Subject: Re: Why not track our xsrc with X11R6.6 from
To: Jason R Thorpe <>
From: Todd Vierling <>
List: current-users
Date: 07/20/2001 10:41:17
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 <>  *  Wasabi NetBSD:  Run with it.
-- NetBSD 1.5 now available on CD-ROM  --