1.. SPDX-License-Identifier: GPL-2.0+ 2.. Copyright 2020, Heinrich Schuchardt <xypron.glpk@gmx.de> 3 4efi command 5=========== 6 7Synopsis 8-------- 9 10:: 11 12 efi mem [all] 13 efi tables 14 15Description 16----------- 17 18The *efi* command provides information about the EFI environment U-Boot is 19running in, when it is started from EFI. 20 21When running as an EFI app, this command queries EFI boot services for the 22information. When running as an EFI payload, EFI boot services have been 23stopped, so it uses the information collected by the boot stub before that 24happened. 25 26efi mem 27~~~~~~~ 28 29This shows the EFI memory map, sorted in order of physical address. 30 31This is normally a very large table. To help reduce the amount of detritus, 32boot-time memory is normally merged with conventional memory. Use the 'all' 33argument to show everything. 34 35The fields are as follows: 36 37# 38 Entry number (sequentially from 0) 39 40Type 41 Memory type. EFI has a large number of memory types. The type is shown in 42 the format <n>:<name> where in is the format number in hex and <name> is the 43 name. 44 45Physical 46 Physical address 47 48Virtual 49 Virtual address 50 51Size 52 Size of memory area in bytes 53 54Attributes 55 Shows a code for memory attributes. The key for this is shown below the 56 table. 57 58efi tables 59~~~~~~~~~~ 60 61This shows a list of the EFI tables provided in the system table. These use 62GUIDs so it is not possible in general to show the name of a table. But some 63effort is made to provide a useful table, where the GUID is known by U-Boot. 64 65 66Example 67------- 68 69:: 70 71 => efi mem 72 EFI table at 0, memory map 000000001ad38b60, size 1260, key a79, version 1, descr. size 0x30 73 # Type Physical Virtual Size Attributes 74 0 7:conv 0000000000 0000000000 00000a0000 f 75 <gap> 00000a0000 0000060000 76 1 7:conv 0000100000 0000000000 0000700000 f 77 2 a:acpi_nvs 0000800000 0000000000 0000008000 f 78 3 7:conv 0000808000 0000000000 0000008000 f 79 4 a:acpi_nvs 0000810000 0000000000 00000f0000 f 80 5 7:conv 0000900000 0000000000 001efef000 f 81 6 6:rt_data 001f8ef000 0000000000 0000100000 rf 82 7 5:rt_code 001f9ef000 0000000000 0000100000 rf 83 8 0:reserved 001faef000 0000000000 0000080000 f 84 9 9:acpi_reclaim 001fb6f000 0000000000 0000010000 f 85 10 a:acpi_nvs 001fb7f000 0000000000 0000080000 f 86 11 7:conv 001fbff000 0000000000 0000359000 f 87 12 6:rt_data 001ff58000 0000000000 0000020000 rf 88 13 a:acpi_nvs 001ff78000 0000000000 0000088000 f 89 <gap> 0020000000 0090000000 90 14 0:reserved 00b0000000 0000000000 0010000000 1 91 92 Attributes key: 93 f: uncached, write-coalescing, write-through, write-back 94 rf: uncached, write-coalescing, write-through, write-back, needs runtime mapping 95 1: uncached 96 *Some areas are merged (use 'all' to see) 97 98 99 => efi mem all 100 EFI table at 0, memory map 000000001ad38bb0, size 1260, key a79, version 1, descr. size 0x30 101 # Type Physical Virtual Size Attributes 102 0 3:bs_code 0000000000 0000000000 