1 /* $NetBSD: next68k.c,v 1.10 2023/02/14 20:27:17 andvar 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 1.10 2023/02/14 20:27:17 andvar 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 .name = "next68k",
59 .setboot = next68k_setboot,
60 .clearboot = no_clearboot,
61 .editboot = no_editboot,
62 };
63
64 static uint16_t
nextstep_checksum(const void * vbuf,const void * vlimit)65 nextstep_checksum(const void *vbuf, const void *vlimit)
66 {
67 const uint16_t *buf = vbuf;
68 const uint16_t *limit = vlimit;
69 u_int sum = 0;
70
71 while (buf < limit) {
72 sum += be16toh(*buf++);
73 }
74 sum += (sum >> 16);
75 return (sum & 0xffff);
76 }
77
78 static int
next68k_setboot(ib_params * params)79 next68k_setboot(ib_params *params)
80 {
81 int retval, labelupdated;
82 uint8_t *bootbuf;
83 size_t bootsize;
84 ssize_t rv;
85 uint32_t cd_secsize;
86 int sec_netonb_mult;
87 struct next68k_disklabel *next68klabel;
88 uint16_t *checksum;
89 uint32_t fp, b0, b1;
90
91 assert(params != NULL);
92 assert(params->fsfd != -1);
93 assert(params->filesystem != NULL);
94 assert(params->s1fd != -1);
95 assert(params->stage1 != NULL);
96
97 retval = 0;
98 labelupdated = 0;
99 bootbuf = NULL;
100
101 next68klabel = malloc(NEXT68K_LABEL_SIZE);
102 if (next68klabel == NULL) {
103 warn("Allocating %lu bytes", (unsigned long)NEXT68K_LABEL_SIZE);
104 goto done;
105 }
106
107 /*
108 * Read in the next68k disklabel
109 */
110 rv = pread(params->fsfd, next68klabel, NEXT68K_LABEL_SIZE,
111 NEXT68K_LABEL_SECTOR * params->sectorsize + NEXT68K_LABEL_OFFSET);
112 if (rv == -1) {
113 warn("Reading `%s'", params->filesystem);
114 goto done;
115 }
116 if (rv != NEXT68K_LABEL_SIZE) {
117 warnx("Reading `%s': short read", params->filesystem);
118 goto done;
119 }
120 if (be32toh(next68klabel->cd_version) == NEXT68K_LABEL_CD_V3) {
121 checksum = &next68klabel->NEXT68K_LABEL_cd_v3_checksum;
122 } else {
123 checksum = &next68klabel->cd_checksum;
124 }
125 if (nextstep_checksum (next68klabel, checksum) !=
126 be16toh(*checksum)) {
127 warn("Disklabel checksum invalid on `%s'",
128 params->filesystem);
129 goto done;
130 }
131
132 cd_secsize = be32toh(next68klabel->cd_secsize);
133 sec_netonb_mult = (cd_secsize / params->sectorsize);
134
135 /*
136 * Allocate a buffer, with space to round up the input file
137 * to the next block size boundary, and with space for the boot
138 * block.
139 */
140 bootsize = roundup(params->s1stat.st_size, cd_secsize);
141
142 bootbuf = malloc(bootsize);
143 if (bootbuf == NULL) {
144 warn("Allocating %zu bytes", bootsize);
145 goto done;
146 }
147 memset(bootbuf, 0, bootsize);
148
149 /*
150 * Read the file into the buffer.
