From: Jeff Garzik <jgarzik@mandrakesoft.com>
To: hiren_mehta@agilent.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: accessing on-card ram/rom
Date: Wed, 08 Nov 2000 18:06:22 -0500 [thread overview]
Message-ID: <3A09DC6E.682CEC54@mandrakesoft.com> (raw)
In-Reply-To: <FEEBE78C8360D411ACFD00D0B74779718808E5@xsj02.sjs.agilent.com>
hiren_mehta@agilent.com wrote:
> I looked at the IO-mapping.txt file. It says that
> on x86 architecture it should not make any difference.
> It also says that "on x86 it _is_ the same memory space. So
> on x86 it actually works to just dereference a pointer".
> Any inputs on this ?
Don't depend on architecture-specific guarantees like this, it could
change, etc.
Use ioremap, it's portable, it's standard, it's the way to go. ;-)
Jeff
--
Jeff Garzik | "When I do this, my computer freezes."
Building 1024 | -user
MandrakeSoft | "Don't do that."
| -level 1
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/
next prev parent reply other threads:[~2000-11-08 23:07 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-11-08 22:57 accessing on-card ram/rom hiren_mehta
2000-11-08 23:06 ` Jeff Garzik [this message]
2000-11-09 19:27 ` Gérard Roudier
-- strict thread matches above, loose matches on Subject: below --
2000-11-08 22:48 MEHTA,HIREN (A-SanJose,ex1)
2000-11-08 22:53 ` Jeff Garzik
2000-11-09 13:03 ` Richard B. Johnson
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=3A09DC6E.682CEC54@mandrakesoft.com \
--to=jgarzik@mandrakesoft.com \
--cc=hiren_mehta@agilent.com \
--cc=linux-kernel@vger.kernel.org \
/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.