summaryrefslogtreecommitdiff
path: root/src/arch/x86/smbios.c
blob: 70793741faa50c3e5f9701163b22d526b86f851a (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
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>,
 * Raptor Engineering
 * Copyright (C) 2011 Sven Schnelle <svens@stackframe.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2 of
 * the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <stdlib.h>
#include <string.h>
#include <smbios.h>
#include <console/console.h>
#include <version.h>
#include <device/device.h>
#include <arch/cpu.h>
#include <cpu/x86/name.h>
#include <elog.h>
#include <endian.h>
#include <memory_info.h>
#include <spd.h>
#include <cbmem.h>
#if IS_ENABLED(CONFIG_CHROMEOS)
#include <vendorcode/google/chromeos/gnvs.h>
#endif

static u8 smbios_checksum(u8 *p, u32 length)
{
	u8 ret = 0;
	while (length--)
		ret += *p++;
	return -ret;
}


int smbios_add_string(u8 *start, const char *str)
{
	int i = 1;
	char *p = (char *)start;

	/*
	 * Return 0 as required for empty strings.
	 * See Section 6.1.3 "Text Strings" of the SMBIOS specification.
	 */
	if (*str == '\0')
		return 0;

	for (;;) {
		if (!*p) {
			strcpy(p, str);
			p += strlen(str);
			*p++ = '\0';
			*p++ = '\0';
			return i;
		}

		if (!strcmp(p, str))
			return i;

		p += strlen(p)+1;
		i++;
	}
}

int smbios_string_table_len(u8 *start)
{
	char *p = (char *)start;
	int i, len = 0;

	while (*p) {
		i = strlen(p) + 1;
		p += i;
		len += i;
	}

	if (!len)
		return 2;

	return len + 1;
}

static int smbios_cpu_vendor(u8 *start)
{
	if (cpu_have_cpuid()) {
		u32 tmp[4];
		const struct cpuid_result res = cpuid(0);
		tmp[0] = res.ebx;
		tmp[1] = res.edx;
		tmp[2] = res.ecx;
		tmp[3] = 0;
		return smbios_add_string(start, (const char *)tmp);
	} else {
		return smbios_add_string(start, "Unknown");
	}
}

static int smbios_processor_name(u8 *start)
{
	u32 tmp[13];
	const char *str = "Unknown Processor Name";
	if (cpu_have_cpuid()) {
		int i;
		struct cpuid_result res = cpuid(0x80000000);
		if (res.eax >= 0x80000004) {
			int j = 0;
			for (i = 0; i < 3; i++) {
				res = cpuid(0x80000002 + i);
				tmp[j++] = res.eax;
				tmp[j++] = res.ebx;
				tmp[j++] = res.ecx;
				tmp[j++] = res.edx;
			}
			tmp[12] = 0;
			str = (const char *)tmp;
		}
	}
	return smbios_add_string(start, str);
}

/* this function will fill the corresponding manufacturer */
void smbios_fill_dimm_manufacturer_from_id(uint16_t mod_id,
	struct smbios_type17 *t)
{
	switch (mod_id) {
	case 0x2c80:
		t->manufacturer = smbios_add_string(t->eos,
						    "Crucial");
		break;
	case 0x4304:
		t->manufacturer = smbios_add_string(t->eos,
						    "Ramaxel");
		break;
	case 0x4f01:
		t->manufacturer = smbios_add_string(t->eos,
						    "Transcend");
		break;
	case 0x9801:
		t->manufacturer = smbios_add_string(t->eos,
						    "Kingston");
		break;
	case 0x987f:
		t->manufacturer = smbios_add_string(t->eos,
						    "Hynix");
		break;
	case 0x9e02:
		t->manufacturer = smbios_add_string(t->eos,
						    "Corsair");
		break;
	case 0xb004:
		t->manufacturer = smbios_add_string(t->eos,
						    "OCZ");
		break;
	case 0xad80:
		t->manufacturer = smbios_add_string(t->eos,
						    "Hynix/Hyundai");
		break;
	case 0xb502:
		t->manufacturer = smbios_add_string(t->eos,
						    "SuperTalent");
		break;
	case 0xcd04:
		t->manufacturer = smbios_add_string(t->eos,
						    "GSkill");
		break;
	case 0xce80:
		t->manufacturer = smbios_add_string(t->eos,
						    "Samsung");
		break;
	case 0xfe02:
		t->manufacturer = smbios_add_string(t->eos,
						    "Elpida");
		break;
	case 0xff2c:
		t->manufacturer = smbios_add_string(t->eos,
						    "Micron");
		break;
	default: {
			char string_buffer[256];

