summaryrefslogtreecommitdiff
path: root/arch/arm/imx-common/hab.c
blob: 67318250607dd23604d2d799c4a4dff23764289b (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
/*
 * Copyright (C) 2010-2015 Freescale Semiconductor, Inc.
 *
 * SPDX-License-Identifier:    GPL-2.0+
 */

#include <common.h>
#include <config.h>
#include <fuse.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/arch/clock.h>
#include <asm/arch/sys_proto.h>
#include <asm/imx-common/hab.h>

/* -------- start of HAB API updates ------------*/

#define hab_rvt_report_event_p					\
(								\
	(is_mx6dqp()) ?						\
	((hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT_NEW) :	\
	(is_mx6dq() && (soc_rev() >= CHIP_REV_1_5)) ?		\
	((hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT_NEW) :	\
	(is_mx6sdl() &&	(soc_rev() >= CHIP_REV_1_2)) ?		\
	((hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT_NEW) :	\
	((hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT)	\
)

#define hab_rvt_report_status_p					\
(								\
	(is_mx6dqp()) ?						\
	((hab_rvt_report_status_t *)HAB_RVT_REPORT_STATUS_NEW) :\
	(is_mx6dq() && (soc_rev() >= CHIP_REV_1_5)) ?		\
	((hab_rvt_report_status_t *)HAB_RVT_REPORT_STATUS_NEW) :\
	(is_mx6sdl() &&	(soc_rev() >= CHIP_REV_1_2)) ?		\
	((hab_rvt_report_status_t *)HAB_RVT_REPORT_STATUS_NEW) :\
	((hab_rvt_report_status_t *)HAB_RVT_REPORT_STATUS)	\
)

#define hab_rvt_authenticate_image_p				\
(								\
	(is_mx6dqp()) ?						\
	((hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE_NEW) : \
	(is_mx6dq() && (soc_rev() >= CHIP_REV_1_5)) ?		\
	((hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE_NEW) : \
	(is_mx6sdl() &&	(soc_rev() >= CHIP_REV_1_2)) ?		\
	((hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE_NEW) : \
	((hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE)	\
)

#define hab_rvt_entry_p						\
(								\
	(is_mx6dqp()) ?						\
	((hab_rvt_entry_t *)HAB_RVT_ENTRY_NEW) :		\
	(is_mx6dq() && (soc_rev() >= CHIP_REV_1_5)) ?		\
	((hab_rvt_entry_t *)HAB_RVT_ENTRY_NEW) :		\
	(is_mx6sdl() &&	(soc_rev() >= CHIP_REV_1_2)) ?		\
	((hab_rvt_entry_t *)HAB_RVT_ENTRY_NEW) :		\
	((hab_rvt_entry_t *)HAB_RVT_ENTRY)			\
)

#define hab_rvt_exit_p						\
(								\
	(is_mx6dqp()) ?						\
	((hab_rvt_exit_t *)HAB_RVT_EXIT_NEW) :			\
	(is_mx6dq() && (soc_rev() >= CHIP_REV_1_5)) ?		\
	((hab_rvt_exit_t *)HAB_RVT_EXIT_NEW) :			\
	(is_mx6sdl() &&	(soc_rev() >= CHIP_REV_1_2)) ?		\
	((hab_rvt_exit_t *)HAB_RVT_EXIT_NEW) :			\
	((hab_rvt_exit_t *)HAB_RVT_EXIT)			\
)

#define IVT_SIZE		0x20
#define ALIGN_SIZE		0x1000
#define CSF_PAD_SIZE		0x2000
#define MX6DQ_PU_IROM_MMU_EN_VAR	0x009024a8
#define MX6DLS_PU_IROM_MMU_EN_VAR	0x00901dd0
#define MX6SL_PU_IROM_MMU_EN_VAR	0x00900a18
#define IS_HAB_ENABLED_BIT \
	(is_soc_type(MXC_SOC_MX7) ? 0x2000000 : 0x2)

