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      1 /*	$NetBSD: enable.c,v 1.9 2013/09/06 17:43:19 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 1.9 2013/09/06 17:43:19 tsutsui 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 
     44 volatile short *enable_reg;
     45 
     46 void
     47 enable_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 
     60 void
     61 enable_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 
     78 void
     79 enable_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