sys/arch/sun3/sun3x/enable.c

   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  *
  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 2006/10/03 13:02:32 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