NEC Intel Xeon E5-2430 N8101-572F User Manual

74

Intel® Xeon® Processor E5-1600/E5-2600/E5-4600 Product Families

Datasheet Volume One

The PECI host originator should be designed to support all optional but desirable 
features from all processors of interest. Each feature has a discovery method and 

response code that indicates availability on the destination PECI client.

The first step in the enumeration process would be for the PECI host to confirm the 

Revision Number through the use of the GetDIB() command. The revision number 

returned by the PECI client processor always maps to the revision number of the PECI 
specification that it is designed to. The Minor Revision Number as described in 

 

may be used to identify the subset of PECI commands that the processor in question 

supports for any major PECI revision.

The next step in the enumeration process is to utilize the desired command suite in a 

real execution context. If the Write FCS response is an Abort FCS or if the data 

returned includes an “Unknown/Invalid/Illegal Request” completion code (0x90), then 
the command is unsupported. 

Enumerating known commands without real, execution context data, or attempting 

undefined commands, is dangerous because a write command could result in 
unexpected behavior if the data is not properly formatted. Methods for enumerating 

write commands using carefully constructed and innocuous data are possible, but are 

not guaranteed by the PECI client definition.

This enumeration procedure is not robust enough to detect differences in bit definitions 

or data interpretation in the message payload or client response. Instead, it is only 

designed to enumerate discrete features.

The processor does not support multiple domains, but it is possible that future products 

will, and the following tables are included as a reference for domain-specific definitions.

0b10

1

GetTemp()

0x02

RdPkgConfig()

0xa2

WrPkgConfig()

0xa6

RdIAMSR()

0xb2

RdPCIConfig()

0x62

RdPCIConfigLocal()

0xe2

WrPCIConfigLocal()

0xe6