usb-only rpi 3b+ (+UART foo)

[John Kennedy]

On Mon, Aug 06, 2018 at 04:46:03PM +0200, Per olof Ljungmark wrote:
> Did you try FreeBSD 12.0-CURRENT #0 r336479: Thu Jul 19 14:52:02 UTC 2018 ?
> 
> Neither my rpi3b or rpi3b+ will boot images made after that rev.

Booting off of SD-card, I've used both 20180719-r336479 and 20180726-r336739
(from the RPI3 FreeBSD 12.0-CURRENT Development Snapshots).

In addition, I'm pretty sure that I've booted off of USB via a USB memory card
reader with the SD-card put in it, but I'll have to test that again.  I haven't
had a reason to try 20180802-r337160 yet.

As for you:  No booting at all?  IE, rainbow screen -> u-boot, kernel + modules
load, no kernel boot, or all the way into proper root-fs-mounted success?

I've been a bit leery about messing with u-boot if I don't have to, since that
has clearly burned some people.  So yay, pretty stock there.

For running my own compiled kernels, I've landed on these successfully:

	r336739, r336795, r336962, and r337273

Stable enough to compile the next kernel.