Artesyn ATCA-8310 Installation and Use (May 2014) - Manual (Page 225)

Intelligent Peripheral Management Controller
ATCA-8310 Installation and Use (6806800M72E) 225
7.10 U-Boot Boot Configuration Parameters
The IPMC allows storing u-boot environment variables which complement those saved in the
P4080's non-volatile storage. When u-boot starts, it first copies its environment parameter set
from it's NVRAM into memory. Then it reads parameters from the IPMC, adding new
parameters to the parameter set in memory, deleting or modifying existing ones. During
runtime, only the memory copy of the parameter set is used.
The parameters stored in the IPMC are not automatically saved back to u-boot's NVRAM. The
IPMI command being used to manage the boot configuration variables is called "Set/Get
System Boot Options" together with parameter #100.
Storing u-boot environment variables in IPMC non-volatile memory has the advantage, that
those can be set by the ShMM or across HPI applications as well. The system manager may
decide from which boot device the blade shall boot from.