Rdpciconfiglocal() Response Definition - Intel Xeon Processor E5-1600 Datasheet

2.5.2.9.1 Command Format
The RdPCIConfigLocal() format is as follows:
Write Length: 0x05
Read Length: 0x02 (byte), 0x03 (word), 0x05 (dword)
Command: 0xe1
Description: Returns the data maintained in the PCI configuration space within the
processor at the requested PCI configuration address. The Read Length dictates the
desired data return size. This command supports byte, word and dword responses as
well as a completion code. All command responses are prepended with a completion
code that includes additional pass/fail status information. Refer to
details regarding completion codes.
Figure 2-47. RdPCIConfigLocal()
0
Byte #
Client Address
Byte
Definition
Host ID[7:1] &
9
Completion
LSB
Code
Note: The 3-byte PCI configuration address and read data field defined in
LSB first and MSB last.
2.5.2.9.2 Supported Responses
The typical client response is a passing FCS, a passing Completion Code and valid data.
Under some conditions, the client's response will indicate a failure.
The PECI client response can also vary depending on the address and data. It will
respond with a passing completion code if it successfully submits the request to the
appropriate location and gets a response.
Table 2-13. RdPCIConfigLocal() Response Definition (Sheet 1 of 2)
Response
Bad FCS
Abort FCS
CC: 0x40
CC: 0x80
CC: 0x81
66
1
Write Length
0x05 {0x02,0x03,0x05}
4 5
LSB
Retry[0]
10 11
Data (1, 2 or 4 bytes)
Electrical error
Illegal command formatting (mismatched RL/WL/Command Code)
Command passed, data is valid.
Response timeout. The processor was not able to generate the required response in a
timely fashion. Retry is appropriate.
Response timeout. The processor is not able to allocate resources for servicing this
command at this time. Retry is appropriate.
Intel® Xeon® Processor E5-1600/E5-2600/E5-4600 Product Families
2 3
Read Length Cmd Code
0xe1
6
PCI Configuration Address
12
Figure 2-47 are sent in standard PECI ordering with
Meaning
Section 2.5.5.2 for
7 8
MSB FCS
13 14
MSB FCS
Datasheet Volume One