From: Oliver Korpilla <okorpil@fh-landshut.de>
To: Adrian Cox <adrian@humboldt.co.uk>
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: MPC7455 DMA buffer strangeness
Date: Tue, 06 Jul 2004 12:09:56 +0200 [thread overview]
Message-ID: <40EA7A74.1000408@fh-landshut.de> (raw)
In-Reply-To: <1089106451.937.85.camel@localhost>
Hello, Adrian!
When removing the line
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
from my mmap() hook, DMA works as expected.
So my problem just transformed to "Differentiate mapping for Master Windows
(uncached) from mapping for DMA (cache coherent)".
Many a lot of thanks,
Oliver Korpilla
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
prev parent reply other threads:[~2004-07-06 10:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-05 8:31 MPC7455 DMA buffer strangeness Oliver Korpilla
2004-07-06 8:34 ` Adrian Cox
2004-07-06 8:47 ` Oliver Korpilla
2004-07-06 9:34 ` Adrian Cox
2004-07-06 9:46 ` Oliver Korpilla
2004-07-06 10:09 ` Oliver Korpilla [this message]
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