The Embedded Base Boot Requirements (EBBR) specification defines requirements for embedded systems to enable inter-operability between SoCs, hardware platforms, firmware implementations, and operating system distributions. The aim is to establish consistent boot ABIs and behaviour so that supporting new hardware platforms does not require custom engineering work.
https://github.com/ARM-software/ebbr/releases/tag/v0.7
https://github.com/ARM-software/ebbr
https://github.com/ARM-software/ebbr/wiki
see-also:
Firmware Security 