Method and apparatus for recovering from system bus...

Details Method and apparatus for recovering from system bus... Method and apparatus for recovering from system bus...

2006-05-04

2010-11-16

Baderman, Scott T (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

Reexamination Certificate

active

07836328

ABSTRACT:
A method and apparatus for recovering from errors occurring during system bus transactions. An input/output device such as a network interface unit (NIU) issues read and write operations across a meta interface coupling the device to host bus (glue) logic. The host bus logic translates the operations into system bus transactions. The device maintains a set of reusable identifiers for identifying the operations, and a table maintained by the device or the host bus logic maps the operation identifiers to transaction identifiers identifying the system bus transactions spawned to perform the operations. If a bus transaction encounters an unrecoverable error, the host bus logic reports the error to the device and drops any further data received from other bus transactions performed for the same operation. The device marks the operation's identifier as dirty, to prevent its reuse. The operation identifier may be reused after software clears the error condition.

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Split Transaction Feature for the Intel® PXA27x Processor Family, Intel Corporation, (Oct. 2004).

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