summaryrefslogtreecommitdiff
path: root/common/image-android.c
blob: 1fbbbba1eb0e0707de9f4892b06fa4147913d40c (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
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (c) 2011 Sebastian Andrzej Siewior <bigeasy@linutronix.de>
 */

#include <common.h>
#include <env.h>
#include <image.h>
#include <image-android-dt.h>
#include <android_image.h>
#include <malloc.h>
#include <errno.h>
#include <asm/unaligned.h>
#include <mapmem.h>
#include <linux/libfdt.h>

#define ANDROID_IMAGE_DEFAULT_KERNEL_ADDR	0x10008000

static char andr_tmp_str[ANDR_BOOT_ARGS_SIZE + 1];

static ulong android_image_get_kernel_addr(const struct andr_img_hdr *hdr)
{
	/*
	 * All the Android tools that generate a boot.img use this
	 * address as the default.
	 *
	 * Even though it doesn't really make a lot of sense, and it
	 * might be valid on some platforms, we treat that adress as
	 * the default value for this field, and try to execute the
	 * kernel in place in such a case.
	 *
	 * Otherwise, we will return the actual value set by the user.
	 */
	if (hdr->kernel_addr == ANDROID_IMAGE_DEFAULT_KERNEL_ADDR)
		return (ulong)hdr + hdr->page_size;

	/*
	 * abootimg creates images where all load addresses are 0
	 * and we need to fix them.
	 */
	if (hdr->kernel_addr == 0 && hdr->ramdisk_addr == 0)
		return env_get_ulong("kernel_addr_r", 16, 0);

	return hdr->kernel_addr;
}

/**
 * android_image_get_kernel() - processes kernel part of Android boot images
 * @hdr:	Pointer to image header, which is at the start
 *			of the image.
 * @verify:	Checksum verification flag. Currently unimplemented.
 * @os_data:	Pointer to a ulong variable, will hold os data start
 *			address.
 * @os_len:	Pointer to a ulong variable, will hold os data length.
 *
 * This function returns the os image's start address and length. Also,
 * it appends the kernel command line to the bootargs env variable.
 *
 * Return: Zero, os start address and length on success,
 *		otherwise on failure.
 */
int android_image_get_kernel(const struct andr_img_hdr *hdr, int verify,
			     ulong *os_data, ulong *os_len)
{
	u32 kernel_addr = android_image_get_kernel_addr(hdr);
	const struct image_header *ihdr = (const struct image_header *)
		((uintptr_t)hdr + hdr->page_size);

	/*
	 * Not all Android tools use the id field for signing the image with
	 * sha1 (or anything) so we don't check it. It is not obvious that the
	 * string is null terminated so we take care of this.
	 */
	strncpy(andr_tmp_str, hdr->name, ANDR_BOOT_NAME_SIZE);
	andr_tmp_str[ANDR_BOOT_NAME_SIZE] = '\0';
	if (strlen(andr_tmp_str))
		printf("Android's image name: %s\n", andr_tmp_str);

	printf("Kernel load addr 0x%08x size %u KiB\n",
	       kernel_addr, DIV_ROUND_UP(hdr->kernel_size, 1024));

	int len = 0;
	if (*hdr->cmdline) {
		printf("Kernel command line: %s\n", hdr->cmdline);
		len += strlen(hdr->cmdline);
	}

	char *bootargs = env_get("bootargs");
	if (bootargs)
		len += strlen(bootargs);

	char *newbootargs = malloc(len + 2);
	if (!newbootargs) {
		puts("Error: malloc in android_image_get_kernel failed!\n");
		return -ENOMEM;
	}
	*newbootargs = '\0';

	if (bootargs) {
		strcpy(newbootargs, bootargs);
		strcat(newbootargs, " ");
	}
	if (*hdr->cmdline)
		strcat(newbootargs, hdr->cmdline);

	env_set("bootargs", newbootargs);

	if (os_data) {
		if (image_get_magic(ihdr) == IH_MAGIC) {
			*os_data = image_get_data(ihdr);
		} else {
			*os_data = (ulong)hdr;
			*os_data += hdr->page_size;
		}
	}
	if (os_len) {
		if (image_get_magic(ihdr) == IH_MAGIC)
			*os_len = image_get_data_size(ihdr);
		else
			*os_len = hdr->kernel_size;
	}
	return 0;
}

int android_image_check_header(const struct andr_img_hdr *hdr)
{
	return memcmp(ANDR_BOOT_MAGIC, hdr->magic, ANDR_BOOT_MAGIC_SIZE);
}

ulong android_image_get_end(const struct andr_img_hdr *hdr)
{
	ulong end;

