1 /* $NetBSD: enable.h,v 1.1 1997/01/14 20:57:07 gwr Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jeremy Cooper. 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 * System Enable Register 41 * The Sun3x System Enable Register controls the function of a few 42 * on-board devices and general system operation. It is cleared when 43 * the system is reset. 44 * 45 * 15 0 46 * +---+---+---+---+---+---+---+---+---+---+---+---+---+---.---.---+ 47 * |BT |FPP|DMA| 0 |VID|RES|FPA|DIA| 0 |CCH|IOC|LBK|DCH| UNUSED | 48 * +---+---+---+---+---+---+---+---+---+---+---+---+---+---.---.---+ 49 * 50 * 51 * Bits in the Enable Register defined. 52 */ 53 #define ENA_DBGCACHE 0x0008 /* Debug mode for system cache */ 54 #define ENA_LOOPBACK 0x0010 /* VME loopback mode */ 55 #define ENA_IOCACHE 0x0020 /* Enable I/O cache */ 56 #define ENA_CACHE 0x0040 /* Enable system cache */ 57 #define ENA_DIAG 0x0100 /* Diagnostic switch */ 58 #define ENA_FPA 0x0200 /* Enable floating point acc. */ 59 #define ENA_RES 0x0400 /* Video display resolution (0 => hi, 1 => low) */ 60 #define ENA_VIDEO 0x0800 /* Enable video display */ 61 #define ENA_SDVMA 0x2000 /* Enable system DVMA */ 62 #define ENA_FPP 0x4000 /* Enable floating point coprocessor */ 63 #define ENA_NOTBOOT 0x8000 /* Non-boot state (0 => boot, 1 => normal) */ 64 65 #ifdef _KERNEL 66 extern volatile short *enable_reg; 67 #endif 68 69