Kontron AM5020 uEFI BIOS - Manual (Page 66)

Updating the uEFI BIOS AM5020 uEFI BIOS
Page 60 ID 1045-0247, Rev. 1.0
P R E L I M I N A R Y
7.5 Manual Flash Selection
Usually the active flash is selected by the MMC controller. The manual selection of the redun-
dant flash bank can be done either via the Set Control State IPMI OEM command or using
the DIP Switch SW4, switch 2. The Set Control State IPMI OEM command can be issued
without having payload power applied.
The flash bank can be switched via one of the following IPMI OEM commands:
To select the first flash bank, use the following Set Control State command:
To select the second flash bank, use the following Set Control State command:
To determine the currently selected flash bank, use the following Get Control State com-
mand:
For further information regarding the Set Control State Commands and the Get Con-
trol State
Command, refer to the IPMI manual, Chapter 3, OEM Commands and Command
Extensions.
7.6 Flash Selection by DIP Switch
In some cases it may be necessary to force the board to boot from the other flash bank without
using the management software. In this case, the onboard DIP switch SW4, switch 2, is used
to toggle the active flash bank. Please note that this switch does not “select” a flash bank. It
only toggles the currently selected flash bank.
impitool raw 0x3E 0x20 0x00 0x00
impitool raw 0x3E 0x20 0x00 0x01
impitool raw 0x3E 0x21 0x00