1 /* $NetBSD: enable.c,v 1.7 2006/10/03 13:02:32 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 * 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 1.7 2006/10/03 13:02:32 tsutsui Exp $"); 41 42 #include <sys/param.h> 43 #include <uvm/uvm_extern.h> 44 #include <machine/bus.h> 45 #include <dev/sun/fbio.h> 46 #include <sun3/dev/fbvar.h> 47 #include <sun3/sun3/machdep.h> 48 #include <sun3/sun3x/enable.h> 49 #include <sun3/sun3x/obio.h> 50 51 volatile short *enable_reg; 52 53 void 54 enable_init(void) 55 { 56 vaddr_t va; 57 58 find_prom_map(OBIO_ENABLEREG, PMAP_OBIO, 2, &va); 59 enable_reg = (void *)va; 60 } 61 62 63 /* 64 * External interfaces to the system enable register. 65 */ 66 67 void 68 enable_fpu(int on) 69 { 70 int s; 71 short ena; 72 73 s = splhigh(); 74 ena = *enable_reg; 75 76 if (on) 77 ena |= ENA_FPP; 78 else 79 ena &= ~ENA_FPP; 80 81 *enable_reg = ena; 82 splx(s); 83 } 84 85 void 86 enable_video(int on) 87 { 88 int s; 89 short ena; 90 91 s = splhigh(); 92 ena = *enable_reg; 93 94 if (on) 95 ena |= ENA_VIDEO; 96 else 97 ena &= ~ENA_VIDEO; 98 99 *enable_reg = ena; 100 splx(s); 101 } 102 103