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Re: [Qemu-devel] [PATCH 00/12] Add MVME3100 PPC SBC

From: David Gibson
Subject: Re: [Qemu-devel] [PATCH 00/12] Add MVME3100 PPC SBC
Date: Wed, 22 Nov 2017 15:12:17 +1100
User-agent: Mutt/1.9.1 (2017-09-22)

On Sun, Nov 19, 2017 at 09:24:08PM -0600, Michael Davidsaver wrote:
> This series adds simulation of MVME3100 powerpc SBCs, originally from 
> Motorola,
> and now sold by Artesyn[1].  There are two variants differing in CPU
> speed and memory size.
> I've been working on this sporadically for the past 2 year.  Recently I've
> finished all the features which I have in mind.  If this series is accepted
> there is a continuation which adds VME bus.  I've found it
> useful in software compatibility testing.  I wonder if there is
> any interest at large?
> There are two main parts of this series.  1-5 are changing code common
> with the "ppce500" and "mpc8544ds" boards, with the remainder being
> additions.
> The changes are to how the CCSR region is handled in order to support
> the CCSRBAR register which allows the whole region to be relocated.
> Also added are a couple of memory and clock configuration registers
> which RTEMS guests read.
> #3 is actually a minor issue I found recently with the mpc8544 PCI host 
> bridge,
> which I'm uncertain how to address.  The host bridge device 0:0 identifies
> itself as a bridge, but doesn't properly implement the bridge config 
> registers.
> This confuses Linux, which then does a full re-enumeration (successfully).
> The rest are additions of an I2C controller, an I2C eeprom, an I2C RTC,
> and new board code.
> My testing has been almost exclusively with an RTEMS guest[2].
> Though I have recently done a little with Linux.
> RTEMS guests (and Linux too for now) require a stub bootloader[3] to
> put the system in the same state as the real bootloader.
> RTEMS has an unfortunately strong dependence on bootloader
> provided configuration (eg. it doesn't re-enumerate the PCI bus).

I've applied several patches from this series to ppc-for-2.12, others
I've commented on.  If you could address the comments and rebase
what's left on ppc-for-2.12, that would be great.

David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!

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