From: Dan Malek <dan@embeddededge.com>
To: Joakim Tjernlund <Joakim.Tjernlund@lumentis.se>
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: MPC860 reorder and invalidate dcache
Date: Sat, 17 Aug 2002 12:19:52 -0400 [thread overview]
Message-ID: <3D5E77A8.4050009@embeddededge.com> (raw)
In-Reply-To: 000f01c245f9$5429e440$0200a8c0@telia.com
Joakim Tjernlund wrote:
> ... The other mapping is used for flash commands and to write data to flash.
> Each time I read I do a invalidate_dcache_range() to pick up updates made from
> the uncached mapping.
Why don't you do a single invalidate after the write to cover the region
you just updated?
> I was just hoping that the 'sync' instruction was an "accident", but now I know
> better.
Those of us that have programmed PowerPC all of these years seldom include
a 'sync' instruction by accident. We are more likely to not use them and
then discover later they are necessary :-)
-- Dan
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2002-08-17 16:19 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-12 21:33 linuxppc_2_4_dev tree Cameron, Steve
2002-08-16 15:50 ` MPC860 reorder and invalidate dcache Joakim Tjernlund
2002-08-16 23:20 ` Dan Malek
2002-08-17 11:40 ` Joakim Tjernlund
2002-08-17 13:33 ` Dan Malek
2002-08-17 14:21 ` Joakim Tjernlund
2002-08-17 16:19 ` Dan Malek [this message]
2002-08-18 22:04 ` Joakim Tjernlund
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