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Re: [PATCH v8 0/5] Mac Old World ROM experiment (ppc/mac_* clean ups and

From: BALATON Zoltan
Subject: Re: [PATCH v8 0/5] Mac Old World ROM experiment (ppc/mac_* clean ups and loading binary ROM)
Date: Fri, 16 Oct 2020 14:19:16 +0200 (CEST)

On Fri, 16 Oct 2020, Mark Cave-Ayland wrote:
On 16/10/2020 00:47, BALATON Zoltan via wrote:
This is the cut down version of the earlier series omitting unfinished
patches that I plan to rework later and rebased to Mark's qemu-macppc
branch. Compared to v7 the only change is the cast to (target_ulong)
from (uint32_t) as requested by Mark in patch 1.

FWIW the reason for suggesting the cast to target_ulong is so that the same code works for both qemu-system-ppc and qemu-system-ppc64. For qemu-system-ppc that should correctly drop the sign extension from 32-bit, whilst still allowing someone to load a 64-bit ELF into qemu-system-ppc64 if requested.

Can you confirm that the sign extension behaviour is still correct for both qemu-system-ppc and qemu-system-ppc64? If so I'm happy to give it a R-B tag.

I've tried it now again with both ppc and ppc64: both OpenBIOS and a G3 beige ROM can be loaded with qemu-system-ppc but qemu-system-ppc64 fails with OpenBIOS when casting to target_ulong (i think because target_ulong is 64 bit there but g3beige is still 32 bit but I haven't throughly debugged it). But everything works with my original uint32_t cast, so ditch it and use my original version. Should I resubmit or you can fix up? (I think I wait until it's clear if this will be taken by David or you and send a fixed version cc-ing David if this is decided to go through the PPC queue.)


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