From: Dan Malek <dan@embeddededge.com>
To: Richard Williams <richard_williams@stratexnet.com>
Cc: Steven Scholz <steven.scholz@imc-berlin.de>,
LinuxPPC <linuxppc-embedded@lists.linuxppc.org>
Subject: Re: uncached user space mapping with mmap() ???
Date: Thu, 04 Mar 2004 18:17:27 -0500 [thread overview]
Message-ID: <4047B907.5070902@embeddededge.com> (raw)
In-Reply-To: A3240F62EF3C2749B1A25D3BC9548F4103EED2@ExchWENZ02.wenz.global.vpn
Richard Williams wrote:
> I just tried this using pread....
No, no.
Open /dev/mem and use mmap() to map your physical address:
mmap(NULL, <page_size_bytes>, (PROT_READ|PROT_WRITE), MAP_SHARED, mem_fd, phys_addr);
Then, use the pointer returned from mmap() as the base of your
registers.
-- Dan
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2004-03-04 23:17 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-04 23:02 uncached user space mapping with mmap() ??? Richard Williams
2004-03-04 23:17 ` Dan Malek [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-03-09 12:49 Fillod Stephane
2004-03-12 12:07 ` Jon Masters
2004-03-08 10:25 Fillod Stephane
2004-03-09 10:55 ` Jon Masters
2004-03-04 14:47 Fillod Stephane
2004-03-04 14:51 ` Steven Scholz
2004-03-04 14:15 Fillod Stephane
2004-03-04 14:35 ` Steven Scholz
2004-03-04 17:28 ` Eugene Surovegin
2004-03-04 13:51 Steven Scholz
2004-03-04 17:00 ` Dan Malek
2004-03-05 8:18 ` Steven Scholz
2004-03-05 11:35 ` Jon Masters
2004-03-05 11:41 ` Steven Scholz
2004-03-05 13:21 ` Jon Masters
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=4047B907.5070902@embeddededge.com \
--to=dan@embeddededge.com \
--cc=linuxppc-embedded@lists.linuxppc.org \
--cc=richard_williams@stratexnet.com \
--cc=steven.scholz@imc-berlin.de \
/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).