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hpcdma.h revision 1.1 
      1 /*	$NetBSD: hpcdma.h,v 1.1 2001/08/19 03:16:21 wdk Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2001 Wayne Knowles
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Wayne Knowles
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef _SGIMIPS_BUS_DMA_H
     40 #define _SGIMIPS_BUS_DMA_H
     41 
     42 #include <machine/bus.h>
     43 
     44 struct hpc_dma_softc {
     45 	bus_space_tag_t		sc_bst;
     46 	bus_space_handle_t	sc_bsh;
     47 	bus_dma_tag_t		sc_dmat;
     48 
     49 	u_int32_t		sc_flags;
     50 #define	HPC_DMA_ACTIVE	0x80
     51 #define	HPC_DMA_READ	0x20
     52 	u_int32_t		sc_dmacmd;
     53 	int			sc_ndesc;
     54 	bus_dmamap_t		sc_dmamap;
     55 	struct hpc_dma_desc    *sc_desc_kva; /* Virtual address */
     56 	struct hpc_dma_desc    *sc_desc_pa; /* Physical address */
     57 };
     58 
     59 
     60 void hpcdma_init(struct hpc_attach_args *, struct hpc_dma_softc *, int);
     61 void hpcdma_sglist_create(struct hpc_dma_softc *, bus_dmamap_t);
     62 void hpcdma_cntl(struct hpc_dma_softc *, u_int32_t);
     63 void hpcdma_flush(struct hpc_dma_softc *);
     64 
     65 #endif
     66