summaryrefslogtreecommitdiffstats
path: root/tools/firmware-utils/src/imagetag.c
blob: 1fb45e9e9598673b6fab56745840ecdd77ae68fa (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2008 Axel Gembe <ago@bastart.eu.org>
 * Copyright (C) 2009 Daniel Dickinson <crazycshore@gmail.com>
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <time.h>
#include <unistd.h>
#include <sys/stat.h>
#include <netinet/in.h>

#include "bcm_tag.h"

#define IMAGETAG_MAGIC1			"Broadcom Corporatio"
#define IMAGETAG_MAGIC2			"ver. 2.0"
#define IMAGETAG_VER			"6"
#define IMAGETAG_DEFAULT_LOADADDR	0x80010000
#define DEFAULT_FW_OFFSET		0x10000
#define DEFAULT_FLASH_START		0xBFC00000
#define DEFAULT_FLASH_BS		(64 * 1024)
#define DEADCODE			0xDEADC0DE

union int2char {
  uint32_t input;
  char output[4];
};

/* This appears to be necessary due to alignment issues */
#define int2tag(tag, value)  intchar.input = htonl(value);	\
	  strncpy(tag, intchar.output, sizeof(union int2char))

/* Kernel header */
struct kernelhdr {
	uint32_t		loadaddr;	/* Kernel load address */
	uint32_t		entry;		/* Kernel entry point address */
	uint32_t		lzmalen;	/* Compressed length of the LZMA data that follows */
};

static char pirellitab[NUM_PIRELLI][BOARDID_LEN] = PIRELLI_BOARDS;

static uint32_t crc32tab[256] = {
	0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
	0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
	0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
	0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
	0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
	0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
	0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
	0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
	0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
	0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
	0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
	0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
	0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
	0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
	0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
	0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
	0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
	0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
	0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
	0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
	0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
	0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
	0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
	0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
	0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
	0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
	0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
	0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
	0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
	0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
	0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
	0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
};

uint32_t crc32(uint32_t crc, uint8_t *data, size_t len)
{
	while (len--)
		crc = (crc >> 8) ^ crc32tab[(crc ^ *data++) & 0xFF];

	return crc;
}

uint32_t compute_crc32(uint32_t crc, FILE *binfile, size_t compute_start, size_t compute_len)
{
	uint8_t readbuf[1024];
	size_t read;

	fseek(binfile, compute_start, SEEK_SET);

	/* read block of 1024 bytes */
	while (binfile && !feof(binfile) && !ferror(binfile) && (compute_len >= sizeof(readbuf))) {
		read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), binfile);
		crc = crc32(crc, readbuf, read);
		compute_len = compute_len - read;
	}

	/* Less than 1024 bytes remains, read compute_len bytes */
	if (binfile && !feof(binfile) && !ferror(binfile) && (compute_len > 0)) {
		read = fread(readbuf, sizeof(uint8_t), compute_len, binfile);
		crc = crc32(crc, readbuf, read);
	}

	return crc;
}

size_t getlen(FILE *fp)
{
	size_t retval, curpos;

	if (!fp)
		return 0;

	curpos = ftell(fp);
	fseek(fp, 0, SEEK_END);
	retval = ftell(fp);
	fseek(fp, curpos, SEEK_SET);

	return retval;
}

int tagfile(const char *kernel, const char *rootfs, const char *bin,
	    const char *boardid, const char *chipid, const uint32_t fwaddr,
	    const uint32_t loadaddr, const uint32_t entry,
	    const char *ver, const char *magic2, const uint32_t flash_bs,
	    const char *rsignature, const char *layoutver)
{
	struct bcm_tag tag;
	struct kernelhdr khdr;
	FILE *kernelfile = NULL, *rootfsfile = NULL, *binfile;
	size_t kerneloff, kernellen, rootfsoff, rootfslen, read, imagelen, rootfsoffpadlen, kernelfslen;
	uint8_t readbuf[1024];
	uint32_t imagecrc = IMAGETAG_CRC_START;
	uint32_t kernelcrc = IMAGETAG_CRC_START;
	uint32_t rootfscrc = IMAGETAG_CRC_START;
	uint32_t kernelfscrc = IMAGETAG_CRC_START;
	const uint32_t deadcode = htonl(DEADCODE);
        union int2char intchar;
        int i;
        int is_pirelli = 0;

	memset(&tag, 0, sizeof(struct bcm_tag));

	if (strlen(boardid) >= sizeof(tag.boardid)) {
		fprintf(stderr, "Board id is too long!\n");
		return 1;
	}

	/* Likewise chipid */
	if (strlen(chipid) >= sizeof(tag.chipid)) {
		fprintf(stderr, "Chip id is too long!\n");
		return 1;
	}

	if (!kernel || !rootfs) {
		fprintf(stderr, "imagetag can't create an image without both kernel and rootfs\n");
	}

	if (kernel && !(kernelfile = fopen(kernel, "rb"))) {
		fprintf(stderr, "Unable to open kernel \"%s\"\n", kernel);
		return 1;
	}

	if (rootfs && !(rootfsfile = fopen(rootfs, "rb"))) {
		fprintf(stderr, "Unable to open rootfs \"%s\"\n", rootfs);
		return 1;
	}

	if (!bin || !(binfile = fopen(bin, "wb+"))) {
		fprintf(stderr, "Unable to open output file \"%s\"\n", bin);
		return 1;
	}

