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freebsd-nq/sys/amd64/include/bus_dma.h

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Implementation of Bus Space for FreeBSD-x86. Obtained From: NetBSD
1998-01-15 07:32:56 +00:00
/*-
Refactor the bus_dma header files so that the interface is described in sys/bus_dma.h instead of being copied in every single arch. This slightly reorders a flag that was specific to AXP and thus changes the ABI there. The interface still relies on bus_space definitions found in <machine/bus.h> so it cannot be included on its own yet, but that will be fixed at a later date. Add an MD <machine/bus_dma.h> for ever arch for consistency and to allow for future MD augmentation of the API. sparc64 makes heavy use of this right now due to its different bus_dma implemenation.
2005-03-14 16:46:28 +00:00
* Copyright (c) 2005 Scott Long
Implementation of Bus Space for FreeBSD-x86. Obtained From: NetBSD
1998-01-15 07:32:56 +00:00
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
Refactor the bus_dma header files so that the interface is described in sys/bus_dma.h instead of being copied in every single arch. This slightly reorders a flag that was specific to AXP and thus changes the ABI there. The interface still relies on bus_space definitions found in <machine/bus.h> so it cannot be included on its own yet, but that will be fixed at a later date. Add an MD <machine/bus_dma.h> for ever arch for consistency and to allow for future MD augmentation of the API. sparc64 makes heavy use of this right now due to its different bus_dma implemenation.
2005-03-14 16:46:28 +00:00
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
Fix $FreeBSD$.
2005-07-22 04:03:25 +00:00
*
* $FreeBSD$
Implementation of Bus Space for FreeBSD-x86. Obtained From: NetBSD
1998-01-15 07:32:56 +00:00
*/
AMD64 physical space is much larger than i386, de-i386 the bus_space and bus_dma MD code for AMD64. (And a trivial ifdef update in dev/kbd because of this). More updates are needed here to take advantage of the 64 bit instructions. Approved by: re (blanket amd64/*)
2003-05-12 02:44:37 +00:00
#ifndef _AMD64_BUS_DMA_H_
#define _AMD64_BUS_DMA_H_
Implementation of Bus Space for FreeBSD-x86. Obtained From: NetBSD
1998-01-15 07:32:56 +00:00
Refactor the bus_dma header files so that the interface is described in sys/bus_dma.h instead of being copied in every single arch. This slightly reorders a flag that was specific to AXP and thus changes the ABI there. The interface still relies on bus_space definitions found in <machine/bus.h> so it cannot be included on its own yet, but that will be fixed at a later date. Add an MD <machine/bus_dma.h> for ever arch for consistency and to allow for future MD augmentation of the API. sparc64 makes heavy use of this right now due to its different bus_dma implemenation.
2005-03-14 16:46:28 +00:00
#include <sys/bus_dma.h>
Introduce bus_dmamap_load_mbuf_sg(). Instead of taking a callback arg, this cuts to the chase and fills in a provided s/g list. This is meant to optimize out the cost of the callback since the callback doesn't serve much purpose for mbufs since mbuf loads will never be deferred. This is just for amd64 and i386 at the moment, other arches will be coming shortly.
2005-01-07 07:57:18 +00:00
AMD64 physical space is much larger than i386, de-i386 the bus_space and bus_dma MD code for AMD64. (And a trivial ifdef update in dev/kbd because of this). More updates are needed here to take advantage of the 64 bit instructions. Approved by: re (blanket amd64/*)
2003-05-12 02:44:37 +00:00
#endif /* _AMD64_BUS_DMA_H_ */
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