/*
 * +------------+  0x0 (DDR_UIMAGE_START) -
 * |   Header   |                          |
 * +------------+  0x40                    |
 * |            |                          |
 * |            |                          |
 * |            |                          |
 * |            |                          |
 * | Image Data |                          |
 * .            |                          |
 * .            |                           > Stuff to be authenticated ----+
 * .            |                          |                                |
 * |            |                          |                                |
 * |            |                          |                                |
 * +------------+                          |                                |
 * |            |                          |                                |
 * | Fill Data  |                          |                                |
 * |            |                          |                                |
 * +------------+ Align to ALIGN_SIZE      |                                |
 * |    IVT     |                          |                                |
 * +------------+ + IVT_SIZE              -                                 |
 * |            |                                                           |
 * |  CSF DATA  | <---------------------------------------------------------+
 * |            |
 * +------------+
 * |            |
 * | Fill Data  |
 * |            |
 * +------------+ + CSF_PAD_SIZE
 */

#define MAX_RECORD_BYTES     (8*1024) /* 4 kbytes */

struct record {
	uint8_t  tag;						/* Tag */
	uint8_t  len[2];					/* Length */
	uint8_t  par;						/* Version */
	uint8_t  contents[MAX_RECORD_BYTES];/* Record Data */
	bool	 any_rec_flag;
};

char *rsn_str[] = {"RSN = HAB_RSN_ANY (0x00)\n",
				   "RSN = HAB_ENG_FAIL (0x30)\n",
				   "RSN = HAB_INV_ADDRESS (0x22)\n",
				   "RSN = HAB_INV_ASSERTION (0x0C)\n",
				   "RSN = HAB_INV_CALL (0x28)\n",
				   "RSN = HAB_INV_CERTIFICATE (0x21)\n",
				   "RSN = HAB_INV_COMMAND (0x06)\n",
				   "RSN = HAB_INV_CSF (0x11)\n",
				   "RSN = HAB_INV_DCD (0x27)\n",
				   "RSN = HAB_INV_INDEX (0x0F)\n",
				   "RSN = HAB_INV_IVT (0x05)\n",
				   "RSN = HAB_INV_KEY (0x1D)\n",
				   "RSN = HAB_INV_RETURN (0x1E)\n",
				   "RSN = HAB_INV_SIGNATURE (0x18)\n",
				   "RSN = HAB_INV_SIZE (0x17)\n",
				   "RSN = HAB_MEM_FAIL (0x2E)\n",
				   "RSN = HAB_OVR_COUNT (0x2B)\n",
				   "RSN = HAB_OVR_STORAGE (0x2D)\n",
				   "RSN = HAB_UNS_ALGORITHM (0x12)\n",
				   "RSN = HAB_UNS_COMMAND (0x03)\n",
				   "RSN = HAB_UNS_ENGINE (0x0A)\n",
				   "RSN = HAB_UNS_ITEM (0x24)\n",
				   "RSN = HAB_UNS_KEY (0x1B)\n",
				   "RSN = HAB_UNS_PROTOCOL (0x14)\n",
				   "RSN = HAB_UNS_STATE (0x09)\n",
				   "RSN = INVALID\n",
				   NULL};

char *sts_str[] = {"STS = HAB_SUCCESS (0xF0)\n",
				   "STS = HAB_FAILURE (0x33)\n",
				   "STS = HAB_WARNING (0x69)\n",
				   "STS = INVALID\n",
				   NULL};

