From: annamaya <annamaya@yahoo.com>
To: Eugene Surovegin <ebs@ebshome.net>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: Additional data/instruction BATs not initialized for MPC8280?
Date: Tue, 25 Jan 2005 11:40:07 -0800 (PST) [thread overview]
Message-ID: <20050125194008.68818.qmail@web53809.mail.yahoo.com> (raw)
In-Reply-To: <20050125191047.GA3818@gate.ebshome.net>
Doh! So that's how we get away with it.
--- Eugene Surovegin <ebs@ebshome.net> wrote:
> On Tue, Jan 25, 2005 at 09:49:13AM -0800, annamaya
> wrote:
> > I have read in the specs for the MPC8280 that it
> has a
> > G2_LE core which has 4 additional data and
> instruction
> > BATs. However, I dont see these BATS being cleared
> > early in the kernel. I only see that the first 4
> pairs
> > are cleared using the mtspr instructions. But my
> > kernel comes up just fine and everything seems to
> work
> > OK. Dont we need to clear the other set of
> I/DBATS?
> > What happens when we dont do this? Thanks in
> advance.
>
> Additional BATs in G2_LE core must be explicitly
> enabled in HID2 (HBE
> bit), until then they "don't exist" :).
>
> --
> Eugene
>
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prev parent reply other threads:[~2005-01-25 19:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-25 17:49 Additional data/instruction BATs not initialized for MPC8280? annamaya
2005-01-25 19:10 ` Eugene Surovegin
2005-01-25 19:40 ` annamaya [this message]
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