IntelÃ‚Â® Server System Server System "Emerald Ridge ... - CTL

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Intel® Server System "Emerald Ridge” Integrated Baseboard Management Controller EPSBIOS-BMC BMC Interactions8. BIOS-BMC BMC InteractionsBIOS-BMC interactions include the following:FRB2 Operation.POST Complete Signaling – BIOS asserts the POST Complete signal at the end of POST.BMC firmware monitors this signal.Retrieval of Platform Information – BIOS may query firmware revisions for the BMC andattached satellite controllers. BIOS may also read FRU device locator records from the BMC,to determine the system’s inventory. Additionally, BIOS must use subsystem information topopulate SMBIOS tables.System GUID Information – BIOS must send system GUID to the BMC on boot.SEL – The BIOS may add entries to the BMC’s system event log.Power Restore Policy – BIOS may operate on the BMC’s power restore policy to supportBIOS setup functionality.ACPI – BIOS must notify the BMC of ACPI state changes.Front Panel Lockout – BIOS may operate on the BMC’s front-panel lockout to support BIOSsetup functionality.Serial Port Sharing – BIOS must interact with the BMC to share the serial port for systemuse.Serial Console Redirection – BIOS redirects serial output to the BMC, for LAN-based serialredirection.BMC Self Test/Health – BIOS may query the BMC for self test results.Clock Synchronization – BIOS must synchronize the BMC’s clock with the system clockusing the Set SEL Time IPMI command.BIOS-monitored sensors – BIOS must notify the BMC of system faults such as DIMMfailures using OEM IPMI commands. The BMC uses this information to control theassociated fault LEDs.BIOS must read the thermal profile data records from the BMC to determine appropriatethermal settings.BIOS may clear the SEL, per BIOS setup options.BIOS must bridge host information to the ME, through the BMC.BMC may interact with BIOS if a Set System Boot Options command requires altering theboot order.BIOS may query the BMC for board SKU and revision ID values.During Memory Hot Plug/Memory Online operation BIOS needs to send new DIMMpopulation order to BMC, Memory Hot Plug and Memory Offline/Online section for detail.Revision 1.1Intel ® Confidential 81
Node Management (NM)Intel® Server System "Emerald Ridge” Integrated Baseboard Management Controller EPS9. Node Management (NM)9.1 OverviewNode Management (NM) provides the system with a method of monitoring power consumptionand thermal output, and adjusting system variables to control those factors. As opposed tocomponent-level power/thermal solutions (such as Demand Based Switching), NodeManagement functions at the platform level.NM is only available on platforms that support PMBus-compliant power supplies. The BMCsupports NM specification version 1.5. Additionally, the platform chipset must have an NMcapableManagement Engine (ME). Emerald Ridge has two IOH components but only IOH #1has an active embedded Management Engine (ME).9.2 Command BridgingThe majority of BMC functionality to support the NM is handled by bridging commands andalerts. The ME participating in Node Management acts as a satellite controller on the BMC’ssecondary IPMB. The BMC does not own any platform event filters or traps for NM-relatedevents. These events should be configured in the NM by server management software.9.2.1 External Communications LinkThe BMC bridges commands between external software agents and the system’s ME usingstandard IPMI Send Message commands. If the user establishes a session using out of band,the minimum privilege level to bridge ME commands is Administrator. See the commandbridging section in the Intelligent Platform Management Interface Specification SecondGeneration v2.0 for more information.All NM-related IPMB transactions utilize the secondary IPMB. This is a private I 2 C bus 4 that isonly accessible by the BMC and ME.9.2.2 AlertingThe ME’s Node Manager may need to send alerts to external software agents. The NM usestwo different methods to send an alert. Each method is outlined below.9.2.2.1 Fault EventsAlerts that signify fault conditions and should be recorded in the system SEL will be sent to theBMC by the ME using the IPMI Platform Event Message command. The BMC deposits theseevents into the SEL. The external SW must configure the BMC’s PEF and alerting features tosend that event out as an IPMI LAN alert, directed to the SW application over the LAN link.9.2.2.2 Informational EventsAlerts that provide useful notification to the external SW for NPTM management but do notrepresent significant fault conditions and do not need to be entered in the SEL will be sent to theBMC using the IPMI Alert Immediate command. This requires that the external SW applicationprovide the NM on the ME with the alert destination and alert string information needed toproperly form and send the alert. The external SW must first properly configure the alert82Intel ConfidentialRevision 1.1
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IntelÃ‚Â® Server System Server System "Emerald Ridge ... - CTL

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