	/*
	 * The header takes a full page, the remaining components are aligned
	 * on page boundary
	 */
	end = (ulong)hdr;
	end += hdr->page_size;
	end += ALIGN(hdr->kernel_size, hdr->page_size);
	end += ALIGN(hdr->ramdisk_size, hdr->page_size);
	end += ALIGN(hdr->second_size, hdr->page_size);

	if (hdr->header_version >= 1)
		end += ALIGN(hdr->recovery_dtbo_size, hdr->page_size);

	if (hdr->header_version >= 2)
		end += ALIGN(hdr->dtb_size, hdr->page_size);

	return end;
}

ulong android_image_get_kload(const struct andr_img_hdr *hdr)
{
	return android_image_get_kernel_addr(hdr);
}

ulong android_image_get_kcomp(const struct andr_img_hdr *hdr)
{
	const void *p = (void *)((uintptr_t)hdr + hdr->page_size);

	if (image_get_magic((image_header_t *)p) == IH_MAGIC)
		return image_get_comp((image_header_t *)p);
	else if (get_unaligned_le32(p) == LZ4F_MAGIC)
		return IH_COMP_LZ4;
	else
		return image_decomp_type(p, sizeof(u32));
}

int android_image_get_ramdisk(const struct andr_img_hdr *hdr,
			      ulong *rd_data, ulong *rd_len)
{
	if (!hdr->ramdisk_size) {
		*rd_data = *rd_len = 0;
		return -1;
	}

	printf("RAM disk load addr 0x%08x size %u KiB\n",
	       hdr->ramdisk_addr, DIV_ROUND_UP(hdr->ramdisk_size, 1024));

	*rd_data = (unsigned long)hdr;
	*rd_data += hdr->page_size;
	*rd_data += ALIGN(hdr->kernel_size, hdr->page_size);

	*rd_len = hdr->ramdisk_size;
	return 0;
}

int android_image_get_second(const struct andr_img_hdr *hdr,
			      ulong *second_data, ulong *second_len)
{
	if (!hdr->second_size) {
		*second_data = *second_len = 0;
		return -1;
	}

	*second_data = (unsigned long)hdr;
	*second_data += hdr->page_size;
	*second_data += ALIGN(hdr->kernel_size, hdr->page_size);
	*second_data += ALIGN(hdr->ramdisk_size, hdr->page_size);

	printf("second address is 0x%lx\n",*second_data);

	*second_len = hdr->second_size;
	return 0;
}

/**
 * android_image_get_dtbo() - Get address and size of recovery DTBO image.
 * @hdr_addr: Boot image header address
 * @addr: If not NULL, will contain address of recovery DTBO image
 * @size: If not NULL, will contain size of recovery DTBO image
 *
 * Get the address and size of DTBO image in "Recovery DTBO" area of Android
 * Boot Image in RAM. The format of this image is Android DTBO (see
 * corresponding "DTB/DTBO Partitions" AOSP documentation for details). Once
 * the address is obtained from this function, one can use 'adtimg' U-Boot
 * command or android_dt_*() functions to extract desired DTBO blob.
 *
 * This DTBO (included in boot image) is only needed for non-A/B devices, and it
 * only can be found in recovery image. On A/B devices we can always rely on
 * "dtbo" partition. See "Including DTBO in Recovery for Non-A/B Devices" in
 * AOSP documentation for details.
 *
 * Return: true on success or false on error.
 */
bool android_image_get_dtbo(ulong hdr_addr, ulong *addr, u32 *size)
{
	const struct andr_img_hdr *hdr;
	ulong dtbo_img_addr;
	bool ret = true;

	hdr = map_sysmem(hdr_addr, sizeof(*hdr));
	if (android_image_check_header(hdr)) {
		printf("Error: Boot Image header is incorrect\n");
		ret = false;
		goto exit;
	}

	if (hdr->header_version < 1) {
		printf("Error: header_version must be >= 1 to get dtbo\n");
		ret = false;
		goto exit;
	}

	if (hdr->recovery_dtbo_size == 0) {
		printf("Error: recovery_dtbo_size is 0\n");
		ret = false;
		goto exit;
	}

	/* Calculate the address of DTB area in boot image */
	dtbo_img_addr = hdr_addr;
	dtbo_img_addr += hdr->page_size;
	dtbo_img_addr += ALIGN(hdr->kernel_size, hdr->page_size);
	dtbo_img_addr += ALIGN(hdr->ramdisk_size, hdr->page_size);
	dtbo_img_addr += ALIGN(hdr->second_size, hdr->page_size);

	if (addr)
		*addr = dtbo_img_addr;
	if (size)
		*size = hdr->recovery_dtbo_size;

exit:
	unmap_sysmem(hdr);
	return ret;
}

/**
 * android_image_get_dtb_img_addr() - Get the address of DTB area in boot image.
 * @hdr_addr: Boot image header address
 * @addr: Will contain the address of DTB area in boot image
 *
 * Return: true on success or false on fail.
 */
static bool android_image_get_dtb_img_addr(ulong hdr_addr, ulong *addr)
{
	const struct andr_img_hdr *hdr;
	ulong dtb_img_addr;
	bool ret = true;

