1 /* $NetBSD: vaddrs.h,v 1.5 1994/12/06 08:34:14 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. All advertising materials mentioning features or use of this software 25 * must display the following acknowledgement: 26 * This product includes software developed by the University of 27 * California, Berkeley and its contributors. 28 * 4. Neither the name of the University nor the names of its contributors 29 * may be used to endorse or promote products derived from this software 30 * without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42 * SUCH DAMAGE. 43 * 44 * @(#)vaddrs.h 8.1 (Berkeley) 6/11/93 45 */ 46 47 /* 48 * Special (fixed) virtual addresses on the SPARC. 49 * 50 * IO virtual space begins at 0xfe000000 (a segment boundary) and 51 * continues up to the DMVA edge at 0xff000000. (The upper all-1s 52 * byte is special since some of the hardware supplies this to pad 53 * a 24-bit address space out to 32 bits. This is a legacy of the 54 * IBM PC AT bus, actually, just so you know who to blame.) 55 * 56 * We reserve several pages at the base of our IO virtual space 57 * for `oft-used' devices which must be present anyway in order to 58 * configure. In particular, we want the counter-timer register and 59 * the Zilog ZSCC serial port chips to be mapped at fixed VAs to make 60 * microtime() and the zs hardware interrupt handlers faster. 61 * 62 * Ideally, we should map the interrupt enable register here as well, 63 * but that would require allocating pmegs in locore.s, so instead we 64 * use one of the two `wasted' pages at KERNBASE+2*NBPG (see locore.s). 65 */ 66 67 #ifndef IODEV_0 68 #define IODEV_0 0xfe000000 /* must match VM_MAX_KERNEL_ADDRESS */ 69 70 #define TIMERREG_VA (IODEV_0) 71 #define ZS0_VA (IODEV_0 + 1*NBPG) 72 #define ZS1_VA (IODEV_0 + 2*NBPG) 73 #define AUXREG_VA (IODEV_0 + 3*NBPG) 74 #define TMPMAP_VA (IODEV_0 + 4*NBPG) 75 #define MSGBUF_VA (IODEV_0 + 5*NBPG) 76 #define IODEV_BASE (IODEV_0 + 6*NBPG) 77 #define IODEV_END 0xff000000 /* 16 MB of iospace */ 78 79 #define DVMA_BASE 0xfff00000 80 #define DVMA_END 0xfffc0000 81 82 #endif /* IODEV_0 */ 83