Artesyn ATCA-7480, Инструкция по установке и эксплуатации, Страница: 285 / 330

IPMI Feature Set
ATCA-7480 Installation and Use (6806800T17A)
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The boot loader maintains redundant copies of the firmware in flash. Each time the IPMI
firmware is upgraded, a redundant copy of the current IPMI firmware is made in flash. Once the
new IPMI firmware is programmed, the IPMI controller will reset itself to boot from the new
image. Also, the boot loader validates new IPMI firmware images. The provided IPMI controller
can power up successfully and the actual image is made active and the previously active image
is made backup. In case power-up fails, the boot loader will automatically recover from crisis
and boots from the image.
The IPMI controller can be upgraded via KCS, LAN, or IPMB interface. To ensure that the payload
is not interrupted during IPMI firmware upgrade, the IPMI controller stores all operational
information (e-keying, hot-swap state, last events to be queued, graceful shutdown timeout,
latest pin settings and so on) in non-volatile storage.
9.2.1.2 IAP Component
The BMR-A2F-AMCc IPMI building block from Pigeon Point is implemented within an FPGA
logic block from Microsemi Inc. Its fabric can be upgraded via HPM.1 firmware upgrade. This
process is referred to In Application Programming (IAP) upgrade.
As there is no possibility of crisis recovery, Artesyn does not recommend to upgrade this
component without any need.
9.2.1.3 FPGA Component
The Lattice Glue Logic FPGA is equipped with two SPI flashes; one is called "Active", the other
one is "Backup".
During power-up, the IPMC protects the "Active" SPI flash by de-selecting it, once the FPGA
boots successfully. Thus, HPM.1 specific logic updates can be performed only to the "Backup"
SPI flash. By explicitly prohibiting FPGA logic updates to the "Active" SPI flash, crisis recovery is
guaranteed always. Both FPGA flashes cannot be overwritten wrongly even by accidently.
The information about which FPGA flash is active, is provided using the Boot Bank Supervision
Sensor. For more details, see
Boot Bank Supervision Sensor on page 304 .
Besides HPM.1 manual rollback, there is also a possibility to switch the banks without
upgrading an HPM.1 firmware at all. For details see
System Boot Options Commands on page
233 .