On Fri, 20 Jul 2001, Jason R Thorpe wrote:

:  > That's the function of the OS glue, deep down in bsd_video.c and friends
:  > that Simon is working on.
:
: Only the kernel can perform some of these functions, e.g. validate DMA
: addresses, and arbitrate writes to control registers.  Hell, only the
: kernel can enforce mmap'ing the allowed regions of the device!

...Hence why I said that an abstraction is needed to sever the control
register arbitration / DMA validation code from the rest of the device code.

-- 
-- Todd Vierling <tv@wasabisystems.com>  *  Wasabi NetBSD:  Run with it.
-- NetBSD 1.5 now available on CD-ROM  --  http://www.wasabisystems.com/