From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Segher Boessenkool <segher@kernel.crashing.org>
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org,
Dave Liu <r63238@freescale.com>,
mingo@elte.hu, tglx@linutronix.de
Subject: Re: [PATCH 2.6.21-rt2] PowerPC: decrementer clockevent driver
Date: Sat, 19 May 2007 10:13:16 +1000 [thread overview]
Message-ID: <1179533596.32247.429.camel@localhost.localdomain> (raw)
In-Reply-To: <51b3a75638604c9dd7ed60a10f0ed934@kernel.crashing.org>
On Sat, 2007-05-19 at 01:49 +0200, Segher Boessenkool wrote:
> > I find it extremely silly to implement it as edge anyway. The EE line
> > is
> > level triggered, and having a mix of edge and level on the same
> > exception without a clean way to retrigger the DEC one other than
> > waiting one tick is just causing trouble.
>
> It isn't edge triggered, it just automatically clears the
> decrementer exception condition at its source when taken
Which is exactly the same thing software-wise as edge triggered...
Ben.
WARNING: multiple messages have this Message-ID (diff)
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Segher Boessenkool <segher@kernel.crashing.org>
Cc: linux-kernel@vger.kernel.org, mingo@elte.hu,
Dave Liu <r63238@freescale.com>,
Sergei Shtylyov <sshtylyov@ru.mvista.com>,
linuxppc-dev@ozlabs.org, tglx@linutronix.de
Subject: Re: [PATCH 2.6.21-rt2] PowerPC: decrementer clockevent driver
Date: Sat, 19 May 2007 10:13:16 +1000 [thread overview]
Message-ID: <1179533596.32247.429.camel@localhost.localdomain> (raw)
In-Reply-To: <51b3a75638604c9dd7ed60a10f0ed934@kernel.crashing.org>
On Sat, 2007-05-19 at 01:49 +0200, Segher Boessenkool wrote:
> > I find it extremely silly to implement it as edge anyway. The EE line
> > is
> > level triggered, and having a mix of edge and level on the same
> > exception without a clean way to retrigger the DEC one other than
> > waiting one tick is just causing trouble.
>
> It isn't edge triggered, it just automatically clears the
> decrementer exception condition at its source when taken
Which is exactly the same thing software-wise as edge triggered...
Ben.
next prev parent reply other threads:[~2007-05-19 0:14 UTC|newest]
Thread overview: 105+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-17 17:42 [PATCH 2.6.21-rt2] PowerPC: decrementer clockevent driver Sergei Shtylyov
2007-05-17 17:47 ` Kumar Gala
2007-05-17 17:47 ` Kumar Gala
2007-05-17 18:07 ` Sergei Shtylyov
2007-05-17 18:07 ` Sergei Shtylyov
2007-05-17 18:17 ` Kumar Gala
2007-05-17 18:17 ` Kumar Gala
2007-05-17 18:26 ` Sergei Shtylyov
2007-05-17 18:26 ` Sergei Shtylyov
2007-05-17 18:31 ` Kumar Gala
2007-05-17 18:31 ` Kumar Gala
2007-05-17 18:42 ` Sergei Shtylyov
2007-05-17 18:42 ` Sergei Shtylyov
2007-05-18 12:39 ` Matt Sealey
2007-05-18 12:39 ` Matt Sealey
2007-05-18 13:45 ` Sergei Shtylyov
2007-05-18 13:45 ` Sergei Shtylyov
2007-05-18 14:28 ` Matt Sealey
2007-05-18 14:28 ` Matt Sealey
2007-05-18 14:48 ` Thomas Gleixner
2007-05-18 14:48 ` Thomas Gleixner
2007-05-18 15:37 ` Matt Sealey
2007-05-18 15:37 ` Matt Sealey
2007-05-18 16:31 ` Kumar Gala
2007-05-18 16:31 ` Kumar Gala
