To write software for the Sapphire SoCs, you need the RISC-V SDK. The SDK includes:

• Eclipse MCU—Open-source Java-based development environment that uses plug-ins to extend and customize its functionality. The GNU MCU Eclipse plug-in lets you develop applications for ARM and RISC-V cores.
  Version: 2020-09 (4.17.0)
  Disk space required: 433 MB (Windows), 433 MB (Linux)
• xPack GNU RISC-V Embedded GCC—Open-source, prebuilt toolchain from the xPack Project.
  Version: 8.3.0-2.3
  Disk space required: 1.53 GB (Windows), 1.5 GB (Linux)
• OpenOCD Debugger—The open-source Open On-Chip Debugger (OpenOCD) software includes configuration files for many debug adapters, chips, and boards. Many versions of OpenOCD are available. The Efinix RISC-V flow requires a custom version of OpenOCD that includes the VexRiscv 32-bit RISC-V processor.
  Version: 20200421
  Disk space required: 9.4 MB (Windows), 7.4 MB (Linux)
• GNU MCU Eclipse Windows Build Tool (Windows Only)—This open-source Windowsspecific package helps to manage build projects and includes GNU make.
  Version: 4.2.1-2-win32-x64
  Disk space required: 4.99 MB

Note: the Ruby, Jade, and Opal SoCs are end of life in the Efinity software v2022.1.226. If you need the SDK for those SoCs, download v1.4 not the latest version.