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Date: Tue, 25 Jan 2005 11:10:47 -0800
From: Eugene Surovegin <ebs@ebshome.net>
To: annamaya <annamaya@yahoo.com>
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Cc: linuxppc-embedded@ozlabs.org
Subject: Re: Additional data/instruction BATs not initialized for MPC8280?
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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