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Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override.

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From: Christer Weinigel <christer@...>
To: Rene Herman <rene.herman@...>
Cc: H. Peter Anvin <hpa@...>, Alan Cox <alan@...>, David P. Reed <dpreed@...>, Rene Herman <rene.herman@...>, Ingo Molnar <mingo@...>, Paul Rolland <rol@...>, Pavel Machek <pavel@...>, Thomas Gleixner <tglx@...>, <linux-kernel@...>, Ingo Molnar <mingo@...>, <rol@...>
Subject: Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override.
Date: Tuesday, January 1, 2008 - 8:55 pm

On Wed, 02 Jan 2008 00:11:54 +0100
Rene Herman <rene.herman@keyaccess.nl> wrote:


Both 0xed and 0xf0 are mapped to internal functions on the AMD Elan
SC400 processor.  It is an AMD 486 based system on a chip and since AMD
just knew that it would never have a math coprocessor, they reused the
0xf0-0xf2 range for the PCMCIA controller.  I guess the AMD Elan SC500
will have similar problems.

I seem to recall that back when I was working with the Elan SC400
(sometime around 1998?) there were discussions about finding an
alternate delay port because outb to 0x80 messed up the debug port.  I
think the Elan stopped those discussions because just about every port
on the Elan was reused for some alternate purpose.  

  /Christer
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Messages in current thread:
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., David P. Reed, (Tue Jan 1, 11:59 am)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Pavel Machek, (Tue Jan 1, 1:31 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., David P. Reed, (Tue Jan 1, 1:33 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Alan Cox, (Tue Jan 1, 12:15 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., H. Peter Anvin, (Tue Jan 1, 5:15 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Tue Jan 1, 5:35 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., H. Peter Anvin, (Tue Jan 1, 5:44 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Maciej W. Rozycki, (Wed Jan 9, 1:27 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., H. Peter Anvin, (Wed Jan 9, 2:18 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Tue Jan 1, 6:35 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., H. Peter Anvin, (Tue Jan 1, 6:39 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Tue Jan 1, 7:11 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Christer Weinigel, (Tue Jan 1, 8:55 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., H. Peter Anvin, (Tue Jan 1, 10:27 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Tue Jan 1, 9:00 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Tue Jan 1, 8:25 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., David P. Reed, (Tue Jan 1, 1:32 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Alan Cox, (Tue Jan 1, 1:38 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Ingo Molnar, (Tue Jan 1, 12:43 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Alan Cox, (Tue Jan 1, 1:32 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Ingo Molnar, (Tue Jan 1, 2:45 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Alan Cox, (Tue Jan 1, 5:07 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Ingo Molnar, (Wed Jan 2, 6:04 am)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Alan Cox, (Wed Jan 2, 9:47 am)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Wed Jan 2, 11:35 am)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Wed Jan 2, 11:50 am)
Re: [linux-kernel] Re: [PATCH] x86: provide a DMI based port..., David P. Reed, (Wed Jan 2, 9:11 am)
Re: [linux-kernel] Re: [PATCH] x86: provide a DMI based port..., Ingo Molnar, (Wed Jan 2, 9:21 am)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Christer Weinigel, (Tue Jan 1, 4:14 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Alan Cox, (Tue Jan 1, 5:13 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Christer Weinigel, (Tue Jan 1, 1:32 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Ingo Molnar, (Tue Jan 1, 2:46 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Christer Weinigel, (Tue Jan 1, 3:35 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., H. Peter Anvin, (Tue Jan 1, 5:21 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Ingo Molnar, (Wed Jan 2, 6:00 am)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Christer Weinigel, (Tue Jan 1, 7:05 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Alan Cox, (Tue Jan 1, 7:12 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Christer Weinigel, (Tue Jan 1, 8:23 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Ingo Molnar, (Tue Jan 1, 5:01 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Christer Weinigel, (Tue Jan 1, 5:42 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., H. Peter Anvin, (Tue Jan 1, 5:50 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Tue Jan 1, 5:42 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Alan Cox, (Tue Jan 1, 5:26 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Tue Jan 1, 3:59 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Christer Weinigel, (Tue Jan 1, 4:55 pm)
Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., H. Peter Anvin, (Tue Jan 1, 5:24 pm)