From: Richard Henderson <rth@twiddle.net>
To: Tristan Gingold <gingold@adacore.com>
Cc: QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH 3/6] target-alpha: Reduce internal processor registers for user-mode.
Date: Wed, 06 Jan 2010 08:29:42 -0800 [thread overview]
Message-ID: <4B44BA76.7060009@twiddle.net> (raw)
In-Reply-To: <8B1166FD-E0AE-4A6D-9CD3-53445F282069@adacore.com>
On 01/06/2010 01:55 AM, Tristan Gingold wrote:
>> The existing set of IPRs is totally irrelevant to user-mode emulation.
>> Indeed, they most are irrelevant to implementing kernel-mode emulation,
>> and would only be relevant to PAL-mode emulation, which I suspect that
>> no one will ever attempt.
>
> Interesting, that's the approach I used to emulate an es40 (ie full emulation of 21264).
> This had the advantage to be able to use the genuine ROM.
Heh. Well, far be it for me to disuade. There's surely room for
wanting to emulate at that level.
However, since (1) ROMs other than the few supported by MILO are
probably not redistributable and (2) I have the sense that generic
kernel stuff would go faster emulating the PALcode specification, I
think there's also a reason to do it that way too.
All that said, there's currently nothing that distinguishes between
anything but user-mode and system-mode.
I would be delighted to see your es40 patches...
r~
next prev parent reply other threads:[~2010-01-06 16:29 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20091228201020.GD5695@hall.aurel32.net>
2009-12-18 22:09 ` [Qemu-devel] [patch] target-alpha: squashed fpu qualifiers patch Richard Henderson
2010-01-04 22:46 ` [Qemu-devel] [PATCH 0/6] target-alpha: fpu qualifiers, round 2 Richard Henderson
2009-12-31 19:54 ` [Qemu-devel] [PATCH 1/6] target-alpha: Fix gdb access to fpcr and unique Richard Henderson
2009-12-31 20:41 ` [Qemu-devel] [PATCH 2/6] target-alpha: Split up FPCR value into separate fields Richard Henderson
2010-01-04 19:19 ` [Qemu-devel] [PATCH 3/6] target-alpha: Reduce internal processor registers for user-mode Richard Henderson
2010-01-06 9:55 ` Tristan Gingold
2010-01-06 16:29 ` Richard Henderson [this message]
2010-01-06 17:04 ` Andreas Färber
2010-01-07 11:54 ` Tristan Gingold
2010-01-07 20:13 ` Andreas Färber
2010-01-04 19:24 ` [Qemu-devel] [PATCH 4/6] target-alpha: Clean up arithmetic traps Richard Henderson
2010-01-04 19:25 ` [Qemu-devel] [PATCH 5/6] target-alpha: Mark helper_excp as NORETURN Richard Henderson
2010-01-04 22:27 ` [Qemu-devel] [PATCH 6/6] target-alpha: Implement IEEE FP qualifiers Richard Henderson
2010-01-26 16:35 ` [Qemu-devel] [PATCH 0/6] target-alpha: fpu qualifiers, round 2 Richard Henderson
2010-02-09 18:47 ` Richard Henderson
2010-02-23 22:58 ` Aurelien Jarno
2010-02-24 11:24 ` Richard Henderson
2010-02-28 16:49 ` Aurelien Jarno
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