Re: [PATCH v3] docs/system/ppc: Document running Linux on AmigaNG machines

[Bernhard Beschow]

Am 9. März 2024 11:34:56 UTC schrieb BALATON Zoltan <balaton@eik.bme.hu>:
>On Thu, 29 Feb 2024, BALATON Zoltan wrote:
>> On Wed, 21 Feb 2024, BALATON Zoltan wrote:
>>> Documentation on how to run Linux on the amigaone, pegasos2 and
>>> sam460ex machines is currently buried in the depths of the qemu-devel
>>> mailing list and in the source code. Let's collect the information in
>>> the QEMU handbook for a one stop solution.
>> 
>> Ping? (Just so it's not missed from next pull.)
>
>Ping for freeze.

Has this patch been tagged yet? It would really be a pity if it didn't make it 
into 9.0.

FWIW:

Reviewed-by: Bernhard Beschow <shentey@gmail.com>

>
>> Regards,
>> BALATON Zoltan
>> 
>>> Co-authored-by: Bernhard Beschow <shentey@gmail.com>
>>> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
>>> Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
>>> Tested-by: Bernhard Beschow <shentey@gmail.com>
>>> ---
>>> v3: Apply changes and Tested-by tag from Bernhard
>>> v2: Move top level title one level up so subsections will be below it in TOC
>>> 
>>> MAINTAINERS                 |   1 +
>>> docs/system/ppc/amigang.rst | 161 ++++++++++++++++++++++++++++++++++++
>>> docs/system/target-ppc.rst  |   1 +
>>> 3 files changed, 163 insertions(+)
>>> create mode 100644 docs/system/ppc/amigang.rst
>>> 
>>> diff --git a/MAINTAINERS b/MAINTAINERS
>>> index 7d61fb9319..0aef8cb2a6 100644
>>> --- a/MAINTAINERS
>>> +++ b/MAINTAINERS
>>> @@ -1562,6 +1562,7 @@ F: hw/rtc/m41t80.c
>>> F: pc-bios/canyonlands.dt[sb]
>>> F: pc-bios/u-boot-sam460ex-20100605.bin
>>> F: roms/u-boot-sam460ex
>>> +F: docs/system/ppc/amigang.rst
>>> 
>>> pegasos2
>>> M: BALATON Zoltan <balaton@eik.bme.hu>
>>> diff --git a/docs/system/ppc/amigang.rst b/docs/system/ppc/amigang.rst
>>> new file mode 100644
>>> index 0000000000..ba1a3d80b9
>>> --- /dev/null
>>> +++ b/docs/system/ppc/amigang.rst
>>> @@ -0,0 +1,161 @@
>>> +=========================================================
>>> +AmigaNG boards (``amigaone``, ``pegasos2``, ``sam460ex``)
>>> +=========================================================
>>> +
>>> +These PowerPC machines emulate boards that are primarily used for
>>> +running Amiga like OSes (AmigaOS 4, MorphOS and AROS) but these can
>>> +also run Linux which is what this section documents.
>>> +
>>> +Eyetech AmigaOne/Mai Logic Teron (``amigaone``)
>>> +===============================================
>>> +
>>> +The ``amigaone`` machine emulates an AmigaOne XE mainboard by Eyetech
>>> +which is a rebranded Mai Logic Teron board with modified U-Boot
>>> +firmware to support AmigaOS 4.
>>> +
>>> +Emulated devices
>>> +----------------
>>> +
>>> + * PowerPC 7457 CPU (can also use``-cpu g3, 750cxe, 750fx`` or ``750gx``)
>>> + * Articia S north bridge
>>> + * VIA VT82C686B south bridge
>>> + * PCI VGA compatible card (guests may need other card instead)
>>> + * PS/2 keyboard and mouse
>>> +
>>> +Firmware
>>> +--------
>>> +
>>> +A firmware binary is necessary for the boot process. It is a modified
>>> +U-Boot under GPL but its source is lost so it cannot be included in
>>> +QEMU. A binary is available at
>>> +https://www.hyperion-entertainment.com/index.php/downloads?view=files&parent=28.
>>> +The ROM image is in the last 512kB which can be extracted with the
>>> +following command:
>>> +
>>> +.. code-block:: bash
>>> +
>>> +  $ tail -c 524288 updater.image > u-boot-amigaone.bin
>>> +
>>> +The BIOS emulator in the firmware is unable to run QEMU‘s standard
>>> +vgabios so ``VGABIOS-lgpl-latest.bin`` is needed instead which can be
>>> +downloaded from http://www.nongnu.org/vgabios.
>>> +
>>> +Running Linux
>>> +-------------
>>> +
>>> +There are some Linux images under the following link that work on the
>>> +``amigaone`` machine:
>>> +https://sourceforge.net/projects/amigaone-linux/files/debian-installer/.
>>> +To boot the system run:
>>> +
>>> +.. code-block:: bash
>>> +
>>> +  $ qemu-system-ppc -machine amigaone -bios u-boot-amigaone.bin \
>>> +                    -cdrom "A1 Linux Net Installer.iso" \
>>> +                    -device 
>>> ati-vga,model=rv100,romfile=VGABIOS-lgpl-latest.bin
>>> +
>>> +From the firmware menu that appears select ``Boot sequence`` →
>>> +``Amiga Multiboot Options`` and set ``Boot device 1`` to
>>> +``Onboard VIA IDE CDROM``. Then hit escape until the main screen appears 
