1/* $NetBSD: enable.c,v 1.8 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 1.8 2008/04/28 20:23:38 martin Exp $"); 34 35#include <sys/param.h> 36#include <uvm/uvm_extern.h> 37#include <machine/bus.h> 38#include <dev/sun/fbio.h> 39#include <sun3/dev/fbvar.h> 40#include <sun3/sun3/machdep.h> 41#include <sun3/sun3x/enable.h> 42#include <sun3/sun3x/obio.h> 43 44volatile short *enable_reg; 45 46void 47enable_init(void) 48{ 49 vaddr_t va; 50 51 find_prom_map(OBIO_ENABLEREG, PMAP_OBIO, 2, &va); 52 enable_reg = (void *)va; 53} 54 55 56/* 57 * External interfaces to the system enable register. 58 */ 59 60void 61enable_fpu(int on) 62{ 63 int s; 64 short ena; 65 66 s = splhigh(); 67 ena = *enable_reg; 68 69 if (on) 70 ena |= ENA_FPP; 71 else 72 ena &= ~ENA_FPP; 73 74 *enable_reg = ena; 75 splx(s); 76} 77 78void 79enable_video(int on) 80{ 81 int s; 82 short ena; 83 84 s = splhigh(); 85 ena = *enable_reg; 86 87 if (on) 88 ena |= ENA_VIDEO; 89 else 90 ena &= ~ENA_VIDEO; 91 92 *enable_reg = ena; 93 splx(s); 94} 95 96