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      1 /*	$NetBSD: enable.c,v 1.8 2013/09/07 15:56:11 tsutsui 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  *
     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 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: enable.c,v 1.8 2013/09/07 15:56:11 tsutsui Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <dev/sun/fbio.h>
     37 #include <sun3/dev/fbvar.h>
     38 
     39 #include <sun3/sun3/control.h>
     40 #include <sun3/sun3/enable.h>
     41 #include <sun3/sun3/machdep.h>
     42 
     43 /*
     44  * External interfaces to the system enable register.
     45  */
     46 
     47 void
     48 enable_fpu(int on)
     49 {
     50 	int s, ena;
     51 
     52 	s = splhigh();
     53 	ena = get_control_byte(SYSTEM_ENAB);
     54 
     55 	if (on)
     56 		ena |= ENA_FPP;
     57 	else
     58 		ena &= ~ENA_FPP;
     59 
     60 	set_control_byte(SYSTEM_ENAB, ena);
     61 	splx(s);
     62 }
     63 
     64 void
     65 enable_video(int on)
     66 {
     67 	int s, ena;
     68 
     69 	s = splhigh();
     70 	ena = get_control_byte(SYSTEM_ENAB);
     71 
     72 	if (on)
     73 		ena |= ENA_VIDEO;
     74 	else
     75 		ena &= ~ENA_VIDEO;
     76 
     77 	set_control_byte(SYSTEM_ENAB, ena);
     78 	splx(s);
     79 }
     80