TMS570LC4357-EP: Compatible RTOS Options

Hello everyone,

I am looking for a RTOS that would work with the TMS570LC4357-EP (and/or compatible with the Cortex R5F in general).
I have contacted a number of companies and communication seems slow.

From searching the TI forums it seems that FreeRTOS and SafeRTOS are the only things that people are using.

Can someone tell me if the TI-RTOS can work with the TMS570LC4357 (Cortex R5F)?
Is FreeRTOS and SafeRTOS the only things that work with the Cortex R5F?

Thanks,
Ryan