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From: John Baldwin <jhb@FreeBSD.org>
To: Marc Olzheim <marcolz@stack.nl>
Date: Fri, 12 Nov 2004 13:52:58 -0500
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cc: Willem Jan Withagen <wjw@withagen.nl>
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Subject: Re: Booting questions ....
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On Friday 12 November 2004 04:27 am, Marc Olzheim wrote:
> On Wed, Nov 10, 2004 at 08:25:33AM -0500, John Baldwin wrote:
> > Note that amd64 uses PAE, so if you want an amd64 version that can do
> > more than 4 GB you will have to handle PAE.
>
> Erhm... You're talking about amd64 running in i386 mode perhaps. Why
> would amd64 in native 64-bit mode need PAE ?

PAE is how native 64-bit mode does paging.  Basically an extended PAE.  
Perhaps there's a kind of flat mode for 64-bit mode, but I don't think there 
is.  In the kernel we use a psuedo flat-mode by having a direct-mapped region 
ala the K0seg on Alpha.

-- 
John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org