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Testing the PCI Parity Error Detection of IXP4XX-Based Platforms

IP.com Disclosure Number: IPCOM000125127D
Publication Date: 2005-May-19
Document File: 3 page(s) / 163K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method that combines a PCI exerciser card and test software on the IXP4XX to perform quick testing for parity errors on the PCI bus.

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Testing the PCI Parity Error Detection of IXP4XX-Based Platforms

Disclosed is a method that combines a PCI exerciser card and test software on the IXP4XX to perform quick testing for parity errors on the PCI bus.

Background

The IXP4XX network processor provides an external PCI bus interface. There is a PCI controller embedded in the IXP4XX, and it can function either as a PCI initiator or as a PCI target. In the IXP4XX CSR 2.0 software release, a parity access component is created to allow the client application to configure parity error detection options on the IXP4XX, and to forward parity error notification to the client application.

Parity error detection is a new feature in the IXP4XX CSR 2.0 software release. Currently, there is no existing method for testing parity errors on the PCI bus for the IXP4XX CSR 2.0
software release.

General Description

The disclosed method combines a PCI exerciser card and test software on the IXP4XX to perform quick testing for parity errors detection on the PCI bus. Because the PCI controller can function either as a PCI initiator or a PCI target, there are two ways to approach parity error testing on the PCI bus:

§         When the IXP4XX PCI controller is functioning as a PCI initiator, it must be set up for parity error detection. The PCI exerciser card is then programmed to generate a parity error on the PCI bus. After that, the IXP4XX PCI controller reads from the PCI bus; if a parity error is detected by the parity access component, the test software is notified.

§         When the IXP4XX PCI controller is functioning as a PCI target, it must be set up for parity error detection. The PCI exerc...