I'll write a more in-depth reply when I have a moment, but right now I'd like to point out that the uio-pruss driver in mainline linux is for the pru subsystem on the freon/primus family of ARM9-based SoCs (OMAP-L1xx / AM17xx / AM18xx / TMS320C674x / DA8xx), which is not currently supported by remoteproc-pru. -- Matthijs van Duin