Re: Boot from USB on RPi4 8GB?

From: Mark Millard via freebsd-arm <>
Date: Sun, 30 May 2021 23:25:23 UTC

On 2021-May-30, at 10:59, William Carson via freebsd-arm <freebsd-arm at> wrote:

> T. . .
>>> If I dd Raspberry Pi OS (2021-05-07-raspios-buster-armhf-lite.img) to the same disk, it boots up no problem. I'm thinking this is a U-Boot/rpi-firmware problem, but I don't really know where to begin.
>> . . .

This does not involve a U-Boot at all --and also is an armv7 boot,
instead of an aarch64 boot. It may also be that this manages to
use less power on the SSD during booting than a
Firmware -> U-Boot -> FreeBSD-Loader -> FreeBSD-Kernel+World would.

RaspiOS and RaspiOS64 boot a kernel*.img directly from the firmware,
without using U-Boot. We already know that the firmware was working
to find, load, and start U-Boot. So this boot does not tell us much
new about the boot sequence that is used for FreeBSD (U-Boot and
later stages).

The issue seems to be tied to U-Boot's stage of activity based on
your reports of the notices output.

Mark Millard
marklmi at
( went
away in early 2018-Mar)