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[doc] Describe counters more explicitly in simple_system README

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Rupert Swarbrick 2023-11-20 16:58:43 +00:00 • committed by Gary Guo
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13
examples/simple_system/README.md
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@ -27,13 +27,20 @@ run stand-alone binaries. It contains:
## Building Simulation
The Simple System simulator binary can be built via FuseSoC. From the Ibex
repository root run:
The Simple System simulator binary can be built via FuseSoC. This can be built
with different configurations of Ibex, specified by parameters. To build the
"small" configuration, run the following command from the Ibex repository root.
```
fusesoc --cores-root=. run --target=sim --setup --build lowrisc:ibex:ibex_simple_system --RV32E=0 --RV32M=ibex_pkg::RV32MFast
fusesoc --cores-root=. run --target=sim --setup --build \
lowrisc:ibex:ibex_simple_system $(util/ibex_config.py small fusesoc_opts)
```
To see performance counters other than the total number of instructions
executed, you will need to ask for a larger configuration. One possible example
comes from replacing `small` in the command above with `opentitan`.
## Building Software
Simple System related software can be found in `examples/sw/simple_system`.