On Thu, 22 Jul 2004 06:50:09 -0700
john heasley <heas@shrubbery.net> wrote:

> > Thus resulting in a double mapping of the previously allocated and maped
> > "x" DMA memory. The physical "y" memory is subregion of the physical "x"
> > memory mapped at a different KVA.
[...]
> I believe thats the purpose of
>=20
> bus_space(9):
>=20
>      Some drivers need to be able to pass a subregion of already-mapped b=
us
>      space to another driver or module within a driver.  The
>      bus_space_subregion() function allows such subregions to be created.
I am talking about bus_dma(9), not bus_space(9)...
--=20


tsch=FC=DF,
       Jochen

Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/