RTL versus SystemC Models - 1.0 English

Versal ACAP Programmable Network on Chip and Integrated Memory Controller LogiCORE IP Product Guide (PG313)

Document ID
PG313
Release Date
2022-12-14
Version
1.0 English

The Vivado® tool suite supports two simulation models for the NoC: a SystemC transaction level model, (tlm), and a System Verilog register transfer model, (rtl). The tlm model is fast and efficient while the rtl model is near cycle-accurate (typically within 5% of hardware).

Because the NoC routing solution is compiled from an aggregation of the traffic specifications of all of the NoC instances in the design, a single simulation model is constructed to represent the NoC as configured by the compiler. It is not possible to mix rtl simulation for some NoC instances and tlm for others. If there is a mismatch in simulation models an error will be issued during validate_bd_design.

The simulation model selection can be made by setting the SELECTED_SIM_MODEL property on each of the axi_noc and axis_noc instances. The possible values of SELECTED_SIM_MODEL are rtl (the default) and tlm. On the IP integrator canvas select each axi_noc instance and set the SELECTED_SIM_MODEL property in the Block Properties menu. From Tcl issue the following command.

set_property SELECTED_SIM_MODEL tlm [get_bd_cells /axi_noc_0]