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Date:      Tue, 18 Jul 2000 21:14:11 -0600
From:      Warner Losh <imp@village.org>
To:        alex@big.endian.de (Alexander Langer)
Cc:        Chuck Paterson <cp@bsdi.com>, Poul-Henning Kamp <phk@critter.freebsd.dk>, arch@FreeBSD.ORG
Subject:   Re: removal of kvtop() on i386 
Message-ID:  <200007190314.VAA76870@harmony.village.org>
In-Reply-To: Your message of "Mon, 17 Jul 2000 18:42:08 %2B0200." <20000717184208.B26484@cichlids.cichlids.com> 
References:  <20000717184208.B26484@cichlids.cichlids.com>  <200007171441.IAA22202@berserker.bsdi.com> 

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In message <20000717184208.B26484@cichlids.cichlids.com> Alexander Langer writes:
: Thus spake Chuck Paterson (cp@bsdi.com):
: 
: > 	Has anybody though about how to change this for
: > architectures like Sparc where the whole idea of handing
: > a physical address to the drivers on a bus doesn't apply, and
: > where a unmapping/cache flushing operation must be done
: > at io completion.
: 
: Uhm.  Is that support for removing kvtop(), against removing kvtop()
: or just a questions beside that topic?

I'd take it as support :-)

: How do other *BSDs do that?

They use bus space and bus dma.  I'd point you to man pages, but you'd 
have to be on a netbsd or openbsd system to use them :-)

Warner


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