288 lines
7.0 KiB
C
288 lines
7.0 KiB
C
/* $NetBSD: sun3.c,v 1.2 1998/02/05 04:57:16 gwr Exp $ */
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/*-
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* Copyright (c) 1998 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 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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/*
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* Standalone functions specific to the Sun3.
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*/
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#define _SUN3_ XXX
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/* Need to avoid conflicts on these: */
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#define get_pte sun3_get_pte
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#define set_pte sun3_set_pte
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#define get_segmap sun3_get_segmap
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#define set_segmap sun3_set_segmap
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#include <sys/param.h>
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#include <machine/mon.h>
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#include <machine/pte.h>
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#include <arch/sun3/sun3/control.h>
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#include <arch/sun3/sun3/vme.h>
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#include <stand.h>
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#include "libsa.h"
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#include "dvma.h"
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#include "saio.h" /* enum MAPTYPES */
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#define OBIO_MASK 0xFFFFFF
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char * dvma3_alloc __P((int len));
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void dvma3_free __P((char *dvma, int len));
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char * dvma3_mapin __P((char *pkt, int len));
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void dvma3_mapout __P((char *dmabuf, int len));
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char * dev3_mapin __P((int type, u_long addr, int len));
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struct mapinfo {
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int maptype;
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int pgtype;
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u_int base;
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u_int mask;
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};
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struct mapinfo
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sun3_mapinfo[MAP__NTYPES] = {
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/* On-board memory, I/O */
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{ MAP_MAINMEM, PGT_OBMEM, 0, ~0 },
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{ MAP_OBIO, PGT_OBIO, 0, OBIO_MASK },
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/* Multibus adapter (A24,A16) */
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{ MAP_MBMEM, PGT_VME_D16, VME24_BASE, VME24_MASK },
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{ MAP_MBIO, PGT_VME_D16, VME16_BASE, VME16_MASK },
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/* VME A16 */
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{ MAP_VME16A16D, PGT_VME_D16, VME16_BASE, VME16_MASK },
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{ MAP_VME16A32D, PGT_VME_D32, VME16_BASE, VME16_MASK },
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/* VME A24 */
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{ MAP_VME24A16D, PGT_VME_D16, VME24_BASE, VME24_MASK },
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{ MAP_VME24A32D, PGT_VME_D32, VME24_BASE, VME24_MASK },
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/* VME A32 */
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{ MAP_VME32A16D, PGT_VME_D16, VME32_BASE, VME32_MASK },
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{ MAP_VME32A32D, PGT_VME_D32, VME32_BASE, VME32_MASK },
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};
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/* The virtual address we will use for PROM device mappings. */
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int sun3_devmap = SUN3_MONSHORTSEG;
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char *
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dev3_mapin(maptype, physaddr, length)
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int maptype;
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u_long physaddr;
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int length;
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{
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u_int i, pa, pte, pgva, va;
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if ((sun3_devmap + length) > SUN3_MONSHORTPAGE)
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panic("dev3_mapin: length=%d\n", length);
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for (i = 0; i < MAP__NTYPES; i++)
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if (sun3_mapinfo[i].maptype == maptype)
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goto found;
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panic("dev3_mapin: bad maptype");
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found:
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if (physaddr & ~(sun3_mapinfo[i].mask))
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panic("dev3_mapin: bad address");
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pa = sun3_mapinfo[i].base += physaddr;
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pte = PA_PGNUM(pa) | PG_PERM |
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sun3_mapinfo[i].pgtype;
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va = pgva = sun3_devmap;
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do {
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set_pte(pgva, pte);
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pgva += NBPG;
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pte += 1;
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length -= NBPG;
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} while (length > 0);
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sun3_devmap = pgva;
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va += (physaddr & PGOFSET);
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#ifdef DEBUG_PROM
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if (debug)
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printf("dev3_mapin: va=0x%x pte=0x%x\n",
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va, get_pte(va));
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#endif
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return ((char*)va);
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}
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/*****************************************************************
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* DVMA support
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*/
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/*
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* The easiest way to deal with the need for DVMA mappings is to
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* create a DVMA alias mapping of the entire address range used by
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* the boot program. That way, dvma_mapin can just compute the
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* DVMA alias address, and dvma_mapout does nothing.
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*
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* Note that this assumes that standalone programs will do I/O
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* operations only within range (SA_MIN_VA .. SA_MAX_VA) checked.
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*/
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#define DVMA_BASE 0xFFf00000
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#define DVMA_MAPLEN 0xE0000 /* 1 MB - 128K (save MONSHORTSEG) */
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#define SA_MIN_VA 0x200000
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#define SA_MAX_VA (SA_MIN_VA + DVMA_MAPLEN)
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/* This points to the end of the free DVMA space. */
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u_int dvma3_end = DVMA_BASE + DVMA_MAPLEN;
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void
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dvma3_init()
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{
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int segva, dmava, sme;
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segva = SA_MIN_VA;
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dmava = DVMA_BASE;
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while (segva < SA_MAX_VA) {
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sme = get_segmap(segva);
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set_segmap(dmava, sme);
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segva += NBSG;
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dmava += NBSG;
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}
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}
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/* Convert a local address to a DVMA address. */
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char *
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dvma3_mapin(char *addr, int len)
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{
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int va = (int)addr;
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/* Make sure the address is in the DVMA map. */
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if ((va < SA_MIN_VA) || (va >= SA_MAX_VA))
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panic("dvma3_mapin");
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va -= SA_MIN_VA;
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va += DVMA_BASE;
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return ((char *) va);
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}
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/* Destroy a DVMA address alias. */
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void
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dvma3_mapout(char *addr, int len)
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{
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int va = (int)addr;
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/* Make sure the address is in the DVMA map. */
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if ((va < DVMA_BASE) || (va >= (DVMA_BASE + DVMA_MAPLEN)))
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panic("dvma3_mapout");
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}
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char *
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dvma3_alloc(int len)
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{
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len = m68k_round_page(len);
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dvma3_end -= len;
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return((char*)dvma3_end);
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}
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void
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dvma3_free(char *dvma, int len)
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{
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/* not worth the trouble */
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}
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/*****************************************************************
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* Control space stuff...
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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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va = CONTROL_ADDR_BUILD(PGMAP_BASE, va);
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return (get_control_word(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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va = CONTROL_ADDR_BUILD(PGMAP_BASE, va);
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set_control_word(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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va = CONTROL_ADDR_BUILD(SEGMAP_BASE, va);
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return (get_control_byte(va));
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}
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void
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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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va = CONTROL_ADDR_BUILD(SEGMAP_BASE, va);
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set_control_byte(va, sme);
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}
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void
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sun3_etheraddr(u_char *ea)
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{
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vm_offset_t ca; /* control space address */
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for (ca = 2; ca < 8; ca++)
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*ea++ = get_control_byte(ca);
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}
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/*****************************************************************
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* Init our function pointers, etc.
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*/
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void
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sun3_init()
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{
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/* Set the function pointers. */
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dev_mapin_p = dev3_mapin;
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dvma_alloc_p = dvma3_alloc;
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dvma_free_p = dvma3_free;
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dvma_mapin_p = dvma3_mapin;
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dvma_mapout_p = dvma3_mapout;
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/* Prepare DVMA segment. */
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dvma3_init();
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}
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