From: Gabriel Paubert <paubert@iram.es>
To: Segher Boessenkool <segher@kernel.crashing.org>
Cc: "linuxppc-dev@ozlabs.org" <linuxppc-dev@ozlabs.org>
Subject: Re: [PATCH 2/8] Add uli1575 pci-bridge sector to MPC8641HPCN dts file.
Date: Sun, 3 Jun 2007 09:53:41 +0200 [thread overview]
Message-ID: <20070603075341.GA2157@iram.es> (raw)
In-Reply-To: <438689f53c9fc6605b9091a54f112a37@kernel.crashing.org>
On Sun, Jun 03, 2007 at 09:42:55AM +0200, Segher Boessenkool wrote:
> >Maybe the 0x4d0/4d1 ports can be accessed with 16 bit
> >instructions, I don't know. What I know for sure is that
> >accessing port 0x20 with an inl/outl on some boards
> >locks immediately the system up (perhaps through infinite
> >retries).
>
> And inw/outw? There are only two bytes of registers
> there after all.
It does not lock up on the boards I've tested, but the results
are undefined (and perhaps implementation dependent). The problem
being that most accesses to the first register (command) change
the definition of which internal register is accessed with the
second byte.
Gabriel
next prev parent reply other threads:[~2007-06-03 7:53 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-01 17:48 [PATCH 2/8] Add uli1575 pci-bridge sector to MPC8641HPCN dts file Jon Loeliger
2007-06-01 18:58 ` Segher Boessenkool
2007-06-01 21:45 ` Wade Farnsworth
2007-06-02 8:22 ` Segher Boessenkool
2007-06-02 8:53 ` Gabriel Paubert
2007-06-02 9:01 ` Segher Boessenkool
2007-06-02 19:53 ` Gabriel Paubert
2007-06-02 20:23 ` Segher Boessenkool
2007-06-03 0:01 ` Benjamin Herrenschmidt
2007-06-03 7:41 ` Segher Boessenkool
2007-06-03 8:33 ` Gabriel Paubert
2007-06-03 8:57 ` Segher Boessenkool
2007-06-03 9:12 ` Benjamin Herrenschmidt
2007-06-03 10:02 ` Segher Boessenkool
2007-06-03 10:10 ` Gabriel Paubert
2007-06-03 11:42 ` Segher Boessenkool
2007-06-03 12:43 ` Gabriel Paubert
2007-06-03 14:42 ` Segher Boessenkool
2007-06-03 18:20 ` Gabriel Paubert
2007-06-03 18:56 ` Segher Boessenkool
2007-06-03 9:07 ` Benjamin Herrenschmidt
2007-06-03 9:59 ` Segher Boessenkool
2007-06-03 14:50 ` Jon Loeliger
2007-06-03 17:27 ` Segher Boessenkool
2007-06-04 20:27 ` Andy Fleming
2007-06-04 22:31 ` Randy Vinson
2007-06-05 19:16 ` Andy Fleming
2007-06-05 20:28 ` Randy Vinson
2007-06-06 7:09 ` Benjamin Herrenschmidt
2007-06-07 16:21 ` Andy Fleming
2007-06-07 16:53 ` Segher Boessenkool
2007-06-07 22:12 ` Benjamin Herrenschmidt
2007-06-08 8:29 ` Segher Boessenkool
2007-06-08 8:32 ` Benjamin Herrenschmidt
2007-06-05 6:05 ` Zang Roy-r61911
2007-06-02 23:52 ` Benjamin Herrenschmidt
2007-06-02 23:51 ` Benjamin Herrenschmidt
2007-06-03 8:59 ` Geert Uytterhoeven
2007-06-04 18:50 ` Jon Loeliger
2007-06-04 19:27 ` Segher Boessenkool
2007-06-01 23:28 ` Benjamin Herrenschmidt
2007-06-01 23:36 ` Jon Loeliger
2007-06-02 0:22 ` Benjamin Herrenschmidt
2007-06-02 8:28 ` Segher Boessenkool
2007-06-02 16:04 ` Jon Loeliger
2007-06-02 20:00 ` Segher Boessenkool
2007-06-02 23:16 ` Benjamin Herrenschmidt
2007-06-03 7:37 ` Segher Boessenkool
2007-06-04 0:16 ` Olof Johansson
2007-06-04 8:18 ` Segher Boessenkool
2007-06-02 8:25 ` Segher Boessenkool
2007-06-02 23:50 ` Benjamin Herrenschmidt
2007-06-03 0:13 ` Gabriel Paubert
2007-06-03 7:42 ` Segher Boessenkool
2007-06-03 7:53 ` Gabriel Paubert [this message]
2007-06-04 18:49 ` Jon Loeliger
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