1 /* $NetBSD: idprom.c,v 1.25 2001/09/05 14:12:21 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/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 51 #include <sun3/sun3/machdep.h> 52 #ifdef _SUN3_ 53 #include <sun3/sun3/control.h> 54 #elif _SUN3X_ 55 #include <sun3/sun3x/obio.h> 56 #endif 57 58 /* 59 * This structure is what this driver is all about. 60 * It is copied from the device early in startup. 61 */ 62 struct idprom identity_prom; 63 64 static int idprom_cksum __P((u_char *)); 65 static void idprom_get __P((u_char *)); 66 static int idprom_hostid __P((void)); 67 68 /* 69 * Copy the IDPROM contents, 70 * verify the checksum, 71 * set the hostid... 72 */ 73 void 74 idprom_init() 75 { 76 77 idprom_get((u_char *)&identity_prom); 78 if (idprom_cksum((u_char *) &identity_prom)) 79 printf("idprom: bad checksum\n"); 80 if (identity_prom.idp_format < 1) 81 printf("idprom: bad version\n"); 82 83 cpu_machine_id = identity_prom.idp_machtype; 84 hostid = idprom_hostid(); 85 } 86 87 static int 88 idprom_cksum(p) 89 u_char *p; 90 { 91 int len, x; 92 93 len = IDPROM_CKSUM_SIZE; 94 x = 0; /* xor of data */ 95 do x ^= *p++; 96 while (--len > 0); 97 return (x); 98 } 99 100 static int 101 idprom_hostid() 102 { 103 struct idprom *idp; 104 union { 105 long l; 106 char c[4]; 107 } hid; 108 109 /* 110 * Construct the hostid from the idprom contents. 111 * This appears to be the way SunOS does it. 112 */ 113 idp = &identity_prom; 114 hid.c[0] = idp->idp_machtype; 115 hid.c[1] = idp->idp_serialnum[0]; 116 hid.c[2] = idp->idp_serialnum[1]; 117 hid.c[3] = idp->idp_serialnum[2]; 118 return (hid.l); 119 } 120 121 void 122 idprom_etheraddr(eaddrp) 123 u_char *eaddrp; 124 { 125 126 memcpy(eaddrp, identity_prom.idp_etheraddr, 6); 127 } 128 129 /* 130 * Machine specific stuff follows. 131 */ 132 133 #ifdef _SUN3_ 134 /* 135 * Copy the IDPROM to memory. 136 * 137 * On the Sun3, this is called very early, 138 * because we need the cputype. 139 */ 140 static void 141 idprom_get(dst) 142 u_char *dst; 143 { 144 vaddr_t src; /* control space address */ 145 int len, x; 146 147 src = IDPROM_BASE; 148 len = IDPROM_SIZE; 149 do { 150 x = get_control_byte(src++); 151 *dst++ = x; 152 } while (--len > 0); 153 } 154 155 #endif /* SUN3 */ 156 #ifdef _SUN3X_ 157 #error "not yet merged" 158 #endif /* SUN3X */ 159