	/* Build the kernel address and length (doesn't need to be aligned, read only) */
	kerneloff = fwaddr + sizeof(tag);
	kernellen = getlen(kernelfile);

	/* Build the kernel header */
	khdr.loadaddr	= htonl(loadaddr);
	khdr.entry	= htonl(entry);
	khdr.lzmalen	= htonl(kernellen);

	/* Increase the kernel size by the header size */
	kernellen += sizeof(khdr);

	/* Build the rootfs address and length (start and end do need to be aligned on flash erase block boundaries */
	rootfsoff = kerneloff + kernellen;
	rootfsoff = (rootfsoff % flash_bs) > 0 ? (((rootfsoff / flash_bs) + 1) * flash_bs) : rootfsoff;
	rootfslen = getlen(rootfsfile);
	rootfslen = ( (rootfslen % flash_bs) > 0 ? (((rootfslen / flash_bs) + 1) * flash_bs) : rootfslen );
	imagelen = rootfsoff + rootfslen - kerneloff + sizeof(deadcode);
	rootfsoffpadlen = rootfsoff - (kerneloff + kernellen);

	/* Seek to the start of the kernel */
	fseek(binfile, kerneloff - fwaddr, SEEK_SET);

	/* Write the kernel header */
	fwrite(&khdr, sizeof(khdr), 1, binfile);

	/* Write the kernel */
	while (kernelfile && !feof(kernelfile) && !ferror(kernelfile)) {
		read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), kernelfile);
		fwrite(readbuf, sizeof(uint8_t), read, binfile);
	}

	/* Write the RootFS */
	fseek(binfile, rootfsoff - fwaddr, SEEK_SET);
	while (rootfsfile && !feof(rootfsfile) && !ferror(rootfsfile)) {
		read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), rootfsfile);
		fwrite(readbuf, sizeof(uint8_t), read, binfile);
	}

	/* Align image to specified erase block size and append deadc0de */
	printf("Data alignment to %dk with 'deadc0de' appended\n", flash_bs/1024);
	fseek(binfile, rootfsoff + rootfslen - fwaddr, SEEK_SET);
	fwrite(&deadcode, sizeof(uint32_t), 1, binfile);

	/* Flush the binfile buffer so that when we read from file, it contains
         * everything in the buffer
	 */
	fflush(binfile);

	/* Compute the crc32 of the entire image (deadC0de included) */
	imagecrc = compute_crc32(imagecrc, binfile, kerneloff - fwaddr, imagelen);
        /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
	kernelcrc = compute_crc32(kernelcrc, binfile, kerneloff - fwaddr, kernellen + rootfsoffpadlen);
        /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
	kernelfscrc = compute_crc32(kernelfscrc, binfile, kerneloff - fwaddr, kernellen + rootfsoffpadlen + rootfslen + sizeof(deadcode));
	/* Compute the crc32 of the flashImageStart to rootLength.
         * The broadcom firmware assumes the rootfs starts the image,
         * therefore uses the rootfs start to determine where to flash
         * the image.  Since we have the kernel first we have to give
         * it the kernel address, but the crc uses the length
         * associated with this address, which is added to the kernel
         * length to determine the length of image to flash and thus
         * needs to be rootfs + deadcode
         */
	rootfscrc = compute_crc32(rootfscrc, binfile, kerneloff - fwaddr, rootfslen + sizeof(deadcode));

	/* Close the files */
	fclose(kernelfile);
	fclose(rootfsfile);

	/* Build the tag */
	strncpy(tag.tagVersion, ver, TAGVER_LEN);
	strncpy(tag.sig_1, IMAGETAG_MAGIC1, sizeof(tag.sig_1) - 1);
	strncpy(tag.sig_2, magic2, sizeof(tag.sig_2) - 1);
	strcpy(tag.chipid, chipid);
	strcpy(tag.boardid, boardid);
	strcpy(tag.big_endian, "1");
	sprintf(tag.totalLength, "%lu", imagelen);

	/* We don't include CFE */
	strcpy(tag.cfeAddress, "0");
	strcpy(tag.cfeLength, "0");

        sprintf(tag.kernelAddress, "%lu", kerneloff);
	sprintf(tag.kernelLength, "%lu", kernellen + rootfsoffpadlen);
        sprintf(tag.flashImageStart, "%lu", kerneloff);
	sprintf(tag.rootLength, "%lu", rootfslen + sizeof(deadcode));

	if (rsignature) {
	    strncpy(tag.rsa_signature, rsignature, RSASIG_LEN);
	}

        if (layoutver) {
	    strncpy(tag.flashLayoutVer, layoutver, TAGLAYOUT_LEN);
	}

	for (i = 0; i < NUM_PIRELLI; i++) {
		if (strncmp(boardid, pirellitab[i], BOARDID_LEN) == 0) {
			is_pirelli = 1;
			break;
		}
	}

