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
get_context(void)41 get_context(void)
42 {
43 return (get_control_byte(CONTEXT_REG) & CONTEXT_MASK);
44 }
45
46 void
set_context(int c)47 set_context(int c)
48 {
49 set_control_byte(CONTEXT_REG, (c & CONTEXT_MASK));
50 }
51
52 u_int
get_pte(vaddr_t va)53 get_pte(vaddr_t va)
54 {
55 return (get_control_word(CONTROL_ADDR_BUILD(PGMAP_BASE, va)));
56 }
57
58 void
set_pte(vaddr_t va,u_int pte)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
get_segmap(vaddr_t va)65 get_segmap(vaddr_t va)
66 {
67 return (get_control_byte(CONTROL_ADDR_BUILD(SEGMAP_BASE, va)));
68 }
69
70 void
set_segmap(vaddr_t va,int sme)71 set_segmap(vaddr_t va, int sme)
72 {
73 set_control_byte(CONTROL_ADDR_BUILD(SEGMAP_BASE, va), sme);
74 }
75