From: Stuart Adams <sja@brightstareng.com>
To: ecos-discuss@cygnus.com
Subject: Re: Cache and MMU support for PowerPC
Date: Wed, 04 Nov 1998 14:35:00 -0000 [thread overview]
Message-ID: <3640AEAB.15DFD164@brightstareng.com> (raw)
In-Reply-To: <3640A0CC.1B964D74@microplex.com>
> I've gone through the on-line information but am still
> wondering if the PowerPC version of eCos includes
> support for the MPC860's cache and MMU. Can anyone
> save me from pouring through the code to determine if
> it does?
Not yet, here is the comment in hal_cache.h
// FIXME:
// The revision A.2 MPC860 might do all sorts of horrible things to
// the cache contents in a few specific (and unlikely)
// situations. However, as I don't feel like being bitten by these,
// leave caches disabled at all times.
Also, the MMU needs to be enabled for the cache's to work and I don't
see code for that. It's going to be board dependent anyway. Also, once
you enable the cache there are additional issues with dealing with
the CPM to do I/O.
-- Stuart
next prev parent reply other threads:[~1998-11-04 14:35 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-11-04 14:35 Fred Fierling
1998-11-04 14:35 ` Stuart Adams [this message]
1998-11-04 14:35 ` Fred Fierling
[not found] ` <3640AEAB.15DFD164.cygnus.sourceware.ecos.d@brightstareng.com>
1998-11-06 10:40 ` Jesper Skov
1998-11-06 10:40 ` Stuart Adams
1998-11-06 10:40 ` Fred Fierling
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