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Date: Tue, 25 Jan 2005 11:40:07 -0800 (PST)
From: annamaya <annamaya@yahoo.com>
To: Eugene Surovegin <ebs@ebshome.net>
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Cc: linuxppc-embedded@ozlabs.org
Subject: Re: Additional data/instruction BATs not initialized for MPC8280?
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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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