Home | History | Annotate | Line # | Download | only in sun3x 
      1 /*	$NetBSD: idprom.c,v 1.16 2013/09/06 17:43:19 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 1.16 2013/09/06 17:43:19 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 <uvm/uvm_extern.h>
     45 
     46 #include <machine/autoconf.h>
     47 #include <machine/idprom.h>
     48 
     49 #include <sun3/sun3/machdep.h>
     50 #ifdef _SUN3_
     51 #include <sun3/sun3/control.h>
     52 #elif _SUN3X_
     53 #include <sun3/sun3x/obio.h>
     54 #endif
     55 
     56 /*
     57  * This structure is what this driver is all about.
     58  * It is copied from the device early in startup.
     59  */
     60 struct idprom identity_prom;
     61 
     62 static int idprom_cksum(u_char *);
     63 static void idprom_get(u_char *);
     64 static int idprom_hostid(void);
     65 
     66 /*
     67  * Copy the IDPROM contents,
     68  * verify the checksum,
     69  * set the hostid...
     70  */
     71 void
     72 idprom_init(void)
     73 {
     74 
     75 	idprom_get((u_char *)&identity_prom);
     76 	if (idprom_cksum((u_char *) &identity_prom))
     77 		printf("idprom: bad checksum\n");
     78 	if (identity_prom.idp_format < 1)
     79 		printf("idprom: bad version\n");
     80 
     81 	cpu_machine_id = identity_prom.idp_machtype;
     82 	hostid = idprom_hostid();
     83 }
     84 
     85 static int
     86 idprom_cksum(u_char *p)
     87 {
     88 	int len, x;
     89 
     90 	len = IDPROM_CKSUM_SIZE;
     91 	x = 0;	/* xor of data */
     92 	do x ^= *p++;
     93 	while (--len > 0);
     94 	return (x);
     95 }
     96 
     97 static int
     98 idprom_hostid(void)
     99 {
    100 	struct idprom *idp;
    101 	union {
    102 		long l;
    103 		char c[4];
    104 	} hid;
    105 
    106 	/*
    107 	 * Construct the hostid from the idprom contents.
    108 	 * This appears to be the way SunOS does it.
    109 	 */
    110 	idp = &identity_prom;
    111 	hid.c[0] = idp->idp_machtype;
    112 	hid.c[1] = idp->idp_serialnum[0];
    113 	hid.c[2] = idp->idp_serialnum[1];
    114 	hid.c[3] = idp->idp_serialnum[2];
    115 	return (hid.l);
    116 }
    117 
    118 void
    119 idprom_etheraddr(u_char *eaddrp)
    120 {
    121 
    122 	memcpy(eaddrp, identity_prom.idp_etheraddr, 6);
    123 }
    124 
    125 /*
    126  * Machine specific stuff follows.
    127  */
    128 
    129 #ifdef _SUN3_
    130 #error "not yet merged"
    131 #endif /* SUN3 */
    132 #ifdef _SUN3X_
    133 /*
    134  * On the Sun3X, this is called early during startup,
    135  * but after trap table setup so peek_byte() works.
    136  * Called by machdep.c:identifycpu()
    137  */
    138 static void
    139 idprom_get(u_char *dst)
    140 {
    141 	u_char *src;
    142 	vaddr_t va;
    143 	int len;
    144 
    145 	/* First, probe for a separate IDPROM (3/470). */
    146 	find_prom_map(OBIO_IDPROM1, PMAP_OBIO, IDPROM_SIZE, &va);
    147 	if (peek_byte((void *)va) == -1) {
    148 		/* IDPROM is in the EEPROM */
    149 		find_prom_map(OBIO_IDPROM2, PMAP_OBIO, IDPROM_SIZE, &va);
    150 	}
    151 
    152 	/* Copy the IDPROM contents and do the checksum. */
    153 	src = (void *)va;
    154 	len = IDPROM_SIZE;
    155 	do {
    156 		*dst++ = *src++;
    157 	} while (--len > 0);
    158 }
    159 
    160 #endif /* SUN3X */
    161