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From: Kyle Evans <kevans@freebsd.org>
Date: Sun, 11 Oct 2020 11:05:40 -0500
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Subject: Re: RPi4B: modern firmware vs. Device tree loaded to 0x4000 (size
 0xbe0c) [fails] vs. to 0x1f0000 (size 0xbd90) [works]?
To: Robert Crowston <crowston@protonmail.com>
Cc: Klaus Cucinauomo <maciphone2@googlemail.com>,
 "gonzo@freebsd.org" <gonzo@freebsd.org>, Mark Millard <marklmi@yahoo.com>,
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On Sun, Oct 11, 2020 at 10:50 AM Robert Crowston
<crowston@protonmail.com> wrote:

> I guess my point is, either
> * we still keep the armstubs file (in some form) so we have a way to inject our CPU spin up logic in privileged mode; or,
> * we implement some alternative spin up (like Linux does).
>
> Just taking it out will not help us unless we turn off SMP.
>
> I am surprised that you can boot without the armstub. Can you post the dmesg?
>

mmel@ has mentioned that it may not be terribly hard to implement this
with spin tables instead. This would also let us undo a config
fragment in U-Boot, as we won't need to reserve any more than the
first page if we're following the standardish procedure.