1 /* $NetBSD: amiga.c,v 1.2 2003/04/15 14:22:14 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 #include <sys/cdefs.h> 43 #if defined(__RCSID) && !defined(__lint) 44 __RCSID("$NetBSD: amiga.c,v 1.2 2003/04/15 14:22:14 dsl 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 #define CHKSUMOFFS 1 65 66 u_int32_t chksum(u_int32_t *, int); 67 68 int amiga_setboot(ib_params *); 69 int amiga_clearboot(ib_params *); 70 71 int 72 amiga_clearboot(ib_params *params) 73 { 74 return 0; 75 } 76 77 int 78 amiga_setboot(ib_params *params) 79 { 80 int retval; 81 ssize_t rv; 82 char *dline; 83 int sumlen; 84 u_int32_t sum2, sum16; 85 86 struct stat bootstrapsb; 87 88 u_int32_t block[128*16]; 89 90 if (fstat(params->s1fd, &bootstrapsb) == -1) { 91 warn("Examining `%s'", params->stage1); 92 goto done; 93 } 94 if (!S_ISREG(bootstrapsb.st_mode)) { 95 warnx("`%s' must be a regular file", params->stage1); 96 goto done; 97 } 98 99 rv = pread(params->s1fd, &block, sizeof(block), 0); 100 if (rv == -1) { 101 warn("Reading `%s'", params->stage1); 102 goto done; 103 } else if (rv != sizeof(block)) { 104 warnx("Reading `%s': short read", params->stage1); 105 goto done; 106 } 107 108 /* XXX the choices should not be hardcoded */ 109 110 sum2 = chksum(block, 1024/4); 111 sum16 = chksum(block, 8192/4); 112 113 if (sum16 == 0xffffffff) { 114 sumlen = 8192/4; 115 } else if (sum2 == 0xffffffff) { 116 sumlen = 1024/4; 117 } else { 118 errx(1, "%s: wrong checksum", params->stage1); 119 /* NOTREACHED */ 120 } 121 122 if (sum2 == sum16) { 123 warnx("eek - both sums are the same"); 124 } 125 126 if (params->flags & IB_COMMAND) { 127 dline = (char *)&(block[CMDLN_LOC/4]); 128 /* XXX keep the default default line in sync with bbstart.s */ 129 if (strcmp(dline, "netbsd -ASn2") != 0) { 130 errx(1, "Old bootblock version? Can't change command line."); 131 } 132 (void)strncpy(dline, params->command, CMDLN_LEN-1); 133 134 block[1] = 0; 135 block[1] = 0xffffffff - chksum(block, sumlen); 136 } 137 138 if (params->flags & IB_NOWRITE) { 139 retval = 1; 140 goto done; 141 } 142 143 if (params->flags & IB_VERBOSE) 144 printf("Writing boot block\n"); 145 rv = pwrite(params->fsfd, &block, sizeof(block), 0); 146 if (rv == -1) { 147 warn("Writing `%s'", params->filesystem); 148 goto done; 149 } else if (rv != sizeof(block)) { 150 warnx("Writing `%s': short write", params->filesystem); 151 goto done; 152 } else { 153 retval = 1; 154 } 155 156 done: 157 return (retval); 158 } 159 160 u_int32_t 161 chksum(block, size) 162 u_int32_t *block; 163 int size; 164 { 165 u_int32_t sum, lastsum; 166 int i; 167 168 sum = 0; 169 170 for (i=0; i<size; i++) { 171 lastsum = sum; 172 sum += htobe32(block[i]); 173 if (sum < lastsum) 174 ++sum; 175 } 176 177 return sum; 178 } 179