Specification Sheet

Intel

Xeon

Processor E5-1600/E5-2600/E5-4600 v2 Product Families 37

Datasheet Volume One of Two

Interfaces

2.5.2.4 RdPkgConfig()

The RdPkgConfig() command provides read access to the package configuration space

(PCS) within the processor, including various power and thermal management

functions. Typical PCS read services supported by the processor may include access to

temperature data, energy status, run time information, DIMM temperatures and so on.

Refer to Section 2.5.2.6 for more details on processor-specific services supported

through this command.

2.5.2.4.1 Command Format

The RdPkgConfig() format is as follows:

te Length: 0x05

Read Length: 0x05 (dword)

Command: 0xa1

Description: Returns the data maintained in the processor package configuration

space for the PCS entry as specified by the ‘index’ and ‘parameter’ fields. The ‘index’

field contains the encoding for the requested service and is used in conjunction with the

‘parameter’ field to specify the exact data being requested. The Read Length dictates

the desired data return size. This command supports only dword responses on the

processor PECI clients. All command responses are prepended with a completion code

that contains additional pass/fail status information. Refer to Section 2.5.5.2 for details

regarding completion codes.

Note: The 2-byte parameter field and 4-byte read data field defined in Figure 2-10 are sent in standard PECI ordering with LSB

first and MSB last.

Figure 2-10. RdPkgConfig()