Hi,

On Thu, Mar 15, 2018 at 10:56:48AM +0100, Arnd Bergmann wrote:

On Thu, Mar 15, 2018 at 10:42 AM, David Howells [off-list ref] wrote:

quoted

Do we have anything left that still implements NOMMU?

Please don't kill !MMU.

Yes, plenty.

I've made an overview of the remaining architectures for my own reference[1].
The remaining NOMMU architectures are:

- arch/arm has ARMv7-M (Cortex-M microcontroller), which is actually
gaining traction

ARMv7-R as well, also seems ARM is coming up with more !MMU's - v8-M,
v8-R. In addition, though only of academic interest, ARM MMU capable
platform's can run !MMU Linux.

afzal

- arch/sh has an open-source J2 core that was added not that long ago,
it seems to
  be the only SH compatible core that anyone is working on.
- arch/microblaze supports both MMU/NOMMU modes (most use an MMU)
- arch/m68k supports several NOMMU targets, both the coldfire SoCs and the
  classic processors
- c6x has no MMU