Intel® Server System Server System "Emerald Ridge ... - CTL

Node Management (NM)Intel® Server System "Emerald Ridge” Integrated Baseboard Management Controller EPSOn Intel server platforms, the ME FW uses a single operational image with a recovery image. Inorder to upgrade an operational image a boot-to-recovery image must be performed. Therecovery image only provides the basic functionality that is required to perform the update;therefore other SPS features are not functional when the update is in progress.9.3.3 Management Engine InteractionThe ME is located on a private IPMB, at address 2Ch. See Table 6 for a list of I 2 C buses.9.3.3.1 POST InitializationDuring early POST, the BMC collects PECI data from the CPU (including I CC_TDC ). At the sametime, system BIOS gathers information about installed CPUs, including MSR readings,maximum power, minimum power, total P-states, and total T-states. Then BIOS must issue aSet Node Manager Platform Info IPMI command to the BMC. The BMC will take the information,add the additional CPU data, and issue a Set Host CPU Data IPMI command to the ME.Other ME-BMC interactions are listed below:BMC stores sensor data records for ME-owned sensorsBMC participates in ME firmware updateBMC initializes ME-owned sensors based on SDRsBMC receives platform event messages sent by the MEBMC notifies ME of POST completionBMC may be queried by the ME for inlet temperature readings84Intel ConfidentialRevision 1.1