Libreboot
https://libreboot.org/Supported Motherboards - coreboot
https://www.coreboot.org/Supported_MotherboardsPINEBOOK – PINE64
https://www.pine64.org/?page_id=3707China's Loongson makes a 64-bit Mips processor that runs x86 and ARM code | VentureBeat | Business | by Dean Takahashi
https://venturebeat.com/2015/09/03/chinas-loongson-makes-a-64-bit-mips-processor-that-can-run-x86-and-arm-code/Rhombus-Tech
http://rhombus-tech.net/GitHub - osresearch/heads: A minimal Linux that runs as a coreboot ROM payload to provide a secure, flexible boot environment for laptops and servers.
https://github.com/osresearch/heads