Re: [Qemu-devel] Re: [OpenBIOS] QEMU OpenBIOS booting?

[François Revol]

> On 4/20/09, M. Warner Losh <address@hidden> wrote:
> > In message: <
> > address@hidden>
> >             Blue Swirl <address@hidden> writes:
> >
> > : On 4/19/09, M. Warner Losh <address@hidden> wrote:
> >  : > In message: <
> > address@hidden>
> >  : >
> >  : >             Steven Noonan <address@hidden> writes:
> >  : >  : I eventually decided it made more
> >  : >  : sense to get QEMU working instead. I did notice that the
> > pre-OpenBIOS
> >  : >  : version of QEMU was able to boot Mac OS X via Open
> > Hack'Ware, so I was
> >  : >  : annoyed to find that OpenBIOS didn't have such support. So,
> > I might as
> >  : >  : well add it.
> >  : >
> >  : >
> >  : > Open Hackware was barely enough to boot older versions of
> > Linux.
> >  : >  Other operating systems that needed more extensive properties
> > from the
> >  : >  OpenFirmware device tree failed to boot because they weren't
> > present.
> >  : >  I was involved in a large effort to get FreeBSD/powerpc
> > booting on
> >  : >  QEMU only to have it fail utterly because the amount of
> > hacking on
> >  : >  OpenHackWare needed was rather large and mysterious...
> >  :
> >  : This is what I get with OpenBIOS:
> >  : >> *** Boot failure! No secondary bootloader specified ***
> >  :
> >  : 0 > boot cd:,\boot\loader cd:0
> >  : Consoles: Open Firmware console
> >  :
> >  : FreeBSD/Open Firmware/PowerPC bootstrap loader, Revision 0.1
> >  : (address@hidden, Thu Apr 16 18:47:58 UTC 2009)
> >  : Memory: 131072KB
> >  : Booted from: cd
> >  :
> >  : Loading /boot/defaults/loader.conf
> >  : /boot/kernel/kernel data=0x4a4ce0+0x3d4e4 syms=[0x4+0x454f0+0x4+
> > 0x5a4b9]
> >  : /
> >  : Hit [Enter] to boot immediately, or any other key for command
> > prompt.
> >  : Booting [/boot/kernel/kernel]...
> >  : Kernel entry at 0x13dac0 ...
> >  : panic: moea_bootstrap: no space to copy translations
> >  : Uptime: 1s
> >
> >
> > That's similar to the one that I've seen as well.  The problem with
> >  this one, IIRC, is that FreeBSD/powerpc is trying to setup the
> > memory
> >  translations for the MMU and the 'translations' property length is
> >  zero, or something like that...
>
> Right, the error comes from this line:
> http://fxr.watson.org/fxr/source/powerpc/powerpc/mmu_oea.c?v=FREEBSD70#L825
>
FWIW, Haiku still stops somewhere at
http://dev.haiku-os.org/browser/haiku/trunk/src/system/boot/platform/openfirmware/arch/ppc/mmu.cpp#L968
...

address@hidden ~/devel/haiku/trunk]$ qemu-system-ppc -nographic -serial
stdio -cdrom generated.ppc/haiku-boot-cd-ppc.iso -boot d
>> =============================================================
>> OpenBIOS 1.0 [Mar 31 2009 15:35]
>> Configuration device id QEMU version 1 machine id 2
>> CPUs: 1
>> Memory: 128M
>> UUID: 00000000-0000-0000-0000-000000000000
>> CPU type PowerPC,750
Welcome to OpenBIOS v1.0 built on Mar 31 2009 15:35


checking for memory...
0: base = 0x00000000, size = 134217728
1: empty region
total physical memory = 128 MB
suggested page table size = 1048576
need new page table, size = 1048576!
new table at: 0x07d00000
MSR: 0x00003030
found 4 translations
found page table!
no mapping for the exception handlers!

François.