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enable.h revision 1.1 
      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