From: Sergio Ruiz <quekio@gmail.com>
To: linux-mips@linux-mips.org
Subject: How to the the physical addresses under linux (au1500)
Date: Tue, 3 May 2005 21:56:26 +0200 [thread overview]
Message-ID: <e02bc66105050312564d0dacdb@mail.gmail.com> (raw)
I am trying to program the DMA (with the ac97) in assembler using a
linux kernel module for mips teaching purposes.
The problem is that I need to get the physical address of the pointer
to the buffer to transfer to the AC97.
Looking at the kernel source code, I found that I can get the physical
address subtracting 0x8000000, but It doesnt seem to work.
Any idea?
Thanks,
Sergio
next reply other threads:[~2005-05-03 19:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-03 19:56 Sergio Ruiz [this message]
2005-05-03 20:09 ` How to the the physical addresses under linux (au1500) Dan Malek
-- strict thread matches above, loose matches on Subject: below --
2005-05-03 21:04 Sergio Ruiz
2005-05-03 21:49 ` Wolfgang Denk
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=e02bc66105050312564d0dacdb@mail.gmail.com \
--to=quekio@gmail.com \
--cc=linux-mips@linux-mips.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox