Re: Pi2 bootcode.bin puzzle

Theo <theom+news@chiark.greenend.org.uk> wrote:

bp@www.zefox.net wrote:

Mike Scott <usenet.16@scottsonline.org.uk.invalid> wrote:

On 29/03/2025 04:47, bp@www.zefox.net wrote:

I've yet to figure out what the FreeBSD equivalent to cmdline.txt
is. That might be the key to making your approach work.

 
Fbsd 13.x on a pi4, booting off a usb disk:
 
# cat /boot/msdos//config.txt
[all]
arm_64bit=1
dtparam=audio=on,i2c_arm=on,spi=on
dtoverlay=mmc
dtoverlay=disable-bt
device_tree_address=0x4000
kernel=u-boot.bin
 
[pi4]
hdmi_safe=1
armstub=armstub8-gic.bin
 
 
At least, I assume that's the equivalent file. :-)

 
AIUI, config.txt sets up the Pi, cmdline.txt furnishes
runtime arguments to the kernel when that kernel is
linux. If this isn't true somebody please correct me!

 
Does it show the FreeBSD beastie text-mode screen?
https://docs.freebsd.org/images/books/handbook/virtualization/qemu-freebsd02.png
 
In which case you can probably set things up in loader.conf:
https://docs.freebsd.org/en/books/handbook/boot/index.html#boot-loader
 
the same way you do on x86.

Might it be possible to let the machine boot from microSD to the
loader prompt, next re-load the kernel from the USB drive, then
start the new kernel and finally mountroot from USB?

That seems too easy. I must be missing something.

Thanks for writing!

bob prohaska