hw/arm/smmu-internal.h

   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