From: Jeff Garzik <jgarzik@pobox.com>
To: Don Fry <brazilnut@us.ibm.com>
Cc: Mark Brown <broonie@sirena.org.uk>, netdev@oss.sgi.com
Subject: Re: Ethernet MAC address question
Date: Tue, 15 Jun 2004 12:11:18 -0400 [thread overview]
Message-ID: <40CF1FA6.3020701@pobox.com> (raw)
In-Reply-To: <200406151538.i5FFcJ720553@localhost.localdomain>
Don Fry wrote:
> So how does the driver distinguish between a valid, but incorrect MAC
> address, and the 'correct' MAC address? The incorrect one that is the
> value that just happened to be in the uninitialized volatile registers,
> and the correct address which some magic platform means loaded into the
> same, but this time initialized, volatile registers.
You have to notice that certain platform-specific attributes are
present, that tells your code to search in <this magic place> rather
than the standard place for MAC address.
For example, some Compaqs have a magic MAC address location (this might
even be pcnet32), and one solution proposed was looking for the
platform's DMI table identifiers. Another solution -- working -- was to
load the MAC address registers when the driver loads, and just hope it
is a correct address.
Jeff
prev parent reply other threads:[~2004-06-15 16:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-14 22:02 Ethernet MAC address question Don Fry
2004-06-14 23:34 ` Jeff Garzik
2004-06-15 4:17 ` Luis R. Rodriguez
2004-06-15 9:58 ` Mark Brown
2004-06-15 15:38 ` Don Fry
2004-06-15 16:11 ` Jeff Garzik [this message]
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=40CF1FA6.3020701@pobox.com \
--to=jgarzik@pobox.com \
--cc=brazilnut@us.ibm.com \
--cc=broonie@sirena.org.uk \
--cc=netdev@oss.sgi.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 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).