0000001000 f 103 1 7:conv 0000001000 0000000000 000009f000 f 104 <gap> 00000a0000 0000060000 105 2 7:conv 0000100000 0000000000 0000700000 f 106 3 a:acpi_nvs 0000800000 0000000000 0000008000 f 107 4 7:conv 0000808000 0000000000 0000008000 f 108 5 a:acpi_nvs 0000810000 0000000000 00000f0000 f 109 6 4:bs_data 0000900000 0000000000 0000c00000 f 110 7 7:conv 0001500000 0000000000 000aa36000 f 111 8 2:loader_data 000bf36000 0000000000 0010000000 f 112 9 4:bs_data 001bf36000 0000000000 0000020000 f 113 10 7:conv 001bf56000 0000000000 00021e1000 f 114 11 1:loader_code 001e137000 0000000000 00000c4000 f 115 12 7:conv 001e1fb000 0000000000 000009b000 f 116 13 1:loader_code 001e296000 0000000000 00000e2000 f 117 14 7:conv 001e378000 0000000000 000005b000 f 118 15 4:bs_data 001e3d3000 0000000000 000001e000 f 119 16 7:conv 001e3f1000 0000000000 0000016000 f 120 17 4:bs_data 001e407000 0000000000 0000016000 f 121 18 2:loader_data 001e41d000 0000000000 0000002000 f 122 19 4:bs_data 001e41f000 0000000000 0000828000 f 123 20 3:bs_code 001ec47000 0000000000 0000045000 f 124 21 4:bs_data 001ec8c000 0000000000 0000001000 f 125 22 3:bs_code 001ec8d000 0000000000 000000e000 f 126 23 4:bs_data 001ec9b000 0000000000 0000001000 f 127 24 3:bs_code 001ec9c000 0000000000 000002c000 f 128 25 4:bs_data 001ecc8000 0000000000 0000001000 f 129 26 3:bs_code 001ecc9000 0000000000 000000c000 f 130 27 4:bs_data 001ecd5000 0000000000 0000006000 f 131 28 3:bs_code 001ecdb000 0000000000 0000014000 f 132 29 4:bs_data 001ecef000 0000000000 0000001000 f 133 30 3:bs_code 001ecf0000 0000000000 000005b000 f 134 31 4:bs_data 001ed4b000 0000000000 000000b000 f 135 32 3:bs_code 001ed56000 0000000000 0000024000 f 136 33 4:bs_data 001ed7a000 0000000000 0000006000 f 137 34 3:bs_code 001ed80000 0000000000 0000010000 f 138 35 4:bs_data 001ed90000 0000000000 0000002000 f 139 36 3:bs_code 001ed92000 0000000000 0000025000 f 140 37 4:bs_data 001edb7000 0000000000 0000003000 f 141 38 3:bs_code 001edba000 0000000000 0000011000 f 142 39 4:bs_data 001edcb000 0000000000 0000008000 f 143 40 3:bs_code 001edd3000 0000000000 000002d000 f 144 41 4:bs_data 001ee00000 0000000000 0000201000 f 145 42 3:bs_code 001f001000 0000000000 0000024000 f 146 43 4:bs_data 001f025000 0000000000 0000002000 f 147 44 3:bs_code 001f027000 0000000000 0000009000 f 148 45 4:bs_data 001f030000 0000000000 0000005000 f 149 46 3:bs_code 001f035000 0000000000 000002f000 f 150 47 4:bs_data 001f064000 0000000000 0000001000 f 151 48 3:bs_code 001f065000 0000000000 0000005000 f 152 49 4:bs_data 001f06a000 0000000000 0000005000 f 153 50 3:bs_code 001f06f000 0000000000 0000007000 f 154 51 4:bs_data 001f076000 0000000000 0000007000 f 155 52 3:bs_code 001f07d000 0000000000 000000d000 f 156 53 4:bs_data 001f08a000 0000000000 0000001000 f 157 54 3:bs_code 001f08b000 0000000000 0000006000 f 158 55 4:bs_data 001f091000 0000000000 0000004000 f 159 56 3:bs_code 001f095000 0000000000 000000d000 f 160 57 4:bs_data 001f0a2000 0000000000 0000003000 f 161 58 3:bs_code 001f0a5000 0000000000 