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Intel® Xeon® Processor E5-1600/E5-2600/E5-4600 Product Families 35
Datasheet Volume One
Example bus transaction for a thermal sensor device located at address 0x30 returning
a value of negative 10 counts is show in Figure 2-9.
2.5.2.3.2 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 2-3. Refer to Section 2.5.7.4 for more details on sensor errors.
Notes:
1. This response will be reflected in Bytes 5 & 6 in Figure 2-9.
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:
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
Figure 2-9. GetTemp() Example
Byte #
Byte
Definition
0
0x30
1
0x01
2
0x02
4
0xef
5
0x80
6
0xfd
7
0x4b
3
0x01
Table 2-3. GetTemp() Response Definition
Response Meaning
General Sensor Error (GSE)
1
Thermal scan did not complete in time. Retry is appropriate.
Bad Write FCS Electrical error
Abort FCS Illegal command formatting (mismatched RL/WL/Command Code)
0x0000
1
Processor is running at its maximum temperature or is currently being reset.
All other data Valid temperature reading, reported as a negative offset from the processor
T
jmax
.