From: "Marty E. Plummer" <hanetzer@startmail.com>
To: "Cédric Le Goater" <clg@kaod.org>
Cc: Joel Stanley <joel@jms.id.au>,
qemu-ppc@nongnu.org, qemu-devel@nongnu.org,
David Gibson <david@gibson.dropbear.id.au>
Subject: Re: qemu/powernv: coreboot support?
Date: Sat, 19 Oct 2019 11:09:34 -0500 [thread overview]
Message-ID: <20191019160933.fizoc6tpu5jday4o@proprietary-killer> (raw)
In-Reply-To: <1cbd1882-15c8-5471-cd65-1c84c2920ba8@kaod.org>
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On Sat, Oct 19, 2019 at 05:53:12PM +0200, Cédric Le Goater wrote:
> On 19/10/2019 17:31, Marty E. Plummer wrote:
> > On Sat, Oct 19, 2019 at 03:46:59PM +0200, Cédric Le Goater wrote:
> >> On 18/10/2019 19:28, Marty E. Plummer wrote:
> >>> Hello,
> >>>
> >>> First off, thank you for the work you've done on the ppc64 support, it
> >>> has been very useful. I'm currently working on a coreboot port for the
> >>> talos ii line of systems (which means more ppc64 support, support
> >>> specifically for the power9 sforza chip, and specific mainboard support.
> >>> My plate is very full lol) and have been using qemu to debug the
> >>> bootblock.
> >>>
> >>> It has been very useful for that, but I'm now at the point where I need
> >>> to jump to romstage, and that's where it gets tricky. qemu parses the rom
> >>> image and looks for a ffs header, locates skiboot on it, and jumps straight
> >>> to that. Not exactly ideal for debugging something not produced from op-build.
> >>
> >> yes. I suppose you are using my branch powernv-4.2 which adds PNOR support
> >> and a way to boot directly from PNOR. In that case, QEMU parses the PNOR
> >> file to extract the PAYLOAD partition (skiboot). skiboot also detects the
> >> flash and extract the kernel and initramfs from the PNOR.
> >>
> >> However, you can bypass all this internal boot process by simply passing
> >> a -bios option and not passing a MTD device.
> >>
> > Doing so gives me the following error:
> > qemu-system-ppc64: Could not load OPAL firmware 'build/coreboot.rom'
> > (this is after I patched the 4mb size limit up)
>
> Could you make that rom available ?
>
Sure, I think. Not sure about how sending files works in my current mail
client but will see. Its more or less a 'stock' (as stock as can be for
a new coreboot target) coreboot.rom file, but I've added some logic into
the build to fake a pnor ffs header at the end in order to trick hostboot
bootloader into loading it.
> Thanks,
>
> C.
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next prev parent reply other threads:[~2019-10-19 16:12 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-18 17:28 qemu/powernv: coreboot support? Marty E. Plummer
2019-10-19 11:15 ` David Gibson
2019-10-19 12:28 ` Marty E. Plummer
2019-10-19 13:46 ` Cédric Le Goater
2019-10-19 15:31 ` Marty E. Plummer
2019-10-19 15:53 ` Cédric Le Goater
2019-10-19 16:09 ` Marty E. Plummer [this message]
2019-10-20 6:28 ` David Gibson
2019-10-20 6:51 ` Cédric Le Goater
2019-10-20 16:32 ` Marty E. Plummer
2019-10-21 5:34 ` David Gibson
2019-10-21 12:46 ` Cédric Le Goater
2019-10-22 0:32 ` Marty E. Plummer
2019-10-22 1:40 ` David Gibson
2019-10-22 2:17 ` Marty E. Plummer
2019-10-22 7:55 ` David Gibson
2019-10-22 7:58 ` Cédric Le Goater
2019-10-23 21:41 ` Marty E. Plummer
2019-10-19 18:51 ` Marty E. Plummer
2019-10-19 19:23 ` Marty E. Plummer
2019-10-20 19:48 ` Peter Maydell
2019-10-21 9:51 ` Philippe Mathieu-Daudé
2019-10-20 6:26 ` David Gibson
2019-10-20 6:24 ` David Gibson
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