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      1 /*	$NetBSD: idprom.c,v 1.30 2013/09/07 15:56:11 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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Machine ID PROM - system type and serial number
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 __KERNEL_RCSID(0, "$NetBSD: idprom.c,v 1.30 2013/09/07 15:56:11 tsutsui Exp $");
     38 
     39 #include <sys/param.h>
     40 #include <sys/systm.h>
     41 #include <sys/device.h>
     42 #include <sys/kernel.h>
     43 
     44 #include <machine/autoconf.h>
     45 #include <machine/idprom.h>
     46 
     47 #include <sun3/sun3/machdep.h>
     48 #ifdef _SUN3_
     49 #include <sun3/sun3/control.h>
     50 #elif _SUN3X_
     51 #include <sun3/sun3x/obio.h>
     52 #endif
     53 
     54 /*
     55  * This structure is what this driver is all about.
     56  * It is copied from the device early in startup.
     57  */
     58 struct idprom identity_prom;
     59 
     60 static int idprom_cksum(u_char *);
     61 static void idprom_get(u_char *);
     62 static int idprom_hostid(void);
     63 
     64 /*
     65  * Copy the IDPROM contents,
     66  * verify the checksum,
     67  * set the hostid...
     68  */
     69 void
     70 idprom_init(void)
     71 {
     72 
     73 	idprom_get((u_char *)&identity_prom);
     74 	if (idprom_cksum((u_char *) &identity_prom))
     75 		printf("idprom: bad checksum\n");
     76 	if (identity_prom.idp_format < 1)
     77 		printf("idprom: bad version\n");
     78 
     79 	cpu_machine_id = identity_prom.idp_machtype;
     80 	hostid = idprom_hostid();
     81 }
     82 
     83 static int
     84 idprom_cksum(u_char *p)
     85 {
     86 	int len, x;
     87 
     88 	len = IDPROM_CKSUM_SIZE;
     89 	x = 0;	/* xor of data */
     90 	do x ^= *p++;
     91 	while (--len > 0);
     92 	return (x);
     93 }
     94 
     95 static int
     96 idprom_hostid(void)
     97 {
     98 	struct idprom *idp;
     99 	union {
    100 		long l;
    101 		char c[4];
    102 	} hid;
    103 
    104 	/*
    105 	 * Construct the hostid from the idprom contents.
    106 	 * This appears to be the way SunOS does it.
    107 	 */
    108 	idp = &identity_prom;
    109 	hid.c[0] = idp->idp_machtype;
    110 	hid.c[1] = idp->idp_serialnum[0];
    111 	hid.c[2] = idp->idp_serialnum[1];
    112 	hid.c[3] = idp->idp_serialnum[2];
    113 	return (hid.l);
    114 }
    115 
    116 void
    117 idprom_etheraddr(u_char *eaddrp)
    118 {
    119 
    120 	memcpy(eaddrp, identity_prom.idp_etheraddr, 6);
    121 }
    122 
    123 /*
    124  * Machine specific stuff follows.
    125  */
    126 
    127 #ifdef _SUN3_
    128 /*
    129  * Copy the IDPROM to memory.
    130  *
    131  * On the Sun3, this is called very early,
    132  * because we need the cputype.
    133  */
    134 static void
    135 idprom_get(u_char *dst)
    136 {
    137 	vaddr_t src;	/* control space address */
    138 	int len, x;
    139 
    140 	src = IDPROM_BASE;
    141 	len = IDPROM_SIZE;
    142 	do {
    143 		x = get_control_byte(src++);
    144 		*dst++ = x;
    145 	} while (--len > 0);
    146 }
    147 
    148 #endif /* SUN3 */
    149 #ifdef _SUN3X_
    150 #error "not yet merged"
    151 #endif /* SUN3X */
    152