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idprom.c revision 1.1.1.1 
      1 /*	$NetBSD: idprom.c,v 1.1.1.1 1997/01/14 20:57:02 gwr 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 /*
     40  * Machine ID PROM - system type and serial number
     41  */
     42 
     43 #include <sys/param.h>
     44 #include <sys/systm.h>
     45 #include <sys/device.h>
     46 #include <sys/kernel.h>
     47 
     48 #include <machine/autoconf.h>
     49 #include <machine/idprom.h>
     50 #include <machine/obio.h>
     51 #include <machine/mon.h>
     52 
     53 /*
     54  * This structure is what this driver is all about.
     55  * It is copied from the device early in startup.
     56  */
     57 struct idprom identity_prom;
     58 static char *idprom_va;
     59 
     60 /*
     61  * This is called very early during startup to
     62  * get a copy of the idprom from control space.
     63  */
     64 void
     65 idprom_init()
     66 {
     67 	struct idprom *idp;
     68 	char *src, *dst;
     69 	int len, x, xorsum;
     70 	union {
     71 		long l;
     72 		char c[4];
     73 	} hid;
     74 
     75 	idprom_va = obio_find_mapping(OBIO_IDPROM2, sizeof(struct idprom));
     76 
     77 	idp = &identity_prom;
     78 	dst = (char*)idp;
     79 	src = (char*)idprom_va;
     80 	len = IDPROM_SIZE;
     81 	xorsum = 0;	/* calculated as xor of data */
     82 
     83 	do {
     84 		x = *src++;
     85 		*dst++ = x;
     86 		xorsum ^= x;
     87 	} while (--len > 0);
     88 
     89 	if (xorsum != 0) {
     90 		mon_printf("idprom_fetch: bad checksum=%d\n", xorsum);
     91 		mon_exit_to_mon();
     92 	}
     93 	if (idp->idp_format < 1) {
     94 		mon_printf("idprom_fetch: bad version=%d\n", idp->idp_format);
     95 		mon_exit_to_mon();
     96 	}
     97 
     98 	/*
     99 	 * Construct the hostid from the idprom contents.
    100 	 * This appears to be the way SunOS does it.
    101 	 */
    102 	hid.c[0] = idp->idp_machtype;
    103 	hid.c[1] = idp->idp_serialnum[0];
    104 	hid.c[2] = idp->idp_serialnum[1];
    105 	hid.c[3] = idp->idp_serialnum[2];
    106 	hostid = hid.l;
    107 }
    108 
    109 void idprom_etheraddr(eaddrp)
    110 	u_char *eaddrp;
    111 {
    112 	u_char *src, *dst;
    113 	int len = 6;
    114 
    115 	src = identity_prom.idp_etheraddr;
    116 	dst = eaddrp;
    117 
    118 	do *dst++ = *src++;
    119 	while (--len > 0);
    120 }
    121