Data Sheet

Datasheet, Volume 1 of 2 33
Interfaces
2.3.2 DMI Error Flow
DMI can only generate SERR in response to errors; never SCI, SMI, MSI, PCI INT, or
GPE. Any DMI related SERR activity is associated with Device 0.
2.3.3 DMI Link Down
The DMI link going down is a fatal, unrecoverable error. If the DMI data link goes to
data link down, after the link was up, then the DMI link hangs the system by not
allowing the link to retrain to prevent data corruption. This link behavior is controlled by
the PCH.
Downstream transactions that had been successfully transmitted across the link prior
to the link going down may be processed as normal. No completions from downstream,
non-posted transactions are returned upstream over the DMI link after a link down
event.
Figure 2-4. Example for DMI Lane Reversal Connection
Notes:
1. DMI Lane Reversal is supported only on CNP PCH-H and not on the Processor.
2. L[7:0] - Processor and PCH DMI Controller Logical Lane Numbers.
3. P[7:0] - Processor and PCH DMI Package Pin Lane Numbers.