Sequoia build with KDBG

Josh Boyer jwboyer at
Sun Mar 2 00:13:15 EST 2008

On Fri, 29 Feb 2008 23:02:50 -0600
Olof Johansson <olof at> wrote:

> On Fri, Feb 29, 2008 at 08:30:15PM -0600, Josh Boyer wrote:
> > > poor man's debugging works fine if a serial port is available, but my 
> > > Sequoia platform doesn't get that far!  I use u-boot to download and 
> > > boot my image, and I don't get any serial output after the boot completes:
> > 
> > By "poking characters out the serial port" I meant I literally coded up
> > assembly functions to setup MMU translations and poke hex values at hard
> > coded addresses.  That's why it's "poor man's".  If you had a working
> > serial port out of the box, that would be a luxury ;).
> Does 4xx have support for udbg and xmon? That would be a good first step
> in getting an in-kernel debugger facility going.

Yes.  Or at least it did as of a few kernel releases ago when I last
tested it.  It's helpful for a number of thing, but debugging extremely
early stuff isn't possible with it.


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