1 .. SPDX-License-Identifier: GPL-2.0+
12 <command> <interface> [devnum][.hwpartnum][:partnum|#partname]
17 Many U-Boot commands allow specifying partitions (or whole disks) using a
21 The interface used to access the partition's device, like ``mmc`` or
22 ``scsi``. For a full list of supported interfaces, consult the
23 ``if_typename_str`` array in ``drivers/block/blk-uclass.c``
26 The device number. This defaults to 0.
29 The hardware partition number. All devices have at least one hardware
30 partition. On most devices, hardware partition 0 specifies the whole
31 device. On eMMC devices, hardware partition 0 is the user partition,
32 hardware partitions 1 and 2 are the boot partitions, hardware partition
33 3 is the RPMB partition, and further partitions are general-purpose
34 user-created partitions. The default hardware partition number is 0.
37 The partition number, starting from 1. The partition number 0 specifies
38 that the whole device is to be used as one "partition."
41 The partition name. This is the partition label for GPT partitions. For
42 MBR partitions, the following syntax is used::
44 <devtype><devletter><partnum>
47 A device type like ``mmcsd`` or ``hd``. See the
48 ``part_set_generic_name`` function in ``disk/part.c`` for a
52 The device number as an offset from ``a``. For example, device
53 number 2 would have a device letter of ``c``.
56 The partition number. This is the same as above.
58 If neither ``partname`` nor ``partnum`` is specified and there is a partition
59 table, then partition 1 is used. If there is no partition table, then the whole
60 device is used as one "partition." If none of ``devnum``, ``hwpartnum``,
61 ``partnum``, or ``partname`` is specified, or only ``-`` is specified, then
62 ``devnum`` defaults to the value of the ``bootdevice`` environmental variable.
67 List the root directory contents on MMC device 2, hardware partition 1,
68 and partition number 3::
72 Load ``/kernel.itb`` to address ``0x80000000`` from SCSI device 0, hardware partition
73 0, and the partition labeled ``boot``::
75 load scsi #boot 0x80000000 /kernel.itb
77 Print the partition UUID of the SATA device ``$bootdevice``, hardware partition
78 0, and partition number 0::