From: Dan Malek <dan@embeddededge.com>
To: Stephan Linke <Stephan.Linke@epygi.de>
Cc: Linuxppc-Embedded <linuxppc-embedded@lists.linuxppc.org>
Subject: Re: question on howto use invalidate_dcache_range
Date: Thu, 13 Mar 2003 11:27:42 -0500 [thread overview]
Message-ID: <3E70B17E.9090507@embeddededge.com> (raw)
In-Reply-To: FCEAKDJJAPHPLJFINDAJCELACOAA.Stephan.Linke@epygi.de
Stephan Linke wrote:
> After all is it realy neccessary to use invalidate_dcache range before giving the transmit buffer to the DMA?
The logically correct cache operation is to invalidate an incoming buffer
after the DMA has completed, and to (obviously) push an outgoing buffer
prior to starting the DMA.
-- Dan
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2003-03-13 16:27 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-12 11:20 question on howto use invalidate_dcache_range Stephan Linke
2003-03-13 7:40 ` Joakim Tjernlund
2003-03-13 11:00 ` Stephan Linke
2003-03-13 13:24 ` Joakim Tjernlund
2003-03-13 15:04 ` Stephan Linke
2003-03-13 16:27 ` Dan Malek [this message]
2003-03-13 17:54 ` Joakim Tjernlund
2003-03-13 18:06 ` Dan Malek
2003-03-13 18:19 ` Roland Dreier
2003-03-13 18:39 ` Dan Malek
2003-03-13 19:09 ` Roland Dreier
2003-03-13 21:54 ` Joakim Tjernlund
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