From: Ralf Baechle <ralf@oss.sgi.com>
To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>,
Wayne Gowcher <wgowcher@yahoo.com>,
Linux-MIPS <linux-mips@oss.sgi.com>
Subject: Re: Equivalent of ioperm / iopl in linux mips ?
Date: Mon, 22 Apr 2002 10:44:17 -0700 [thread overview]
Message-ID: <20020422104417.B10146@dea.linux-mips.net> (raw)
In-Reply-To: <Pine.GSO.3.96.1020422170125.7706H-100000@delta.ds2.pg.gda.pl>; from macro@ds2.pg.gda.pl on Mon, Apr 22, 2002 at 05:30:08PM +0200
On Mon, Apr 22, 2002 at 05:30:08PM +0200, Maciej W. Rozycki wrote:
> Well, for Alpha ioperm/iopl functions check the system type in
> /proc/cpuinfo (we seem to have enough information there as well) and
> failing this they check a result of readlink of /etc/alpha_systype. Then
> an appropriate region of /dev/mem is mmapped with per-page permissions set
> up as requested if ioperm is used (with a worse granularity, though) and
> subsequent in/out function invocations access the area as appropriate.
> See sysdeps/unix/sysv/linux/alpha/ioperm.c in glibc for details -- it's a
> pretty clever solution with good performance and only a few trade-offs.
Thanks for volunteering ;)
Ralf
next prev parent reply other threads:[~2002-04-22 17:43 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-21 1:36 set_io_port_base()? Matthew Dharm
2002-02-21 1:57 ` set_io_port_base()? Ralf Baechle
2002-02-21 2:05 ` set_io_port_base()? Matthew Dharm
2002-02-21 2:13 ` set_io_port_base()? Ralf Baechle
2002-02-21 2:27 ` set_io_port_base()? Jun Sun
2002-02-21 2:48 ` set_io_port_base()? Matthew Dharm
2002-02-21 2:48 ` set_io_port_base()? Matthew Dharm
2002-02-21 3:03 ` set_io_port_base()? Jason Gunthorpe
2002-02-21 5:35 ` set_io_port_base()? Jun Sun
2002-02-21 3:30 ` set_io_port_base()? Ralf Baechle
2002-02-21 16:34 ` pthread support in mipsel-linux Wayne Gowcher
2002-02-21 17:55 ` H . J . Lu
2002-02-21 18:12 ` Wayne Gowcher
2002-02-21 18:25 ` H . J . Lu
2002-02-21 18:45 ` Wayne Gowcher
2002-02-22 8:52 ` Florian Lohoff
2002-02-22 13:38 ` Maciej W. Rozycki
2002-02-22 13:45 ` Hiroyuki Machida
2002-02-22 14:28 ` Maciej W. Rozycki
2002-02-22 16:53 ` H . J . Lu
2002-02-22 16:57 ` H . J . Lu
2002-02-22 17:06 ` Maciej W. Rozycki
2002-02-22 17:14 ` H . J . Lu
2002-04-19 17:06 ` Equivalent of ioperm / iopl in linux mips ? Wayne Gowcher
2002-04-20 9:03 ` Geert Uytterhoeven
2002-04-22 11:35 ` Maciej W. Rozycki
2002-04-22 14:55 ` Geert Uytterhoeven
2002-04-22 15:30 ` Maciej W. Rozycki
2002-04-22 15:33 ` Geert Uytterhoeven
2002-04-22 17:44 ` Ralf Baechle [this message]
2002-04-22 18:01 ` Maciej W. Rozycki
2002-02-21 2:08 ` set_io_port_base()? Matthew Dharm
2002-02-21 2:16 ` set_io_port_base()? Ralf Baechle
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20020422104417.B10146@dea.linux-mips.net \
--to=ralf@oss.sgi.com \
--cc=geert@linux-m68k.org \
--cc=linux-mips@oss.sgi.com \
--cc=macro@ds2.pg.gda.pl \
--cc=wgowcher@yahoo.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.