7.7.7. CHI LPID assignment

CHI TXREQ transactions include the Logical Processor ID (LPID) field. This field uniquely identifies the logical processor that generated the request transaction.

The multiprocessor uses the following LPID values:

0b000

Processor 0 request.

0b001

Processor 1 request.

0b010

Processor 2 request.

0b011

Processor 3 request.

0b100

ACP request.

0b111

L2 hardware flush request.

Secondary transactions such as copybacks from the L2, because of cache fills caused by processor or ACP access L2 misses, use the LPID of the request that caused the copyback.

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