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enable.c revision 1.5 
      1 /*	$NetBSD: enable.c,v 1.5 2005/01/22 15:36:10 chs 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/cdefs.h>
     40 __KERNEL_RCSID(0, "$NetBSD: enable.c,v 1.5 2005/01/22 15:36:10 chs Exp $");
     41 
     42 #include <sys/param.h>
     43 #include <dev/sun/fbio.h>
     44 #include <sun3/dev/fbvar.h>
     45 #include <sun3/sun3/machdep.h>
     46 #include <sun3/sun3x/enable.h>
     47 #include <sun3/sun3x/obio.h>
     48 
     49 volatile short *enable_reg;
     50 
     51 void
     52 enable_init(void)
     53 {
     54 
     55 	enable_reg = (short*) obio_find_mapping(OBIO_ENABLEREG, 2);
     56 }
     57 
     58 
     59 /*
     60  * External interfaces to the system enable register.
     61  */
     62 
     63 void
     64 enable_fpu(int on)
     65 {
     66 	int s;
     67 	short ena;
     68 
     69 	s = splhigh();
     70 	ena = *enable_reg;
     71 
     72 	if (on)
     73 		ena |= ENA_FPP;
     74 	else
     75 		ena &= ~ENA_FPP;
     76 
     77 	*enable_reg = ena;
     78 	splx(s);
     79 }
     80 
     81 void
     82 enable_video(int on)
     83 {
     84 	int s;
     85 	short ena;
     86 
     87 	s = splhigh();
     88 	ena = *enable_reg;
     89 
     90 	if (on)
     91 		ena |= ENA_VIDEO;
     92 	else
     93 		ena &= ~ENA_VIDEO;
     94 
     95 	*enable_reg = ena;
     96 	splx(s);
     97 }
     98 
     99