To facilitate easy configuration of platform models, the IP models for these components can provide a shadow parameter for these ports. This parameter can be used to change the value that is used by the model. In these cases, the following rules apply:

• If a port is driven in the platform model, then the parameter value is ignored.
• If a port is not driven in the platform model, then the parameter value is sampled at both simulator reset, and at every subsequent simulation reset of the specific IP model.

  Note:

  Simulator reset corresponds with the LISA reset() behavior and the SystemC start_of_simulation() callback.
• All ports and parameters that are sampled at reset are sampled when the simulation reset signal concerned is deasserted.
• If a port is not driven in the platform model, and a parameter has not been set, then the default value for the parameter is used.

In some IP models, the value of some ports can only be set by using a parameter. That is, the parameter is provided instead of the port.