sys/arch/sun3/sun3x/enable.h

   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  *
  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