FreeBSD on Pine64: ubldr for arm64

[Felix Maurer]

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Hi,

I am currently trying to build a FreeBSD image with Crochet to boot on
the Pine64.

Thanks to the sysutils/u-boot-pine64 port I already got a working SPL
that starts U-Boot. The normal way to continue booting a image built by
Crochet is to start ubldr. But at the moment there is no arm64 version
of ubldr in the tree.
The only thing I found about this is this diff:
https://reviews.freebsd.org/D5512 . It has been lying around there since
March and the last comments state that the changes are unnecessary now
for the RPI3 because a way has been found to boot on a RPI3 without
U-Boot. Now I have two questions:

1. Is there a chance for the diff to make it into the tree? Although it
is no longer needed for the RPI3 it may be needed by other boards.
2. As an alternative: What is this mysterious way to boot without U-Boot
and may this be possible for other boards like the Pine64?

Regards,
Felix
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