Hoisting old designs is unnecessary when you have x86 processors like Intel Atom, which are exactly that, and all the versions of ARM Cortex-R3 and R0. The pro

Hoisting old designs is unnecessary when you have x86 processors like Intel Atom, which are exactly that, and all the versions of ARM Cortex-R3 and R0. The problem is not the processor, it's the lack of MMU and/or special DMA or interrupt engines and special GPIO. No kernel is potentially ported to such custom infrastructure, and if you have a very tiny flash, few of the ones which could will fit. (Say, target L4, porting Fiasco or OKL4.)