Re: FreeBSD on Zynq (Cortex-A9), new Phy for cgem0?

On Thu, 13 Nov 2025 11:49:19 -0800
Shiro <rt9f.3141@gmail.com> wrote:

> >> 
> >> I’m running 14.3 on a Zynq 7020 with excellent results so far and
> >> hope to continue to use 15.+ on this platform.
> >> 
> >> The problem I now face is to support a new Phy on cgem0. Rather
> >> than modify - test - rebuild - reboot the kernel, I’d like to
> >> develop and debug cgem0+Phy as a KLD (using USB-Eth in the
> >> meantime). My platform is nearly identical to ZEDBOARD.
> >> 
> >> How do I modify the build so that cgem0 (with Phys) is built as a
> >> KLD? My thinking is I’d be able to modify, load, test/debug, unload
> >> the KLD faster. Am I missing anything?  
> > 
> > No need to build it as single KLD, just build a cgem KLD and let it
> > load PHY kld. I need to investigate what I tested in some past, but
> > it was something like this. Also, all bits necessary to build it
> > this way should be already in place.  
> 
> Thanks for the prompt reply.
> I can create a kernel without cgem, mii, and axe (USB Ethernet),
> loaded as modules.  But it’s not helpful, the mii module is needed by
> USB, so it loads automatically… I’m making some progress with the
> in-kernel Phy code…
> 

That's right... I used serial console when I worked on something
network related, so I can unload both cgem and mii modules. I think it
is possible somehow create smaller kld with only some mii phy drivers,
but I did not try that.

Regards,
Milan