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enable.c revision 1.7 
      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