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Date: Fri, 13 Jun 2003 19:07:05 -0400 (EDT)
From: Jeff Roberson <jroberson@chesapeake.net>
To: Andrew Gallatin <gallatin@cs.duke.edu>
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cc: Andrea Cocito <andrea.cocito@ieo-research.it>
cc: freebsd-alpha@freebsd.org
cc: orlando.bassotto@ieo-research.it
Subject: Re: 5.1beta2 on Alpha ES40 w/ 32GB pys ram
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On Wed, 4 Jun 2003, Andrew Gallatin wrote:

>
>
> Andrea Cocito writes:
>  > Hallo,
>  >
>  > I have a little (??) problem trying to boot FreeBSD 5.1beta2
>  > on an ES40 with 32 gigs of  physical RAM, this is the status:
>  >
>
> You have to limit physical memory to 2GB or less.  Otherwise, DMAs
> won't work.
>
> Drew

Is this because we dont program the TLB on the DMA controller?  I heard
rumors that sparc64 has code to handle all of this for their chipsets.  If
they have the infrastructure it may not be hard to port.