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Re: [Qemu-devel] [PATCH 0/6] ppc: add a IBM 40p machine (RS/6000, PReP)

From: Artyom Tarasenko
Subject: Re: [Qemu-devel] [PATCH 0/6] ppc: add a IBM 40p machine (RS/6000, PReP)
Date: Sun, 15 Jan 2017 20:23:17 +0100

On Sat, Jan 14, 2017 at 2:11 PM, Hervé Poussineau <address@hidden> wrote:
> Le 13/01/2017 à 13:23, Mark Cave-Ayland a écrit :
>>> OpenBIOS doesn't support PReP boot partitions (type 0x41) nor PReP
>>> kernels so this is a no-go yet.
>> Just out of interest, is it just the PReP boot partition support that is
>> missing from OpenBIOS? If so, that should be fairly easy to implement if
>> there's a spec lying around somewhere.
> 2 things are missing to boot from hard disk/cdrom:
> - support for LSI SCSI adapter
> - support for PReP boot partition support
> However, if you want to boot with -kernel, you only need to have support for
> PReP boot partition.
> Partial specification is available at:
> ftp://ftp.software.ibm.com/rs6000/technology/spec/srp1_1.exe
> section 5.3 (Loading the Load Image)
> and
> section 5.4 (Transferring System Control to Load Image)
>> It would be great if we could finally remove OHW from QEMU :)
> I fully agree on that!

Attached an OFW build with LSI support.
To boot from the LSI disk type
boot /scsi/disk

In theory OFW should support the S3-Trio too, but my first attempt
failed on DAC initialisation. Will get back to it later.
This build it supports  -vga std and -vga cirrus and uses serial
console by default.


Artyom Tarasenko

SPARC and PPC PReP under qemu blog: http://tyom.blogspot.com/search/label/qemu

Attachment: qprepofw.rom
Description: Binary data

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