char *eng_str[] = {"ENG = HAB_ENG_ANY (0x00)\n",
				   "ENG = HAB_ENG_SCC (0x03)\n",
				   "ENG = HAB_ENG_RTIC (0x05)\n",
				   "ENG = HAB_ENG_SAHARA (0x06)\n",
				   "ENG = HAB_ENG_CSU (0x0A)\n",
				   "ENG = HAB_ENG_SRTC (0x0C)\n",
				   "ENG = HAB_ENG_DCP (0x1B)\n",
				   "ENG = HAB_ENG_CAAM (0x1D)\n",
				   "ENG = HAB_ENG_SNVS (0x1E)\n",
				   "ENG = HAB_ENG_OCOTP (0x21)\n",
				   "ENG = HAB_ENG_DTCP (0x22)\n",
				   "ENG = HAB_ENG_ROM (0x36)\n",
				   "ENG = HAB_ENG_HDCP (0x24)\n",
				   "ENG = HAB_ENG_RTL (0x77)\n",
				   "ENG = HAB_ENG_SW (0xFF)\n",
				   "ENG = INVALID\n",
				   NULL};

char *ctx_str[] = {"CTX = HAB_CTX_ANY(0x00)\n",
				   "CTX = HAB_CTX_FAB (0xFF)\n",
				   "CTX = HAB_CTX_ENTRY (0xE1)\n",
				   "CTX = HAB_CTX_TARGET (0x33)\n",
				   "CTX = HAB_CTX_AUTHENTICATE (0x0A)\n",
				   "CTX = HAB_CTX_DCD (0xDD)\n",
				   "CTX = HAB_CTX_CSF (0xCF)\n",
				   "CTX = HAB_CTX_COMMAND (0xC0)\n",
				   "CTX = HAB_CTX_AUT_DAT (0xDB)\n",
				   "CTX = HAB_CTX_ASSERT (0xA0)\n",
				   "CTX = HAB_CTX_EXIT (0xEE)\n",
				   "CTX = INVALID\n",
				   NULL};

uint8_t hab_statuses[5] = {
	HAB_STS_ANY,
	HAB_FAILURE,
	HAB_WARNING,
	HAB_SUCCESS,
	-1
};

uint8_t hab_reasons[26] = {
	HAB_RSN_ANY,
	HAB_ENG_FAIL,
	HAB_INV_ADDRESS,
	HAB_INV_ASSERTION,
	HAB_INV_CALL,
	HAB_INV_CERTIFICATE,
	HAB_INV_COMMAND,
	HAB_INV_CSF,
	HAB_INV_DCD,
	HAB_INV_INDEX,
	HAB_INV_IVT,
	HAB_INV_KEY,
	HAB_INV_RETURN,
	HAB_INV_SIGNATURE,
	HAB_INV_SIZE,
	HAB_MEM_FAIL,
	HAB_OVR_COUNT,
	HAB_OVR_STORAGE,
	HAB_UNS_ALGORITHM,
	HAB_UNS_COMMAND,
	HAB_UNS_ENGINE,
	HAB_UNS_ITEM,
	HAB_UNS_KEY,
	HAB_UNS_PROTOCOL,
	HAB_UNS_STATE,
	-1
};

uint8_t hab_contexts[12] = {
	HAB_CTX_ANY,
	HAB_CTX_FAB,
	HAB_CTX_ENTRY,
	HAB_CTX_TARGET,
	HAB_CTX_AUTHENTICATE,
	HAB_CTX_DCD,
	HAB_CTX_CSF,
	HAB_CTX_COMMAND,
	HAB_CTX_AUT_DAT,
	HAB_CTX_ASSERT,
	HAB_CTX_EXIT,
	-1
};

uint8_t hab_engines[16] = {
	HAB_ENG_ANY,
	HAB_ENG_SCC,
	HAB_ENG_RTIC,
	HAB_ENG_SAHARA,
	HAB_ENG_CSU,
	HAB_ENG_SRTC,
	HAB_ENG_DCP,
	HAB_ENG_CAAM,
	HAB_ENG_SNVS,
	HAB_ENG_OCOTP,
	HAB_ENG_DTCP,
	HAB_ENG_ROM,
	HAB_ENG_HDCP,
	HAB_ENG_RTL,
	HAB_ENG_SW,
	-1
};

bool is_hab_enabled(void)
{
	struct imx_sec_config_fuse_t *fuse =
		(struct imx_sec_config_fuse_t *)&imx_sec_config_fuse;
	uint32_t reg;
	int ret;