0000026000 f 162 59 4:bs_data 001f0cb000 0000000000 0000005000 f 163 60 3:bs_code 001f0d0000 0000000000 0000019000 f 164 61 4:bs_data 001f0e9000 0000000000 0000004000 f 165 62 3:bs_code 001f0ed000 0000000000 0000024000 f 166 63 4:bs_data 001f111000 0000000000 0000008000 f 167 64 3:bs_code 001f119000 0000000000 000000b000 f 168 65 4:bs_data 001f124000 0000000000 0000001000 f 169 66 3:bs_code 001f125000 0000000000 0000002000 f 170 67 4:bs_data 001f127000 0000000000 0000002000 f 171 68 3:bs_code 001f129000 0000000000 0000009000 f 172 69 4:bs_data 001f132000 0000000000 0000003000 f 173 70 3:bs_code 001f135000 0000000000 0000005000 f 174 71 4:bs_data 001f13a000 0000000000 0000003000 f 175 72 3:bs_code 001f13d000 0000000000 0000005000 f 176 73 4:bs_data 001f142000 0000000000 0000003000 f 177 74 3:bs_code 001f145000 0000000000 0000011000 f 178 75 4:bs_data 001f156000 0000000000 000000b000 f 179 76 3:bs_code 001f161000 0000000000 0000009000 f 180 77 4:bs_data 001f16a000 0000000000 0000400000 f 181 78 3:bs_code 001f56a000 0000000000 0000006000 f 182 79 4:bs_data 001f570000 0000000000 0000001000 f 183 80 3:bs_code 001f571000 0000000000 0000001000 f 184 81 4:bs_data 001f572000 0000000000 0000002000 f 185 82 3:bs_code 001f574000 0000000000 0000017000 f 186 83 4:bs_data 001f58b000 0000000000 0000364000 f 187 84 6:rt_data 001f8ef000 0000000000 0000100000 rf 188 85 5:rt_code 001f9ef000 0000000000 0000100000 rf 189 86 0:reserved 001faef000 0000000000 0000080000 f 190 87 9:acpi_reclaim 001fb6f000 0000000000 0000010000 f 191 88 a:acpi_nvs 001fb7f000 0000000000 0000080000 f 192 89 4:bs_data 001fbff000 0000000000 0000201000 f 193 90 7:conv 001fe00000 0000000000 00000e8000 f 194 91 4:bs_data 001fee8000 0000000000 0000020000 f 195 92 3:bs_code 001ff08000 0000000000 0000026000 f 196 93 4:bs_data 001ff2e000 0000000000 0000009000 f 197 94 3:bs_code 001ff37000 0000000000 0000021000 f 198 95 6:rt_data 001ff58000 0000000000 0000020000 rf 199 96 a:acpi_nvs 001ff78000 0000000000 0000088000 f 200 <gap> 0020000000 0090000000 201 97 0:reserved 00b0000000 0000000000 0010000000 1 202 203 Attributes key: 204 f: uncached, write-coalescing, write-through, write-back 205 rf: uncached, write-coalescing, write-through, write-back, needs runtime mapping 206 1: uncached 207 208 209 => efi tables 210 000000001f8edf98 ee4e5898-3914-4259-9d6e-dc7bd79403cf EFI_LZMA_COMPRESSED 211 000000001ff2ace0 05ad34ba-6f02-4214-952e-4da0398e2bb9 EFI_DXE_SERVICES 212 000000001f8ea018 7739f24c-93d7-11d4-9a3a-0090273fc14d EFI_HOB_LIST 213 000000001ff2bac0 4c19049f-4137-4dd3-9c10-8b97a83ffdfa EFI_MEMORY_TYPE 214 000000001ff2cb10 49152e77-1ada-4764-b7a2-7afefed95e8b (unknown) 215 000000001f9ac018 060cc026-4c0d-4dda-8f41-595fef00a502 EFI_MEM_STATUS_CODE_REC 216 000000001f9ab000 eb9d2d31-2d88-11d3-9a16-0090273fc14d SMBIOS table 217 000000001fb7e000 eb9d2d30-2d88-11d3-9a16-0090273fc14d EFI_GUID_EFI_ACPI1 218 000000001fb7e014 8868e871-e4f1-11d3-bc22-0080c73c8881 ACPI table 219 000000001e654018 dcfa911d-26eb-469f-a220-38b7dc461220 (unknown) 220