[RFC] 4xx hardware watchpoint support

[Luis Machado]

> This doesn't look right for how it's coded.  This would be the
> CONFIG_4xx || CONFIG_BOOKE case, but CONFIG_4xx includes PowerPC 405.
> That has a different bit layout among the DBCR registers.  Namely, on
> 405 you would be clearing the TDE and IAC1 events because the DAC
> events are in DBCR1, not DBCR0.

Maybe guarding the 405-specific parts in a separate "#if
defined(CONFIG_40x)" block will do?

Do you think it's worth to support this facility on 405's processors? If
so, i'll gladly work on a solution to it.

Regards,
Luis