From: Thomas Huth <thuth@redhat.com>
To: David Gibson <david@gibson.dropbear.id.au>
Cc: "Christophe Leroy" <christophe.leroy@c-s.fr>,
"Peter Maydell" <peter.maydell@linaro.org>,
dbarboza@redhat.com, "Alexey Kardashevskiy" <aik@ozlabs.ru>,
"QEMU Developers" <qemu-devel@nongnu.org>,
"Christophe Leroy" <christophe.leroy@csgroup.eu>,
"Greg Kurz" <groug@kaod.org>, "Alexander Graf" <agraf@csgraf.de>,
qemu-ppc <qemu-ppc@nongnu.org>,
"Wainer dos Santos Moschetta" <wainersm@redhat.com>,
"Cleber Rosa" <crosa@redhat.com>,
"Hervé Poussineau" <hpoussin@reactos.org>,
"Philippe Mathieu-Daudé" <philmd@redhat.com>,
"Cédric Le Goater" <clg@kaod.org>
Subject: Re: Deprecate the ppc405 boards in QEMU?
Date: Mon, 11 Oct 2021 15:24:36 +0200 [thread overview]
Message-ID: <bcdf63a4-8d22-8b25-d980-7fc574f80e82@redhat.com> (raw)
In-Reply-To: <YWQB1FMhQfmqRYxN@yekko>
On 11/10/2021 11.20, David Gibson wrote:
> On Mon, Oct 11, 2021 at 10:10:36AM +0200, Thomas Huth wrote:
>> On 06/10/2021 09.25, Thomas Huth wrote:
>>> On 05/10/2021 23.53, BALATON Zoltan wrote:
>>> [...]
>>>> Maybe these 405 boards in QEMU ran with modified firmware where the
>>>> memory detection was patched out but it seems to detect the RAM so I
>>>> wonder where it gets that from. Maybe by reading the SDRAM
>>>> controller DCRs ppc4xx_sdram_init() sets up. Then I'm not sure what
>>>> it needs the SPD for, I forgot how this worked on sam460ex. Maybe
>>>> for the speed calibration, so could be it detects ram by reading
>>>> DCRs then tries to get SPD data and that's where it stops as i2c is
>>>> not emulated on taihu. This could be confirmed by checking what it
>>>> pokes with -d guest_errors that shows accesses to missing devices
>>>> but don't know where 405 has the i2c controller and if it's the same
>>>> as newer SoCs. If so that could be reused and an i2c bus could be
>>>> added with the SPD data like in sam460ex to make u-boot happy or you
>>>> could skip this in u-boot.
>>>
>>> FWIW, I've just tried the latter (skipping the sdram init in u-boot),
>>> and indeed, I can get to the u-boot prompt now.
>> [...]> I've also attached the patch with my modifications to u-boot.
>>
>> FYI, the changes can now be found on this branch here:
>>
>> https://gitlab.com/huth/u-boot/-/commits/taihu
>>
>> I also added a gitlab-CI file, so you can now download the u-boot.bin as an
>> artifact from the corresponding pipeline, e.g.:
>>
>> https://gitlab.com/huth/u-boot/-/jobs/1667201028
>
> Thanks.
>
> Are you going to send a v2 of your proposed deprecation patches?
No, since there was interest in keeping the 405 boards for testing the 405
code in the Linux kernel, and since there is now a way to do at least some
very basic testing of these boards (with the u-boot firmware), I don't plan
to respin the deprecation patch. I just sent a patch for adding the boards
to our CI instead:
https://lists.gnu.org/archive/html/qemu-devel/2021-10/msg02072.html
Thomas
next prev parent reply other threads:[~2021-10-11 13:29 UTC|newest]
Thread overview: 93+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-27 4:48 [PATCH v3 0/7] Reduce load on ppc target maintainers David Gibson
2021-09-27 4:48 ` [PATCH v3 1/7] qemu: Split machine_ppc.py acceptance tests David Gibson
2021-09-27 4:50 ` Philippe Mathieu-Daudé
2021-09-27 16:44 ` Philippe Mathieu-Daudé
2021-09-27 16:53 ` Cédric Le Goater
2021-09-27 17:18 ` Philippe Mathieu-Daudé
2021-09-27 4:48 ` [PATCH v3 2/7] MAINTAINERS: Remove machine specific files from ppc TCG CPUs entry David Gibson
2021-09-27 4:48 ` [PATCH v3 3/7] MAINTAINERS: Remove David & Greg as reviewers for a number of boards David Gibson
2021-09-27 4:48 ` [PATCH v3 4/7] MAINTAINERS: Orphan obscure ppc platforms David Gibson
