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A Verification Environment for PCI-X BFMs in VERA

By Renwei Wang, Zongyao Wen and Synopsys Inc


Conventionally, the method for testing Synopsys Bus Functional Models (BFMs) was to typically create a set of command files, with each of them testing a particular functional area. This process was and is time consuming because tests for all possible cases must be created manually. In this paper, we will document a new verification environment that takes the advantage of the VERA language for verifying Synopsys PCI-X BFMs. The environment produces test bench code which is highly reusable due to object-oriented programming (OOP) techniques. The effort on directed testing is greatly reduced by specifying only the areas to be tested. This system can support three entries: directed testing, random testing, and playback. The play back scheme is important when a bug is found after days of random run/testing with a single reset. The use of CoverMeter and a coverage object in VERA is also addressed in this paper. However, a functional coverage object was not fully implemented. Using this verification methodology, we are able to improve the quality of our models much faster. This environment can also be adapted to verify a custom PCI-X design. Keyword: VERA, PCI-X, Coverage, Random Testing, and Verificatio

Year: 2008
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