wrtvid.c revision 1.6
1 /* $NetBSD: wrtvid.c,v 1.6 2002/03/24 18:15:03 scw Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Steve C. Woodford. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/types.h> 40 #include <sys/stat.h> 41 #include <fcntl.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 46 /* mvme68k's boot block is 512 bytes long */ 47 #define SIZEOF_VID 0x200 48 49 /* The first field is effectively the vendor string, in this case NBSD */ 50 #define VID_ID_OFF 0x000 51 #define VID_ID "NBSD" 52 #define VID_ID_LEN 4 53 54 /* Start block for the 1st stage bootstrap code */ 55 #define VID_OSS_OFF 0x014 56 #define VID_OSS_TAPE 1 57 #define VID_OSS_DISK 2 58 59 /* Length, in 256-byte logical blocks, of the 1st stage bootstrap */ 60 #define VID_OSL_OFF 0x018 61 62 /* Start address of the bootstrap */ 63 #define VID_OSA_OFF 0x01e 64 #define VID_OSA 0x003f0000 65 66 /* Block number of config area */ 67 #define VID_CAS_OFF 0x093 68 #define VID_CAS 1 69 70 /* Length, in 256-byte logical blocks, of config area */ 71 #define VID_CAL_OFF 0x094 72 #define VID_CAL 1 73 74 /* Magic `MOTOROLA' string */ 75 #define VID_MOT_OFF 0x0f8 76 #define VID_MOT "MOTOROLA" 77 #define VID_MOT_LEN 8 78 79 /* Logical block size, in bytes */ 80 #define CFG_REC_OFF 0x10a 81 #define CFG_REC 0x100 82 83 /* Physical sector size, in bytes */ 84 #define CFG_PSM_OFF 0x11e 85 #define CFG_PSM 0x200 86 87 88 /* 89 * Write a big-endian 32-bit value at the specified address 90 */ 91 static void 92 write32(u_int8_t *vp, u_int32_t value) 93 { 94 *vp++ = (u_int8_t) ((value >> 24) & 0xff); 95 *vp++ = (u_int8_t) ((value >> 16) & 0xff); 96 *vp++ = (u_int8_t) ((value >> 8) & 0xff); 97 *vp = (u_int8_t) (value & 0xff); 98 } 99 100 /* 101 * Write a big-endian 16-bit value at the specified address 102 */ 103 static void 104 write16(u_int8_t *vp, u_int16_t value) 105 { 106 *vp++ = (u_int8_t) ((value >> 8) & 0xff); 107 *vp = (u_int8_t) (value & 0xff); 108 } 109 110 int 111 main(int argc, char **argv) 112 { 113 struct stat st; 114 u_int16_t len; 115 u_int8_t *vid; 116 char *fn; 117 int is_disk; 118 int fd; 119 120 if (argc != 2) { 121 usage: 122 fprintf(stderr, "%s: <bootsd|bootst>\n", argv[0]); 123 exit(1); 124 } 125 126 if (strcmp(argv[1], "bootsd") == 0) { 127 is_disk = 1; 128 fn = "sdboot"; 129 } else 130 if (strcmp(argv[1], "bootst") == 0) { 131 is_disk = 0; 132 fn = "stboot"; 133 } else 134 goto usage; 135 136 if (stat(argv[1], &st) < 0) { 137 perror(argv[1]); 138 exit(1); 139 } 140 141 /* How many 256-byte logical blocks (rounded up) */ 142 len = (u_int16_t) ((st.st_size + 255) / 256); 143 144 /* For tapes, round up to 8k */ 145 if (is_disk == 0) { 146 len += (8192 / 256) - 1; 147 len &= ~((8192 / 256) -1); 148 } 149 150 if ((vid = malloc(SIZEOF_VID)) == NULL) { 151 perror(argv[0]); 152 exit(1); 153 } 154 155 /* Generate the VID and CFG data */ 156 memset(vid, 0, SIZEOF_VID); 157 memcpy(&vid[VID_ID_OFF], VID_ID, VID_ID_LEN); 158 write32(&vid[VID_OSS_OFF], is_disk ? VID_OSS_DISK : VID_OSS_TAPE); 159 write16(&vid[VID_OSL_OFF], len); 160 write32(&vid[VID_OSA_OFF], VID_OSA); 161 vid[VID_CAS_OFF] = VID_CAS; 162 vid[VID_CAL_OFF] = VID_CAL; 163 memcpy(&vid[VID_MOT_OFF], VID_MOT, VID_MOT_LEN); 164 write16(&vid[CFG_REC_OFF], CFG_REC); 165 write16(&vid[CFG_PSM_OFF], CFG_PSM); 166 167 /* Create and write it out */ 168 if ((fd = open(fn, O_WRONLY | O_CREAT | O_TRUNC, 0644)) < 0) { 169 perror(fn); 170 exit(1); 171 } 172 173 if (write(fd, vid, SIZEOF_VID) != SIZEOF_VID) { 174 perror(fn); 175 exit(1); 176 } 177 178 close(fd); 179 free(vid); 180 181 return(0); 182 } 183
Indexes created Sat Oct 11 19:10:01 GMT 2025