From owner-freebsd-hackers@FreeBSD.ORG  Tue May 15 08:00:56 2012
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Date: Tue, 15 May 2012 10:00:44 +0200 (CEST)
From: Michael Reifenberger <mike@reifenberger.com>
To: Eric McCorkle <eric@shadowsun.net>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: GSoC Project: EFI on amd64/i386
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On Mon, 14 May 2012, Eric McCorkle wrote:
...
> If I understand things correctly, boot2 handles the switch to
> protected mode (as well as enabling A20), both loader(8) and the
> kernel begin their execution in a protected mode environment.  Can I
> get an absolute confirmation on this?  Obviously if this is not the
> case, then there will need to be another (protected mode) entry point
> into the kernel.
>

No.
*boot* and *loader should be the same on X32 and AMD64.
The kernel seems to switch to long mode in /sys/amd64/amd64/mpboot.S

Bye/2
---
Michael Reifenberger
Michael@Reifenberger.com
http://www.Reifenberger.com