	ret = fuse_read(fuse->bank, fuse->word, &reg);
	if (ret) {
		puts("\nSecure boot fuse read error\n");
		return ret;
	}

	return (reg & IS_HAB_ENABLED_BIT) == IS_HAB_ENABLED_BIT;
}

static inline uint8_t get_idx(uint8_t *list, uint8_t tgt)
{
	uint8_t idx = 0;
	uint8_t element = list[idx];
	while (element != -1) {
		if (element == tgt)
			return idx;
		element = list[++idx];
	}
	return -1;
}

void process_event_record(uint8_t *event_data, size_t bytes)
{
	struct record *rec = (struct record *)event_data;

	printf("\n\n%s", sts_str[get_idx(hab_statuses, rec->contents[0])]);
	printf("%s", rsn_str[get_idx(hab_reasons, rec->contents[1])]);
	printf("%s", ctx_str[get_idx(hab_contexts, rec->contents[2])]);
	printf("%s", eng_str[get_idx(hab_engines, rec->contents[3])]);
}

void display_event(uint8_t *event_data, size_t bytes)
{
	uint32_t i;

	if (!(event_data && bytes > 0))
		return;

	for (i = 0; i < bytes; i++) {
		if (i == 0)
			printf("\t0x%02x", event_data[i]);
		else if ((i % 8) == 0)
			printf("\n\t0x%02x", event_data[i]);
		else
			printf(" 0x%02x", event_data[i]);
	}

	process_event_record(event_data, bytes);
}

int get_hab_status(void)
{
	uint32_t index = 0; /* Loop index */
	uint8_t event_data[128]; /* Event data buffer */
	size_t bytes = sizeof(event_data); /* Event size in bytes */
	enum hab_config config = 0;
	enum hab_state state = 0;
	hab_rvt_report_event_t *hab_rvt_report_event;
	hab_rvt_report_status_t *hab_rvt_report_status;

	hab_rvt_report_event = hab_rvt_report_event_p;
	hab_rvt_report_status = hab_rvt_report_status_p;

	if (is_hab_enabled())
		puts("\nSecure boot enabled\n");
	else
		puts("\nSecure boot disabled\n");

	/* Check HAB status */
	if (hab_rvt_report_status(&config, &state) != HAB_SUCCESS) {
		printf("\nHAB Configuration: 0x%02x, HAB State: 0x%02x\n",
		       config, state);

		/* Display HAB Error events */
		while (hab_rvt_report_event(HAB_FAILURE, index, event_data,
					&bytes) == HAB_SUCCESS) {
			puts("\n");
			printf("--------- HAB Event %d -----------------\n",
			       index + 1);
			puts("event data:\n");
			display_event(event_data, bytes);
			puts("\n");
			bytes = sizeof(event_data);
			index++;
		}
	}
	/* Display message if no HAB events are found */
	else {
		printf("\nHAB Configuration: 0x%02x, HAB State: 0x%02x\n",
		       config, state);
		puts("No HAB Events Found!\n\n");
	}
	return 0;
}

uint32_t authenticate_image(uint32_t ddr_start, uint32_t image_size)
{
	uint32_t load_addr = 0;
	size_t bytes;
	ptrdiff_t ivt_offset = 0;
	int result = 0;
	ulong start;
	hab_rvt_authenticate_image_t *hab_rvt_authenticate_image;
	hab_rvt_entry_t *hab_rvt_entry;
	hab_rvt_exit_t *hab_rvt_exit;

	hab_rvt_authenticate_image = hab_rvt_authenticate_image_p;
	hab_rvt_entry = hab_rvt_entry_p;
	hab_rvt_exit = hab_rvt_exit_p;

	if (is_hab_enabled()) {
		printf("\nAuthenticate image from DDR location 0x%x...\n",
		       ddr_start);

		hab_caam_clock_enable(1);

