From mboxrd@z Thu Jan  1 00:00:00 1970
From: Danny Gale <Daniel.Gale@coloradoengineeringinc.com>
Date: Thu, 23 Jan 2014 11:13:01 -0700
Subject: [U-Boot] T4QDS e6500 core and U-Boot 64-bit
In-Reply-To: <20140122090644.33C0138220A@gemini.denx.de>
References: <52DF18B3.1080904@coloradoengineeringinc.com>
	<20140122090644.33C0138220A@gemini.denx.de>
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To: u-boot@lists.denx.de

Hi Wolfgang,

Thanks for your reply. My responses are inline below.

On 1/22/2014 2:06 AM, Wolfgang Denk wrote:
> Dear Danny Gale,
>
> In message <52DF18B3.1080904@coloradoengineeringinc.com> you wrote:
>> The T4240 on the T4QDS board is a PPC e6500 core (64 bit), but it is
>> configured in U-Boot as an e500 core, which is 32 bit. Why is this?
> Becuase it simply works :-)
>
>> Can it be updated to e6500?
> Yes - if you add support for 64 bit configurations in general, and
> for powerpc64 in particular.
I don't even have a sense for what would be involved here. How 
fundamentally would the U-Boot code need to change?
>> This leads directly into another question: can U-Boot be compiled and
>> run 64-bit? So far, I have been unable to make it work with a 64-bit
>> compiler. I'm running into these errors:
> Not out of the box.
>
>
> What is your actual reason for wanting to run a 64 bit boot loader?
My reason for wanting to run 64-bit is that this system has 12 GB of 
RAM. Will 32-bit U-Boot be able to access and test more than 4 GB of RAM?

Thanks again,
Danny