Several i.MX SoC versions, for example i.MX7D, i.MX6SX and the i.MX8
derivates are asymmetric multiprocessing (AMP) systems: They have at
least one ARM Cortex A core and at least one ARM Cortex M core.
The Barebox project has released version 2014.03.0 of its bootloader:
The Barebox project has released version 2014.02.0 of its bootloader: