From: Segher Boessenkool <segher@koffie•nl>
To: Joakim Tjernlund <joakim.tjernlund@lumentis•se>
Cc: "'Paul Mackerras'" <paulus@samba•org>,
linuxppc-embedded@lists•linuxppc.org
Subject: Re: SV: SV: New invalidate/clean/flush_dcache functions
Date: Sat, 28 Dec 2002 05:01:46 +0100 [thread overview]
Message-ID: <3E0D222A.FE02C4CD@koffie.nl> (raw)
In-Reply-To: 000001c2ade5$5baaa020$94b9143e@hempc
Joakim Tjernlund wrote:
>
> In my typical example I need to invalidate a buffer before I give it to
> the
> CPM to be used as a receive buffer. Once given to the CPM there must be
> no more writes to that buffer memory. When the CPM has received data
> and written the data into the buffer and hands it over to the CPU
> (usally via an interrupt) the next read from the CPU must access it from
> the memory. Does the above require a sync?
Probably not, I don't know much about the CPM though (and I assume this
is a system without any extra cpu's).
> Does it take some time before a invalidate is completed?
Depends on your cpu; I don't know the details for your cpu. Check your
manuals :)
Segher
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2002-12-28 4:01 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-20 16:21 E1/T1 on mpc8260 Omanakuttan
2002-12-20 17:46 ` New invalidate/clean/flush_dcache functions Joakim Tjernlund
2002-12-21 14:25 ` Joakim Tjernlund
2002-12-22 7:00 ` Paul Mackerras
2002-12-23 13:19 ` SV: " Joakim Tjernlund
2002-12-26 4:12 ` Paul Mackerras
2002-12-26 13:52 ` SV: " Joakim Tjernlund
2004-04-26 16:41 ` High resolution timer in driver bhupinder sahran
2004-04-26 18:06 ` Wolfgang Denk
2004-04-27 15:52 ` bhupinder sahran
2002-12-27 0:58 ` SV: New invalidate/clean/flush_dcache functions Segher Boessenkool
2002-12-27 20:20 ` SV: " Joakim Tjernlund
2002-12-28 4:01 ` Segher Boessenkool [this message]
2002-12-23 20:26 ` Dan Malek
2002-12-24 10:36 ` SV: " Joakim Tjernlund
2002-12-24 17:53 ` Dan Malek
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