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

[Nicholas Piggin]

On Tue Mar 12, 2024 at 7:28 PM AEST, Bernhard Beschow wrote:
>
>
> 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.

Will send out a PR today and I'll include it.

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

Thanks, always helpful.

Thanks,
Nick

>
> >
> >> 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
> >>