Sequoia build with KDBG
jwboyer at linux.vnet.ibm.com
Sun Mar 2 00:13:15 EST 2008
On Fri, 29 Feb 2008 23:02:50 -0600
Olof Johansson <olof at lixom.net> 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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