		if (hab_rvt_entry() == HAB_SUCCESS) {
			/* If not already aligned, Align to ALIGN_SIZE */
			ivt_offset = (image_size + ALIGN_SIZE - 1) &
					~(ALIGN_SIZE - 1);

			start = ddr_start;
			bytes = ivt_offset + IVT_SIZE + CSF_PAD_SIZE;
#ifdef DEBUG
			printf("\nivt_offset = 0x%x, ivt addr = 0x%x\n",
			       ivt_offset, ddr_start + ivt_offset);
			puts("Dumping IVT\n");
			print_buffer(ddr_start + ivt_offset,
				     (void *)(ddr_start + ivt_offset),
				     4, 0x8, 0);

			puts("Dumping CSF Header\n");
			print_buffer(ddr_start + ivt_offset+IVT_SIZE,
				     (void *)(ddr_start + ivt_offset+IVT_SIZE),
				     4, 0x10, 0);

			get_hab_status();

			puts("\nCalling authenticate_image in ROM\n");
			printf("\tivt_offset = 0x%x\n", ivt_offset);
			printf("\tstart = 0x%08lx\n", start);
			printf("\tbytes = 0x%x\n", bytes);
#endif
			/*
			 * If the MMU is enabled, we have to notify the ROM
			 * code, or it won't flush the caches when needed.
			 * This is done, by setting the "pu_irom_mmu_enabled"
			 * word to 1. You can find its address by looking in
			 * the ROM map. This is critical for
			 * authenticate_image(). If MMU is enabled, without
			 * setting this bit, authentication will fail and may
			 * crash.
			 */
			/* Check MMU enabled */
			if (is_soc_type(MXC_SOC_MX6) && get_cr() & CR_M) {
				if (is_mx6dq()) {
					/*
					 * This won't work on Rev 1.0.0 of
					 * i.MX6Q/D, since their ROM doesn't
					 * do cache flushes. don't think any
					 * exist, so we ignore them.
					 */
					if (!is_mx6dqp())
						writel(1, MX6DQ_PU_IROM_MMU_EN_VAR);
				} else if (is_mx6sdl()) {
					writel(1, MX6DLS_PU_IROM_MMU_EN_VAR);
				} else if (is_mx6sl()) {
					writel(1, MX6SL_PU_IROM_MMU_EN_VAR);
				}
			}

			load_addr = (uint32_t)hab_rvt_authenticate_image(
					HAB_CID_UBOOT,
					ivt_offset, (void **)&start,
					(size_t *)&bytes, NULL);
			if (hab_rvt_exit() != HAB_SUCCESS) {
				puts("hab exit function fail\n");
				load_addr = 0;
			}
		} else {
			puts("hab entry function fail\n");
		}

		hab_caam_clock_enable(0);

		get_hab_status();
	} else {
		puts("hab fuse not enabled\n");
	}

	if ((!is_hab_enabled()) || (load_addr != 0))
		result = 1;

	return result;
}

int do_hab_status(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	if ((argc != 1)) {
		cmd_usage(cmdtp);
		return 1;
	}

	get_hab_status();

	return 0;
}

static int do_authenticate_image(cmd_tbl_t *cmdtp, int flag, int argc,
				char * const argv[])
{
	ulong	addr, ivt_offset;
	int	rcode = 0;

	if (argc < 3)
		return CMD_RET_USAGE;

	addr = simple_strtoul(argv[1], NULL, 16);
	ivt_offset = simple_strtoul(argv[2], NULL, 16);

	rcode = authenticate_image(addr, ivt_offset);

	return rcode;
}

U_BOOT_CMD(
		hab_status, CONFIG_SYS_MAXARGS, 1, do_hab_status,
		"display HAB status",
		""
	  );

U_BOOT_CMD(
		hab_auth_img, 3, 0, do_authenticate_image,
		"authenticate image via HAB",
		"addr ivt_offset\n"
		"addr - image hex address\n"
		"ivt_offset - hex offset of IVT in the image"
	  );