Intel E5-1600 manual Client Responses, Abort FCS, Completion Codes, Completion Code Pass/Fail Mask

2.5.5Client Responses

2.5.5.1Abort FCS

The Client responds with an Abort FCS under the following conditions:

•The decoded command is not understood or not supported on this processor (this includes good command codes with bad Read Length or Write Length bytes).

•Assured Write FCS (AW FCS) failure. Under most circumstances, an Assured Write failure will appear as a bad FCS. However, when an originator issues a poorly formatted command with a miscalculated AW FCS, the client will intentionally abort the FCS in order to guarantee originator notification.

2.5.5.2Completion Codes

Some PECI commands respond with a completion code byte. These codes are designed to communicate the pass/fail status of the command and may also provide more detailed information regarding the class of pass or fail. For all commands listed in Section 2.5.2 that support completion codes, the definition in the following table applies. Throughout this document, a completion code reference may be abbreviated with ‘CC’.

An originator that is decoding these commands can apply a simple mask as shown in Table 2-21to determine a pass or fail. Bit 7 is always set on a command that did not complete successfully and is cleared on a passing command.

Table 2-21. Completion Code Pass/Fail Mask

0xxx xxxxb	Command passed
1xxx xxxxb	Command failed

Table 2-22. Device Specific Completion Code (CC) Definition

Completion	Description
Code
0x40	Command Passed
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 was not able to allocate resources for servicing this
	command. Retry is appropriate.
CC: 0x82	The processor hardware resources required to service this command are in a low power
	state. Retry may be appropriate after modification of PECI wake mode behavior if
	appropriate.
CC: 0x83-8F	Reserved
CC: 0x90	Unknown/Invalid/Illegal Request
CC: 0x91	PECI control hardware, firmware or associated logic error. The processor is unable to process
	the request.
CC: 0x92-9F	Reserved

Note: The codes explicitly defined in Table 2-22may be useful in PECI originator response algorithms. Reserved or undefined codes may also be generated by a PECI client device, and the originating agent must be capable of tolerating any code. The Pass/Fail mask defined in Table 2-21applies to all codes, and general response policies may be based on this information. Refer to Section 2.5.6 for originator response policies and recommendations.

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