amiga.c revision 1.1
1 /* $NetBSD: amiga.c,v 1.1 2003/01/15 06:33:13 mhitch 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 #include <sys/cdefs.h> 43 #if defined(__RCSID) && !defined(__lint) 44 __RCSID("$NetBSD: amiga.c,v 1.1 2003/01/15 06:33:13 mhitch Exp $"); 45 #endif /* !__lint */ 46 47 #include <sys/param.h> 48 #include <sys/stat.h> 49 50 #include <assert.h> 51 #include <err.h> 52 #include <stddef.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <unistd.h> 56 #include <string.h> 57 58 #include "installboot.h" 59 60 /* XXX Must be kept in sync with bbstart.s! */ 61 #define CMDLN_LOC 0x10 62 #define CMDLN_LEN 0x20 63 64 char command[CMDLN_LEN]; 65 66 #define CHKSUMOFFS 1 67 68 u_int32_t chksum(u_int32_t *, int); 69 70 int amiga_parseopt(ib_params *, const char *); 71 int amiga_setboot(ib_params *); 72 int amiga_clearboot(ib_params *); 73 74 int 75 amiga_parseopt(ib_params *params, const char *option) 76 { 77 78 if (strncmp("command=", option, strlen("command=")) == 0) { 79 strncpy(command, option + strlen("command="), CMDLN_LEN); 80 params->flags |= IB_COMMAND; 81 return (1); 82 } 83 84 warnx("Unknown -o option `%s'", option); 85 return (0); 86 } 87 88 int 89 amiga_clearboot(ib_params *params) 90 { 91 return 0; 92 } 93 94 int 95 amiga_setboot(ib_params *params) 96 { 97 int retval; 98 ssize_t rv; 99 char *dline; 100 int sumlen; 101 u_int32_t sum2, sum16; 102 103 struct stat bootstrapsb; 104 105 u_int32_t block[128*16]; 106 107 if (fstat(params->s1fd, &bootstrapsb) == -1) { 108 warn("Examining `%s'", params->stage1); 109 goto done; 110 } 111 if (!S_ISREG(bootstrapsb.st_mode)) { 112 warnx("`%s' must be a regular file", params->stage1); 113 goto done; 114 } 115 116 rv = pread(params->s1fd, &block, sizeof(block), 0); 117 if (rv == -1) { 118 warn("Reading `%s'", params->stage1); 119 goto done; 120 } else if (rv != sizeof(block)) { 121 warnx("Reading `%s': short read", params->stage1); 122 goto done; 123 } 124 125 /* XXX the choices should not be hardcoded */ 126 127 sum2 = chksum(block, 1024/4); 128 sum16 = chksum(block, 8192/4); 129 130 if (sum16 == 0xffffffff) { 131 sumlen = 8192/4; 132 } else if (sum2 == 0xffffffff) { 133 sumlen = 1024/4; 134 } else { 135 errx(1, "%s: wrong checksum", params->stage1); 136 /* NOTREACHED */ 137 } 138 139 if (sum2 == sum16) { 140 warnx("eek - both sums are the same"); 141 } 142 143 if (params->flags & IB_COMMAND) { 144 dline = (char *)&(block[CMDLN_LOC/4]); 145 /* XXX keep the default default line in sync with bbstart.s */ 146 if (strcmp(dline, "netbsd -ASn2") != 0) { 147 errx(1, "Old bootblock version? Can't change command line."); 148 } 149 (void)strncpy(dline, command, CMDLN_LEN-1); 150 151 block[1] = 0; 152 block[1] = 0xffffffff - chksum(block, sumlen); 153 } 154 155 if (params->flags & IB_NOWRITE) { 156 retval = 1; 157 goto done; 158 } 159 160 if (params->flags & IB_VERBOSE) 161 printf("Writing boot block\n"); 162 rv = pwrite(params->fsfd, &block, sizeof(block), 0); 163 if (rv == -1) { 164 warn("Writing `%s'", params->filesystem); 165 goto done; 166 } else if (rv != sizeof(block)) { 167 warnx("Writing `%s': short write", params->filesystem); 168 goto done; 169 } else { 170 retval = 1; 171 } 172 173 done: 174 return (retval); 175 } 176 177 u_int32_t 178 chksum(block, size) 179 u_int32_t *block; 180 int size; 181 { 182 u_int32_t sum, lastsum; 183 int i; 184 185 sum = 0; 186 187 for (i=0; i<size; i++) { 188 lastsum = sum; 189 sum += htobe32(block[i]); 190 if (sum < lastsum) 191 ++sum; 192 } 193 194 return sum; 195 } 196
Indexes created Mon Sep 22 13:09:51 GMT 2025