[RFC] remove bus_memio.h and bus_pio.h

From: Takahashi Yoshihiro (nyan_at_jp.FreeBSD.org)
Date: 05/25/05

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    Date: Wed, 25 May 2005 21:20:09 +0900 (JST)
    To: arch@freebsd.org
    
    

    The bus_memio.h and bus_pio.h for a micro-optimization depend on the
    implementation of the bus_space on i386 and amd64, so they are
    meaningless files on the other archs. I'd like to remove a MD part
    like this from MI drivers at least.

    I think that a increasing performance by using this method is very
    trivial on recent machines. If there is not strong objection, I'll
    remove bus_{mem,p}io.h and related code from all archs.

    Comments?

    ---
    TAKAHASHI Yoshihiro <nyan@jp.FreeBSD.org>
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