I have been watching this project from the early days and I'm impressed with the recient progress.
This is probably old news but a quick search of the archives here did not show anything up.
Yaboot. Yaboot is the bootloader used by owners of macintosh and other ppc machines with open firmware to boot linux from openfirmware. The home page seems to be http://penguinppc.org/projects/yaboot/
Perhaps when the time comes to boot an operating system with openbios yaboot and linux will be good candidates.
Of course I may be completely off track!
Bye for now Alex Owen
On Monday 05 January 2004 21:02, Alex Owen wrote:
Yaboot. Yaboot is the bootloader used by owners of macintosh and other ppc machines with open firmware to boot linux from openfirmware. The home page seems to be http://penguinppc.org/projects/yaboot/
Perhaps when the time comes to boot an operating system with openbios yaboot and linux will be good candidates.
Of course I may be completely off track!
Don't worry, only slightly ;-)
Yes, I boot my workstation in the office with yaboot, and indeed the path is openfirmware->yaboot->ELF-kernel(in an ext2fs). As you can see yaboot mediates between the openfirmware, ignorant of ext2fs, and the linux kernel. I haven't checked whether the firmware can launch ELF.
By now ELF seems to be the format of choice already for anything surrounding OpenBIOS, so no problem with that. All that's left is (readonly!) ext2fs code, as in FILO or GrUB (or yaboot :-); and as one can see in these projects, it's not such a big deal. We'll probably see a forth version of an ext2fs well before someone seriously starts using yaboot.
Torsten
On Mon, Jan 05, 2004 at 08:02:21PM +0000, Alex Owen wrote:
I have been watching this project from the early days and I'm impressed with the recient progress.
This is probably old news but a quick search of the archives here did not show anything up.
Yaboot. Yaboot is the bootloader used by owners of macintosh and other ppc machines with open firmware to boot linux from openfirmware. The home page seems to be http://penguinppc.org/projects/yaboot/
Perhaps when the time comes to boot an operating system with openbios yaboot and linux will be good candidates.
Hehe... this is already working.
I've been merging the Mac-on-Linux mini-OpenFirmware (which did not parse forth code but provided all the client interface callbacks as well as filesystem support) with OpenBIOS. There are still some things to do but overall the merge is pretty much finished.
The latest OpenBIOS version is capable of booting both yaboot (and Linux) and MacOS 9. MOL is actually close to a perfect platform for developing OpenBIOS (well, at least for non-POST stuff).
For those who want to take a look at the merged code, everything is in a BitKeeper repository (bk://openbios.bkbits.net/unstable).
/Samuel
On Tue, 6 Jan 2004, Samuel Rydh wrote:
Perhaps when the time comes to boot an operating system with openbios yaboot and linux will be good candidates.
Hehe... this is already working.
I've been merging the Mac-on-Linux mini-OpenFirmware (which did not parse forth code but provided all the client interface callbacks as well as filesystem support) with OpenBIOS. There are still some things to do but overall the merge is pretty much finished.
what is interesting is that linuxbios works on PPC.
So a full linuxbios->openbios->your code exists, if anyone wants to put it together, that would be all open-source.
ron
* Torsten Duwe duwe@lst.de [040106 02:20]:
Yes, I boot my workstation in the office with yaboot, and indeed the path is openfirmware->yaboot->ELF-kernel(in an ext2fs). As you can see yaboot mediates between the openfirmware, ignorant of ext2fs, and the linux kernel. I haven't checked whether the firmware can launch ELF.
By now ELF seems to be the format of choice already for anything surrounding OpenBIOS, so no problem with that. All that's left is (readonly!) ext2fs code, as in FILO or GrUB (or yaboot :-); and as one can see in these projects, it's not such a big deal. We'll probably see a forth version of an ext2fs well before someone seriously starts using yaboot.
For code reusability the forth-c bindings have been advanced during the big mol-openbios merger and there is support written in C for HFS and HFS+ in the tree. Once the tree works fine again for all builds it should be easy to add for example grub-fs bindings to openbios to reuse grub's filesystem drivers.
Stefan
* ron minnich rminnich@lanl.gov [040106 04:15]:
what is interesting is that linuxbios works on PPC.
So a full linuxbios->openbios->your code exists, if anyone wants to put it together, that would be all open-source.
Everything that is needed has already been merged into the OpenBIOS tree (currently only in BK, not in CVS) The ppc architecture code of OpenBIOS already has a dummy target for an MPC107 board, like the Embedded Planet EP405pc which is supported by LinuxBIOS. It probably needs some fiddling to get everything working on real hardware, but we're really close now.. If somebody wants to look at this, please do!
Stefan
On Tue, Jan 06, 2004 at 03:24:55PM +0100, Stefan Reinauer wrote:
- ron minnich rminnich@lanl.gov [040106 04:15]:
what is interesting is that linuxbios works on PPC.
So a full linuxbios->openbios->your code exists, if anyone wants to put it together, that would be all open-source.
Everything that is needed has already been merged into the OpenBIOS tree (currently only in BK, not in CVS) The ppc architecture code of OpenBIOS already has a dummy target for an MPC107 board, like the Embedded Planet EP405pc which is supported by LinuxBIOS. It probably needs some fiddling to get everything working on real hardware, but we're really close now.. If somebody wants to look at this, please do!
I actually have the MPC107 board I added that target for (a PowerPC 750 CPU on a PCI card). I wrote the POST stuff for it some time ago so it should be simple enough to get OpenBIOS running on it.
/Samuel
* Samuel Rydh samuel@ibrium.se [040106 15:37]:
Everything that is needed has already been merged into the OpenBIOS tree (currently only in BK, not in CVS) The ppc architecture code of OpenBIOS already has a dummy target for an MPC107 board, like the Embedded Planet EP405pc which is supported by LinuxBIOS. It probably needs some fiddling to get everything working on real hardware, but we're really close now.. If somebody wants to look at this, please do!
I actually have the MPC107 board I added that target for (a PowerPC 750 CPU on a PCI card). I wrote the POST stuff for it some time ago so it should be simple enough to get OpenBIOS running on it.
We still need a PCI driver though to get FCode supported components to really work
Stefan
On Tue, Jan 06, 2004 at 03:41:13PM +0100, Stefan Reinauer wrote:
- Samuel Rydh samuel@ibrium.se [040106 15:37]:
Everything that is needed has already been merged into the OpenBIOS tree (currently only in BK, not in CVS) The ppc architecture code of OpenBIOS already has a dummy target for an MPC107 board, like the Embedded Planet EP405pc which is supported by LinuxBIOS. It probably needs some fiddling to get everything working on real hardware, but we're really close now.. If somebody wants to look at this, please do!
I actually have the MPC107 board I added that target for (a PowerPC 750 CPU on a PCI card). I wrote the POST stuff for it some time ago so it should be simple enough to get OpenBIOS running on it.
We still need a PCI driver though to get FCode supported components to really work
Actually, in this particular case this is not really needed. The board is not supposed to access other PCI devices since that would interfere with the main system.
One has to write a custom drivers though (a simple tty driver for instance) and eventually a video driver (the card can access main memory so one just needs to reserve a piece of main memory and write a linux side client to display it). It is even possible to bus master directly to the VGA card although one would have to be a bit careful with locking issues etc.
Btw. MOL fully emulates the PCI bus (including BAR relocation and FCODE roms) so it should be simple enough to test the PCI (when implemented) in MOL.
/Samule
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Alex Owen -
ron minnich -
Samuel Rydh -
Stefan Reinauer -
Torsten Duwe