aboutsummaryrefslogtreecommitdiffstats
path: root/tools/power/acpi/acpidump.c
blob: a84553a0e0df105862395bbf9c6a7740c8ce6588 (plain) (blame)
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
/*
 * (c) Alexey Starikovskiy, Intel, 2005-2006.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#ifdef DEFINE_ALTERNATE_TYPES
/* hack to enable building old application with new headers -lenb */
#define acpi_fadt_descriptor acpi_table_fadt
#define acpi_rsdp_descriptor acpi_table_rsdp
#define DSDT_SIG ACPI_SIG_DSDT
#define FACS_SIG ACPI_SIG_FACS
#define FADT_SIG ACPI_SIG_FADT
#define xfirmware_ctrl Xfacs
#define firmware_ctrl facs

typedef int				s32;
typedef unsigned char			u8;
typedef unsigned short			u16;
typedef unsigned int			u32;
typedef unsigned long long		u64;
typedef long long			s64;
#endif

#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <getopt.h>

#include <dirent.h>

#include <acpi/acconfig.h>
#include <acpi/platform/acenv.h>
#include <acpi/actypes.h>
#include <acpi/actbl.h>

static inline u8 checksum(u8 * buffer, u32 length)
{
	u8 sum = 0, *i = buffer;
	buffer += length;
	for (; i < buffer; sum += *(i++));
	return sum;
}

static unsigned long psz, addr, length;
static int print, connect, skip;
static u8 select_sig[4];

static unsigned long read_efi_systab( void )
{
	char buffer[80];
	unsigned long addr;
	FILE *f = fopen("/sys/firmware/efi/systab", "r");
	if (f) {
		while (fgets(buffer, 80, f)) {
			if (sscanf(buffer, "ACPI20=0x%lx", &addr) == 1)
				return addr;
		}
		fclose(f);
	}
	return 0;
}

static u8 *acpi_map_memory(unsigned long where, unsigned length)
{
	unsigned long offset;
	u8 *there;
	int fd = open("/dev/mem", O_RDONLY);
	if (fd < 0) {
		fprintf(stderr, "acpi_os_map_memory: cannot open /dev/mem\n");
		exit(1);
	}
	offset = where % psz;
	there = mmap(NULL, length + offset, PROT_READ, MAP_PRIVATE,
			 fd, where - offset);
	close(fd);
	if (there == MAP_FAILED) return 0;
	return (there + offset);
}

static void acpi_unmap_memory(u8 * there, unsigned length)
{
	unsigned long offset = (unsigned long)there % psz;
	munmap(there - offset, length + offset);
}

static struct acpi_table_header *acpi_map_table(unsigned long where, char *sig)
{
	unsigned size;
	struct acpi_table_header *tbl = (struct acpi_table_header *)
	    acpi_map_memory(where, sizeof(struct acpi_table_header));
	if (!tbl || (sig && memcmp(sig, tbl->signature, 4))) return 0;
	size = tbl->length;
	acpi_unmap_memory((u8 *) tbl, sizeof(struct acpi_table_header));
	return (struct acpi_table_header *)acpi_map_memory(where, size);
}

static void acpi_unmap_table(struct acpi_table_header *tbl)
{
	acpi_unmap_memory((u8 *)tbl, tbl->length);
}

static struct acpi_rsdp_descriptor *acpi_scan_for_rsdp(u8 *begin, u32 length)
{
	struct acpi_rsdp_descriptor *rsdp;
	u8 *i, *end = begin + length;
	/* Search from given start address for the requested length */
	for (i = begin; i < end; i += ACPI_RSDP_SCAN_STEP) {
		/* The signature and checksum must both be correct */
		if (memcmp((char *)i, "RSD PTR ", 8)) continue;
		rsdp = (struct acpi_rsdp_descriptor *)i;
		/* Signature matches, check the appropriate checksum */
		if (!checksum((u8 *) rsdp, (rsdp->revision < 2) ?
			      ACPI_RSDP_CHECKSUM_LENGTH :
			      ACPI_RSDP_XCHECKSUM_LENGTH))
			/* Checksum valid, we have found a valid RSDP */
			return rsdp;
	}
	/* Searched entire block, no RSDP was found */
	return 0;
}

