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"Das U-Boot" Source Tree
1.. SPDX-License-Identifier: GPL-2.0+:
2
3.. index::
4 single: part (command)
5
6part command
7============
8
9Synopsis
10--------
11
12::
13
14 part uuid <interface> <dev>:<part> [varname]
15 part list <interface> <dev> [flags] [varname]
16 part start <interface> <dev> <part> <varname>
17 part size <interface> <dev> <part> <varname>
18 part number <interface> <dev> <part> <varname>
19 part set <interface> <dev> <part> <type>
20 part type <interface> <dev>:<part> [varname]
21 part types
22
23Description
24-----------
25
26The `part` command is used to manage disk partition related commands.
27
28The 'part uuid' command prints or sets an environment variable to partition UUID
29
30 interface
31 interface for accessing the block device (mmc, sata, scsi, usb, ....)
32 dev
33 device number
34 part
35 partition number
36 varname
37 an optional environment variable to store the current partition UUID value into.
38
39The 'part list' command prints or sets an environment variable to the list of partitions
40
41 interface
42 interface for accessing the block device (mmc, sata, scsi, usb, ....)
43 dev
44 device number
45 part
46 partition number
47 flags
48 -bootable
49 lists only bootable partitions
50 varname
51 an optional environment variable to store the list of partitions value into.
52
53The 'part start' commnad sets an environment variable to the start of the partition (in blocks),
54part can be either partition number or partition name.
55
56 interface
57 interface for accessing the block device (mmc, sata, scsi, usb, ....)
58 dev
59 device number
60 part
61 partition number
62 varname
63 a variable to store the current start of the partition value into.
64
65The 'part size' command sets an environment variable to the size of the partition (in blocks),
66part can be either partition number or partition name.
67
68 interface
69 interface for accessing the block device (mmc, sata, scsi, usb, ....)
70 dev
71 device number
72 part
73 partition number
74 varname
75 a variable to store the current size of the partition value into.
76
77The 'part number' command sets an environment variable to the partition number using the partition name,
78part must be specified as partition name.
79
80 interface
81 interface for accessing the block device (mmc, sata, scsi, usb, ....)
82 dev
83 device number
84 part
85 partition number
86 varname
87 a variable to store the current partition number value into
88
89The 'part set' command sets the type of a partition. This is useful when
90autodetection fails or does not do the correct thing:
91
92 interface
93 interface for accessing the block device (mmc, sata, scsi, usb, ....)
94 dev
95 device number
96 part
97 partition number
98 type
99 partition type to use (see 'part types') to check available types
100
101The 'part type' command prints or sets an environment variable to the partition type UUID.
102
103 interface
104 interface for accessing the block device (mmc, sata, scsi, usb, ....)
105 dev
106 device number
107 part
108 partition number
109 varname
110 a variable to store the current partition type UUID value into
111
112The 'part types' command list supported partition table types.
113
114Examples
115--------
116
117::
118
119 => host bind 0 ./test_gpt_disk_image.bin
120 => part uuid host 0:1
121 24156b69-3378-497f-bb3e-b982223de528
122 => part uuid host 0:1 varname
123 => env print varname
124 varname=24156b69-3378-497f-bb3e-b982223de528
125 =>
126 => part list host 0
127
128 Partition Map for HOST device 0 -- Partition Type: EFI
129
130 Part Start LBA End LBA Name
131 Attributes
132 Type GUID
133 Partition GUID
134 1 0x00000800 0x00000fff "second"
135 attrs: 0x0000000000000000
136 type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
137 (data)
138 guid: 24156b69-3378-497f-bb3e-b982223de528
139 2 0x00001000 0x00001bff "first"
140 attrs: 0x0000000000000000
141 type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
142 (data)
143 guid: 5272ee44-29ab-4d46-af6c-4b45ac67d3b7
144 =>
145 => part start host 0 2 varname
146 => env print varname
147 varname=1000
148 =>
149 => part size host 0 2 varname
150 => env print varname
151 varname=c00
152 =>
153 => part number host 0 2 varname
154 => env print varname
155 varname=0x2
156 =>
157 => part type host 0:1
158 ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
159 => part type host 0:1 varname
160 => env print varname
161 varname=ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
162 =>
163 => part types
164 Supported partition tables: EFI, AMIGA, DOS, ISO, MAC
165
166This shows looking at a device with multiple partition tables::
167
168 => virtio scan
169 => part list virtio 0
170
171 Partition Map for VirtIO device 0 -- Partition Type: EFI
172
173 Part Start LBA End LBA Name
174 Attributes
175 Type GUID
176 Partition GUID
177 1 0x00000040 0x0092b093 "ISO9660"
178 attrs: 0x1000000000000001
179 type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
180 guid: a0891d7e-b930-4513-94d8-f629dbd637b2
181 2 0x0092b094 0x0092d7e7 "Appended2"
182 attrs: 0x0000000000000000
183 type: c12a7328-f81f-11d2-ba4b-00a0c93ec93b
184 guid: a0891d7e-b930-4513-94db-f629dbd637b2
185 3 0x0092d7e8 0x0092da3f "Gap1"
186 attrs: 0x1000000000000001
187 type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
188 guid: a0891d7e-b930-4513-94da-f629dbd637b2
189 => ls virtio 0:3
190 => part types
191 Supported partition tables: EFI, DOS, ISO
192 => part set virtio 0 dos
193
194 Partition Map for VirtIO device 0 -- Partition Type: DOS
195
196 Part Start Sector Num Sectors UUID Type
197 1 1 9624191 00000000-01 ee
198 => part set virtio 0 iso
199
200 Partition Map for VirtIO device 0 -- Partition Type: ISO
201
202 Part Start Sect x Size Type
203 1 3020 4 512 U-Boot
204 2 9613460 10068 512 U-Boot
205 => part set virtio 0 efi
206
207 Partition Map for VirtIO device 0 -- Partition Type: EFI
208
209 Part Start LBA End LBA Name
210 Attributes
211 Type GUID
212 Partition GUID
213 1 0x00000040 0x0092b093 "ISO9660"
214 attrs: 0x1000000000000001
215 type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
216 guid: a0891d7e-b930-4513-94d8-f629dbd637b2
217 2 0x0092b094 0x0092d7e7 "Appended2"
218 attrs: 0x0000000000000000
219 type: c12a7328-f81f-11d2-ba4b-00a0c93ec93b
220 guid: a0891d7e-b930-4513-94db-f629dbd637b2
221 3 0x0092d7e8 0x0092da3f "Gap1"
222 attrs: 0x1000000000000001
223 type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
224 guid: a0891d7e-b930-4513-94da-f629dbd637b2
225 =>
226
227Return value
228------------
229
230The return value $? is set to 0 (true) if the command succededd. If an
231error occurs, the return value $? is set to 1 (false).