Subject: Re: Extended Addressing Mode

From: Matt Sealey <[email-masked]>
Date: Wed, 22 Oct 2008 09:19:49 -0500

Kumar Gala wrote:
> 
> On Oct 22, 2008, at 8:42 AM, Matt Sealey wrote:
>> So to confirm, XAEN support through Becky's patches does support the 
>> MPC8641D/e600 cores?
> 
> Yes, its the only part that has XAEN.

Okay I saw a lot of e500/BookE support go past but nothing 
specific :)

>> NOT supported because of the way the LAWs work, and also the alignment 
>> of the LAWs means it is not fine enough granularity to map between 2GB 
>> and 4GB into a window (you can have 2GB or 4GB but not some more 
>> arbitrary value?)
> 
> You can overlap LAWs because they have priority encoding.  The lower the 
> LAW # the higher the priority.

Hmm :)

> Your bigger issue is if you can setup the DDR controller for the hole 
> you want.

Hmmmmm :)

Okay good to know. I'll go back to reading the docs.

-- 
Matt Sealey <[email-masked]>
Genesi, Manager, Developer Relations