Kontron AM4022 uEFI BIOS - Manual (Page 75)

AM4022 uEFI BIOS Updating the uEFI BIOS
ID 1052-1333, Rev. 1.0 Page 69
7. Updating the uEFI BIOS
BIOS updates are typically delivered as an Update CD ISO image. This ISO image needs just
to be burned to a CD and booted. Follow the menu for updating the uEFI BIOS.
7.1 uEFI BIOS Fail-Over Mechanism
The AM4022 has two SPI boot flashes programmed with the uEFI BIOS, a standard SPI boot
flash and a recovery SPI boot flash. The basic idea behind that is to always have at least one
working uEFI BIOS flash available regardless if there have been any flashing errors or not.
7.2 Updating Procedure
An Update CD ISO image is provided for flashing the latest uEFI BIOS on the standard SPI
boot flash. The standard SPI boot flash can also be programmed with the latest uEFI BIOS via
the kflash -p uEFI Shell command.
Note: To have the same content in both SPI boot flashes, clone the standard SPI boot flash
to the recovery SPI boot flash. For further information, please refer to Chapter 6.2.7,
kflash uEFI Shell Command.
7.3 uEFI BIOS Recovery
In case of the standard SPI boot flash being corrupted and therefore the board not starting up,
the IPMI controller boots the board from the recovery SPI boot flash if the DIP switch SW3,
switch 2 is set to OFF.
For further information about the boot configuration, refer to the respective chapters in the
board’s user guide or contact Kontron for further assistance. Information about the boot config-
uration for the AM4022 is provided in the AM4022 User Guide, Chapter 4.1.
7.4 Determining the Active Flash
Sometimes it may be necessary to check which flash is active. On the AMI Aptio-based uEFI
BIOS, the information is available using the kboardinfo uEFI Shell command. For further in-
formation, refer to Chapter 6.2.3, kboardinfo uEFI Shell Command.