[PATCH RFC 2/4] powerpc: Add Microwatt platform

[Alistair Popple]

On Saturday, 9 May 2020 5:58:57 PM AEST Nicholas Piggin wrote:
> Excerpts from Paul Mackerras's message of May 9, 2020 3:02 pm:
> > Microwatt is a FPGA-based implementation of the Power ISA.  It
> > currently only implements little-endian 64-bit mode, and does
> > not (yet) support SMP.
> > 
> > This adds a new machine type to support FPGA-based SoCs with a
> > Microwatt core.
> 
> Very cool!
> 
> Would there be any point sharing this with the "naked metal" platform
> Alistair has for booting POWER in L3 without OPAL? Or is it easy enough
> to have a several different simple 64s platforms?

It looks pretty similar at the moment, I've been meaning to clean those 
patches up and send them upstream but Paul has beaten me to it. The main 
difference so far is how the console is setup. For booting cache contained I 
was using a device tree pointing at a standard UART driver and enabling the 
standard OF platform device tree probing.

- Alistair

> I have an HPT conditional compile patch and a few other diet Kconfig
> things I'll now be better justified to try get merged :)
> 
> Thanks,
> Nick