| Catalin Marinas | 1355e2a | 2012-07-25 14:32:38 +0100 | [diff] [blame] | 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 */ |