QEMU is a free and open-source emulator that performs hardware virtualization. Official reference can be found here.
[env:myenv] platform = ... board = ... debug_tool = qemu
|SiFive||SiFive brings the power of open source and software automation to the semiconductor industry, making it possible to develop new hardware faster and more affordably than ever before.|
|Freedom E SDK||Open Source Software for Developing on the SiFive Freedom E Platform|
|Zephyr||The Zephyr Project is a scalable real-time operating system (RTOS) supporting multiple hardware architectures, optimized for resource constrained devices, and built with safety and security in mind.|