usr.sbin/installboot/arch/next68k.c

   1 /* $NetBSD: next68k.c,v 1.6 2009/04/05 11:55:39 lukem Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2003 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by David Laight and Christian Limpach.
   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  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #if HAVE_NBTOOL_CONFIG_H
  33 #include "nbtool_config.h"
  34 #endif
  35
  36 #include <sys/cdefs.h>
  37 #if !defined(__lint)
  38 __RCSID("$NetBSD: next68k.c,v 1.6 2009/04/05 11:55:39 lukem Exp $");
  39 #endif /* !__lint */
  40
  41 #include <sys/param.h>
  42
  43 #include <assert.h>
  44 #include <err.h>
  45 #include <md5.h>
  46 #include <stddef.h>
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50 #include <unistd.h>
  51
  52 #include "installboot.h"
  53
  54 static uint16_t nextstep_checksum(const void *, const void *);
  55 static int next68k_setboot(ib_params *);
  56
  57 struct ib_mach ib_mach_next68k =
  58         { "next68k", next68k_setboot, no_clearboot, no_editboot, 0};
  59
  60 static uint16_t
  61 nextstep_checksum(const void *vbuf, const void *vlimit)
  62 {
  63         const uint16_t *buf = vbuf;
  64         const uint16_t *limit = vlimit;
  65         u_int sum = 0;
  66
  67         while (buf < limit) {
  68                 sum += be16toh(*buf++);
  69         }
  70         sum += (sum >> 16);
  71         return (sum & 0xffff);
  72 }
  73
  74 static int
  75 next68k_setboot(ib_params *params)
  76 {
  77         int retval, labelupdated;
  78         uint8_t *bootbuf;
  79         size_t bootsize;
  80         ssize_t rv;
  81         uint32_t cd_secsize;
  82         int sec_netonb_mult;
  83         struct next68k_disklabel *next68klabel;
  84         uint16_t *checksum;
  85         uint32_t fp, b0, b1;
  86
  87         assert(params != NULL);
  88         assert(params->fsfd != -1);
  89         assert(params->filesystem != NULL);
  90         assert(params->s1fd != -1);
  91         assert(params->stage1 != NULL);
  92
  93         retval = 0;
  94         labelupdated = 0;
  95         bootbuf = NULL;
  96
  97         next68klabel = malloc(NEXT68K_LABEL_SIZE);
  98         if (next68klabel == NULL) {
  99                 warn("Allocating %lu bytes", (unsigned long)NEXT68K_LABEL_SIZE);
 100                 goto done;
 101         }
 102
 103         /*
 104          * Read in the next68k disklabel
 105          */
 106         rv = pread(params->fsfd, next68klabel, NEXT68K_LABEL_SIZE,
 107             NEXT68K_LABEL_SECTOR * params->sectorsize + NEXT68K_LABEL_OFFSET);
 108         if (rv == -1) {
 109                 warn("Reading `%s'", params->filesystem);
 110                 goto done;
 111         }
 112         if (rv != NEXT68K_LABEL_SIZE) {
 113                 warnx("Reading `%s': short read", params->filesystem);
 114                 goto done;
 115         }
 116         if (be32toh(next68klabel->cd_version) == NEXT68K_LABEL_CD_V3) {
 117                 checksum = &next68klabel->NEXT68K_LABEL_cd_v3_checksum;
 118         } else {
 119                 checksum = &next68klabel->cd_checksum;
 120         }
 121         if (nextstep_checksum (next68klabel, checksum) !=
 122             be16toh(*checksum)) {
 123                 warn("Disklabel checksum invalid on `%s'",
 124                     params->filesystem);
 125                 goto done;
 126         }
 127
 128         cd_secsize = be32toh(next68klabel->cd_secsize);
 129         sec_netonb_mult = (cd_secsize / params->sectorsize);
 130
 131         /*
 132          * Allocate a buffer, with space to round up the input file
 133          * to the next block size boundary, and with space for the boot
 134          * block.
 135          */
 136         bootsize = roundup(params->s1stat.st_size, cd_secsize);
 137
 138         bootbuf = malloc(bootsize);
 139         if (bootbuf == NULL) {
 140                 warn("Allocating %zu bytes", bootsize);
 141                 goto done;
 142         }
 143         memset(bootbuf, 0, bootsize);
 144
 145         /*
 146          * Read the file into the buffer.
