[ipxe-devel] i354 support in the intel driver

[Michael Brown]

On 30/09/15 16:43, Patrick Agrain wrote:
> I tought that a first step could be to add the PCI_ROM() macro with the
> correct IDs, so that the device should be, at least, probed.
> The console output let me think that this is even not reached.
>
> Am I missing anything in the procedure ?
> Is there a way to increase the debug level ?
>
> <snip>
>
> Booting from ROM...
> Booting from c100:0361
> iPXE (PCI 00:14.0) starting execution...ok
>
> Note: from here it hangs...

So, it looks as though you may not be successfully reaching main(). 
This kind of problem is difficult to track down outside of a VM, unless 
you have some kind of hardware debugger available.

My recommendation would be to first find the simplest and most reliable 
mechanism available for debug output on this board.  If you have a debug 
I/O port available (similar to port 0xe9 in qemu VMs) then use that.  If 
you have a text-mode VGA console attached, then try writing directly to 
video memory at 0xb8000.  You ideally want something that can work even 
in the middle of a transition from real to protected mode.

Once you have something sufficiently robust, try adding output between 
the point that the "ok" is printed (the "call print_message" for 
exec_message_post_install in arch/i386/prefix/romprefix.S) and the point 
that the "initialising devices" message gets printed (in core/main.c).

Michael