On Fri, 28 May 1999 20:29:00 -0700 
 Jonathan Stone <jonathan@DSG.Stanford.EDU> wrote:

 > Um, no, even that's not it. 

Um, yes it is.

 > What we need to do is create a _subclassed_ instance of a
 > bus_space_tag, and pass the (in C++ terms) `constructor' for a
 > PCI-derived bus_space_tag `subclass' some extra arguments which tell
 > it what the allowable `memory-space' window is on the sub-bus.

nonono...

The idea is that you want to have a range or list of ranges in the bus
space tag that bus_space_alloc() uses as the boundaries of the allocation
request.

...and when you create a CardBus bus space tag, you set the ranges to the
right thing, and then bus_space_alloc() just works.

        -- Jason R. Thorpe <thorpej@nas.nasa.gov>