1 /* 2 * Copyright (c) 2017-2020, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 /* 8 * This header file contains internal definitions that are not supposed to be 9 * used outside of this library code. 10 */ 11 12 #ifndef XLAT_TABLES_V2_HELPERS_H 13 #define XLAT_TABLES_V2_HELPERS_H 14 15 #ifndef XLAT_TABLES_V2_H 16 #error "Do not include this header file directly. Include xlat_tables_v2.h instead." 17 #endif 18 19 #ifndef __ASSEMBLER__ 20 21 #include <stdbool.h> 22 #include <stddef.h> 23 24 #include <platform_def.h> 25 26 #include <lib/cassert.h> 27 #include <lib/xlat_tables/xlat_tables_arch.h> 28 #include <lib/xlat_tables/xlat_tables_defs.h> 29 30 /* Forward declaration */ 31 struct mmap_region; 32 33 /* 34 * Helper macro to define an mmap_region_t. This macro allows to specify all 35 * the fields of the structure but its parameter list is not guaranteed to 36 * remain stable as we add members to mmap_region_t. 37 */ 38 #define MAP_REGION_FULL_SPEC(_pa, _va, _sz, _attr, _gr) \ 39 { \ 40 .base_pa = (_pa), \ 41 .base_va = (_va), \ 42 .size = (_sz), \ 43 .attr = (_attr), \ 44 .granularity = (_gr), \ 45 } 46 47 /* Struct that holds all information about the translation tables. */ 48 struct xlat_ctx { 49 /* 50 * Max allowed Virtual and Physical Addresses. 51 */ 52 unsigned long long pa_max_address; 53 uintptr_t va_max_address; 54 55 /* 56 * Array of all memory regions stored in order of ascending end address 57 * and ascending size to simplify the code that allows overlapping 58 * regions. The list is terminated by the first entry with size == 0. 59 * The max size of the list is stored in `mmap_num`. `mmap` points to an 60 * array of mmap_num + 1 elements, so that there is space for the final 61 * null entry. 62 */ 63 struct mmap_region *mmap; 64 int mmap_num; 65 66 /* 67 * Array of finer-grain translation tables. 68 * For example, if the initial lookup level is 1 then this array would 69 * contain both level-2 and level-3 entries. 70 */ 71 uint64_t (*tables)[XLAT_TABLE_ENTRIES]; 72 int tables_num; 73 #if PLAT_RO_XLAT_TABLES 74 bool readonly_tables; 75 #endif 76 /* 77 * Keep track of how many regions are mapped in each table. The base 78 * table can't be unmapped so it isn't needed to keep track of it. 79 */ 80 #if PLAT_XLAT_TABLES_DYNAMIC 81 int *tables_mapped_regions; 82 #endif /* PLAT_XLAT_TABLES_DYNAMIC */ 83 84 int next_table; 85 86 /* 87 * Base translation table. It doesn't need to have the same amount of 88 * entries as the ones used for other levels. 89 */ 90 uint64_t *base_table; 91 unsigned int base_table_entries; 92 93 /* 94 * Max Physical and Virtual addresses currently in use by the 95 * translation tables. These might get updated as we map/unmap memory 96 * regions but they will never go beyond pa/va_max_address. 97 */ 98 unsigned long long max_pa; 99 uintptr_t max_va; 100 101 /* Level of the base translation table. */ 102 unsigned int base_level; 103 104 /* Set to true when the translation tables are initialized. */ 105 bool initialized; 106 107 /* 108 * Translation regime managed by this xlat_ctx_t. It should be one of 109 * the EL*_REGIME defines. 110 */ 111 int xlat_regime; 112 }; 113 114 #if PLAT_XLAT_TABLES_DYNAMIC 115 #define XLAT_ALLOC_DYNMAP_STRUCT(_ctx_name, _xlat_tables_count) \ 116 static int _ctx_name##_mapped_regions[_xlat_tables_count]; 117 118 #define XLAT_REGISTER_DYNMAP_STRUCT(_ctx_name) \ 119 .tables_mapped_regions = _ctx_name##_mapped_regions, 120 #else 121 #define XLAT_ALLOC_DYNMAP_STRUCT(_ctx_name, _xlat_tables_count) \ 122 /* do nothing */ 123 124 #define XLAT_REGISTER_DYNMAP_STRUCT(_ctx_name) \ 125 /* do nothing */ 126 #endif /* PLAT_XLAT_TABLES_DYNAMIC */ 127 128 #if PLAT_RO_XLAT_TABLES 129 #define XLAT_CTX_INIT_TABLE_ATTR() \ 130 .readonly_tables = false, 131 #else 132 #define XLAT_CTX_INIT_TABLE_ATTR() 133 /* do nothing */ 134 #endif 135 136 #define REGISTER_XLAT_CONTEXT_FULL_SPEC(_ctx_name, _mmap_count, \ 137 _xlat_tables_count, _virt_addr_space_size, \ 138 _phy_addr_space_size, _xlat_regime, \ 139 _table_section, _base_table_section) \ 140 CASSERT(CHECK_PHY_ADDR_SPACE_SIZE(_phy_addr_space_size), \ 141 assert_invalid_physical_addr_space_sizefor_##_ctx_name);\ 142 \ 143 static mmap_region_t _ctx_name##_mmap[_mmap_count + 1]; \ 144 \ 145 static uint64_t _ctx_name##_xlat_tables[_xlat_tables_count] \ 146 [XLAT_TABLE_ENTRIES] \ 147 __aligned(XLAT_TABLE_SIZE) __section(_table_section); \ 148 \ 149 static uint64_t _ctx_name##_base_xlat_table \ 150 [GET_NUM_BASE_LEVEL_ENTRIES(_virt_addr_space_size)] \ 151 __aligned(GET_NUM_BASE_LEVEL_ENTRIES(_virt_addr_space_size)\ 152 * sizeof(uint64_t)) \ 153 __section(_base_table_section); \ 154 \ 155 XLAT_ALLOC_DYNMAP_STRUCT(_ctx_name, _xlat_tables_count) \ 156 \ 157 static xlat_ctx_t _ctx_name##_xlat_ctx = { \ 158 .pa_max_address = (_phy_addr_space_size) - 1ULL, \ 159 .va_max_address = (_virt_addr_space_size) - 1UL, \ 160 .mmap = _ctx_name##_mmap, \ 161 .mmap_num = (_mmap_count), \ 162 .tables = _ctx_name##_xlat_tables, \ 163 .tables_num = _xlat_tables_count, \ 164 XLAT_CTX_INIT_TABLE_ATTR() \ 165 XLAT_REGISTER_DYNMAP_STRUCT(_ctx_name) \ 166 .next_table = 0, \ 167 .base_table = _ctx_name##_base_xlat_table, \ 168 .base_table_entries = \ 169 GET_NUM_BASE_LEVEL_ENTRIES(_virt_addr_space_size),\ 170 .max_pa = 0U, \ 171 .max_va = 0U, \ 172 .base_level = GET_XLAT_TABLE_LEVEL_BASE(_virt_addr_space_size),\ 173 .initialized = false, \ 174 .xlat_regime = (_xlat_regime) \ 175 } 176 177 #endif /*__ASSEMBLER__*/ 178 179 #endif /* XLAT_TABLES_V2_HELPERS_H */ 180