	hdr = map_sysmem(hdr_addr, sizeof(*hdr));
	if (android_image_check_header(hdr)) {
		printf("Error: Boot Image header is incorrect\n");
		ret = false;
		goto exit;
	}

	if (hdr->header_version < 2) {
		printf("Error: header_version must be >= 2 to get dtb\n");
		ret = false;
		goto exit;
	}

	if (hdr->dtb_size == 0) {
		printf("Error: dtb_size is 0\n");
		ret = false;
		goto exit;
	}

	/* Calculate the address of DTB area in boot image */
	dtb_img_addr = hdr_addr;
	dtb_img_addr += hdr->page_size;
	dtb_img_addr += ALIGN(hdr->kernel_size, hdr->page_size);
	dtb_img_addr += ALIGN(hdr->ramdisk_size, hdr->page_size);
	dtb_img_addr += ALIGN(hdr->second_size, hdr->page_size);
	dtb_img_addr += ALIGN(hdr->recovery_dtbo_size, hdr->page_size);

	*addr = dtb_img_addr;

exit:
	unmap_sysmem(hdr);
	return ret;
}

/**
 * android_image_get_dtb_by_index() - Get address and size of blob in DTB area.
 * @hdr_addr: Boot image header address
 * @index: Index of desired DTB in DTB area (starting from 0)
 * @addr: If not NULL, will contain address to specified DTB
 * @size: If not NULL, will contain size of specified DTB
 *
 * Get the address and size of DTB blob by its index in DTB area of Android
 * Boot Image in RAM.
 *
 * Return: true on success or false on error.
 */
bool android_image_get_dtb_by_index(ulong hdr_addr, u32 index, ulong *addr,
				    u32 *size)
{
	const struct andr_img_hdr *hdr;
	bool res;
	ulong dtb_img_addr;	/* address of DTB part in boot image */
	u32 dtb_img_size;	/* size of DTB payload in boot image */
	ulong dtb_addr;		/* address of DTB blob with specified index  */
	u32 i;			/* index iterator */

	res = android_image_get_dtb_img_addr(hdr_addr, &dtb_img_addr);
	if (!res)
		return false;

	/* Check if DTB area of boot image is in DTBO format */
	if (android_dt_check_header(dtb_img_addr)) {
		return android_dt_get_fdt_by_index(dtb_img_addr, index, addr,
						   size);
	}

	/* Find out the address of DTB with specified index in concat blobs */
	hdr = map_sysmem(hdr_addr, sizeof(*hdr));
	dtb_img_size = hdr->dtb_size;
	unmap_sysmem(hdr);
	i = 0;
	dtb_addr = dtb_img_addr;
	while (dtb_addr < dtb_img_addr + dtb_img_size) {
		const struct fdt_header *fdt;
		u32 dtb_size;

		fdt = map_sysmem(dtb_addr, sizeof(*fdt));
		if (fdt_check_header(fdt) != 0) {
			unmap_sysmem(fdt);
			printf("Error: Invalid FDT header for index %u\n", i);
			return false;
		}

		dtb_size = fdt_totalsize(fdt);
		unmap_sysmem(fdt);

		if (i == index) {
			if (size)
				*size = dtb_size;
			if (addr)
				*addr = dtb_addr;
			return true;
		}

		dtb_addr += dtb_size;
		++i;
	}

	printf("Error: Index is out of bounds (%u/%u)\n", index, i);
	return false;
}

#if !defined(CONFIG_SPL_BUILD)
/**
 * android_print_contents - prints out the contents of the Android format image
 * @hdr: pointer to the Android format image header
 *
 * android_print_contents() formats a multi line Android image contents
 * description.
 * The routine prints out Android image properties
 *
 * returns:
 *     no returned results
 */
void android_print_contents(const struct andr_img_hdr *hdr)
{
	const char * const p = IMAGE_INDENT_STRING;
	/* os_version = ver << 11 | lvl */
	u32 os_ver = hdr->os_version >> 11;
	u32 os_lvl = hdr->os_version & ((1U << 11) - 1);

