1 /* $NetBSD: control.c,v 1.23 2008/04/28 20:23:38 martin 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 1.23 2008/04/28 20:23:38 martin 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