/*
 * Output data
 */
static void acpi_show_data(int fd, u8 * data, int size)
{
	char buffer[256];
	int len;
	int i, remain = size;
	while (remain > 0) {
		len = snprintf(buffer, 256, "  %04x:", size - remain);
		for (i = 0; i < 16 && i < remain; i++) {
			len +=
			    snprintf(&buffer[len], 256 - len, " %02x", data[i]);
		}
		for (; i < 16; i++) {
			len += snprintf(&buffer[len], 256 - len, "   ");
		}
		len += snprintf(&buffer[len], 256 - len, "  ");
		for (i = 0; i < 16 && i < remain; i++) {
			buffer[len++] = (isprint(data[i])) ? data[i] : '.';
		}
		buffer[len++] = '\n';
		write(fd, buffer, len);
		data += 16;
		remain -= 16;
	}
}

/*
 * Output ACPI table
 */
static void acpi_show_table(int fd, struct acpi_table_header *table, unsigned long addr)
{
	char buff[80];
	int len = snprintf(buff, 80, "%.4s @ %p\n", table->signature, (void *)addr);
	write(fd, buff, len);
	acpi_show_data(fd, (u8 *) table, table->length);
	buff[0] = '\n';
	write(fd, buff, 1);
}

static void write_table(int fd, struct acpi_table_header *tbl, unsigned long addr)
{
	static int select_done = 0;
	if (!select_sig[0]) {
		if (print) {
			acpi_show_table(fd, tbl, addr);
		} else {
			write(fd, tbl, tbl->length);
		}
	} else if (!select_done && !memcmp(select_sig, tbl->signature, 4)) {
		if (skip > 0) {
			--skip;
			return;
		}
		if (print) {
			acpi_show_table(fd, tbl, addr);
		} else {
			write(fd, tbl, tbl->length);
		}
		select_done = 1;
	}
}

static void acpi_dump_FADT(int fd, struct acpi_table_header *tbl, unsigned long xaddr) {
	struct acpi_fadt_descriptor x;
	unsigned long addr;
	size_t len = sizeof(struct acpi_fadt_descriptor);
	if (len > tbl->length) len = tbl->length;
	memcpy(&x, tbl, len);
	x.header.length = len;
	if (checksum((u8 *)tbl, len)) {
		fprintf(stderr, "Wrong checksum for FADT!\n");
	}
	if (x.header.length >= 148 && x.Xdsdt) {
		addr = (unsigned long)x.Xdsdt;
		if (connect) {
			x.Xdsdt = lseek(fd, 0, SEEK_CUR);
		}
	} else if (x.header.length >= 44 && x.dsdt) {
		addr = (unsigned long)x.dsdt;
		if (connect) {
			x.dsdt = lseek(fd, 0, SEEK_CUR);
		}
	} else {
		fprintf(stderr, "No DSDT in FADT!\n");
		goto no_dsdt;
	}
	tbl = acpi_map_table(addr, DSDT_SIG);
	if (!tbl) goto no_dsdt;
	if (checksum((u8 *)tbl, tbl->length))
		fprintf(stderr, "Wrong checksum for DSDT!\n");
	write_table(fd, tbl, addr);
	acpi_unmap_table(tbl);
no_dsdt:
	if (x.header.length >= 140 && x.xfirmware_ctrl) {
		addr = (unsigned long)x.xfirmware_ctrl;
		if (connect) {
			x.xfirmware_ctrl = lseek(fd, 0, SEEK_CUR);
		}
	} else if (x.header.length >= 40 && x.firmware_ctrl) {
		addr = (unsigned long)x.firmware_ctrl;
		if (connect) {
			x.firmware_ctrl = lseek(fd, 0, SEEK_CUR);
		}
	} else {
		fprintf(stderr, "No FACS in FADT!\n");
		goto no_facs;
	}
	tbl = acpi_map_table(addr, FACS_SIG);
	if (!tbl) goto no_facs;
	/* do not checksum FACS */
	write_table(fd, tbl, addr);
	acpi_unmap_table(tbl);
no_facs:
	write_table(fd, (struct acpi_table_header *)&x, xaddr);
}

