Date: Mon, 31 Dec 2001 01:55:37 -0800 From: Jamey Wood <Jamey.Wood@Sun.COM> To: freebsd-sparc@FreeBSD.ORG Subject: Re: compiling a sparc64 kernel? Message-ID: <14b5819239.1923914b58@smi.sun.com>
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> Hmmm, I must have overlooked something. Can you please decode the
> tpc addresses (using gdb from the s64-toolchain archive or nm)?
> If they are not making sense, please comment out all instructions that
> modify %tl in exception.s and look at the addresses again (this will
> break things later on, but for early crashes it makes debugging a lot
> easier because the original trap registers are preserved).
Sorry, the results I showed before were the result of an error on my
part in applying your patch. Now that I (hopefully) have it applied
right to a cvs tree from 12/24, I get:
sparc64_init: mdp=0xc01ba000 kmdp=0xc01ba000 boothowto=0
envp=0xc01b8000 end=0x0
stray interrupt 2033
Copyright (c) 1992-2001 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992,
1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD 5.0-CURRENT #1: Mon Dec 31 02:29:25 GMT 2001
woodjr@buddy:/usr/src/sys_12_24_2001/sparc64/compile/sparc64
Preloaded elf kernel "/kernel" at 0xc01ba000.
Timecounter "tick" frequency 166987562 Hz
CPU: unknown; please e-mail the following value together
with the exact name of your processor to
<freebsd-sparc@FreeBSD.org>.
version register: <0x22001040000507>
nexus0: <OpenFirmware Nexus device>
nexus0: <counter-timer>, type (unknown) (no driver attached)
nexus0: <sbus>, type sbus (no driver attached)
rn_init: radix functions require max_keylen be set
Mounting root from ufs:/dev/md0c
Root mount failed: 22
Manual root filesystem specification:
<fstype>:<device> Mount <device> using filesystem <fstype>
eg. ufs:da0a
? List valid disk boot devices
<empty line> Abort manual input
mountroot>
RED State Exception
TL=0000.0000.0000.0005 TT=0000.0000.0000.0080
TPC=0000.0000.c002.4d5c TnPC=0000.0000.c002.4d60
TSTATE=0000.0099.5800.1501
TL=0000.0000.0000.0004 TT=0000.0000.0000.0068
TPC=0000.0000.c002.8798 TnPC=0000.0000.c002.879c
TSTATE=0000.0044.5800.1501
TL=0000.0000.0000.0003 TT=0000.0000.0000.0010
TPC=0000.0000.c002.49c0 TnPC=0000.0000.c002.49c4
TSTATE=0000.0044.5800.1500
TL=0000.0000.0000.0002 TT=0000.0000.0000.004e
TPC=0000.0000.c002.87c0 TnPC=0000.0000.c002.87c4
TSTATE=0000.0044.5800.1600
TL=0000.0000.0000.0001 TT=0000.0000.0000.004e
TPC=0000.0000.c00d.7138 TnPC=0000.0000.c00d.713c
TSTATE=0000.0000.0000.1603
So I do get through to the mountroot and see a "Stray interrupt 2033"
message. But the RED state exception happens a second or two after
getting to the mountroot (even with no input from me).
If it helps, I tried to decode the TPC's in that trace and get:
(gdb) x/a 0xc0024d5c
0xc0024d5c <tl1_dmmu_miss+92>: 0x9de3bf409c23a018
(gdb) x/a 0xc0028798
0xc0028798 <tl1_trap+8>: 0xe073a957a3500000
(gdb) x/a 0xc00249c0
0xc00249c0 <tl1_intr_level+416>: 0x9de3bf4095520000
(gdb) x/a 0xc00287c0
0xc00287c0 <tl1_trap+48>: 0xd073a95fd273a96f
(gdb) x/a 0xc00d7138
0xc00d7138 <bzero+104>: 0xc0722018106ffff9
--Jamey
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