Re: 64-bit pi 3 grief

[John Klos <john%ziaspace.com@localhost>]

> Still, have to ask, has anyone cross compiled 64-bit netbsd arm, using
> 64-bit netbsd arm with 1GB of ram?

If it's 64 bit NetBSD ARM compiling 64 bit NetBSD ARM, then it's not cross 
compiled.

I've natively run an aarch64 build on a Pi many times.


> Now I hit two problems:
> #1: the kernel doesn't wait for the sd0 to come online and instead
> prompts for the root device (I hit this long ago on an odroid, and the
> SSD was a workaround ...)

Add this to config.txt on your MS-DOS partition on the SD card:

# Waits a while so spinning rust disk has time to spin up
boot_delay=10


> #2: the prompt displays "root device: ld0", I think it should have
> displayed "root device: sd0a" since that is what was specified
> Should "init" have waited longer for "sd0a" before prompting for the
> root device (perhaps it waited for ld0?).  Since "sd0" does come
> online while "init" is sitting at the "root device" prompt, should
> "init" be able to detect this?
> Any workarounds?  I"m building a custom kernel with "root on sd0" to
> see if it helps.

NetBSD-current uses boot.cfg on the MS-DOS partition on the SD card, which 
would look like this:

menu=Boot normally:rndseed /var/db/entropy-file;boot netbsd root=/dev/sd0a
menu=Boot single user:rndseed /var/db/entropy-file;boot netbsd root=/dev/sd0a -s
menu=Drop to boot prompt:prompt
default=1
timeout=8

NetBSD-9, though, can have an alternate root by changing this line in 
cmdline.txt on the MS-DOS partition on the SD card like so:

root=sd0a console=fb


> setup #3:
> - Pi3 with latest 9 GENERIC64 kernel on SD card; cross compiled from linux
> - root=sd0a console=fb
> - wired ethernet
> but:
> - usb keyboard (either from power-up, or plugged in after the "root
> device" prompt)
> - sd0a is a usb/*spinning-disk* (configured kernel boot param)
> Kaboom.  Based on the HIDs and USBs in the backtrace, and page upon
> page of what look like usb message dumps, I'm guessing its the kernel
> trying to read the keyboard.

Can you send a picture of this?

John