82 lines
2.9 KiB
C
82 lines
2.9 KiB
C
/* $NetBSD: bus_dma_hpcmips.h,v 1.2 2002/01/06 12:39:55 takemura Exp $ */
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/*-
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* Copyright (c) 2001 TAKEMRUA Shin. 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. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, 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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*/
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#ifndef _BUS_DMA_HPCMIPS_H_
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#define _BUS_DMA_HPCMIPS_H_
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#define HPCMIPS_DMAMAP_COHERENT 0x100 /* no cache flush necessary on sync */
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/*
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* bus_dma_segment
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*
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* Describes a single contiguous DMA transaction. Values
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* are suitable for programming into DMA registers.
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*/
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struct bus_dma_segment_hpcmips {
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bus_addr_t _ds_vaddr; /* virtual address, 0 if invalid */
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};
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/*
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* bus_dma_tag
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*
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* A machine-dependent opaque type describing the implementation of
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* DMA for a given bus.
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*/
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struct bus_dma_tag_hpcmips {
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struct bus_dma_tag bdt;
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void *_dmamap_chipset_v;
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};
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/*
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* bus_dmamap
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*
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* Describes a DMA mapping.
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*/
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struct bus_dmamap_hpcmips {
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struct bus_dmamap bdm;
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bus_size_t _dm_size; /* largest DMA transfer mappable */
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int _dm_segcnt; /* number of segs this map can map */
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bus_size_t _dm_maxsegsz; /* largest possible segment */
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bus_size_t _dm_boundary; /* don't cross this */
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int _dm_flags; /* misc. flags */
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struct bus_dma_segment_hpcmips _dm_segs[1];
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};
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extern struct bus_dma_tag_hpcmips hpcmips_default_bus_dma_tag;
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bus_dma_protos(_hpcmips)
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int _hpcmips_bd_mem_alloc_range __P((bus_dma_tag_t tag, bus_size_t size,
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bus_size_t alignment, bus_size_t boundary,
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bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags,
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vaddr_t low, vaddr_t high));
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#endif /* _BUS_DMA_HPCMIPS_H_ */
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