On Sat, 8 Jul 2000, Paul Kranenburg wrote:

> > > I also hope to borrow much, if not all, of the Ebus stuff emerging
> > > in the sparc64 port. In fact, a common `/sys/dev/{sun/?}ebus'
> > > should be erected a.s.a.p.
> > 
> > I think you will need 64-bit `paddr_t's or `bus_addr_t's first.
> 
> Why?
> 
> The common bus code can import <machine/bus.h> to get those when
> needed. And if 64-bit entities are inherent to the ebus design,
> those should be coded as such explicitly. The common sbus interface
> and drivers work in the same way.

The common parts of sbus may be coded the same way but the sbus drivers
are not.  The sysio driver is quite dependent on `bus_addr_t' being
64-bits wide.  The same is true of the ebus driver.

Eduardo Horvath