Kontron COMe-cP2020 - Manual (Page 78)

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COMe-P2020 User Guide
78
6 U-Boot
6.1 Introduction to U-Boot
U-Boot is an open source bootloader software developed and maintained by DENX Software Engineering GmbH (http://
www.denx.de). Kontron provides U-Boot with all its standard features as well as Kontron-specific features for usage with
Kontron’s COMe-cP2020 module. This software is pre-installed at the facotory and is ready for use on powerup.
This user guide provides specific information on Kontron’s implementation of U-Boot and its usage. Please refer to the
DENX web site for up-to-date on-line documentation of all of U-Boot’s standard features.
6.2 Standard U-Boot Commands
U-Boot is provided with a set of standard commands for which documentation is available on the DENX web site. Some of
the standard commands have sub-groups which can be displayed when help for the main group command is requested.
Where relevant, further information concerning the usage of standard commands is provided in this guide to assist users in
performing specific functions.
The following table indicates the standard U-boot commands configured for the COMe-cP2020. The blue-shaded table cells
indicate standard U-Boot commands tested by Kontron. Only the standard U-Boot commands relevant for the normal oper-
ation of the COMe-cP2020 U-Boot bootloader have been tested by Kontron.
Table 6-1: Standard U-Boot Commands Configured for the COMe-cP2020
COMMAND DESCRIPTION
? Alias for 'help'
base Print or set address offset
bdinfo Print board Info structure
boot Boot default, i.e., run 'bootcmd'
bootd Boot default, i.e., run 'bootcmd'
bootelf Boot from an ELF image in memory
bootm Boot application image from memory
bootp Boot image via network using BOOTP/TFTP protocol
bootvx Boot vxWorks from an ELF image
chpart Change active partition
cmp Memory compare
coninfo Print console devices and information
cp Memory copy
cpu Multiprocessor CPU boot manipulation and release
crc32 Checksum calculation
dhcp Boot image via network using DHCP/TFTP protocol
echo Echo args to console
editenv Edit environment variable
env Environment handling commands