sys/arch/sun3/sun3x/idprom.c

   1 /*      $NetBSD: idprom.c,v 1.14 2007/03/04 06:00:55 christos 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 1.14 2007/03/04 06:00:55 christos 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 */