2021-10-01 8:35 ` Deprecate the ppc405 boards in QEMU? (was: [PATCH v3 4/7] MAINTAINERS: Orphan obscure ppc platforms) Thomas Huth
2021-10-01 9:14 ` Christophe Leroy
2021-10-01 9:43 ` Thomas Huth
2021-10-01 11:12 ` Peter Maydell
2021-10-01 12:04 ` Thomas Huth
2021-10-01 13:04 ` Christophe Leroy
2021-10-01 13:14 ` Cédric Le Goater
2021-10-01 13:24 ` Peter Maydell
2021-10-01 14:18 ` Thomas Huth
2021-10-05 0:48 ` David Gibson
2021-10-05 4:44 ` Christophe Leroy
2021-10-05 6:18 ` Alexey Kardashevskiy
2021-10-05 6:42 ` Thomas Huth
2021-10-05 8:05 ` Alexey Kardashevskiy
2021-10-05 8:07 ` Thomas Huth
2021-10-05 8:51 ` Deprecate the ppc405 boards in QEMU? Thomas Huth
2021-10-05 12:17 ` BALATON Zoltan
2021-10-05 12:35 ` Thomas Huth
2021-10-05 21:53 ` BALATON Zoltan
2021-10-06 6:39 ` Thomas Huth
2021-10-06 7:25 ` Thomas Huth
2021-10-11 8:10 ` Thomas Huth
2021-10-11 9:20 ` David Gibson
2021-10-11 13:24 ` Thomas Huth [this message]
2021-10-19 9:31 ` Christophe Leroy
2021-10-19 9:39 ` Thomas Huth
2021-10-19 9:48 ` Christophe Leroy
2021-10-19 10:07 ` BALATON Zoltan
2021-10-19 11:11 ` Thomas Huth
2021-10-19 11:51 ` Christophe Leroy
2021-10-19 12:38 ` BALATON Zoltan
2021-10-19 13:44 ` Christophe Leroy
2021-10-19 14:24 ` Christophe Leroy
2021-10-19 14:56 ` BALATON Zoltan
2021-10-19 16:12 ` Christophe Leroy
2021-10-19 20:55 ` Cédric Le Goater
2021-10-19 21:30 ` Cédric Le Goater
2021-10-20 9:02 ` Christophe Leroy
2021-10-20 10:10 ` Cédric Le Goater
2021-10-20 13:27 ` LEROY Christophe
2021-10-20 14:31 ` BALATON Zoltan
2021-10-20 14:34 ` Thomas Huth
2021-10-20 14:41 ` Cédric Le Goater
2021-10-20 15:03 ` LEROY Christophe
2021-10-20 14:39 ` Cédric Le Goater
2021-10-20 15:28 ` LEROY Christophe
2021-10-20 10:21 ` Philippe Mathieu-Daudé
2021-10-20 11:40 ` BALATON Zoltan
2021-10-20 10:12 ` CLI: Using -bios AND -kernel Philippe Mathieu-Daudé
2021-10-20 10:54 ` Thomas Huth
2021-10-20 11:35 ` BALATON Zoltan
2021-10-19 9:41 ` Deprecate the ppc405 boards in QEMU? Greg Kurz
2021-10-05 8:14 ` Deprecate the ppc405 boards in QEMU? (was: [PATCH v3 4/7] MAINTAINERS: Orphan obscure ppc platforms) Cédric Le Goater
2021-10-05 12:20 ` BALATON Zoltan
2021-10-05 12:29 ` Thomas Huth
2021-10-20 10:26 ` Philippe Mathieu-Daudé
2021-10-20 11:42 ` BALATON Zoltan
2021-10-20 12:43 ` Cédric Le Goater
2021-10-20 13:16 ` LEROY Christophe
2021-10-20 15:04 ` Simon Marchi
2021-10-21 6:48 ` Christophe Leroy
2021-10-21 7:25 ` Deprecate the ppc405 boards in QEMU? Thomas Huth
2021-10-21 8:01 ` Christophe Leroy
2021-10-28 12:24 ` Deprecate the ppc405 boards in QEMU? (was: [PATCH v3 4/7] MAINTAINERS: Orphan obscure ppc platforms) Luis Machado
2021-10-28 17:27 ` Christophe Leroy
2021-10-20 13:35 ` Deprecate the ppc405 boards in QEMU? Thomas Huth
2021-10-20 14:55 ` BALATON Zoltan
2021-10-20 15:04 ` Thomas Huth
2021-10-20 14:16 ` Deprecate the ppc405 boards in QEMU? (was: [PATCH v3 4/7] MAINTAINERS: Orphan obscure ppc platforms) BALATON Zoltan
2021-10-05 8:49 ` Daniel P. Berrangé
2021-10-05 16:15 ` Philippe Mathieu-Daudé
2021-10-05 16:20 ` Daniel P. Berrangé
2021-10-27 4:06 ` Philippe Mathieu-Daudé
2021-10-27 8:40 ` Cédric Le Goater
2021-10-27 10:42 ` Christophe Leroy
2021-10-27 10:48 ` Philippe Mathieu-Daudé
2021-10-27 17:03 ` Cédric Le Goater
2021-09-27 4:48 ` [PATCH v3 5/7] MAINTAINERS: Remove David & Greg as reviewers/co-maintainers of powernv David Gibson
2021-09-27 4:48 ` [PATCH v3 6/7] MAINTAINERS: Add information for OpenPIC David Gibson
2021-09-29 7:08 ` Mark Cave-Ayland
2021-09-27 4:48 ` [PATCH v3 7/7] MAINTAINERS: Demote sPAPR from "Supported" to "Maintained" David Gibson
2021-09-30 1:15 ` [PATCH v3 0/7] Reduce load on ppc target maintainers David Gibson
2021-10-06 9:52 ` Alexey Kardashevskiy
2021-10-06 11:03 ` Greg Kurz
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