			snprintf(string_buffer, sizeof(string_buffer),
						"Unknown (%x)", mod_id);
			t->manufacturer = smbios_add_string(t->eos,
							    string_buffer);
			break;
		}
	}
}

static void trim_trailing_whitespace(char *buffer, size_t buffer_size)
{
	size_t len = strnlen(buffer, buffer_size);

	if (len == 0)
		return;

	for (char *p = buffer + len - 1; p >= buffer; --p) {
		if (*p == ' ')
			*p = 0;
		else
			break;
	}
}

/** This function will fill the corresponding part number */
static void smbios_fill_dimm_part_number(const char *part_number,
					 struct smbios_type17 *t)
{
	const size_t trimmed_buffer_size = DIMM_INFO_PART_NUMBER_SIZE;

	int invalid;
	size_t i, len;
	char trimmed_part_number[trimmed_buffer_size];

	strncpy(trimmed_part_number, part_number, trimmed_buffer_size);
	trimmed_part_number[trimmed_buffer_size - 1] = '\0';

	/*
	 * SPD mandates that unused characters be represented with a ' '.
	 * We don't want to publish the whitespace in the SMBIOS tables.
	 */
	trim_trailing_whitespace(trimmed_part_number, trimmed_buffer_size);

	len = strlen(trimmed_part_number);

	invalid = 0; /* assume valid */
	for (i = 0; i < len - 1; i++) {
		if (trimmed_part_number[i] < ' ') {
			invalid = 1;
			trimmed_part_number[i] = '*';
		}
	}

	if (invalid) {
		char string_buffer[trimmed_buffer_size +
				   10 /* strlen("Invalid ()") */];

		snprintf(string_buffer, sizeof(string_buffer), "Invalid (%s)",
			 trimmed_part_number);
		t->part_number = smbios_add_string(t->eos, string_buffer);
	} else {
		t->part_number = smbios_add_string(t->eos, trimmed_part_number);
	}
}

static int create_smbios_type17_for_dimm(struct dimm_info *dimm,
					 unsigned long *current, int *handle)
{
	struct smbios_type17 *t = (struct smbios_type17 *)*current;
	char locator[40];

	memset(t, 0, sizeof(struct smbios_type17));
	t->memory_type = dimm->ddr_type;
	t->clock_speed = dimm->ddr_frequency;
	t->speed = dimm->ddr_frequency;
	t->type = SMBIOS_MEMORY_DEVICE;
	if (dimm->dimm_size < 0x7fff) {
		t->size = dimm->dimm_size;
	} else {
		t->size = 0x7fff;
		t->extended_size = dimm->dimm_size & 0x7fffffff;
	}
	t->data_width = 8 * (1 << (dimm->bus_width & 0x7));
	t->total_width = t->data_width + 8 * ((dimm->bus_width & 0x18) >> 3);

	switch (dimm->mod_type) {
	case SPD_RDIMM:
	case SPD_MINI_RDIMM:
		t->form_factor = MEMORY_FORMFACTOR_RIMM;
		break;
	case SPD_UDIMM:
	case SPD_MICRO_DIMM:
	case SPD_MINI_UDIMM:
		t->form_factor = MEMORY_FORMFACTOR_DIMM;
		break;
	case SPD_SODIMM:
		t->form_factor = MEMORY_FORMFACTOR_SODIMM;
		break;
	default:
		t->form_factor = MEMORY_FORMFACTOR_UNKNOWN;
		break;
	}

