NOTES:

* STILL BROKEN: 

1.  We need to tell the higher levels of the OS that the disk is formatted without
    requiring the user to eject the floppy.

Cleanup: do SWIMIIICopyRegs in EnterHardwareLockSection.

* WARNINGS (that should be cleaned up):

1.  Need to include headers for kvtophys, delay, flush_dcache, invalidate_dcache,
    IOMalloc, sleep, wakeup in order to verify usage....
2.  Verify use of invalidate_dcache in place of invalidate_cache_for_io.
3.  dbdmasupport.c: implicit declaration of IOMallocContiguous and IOFreeContiguous.
4.  extern.c: implicit declarations of delay, invalidate_cache_for_io, and
    flush_dcache.
5.  floppy_iocache.c: implicit declarations of flush_dcache and invalidate_dcache.
6.  grcswimiiihal.c: implicit declaration of PrintDMA and kvtophys.
    incompatible pointer type for arg 2 of dbdma_start.
7.  swimiiicommonhal.c: implicit declaration of delay.