pITX-iMX8M – User Guide Rev. 1.4
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7.4.
Kontron Bootloader Command Extensions
Kontron’s implementation of U-Boot includes some enhancements to provide board specific functions. They are not
part of standard U-Boot as maintained by DENX. The following table provides a complete listing of all Kontron
command extensions on the PITX-iMX8M.
Table 45: Bootloader Command Extensions
Command
Description
kboardinfo
Kontron Board Information - Displays a summary of board and
configuration information
7.4.1.
kboardinfo - Kontron Board Information
The "kboardinfo" command shows a summary of board serialization data gathered from the system EEPROM.
Figure 35: Kboardinfo
=> => kboardinfo
Manufacturer: Kontron Europe GmbH
Product name: pITX-iMX8M
Material number: 44011-0408-13-4
Serial number: UTD080002
MAC0 (ethaddr): 00:e0:4b:6f:dc:cd
MAC1 (eth1addr): na
Manufacturer Date: 06/03/2020
Revision: B00
CPU: i.MX8MQ rev2.1 1300 MHz (running at 800 MHz)
CPU: Industrial temperature grade (-40C to 105C) at 65C
Reset cause: POR
7.5.
Bootloader Environment
The bootloader environment is used to control bootloader and OS startup behavior. Environment variables can be
used to control boot timing (e.g. bootdelay), interface properties (e.g. baudrate, ethact) or they define memory
locations where OS images are stored before boot (e.g. loadaddr, fdt_addr). In addition, bootloader shell commands
can be combined to environment scripts.
The redundant bootloader environment is permanently stored on SDcard at offset 0x400000. During bootloader
operation, the environment is held in RAM memory and can be modified and written back to persistent storage.
Bootloader commands to modify the environment are summed up under the "env" command group:
env default [-f] –a
[forcibly] reset default environment
env default [-f] var [...]
[forcibly] reset variable(s) to their default values
env delete [-f] var [...]
[forcibly] delete variable(s)
env edit name
edit environment variable
env exists name
tests for existence of variable
env print [-a | name ...]
print environment
env run var [...]
run commands in an environment variable
env save
save environment
env set [-f] name [arg ...]
However, the legacy commands for environment handling are still available:
"setenv",
Summary of Contents for Kontron pITX-iMX8M
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