¿Have you taken a look at the jtag tar in my contrib? It is described here http://lsub.org/ls/export/jtag.pdf I don´t know enough about the RealView ICE, but if you write the right module for whatever drives the serial communications maybe you can drive the jtag directly. I don´t know if that would give you anything you don´t have already but just in case you didn´t know :-)
> On 19 Dec 2013, at 06:12, Steven Stallion <sstall...@gmail.com> wrote: > > Evening 9fans, > > While working on the Chromebook (nee exynos) port I ended up in a > situation where I needed to use a more sophisticated JTAG debugger to > find an issue. I ended up grabbing a RealView ICE since they are > relatively cheap on eBay (around 500.00USD) compared to other models > capable of debugging Cortex-A15 cores. Older firmware revisions of the > RVI support the remote GDB protocol (in addition to the closed RDDI > protocol). I've written a simple 9P file server that translates > memory/register accesses to remote GDB targets. I haven't tried it > yet, but this should also work with OpenOCD as well. > > At the moment this is little more than a toy, but it has been stable > enough for me to debug issues on the board reliably. I've added > support for ARM and i386 for now - adding additional register maps for > the other mach types is straightforward. If there is enough demand, > I'll write up a man page and submit a patch. The setup for this isn't > particularly obvious since it requires some messing about with RVI > firmware updates and downloading the right version of RVDS to setup > the board, so a wiki page is deserved as well. > > For now, you can find the source in my contrib directory on sources: > /n/sources/contrib/stallion/src/gdbfs/ > > (Obligatory screenshot attached) > > Cheers, > > Steve > <gdbfs.png>
