From owner-freebsd-sparc  Sat Dec 29 17:42:26 2001
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Date: Sun, 30 Dec 2001 02:42:35 +0100
From: Thomas Moestl <tmoestl@gmx.net>
To: Jamey Wood <Jamey.Wood@Sun.COM>
Cc: freebsd-sparc@freebsd.org
Subject: Re: compiling a sparc64 kernel?
Message-ID: <20011230024235.A461@crow.dom2ip.de>
References: <1710517c0b.17c0b17105@smi.sun.com>
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In-Reply-To: <1710517c0b.17c0b17105@smi.sun.com>; from Jamey.Wood@Sun.COM on Sat, Dec 29, 2001 at 12:04:28PM -0800
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On Sat, 2001/12/29 at 12:04:28 -0800, Jamey Wood wrote:
> > > Setting pil to 14 does get me all the way to a mountroot prompt:
> > 
> > Ok, cool.  This is a stopgap at best, I mostly wanted to see what
> > was going on.  Thomas would like you to try the patch he posted
> > as well, which may print a stray interrupt message.  Revert the
> > above change first.
> 
> With just Thomas's patch (and _not_ setting pil to 14), I get:
> 
>   Booting [/kernel]...
>   calling autoload
>   nothing to autoload yet.
>   post autoload
>   jumping to kernel entry at 0xc0028000.
>   sparc64_init: mdp=0xc01ba000 kmdp=0xc01ba000 boothowto=0
>     envp=0xc01b8000 end=0x0
>   Copyri
>   RED State Exception
> 
>   TL=0000.0000.0000.0005 TT=0000.0000.0000.0080
>   TPC=0000.0000.c002.4200 TnPC=0000.0000.c002.4204
>   TSTATE=0000.0000.5000.1507
>   TL=0000.0000.0000.0004 TT=0000.0000.0000.0010
>   TPC=0000.0000.c002.4d18 TnPC=0000.0000.c002.4d1c
>   TSTATE=0000.0000.5004.1407
>   TL=0000.0000.0000.0003 TT=0000.0000.0000.0068
>   TPC=0000.0000.c002.8798 TnPC=0000.0000.c002.879c
>   TSTATE=0000.0000.5000.1507
>   TL=0000.0000.0000.0002 TT=0000.0000.0000.0010
>   TPC=0000.0000.c00d.80c0 TnPC=0000.0000.c00d.80c4 
>   TSTATE=0000.0000.5000.1606
>   TL=0000.0000.0000.0001 TT=0000.0000.0000.004e
>   TPC=0000.0000.c00d.7bb4 TnPC=0000.0000.c00d.7bb8 
>   TSTATE=0000.00a5.0000.1605

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).

Thanks,
	- thomas

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