 147          */
 148         rv = pread(params->s1fd, bootbuf, params->s1stat.st_size, 0);
 149         if (rv == -1) {
 150                 warn("Reading `%s'", params->stage1);
 151                 goto done;
 152         } else if (rv != params->s1stat.st_size) {
 153                 warnx("Reading `%s': short read", params->stage1);
 154                 goto done;
 155         }
 156
 157         if (bootsize > be16toh(next68klabel->cd_front) * cd_secsize -
 158             NEXT68K_LABEL_SIZE) {
 159                 warnx("Boot program is larger than front porch space");
 160                 goto done;
 161         }
 162
 163         fp = be16toh(next68klabel->cd_front);
 164         b0 = be32toh(next68klabel->cd_boot_blkno[0]);
 165         b1 = be32toh(next68klabel->cd_boot_blkno[1]);
 166
 167         if (b0 > fp)
 168                 b0 = fp;
 169         if (b1 > fp)
 170                 b1 = fp;
 171         if (((bootsize / cd_secsize) > b1 - b0) ||
 172             ((bootsize / cd_secsize) > fp - b1)) {
 173                 if (2 * bootsize > (fp * cd_secsize - NEXT68K_LABEL_SIZE))
 174                         /* can only fit one copy */
 175                         b0 = b1 = NEXT68K_LABEL_SIZE / cd_secsize;
 176                 else {
 177                         if (2 * bootsize > (fp * cd_secsize -
 178                                 NEXT68K_LABEL_DEFAULTBOOT0_1 *
 179                                 params->sectorsize))
 180                                 /* can fit two copies starting after label */
 181                                 b0 = NEXT68K_LABEL_SIZE / cd_secsize;
 182                         else
 183                                 /* can fit two copies starting at default 1 */
 184                                 b0 = NEXT68K_LABEL_DEFAULTBOOT0_1 /
 185                                         sec_netonb_mult;
 186                         /* try to fit 2nd copy at default 2 */
 187                         b1 = NEXT68K_LABEL_DEFAULTBOOT0_2 / sec_netonb_mult;
 188                         if (fp < b1)
 189                                 b1 = fp;
 190                         if (bootsize / cd_secsize > (fp - b1))
 191                                 /* fit 2nd copy before front porch */
 192                                 b1 = fp - bootsize / cd_secsize;
 193                 }
 194         }
 195         if (next68klabel->cd_boot_blkno[0] != (int32_t)htobe32(b0)) {
 196                 next68klabel->cd_boot_blkno[0] = htobe32(b0);
 197                 labelupdated = 1;
 198         }
 199         if (next68klabel->cd_boot_blkno[1] != (int32_t)htobe32(b1)) {
 200                 next68klabel->cd_boot_blkno[1] = htobe32(b1);
 201                 labelupdated = 1;
 202         }
 203         if (params->flags & IB_VERBOSE)
 204                 printf("Boot programm locations%s: %d %d\n",
 205                     labelupdated ? " updated" : "", b0 * sec_netonb_mult,
 206                     b1 * sec_netonb_mult);
 207
 208         if (params->flags & IB_NOWRITE) {
 209                 retval = 1;
 210                 goto done;
 211         }
 212
 213         /*
 214          * Write the updated next68k disklabel
 215          */
 216         if (labelupdated) {
 217                 if (params->flags & IB_VERBOSE)
 218                         printf ("Writing updated label\n");
 219                 *checksum = htobe16(nextstep_checksum (next68klabel,
 220                                         checksum));
 221                 rv = pwrite(params->fsfd, next68klabel, NEXT68K_LABEL_SIZE,
 222                     NEXT68K_LABEL_SECTOR * params->sectorsize +
 223                     NEXT68K_LABEL_OFFSET);
 224                 if (rv == -1) {
 225                         warn("Writing `%s'", params->filesystem);
 226                         goto done;
 227                 }
 228                 if (rv != NEXT68K_LABEL_SIZE) {
 229                         warnx("Writing `%s': short write", params->filesystem);
 230                         goto done;
 231                 }
 232         }
 233
 234         b0 *= sec_netonb_mult;
 235         b1 *= sec_netonb_mult;
 236
 237         /*
 238          * Write boot program to locations b0 and b1 (if different).
 239          */
 240         for (;;) {
 241                 if (params->flags & IB_VERBOSE)
 242                         printf ("Writing boot program at %d\n", b0);
 243                 rv = pwrite(params->fsfd, bootbuf, bootsize,
 244                     b0 * params->sectorsize);
 245                 if (rv == -1) {
 246                         warn("Writing `%s' at %d", params->filesystem, b0);
 247                         goto done;
 248                 }
 249                 if ((size_t)rv != bootsize) {
 250                         warnx("Writing `%s' at %d: short write",
 251                             params->filesystem, b0);
 252                         goto done;
 253                 }
 254                 if (b0 == b1)
 255                         break;
 256                 b0 = b1;
 257         }
 258
 259         retval = 1;
 260
 261  done:
 262         if (bootbuf)
 263                 free(bootbuf);
 264         if (next68klabel)
 265                 free(next68klabel);
 266         return retval;
 267 }