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PECI Interface
7.1.2.3.2
Supported Responses
The typical client response is a passing FCS and valid thermal data. Under some
conditions, the client's response will indicate a failure. GetTemp() response definitions
are listed in
Table 7-3.
GetTemp() Response Definition
Response
General Sensor Error (GSE)
Bad Write FCS
Abort FCS
0x0000
All other data
7.1.2.4
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
through this command.
7.1.2.4.1
Command Format
The RdPkgConfig() format is as follows:
Write 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
regarding completion codes.
Thermal/Mechanical Specifications and Design Guide
Table
7-3. Refer to
Thermal scan did not complete in time. Retry is appropriate.
Electrical error
Invalid command formatting (mismatched RL/WL/Command Code)
Processor is running at its maximum temperature or is currently being reset.
Valid temperature reading, reported as a negative offset from the processor
T
jmax .
Section 7.1.2.6
for more details on processor-specific services supported
Section 7.1.9.3
for more details on sensor errors.
Meaning
Section 7.1.7.2
for details
59
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