2 * FIS table updating code for mtd
4 * Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License v2
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
25 struct fis_image_hdr {
26 unsigned char name[16];
32 } __attribute__((packed));
34 struct fis_image_crc {
37 } __attribute__((packed));
39 struct fis_image_desc {
40 struct fis_image_hdr hdr;
41 char _pad[256 - sizeof(struct fis_image_hdr) - sizeof(struct fis_image_crc)];
42 struct fis_image_crc crc;
43 } __attribute__((packed));
45 static int fis_fd = -1;
46 static struct fis_image_desc *fis_desc;
47 static int fis_erasesize = 0;
53 munmap(fis_desc, fis_erasesize);
62 static struct fis_image_desc *
65 struct fis_image_desc *desc;
70 fis_fd = mtd_check_open("FIS directory");
75 fis_fd = mtd_open("FIS directory", true);
79 fis_erasesize = erasesize;
80 desc = mmap(NULL, erasesize, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_LOCKED, fis_fd, 0);
81 if (desc == MAP_FAILED)
93 fis_validate(struct fis_part *old, int n_old, struct fis_part *new, int n_new)
95 struct fis_image_desc *desc;
104 for (i = 0; i < n_new - 1; i++) {
106 fprintf(stderr, "FIS error: only the last partition can detect the size automatically\n");
113 end = (char *) end + fis_erasesize;
114 while ((void *) desc < end) {
115 if (!desc->hdr.name[0] || (desc->hdr.name[0] == 0xff))
118 for (i = 0; i < n_old; i++) {
119 if (!strncmp((char *) desc->hdr.name, (char *) old[i].name, sizeof(desc->hdr.name))) {
140 fis_remap(struct fis_part *old, int n_old, struct fis_part *new, int n_new)
142 struct fis_image_desc *fisdir = NULL;
143 struct fis_image_desc *redboot = NULL;
144 struct fis_image_desc *first = NULL;
145 struct fis_image_desc *last = NULL;
146 struct fis_image_desc *desc;
147 struct fis_part *part;
148 uint32_t offset = 0, size = 0;
149 char *start, *end, *tmp;
157 fprintf(stderr, "Updating FIS table... \n");
159 start = (char *) desc;
160 end = (char *) desc + fis_erasesize;
161 while ((char *) desc < end) {
162 if (!desc->hdr.name[0] || (desc->hdr.name[0] == 0xff))
165 if (!strcmp((char *) desc->hdr.name, "FIS directory"))
168 if (!strcmp((char *) desc->hdr.name, "RedBoot"))
171 /* update max offset */
172 if (offset < desc->hdr.flash_base)
173 offset = desc->hdr.flash_base;
175 for (i = 0; i < n_old; i++) {
176 if (!strncmp((char *) desc->hdr.name, (char *) old[i].name, sizeof(desc->hdr.name))) {
187 /* determine size of available space */
188 desc = (struct fis_image_desc *) start;
189 while ((char *) desc < end) {
190 if (!desc->hdr.name[0] || (desc->hdr.name[0] == 0xff))
193 if (desc->hdr.flash_base > last->hdr.flash_base &&
194 desc->hdr.flash_base < offset)
195 offset = desc->hdr.flash_base;
201 size = offset - first->hdr.flash_base;
205 if (redboot && (desc >= redboot)) {
206 if (first->hdr.flash_base - desc->hdr.size > desc->hdr.flash_base) {
207 int delta = first->hdr.flash_base - desc->hdr.size - desc->hdr.flash_base;
216 desc = first + n_new;
217 offset = first->hdr.flash_base;
225 memmove(desc, last, end - tmp);
227 tmp = end - (last - desc) * sizeof(struct fis_image_desc);
228 memset(tmp, 0xff, tmp - end);
232 for (part = new, desc = first; desc < first + n_new; desc++, part++) {
233 memset(desc, 0, sizeof(struct fis_image_desc));
234 memcpy(desc->hdr.name, part->name, sizeof(desc->hdr.name));
238 desc->hdr.flash_base = offset;
239 desc->hdr.mem_base = part->loadaddr;
240 desc->hdr.entry_point = part->loadaddr;
241 desc->hdr.size = (part->size > 0) ? part->size : size;
242 desc->hdr.data_length = desc->hdr.size;
244 offset += desc->hdr.size;
245 size -= desc->hdr.size;
248 msync(fis_desc, fis_erasesize, MS_SYNC|MS_INVALIDATE);