From: Antonino Daplas <adaplas@pol.net>
To: Jon Smirl <jonsmirl@yahoo.com>
Cc: James Simmons <jsimmons@infradead.org>,
Linux Fbdev development list
<linux-fbdev-devel@lists.sourceforge.net>
Subject: Re: Reading the EDID block for x86 machines
Date: 13 Mar 2003 01:38:40 +0800 [thread overview]
Message-ID: <1047490650.1030.31.camel@localhost.localdomain> (raw)
In-Reply-To: <20030311234249.40244.qmail@web14914.mail.yahoo.com>
On Wed, 2003-03-12 at 07:42, Jon Smirl wrote:
> --- Antonino Daplas <adaplas@pol.net> wrote:
> > Yikes! No, it can't be done this way. During the
> > early boot sequence,
> > the kernel is not yet decompressed and loaded, so
> > all the services the
> > kernel provides are still unavailable. Unless you
> > want to walk, detect,
> > enable, etc the PCI subsystem in pure 16-bit
> > assembly...
>
> You don't Linux to look at the PCI subsys you make
> calls into the system BIOS to find the devices.
That's not the only reason. The problem is in 16-bit mode, the code can
only access an address range up to only 1MB. PCI resources are located
above 16MB. So in order to copy the ROM, it might be necessary to
switch to 32-bit mode, copy the ROM, switch back to 16-bit mode, etc.
Unless I missed some imported BIOS calls or other methods to do this or
something similar in real-mode...
Tony
-------------------------------------------------------
This SF.net email is sponsored by:Crypto Challenge is now open!
Get cracking and register here for some mind boggling fun and
the chance of winning an Apple iPod:
http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0031en
next prev parent reply other threads:[~2003-03-12 17:41 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-11 12:49 Reading the EDID block for x86 machines Antonino Daplas
2003-03-11 15:49 ` James Simmons
2003-03-11 20:07 ` Antonino Daplas
2003-03-11 21:33 ` Antonino Daplas
2003-03-11 21:47 ` Antonino Daplas
2003-03-11 22:05 ` Jon Smirl
2003-03-11 22:33 ` Antonino Daplas
2003-03-11 22:54 ` Jon Smirl
2003-03-11 23:02 ` Antonino Daplas
2003-03-11 23:42 ` Jon Smirl
2003-03-12 17:38 ` Antonino Daplas [this message]
2003-03-12 18:16 ` Jon Smirl
2003-03-12 22:38 ` Antonino Daplas
2003-03-12 23:36 ` Jon Smirl
2003-03-12 23:47 ` Jon Smirl
2003-03-13 6:50 ` Geert Uytterhoeven
2003-03-13 15:42 ` Jon Smirl
2003-03-16 23:00 ` Antonino Daplas
2003-03-17 4:00 ` Jon Smirl
2003-03-17 7:00 ` Antonino Daplas
2003-03-17 19:33 ` Jon Smirl
2003-03-17 21:38 ` Antonino Daplas
2003-03-17 22:02 ` Jon Smirl
2003-03-17 22:29 ` Antonino Daplas
2003-03-17 23:41 ` Jon Smirl
2003-03-18 9:06 ` Geert Uytterhoeven
2003-03-18 10:00 ` Antonino Daplas
2003-03-18 17:07 ` Jon Smirl
2003-03-19 5:15 ` Antonino Daplas
2003-03-19 6:07 ` Jon Smirl
2003-03-18 0:00 ` Jon Smirl
2003-03-11 23:54 ` Jon Smirl
2003-03-12 12:10 ` Ville Syrjälä
2003-03-12 17:38 ` Antonino Daplas
2003-03-12 18:47 ` Ville Syrjälä
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=1047490650.1030.31.camel@localhost.localdomain \
--to=adaplas@pol.net \
--cc=jonsmirl@yahoo.com \
--cc=jsimmons@infradead.org \
--cc=linux-fbdev-devel@lists.sourceforge.net \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).