Kontron COMe-bP5020 - Manual (Page 47)

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User Guide
COMe-bP5020
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 Kon-
tron’s COMe-bP5020 module. This sof tware is pre-installed at the factory and is ready for use on power-up.
This chapter 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 rel-
evant, 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-bP5020. The blue-shaded table cells in-
dicate standard U-Boot commands tested by Kontron. Only the standard U-Boot commands relevant for the normal operation
of the COMe-bP5020 U-Boot bootloader have been tested by Kontron.
Table 41: Standard U- Boot Commands Configured for the COMe-bP5020
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
errata Report errata workarounds
exit Exit script
ext2load Load binary f ile from an Ext2 f ilesystem
ext2ls List files in a directory (default /)
false Do nothing, unsuccessfully
fatinfo Print information about f ilesystem
fatload Load binary f ile from a dos filesystem
fatls List files in a directory (default /)
fdt Flattened device tree utility commands
fsinfo Print information about f ilesystems
fsload Load binary f ile from a f ilesystem image
go Start application at address 'addr'
grepenv Search environment variables