From: Andrew Dyer <adyer@righthandtech.com>
To: Ralf Baechle <ralf@linux-mips.org>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>,
Marco Braga <marco.braga@gmail.com>,
Domen Puncer <domen.puncer@telargo.com>,
linux-mips@linux-mips.org
Subject: Re: Trouble with sound/mips/au1x00.c AC97 driver
Date: Mon, 12 Mar 2007 20:00:58 -0500 [thread overview]
Message-ID: <45F5F7CA.3000503@righthandtech.com> (raw)
In-Reply-To: <20070313004315.GA26119@linux-mips.org>
Ralf Baechle wrote:
> For the general MIPS case (Alchemy may provide guarantees I don't know of)
> a SYNC instruction is not sufficient to ensure that a write has actually
> been reached by the device. It may just like on PCI take a read from the
> same device again:
I just looked it up.
Section 2.4.5 of the Alchemy Au1550 datasheet says that a SYNC is
guaranteed to commit the write buffer to memory.
Whoever is looking at this should also pay attention to the CCA bits in
the TLB mapping the registers (Section 2.3.6 of the manual) or the fixed
regions (depending on the VA used) to make sure that merging and
gathering are turned off.
--
Andrew Dyer <adyer@righthandtech.com>
Sr. Engineer
RightHand Technologies, Inc.
6545 N. Olmsted Ave.
Chicago, IL 60631
(773) 774-7600 x111
next prev parent reply other threads:[~2007-03-13 1:02 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-07 10:49 Trouble with sound/mips/au1x00.c AC97 driver Freddy Spierenburg
2007-03-09 7:22 ` Marco Braga
2007-03-09 10:33 ` Freddy Spierenburg
2007-03-10 13:20 ` Marco Braga
[not found] ` <45F350E9.3020208@cooper-street.com>
[not found] ` <d459bb380703120157wb3dde00p4c232e300e82fd3d@mail.gmail.com>
2007-03-12 9:59 ` Marco Braga
2007-03-12 10:39 ` Domen Puncer
2007-03-12 13:09 ` Marco Braga
2007-03-12 15:35 ` Sergei Shtylyov
2007-03-13 0:43 ` Ralf Baechle
2007-03-13 1:00 ` Andrew Dyer [this message]
2007-03-13 1:09 ` Ralf Baechle
2007-03-13 8:44 ` Marco Braga
[not found] ` <45F5DC73.9060004@cooper-street.com>
[not found] ` <d459bb380703130143w7c98e1cchdbdae6cb9a7ac7ce@mail.gmail.com>
[not found] ` <45F71FFD.202@cooper-street.com>
2007-03-13 23:12 ` Marco Braga
2007-03-15 8:04 ` Marco Braga
2007-04-16 14:47 ` Freddy Spierenburg
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=45F5F7CA.3000503@righthandtech.com \
--to=adyer@righthandtech.com \
--cc=domen.puncer@telargo.com \
--cc=linux-mips@linux-mips.org \
--cc=marco.braga@gmail.com \
--cc=ralf@linux-mips.org \
--cc=sshtylyov@ru.mvista.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 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.