 35 if (pte_val(retval)) 36 pte_val(retval) |= L_PTE_VALID; 37 return retval; 38 } 39 40 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, 41 pte_t *ptep, pte_t pte) 42 { 43 set_pte_at(mm, addr, ptep, pte); 44 } 45 46 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, 47 unsigned long addr, pte_t *ptep) 48 { 49 ptep_clear_flush(vma, addr, ptep); 50 } 51 52 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, 53 unsigned long addr, pte_t *ptep) 54 { 55 ptep_set_wrprotect(mm, addr, ptep); 56 } 57 58 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, 59 unsigned long addr, pte_t *ptep) 60 { 61 return ptep_get_and_clear(mm, addr, ptep); 62 } 63 64 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, 65 unsigned long addr, pte_t *ptep, 66 pte_t pte, int dirty) 67 { 68 return ptep_set_access_flags(vma, addr, ptep, pte, dirty); 69 } 70 71 #endif /* _ASM_ARM_HUGETLB_3LEVEL_H */ 72