From: miquels@cistron-office.nl (Miquel van Smoorenburg)
To: linux-kernel@vger.kernel.org
Subject: Re: Support for serial console on legacy free machines
Date: Tue, 31 Jul 2001 15:54:38 +0000 (UTC) [thread overview]
Message-ID: <9k6kbu$suo$4@ncc1701.cistron.net> (raw)
In-Reply-To: <200107302332.f6UNWbxg001791@webber.adilger.int> <3B65F1A2.30708CC1@fc.hp.com> <000701c119cd$ebf0c720$294b82ce@connecttech.com>
In article <000701c119cd$ebf0c720$294b82ce@connecttech.com>,
Stuart MacDonald <stuartm@connecttech.com> wrote:
>C) serial.c contains a completely separate serial console driver,
>complete with its own init routine. Which meshes with the current
>suggestion that the "serial driver" isn't used, and pci init happens
>too late.
That's because you expect printk() to work even if interrupts
don't (yet), so there's a mini driver in there that works in polled
mode and is completely anatomous (sp?).
Also, the `real' serial driver only works when /dev/ttySx is opened by
a process - it needs a lot of context (file handles etc) that is
dependent on stuff that is only available after the system has booted.
Mike.
--
"dselect has a user interface which scares small children"
-- Theodore Tso, on debian-devel
next prev parent reply other threads:[~2001-07-31 15:54 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-30 21:26 Support for serial console on legacy free machines Andreas Dilger
2001-07-30 21:38 ` Khalid Aziz
2001-07-30 22:40 ` Andreas Dilger
2001-07-30 22:53 ` Jan-Benedict Glaw
2001-07-30 22:53 ` Maciej W. Rozycki
2001-07-30 23:00 ` Khalid Aziz
2001-07-30 23:17 ` Randy.Dunlap
2001-07-30 23:39 ` Khalid Aziz
2001-07-30 23:52 ` Randy.Dunlap
2001-07-30 23:32 ` Andreas Dilger
2001-07-30 23:40 ` Ignacio Vazquez-Abrams
2001-07-30 23:45 ` Khalid Aziz
2001-07-31 14:34 ` Stuart MacDonald
2001-07-31 15:54 ` Miquel van Smoorenburg [this message]
2001-07-31 16:00 ` Eric W. Biederman
2001-07-31 16:10 ` Khalid Aziz
2001-07-31 16:39 ` Andreas Dilger
2001-07-31 18:43 ` Russell King
2001-08-01 2:01 ` Keith Owens
2001-07-31 16:42 ` Russell King
2001-07-31 17:14 ` Stuart MacDonald
2001-07-31 18:46 ` Russell King
2001-08-01 3:21 ` Eric W. Biederman
2001-08-01 3:39 ` Ignacio Vazquez-Abrams
2001-07-31 1:33 ` Keith Owens
2001-07-31 4:50 ` Johannes Erdfelt
2001-07-31 16:15 ` Khalid Aziz
2001-07-29 20:47 ` Alan Cox
2001-07-31 16:20 ` Randy.Dunlap
[not found] <no.id>
2001-07-26 22:20 ` Alan Cox
2001-07-30 17:47 ` Khalid Aziz
-- strict thread matches above, loose matches on Subject: below --
2001-07-26 21:13 Khalid Aziz
2001-07-27 13:28 ` Simon Richter
2001-07-30 17:49 ` Khalid Aziz
2001-07-30 18:21 ` Rik van Riel
2001-07-30 19:39 ` Khalid Aziz
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