82 lines
2.8 KiB
Plaintext
82 lines
2.8 KiB
Plaintext
.\" $NetBSD: title.me,v 1.1 1998/07/15 00:34:55 thorpej Exp $
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.\"
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.\" Copyright (c) 1998 Jason R. Thorpe.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgements:
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.\" This product includes software developed for the NetBSD Project
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.\" by Jason R. Thorpe.
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.\" 4. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.ll 6.5i
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.lp
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.nr PS 14
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.ps 14
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.ce
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.b
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A Machine-Independent DMA Framework for NetBSD
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.r
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.nr PS 12
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.ps 12
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.sp
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.ce
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.r
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.sp
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.ce
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.r
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Jason R. Thorpe\**
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.ce
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.i
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Numerical Aerospace Simulation Facility
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.ce
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NASA Ames Research Center
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.r
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.sp
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.\" Set up 2-column output for the remainder of the paper
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.2c 0.25i
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.nr PS 12
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.ps 12
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.ce
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.b Abstract
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.nr PS 10
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.ps 10
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.pp
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One of the challenges in implementing a portable kernel is finding
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good abstractions for semantically-similar operations which often have
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very machine-dependent implementations. This is especially important
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on modern machines which share common architectural features, e.g.
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the PCI bus.
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.pp
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This paper describes why a machine-independent DMA mapping abstraction
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is needed, the design considerations for such an abstraction, and the
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implementation of this abstraction in the NetBSD/alpha and
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NetBSD/i386 kernels.
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.\" Set up 2-column output for the remainder of the paper
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.\" .2c 0.25i
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.(f
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\**Jason R. Thorpe is an employee of MRJ Technology Solutions, Inc.
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This work is funded by NASA contract NAS2-14303.
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.)f
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