The Java protoc plugin (part of FIRRTL) by default caches protoc in /tmp, and does not delete it afterwards. This causes permissions failures when multiple users try to install Chipyard on the same machine, due to permissions failures over accessing the same cache in /tmp. A solution is to place the tmpdir within the Chipyard repo. No other files besides protocjar.webcache currently use that directory, so I believe this should be safe.
Chipyard Framework 
Using Chipyard
To get started using Chipyard, see the documentation on the Chipyard documentation site: https://chipyard.readthedocs.io/
What is Chipyard
Chipyard is an open source framework for agile development of Chisel-based systems-on-chip. It will allow you to leverage the Chisel HDL, Rocket Chip SoC generator, and other Berkeley projects to produce a RISC-V SoC with everything from MMIO-mapped peripherals to custom accelerators. Chipyard contains processor cores (Rocket, BOOM, CVA6 (Ariane)), accelerators (Hwacha, Gemmini, NVDLA), memory systems, and additional peripherals and tooling to help create a full featured SoC. Chipyard supports multiple concurrent flows of agile hardware development, including software RTL simulation, FPGA-accelerated simulation (FireSim), automated VLSI flows (Hammer), and software workload generation for bare-metal and Linux-based systems (FireMarshal). Chipyard is actively developed in the Berkeley Architecture Research Group in the Electrical Engineering and Computer Sciences Department at the University of California, Berkeley.
Resources
- Chipyard Documentation: https://chipyard.readthedocs.io/
- Chipyard Basics slides: https://fires.im/micro19-slides-pdf/02_chipyard_basics.pdf
- Chipyard Tutorial Exercise slides: https://fires.im/micro19-slides-pdf/03_building_custom_socs.pdf
Need help?
- Join the Chipyard Mailing List: https://groups.google.com/forum/#!forum/chipyard
- If you find a bug, post an issue on this repo
Contributing
- See CONTRIBUTING.md
Attribution and Chipyard-related Publications
If used for research, please cite Chipyard by the following publication:
@article{chipyard,
author={Amid, Alon and Biancolin, David and Gonzalez, Abraham and Grubb, Daniel and Karandikar, Sagar and Liew, Harrison and Magyar, Albert and Mao, Howard and Ou, Albert and Pemberton, Nathan and Rigge, Paul and Schmidt, Colin and Wright, John and Zhao, Jerry and Shao, Yakun Sophia and Asanovi\'{c}, Krste and Nikoli\'{c}, Borivoje},
journal={IEEE Micro},
title={Chipyard: Integrated Design, Simulation, and Implementation Framework for Custom SoCs},
year={2020},
volume={40},
number={4},
pages={10-21},
doi={10.1109/MM.2020.2996616},
ISSN={1937-4143},
}
These additional publications cover many of the internal components used in Chipyard. However, for the most up-to-date details, users should refer to the Chipyard docs.
- Generators
- Sims
- Tools
- VLSI
- Hammer: E. Wang, et al., ISQED'20. PDF.
