Booting from USB on RPi3

[Jonathan Chen]

On Wed, 22 Apr 2020 at 05:26, bob prohaska <fbsd at www.zefox.net> wrote:
>
> On Tue, Apr 21, 2020 at 10:32:03AM +1200, Jonathan Chen wrote:
> > On Tue, 21 Apr 2020 at 10:30, Jonathan Chen <jonc at chen.org.nz> wrote:
> > [...]
> > > > Where is the kernel loading from? I gather it's been long-time
> > > > practice to load the kernel from microSD and then mount the USB
> > > > device as root; it that what you're doing? It appears that using
> > > > usbboot (correctly!) would eliminate that extra step.
> > >
> > > The kernel loads from the external USB drive. The only thing on the
> > > microSD card is the renamed loader.efi and the loader.env file.
> >
> > And the u-boot, of course.
>
> You're doing what I'd like to accomplish. However, I take it the
> chain of events is that the Pi's GPU starts u-boot on the microSD,
> that starts FreeBSD's loader on the microSD card then FreeBSD's
> loader acceses the USB drive. I gather there is no bootable FAT32
> partition on the USB drive.
>
> Have I got that right?

Yes.
-- 
Jonathan Chen <jonc at chen.org.nz>