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idprom.c revision 1.13 
      1 /*	$NetBSD: idprom.c,v 1.13 2006/10/03 13:02:32 tsutsui 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/cdefs.h>
     44 __KERNEL_RCSID(0, "$NetBSD: idprom.c,v 1.13 2006/10/03 13:02:32 tsutsui Exp $");
     45 
     46 #include <sys/param.h>
     47 #include <sys/systm.h>
     48 #include <sys/device.h>
     49 #include <sys/kernel.h>
     50 
     51 #include <uvm/uvm_extern.h>
     52 
     53 #include <machine/autoconf.h>
     54 #include <machine/idprom.h>
     55 
     56 #include <sun3/sun3/machdep.h>
     57 #ifdef _SUN3_
     58 #include <sun3/sun3/control.h>
     59 #elif _SUN3X_
     60 #include <sun3/sun3x/obio.h>
     61 #endif
     62 
     63 /*
     64  * This structure is what this driver is all about.
     65  * It is copied from the device early in startup.
     66  */
     67 struct idprom identity_prom;
     68 
     69 static int idprom_cksum(u_char *);
     70 static void idprom_get(u_char *);
     71 static int idprom_hostid(void);
     72 
     73 /*
     74  * Copy the IDPROM contents,
     75  * verify the checksum,
     76  * set the hostid...
     77  */
     78 void
     79 idprom_init(void)
     80 {
     81 
     82 	idprom_get((u_char *)&identity_prom);
     83 	if (idprom_cksum((u_char *) &identity_prom))
     84 		printf("idprom: bad checksum\n");
     85 	if (identity_prom.idp_format < 1)
     86 		printf("idprom: bad version\n");
     87 
     88 	cpu_machine_id = identity_prom.idp_machtype;
     89 	hostid = idprom_hostid();
     90 }
     91 
     92 static int
     93 idprom_cksum(u_char *p)
     94 {
     95 	int len, x;
     96 
     97 	len = IDPROM_CKSUM_SIZE;
     98 	x = 0;	/* xor of data */
     99 	do x ^= *p++;
    100 	while (--len > 0);
    101 	return (x);
    102 }
    103 
    104 static int
    105 idprom_hostid(void)
    106 {
    107 	struct idprom *idp;
    108 	union {
    109 		long l;
    110 		char c[4];
    111 	} hid;
    112 
    113 	/*
    114 	 * Construct the hostid from the idprom contents.
    115 	 * This appears to be the way SunOS does it.
    116 	 */
    117 	idp = &identity_prom;
    118 	hid.c[0] = idp->idp_machtype;
    119 	hid.c[1] = idp->idp_serialnum[0];
    120 	hid.c[2] = idp->idp_serialnum[1];
    121 	hid.c[3] = idp->idp_serialnum[2];
    122 	return (hid.l);
    123 }
    124 
    125 void
    126 idprom_etheraddr(u_char *eaddrp)
    127 {
    128 
    129 	memcpy(eaddrp, identity_prom.idp_etheraddr, 6);
    130 }
    131 
    132 /*
    133  * Machine specific stuff follows.
    134  */
    135 
    136 #ifdef _SUN3_
    137 #error "not yet merged"
    138 #endif /* SUN3 */
    139 #ifdef _SUN3X_
    140 /*
    141  * On the Sun3X, this is called early during startup,
    142  * but after trap table setup so peek_byte() works.
    143  * Called by machdep.c:identifycpu()
    144  */
    145 static void
    146 idprom_get(u_char *dst)
    147 {
    148 	u_char *src;
    149 	vaddr_t va;
    150 	int len;
    151 
    152 	/* First, probe for a separate IDPROM (3/470). */
    153 	find_prom_map(OBIO_IDPROM1, PMAP_OBIO, IDPROM_SIZE, &va);
    154 	if (peek_byte((caddr_t)va) == -1) {
    155 		/* IDPROM is in the EEPROM */
    156 		find_prom_map(OBIO_IDPROM2, PMAP_OBIO, IDPROM_SIZE, &va);
    157 	}
    158 
    159 	/* Copy the IDPROM contents and do the checksum. */
    160 	src = (void *)va;
    161 	len = IDPROM_SIZE;
    162 	do {
    163 		*dst++ = *src++;
    164 	} while (--len > 0);
    165 }
    166 
    167 #endif /* SUN3X */
    168