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OpenROAD seeks to develop and foster an autonomous, 24-hour, open-source layout generation flow (RTL-to-GDS).
- About OpenROAD
- OpenROAD Mission
- Getting Started with OpenROAD-flow-scripts
- Tapeouts
- Build OpenROAD
- Regression Tests
- Run
- Git Quickstart
- Understanding Warning and Error Messages
OpenROAD is the leading open-source, foundational application for semiconductor digital design. The OpenROAD flow delivers an Autonomous, No-Human-In-Loop (NHIL) flow, 24 hour turnaround from RTL-GDSII for rapid design exploration and physical design implementation.
OpenROAD eliminates the barriers of cost, schedule risk and uncertainty in hardware design to promote open access to rapid, low-cost IC design software and expertise and system innovation. The OpenROAD application enables flexible flow control through an API with bindings in Tcl and Python.
OpenROAD is used in research and commercial applications such as,
•OpenROAD-flow-scripts from OpenROAD
•OpenLane from Efabless
•Silicon Compiler from Zero ASIC
•Hammer from UC Berkeley
OpenROAD provides OpenROAD-flow-scripts as a native, ready-to-use prototyping and tapeout flow. However, it also enables the creation of any custom flow controllers based on the underlying tools, database and analysis engines. Please refer to the flow documentation here.
OpenROAD-flow-scripts (ORFS) is a fully autonomous, RTL-GDSII flow for rapid architecture and design space exploration, early prediction of QoR and detailed physical design implementation. However, ORFS also enables manual intervention for finer user control of individual flow stages through Tcl commands and Python APIs.
Figure below shows the main stages of the OpenROAD-flow-scripts:
Here are the main steps for a physical design implementation using OpenROAD;
•Floorplanning
•Floorplan initialization - define the chip area, utilization
OpenTitan SoC on GF12LP - Physical design and optimization using OpenROAD Continuous Tapeout Integration into CI
The OpenROAD project actively adds successfully taped out MPW shuttle designs to the CI regression testing. Examples of designs include Open processor cores, RISC-V based SoCs, cryptocurrency miners, robotic app processors, amateur satellite radio transceivers, OpenPower-based Microwatt etc.
To build OpenROAD tools locally in your machine, follow steps from here.
There are a set of executable regression test scripts in ./test/.
The flow tests check results such as worst slack against reference values. Use report_flow_metrics [test]... to see all of the metrics.
OpenROAD sources the Tcl command file ~/.openroad unless the command line option -no_init is specified.
OpenROAD then sources the command file cmd_file if it is specified on the command line. Unless the -exit command line flag is specified, it enters an interactive Tcl command interpreter.
OpenROAD uses Git for version control and contributions. Get familiarised with a quickstart tutorial to contribution here.
Seeing OpenROAD warnings or errors you do not understand? We have compiled a table of all messages and you may potentially find your answer here.
OpenROAD is a project that aims to develop open-source tools for hardware design in advanced technologies. It aims to remove the barriers of cost, expertise and risk by enabling autonomous, 24-hour layout design for SOC with no PPA loss.
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OpenROAD, which stands for "Open Rapid Object Application Development", is a fourth-generation programming language (4GL) and development suite from Actian Corporation. It includes a suite of development tools, with built-in Integrated development environment (IDE) (Written in OpenROAD), and Code Repository.
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