[Qemu-ppc] FreeBSD powerpc issue

[Andreas Tobler]

Hello,

I'm trying to get FreeBSD powerpc running with qemu.
So far it loads the fbsd loader and the loader loads the kernel.
The kernel starts booting but it hangs in an endless loop. It tries to 
print out a fatal_trap but it looks like the 'of' doesn't work properly 
(anymore?) at this stage.

I have a remote debugger attached to the kernel and I can see where it 
hangs. But I can not figure out what caused the fatal trap here.

An 'info registers' in qemu shows the srr0=fff025a4, this, as I 
understand, points to of_client_callback from OpenBIOS. (objdump -dS 
openbios-qemu.nostrip gives me this.)

qemu is on 1.1.90, iow, a git snapshot from yesterday with OpenBIOS from 
19th of aug.

Is there a possibilty to 'debug' the OpenBIOS somehow?

I'm not sure whether it is a kernel issue or an OpenBIOS issue.

Any hint is welcome.

TIA,
Andreas

Here some info, it might help...

telnet localhost 1200
Trying ::1...
Connected to localhost.
Escape character is '^]'.
>> Configuration device id QEMU version 1 machine id 2
>> CPUs: 1
>> Memory: 255M
>> UUID: 00000000-0000-0000-0000-000000000000
>> CPU type PowerPC,750
Welcome to OpenBIOS v1.0 built on Aug 19 2012 13:11
Trying cd:,\\:tbxi...
Consoles: Open Firmware console

FreeBSD/powerpc Open Firmware loader, Revision 0.1
(address@hidden, Sun Aug 19 10:32:07 CEST 2012)
Memory: 261120KB
Booted from: cd

Loading /boot/defaults/loader.conf
/boot/kernel/kernel text=0xb1ff27 data=0x5ff60+0x1ac7d0 
syms=[0x4+0x8c690+0x4+0xae1e0]
/
Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [/boot/kernel/kernel]...
Kernel entry at 0x100100 ...
KDB: debugger backends: ddb
KDB: current backend: ddb


QEMU 1.1.90 monitor - type 'help' for more information
(qemu) info registers
NIP 009463ec   LR 009463b0 CTR 0094638c XER 00000000
MSR 00001032 HID0 00000000  HF 00000000 idx 1
TB 00000000 1000640182 DECR 3294327117
GPR00 0000000000000001 0000000000c7ba00 0000000080020400 000000000fd00000
GPR04 00000000005b5128 000000000094638c 00000000005b5128 0000000000c7bab0
GPR08 000000000fd00000 0000000000c7bab0 0000000000000000 0000000000c7ba00
GPR12 000000000de9bba0 0000000000000000 00000000fff30714 00000000fff30ec8
GPR16 00000000fff2f256 0000000004000000 00000000fffb36cc 00000000fffb3ecc
GPR20 0000000000f68000 0000000000000004 00000000fff2f03f 00000000fff2efbf
GPR24 00000000fff2f047 00000000fffb3630 0000000001c2f3b0 0000000001c325a8
GPR28 0000000080020002 0000000000805180 00000000f97ff97f 0000000000c7ba00
CR 40003034  [ G  -  -  -  EO -  EO G  ]             RES ffffffff
FPR00 0000000000000000 0000000000000000 0000000000000000 0000000000000000
FPR04 0000000000000000 0000000000000000 0000000000000000 0000000000000000
FPR08 0000000000000000 0000000000000000 0000000000000000 0000000000000000
FPR12 0000000000000000 0000000000000000 0000000000000000 0000000000000000
FPR16 0000000000000000 0000000000000000 0000000000000000 0000000000000000
FPR20 0000000000000000 0000000000000000 0000000000000000 0000000000000000
FPR24 0000000000000000 0000000000000000 0000000000000000 0000000000000000
FPR28 0000000000000000 0000000000000000 0000000000000000 0000000000000000
FPSCR 00000000
 SRR0 fff025a4  SRR1 40003030    PVR 00080301 VRSAVE 00000000
SPRG0 0fd00000 SPRG1 00c7c090  SPRG2 0094e3f0  SPRG3 00000400
SPRG4 00000000 SPRG5 00000000  SPRG6 00000000  SPRG7 00000000
 SDR1 0100001f