From owner-freebsd-alpha  Tue Sep  8 12:58:18 1998
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Date: Tue, 8 Sep 1998 13:52:03 -0600 (MDT)
From: "Justin T. Gibbs" <gibbs@narnia.plutotech.com>
Message-Id: <199809081952.NAA06723@narnia.plutotech.com>
To: Doug Rabson <dfr@nlsystems.com>
cc: alpha@FreeBSD.ORG
Subject: Re: Bt848 driver for Alpha
Newsgroups: pluto.freebsd.alpha
In-Reply-To: <Pine.BSF.4.01.9809080932410.796-100000@herring.nlsystems.com>
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In article <Pine.BSF.4.01.9809080932410.796-100000@herring.nlsystems.com> you wrote:
> On Mon, 7 Sep 1998, Roger Hardiman wrote:
> 
> I would suggest something like the ncr driver:
> 
> 	...
> 	vm_offset_t	bt848;
> 
> 	#define REGOFF(x) (bt848 + offsetof(struct bt848_reg, x)
> 	#define READREGB(x) readb(REGOFF(x))
> 	#define WRITEREGB(x, v) writeb(REGOFF(x), v)

Ick. Ick. Ick.  Almost all of the CAM code uses the bus space facility
to do this.  Why re-invent the wheel?

--
Justin

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