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enable.c revision 1.2 
      1 /*	$NetBSD: enable.c,v 1.2 1998/02/05 04:57:55 gwr Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Gordon W. Ross.
      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 #include <sys/param.h>
     40 #include <machine/fbio.h>
     41 #include <sun3/dev/fbvar.h>
     42 #include <sun3/sun3/machdep.h>
     43 #include <sun3/sun3x/enable.h>
     44 #include <sun3/sun3x/obio.h>
     45 
     46 volatile short *enable_reg;
     47 
     48 void
     49 enable_init()
     50 {
     51 
     52 	enable_reg = (short*) obio_find_mapping(OBIO_ENABLEREG, 2);
     53 }
     54 
     55 
     56 /*
     57  * External interfaces to the system enable register.
     58  */
     59 
     60 void
     61 enable_fpu(on)
     62 	int on;
     63 {
     64 	int s;
     65 	short ena;
     66 
     67 	s = splhigh();
     68 	ena = *enable_reg;
     69 
     70 	if (on)
     71 		ena |= ENA_FPP;
     72 	else
     73 		ena &= ~ENA_FPP;
     74 
     75 	*enable_reg = ena;
     76 	splx(s);
     77 }
     78 
     79 void
     80 enable_video(on)
     81 	int on;
     82 {
     83 	int s;
     84 	short ena;
     85 
     86 	s = splhigh();
     87 	ena = *enable_reg;
     88 
     89 	if (on)
     90 		ena |= ENA_VIDEO;
     91 	else
     92 		ena &= ~ENA_VIDEO;
     93 
     94 	*enable_reg = ena;
     95 	splx(s);
     96 }
     97 
     98