	smbios_fill_dimm_manufacturer_from_id(dimm->mod_id, t);
	/* put '\0' in the end of data */
	dimm->serial[DIMM_INFO_SERIAL_SIZE - 1] = '\0';
	if (dimm->serial[0] == 0)
		t->serial_number = smbios_add_string(t->eos, "None");
	else
		t->serial_number = smbios_add_string(t->eos,
						   (const char *)dimm->serial);

	snprintf(locator, sizeof(locator), "Channel-%d-DIMM-%d",
		dimm->channel_num, dimm->dimm_num);
	t->device_locator = smbios_add_string(t->eos, locator);

	snprintf(locator, sizeof(locator), "BANK %d", dimm->bank_locator);
	t->bank_locator = smbios_add_string(t->eos, locator);

	/* put '\0' in the end of data */
	dimm->module_part_number[DIMM_INFO_PART_NUMBER_SIZE - 1] = '\0';
	smbios_fill_dimm_part_number((char *)dimm->module_part_number, t);

	/* Synchronous = 1 */
	t->type_detail = 0x0080;
	/* no handle for error information */
	t->memory_error_information_handle = 0xFFFE;
	t->attributes = dimm->rank_per_dimm;
	t->handle = *handle;
	*handle += 1;
	t->length = sizeof(struct smbios_type17) - 2;
	return t->length + smbios_string_table_len(t->eos);
}

const char *__attribute__((weak)) smbios_mainboard_bios_version(void)
{
	if (strlen(CONFIG_LOCALVERSION))
		return CONFIG_LOCALVERSION;
	else
		return coreboot_version;
}

static int smbios_write_type0(unsigned long *current, int handle)
{
	struct smbios_type0 *t = (struct smbios_type0 *)*current;
	int len = sizeof(struct smbios_type0);

	memset(t, 0, sizeof(struct smbios_type0));
	t->type = SMBIOS_BIOS_INFORMATION;
	t->handle = handle;
	t->length = len - 2;

	t->vendor = smbios_add_string(t->eos, "coreboot");
#if !IS_ENABLED(CONFIG_CHROMEOS)
	t->bios_release_date = smbios_add_string(t->eos, coreboot_dmi_date);

	t->bios_version = smbios_add_string(t->eos,
		smbios_mainboard_bios_version());
#else
#define SPACES \
	"                                                                  "
	t->bios_release_date = smbios_add_string(t->eos, coreboot_dmi_date);
#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
	u32 version_offset = (u32)smbios_string_table_len(t->eos);
#endif
	t->bios_version = smbios_add_string(t->eos, SPACES);

#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
	/* SMBIOS offsets start at 1 rather than 0 */
	vboot_data->vbt10 = (u32)t->eos + (version_offset - 1);
#endif
#endif /* CONFIG_CHROMEOS */

	/* As a work around to prevent a compiler error, temporarily specify
	 * 16 MiB flash sizes when ROM size >= 16 MiB.  An update is necessary
	 * once the SMBIOS specification addresses ROM sizes > 16 MiB.
	 */
	uint32_t rom_size = CONFIG_ROM_SIZE;
	rom_size = MIN(CONFIG_ROM_SIZE, 16 * MiB);
	t->bios_rom_size = (rom_size / 65535) - 1;

	t->system_bios_major_release = 4;
	t->bios_characteristics =
		BIOS_CHARACTERISTICS_PCI_SUPPORTED |
		BIOS_CHARACTERISTICS_SELECTABLE_BOOT |
		BIOS_CHARACTERISTICS_UPGRADEABLE;

	if (IS_ENABLED(CONFIG_CARDBUS_PLUGIN_SUPPORT))
		t->bios_characteristics |= BIOS_CHARACTERISTICS_PC_CARD;

	if (IS_ENABLED(CONFIG_HAVE_ACPI_TABLES))
		t->bios_characteristics_ext1 = BIOS_EXT1_CHARACTERISTICS_ACPI;

	t->bios_characteristics_ext2 = BIOS_EXT2_CHARACTERISTICS_TARGET;
	len = t->length + smbios_string_table_len(t->eos);
	*current += len;
	return len;
}