151 */
152 rv = pread(params->s1fd, bootbuf, params->s1stat.st_size, 0);
153 if (rv == -1) {
154 warn("Reading `%s'", params->stage1);
155 goto done;
156 } else if (rv != params->s1stat.st_size) {
157 warnx("Reading `%s': short read", params->stage1);
158 goto done;
159 }
160
161 if (bootsize > be16toh(next68klabel->cd_front) * cd_secsize -
162 NEXT68K_LABEL_SIZE) {
163 warnx("Boot program is larger than front porch space");
164 goto done;
165 }
166
167 fp = be16toh(next68klabel->cd_front);
168 b0 = be32toh(next68klabel->cd_boot_blkno[0]);
169 b1 = be32toh(next68klabel->cd_boot_blkno[1]);
170
171 if (b0 > fp)
172 b0 = fp;
173 if (b1 > fp)
174 b1 = fp;
175 if (((bootsize / cd_secsize) > b1 - b0) ||
176 ((bootsize / cd_secsize) > fp - b1)) {
177 if (2 * bootsize > (fp * cd_secsize - NEXT68K_LABEL_SIZE))
178 /* can only fit one copy */
179 b0 = b1 = NEXT68K_LABEL_SIZE / cd_secsize;
180 else {
181 if (2 * bootsize > (fp * cd_secsize -
182 NEXT68K_LABEL_DEFAULTBOOT0_1 *
183 params->sectorsize))
184 /* can fit two copies starting after label */
185 b0 = NEXT68K_LABEL_SIZE / cd_secsize;
186 else
187 /* can fit two copies starting at default 1 */
188 b0 = NEXT68K_LABEL_DEFAULTBOOT0_1 /
189 sec_netonb_mult;
190 /* try to fit 2nd copy at default 2 */
191 b1 = NEXT68K_LABEL_DEFAULTBOOT0_2 / sec_netonb_mult;
192 if (fp < b1)
193 b1 = fp;
194 if (bootsize / cd_secsize > (fp - b1))
195 /* fit 2nd copy before front porch */
196 b1 = fp - bootsize / cd_secsize;
197 }
198 }
199 if (next68klabel->cd_boot_blkno[0] != (int32_t)htobe32(b0)) {
200 next68klabel->cd_boot_blkno[0] = htobe32(b0);
201 labelupdated = 1;
202 }
203 if (next68klabel->cd_boot_blkno[1] != (int32_t)htobe32(b1)) {
204 next68klabel->cd_boot_blkno[1] = htobe32(b1);
205 labelupdated = 1;
206 }
207 if (params->flags & IB_VERBOSE)
208 printf("Boot program locations%s: %d %d\n",
209 labelupdated ? " updated" : "", b0 * sec_netonb_mult,
210 b1 * sec_netonb_mult);
211
212 if (params->flags & IB_NOWRITE) {
213 retval = 1;
214 goto done;
215 }
216
217 /*
218 * Write the updated next68k disklabel
219 */
220 if (labelupdated) {
221 if (params->flags & IB_VERBOSE)
222 printf ("Writing updated label\n");
223 *checksum = htobe16(nextstep_checksum (next68klabel,
224 checksum));
225 rv = pwrite(params->fsfd, next68klabel, NEXT68K_LABEL_SIZE,
226 NEXT68K_LABEL_SECTOR * params->sectorsize +
227 NEXT68K_LABEL_OFFSET);
228 if (rv == -1) {
229 warn("Writing `%s'", params->filesystem);
230 goto done;
231 }
232 if (rv != NEXT68K_LABEL_SIZE) {
233 warnx("Writing `%s': short write", params->filesystem);
234 goto done;
235 }
236 }
237
238 b0 *= sec_netonb_mult;
239 b1 *= sec_netonb_mult;
240
241 /*
242 * Write boot program to locations b0 and b1 (if different).
243 */
244 for (;;) {
245 if (params->flags & IB_VERBOSE)
246 printf ("Writing boot program at %d\n", b0);
247 rv = pwrite(params->fsfd, bootbuf, bootsize,
248 b0 * params->sectorsize);
249 if (rv == -1) {
250 warn("Writing `%s' at %d", params->filesystem, b0);
251 goto done;
252 }
253 if ((size_t)rv != bootsize) {
254 warnx("Writing `%s' at %d: short write",
255 params->filesystem, b0);
256 goto done;
257 }
258 if (b0 == b1)
259 break;
260 b0 = b1;
261 }
262
263 retval = 1;
264
265 done:
266 if (bootbuf)
267 free(bootbuf);
268 if (next68klabel)
269 free(next68klabel);
270 return retval;
271 }
272