From: Dan Malek <dmalek@jlc.net>
To: "Guy G. Sotomayor, Jr." <ggs@shiresoft.com>
Cc: Cort Dougan <cort@persephone.cs.nmt.edu>,
Troy Benjegerdes <hozer@drgw.net>,
linuxppc-dev@lists.linuxppc.org
Subject: Re: PReP RTC vs Decrementer accuracy...
Date: Fri, 11 Dec 1998 00:53:25 -0500 [thread overview]
Message-ID: <3670B354.4AFACB80@jlc.net> (raw)
In-Reply-To: 36702079.69588EB4@shiresoft.com
Guy G. Sotomayor, Jr. wrote:
> Dan Malek wrote:
> > Excellent idea. I have started to implement this on an MPC8xx board,
> > so I will let everyone know the results pretty quickly.
> .....this is how we kept time since all of the processors we were
> dealing with had a time base or its moral equivalent.....
I have it running on an MPC8xx board right now, we'll
see how it keeps time overnight with some other programs
running. I couldn't point to any problems with the decrementer,
but I think my implementation of the TB prevents missing
any counts. One nice thing I discovered is the decrementer
is an exception rather than an interrupt, so you are unlikely
to mask it like you do with the TB interrupt.
I am working on a version right now that I will run on
my PowerBook G3 to see if I can actually make it run
on a 750 platform.
-- Dan
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next prev parent reply other threads:[~1998-12-11 5:53 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-12-07 12:31 USB, PCI and registers Benjamin Herrenschmidt
1998-12-07 21:02 ` PReP RTC vs Decrementer accuracy Troy Benjegerdes
1998-12-08 5:00 ` Cort Dougan
1998-12-08 20:32 ` Dan Malek
1998-12-08 23:52 ` Cort Dougan
1998-12-09 7:30 ` Troy Benjegerdes
1998-12-09 8:25 ` Cort Dougan
1998-12-09 23:52 ` Corey Minyard
1998-12-10 4:20 ` Corey Minyard
1998-12-10 5:48 ` Cort Dougan
1998-12-10 10:58 ` Geert Uytterhoeven
1998-12-10 16:00 ` Corey Minyard
1998-12-09 20:37 ` Dan Malek
1998-12-10 5:57 ` Guy G. Sotomayor, Jr.
1998-12-10 17:53 ` Dan Malek
1998-12-10 19:26 ` Guy G. Sotomayor, Jr.
1998-12-11 5:53 ` Dan Malek [this message]
1998-12-13 17:05 ` Gabriel Paubert
1998-12-14 6:45 ` Dan Malek
1998-12-15 20:12 ` Dan Malek
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