1 /* $NetBSD: amiga.c,v 1.4 2005/06/02 05:10:22 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Michael Hitch. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Luke Mewburn of Wasabi Systems. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the NetBSD 24 * Foundation, Inc. and its contributors. 25 * 4. Neither the name of The NetBSD Foundation nor the names of its 26 * contributors may be used to endorse or promote products derived 27 * from this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 33 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 39 * POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42 #if HAVE_NBTOOL_CONFIG_H 43 #include "nbtool_config.h" 44 #endif 45 46 #include <sys/cdefs.h> 47 #if defined(__RCSID) && !defined(__lint) 48 __RCSID("$NetBSD: amiga.c,v 1.4 2005/06/02 05:10:22 lukem Exp $"); 49 #endif /* !__lint */ 50 51 #include <sys/param.h> 52 #include <sys/stat.h> 53 54 #include <assert.h> 55 #include <err.h> 56 #include <stddef.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <unistd.h> 60 #include <string.h> 61 62 #include "installboot.h" 63 64 /* XXX Must be kept in sync with bbstart.s! */ 65 #define CMDLN_LOC 0x10 66 #define CMDLN_LEN 0x20 67 68 #define CHKSUMOFFS 1 69 70 u_int32_t chksum(u_int32_t *, int); 71 72 int amiga_setboot(ib_params *); 73 int amiga_clearboot(ib_params *); 74 75 int 76 amiga_clearboot(ib_params *params) 77 { 78 return 0; 79 } 80 81 int 82 amiga_setboot(ib_params *params) 83 { 84 int retval; 85 ssize_t rv; 86 char *dline; 87 int sumlen; 88 u_int32_t sum2, sum16; 89 90 struct stat bootstrapsb; 91 92 u_int32_t block[128*16]; 93 94 retval = 0; 95 if (fstat(params->s1fd, &bootstrapsb) == -1) { 96 warn("Examining `%s'", params->stage1); 97 goto done; 98 } 99 if (!S_ISREG(bootstrapsb.st_mode)) { 100 warnx("`%s' must be a regular file", params->stage1); 101 goto done; 102 } 103 104 rv = pread(params->s1fd, &block, sizeof(block), 0); 105 if (rv == -1) { 106 warn("Reading `%s'", params->stage1); 107 goto done; 108 } else if (rv != sizeof(block)) { 109 warnx("Reading `%s': short read", params->stage1); 110 goto done; 111 } 112 113 /* XXX the choices should not be hardcoded */ 114 115 sum2 = chksum(block, 1024/4); 116 sum16 = chksum(block, 8192/4); 117 118 if (sum16 == 0xffffffff) { 119 sumlen = 8192/4; 120 } else if (sum2 == 0xffffffff) { 121 sumlen = 1024/4; 122 } else { 123 errx(1, "%s: wrong checksum", params->stage1); 124 /* NOTREACHED */ 125 } 126 127 if (sum2 == sum16) { 128 warnx("eek - both sums are the same"); 129 } 130 131 if (params->flags & IB_COMMAND) { 132 dline = (char *)&(block[CMDLN_LOC/4]); 133 /* XXX keep the default default line in sync with bbstart.s */ 134 if (strcmp(dline, "netbsd -ASn2") != 0) { 135 errx(1, "Old bootblock version? Can't change command line."); 136 } 137 (void)strncpy(dline, params->command, CMDLN_LEN-1); 138 139 block[1] = 0; 140 block[1] = 0xffffffff - chksum(block, sumlen); 141 } 142 143 if (params->flags & IB_NOWRITE) { 144 retval = 1; 145 goto done; 146 } 147 148 if (params->flags & IB_VERBOSE) 149 printf("Writing boot block\n"); 150 rv = pwrite(params->fsfd, &block, sizeof(block), 0); 151 if (rv == -1) { 152 warn("Writing `%s'", params->filesystem); 153 goto done; 154 } else if (rv != sizeof(block)) { 155 warnx("Writing `%s': short write", params->filesystem); 156 goto done; 157 } else { 158 retval = 1; 159 } 160 161 done: 162 return (retval); 163 } 164 165 u_int32_t 166 chksum(block, size) 167 u_int32_t *block; 168 int size; 169 { 170 u_int32_t sum, lastsum; 171 int i; 172 173 sum = 0; 174 175 for (i=0; i<size; i++) { 176 lastsum = sum; 177 sum += htobe32(block[i]); 178 if (sum < lastsum) 179 ++sum; 180 } 181 182 return sum; 183 } 184