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      1 /*	$NetBSD: control.c,v 1.24 2013/09/07 15:56:11 tsutsui Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1996 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Adam Glass and 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: control.c,v 1.24 2013/09/07 15:56:11 tsutsui Exp $");
     34 
     35 #include <sys/param.h>
     36 
     37 #include <machine/pte.h>
     38 #include <sun3/sun3/control.h>
     39 
     40 int
     41 get_context(void)
     42 {
     43 	return (get_control_byte(CONTEXT_REG) & CONTEXT_MASK);
     44 }
     45 
     46 void
     47 set_context(int c)
     48 {
     49 	set_control_byte(CONTEXT_REG, (c & CONTEXT_MASK));
     50 }
     51 
     52 u_int
     53 get_pte(vaddr_t va)
     54 {
     55 	return (get_control_word(CONTROL_ADDR_BUILD(PGMAP_BASE, va)));
     56 }
     57 
     58 void
     59 set_pte(vaddr_t va, u_int pte)
     60 {
     61 	set_control_word(CONTROL_ADDR_BUILD(PGMAP_BASE, va), pte);
     62 }
     63 
     64 int
     65 get_segmap(vaddr_t va)
     66 {
     67 	return (get_control_byte(CONTROL_ADDR_BUILD(SEGMAP_BASE, va)));
     68 }
     69 
     70 void
     71 set_segmap(vaddr_t va, int sme)
     72 {
     73 	set_control_byte(CONTROL_ADDR_BUILD(SEGMAP_BASE, va), sme);
     74 }
     75