[OpenBIOS] sparc32 boot breakage on ppc host

[Andreas Färber]

Am 10.04.2009 um 14:57 schrieb Blue Swirl:

> On 4/10/09, Andreas Färber <andreas.faerber at web.de> wrote:
>
>> [...] It
>> hangs after "Booting file ... with parameters ''  
>> Trying ..." (before "Not a
>> bootable ELF image").
>>
>> These are the results of my bisection:
>>
>> r482 (QEMU r6962) nope
>> r479 (QEMU r6777) nope
>> 1.0 (QEMU r6658 +
>> 9794f74f9c1dd0fbef30ded9e5c14c28a6fa579b) nope
>> ??? (QEMU r6563 +
>> 9794f74f9c1dd0fbef30ded9e5c14c28a6fa579b) nope
>> ??? (QEMU r6273 + e58ffeb322e2ef88cc23e9505366418bf793316d
>> w/ --disable-aio) works
>> r237 (QEMU r5262) works
>>
>> Has anyone recently been successful booting on ppc, could this be  
>> some
>> endianness issue? It works fine on OpenSolaris/amd64 host.
>
> It also works on OpenBSD/Sparc64 host, which is big endian. Linux/i386
> works too, so 32 bit case is covered.
>
> I doubt that this can be a problem in OpenBIOS, I find QEMU more
> likely suspect. Can you boot any other big endian targets on PPC, for
> example PPC?

Yes, ppc-softmmu boots Debian CD fine.

However, ppc64-softmmu booting Debian CD segfaults immediately.

sparc64-softmmu booting Solaris 10 U3 DVD immediately crashes with the  
following output:

qemu: fatal: Trap 0x0010 while trap level (5) >= MAXTL (5), Error state
pc: 0000000000004200  npc: 0000000000004204
General Registers:
%g0: 0000000000000000	%g1: 0000000000000000	%g2: 0000000000000000	%g3:  
0000000000000000	
%g4: 0000000000000000	%g5: 0000000000000000	%g6: 0000000000000000	%g7:  
0000000000000000	
Current Register Window:
%o0: 00000000ffd70000	%o1: 00000000ffd71000	%o2: 000001fff0070000	%o3:  
000001fff0000000	
%o4: 0000000000000000	%o5: 0000000000000000	%o6: 0000000000000000	%o7:  
000001ff00000000	
%l0: 000000000fee0000	%l1: 000001ff00000000	%l2: 000001fff0030000	%l3:  
0000000000000000	
%l4: 0000000000000000	%l5: 0000000000000000	%l6: 0000000000000000	%l7:  
0000000000000000	
%i0: 0000000000000000	%i1: 0000000000000000	%i2: 0000000000000000	%i3:  
0000000000000000	
%i4: 0000000000000000	%i5: 0000000000000000	%i6: 0000000000000000	%i7:  
0000000000000000	

Floating Point Registers:
%f00: 000000000.000000 000000000.000000 000000000.000000  
000000000.000000
%f04: 000000000.000000 000000000.000000 000000000.000000  
000000000.000000
%f08: 000000000.000000 000000000.000000 000000000.000000  
000000000.000000
%f12: 000000000.000000 000000000.000000 000000000.000000  
000000000.000000
%f16: 000000000.000000 000000000.000000 000000000.000000  
000000000.000000
%f20: 000000000.000000 000000000.000000 000000000.000000  
000000000.000000
%f24: 000000000.000000 000000000.000000 000000000.000000  
000000000.000000
%f28: 000000000.000000 000000000.000000 000000000.000000  
000000000.000000
pstate: 0x00000015 ccr: 0x99 asi: 0x00 tl: 5 fprs: 0
cansave: 6 canrestore: 0 otherwin: 0 wstate 0 cleanwin 6 cwp 7
fsr: 0x00000000

Andreas