	printf("%skernel size:          %x\n", p, hdr->kernel_size);
	printf("%skernel address:       %x\n", p, hdr->kernel_addr);
	printf("%sramdisk size:         %x\n", p, hdr->ramdisk_size);
	printf("%sramdisk address:      %x\n", p, hdr->ramdisk_addr);
	printf("%ssecond size:          %x\n", p, hdr->second_size);
	printf("%ssecond address:       %x\n", p, hdr->second_addr);
	printf("%stags address:         %x\n", p, hdr->tags_addr);
	printf("%spage size:            %x\n", p, hdr->page_size);
	/* ver = A << 14 | B << 7 | C         (7 bits for each of A, B, C)
	 * lvl = ((Y - 2000) & 127) << 4 | M  (7 bits for Y, 4 bits for M) */
	printf("%sos_version:           %x (ver: %u.%u.%u, level: %u.%u)\n",
	       p, hdr->os_version,
	       (os_ver >> 7) & 0x7F, (os_ver >> 14) & 0x7F, os_ver & 0x7F,
	       (os_lvl >> 4) + 2000, os_lvl & 0x0F);
	printf("%sname:                 %s\n", p, hdr->name);
	printf("%scmdline:              %s\n", p, hdr->cmdline);
	printf("%sheader_version:       %d\n", p, hdr->header_version);

	if (hdr->header_version >= 1) {
		printf("%srecovery dtbo size:   %x\n", p,
		       hdr->recovery_dtbo_size);
		printf("%srecovery dtbo offset: %llx\n", p,
		       hdr->recovery_dtbo_offset);
		printf("%sheader size:          %x\n", p,
		       hdr->header_size);
	}

	if (hdr->header_version >= 2) {
		printf("%sdtb size:             %x\n", p, hdr->dtb_size);
		printf("%sdtb addr:             %llx\n", p, hdr->dtb_addr);
	}
}

/**
 * android_image_print_dtb_info - Print info for one DTB blob in DTB area.
 * @fdt: DTB header
 * @index: Number of DTB blob in DTB area.
 *
 * Return: true on success or false on error.
 */
static bool android_image_print_dtb_info(const struct fdt_header *fdt,
					 u32 index)
{
	int root_node_off;
	u32 fdt_size;
	const char *model;
	const char *compatible;

	root_node_off = fdt_path_offset(fdt, "/");
	if (root_node_off < 0) {
		printf("Error: Root node not found\n");
		return false;
	}

	fdt_size = fdt_totalsize(fdt);
	compatible = fdt_getprop(fdt, root_node_off, "compatible",
				 NULL);
	model = fdt_getprop(fdt, root_node_off, "model", NULL);

	printf(" - DTB #%u:\n", index);
	printf("           (DTB)size = %d\n", fdt_size);
	printf("          (DTB)model = %s\n", model ? model : "(unknown)");
	printf("     (DTB)compatible = %s\n",
	       compatible ? compatible : "(unknown)");

	return true;
}

/**
 * android_image_print_dtb_contents() - Print info for DTB blobs in DTB area.
 * @hdr_addr: Boot image header address
 *
 * DTB payload in Android Boot Image v2+ can be in one of following formats:
 *   1. Concatenated DTB blobs
 *   2. Android DTBO format (see CONFIG_CMD_ADTIMG for details)
 *
 * This function does next:
 *   1. Prints out the format used in DTB area
 *   2. Iterates over all DTB blobs in DTB area and prints out the info for
 *      each blob.
 *
 * Return: true on success or false on error.
 */
bool android_image_print_dtb_contents(ulong hdr_addr)
{
	const struct andr_img_hdr *hdr;
	bool res;
	ulong dtb_img_addr;	/* address of DTB part in boot image */
	u32 dtb_img_size;	/* size of DTB payload in boot image */
	ulong dtb_addr;		/* address of DTB blob with specified index  */
	u32 i;			/* index iterator */

	res = android_image_get_dtb_img_addr(hdr_addr, &dtb_img_addr);
	if (!res)
		return false;

	/* Check if DTB area of boot image is in DTBO format */
	if (android_dt_check_header(dtb_img_addr)) {
		printf("## DTB area contents (DTBO format):\n");
		android_dt_print_contents(dtb_img_addr);
		return true;
	}

	printf("## DTB area contents (concat format):\n");

	/* Iterate over concatenated DTB blobs */
	hdr = map_sysmem(hdr_addr, sizeof(*hdr));
	dtb_img_size = hdr->dtb_size;
	unmap_sysmem(hdr);
	i = 0;
	dtb_addr = dtb_img_addr;
	while (dtb_addr < dtb_img_addr + dtb_img_size) {
		const struct fdt_header *fdt;
		u32 dtb_size;

		fdt = map_sysmem(dtb_addr, sizeof(*fdt));
		if (fdt_check_header(fdt) != 0) {
			unmap_sysmem(fdt);
			printf("Error: Invalid FDT header for index %u\n", i);
			return false;
		}

		res = android_image_print_dtb_info(fdt, i);
		if (!res) {
			unmap_sysmem(fdt);
			return false;
		}

		dtb_size = fdt_totalsize(fdt);
		unmap_sysmem(fdt);
		dtb_addr += dtb_size;
		++i;
	}

	return true;
}
#endif