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Re: [Qemu-ppc] [RFC PATCH 09/12] ppc440: Add emulation of plb-pcix contr

From: BALATON Zoltan
Subject: Re: [Qemu-ppc] [RFC PATCH 09/12] ppc440: Add emulation of plb-pcix controller found in some 440 SoCs
Date: Fri, 18 Aug 2017 14:34:40 +0200 (CEST)
User-agent: Alpine 2.21 (BSF 202 2017-01-01)

On Fri, 18 Aug 2017, luigi burdo wrote:
hi Balaton,

Ciao Luigi,

i can help with amigaos4 for sam .
i can test it on P5040 book3e and on G5 quad book3s machine.

Thanks for the offer but unfortunately that would not help because these are different CPUs than the 460EX used in the Sam board. I'd definitely need logs from Sam460ex or Sam460cr, other logs are not the same and not help to find differences between real hardware and emulation.

note sam for boot amigaos need a special modified version of uboot that is available on acube website it is a firmware update. without modified uboot will be not posdible auto boot amigaos.

I know about this and if you read the cover message (RFC PATCH 00/12) I link to a fixed version of that U-Boot firmware (rebuilt from source with the mentioned patches) which works with this emulation. (The original one from the updater also starts but cannot boot due to some problems which are fixed by these patches in my image. This is described in the cover message.) With that fixed firmware image it should be possible to at least try booting AmigaOS on the emulation and get some logs. I'd be surprised if it also worked at this point but I could not try it as it needs an appropriate AmigaOS version that runs on the Sam460. It should produce some logs though with -serial stdio which may help finding what is missing.

idont know if is possible use standard uboot incuded in qemu for boot amigaos from uboot command line. i can ask help to Enrico Vidale as my FB friend but i dont know if he will be available for this kind of helping.

I think it would not be possible to use the U-Boot in QEMU now as that is for e500 CPU but this is not needed either. See above, we are aiming to emulate enough of the board that it can run the original firmware which should be able to boot these Amiga like OSes and normal Linux images used on the Sam460ex. This already works but things fail after or during boot currently. This is what needs to be debugged. So we'd need someone who has a Sam460 (ex or cr) board and can test on that to get logs from OSes on real hardware for comparison.


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