[OpenBIOS] QEMU / OpenBIOS booting SunOS 4.1.3 / 4.1.4

[Stefan Reinauer]

Dear Jason,

> Therefore, emulation is the approach I'd really like to pursue if it's
> possible.
> 
> Has anyone got SunOS 4.x to boot under QEMU using the latest OpenBIOS
> firmware instead of PROLL ?
 
Unfortunately no. I tried NetBSD 3.0 and Solaris 8 so far, both did not
work (yet). 

> Is anyone out there even working on this possibility. or is the focus on
> Linux or one of the NetBSD / OpenBSD implementations ?

We're definitely looking into getting operating systems besides Linux to
work on (qemu/)OpenBIOS/Sparc32, but we can also use help here.

I got NetBSD booting the kernel, but it fails reading the root
filesystem:
Welcome to OpenBIOS v1.0RC1 built on Jun 5 2006 15:07
  Type 'help' for detailed information

[sparc] Kernel already loaded
OBP version 3, revision 2.25 (plugin rev 2)
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 3.0 (GENERIC) #0: Mon Dec 19 04:01:27 UTC 2005
        builds at b3.netbsd.org:/home/builds/ab/netbsd-3-0-RELEASE/sparc/200512182024Z-obj/home/builds/ab/netbsd-3-0-RELEASE/src/sys/arch/sparc/compile/GENERIC
total memory = 127 MB
avail memory = 120 MB
bootpath:
data fault: pc=0xf02a4f3c addr=0x7ff000
sfsr=126<PERR=0,LVL=1,AT=1,FT=1,FAV,OW>
panic: kernel fault
halted

Booting from the NetBSD 3.0 CD (sparccd-3.0.iso) I got an exception,
since the a.out header shows some weird values:

Welcome to OpenBIOS v1.0RC1 built on Jun 5 2006 15:07
  Type 'help' for detailed information

[sparc] Booting file 'cdrom' with parameters '<NULL>'
Loading a.out image...
  N_TXTADDR: 0x00002000 (0x30800007 bytes)
  N_TXTOFF : 0x00000020 (0x00000200)
  N_DATADDR: 0x30802007 (0 bytes)
Loaded 8388615(0x30800007) bytes
entry point is 0x4000
Jumping to entry point...
Unhandled Exception 0x00000002
PC = 0x00000000 NPC = 0x00000004
Stopping execution


Booting Solaris 8 I get:
Welcome to OpenBIOS v1.0RC1 built on Jun 5 2006 15:07
  Type 'help' for detailed information

[sparc] Booting file 'cdrom' with parameters '<NULL>'
Loading a.out image...
Loaded 7680 bytes
entry point is 0x4000
Jumping to entry point...
bootblk: can't find the boot program
halt, power off

So it tries to load /platform/sun4m/utfboot from CD and fails.

Any help is appreciated.

Stefan