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A formalisation of XMAS

By Bernard van Gastel and Julien Schmaltz

Abstract

Communication fabrics play a key role in the correctness and performance of modern multi-core processors and systems-on-chip. To enable formal verification, a recent trend is to use high-level micro-architectural models to capture designers' intent about the communication and processing of messages. Intel proposed the xMAS language to support the formal definition of executable specifications of micro-architectures. We formalise the semantics of xMAS in ACL2. Our formalisation represents the computation of the values of all wires of a design. Our main function computes a set of possible routing targets for each message and whether a message can make progress according to the current network state. We prove several properties on the semantics, including termination, non-emptiness of routing, and correctness of progress conditions. Our current effort focuses on a basic subset of the entire xMAS language, which includes queues, functions, and switches

Topics: Mathematics, QA1-939, Electronic computers. Computer science, QA75.5-76.95
Publisher: Open Publishing Association
Year: 2013
DOI identifier: 10.4204/EPTCS.114.9
OAI identifier: oai:doaj.org/article:26aec09b266a444f84b605f21bf89b9f
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  • http://arxiv.org/pdf/1304.7862... (external link)
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