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So how should I describe a BFM if I have to give its definition in this context?
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I'm not sure what you mean by describe.
A BFM is a simulation only component. When you want to use one, you instantiate it, and use it to generate stimulus on your source HDL or post-place-and-route RTL files.
You either obtain the BFM, eg., use Altera's Verification IP suite, or you code one up yourself.
The definition is in the name; its a functional model (simulation-only) of a bus, where a bus such as the Avalon-MM bus has an architecture specification defining the types of transactions over that bus. The BFM is a simulation implementation of the transactions in that bus specification; both Master BFM and Slave BFMs are available.
Cheers,
Dave
Honored Contributor