2007-05-18 16:50 ` Thomas Gleixner
2007-05-18 16:50 ` Thomas Gleixner
2007-05-18 16:55 ` Matt Sealey
2007-05-18 16:55 ` Matt Sealey
2007-05-18 16:52 ` Matt Sealey
2007-05-18 16:52 ` Matt Sealey
2007-07-10 10:52 ` Gabriel Paubert
2007-07-10 10:52 ` Gabriel Paubert
2007-07-10 14:24 ` Segher Boessenkool
2007-07-10 14:24 ` Segher Boessenkool
2007-07-10 23:31 ` Paul Mackerras
2007-07-10 23:31 ` Paul Mackerras
2007-07-11 0:10 ` Segher Boessenkool
2007-07-11 0:10 ` Segher Boessenkool
2007-05-18 20:27 ` David Miller
2007-05-18 20:27 ` David Miller
2007-05-18 14:56 ` Daniel Walker
2007-05-18 14:56 ` Daniel Walker
2007-05-18 15:06 ` Sergei Shtylyov
2007-05-18 15:06 ` Sergei Shtylyov
2007-05-18 15:39 ` Daniel Walker
2007-05-18 15:39 ` Daniel Walker
2007-05-18 15:48 ` Sergei Shtylyov
2007-05-18 15:48 ` Sergei Shtylyov
2007-05-19 3:33 ` Paul Mackerras
2007-05-19 3:33 ` Paul Mackerras
2007-05-20 2:43 ` Daniel Walker
2007-05-20 2:43 ` Daniel Walker
2007-05-20 3:03 ` Benjamin Herrenschmidt
2007-05-20 3:03 ` Benjamin Herrenschmidt
2007-05-20 15:03 ` Matt Sealey
2007-05-20 15:03 ` Matt Sealey
2007-05-20 21:25 ` Benjamin Herrenschmidt
2007-05-20 21:25 ` Benjamin Herrenschmidt
2007-05-20 16:02 ` Segher Boessenkool
2007-05-20 16:02 ` Segher Boessenkool
2007-05-20 21:26 ` Benjamin Herrenschmidt
2007-05-20 21:26 ` Benjamin Herrenschmidt
2007-05-17 19:27 ` Segher Boessenkool
2007-05-17 19:27 ` Segher Boessenkool
2007-05-17 19:43 ` Sergei Shtylyov
2007-05-17 19:43 ` Sergei Shtylyov
2007-05-17 19:50 ` Segher Boessenkool
2007-05-17 19:50 ` Segher Boessenkool
2007-05-17 20:00 ` Sergei Shtylyov
2007-05-17 20:00 ` Sergei Shtylyov
2007-05-17 20:53 ` Segher Boessenkool
2007-05-17 20:53 ` Segher Boessenkool
2007-05-18 5:04 ` Benjamin Herrenschmidt
2007-05-18 5:04 ` Benjamin Herrenschmidt
2007-05-18 5:39 ` Dave Liu
2007-05-18 5:39 ` Dave Liu
2007-05-18 7:08 ` Benjamin Herrenschmidt
2007-05-18 7:08 ` Benjamin Herrenschmidt
2007-05-18 13:41 ` Sergei Shtylyov
2007-05-18 13:41 ` Sergei Shtylyov
2007-05-18 13:48 ` Sergei Shtylyov
2007-05-18 23:27 ` Benjamin Herrenschmidt
2007-05-18 23:27 ` Benjamin Herrenschmidt
2007-05-18 23:49 ` Segher Boessenkool
2007-05-18 23:49 ` Segher Boessenkool
2007-05-19 0:13 ` Benjamin Herrenschmidt [this message]
2007-05-19 0:13 ` Benjamin Herrenschmidt
2007-05-30 15:56 ` Milton Miller
2007-05-19 3:34 ` Paul Mackerras
2007-05-19 3:34 ` Paul Mackerras
2007-05-24 18:25 ` [PATCH 2.6.21-rt7] PowerPC: fix clockevents for classic CPUs Sergei Shtylyov
2007-05-24 19:10 ` Segher Boessenkool
2007-05-24 19:10 ` Segher Boessenkool
2007-10-18 14:45 ` [PATCH 2.6.21-rt2] PowerPC: decrementer clockevent driver Sergei Shtylyov
2007-10-18 14:45 ` Sergei Shtylyov
-- strict thread matches above, loose matches on Subject: below --
2007-05-18 3:24 Albert Cahalan
2007-05-18 14:52 ` Sergei Shtylyov
2007-05-18 14:52 ` Sergei Shtylyov
2007-05-19 1:45 ` Albert Cahalan
2007-05-19 1:45 ` Albert Cahalan
2007-05-19 12:28 ` Segher Boessenkool
2007-05-19 12:28 ` Segher Boessenkool
2007-05-19 18:22 ` Albert Cahalan
2007-05-19 18:22 ` Albert Cahalan
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