arm11

--- Added burst memory transfer mode

This does not explicitly query command execution but rather uses a small
delay produced by the FT2232 on certain TAP commands.

A potential failure of this process is detected afterwards and the
program terminates with an error.

'arm11 memwrite burst disable'
  can be used to switch this feature off.

'arm11 memwrite error_fatal disable'
  can be used to prevent the program to exit on an memory write error


--- Added support for interrupt breaking via VCR register

Use 'arm11 vcr' command to set.


--- Cleaned up the handling of

halt/resume/step/poll, target->state, target->debug_reason,
target_call_event_callbacks() at least as far as I could guess the
intended behaviour from other targets.

Did some overall positive tests with GDB.


--- Added support for breakpoints

Hardware breakpoints only. All breakpoints will be treated as hardware
breakpoints.

All ARM11's seem to have at least 6 hardware breakpoints.

--- Stepping over BKPT added

Modification to PC without touching the target.

--- Stepping over a B or BL to self will do nothing


git-svn-id: svn://svn.berlios.de/openocd/trunk@385 b42882b7-edfa-0310-969c-e2dbd0fdcd60