NonBlockingDcache module in Verilog

I am trying to replace the Nonblocking Dcache Module in the verilogfile. Please let me know how can I do that? or how can I add a new verilog file to the existing
emulator/generated-srcfreechips.rocketchip.system.DefaultConfig.v. What I understand that this file is auto generated so as all the modules. Any suggestion will be appreciated very much!

Start by tracing how emulator/generated-srcfreechips.rocketchip.system.DefaultConfig.v and its modules are generated, since the issue identifies that file as autogenerated. Determine the supported replacement or extension path and define completion around adding or substituting the NonBlockingDcache module without editing generated output directly.

Written by the indexing model from the issue text.