1 /* $NetBSD: amiga.c,v 1.3 2004/06/20 22:20:17 jmc 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 1.3 2004/06/20 22:20:17 jmc 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 if (fstat(params->s1fd, &bootstrapsb) == -1) { 95 warn("Examining `%s'", params->stage1); 96 goto done; 97 } 98 if (!S_ISREG(bootstrapsb.st_mode)) { 99 warnx("`%s' must be a regular file", params->stage1); 100 goto done; 101 } 102 103 rv = pread(params->s1fd, &block, sizeof(block), 0); 104 if (rv == -1) { 105 warn("Reading `%s'", params->stage1); 106 goto done; 107 } else if (rv != sizeof(block)) { 108 warnx("Reading `%s': short read", params->stage1); 109 goto done; 110 } 111 112 /* XXX the choices should not be hardcoded */ 113 114 sum2 = chksum(block, 1024/4); 115 sum16 = chksum(block, 8192/4); 116 117 if (sum16 == 0xffffffff) { 118 sumlen = 8192/4; 119 } else if (sum2 == 0xffffffff) { 120 sumlen = 1024/4; 121 } else { 122 errx(1, "%s: wrong checksum", params->stage1); 123 /* NOTREACHED */ 124 } 125 126 if (sum2 == sum16) { 127 warnx("eek - both sums are the same"); 128 } 129 130 if (params->flags & IB_COMMAND) { 131 dline = (char *)&(block[CMDLN_LOC/4]); 132 /* XXX keep the default default line in sync with bbstart.s */ 133 if (strcmp(dline, "netbsd -ASn2") != 0) { 134 errx(1, "Old bootblock version? Can't change command line."); 135 } 136 (void)strncpy(dline, params->command, CMDLN_LEN-1); 137 138 block[1] = 0; 139 block[1] = 0xffffffff - chksum(block, sumlen); 140 } 141 142 if (params->flags & IB_NOWRITE) { 143 retval = 1; 144 goto done; 145 } 146 147 if (params->flags & IB_VERBOSE) 148 printf("Writing boot block\n"); 149 rv = pwrite(params->fsfd, &block, sizeof(block), 0); 150 if (rv == -1) { 151 warn("Writing `%s'", params->filesystem); 152 goto done; 153 } else if (rv != sizeof(block)) { 154 warnx("Writing `%s': short write", params->filesystem); 155 goto done; 156 } else { 157 retval = 1; 158 } 159 160 done: 161 return (retval); 162 } 163 164 u_int32_t 165 chksum(block, size) 166 u_int32_t *block; 167 int size; 168 { 169 u_int32_t sum, lastsum; 170 int i; 171 172 sum = 0; 173 174 for (i=0; i<size; i++) { 175 lastsum = sum; 176 sum += htobe32(block[i]); 177 if (sum < lastsum) 178 ++sum; 179 } 180 181 return sum; 182 } 183