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Date: Wed, 05 Feb 2014 12:23:14 -0500
From: Kurt Lidl <lidl@pix.net>
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To: freebsd-hackers@freebsd.org
Subject: Re: opteron a1100 arm
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On 2/5/14 3:01 AM, Poul-Henning Kamp wrote:
> In message <52F179C6.2050400@freebsd.org>, Nathan Whitehorn writes:
>
>> This AMD platform has UEFI and ACPI, so that's at least 2 out of 4...
>
> Ahh crap!
>

It's actually more than that.  The AMD64 platform has been called out
for a much greater deal of standardization than the multitude of
different options in the various existing ARM SoC boards.

The phrase you want to search for is:
	ARM Server Base System Architecture

Of course, the reference doc:
	http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.den0029/index.html

Is only available to registered ARM customers.

But, my understanding is that UEFI is the only boot option,
ACPI is the power management system, the USB2 controllers must
support EHCI 1.1, the USB3 controllers must support XHCI 1.0
and all SATA controllers must support AHCI 1.3.

They're attempting to drive the platform to a more standardized
set of components and boot methods (and hypervisor support) so
that if your software works on vendor A's SBSA board, it should
also work on vendor B's SBSA board.

-Kurt