1 /* $NetBSD: idprom.c,v 1.7 2008/04/28 20:23:37 martin 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, Gordon W. Ross, and Matthew Fredette. 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 1.7 2008/04/28 20:23:37 martin 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 <sun2/sun2/machdep.h> 50 #include <sun2/sun2/control.h> 51 52 /* 53 * This structure is what this driver is all about. 54 * It is copied from the device early in startup. 55 */ 56 struct idprom identity_prom; 57 58 static int idprom_cksum(u_char *); 59 static void idprom_get(u_char *); 60 static int idprom_hostid(void); 61 62 /* 63 * Copy the IDPROM contents, 64 * verify the checksum, 65 * set the hostid... 66 */ 67 void 68 idprom_init(void) 69 { 70 71 idprom_get((u_char *)&identity_prom); 72 if (idprom_cksum((u_char *) &identity_prom)) 73 printf("idprom: bad checksum\n"); 74 if (identity_prom.idp_format < 1) 75 printf("idprom: bad version\n"); 76 77 cpu_machine_id = identity_prom.idp_machtype; 78 hostid = idprom_hostid(); 79 } 80 81 static int 82 idprom_cksum(u_char *p) 83 { 84 int len, x; 85 86 len = IDPROM_CKSUM_SIZE; 87 x = 0; /* xor of data */ 88 do x ^= *p++; 89 while (--len > 0); 90 return (x); 91 } 92 93 static int 94 idprom_hostid(void) 95 { 96 struct idprom *idp; 97 union { 98 long l; 99 char c[4]; 100 } hid; 101 102 /* 103 * Construct the hostid from the idprom contents. 104 * This appears to be the way SunOS does it. 105 */ 106 idp = &identity_prom; 107 hid.c[0] = idp->idp_machtype; 108 hid.c[1] = idp->idp_serialnum[0]; 109 hid.c[2] = idp->idp_serialnum[1]; 110 hid.c[3] = idp->idp_serialnum[2]; 111 return (hid.l); 112 } 113 114 void 115 idprom_etheraddr(u_char *eaddrp) 116 { 117 118 memcpy(eaddrp, identity_prom.idp_etheraddr, 6); 119 } 120 121 /* 122 * Machine specific stuff follows. 123 */ 124 125 /* 126 * Copy the IDPROM to memory. 127 * 128 * On the Sun2, this is called very early, 129 * because we need the cputype. 130 */ 131 static void 132 idprom_get(u_char *dst) 133 { 134 vaddr_t src; /* control space address */ 135 int len, x; 136 137 src = IDPROM_BASE; 138 len = IDPROM_SIZE; 139 do { 140 x = get_control_byte(src); 141 src += PAGE_SIZE; 142 *dst++ = x; 143 } while (--len > 0); 144 } 145 146