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

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Intel® Server System "Emerald Ridge” Integrated BaseboardManagement Controller EPSAppendix A: OEM SDR RecordsThermal Profile Data SDR RecordThis record sub-type provides a customizable storage location for data describing thesystem’s thermal profile. The BIOS uses this information to configure system components aspart of the overall acoustics and thermals management scheme. These SDRs can becustomized per platform and per memory throttling mode. On platforms that support multipleprofiles, each Thermal Profile SDR can apply to one or more profiles for a given memorythrottling mode.Table 87. Thermal Profile Data SDR Record FormatByteNameDescription0:2 OEM ID Intel manufacturers ID – 157h, little endian3 Record Subtype Value 0BhThermal Profile Data Record4 Flags [7:2] – Reserved[1:0] – Memory throttling mode that this record is valid for0 = None supported1 = Open-loop thermal throttling (OLTT) - Not supported on EmeraldRidge2 = Close-loop thermal throttling (CLTT)3 = reserved5 Profile Support Bitmap This is a bitmask that indicates which fan control profiles that this recordis valid for. 0 means no profile is defined.[7][6][5][4][3][2][1][0]1 = Valid for profile 71 = Valid for profile 61 = Valid for profile 51 = Valid for profile 41 = Valid for profile 31 = Valid for profile 21 = Valid for profile 11 = Valid for profile 0Only Profiles 0-4 are supported on Emerald Ridge.6:N Thermal Profile Data Byte format defined by thermals team and / or the BIOS. May beformalized later. If the number of bytes in this field changes, the“Record Length” field and “_REC_LEN” tag above the SDR data mustbe adjusted to match.The maximum supported value of N is 63, for a maximum SDR bodysize of 64 bytes, with 58 bytes of thermal profile data. This constraint isimposed by the Intelligent Platform Management Interface SpecificationSecond Generation v2.0. A maximum-sized SDR can be retrieved overthe KCS-SMS interface, but it may be truncated over other interfaces.Please refer BIOS EPS for details on Thermal Profile Data bytes.Revision 1.0Intel ® Confidential 165
Appendix A: OEM SDR RecordsIntel® Server System "Emerald Ridge” Integrated BaseboardManagement Controller EPSFan Speed Control RecordThis record provides the following information to control the fans based on temperature:Control values to be used for normal, boost and sleep states for each fan control domain.Minimum fan control value to be applied to each fan domain.A mapping of the SDR to applicable fan profiles for a platform.Ramp-step and scan-rate at which a new contribution is added to the fan control domain.Temperature sensor owner, sensor number, and algorithm that contributes to the fandomain.A table that maps from raw sensor temperature readings to fan control PWM value inpercentages for stepwise linear type temperature sensor.PWM value in percentages and scan rate for a clamp-type temperature sensor.Table 89 shows the standard FSC SDR main record. An entire OEM SDR is limited to 64bytes, including a 5-byte header not shown here. This limits how many sub-records will fitinto one SDR.Table 88. Fan Sensor Scaling SDR FormatByteNameDescription0:2 OEM ID Intel manufacturer’s ID – 157h, little endian.3 Record Subtype Value 0Ch.Temperature Fan Control Record4 Record Version Version # of this specific SDR record subtype. Set to 01h for the formatdescribed in this document.5 Fan Control Domain Fan control domain number defined in the platform spec.6 Normal Control Value If no temperature sub-records present:The PWM value (% value – 0-100) to use when fans are commanded tobe at nominal speed.If only clamp type temperature sub-records present:The PWM value (% value – 0-100) base for contributions from theclamp type sub-records.In all cases:7 Boost Control Value If value is 0-100:Minimum PWM value (% value – 0-100) that the BMC must guaranteewill be in effect for the domain at all times.PWM value (%) to use when a fan has failed or a critical temperaturehas been detected.If value = 0xFF:Use Boost values from sub-record8 Ramp Step Max step up / down ramp (in %) when applying contribution.9 Scan Rate Number of scan cycles before applying the next ramp step.166Intel ConfidentialRevision 1.1
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IntelÃ‚Â® Server System Server System "Emerald Ridge ... - CTL

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