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dvma3x.h revision 1.3 
      1 /*	$NetBSD: dvma3x.h,v 1.3 1997/10/16 15:45:46 gwr Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1996 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Gordon W. Ross.
      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 /*
     40  * DVMA (Direct Virtual Memory Access - like DMA)
     41  *
     42  * (Most of the comments pertaining to the sun3x DVMA are now
     43  *  in dvma.c)
     44  *
     45  * Relevant parts of virtual memory map are:
     46  *
     47  * FE00.0000  monitor map (devices)
     48  * FF00.0000  Begining of DVMA space
     49  * FFFF.FFFF  End of DVMA space
     50  */
     51 
     52 /*
     53  * To convert an address in DVMA space to a slave address,
     54  * just use a logical AND with one of the following masks.
     55  * To convert back, just logical OR with the base address.
     56  */
     57 #define DVMA_SLAVE_BASE 	0xFF000000
     58 #define DVMA_SLAVE_MASK 	0x00FFffff	/* 16MB */
     59 
     60 /* Compatibility with the sun3... */
     61 #define DVMA_OBIO_SLAVE_BASE DVMA_SLAVE_BASE
     62 
     63 /*
     64  * DVMA is the last 16MB, but the PROM owns the last 1M.
     65  * See mon.h: MON_DVMA_BASE, MON_DVMA_SIZE.
     66  */
     67 #define	DVMA_SPACE_START	0xFF000000
     68 #define DVMA_SPACE_LENGTH  	  0xF00000
     69 
     70 void dvma_init __P((void));
     71 
     72 /* Allocate/free actual pages of DVMA space. */
     73 void * dvma_malloc __P((size_t bytes));
     74 void dvma_free(void *addr, size_t bytes);
     75 
     76 /* Remap/unmap kernel memory in DVMA space. */
     77 void * dvma_mapin __P((void *kva, int len, int canwait));
     78 void dvma_mapout __P((void *dvma_addr, int len));
     79 
     80 /* Convert a kernel DVMA pointer to a slave address. */
     81 u_long dvma_kvtopa __P((void *kva, int bus));
     82 
     83