Kontron AM4100, User Manual

Page: 131 / 150

AM4100 NetBootLoader
ID 36126, Rev. 2.0 Page 5 - 43
P R E L I M I N A R Y
S WA P
FUNCTION: Modify or display the current NBL Flash memory device usage
SYNTAX:
swap [-t|-p]
where:
swap command
-t option: temporary
temporary NBL Flash swap
-p option: permanent
permanent NBL Flash swap
DESCRIPTION: The configuration of the NBL Flash memory devices (currently used
or redundant) is controlled by the IPMI controller, the payload
(HOST), and the switch SW2 (DIP switch position 2). The setting
combination of all three determines the current configuration.
The SWAP command is a toggle function meaning that when the
configuration is to be swapped, the SWAP command is invoked with
the “-t” option (temporary, at the next power on the configuration
reverts to the previous setting) or the “-p” option (permanently).
The current configuration can be determined by invoking the SWAP
command without either option.
If the board is not operated in a ATCA or µTCA environment (e.g. on
the AMEVAL1), startup problems may arise due to the simultaneous
startup of the payload (CPU) and the MMC. If the assignment is
configured as 'IPMI: reverse', the MMC switches the flashes during
payload startup which normally causes a crash.
This can be circumvented by holding the payload startup with a
debug probe for a few seconds or by delaying the startup of the MMC
(switch 'AMC ENABLE' on the AMEVAL1) and then switching back to
'IPMI: straight' once the system is running.