115 lines
3.4 KiB
C
115 lines
3.4 KiB
C
/* $NetBSD: control.c,v 1.17 1998/02/05 04:57:29 gwr Exp $ */
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/*-
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* Copyright (c) 1996 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Adam Glass and Gordon W. Ross.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <machine/pte.h>
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#include <sun3/sun3/control.h>
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int
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get_context()
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{
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return (get_control_byte(CONTEXT_REG) & CONTEXT_MASK);
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}
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void
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set_context(c)
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int c;
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{
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set_control_byte(CONTEXT_REG, (c & CONTEXT_MASK));
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}
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u_int
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get_pte(va)
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vm_offset_t va;
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{
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return (get_control_word(CONTROL_ADDR_BUILD(PGMAP_BASE, va)));
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}
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void
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set_pte(va, pte)
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vm_offset_t va;
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u_int pte;
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{
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set_control_word(CONTROL_ADDR_BUILD(PGMAP_BASE, va), pte);
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}
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int
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get_segmap(va)
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vm_offset_t va;
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{
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return (get_control_byte(CONTROL_ADDR_BUILD(SEGMAP_BASE, va)));
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}
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void set_segmap(va, sme)
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vm_offset_t va;
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int sme;
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{
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set_control_byte(CONTROL_ADDR_BUILD(SEGMAP_BASE, va), sme);
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}
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/*
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* Set a segmap entry in all contexts.
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* (i.e. somewhere in kernel space.)
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* XXX - Should optimize: "(get|set)_control_(word|byte)"
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* calls so this does save/restore of sfc/dfc only once!
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*/
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void
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set_segmap_allctx(va, sme)
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vm_offset_t va;
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int sme; /* segmap entry */
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{
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vm_offset_t ctrladdr;
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register int ctx, oldctx;
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/* Inline get_context() */
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oldctx = get_control_byte(CONTEXT_REG);
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oldctx &= CONTEXT_MASK;
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ctrladdr = CONTROL_ADDR_BUILD(SEGMAP_BASE, va);
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for (ctx = 0; ctx < CONTEXT_NUM; ctx++) {
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/* Inlined set_context() */
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set_control_byte(CONTEXT_REG, ctx);
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/* Inlined set_segmap() */
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set_control_byte(ctrladdr, sme);
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}
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/* Inlined set_context(ctx); */
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set_control_byte(CONTEXT_REG, oldctx);
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}
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