1 /* 2 * ARM SMMU support - Internal API 3 * 4 * Copyright (c) 2017 Red Hat, Inc. 5 * Copyright (C) 2014-2016 Broadcom Corporation 6 * Written by Prem Mallappa, Eric Auger 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 * General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License along 18 * with this program; if not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 #ifndef HW_ARM_SMMU_INTERNAL_H 22 #define HW_ARM_SMMU_INTERNAL_H 23 24 #define TBI0(tbi) ((tbi) & 0x1) 25 #define TBI1(tbi) ((tbi) & 0x2 >> 1) 26 27 /* PTE Manipulation */ 28 29 #define ARM_LPAE_PTE_TYPE_SHIFT 0 30 #define ARM_LPAE_PTE_TYPE_MASK 0x3 31 32 #define ARM_LPAE_PTE_TYPE_BLOCK 1 33 #define ARM_LPAE_PTE_TYPE_TABLE 3 34 35 #define ARM_LPAE_L3_PTE_TYPE_RESERVED 1 36 #define ARM_LPAE_L3_PTE_TYPE_PAGE 3 37 38 #define ARM_LPAE_PTE_VALID (1 << 0) 39 40 #define PTE_ADDRESS(pte, shift) \ 41 (extract64(pte, shift, 47 - shift + 1) << shift) 42 43 #define is_invalid_pte(pte) (!(pte & ARM_LPAE_PTE_VALID)) 44 45 #define is_reserved_pte(pte, level) \ 46 ((level == 3) && \ 47 ((pte & ARM_LPAE_PTE_TYPE_MASK) == ARM_LPAE_L3_PTE_TYPE_RESERVED)) 48 49 #define is_block_pte(pte, level) \ 50 ((level < 3) && \ 51 ((pte & ARM_LPAE_PTE_TYPE_MASK) == ARM_LPAE_PTE_TYPE_BLOCK)) 52 53 #define is_table_pte(pte, level) \ 54 ((level < 3) && \ 55 ((pte & ARM_LPAE_PTE_TYPE_MASK) == ARM_LPAE_PTE_TYPE_TABLE)) 56 57 #define is_page_pte(pte, level) \ 58 ((level == 3) && \ 59 ((pte & ARM_LPAE_PTE_TYPE_MASK) == ARM_LPAE_L3_PTE_TYPE_PAGE)) 60 61 /* access permissions */ 62 63 #define PTE_AP(pte) \ 64 (extract64(pte, 6, 2)) 65 66 #define PTE_APTABLE(pte) \ 67 (extract64(pte, 61, 2)) 68 69 /* 70 * TODO: At the moment all transactions are considered as privileged (EL1) 71 * as IOMMU translation callback does not pass user/priv attributes. 72 */ 73 #define is_permission_fault(ap, perm) \ 74 (((perm) & IOMMU_WO) && ((ap) & 0x2)) 75 76 #define PTE_AP_TO_PERM(ap) \ 77 (IOMMU_ACCESS_FLAG(true, !((ap) & 0x2))) 78 79 /* Level Indexing */ 80 81 static inline int level_shift(int level, int granule_sz) 82 { 83 return granule_sz + (3 - level) * (granule_sz - 3); 84 } 85 86 static inline uint64_t level_page_mask(int level, int granule_sz) 87 { 88 return ~(MAKE_64BIT_MASK(0, level_shift(level, granule_sz))); 89 } 90 91 static inline 92 uint64_t iova_level_offset(uint64_t iova, int inputsize, 93 int level, int gsz) 94 { 95 return ((iova & MAKE_64BIT_MASK(0, inputsize)) >> level_shift(level, gsz)) & 96 MAKE_64BIT_MASK(0, gsz - 3); 97 } 98 99 #endif 100