#if !IS_ENABLED(CONFIG_SMBIOS_PROVIDED_BY_MOBO)

const char *__attribute__((weak)) smbios_mainboard_serial_number(void)
{
	return CONFIG_MAINBOARD_SERIAL_NUMBER;
}

const char *__attribute__((weak)) smbios_mainboard_version(void)
{
	return CONFIG_MAINBOARD_VERSION;
}

const char *__attribute__((weak)) smbios_mainboard_manufacturer(void)
{
	return CONFIG_MAINBOARD_SMBIOS_MANUFACTURER;
}

const char *__attribute__((weak)) smbios_mainboard_product_name(void)
{
	return CONFIG_MAINBOARD_SMBIOS_PRODUCT_NAME;
}

void __attribute__((weak)) smbios_mainboard_set_uuid(u8 *uuid)
{
	/* leave all zero */
}
#endif

const char *__attribute__((weak)) smbios_mainboard_asset_tag(void)
{
	return "";
}

u8 __attribute__((weak)) smbios_mainboard_feature_flags(void)
{
	return 0;
}

const char *__attribute__((weak)) smbios_mainboard_location_in_chassis(void)
{
	return "";
}

smbios_board_type __attribute__((weak)) smbios_mainboard_board_type(void)
{
	return SMBIOS_BOARD_TYPE_UNKNOWN;
}

const char *__attribute__((weak)) smbios_mainboard_sku(void)
{
	return "";
}

#ifdef CONFIG_MAINBOARD_FAMILY
const char *smbios_mainboard_family(void)
{
	return CONFIG_MAINBOARD_FAMILY;
}
#endif /* CONFIG_MAINBOARD_FAMILY */

static int smbios_write_type1(unsigned long *current, int handle)
{
	struct smbios_type1 *t = (struct smbios_type1 *)*current;
	int len = sizeof(struct smbios_type1);

	memset(t, 0, sizeof(struct smbios_type1));
	t->type = SMBIOS_SYSTEM_INFORMATION;
	t->handle = handle;
	t->length = len - 2;
	t->manufacturer = smbios_add_string(t->eos,
		smbios_mainboard_manufacturer());
	t->product_name = smbios_add_string(t->eos,
		smbios_mainboard_product_name());
	t->serial_number = smbios_add_string(t->eos,
		smbios_mainboard_serial_number());
	t->sku = smbios_add_string(t->eos, smbios_mainboard_sku());
	t->version = smbios_add_string(t->eos, smbios_mainboard_version());
#ifdef CONFIG_MAINBOARD_FAMILY
	t->family = smbios_add_string(t->eos, smbios_mainboard_family());
#endif
	smbios_mainboard_set_uuid(t->uuid);
	len = t->length + smbios_string_table_len(t->eos);
	*current += len;
	return len;
}

static int smbios_write_type2(unsigned long *current, int handle,
			      const int chassis_handle)
{
	struct smbios_type2 *t = (struct smbios_type2 *)*current;
	int len = sizeof(struct smbios_type2);

	memset(t, 0, sizeof(struct smbios_type2));
	t->type = SMBIOS_BOARD_INFORMATION;
	t->handle = handle;
	t->length = len - 2;
	t->manufacturer = smbios_add_string(t->eos,
		smbios_mainboard_manufacturer());
	t->product_name = smbios_add_string(t->eos,
		smbios_mainboard_product_name());
	t->serial_number = smbios_add_string(t->eos,
		smbios_mainboard_serial_number());
	t->version = smbios_add_string(t->eos, smbios_mainboard_version());
	t->asset_tag = smbios_add_string(t->eos, smbios_mainboard_asset_tag());
	t->feature_flags = smbios_mainboard_feature_flags();
	t->location_in_chassis = smbios_add_string(t->eos,
		smbios_mainboard_location_in_chassis());
	t->board_type = smbios_mainboard_board_type();
	t->chassis_handle = chassis_handle;
	len = t->length + smbios_string_table_len(t->eos);
	*current += len;
	return len;
}

static int smbios_write_type3(unsigned long *current, int handle)
{
	struct smbios_type3 *t = (struct smbios_type3 *)*current;
	int len = sizeof(struct smbios_type3);