	if ( !is_pirelli ) {
		int2tag(tag.imageCRC, imagecrc);
	} else {
	        int2tag(tag.imageCRC, kernelcrc);
	}
        int2tag(tag.kernelCRC, kernelcrc);
        int2tag(tag.rootfsCRC, rootfscrc);
	int2tag(tag.fskernelCRC, kernelfscrc);
	int2tag(tag.headerCRC, crc32(IMAGETAG_CRC_START, (uint8_t*)&tag, sizeof(tag) - 20));

	fseek(binfile, 0L, SEEK_SET);
	fwrite(&tag, sizeof(uint8_t), sizeof(tag), binfile);

	fclose(binfile);

	return 0;
}

int main(int argc, char **argv)
{
        int c, i;
	char *kernel, *rootfs, *bin, *boardid, *chipid, *magic2, *ver, *tagid, *rsignature, *layoutver;
	uint32_t flashstart, fwoffset, loadaddr, entry;
	uint32_t fwaddr, flash_bs;
	int tagidfound = 0;

	kernel = rootfs = bin = boardid = chipid = magic2 = ver = rsignature = layoutver = NULL;
	entry = 0;

	flashstart = DEFAULT_FLASH_START;
	fwoffset = DEFAULT_FW_OFFSET;
	loadaddr = IMAGETAG_DEFAULT_LOADADDR;
	flash_bs = DEFAULT_FLASH_BS;

	printf("Broadcom image tagger - v1.0.0\n");
	printf("Copyright (C) 2008 Axel Gembe\n");
	printf("Copyright (C) 2009-2010 Daniel Dickinson\n");

	while ((c = getopt(argc, argv, "i:f:o:b:c:s:n:v:m:k:l:e:h:r:y:")) != -1) {
		switch (c) {
			case 'i':
				kernel = optarg;
				break;
			case 'f':
				rootfs = optarg;
				break;
			case 'o':
				bin = optarg;
				break;
			case 'b':
				boardid = optarg;
				break;
			case 'c':
				chipid = optarg;
				break;
			case 's':
				flashstart = strtoul(optarg, NULL, 16);
				break;
			case 'n':
				fwoffset = strtoul(optarg, NULL, 16);
				break;
			case 'v':
				ver = optarg;
				break;
			case 'm':
				magic2 = optarg;
				break;
			case 'k':
				flash_bs = strtoul(optarg, NULL, 16);
				break;
			case 'l':
				loadaddr = strtoul(optarg, NULL, 16);
				break;
			case 'e':
				entry = strtoul(optarg, NULL, 16);
				break;
		        case 'r':
			        rsignature = optarg;
				break;
		        case 'y':
			        layoutver = optarg;
				break;
			case 'h':
			default:
				fprintf(stderr, "Usage: imagetag <parameters>\n\n");
				fprintf(stderr, "	-i <kernel>		- The LZMA compressed kernel file to include in the image\n");
				fprintf(stderr, "	-f <rootfs>		- The RootFS file to include in the image\n");
				fprintf(stderr, "	-o <bin>		- The output file\n");
				fprintf(stderr, "	-b <boardid>		- The board id to set in the image (i.e. \"96345GW2\")\n");
				fprintf(stderr, "	-c <chipid>		- The chip id to set in the image (i.e. \"6345\")\n");
				fprintf(stderr, "	-s <flashstart> 	- Flash start address (i.e. \"0xBFC00000\"\n");
				fprintf(stderr, "	-n <fwoffset>   	- \n");
				fprintf(stderr, "	-v <version>		- \n");
				fprintf(stderr, "	-m <magic2>		- \n");
				fprintf(stderr, "	-k <flash_bs>		- flash erase block size\n");
				fprintf(stderr, "	-l <loadaddr>		- Address where the kernel expects to be loaded (defaults to 0x80010000)\n");
				fprintf(stderr, "	-e <entry>		- Address where the kernel entry point will end up\n");
				fprintf(stderr, "       -r <signature>          - vendor specific signature, for those that need it");
				fprintf(stderr, "       -y <layoutver>          - Flash Layout Version (2.2x code versions need this)");
				fprintf(stderr, "	-h			- Displays this text\n\n");
				return 1;
		}
	}

	if (!boardid || !chipid) {
		fprintf(stderr, "You need to specify the board (-b) and chip id (-c)!\n");
		return 1;
	}

	if (entry == 0) {
		fprintf(stderr, "You need to specify the kernel entry (-e)\n");
		return 1;
	}

	/* Fallback to defaults */

	fwaddr = flashstart + fwoffset;

	if (!magic2) {
		magic2 = malloc(sizeof(char) * 14);
		if (!magic2) {
			perror("malloc");
			return 1;
		}
		strcpy(magic2, IMAGETAG_MAGIC2);
	}

	if (!ver) {
		ver = malloc(sizeof(char) * 4);
		if (!ver) {
			perror("malloc");
			return 1;
		}
		strcpy(ver, IMAGETAG_VER);
	}


	return tagfile(kernel, rootfs, bin, boardid, chipid, fwaddr, loadaddr, entry, ver, magic2, flash_bs, rsignature, layoutver);
}