amiga.c revision 1.5
1 /* $NetBSD: amiga.c,v 1.5 2006/02/18 10:08:07 dsl 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 1.5 2006/02/18 10:08:07 dsl 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 static int amiga_setboot(ib_params *); 73 74 struct ib_mach ib_mach_amiga = 75 { "amiga", amiga_setboot, no_clearboot, no_editboot, 76 IB_STAGE1START | IB_STAGE2START | IB_COMMAND }; 77 78 static int 79 amiga_setboot(ib_params *params) 80 { 81 int retval; 82 ssize_t rv; 83 char *dline; 84 int sumlen; 85 u_int32_t sum2, sum16; 86 87 struct stat bootstrapsb; 88 89 u_int32_t block[128*16]; 90 91 retval = 0; 92 if (fstat(params->s1fd, &bootstrapsb) == -1) { 93 warn("Examining `%s'", params->stage1); 94 goto done; 95 } 96 if (!S_ISREG(bootstrapsb.st_mode)) { 97 warnx("`%s' must be a regular file", params->stage1); 98 goto done; 99 } 100 101 rv = pread(params->s1fd, &block, sizeof(block), 0); 102 if (rv == -1) { 103 warn("Reading `%s'", params->stage1); 104 goto done; 105 } else if (rv != sizeof(block)) { 106 warnx("Reading `%s': short read", params->stage1); 107 goto done; 108 } 109 110 /* XXX the choices should not be hardcoded */ 111 112 sum2 = chksum(block, 1024/4); 113 sum16 = chksum(block, 8192/4); 114 115 if (sum16 == 0xffffffff) { 116 sumlen = 8192/4; 117 } else if (sum2 == 0xffffffff) { 118 sumlen = 1024/4; 119 } else { 120 errx(1, "%s: wrong checksum", params->stage1); 121 /* NOTREACHED */ 122 } 123 124 if (sum2 == sum16) { 125 warnx("eek - both sums are the same"); 126 } 127 128 if (params->flags & IB_COMMAND) { 129 dline = (char *)&(block[CMDLN_LOC/4]); 130 /* XXX keep the default default line in sync with bbstart.s */ 131 if (strcmp(dline, "netbsd -ASn2") != 0) { 132 errx(1, "Old bootblock version? Can't change command line."); 133 } 134 (void)strncpy(dline, params->command, CMDLN_LEN-1); 135 136 block[1] = 0; 137 block[1] = 0xffffffff - chksum(block, sumlen); 138 } 139 140 if (params->flags & IB_NOWRITE) { 141 retval = 1; 142 goto done; 143 } 144 145 if (params->flags & IB_VERBOSE) 146 printf("Writing boot block\n"); 147 rv = pwrite(params->fsfd, &block, sizeof(block), 0); 148 if (rv == -1) { 149 warn("Writing `%s'", params->filesystem); 150 goto done; 151 } else if (rv != sizeof(block)) { 152 warnx("Writing `%s': short write", params->filesystem); 153 goto done; 154 } else { 155 retval = 1; 156 } 157 158 done: 159 return (retval); 160 } 161 162 u_int32_t 163 chksum(block, size) 164 u_int32_t *block; 165 int size; 166 { 167 u_int32_t sum, lastsum; 168 int i; 169 170 sum = 0; 171 172 for (i=0; i<size; i++) { 173 lastsum = sum; 174 sum += htobe32(block[i]); 175 if (sum < lastsum) 176 ++sum; 177 } 178 179 return sum; 180 } 181
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