Intel E5-2600 RdPCIConfigLocal Response Definition Sheet 1, 0x05 0x02,0x03,0x05 0xe1 Definition

2.5.2.9.1Command 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 Section 2.5.5.2 for details regarding completion codes.

Figure 2-47. RdPCIConfigLocal()

Byte #	0	1	2	3
Byte	Client Address	Write Length	Read Length	Cmd Code
		0x05	{0x02,0x03,0x05}	0xe1
Definition

4

Host ID[7:1] &

Retry[0]

5	6	7	8
LSB	PCI Configuration Address	MSB	FCS

9

Completion

Code

10	11	12	13	14
LSB	Data (1, 2 or 4 bytes)		MSB	FCS

Note: The 3-byte PCI configuration address and read data field defined in Figure 2-47are sent in standard PECI ordering with LSB first and MSB last.

2.5.2.9.2Supported 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	Meaning
Bad FCS	Electrical error
Abort FCS	Illegal command formatting (mismatched RL/WL/Command Code)
CC: 0x40	Command passed, data is valid.

CC:0x80 Response timeout. The processor was not able to generate the required response in a timely fashion. Retry is appropriate.

CC:0x81 Response timeout. The processor is not able to allocate resources for servicing this command at this time. Retry is appropriate.

66	Intel® Xeon® Processor E5-1600/E5-2600/E5-4600 Product Families
	Datasheet Volume One