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      1 /*	$NetBSD: enable.h,v 1.3 2013/09/06 17:43:19 tsutsui 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  *
     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  * System Enable Register
     34  * The Sun3x System Enable Register controls the function of a few
     35  * on-board devices and general system operation.  It is cleared when
     36  * the system is reset.
     37  *
     38  * 15                                                               0
     39  *  +---+---+---+---+---+---+---+---+---+---+---+---+---+---.---.---+
     40  *  |BT |FPP|DMA| 0 |VID|RES|FPA|DIA| 0 |CCH|IOC|LBK|DCH|  UNUSED   |
     41  *  +---+---+---+---+---+---+---+---+---+---+---+---+---+---.---.---+
     42  *
     43  *
     44  * Bits in the Enable Register defined.
     45  */
     46 #define	ENA_DBGCACHE	0x0008	/* Debug mode for system cache              */
     47 #define	ENA_LOOPBACK	0x0010	/* VME loopback mode                        */
     48 #define	ENA_IOCACHE	0x0020	/* Enable I/O cache                             */
     49 #define	ENA_CACHE	0x0040	/* Enable system cache                          */
     50 #define	ENA_DIAG	0x0100	/* Diagnostic switch                            */
     51 #define	ENA_FPA		0x0200	/* Enable floating point acc.                   */
     52 #define	ENA_RES		0x0400	/* Video display resolution (0 => hi, 1 => low) */
     53 #define	ENA_VIDEO	0x0800	/* Enable video display                         */
     54 #define	ENA_SDVMA	0x2000	/* Enable system DVMA                           */
     55 #define	ENA_FPP		0x4000	/* Enable floating point coprocessor            */
     56 #define	ENA_NOTBOOT	0x8000	/* Non-boot state (0 => boot, 1 => normal)      */
     57 
     58 #ifdef	_KERNEL
     59 extern volatile short *enable_reg;
     60 #endif
     61 
     62