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      1 /*	$NetBSD: dvma3.h,v 1.12 2024/07/20 20:36:33 andvar 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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * DVMA (SUN3 specific)
     34  *
     35  * Note that while the DVMA hardware makes the last 1MB visible
     36  * for secondary masters, the PROM "owns" the last page of it.
     37  * Also note that OBIO devices can actually see the last 16MB
     38  * of kernel virtual space.  That can be mostly ignored, except
     39  * when calculating the alias address for slave access.
     40  */
     41 #define DVMA_MAP_BASE	0x0FF00000
     42 #define DVMA_MAP_SIZE	0x00100000
     43 #define DVMA_MAP_AVAIL	(DVMA_MAP_SIZE-PAGE_SIZE)
     44 
     45 /*
     46  * To convert an address in DVMA space to a slave address,
     47  * just use a logical AND with one of the following masks.
     48  * To convert back, just logical OR with the base address.
     49  */
     50 #define DVMA_OBIO_SLAVE_BASE	0x0F000000
     51 #define DVMA_OBIO_SLAVE_MASK	0x00FFffff	/* 16MB */
     52 
     53 #define DVMA_VME_SLAVE_BASE 	0x0FF00000
     54 #define DVMA_VME_SLAVE_MASK 	0x000Fffff	/*  1MB */
     55