[U-Boot-Users] U-Boot on MPC8280

George G. Davis davis_g at comcast.net
Wed Jan 7 16:50:44 CET 2004

On Wed, Jan 07, 2004 at 03:24:46PM -0000, David Aldrich wrote:
> Hi Wolfgang
> May I ask one further question re. the BDI2000?  An article on the
> internet states:
> "You might be wondering why the BDI2000 only works with kernel-mode code
> and not user-land application code. The technical details are beyond the
> scope of this AppNote. The 10,000 foot answer is that while the BDI2000
> can work with the MMU enabled, it can only work with a single continuous
> memory map. Kernel-mode code exists in a single continuous memory map,
> which is disjoint from all of the user-land process memory maps. As an
> example of the usefulness of this tool in production environments, the
> PPC porting engineers at Monta Vista Software use the BDI2000
> extensively for kernel bring-up and device driver debug"
> Is it true that the BDI is not suitable for user app debug?  Is this a
> problem in practice?

My US$0.02...

I'm not personally aware of the issues using the BDI2000 to debug user
space code. But in practice you do not need a hardware debugger to
debug user space code. Just use gdb and/or gdbserver to debug your
user space code.


> Thanks
> David
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