Kontron AM4120 IPMI Firmware - Manual (Page 9)

AM4120 IPMI Firmware Functional Description
ID 1045-9586, Rev. 1.0 Page 3
An external 64 kB serial EEPROM chip is used for firmware private data and for FRU inventory
storage. Furthermore, an external 4 MB serial SPI flash is used for additional firmware image
storage.
The MMC implements one local Keyboard Controller Style (KCS) interface with interrupt sup-
port for communication with the system side management software and the U-Boot bootloader.
The IPMB-L bus is used for interconnection with the IPMC.
The MMC provides access to various sensors which permit the monitoring of:
• System power voltages: +12V (PWR), +5V, +3.3V, +3.3V (MP)
• Temperatures: board and airflow near AMC edge-connector
• Power Good, LAN links, board reset, IPMB-L state, Health error, IPMI watchdog, Firm-
ware update/rollback, etc.
2. MMC Firmware
2.1 Key Features
The following are key features of the AM4120 MMC firmware:
• Compliant with the related IPMI and PICMG® specifications
• Firmware designed and specially made for AdvancedMC environments (ATCA, µTCA)
• Supports one KCS interface with interrupt support
• Supports the local IPMB (IPMB-L) interface
• Out-of-Band management and monitoring using IPMB-L interface permits access to
sensors regardless of the module’s CPU state
• Sensor thresholds fully configurable
• Sensor names prefixed with AMC module Bay ID (A1…4, B1…4)
• Usable in µTCA slots 1…12. Sensor names for slots 9…12 are prefixed with C1…C4
• Complete IPMI watchdog functionality
• Complete FRU functionality
• Firmware can be updated in the field
• Firmware image management may be done by the open tool “ipmitool” (functions “hpm”
or “fwum”)
• Downloading new firmware image does not break currently running firmware activities
• Manual and automatic firmware image roll-back in case of upgrade failure
• Interoperable with other AMC, ATCA, or IPMI solutions
• U-Boot fail-over control for automatic U-Boot firmware bank switching after having
detected a non-working U-Boot
• OEM commands for U-Boot firmware bank selection
• Graceful shutdown support
• The “Health” LED shows MMC's heartbeat and pulses on KCS interface traffic