	memset(t, 0, sizeof(struct smbios_type3));
	t->type = SMBIOS_SYSTEM_ENCLOSURE;
	t->handle = handle;
	t->length = len - 2;
	t->manufacturer = smbios_add_string(t->eos,
		smbios_mainboard_manufacturer());
	t->bootup_state = SMBIOS_STATE_SAFE;
	t->power_supply_state = SMBIOS_STATE_SAFE;
	t->thermal_state = SMBIOS_STATE_SAFE;
	t->_type = CONFIG_SMBIOS_ENCLOSURE_TYPE;
	t->security_status = SMBIOS_STATE_SAFE;
	len = t->length + smbios_string_table_len(t->eos);
	*current += len;
	return len;
}

static int smbios_write_type4(unsigned long *current, int handle)
{
	struct cpuid_result res;
	struct smbios_type4 *t = (struct smbios_type4 *)*current;
	int len = sizeof(struct smbios_type4);

	/* Provide sane defaults even for CPU without CPUID */
	res.eax = res.edx = 0;
	res.ebx = 0x10000;

	if (cpu_have_cpuid())
		res = cpuid(1);

	memset(t, 0, sizeof(struct smbios_type4));
	t->type = SMBIOS_PROCESSOR_INFORMATION;
	t->handle = handle;
	t->length = len - 2;
	t->processor_id[0] = res.eax;
	t->processor_id[1] = res.edx;
	t->processor_manufacturer = smbios_cpu_vendor(t->eos);
	t->processor_version = smbios_processor_name(t->eos);
	t->processor_family = (res.eax > 0) ? 0x0c : 0x6;
	t->processor_type = 3; /* System Processor */
	t->processor_upgrade = 0x06;
	t->core_count = (res.ebx >> 16) & 0xff;
	t->l1_cache_handle = 0xffff;
	t->l2_cache_handle = 0xffff;
	t->l3_cache_handle = 0xffff;
	t->processor_upgrade = 1;
	len = t->length + smbios_string_table_len(t->eos);
	*current += len;
	return len;
}

static int smbios_write_type11(unsigned long *current, int *handle)
{
	struct smbios_type11 *t = (struct smbios_type11 *)*current;
	int len;
	struct device *dev;

	memset(t, 0, sizeof(*t));
	t->type = SMBIOS_OEM_STRINGS;
	t->handle = *handle;
	t->length = len = sizeof(*t) - 2;

	for (dev = all_devices; dev; dev = dev->next) {
		if (dev->ops && dev->ops->get_smbios_strings)
			dev->ops->get_smbios_strings(dev, t);
	}

	if (t->count == 0) {
		memset(t, 0, sizeof(*t));
		return 0;
	}

	len += smbios_string_table_len(t->eos);

	*current += len;
	(*handle)++;
	return len;
}

static int smbios_write_type17(unsigned long *current, int *handle)
{
	int len = sizeof(struct smbios_type17);
	int totallen = 0;
	int i;

	struct memory_info *meminfo;
	meminfo = cbmem_find(CBMEM_ID_MEMINFO);
	if (meminfo == NULL)
		return 0;	/* can't find mem info in cbmem */

	printk(BIOS_INFO, "Create SMBIOS type 17\n");
	for (i = 0; i < meminfo->dimm_cnt && i < ARRAY_SIZE(meminfo->dimm);
		i++) {
		struct dimm_info *dimm;
		dimm = &meminfo->dimm[i];
		len = create_smbios_type17_for_dimm(dimm, current, handle);
		*current += len;
		totallen += len;
	}
	return totallen;
}

static int smbios_write_type32(unsigned long *current, int handle)
{
	struct smbios_type32 *t = (struct smbios_type32 *)*current;
	int len = sizeof(struct smbios_type32);

	memset(t, 0, sizeof(struct smbios_type32));
	t->type = SMBIOS_SYSTEM_BOOT_INFORMATION;
	t->handle = handle;
	t->length = len - 2;
	*current += len;
	return len;
}

