RE: JTAG debugging of the kernel

[Peter Barada <peterb@logicpd.com>]

On Fri, 2008-08-15 at 23:04 +0530, Syed Mohammed, Khasim wrote:
> 
> > -----Original Message-----
> > From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-owner@vger.kernel.org] On Behalf Of Peter
> > Barada
> > Sent: Friday, August 15, 2008 8:34 PM
> > To: linux-omap@vger.kernel.org
> > Subject: JTAG debugging of the kernel
> > 
> > I've been trying to use JTAG (and an Abatron BDI-2000) to debug the ALSA
> > driver to determine why madplay can't keep up when pulling .mp3 from an
> > SD card, and have not had any luck trying to halt via JTAG and set/stop
> > at breakpoints within the kernelthe kernel.  I've found that JTAG works
> > for a while on kernel startup, but stops working at a non-reproducible
> > point in the startup code.
> > 
> > Have people had success using a BDI-2000 to debug the kernel after it
> > has completed startup?
> > 
> > Any suggestions on what can cause the JTAG to stop working after the
> > kernel starts?
> > 
> 
> I think you should disable Power Management. Which kernel are you using now?

2.6.22.18.  I'm planning to move to 2.6.26 after the dust settles...

I'll try w/o power management, but any idea why power management might
affect JTAG?

> Regards,
> Khasim