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sgmapvar.h revision 1.6 
      1 /* $NetBSD: sgmapvar.h,v 1.6 1998/01/18 00:05:34 thorpej Exp $ */
      2 
      3 #define	SGMAP_LOG
      4 
      5 /*-
      6  * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
      7  * All rights reserved.
      8  *
      9  * This code is derived from software contributed to The NetBSD Foundation
     10  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
     11  * NASA Ames Research Center.
     12  *
     13  * Redistribution and use in source and binary forms, with or without
     14  * modification, are permitted provided that the following conditions
     15  * are met:
     16  * 1. Redistributions of source code must retain the above copyright
     17  *    notice, this list of conditions and the following disclaimer.
     18  * 2. Redistributions in binary form must reproduce the above copyright
     19  *    notice, this list of conditions and the following disclaimer in the
     20  *    documentation and/or other materials provided with the distribution.
     21  * 3. All advertising materials mentioning features or use of this software
     22  *    must display the following acknowledgement:
     23  *	This product includes software developed by the NetBSD
     24  *	Foundation, Inc. and its contributors.
     25  * 4. Neither the name of The NetBSD Foundation nor the names of its
     26  *    contributors may be used to endorse or promote products derived
     27  *    from this software without specific prior written permission.
     28  *
     29  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     30  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     31  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     32  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     33  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     34  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     35  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     36  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     37  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     38  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     39  * POSSIBILITY OF SUCH DAMAGE.
     40  */
     41 
     42 #include <sys/extent.h>
     43 #include <machine/bus.h>
     44 
     45 /*
     46  * Bits n:13 of the DMA address are the index of the PTE into
     47  * the SGMAP page table.
     48  */
     49 #define	SGMAP_ADDR_PTEIDX_SHIFT	13
     50 
     51 /*
     52  * An Alpha SGMAP's state information.
     53  */
     54 struct alpha_sgmap {
     55 	struct extent *aps_ex;		/* extent map to manage sgva space */
     56 	void	*aps_pt;		/* page table */
     57 	bus_addr_t aps_ptpa;		/* page table physical address */
     58 	bus_addr_t aps_sgvabase;	/* base of the sgva space */
     59 	bus_size_t aps_sgvasize;	/* size of the sgva space */
     60 	bus_addr_t aps_wbase;		/* base of the dma window */
     61 };
     62 
     63 #ifdef SGMAP_LOG
     64 /*
     65  * Log entry, used for debugging SGMAPs.
     66  */
     67 struct sgmap_log_entry {
     68 	int	sl_op;			/* op; 1 = load, 0 = unload */
     69 	struct alpha_sgmap *sl_sgmap;	/* sgmap for entry */
     70 	void	*sl_origbuf;		/* original buffer */
     71 	u_long	sl_pgoffset;		/* page offset of buffer start */
     72 	u_long	sl_origlen;		/* length of transfer */
     73 	u_long	sl_sgva;		/* sgva of transfer */
     74 	u_long	sl_dmaaddr;		/* dma address */
     75 	int	sl_ptecnt;		/* pte count */
     76 };
     77 #endif
     78 
     79 extern	vm_offset_t alpha_sgmap_prefetch_spill_page_va;
     80 extern	bus_addr_t alpha_sgmap_prefetch_spill_page_pa;
     81 
     82 void	alpha_sgmap_init __P((bus_dma_tag_t, struct alpha_sgmap *,
     83 	    const char *, bus_addr_t, bus_addr_t, bus_size_t, size_t, void *,
     84 	    bus_size_t));
     85 
     86 int	alpha_sgmap_alloc __P((bus_dmamap_t, bus_size_t,
     87 	    struct alpha_sgmap *, int));
     88 void	alpha_sgmap_free __P((bus_dmamap_t, struct alpha_sgmap *));
     89