Kontron AM4140 U-Boot Bootloader Uživatelský manuál stáhnout pdf (Strana 11)

AM4140 U-Boot Bootloader U-Boot Usage

ID 1052-0281, Rev. 1.0 Page 11

P R E L I M I N A R Y

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 fea-

tures as well as Kontron-specific features for usage with Kontron’s AM4140 AMC module.

This user guide provides specific information on Kontron’s implementation of U-Boot and its us-

age. Please refer to the DENX web site for up-to-date on-line documentation of all of U-Boot’s

standard features.

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 con-

cerning 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 AM4140. The

blue-shaded table cells indicate standard U-Boot commands tested by Kontron. Only the stan-

dard U-Boot commands relevant for the normal operation of the AM4140 U-Boot bootloader

have been tested by Kontron.

Table 1: Standard U- Boot Commands Configured for the AM4140

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

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 45 46

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Kontron AM4140 U-Boot Bootloader Uživatelský manuál Strana 11