int smbios_write_type41(unsigned long *current, int *handle,
			const char *name, u8 instance, u16 segment,
			u8 bus, u8 device, u8 function)
{
	struct smbios_type41 *t = (struct smbios_type41 *)*current;
	int len = sizeof(struct smbios_type41);

	memset(t, 0, sizeof(struct smbios_type41));
	t->type = SMBIOS_ONBOARD_DEVICES_EXTENDED_INFORMATION;
	t->handle = *handle;
	t->length = len - 2;
	t->reference_designation = smbios_add_string(t->eos, name);
	t->device_type = SMBIOS_DEVICE_TYPE_OTHER;
	t->device_status = 1;
	t->device_type_instance = instance;
	t->segment_group_number = segment;
	t->bus_number = bus;
	t->device_number = device;
	t->function_number = function;

	len = t->length + smbios_string_table_len(t->eos);
	*current += len;
	*handle += 1;
	return len;
}

static int smbios_write_type127(unsigned long *current, int handle)
{
	struct smbios_type127 *t = (struct smbios_type127 *)*current;
	int len = sizeof(struct smbios_type127);

	memset(t, 0, sizeof(struct smbios_type127));
	t->type = SMBIOS_END_OF_TABLE;
	t->handle = handle;
	t->length = len - 2;
	*current += len;
	return len;
}

static int smbios_walk_device_tree(struct device *tree, int *handle,
	unsigned long *current)
{
	struct device *dev;
	int len = 0;

	for (dev = tree; dev; dev = dev->next) {
		printk(BIOS_INFO, "%s (%s)\n", dev_path(dev), dev_name(dev));

		if (dev->ops && dev->ops->get_smbios_data)
			len += dev->ops->get_smbios_data(dev, handle, current);
	}
	return len;
}

#define update_max(len, max_len, stmt)		\
	do {					\
		int tmp = stmt;			\
						\
		max_len = MAX(max_len, tmp);	\
		len += tmp;			\
	} while (0)

unsigned long smbios_write_tables(unsigned long current)
{
	struct smbios_entry *se;
	unsigned long tables;
	int len = 0;
	int max_struct_size = 0;
	int handle = 0;

	current = ALIGN(current, 16);
	printk(BIOS_DEBUG, "%s: %08lx\n", __func__, current);

	se = (struct smbios_entry *)current;
	current += sizeof(struct smbios_entry);
	current = ALIGN(current, 16);

	tables = current;
	update_max(len, max_struct_size, smbios_write_type0(&current,
		handle++));
	update_max(len, max_struct_size, smbios_write_type1(&current,
		handle++));
	update_max(len, max_struct_size, smbios_write_type2(&current,
		handle, handle + 1)); /* The chassis handle is the next one */
	handle++;
	update_max(len, max_struct_size, smbios_write_type3(&current,
		handle++));
	update_max(len, max_struct_size, smbios_write_type4(&current,
		handle++));
	update_max(len, max_struct_size, smbios_write_type11(&current,
		&handle));
	if (IS_ENABLED(CONFIG_ELOG))
		update_max(len, max_struct_size,
			elog_smbios_write_type15(&current,handle++));
	update_max(len, max_struct_size, smbios_write_type17(&current,
		&handle));
	update_max(len, max_struct_size, smbios_write_type32(&current,
		handle++));

	update_max(len, max_struct_size, smbios_walk_device_tree(all_devices,
		&handle, &current));

	update_max(len, max_struct_size, smbios_write_type127(&current,
		handle++));

	memset(se, 0, sizeof(struct smbios_entry));
	memcpy(se->anchor, "_SM_", 4);
	se->length = sizeof(struct smbios_entry);
	se->major_version = 2;
	se->minor_version = 7;
	se->max_struct_size = max_struct_size;
	se->struct_count = handle;
	memcpy(se->intermediate_anchor_string, "_DMI_", 5);

	se->struct_table_address = (u32)tables;
	se->struct_table_length = len;

	se->intermediate_checksum = smbios_checksum((u8 *)se + 0x10,
						    sizeof(struct smbios_entry)
						    - 0x10);
	se->checksum = smbios_checksum((u8 *)se, sizeof(struct smbios_entry));
	return current;
}