1 /* $NetBSD: enable.c,v 1.7 2008/04/28 20:23:38 martin 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 1.7 2008/04/28 20:23:38 martin 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