User guide

19-36

Using the VCS / SystemC Cosimulation Interface

Generation of the TLI Adapters

The following command generates SystemVerilog and SystemC

source code for the TLI adapters from the specified interface definition

file:

syscan -tli_gen interface_definition_file

syscan -tli_gen_class interface_definition_file

The command generates SystemC and SystemVerilog files that

define the TLI adapters for each language domain. All generated files

can be compiled just like any other source file for the corresponding

domain. The files have to be generated again only when the content

of the interface definition file changes.

TLI adapters for the sv_calls_sc direction can be generated in two

different styles. The SystemC part of the generate adapter is the same

for both styles, however the SystemVerilog part is different. Option

-tli_gen creates a SystemVerilog "interface". Option

-tli_gen_class creates a SystemVerilog "class". Both styles have

benefits and penalties.

A class is generally easier to connect into the SystemVerilog source

code and there are situations where a SystemVerilog testbench

allows to instantiate a class but not an interface. However, if a class

is generated, then the TLI adapter can create only one connection of

this type between the SystemVerilog and SystemC side. If, on the

other hand, an interface is generated, then multiple connections can

be created (which are distinguished by the integer parameter of the

interface).