130 lines
3.7 KiB
C
130 lines
3.7 KiB
C
/* $NetBSD: idprom.c,v 1.5 1997/10/16 15:56:02 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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/*
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* Machine ID PROM - system type and serial number
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/kernel.h>
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#include <machine/autoconf.h>
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#include <machine/idprom.h>
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#include <machine/obio.h>
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#include <machine/machdep.h>
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#include <machine/mon.h>
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/*
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* This structure is what this driver is all about.
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* It is copied from the device early in startup.
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*/
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struct idprom identity_prom;
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static int idprom_hostid __P((void));
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/*
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* Find the IDPROM and copy it to memory.
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* This is called early during startup,
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* but late enough so peek_byte() works.
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* Called by machdep.c:identifycpu()
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*/
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void
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idprom_init()
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{
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u_char *src, *dst;
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caddr_t va;
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int len, x, xorsum;
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/* First, probe for a separate IDPROM (3/470). */
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va = obio_find_mapping(OBIO_IDPROM1, IDPROM_SIZE);
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if (peek_byte(va) == -1) {
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/* IDPROM is in the EEPROM */
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va = obio_find_mapping(OBIO_IDPROM2, IDPROM_SIZE);
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}
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/* Copy the IDPROM contents and do the checksum. */
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dst = (u_char *) &identity_prom;
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src = (u_char *) va;
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len = IDPROM_SIZE;
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xorsum = 0; /* calculated as xor of data */
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do {
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x = *src++;
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*dst++ = x;
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xorsum ^= x;
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} while (--len > 0);
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if (xorsum != 0)
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printf("idprom: bad checksum\n");
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if (identity_prom.idp_format < 1)
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printf("idprom: bad version\n");
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hostid = idprom_hostid();
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}
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static int
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idprom_hostid()
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{
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struct idprom *idp;
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union {
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long l;
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char c[4];
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} hid;
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/*
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* Construct the hostid from the idprom contents.
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* This appears to be the way SunOS does it.
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*/
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idp = &identity_prom;
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hid.c[0] = idp->idp_machtype;
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hid.c[1] = idp->idp_serialnum[0];
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hid.c[2] = idp->idp_serialnum[1];
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hid.c[3] = idp->idp_serialnum[2];
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return (hid.l);
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}
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void
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idprom_etheraddr(eaddrp)
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u_char *eaddrp;
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{
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bcopy(identity_prom.idp_etheraddr, eaddrp, 6);
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}
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