[OpenBIOS] [PATCH 00/11] PReP support for QEMU 40p machine

[Mark Cave-Ayland]

On 26/05/18 20:29, Mark Cave-Ayland wrote:

> The current PReP firmware provided with OpenBIOS is OpenHackWare which provides
> a basic set of OpenFirmware interfaces but does this without providing any kind
> of Forth implementation which limits its usefulness and compatibility.
> 
> Whilst the project has allowed QEMU PReP development to continue to date, it is
> sadly now abandonware with no patches for over 4 years, and with no-one willing
> to take on maintenance it is now time for a different approach.
> 
> This patchset adds PReP support for the QEMU 40p machine allowing it to start
> booting NetBSD and the sandalfoot Linux zImage. The main features required for
> this are support for the LSI SCSI controller, resdidual data and PReP boot
> partitions.
> 
> In order to test these patches you'll need a recent QEMU with the following
> patches applied:
> 
>      https://lists.gnu.org/archive/html/qemu-devel/2018-05/msg05480.html
>      https://lists.gnu.org/archive/html/qemu-devel/2018-05/msg05964.html
>      
> Next you'll need an updated openbios-ppc binary, and for those without access to
> a cross-compiler setup I've uploaded the resulting binary to
> https://www.ilande.co.uk/tmp/qemu/openbios-ppc.prep.
> 
> To boot the sandalfoot zImage from http://www.juneau-lug.org/zImage.initrd.sandalfoot
> you can do:
> 
>      qemu-system-ppc -M 40p -bios openbios-ppc.prep -cdrom zImage.initrd.sandalfoot
>          -boot d
>          
> Note that it seems to get stuck trying to initialise the LSI SCSI controller,
> presumably due to a bug in the existing QEMU emulation.
> 
> NetBSD works much better and in fact boots all the way to userspace:
> 
>      qemu-system-pcc -M 40p -bios openbios-ppc.prep -cdrom NetBSD-7.1.2-prep.iso
>          -boot d -nographic
> 
> In terms of functionality I think this patchset is just about there: there are a
> few questions around device names but hopefully someone with real PReP experience
> can point me in the right direction.
> 
> Finally I've added various people on CC who have expressed interest in PReP and/or
> OpenHackWare in the past: if this is no longer of any interest to you, do let me
> know and I'll drop your email address from future versions.
> 
> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland at ilande.co.uk>
> 
> 
> Mark Cave-Ayland (11):
>    pc_kbd: ensure that we properly reset the 8042 controller and keyboard
>      device
>    pci: rename i82378 keyboard device from 8042 to keyboard
>    pci: add AMD PCNET information to PCI database
>    bootcode_load: ensure LOADER_NOT_SUPPORT is returned if no bootcode is
>      present
>    ppc: add PReP support to dma-map-in
>    pci: add driver for LSI 53C810 SCSI controller
>    ppc: add PReP residual data block
>    ppc: use proper context when pre-loading kernels
>    pc-parts: allow successful detection of PReP boot partitions
>    libopenbios: add PReP boot partition loader for PPC
>    prep: disable VBE extensions when executing client program
> 
>   arch/ppc/qemu/context.c         | 129 ++++++-
>   arch/ppc/qemu/context.h         |   1 +
>   arch/ppc/qemu/init.c            |  34 ++
>   arch/ppc/qemu/kernel.h          |   1 -
>   arch/ppc/qemu/main.c            |  11 +-
>   arch/ppc/qemu/switch.S          |  43 ---
>   arch/ppc/qemu/tree.fs           |   5 -
>   config/examples/ppc_config.xml  |   2 +
>   drivers/build.xml               |   1 +
>   drivers/lsi.c                   | 770 ++++++++++++++++++++++++++++++++++++++++
>   drivers/pc_kbd.c                |  22 +-
>   drivers/pci.c                   |  21 +-
>   drivers/pci_database.c          |  14 +
>   drivers/pci_database.h          |   1 +
>   drivers/vga.fs                  |  11 +
>   forth/debugging/client.fs       |   1 +
>   include/arch/ppc/residual.h     | 116 ++++++
>   include/drivers/drivers.h       |   4 +
>   include/drivers/pci.h           |   6 +
>   include/libopenbios/prep_load.h |  24 ++
>   libopenbios/bootcode_load.c     |   2 +
>   libopenbios/build.xml           |   1 +
>   libopenbios/initprogram.c       |   8 +
>   libopenbios/load.c              |  11 +
>   libopenbios/prep_load.c         | 106 ++++++
>   packages/pc-parts.c             |  10 +
>   26 files changed, 1300 insertions(+), 55 deletions(-)
>   create mode 100644 drivers/lsi.c
>   create mode 100644 include/arch/ppc/residual.h
>   create mode 100644 include/libopenbios/prep_load.h
>   create mode 100644 libopenbios/prep_load.c

This passes all my local tests, so I've applied it to master.


ATB,

Mark.