Hi,
while the OpenOCD works fine with PXA250, IXP42x, and PXA255 afaik, it currently doesn’t seem to work with PXA27x targets.
The XScale code has been merged into trunk/, so you shouldn’t use the XScale branch anymore. With Marvell’s policy of requiring an NDA for every bit of information on their devices it’ll be difficult to find out what changes might be required to make OpenOCD with PXA270 devices.
Regards,
Dominic