John Baldwin ef58e744a3 Make ex(4) MPSAFE:
- Add a mutex to the softc to protect the softc and device hardware.
- Use a private watchdog timer.
- Setup interrupt handler after ether_ifattach().
- Use bus_foo() rather than bus_space_foo() and remove bus space tag and
  handle from softc.

Tested by:	imp
2008-06-13 12:14:22 +00:00
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2008-06-13 12:14:22 +00:00
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