From owner-freebsd-alpha  Wed Aug 18  6:57:15 1999
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Date: Wed, 18 Aug 1999 15:04:50 +0100 (BST)
From: Doug Rabson <dfr@nlsystems.com>
To: Peter Wemm <peter@netplex.com.au>
Cc: alpha@freebsd.org
Subject: Re: rman_get_virtual() on alpha
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On Wed, 18 Aug 1999, Peter Wemm wrote:

> So, what's the situation these days with rman_get_virtual()?  if_fxp explodes
> on the alpha because it allocates SYS_RES_MEMORY and wants the virtual
> address of it, but the alpha still is returning physical addresses it seems.
> 
> It seems to me we might need some alternative to rman_get_virtual since it
> doesn't have enough context and is just a hack.  Perhaps allocating memory
> and activating a mapping etc needs to be seperate bus methods?  That way we
> can allocate memory, and later activate it (pmap_mapdev on x86, BWX, or
> DENSE on Alpha as requested) and free it's kvm mappings?

The fxp driver should probable use SYS_RES_DENSE to get the right virtual
pointer. It would certainly be a lot cleaner to separate the resource
allocation from the virtual mapping.

--
Doug Rabson				Mail:  dfr@nlsystems.com
Nonlinear Systems Ltd.			Phone: +44 181 442 9037




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