From owner-freebsd-current  Fri Sep  7 16:24:50 2001
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To: Bruce Evans <bde@zeta.org.au>
Subject: Re: RFC: hack volatile bzero and bcopy 
Cc: John Baldwin <jhb@FreeBSD.ORG>,
	Julian Elischer <julian@vicor-nb.com>, current@FreeBSD.ORG
In-reply-to: Your message of "Fri, 07 Sep 2001 20:55:11 +1000."
		<20010907203306.J38152-100000@alphplex.bde.org> 
References: <20010907203306.J38152-100000@alphplex.bde.org>  
Date: Fri, 07 Sep 2001 17:24:40 -0600
From: Warner Losh <imp@harmony.village.org>
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In message <20010907203306.J38152-100000@alphplex.bde.org> Bruce Evans writes:
: In the case of if_ie.c and bcopy(), bcopy() is not suitable for copying
: memory that doesn't behave like RAM.  Some optimized versions of it
: do out of order and/or repeated copies.  This might be very bad for
: volatile device memory.  I think rewriting if_ie.c to use bus_space
: would make most of the warnings go away automatically.

Right.  bus_space_read/write_N likely should be used instead.

Warner

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