From: Igor Kovalenko <igor.v.kovalenko@gmail.com>
To: Mark Cave-Ayland <mark.cave-ayland@siriusit.co.uk>
Cc: The OpenBIOS Mailinglist <openbios@openbios.org>,
qemu-devel <qemu-devel@nongnu.org>
Subject: [Qemu-devel] Re: [OpenBIOS] [PATCH 0/3] sparc64 cleanups v1
Date: Fri, 28 May 2010 13:03:28 +0400 [thread overview]
Message-ID: <AANLkTimZgNM88BAscCvNC9pHDPFeT8LjBvGSawrvywVp@mail.gmail.com> (raw)
In-Reply-To: <4BFF8223.5040701@siriusit.co.uk>
On Fri, May 28, 2010 at 12:43 PM, Mark Cave-Ayland
<mark.cave-ayland@siriusit.co.uk> wrote:
> Igor Kovalenko wrote:
>
>> With many debian iso images I consistently get scrolling blanks after
>> the following line on qemu video console:
>>
>> io sched cfq registered (default)
>>
>> Please share your qemu command line, and installer prompt input if any.
>
> Yeah, I do too. I originally thought that the Debian kernel was broken, but
> if you leave it long enough then it does proceed to the end. My guess is
> that there is a bug in the OpenBIOS console which is obscuring the output.
I allowed it to scroll and now I can confirm it would crash with tl=5.
Last insn is ldda with ASI=0x24 (Nucleus quad LDD 128 bit atomic)
IN:
0x0000000000424d18: ldda [ %g1 ] (36), %g4
0x0000000000424d1c: cmp %g4, %g6
0x0000000000424d20: bne,pn %xcc, 0x4076c0
0x0000000000424d24: mov 2, %g3
qemu: fatal: Trap 0x0068 while trap level (5) >= MAXTL (5), Error state
pc: 0000000000424d18 npc: 0000000000424d1c
General Registers:
%g0-3: 0000000000000000 0000000008000000 0000000000004000 0000000000000002
%g4-7: 00000000000003ff 0000000000000001 0000000000000020 0000000000004000
Well, not sure how it worked before. Related code in helper_ld_asi() states:
case 0x24: // Nucleus quad LDD 128 bit atomic
case 0x2c: // Nucleus quad LDD 128 bit atomic LE
// Only ldda allowed
raise_exception(TT_ILL_INSN);
return 0;
HelenOS also uses quad ldd when configured with TSB for memory management.
I guess that atomic quad ldd deserves to be implemented. I'll see if
it is not hard.
--
Kind regards,
Igor V. Kovalenko
prev parent reply other threads:[~2010-05-28 9:03 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20100525121143.19347.27207.stgit@skyserv>
[not found] ` <AANLkTik2dc9regcA_9ADT_K7-sKCXLXED5Av9i3cjjEE@mail.gmail.com>
2010-05-27 16:57 ` [Qemu-devel] Re: [OpenBIOS] [PATCH 0/3] sparc64 cleanups v1 Mark Cave-Ayland
2010-05-27 20:42 ` Blue Swirl
2010-05-28 3:13 ` Igor Kovalenko
2010-05-28 4:31 ` Igor Kovalenko
2010-05-28 8:43 ` Mark Cave-Ayland
2010-05-28 9:03 ` Igor Kovalenko [this message]
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