1 /* $NetBSD: dvma3x.h,v 1.7 2008/04/28 20:23:38 martin 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 (SUN3X specific) 34 * 35 * (Most of the comments pertaining to the sun3x DVMA are now 36 * in sun3x/dvma.c) 37 * 38 * Note that while the DVMA harware makes the last 1MB visible 39 * for secondary masters, the PROM "owns" the last page of it. 40 * Also note that OBIO devices can actually see the last 16MB 41 * of kernel virtual space. That can be mostly ignored, except 42 * when calculating the alias address for slave access. 43 */ 44 #define DVMA_MAP_BASE 0xFFF00000 45 #define DVMA_MAP_SIZE 0x00100000 46 #define DVMA_MAP_AVAIL (DVMA_MAP_SIZE-PAGE_SIZE) 47 48 /* 49 * To convert an address in DVMA space to a slave address, 50 * just use a logical AND with one of the following masks. 51 * To convert back, just logical OR with the base address. 52 */ 53 #define DVMA_OBIO_SLAVE_BASE 0xFF000000 54 #define DVMA_OBIO_SLAVE_MASK 0x00FFffff /* 16MB */ 55 56 #define DVMA_VME_SLAVE_BASE 0xFFF00000 57 #define DVMA_VME_SLAVE_MASK 0x000Fffff /* 1MB */ 58