>>> again,
>>> +hit escape once more and from the exit menu that appears select either
>>> +``Save settings and exit`` or ``Use settings for this session only``. It 
>>> may
>>> +take a long time loading the kernel into memory but eventually it boots 
>>> and the
>>> +installer becomes visible. The ``ati-vga`` RV100 emulation is not
>>> +complete yet so only frame buffer works, DRM and 3D is not available.
>>> +
>>> +Genesi/bPlan Pegasos II (``pegasos2``)
>>> +======================================
>>> +
>>> +The ``pegasos2`` machine emulates the Pegasos II sold by Genesi and
>>> +designed by bPlan. Its schematics are available at
>>> +https://www.powerdeveloper.org/platforms/pegasos/schematics.
>>> +
>>> +Emulated devices
>>> +----------------
>>> +
>>> + * PowerPC 7457 CPU (can also use``-cpu g3`` or ``750cxe``)
>>> + * Marvell MV64361 Discovery II north bridge
>>> + * VIA VT8231 south bridge
>>> + * PCI VGA compatible card (guests may need other card instead)
>>> + * PS/2 keyboard and mouse
>>> +
>>> +Firmware
>>> +--------
>>> +
>>> +The Pegasos II board has an Open Firmware compliant ROM based on
>>> +SmartFirmware with some changes that are not open-sourced therefore
>>> +the ROM binary cannot be included in QEMU. An updater was available
>>> +from bPlan, it can be found in the `Internet Archive
>>> +<http://web.archive.org/web/20071021223056/http://www.bplan-gmbh.de/up050404/up050404>`_.
>>> +The ROM image can be extracted from it with the following command:
>>> +
>>> +.. code-block:: bash
>>> +
>>> +  $ tail -c +85581 up050404 | head -c 524288 > pegasos2.rom
>>> +
>>> +Running Linux
>>> +-------------
>>> +
>>> +The PowerPC version of Debian 8.11 supported Pegasos II. The BIOS
>>> +emulator in the firmware binary is unable to run QEMU‘s standard
>>> +vgabios so it needs to be disabled. To boot the system run:
>>> +
>>> +.. code-block:: bash
>>> +
>>> +  $ qemu-system-ppc -machine pegasos2 -bios pegasos2.rom \
>>> +                    -cdrom debian-8.11.0-powerpc-netinst.iso \
>>> +                    -device VGA,romfile="" -serial stdio
>>> +
>>> +At the firmware ``ok`` prompt enter ``boot cd install/pegasos``.
>>> +
>>> +Alternatively, it is possible to boot the kernel directly without
>>> +firmware ROM using the QEMU built-in minimal Virtual Open Firmware
>>> +(VOF) emulation which is also supported on ``pegasos2``. For this,
>>> +extract the kernel ``install/powerpc/vmlinuz-chrp.initrd`` from the CD
>>> +image, then run:
>>> +
>>> +.. code-block:: bash
>>> +
>>> +  $ qemu-system-ppc -machine pegasos2 -serial stdio \
>>> +                    -kernel vmlinuz-chrp.initrd -append "---" \
>>> +                    -cdrom debian-8.11.0-powerpc-netinst.iso
>>> +
>>> +aCube Sam460ex (``sam460ex``)
>>> +=============================
>>> +
>>> +The ``sam460ex`` machine emulates the Sam460ex board by aCube which is
>>> +based on the AMCC PowerPC 460EX SoC (that despite its name has a
>>> +PPC440 CPU core).
>>> +
>>> +Firmware
>>> +--------
>>> +
>>> +The board has a firmware based on an older U-Boot version with
>>> +modifications to support booting AmigaOS 4. The firmware ROM is
>>> +included with QEMU.
>>> +
>>> +Emulated devices
>>> +----------------
>>> +
>>> + * PowerPC 460EX SoC
>>> + * M41T80 serial RTC chip
>>> + * Silicon Motion SM501 display parts (identical to SM502 on real board)
>>> + * Silicon Image SiI3112 2 port SATA controller
>>> + * USB keyboard and mouse
>>> +
>>> +Running Linux
>>> +-------------
>>> +
>>> +The only Linux distro that supported Sam460ex out of box was CruxPPC
>>> +2.x. It can be booted by running:
>>> +
>>> +.. code-block:: bash
>>> +
>>> +  $ qemu-system-ppc -machine sam460ex -serial stdio \
>>> +                    -drive if=none,id=cd,format=raw,file=crux-ppc-2.7a.iso 
>>> \
>>> +                    -device ide-cd,drive=cd,bus=ide.1
>>> +
>>> +There are some other kernels and instructions for booting other
>>> +distros on aCube's product page at
>>> +https://www.acube-systems.biz/index.php?page=hardware&pid=5
>>> +but those are untested.
>>> diff --git a/docs/system/target-ppc.rst b/docs/system/target-ppc.rst
>>> index 4f6eb93b17..87bf412ce5 100644
>>> --- a/docs/system/target-ppc.rst
>>> +++ b/docs/system/target-ppc.rst
>>> @@ -17,6 +17,7 @@ help``.
>>> .. toctree::
>>>    :maxdepth: 1
>>> 
>>> +   ppc/amigang
>>>    ppc/embedded
>>>    ppc/powermac
>>>    ppc/powernv
>>