In some email I received from Paul Kranenburg, sie wrote:
> > >Description:
> > 	In /sys/arch/sparc/include/bus.h, both bus_space_alloc and
> > bus_space_free are commented out.  Unless there is another path to
> > follow, these functions are needed for writing a PCMCIA driver for
> > the stp4020.
> 
> I cannot think of any meaningful implementation for bus_space_{alloc,free}()
> for the Sbus. An sbus stp4020 driver should probably look for other
> ways to implement pcmcia_io_alloc() et.al.

I looked (briefly) at other bus_space_alloc()'s and they seemed to be
based on "extents".  Does this mean that NetBSD/sparc won't support
"extent" mappings for SBUS machines ?

> A pcmcia `chipset interface' manual page is also sorely missing, btw..

You mean as in pcmcia(9) ?

Darren