69 lines
3.3 KiB
C
69 lines
3.3 KiB
C
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/* $NetBSD: enable.h,v 1.1 1997/01/14 20:57:07 gwr Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jeremy Cooper.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* System Enable Register
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* The Sun3x System Enable Register controls the function of a few
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* on-board devices and general system operation. It is cleared when
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* the system is reset.
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*
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* 15 0
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* +---+---+---+---+---+---+---+---+---+---+---+---+---+---.---.---+
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* |BT |FPP|DMA| 0 |VID|RES|FPA|DIA| 0 |CCH|IOC|LBK|DCH| UNUSED |
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* +---+---+---+---+---+---+---+---+---+---+---+---+---+---.---.---+
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*
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*
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* Bits in the Enable Register defined.
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*/
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#define ENA_DBGCACHE 0x0008 /* Debug mode for system cache */
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#define ENA_LOOPBACK 0x0010 /* VME loopback mode */
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#define ENA_IOCACHE 0x0020 /* Enable I/O cache */
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#define ENA_CACHE 0x0040 /* Enable system cache */
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#define ENA_DIAG 0x0100 /* Diagnostic switch */
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#define ENA_FPA 0x0200 /* Enable floating point acc. */
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#define ENA_RES 0x0400 /* Video display resolution (0 => hi, 1 => low) */
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#define ENA_VIDEO 0x0800 /* Enable video display */
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#define ENA_SDVMA 0x2000 /* Enable system DVMA */
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#define ENA_FPP 0x4000 /* Enable floating point coprocessor */
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#define ENA_NOTBOOT 0x8000 /* Non-boot state (0 => boot, 1 => normal) */
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#ifdef _KERNEL
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extern volatile short *enable_reg;
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#endif
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