AMI has been into the x86/x64 platform for a long time, but now they’re porting some of their tools to ARM. Excerpting their press release:

American Megatrends Extends ROM Utilities Support for ARM-based Projects

AMI is extending their ROM Utilities support for ARM-based projects. These utilities allow modifications to be made to the ARM-based firmware images without having to rebuild the firmware. A single build can be modified and used on several platform derivatives. AMI customers now have additional support for various tools to use with ARM-based projects. ARM firmware support has been incorporated in the following AMI ROM Utilities: AMIBCP, AMISDE, ChangeLogo, and MMTool. These utilities allow for post-build configuration of certain settings within the ARM-based firmware images. Since the tools were extended to support ARM-based projects, the user experience remains the same. All the available tools are compatible with AMI’s flagship Aptio® V UEFI Firmware and designed to work in conjunction with the firmware.

* AMI ARM-based projects can be developed in the same Aptio development environment that BIOS engineers are already familiar with, including Linux support
* Full support for manufacturing with flash, SMBIOS, setup tools and more
* OEM customization tools are available to modify the firmware image without the need to rebuild the project

Unexcerpted PR:
https://ami.com/news/press-releases/?PressReleaseID=357