8.4. Debugging BOOM¶
In addition to the default debugging techniques specified in Debugging RTL, single-core BOOM designs can utilize the Dromajo co-simulator (see Dromajo) to verify functionality.
Warning
Dromajo currently only works in single-core BOOM systems without accelerators.
Warning
Dromajo currently only works in VCS simulation and FireSim.
8.4.1. Setting up Dromajo Co-simulation¶
Dromajo co-simulation is setup to work when two config fragments are added to a BOOM config.
First, a chipyard.config.WithTraceIO
config fragment must be added so that BOOM’s traceport is enabled.
Second, a chipyard.iobinders.WithSimDromajoBridge
config fragment must be added to
connect the Dromajo co-simulator to the traceport.
Once both config fragments are added Dromajo should be enabled.
To build/run Dromajo with a BOOM design, run your configuration the following make commands:
# build the default Dromajo BOOM config without waveform dumps
# replace "DromajoBoomConfig" with your particular config
make CONFIG=DromajoBoomConfig ENABLE_DROMAJO=1
# run a simulation with Dromajo
make CONFIG=DromajoBoomConfig ENABLE_DROMAJO=1 BINARY=<YOUR-BIN> run-binary