static int acpi_dump_SDT(int fd, struct acpi_rsdp_descriptor *rsdp)
{
	struct acpi_table_header *sdt, *tbl = 0;
	int xsdt = 1, i, num;
	char *offset;
	unsigned long addr;
	if (rsdp->revision > 1 && rsdp->xsdt_physical_address) {
		tbl = acpi_map_table(rsdp->xsdt_physical_address, "XSDT");
	}
	if (!tbl && rsdp->rsdt_physical_address) {
		xsdt = 0;
		tbl = acpi_map_table(rsdp->rsdt_physical_address, "RSDT");
	}
	if (!tbl) return 0;
	sdt = malloc(tbl->length);
	memcpy(sdt, tbl, tbl->length);
	acpi_unmap_table(tbl);
	if (checksum((u8 *)sdt, sdt->length))
		fprintf(stderr, "Wrong checksum for %s!\n", (xsdt)?"XSDT":"RSDT");
	num = (sdt->length - sizeof(struct acpi_table_header))/((xsdt)?sizeof(u64):sizeof(u32));
	offset = (char *)sdt + sizeof(struct acpi_table_header);
	for (i = 0; i < num; ++i, offset += ((xsdt) ? sizeof(u64) : sizeof(u32))) {
		addr = (xsdt) ? (unsigned long)(*(u64 *)offset):
				(unsigned long)(*(u32 *)offset);
		if (!addr) continue;
		tbl = acpi_map_table(addr, 0);
		if (!tbl) continue;
		if (!memcmp(tbl->signature, FADT_SIG, 4)) {
			acpi_dump_FADT(fd, tbl, addr);
		} else {
			if (checksum((u8 *)tbl, tbl->length))
				fprintf(stderr, "Wrong checksum for generic table!\n");
			write_table(fd, tbl, addr);
		}
		acpi_unmap_table(tbl);
		if (connect) {
			if (xsdt)
				(*(u64*)offset) = lseek(fd, 0, SEEK_CUR);
			else
				(*(u32*)offset) = lseek(fd, 0, SEEK_CUR);
		}
	}
	if (xsdt) {
		addr = (unsigned long)rsdp->xsdt_physical_address;
		if (connect) {
			rsdp->xsdt_physical_address = lseek(fd, 0, SEEK_CUR);
		}
	} else {
		addr = (unsigned long)rsdp->rsdt_physical_address;
		if (connect) {
			rsdp->rsdt_physical_address = lseek(fd, 0, SEEK_CUR);
		}
	}
	write_table(fd, sdt, addr);
	free (sdt);
	return 1;
}

#define DYNAMIC_SSDT	"/sys/firmware/acpi/tables/dynamic"

static void acpi_dump_dynamic_SSDT(int fd)
{
	struct stat file_stat;
	char filename[256], *ptr;
	DIR *tabledir;
	struct dirent *entry;
	FILE *fp;
	int count, readcount, length;
	struct acpi_table_header table_header, *ptable;

	if (stat(DYNAMIC_SSDT, &file_stat) == -1) {
		/* The directory doesn't exist */
		return;
	}
	tabledir = opendir(DYNAMIC_SSDT);
	if(!tabledir){
		/*can't open the directory */
		return;
         }

	while ((entry = readdir(tabledir)) != 0){
		/* skip the file of . /.. */
		if (entry->d_name[0] == '.')
			continue;

		sprintf(filename, "%s/%s", DYNAMIC_SSDT, entry->d_name);
		fp = fopen(filename, "r");
		if (fp == NULL) {
			fprintf(stderr, "Can't open the file of %s\n",
						filename);
			continue;
		}
		/* Read the Table header to parse the table length */
		count = fread(&table_header, 1, sizeof(struct acpi_table_header), fp);
		if (count < sizeof(table_header)) {
			/* the length is lessn than ACPI table header. skip it */
			fclose(fp);
			continue;
		}
		length = table_header.length;
		ptr = malloc(table_header.length);
		fseek(fp, 0, SEEK_SET);
		readcount = 0;
		while(!feof(fp) && readcount < length) {
			count = fread(ptr + readcount, 1, 256, fp);
			readcount += count;
		}
		fclose(fp);
		ptable = (struct acpi_table_header *) ptr;
		if (checksum((u8 *) ptable, ptable->length))
			fprintf(stderr, "Wrong checksum "
					"for dynamic SSDT table!\n");
		write_table(fd, ptable, 0);
		free(ptr);
	}
	closedir(tabledir);
	return;
}

static void usage(const char *progname)
{
	puts("Usage:");
	printf("%s [--addr 0x1234][--table DSDT][--output filename]"
		"[--binary][--length 0x456][--help]\n", progname);
	puts("\t--addr 0x1234 or -a 0x1234 -- look for tables at this physical address");
	puts("\t--table DSDT or -t DSDT -- only dump table with DSDT signature");
	puts("\t--output filename or -o filename -- redirect output from stdin to filename");
	puts("\t--binary or -b -- dump data in binary form rather than in hex-dump format");
	puts("\t--length 0x456 or -l 0x456 -- works only with --addr, dump physical memory"
		"\n\t\tregion without trying to understand it's contents");
	puts("\t--skip 2 or -s 2 -- skip 2 tables of the given name and output only 3rd one");
	puts("\t--help or -h -- this help message");
	exit(0);
}

static struct option long_options[] = {
	{"addr", 1, 0, 0},
	{"table", 1, 0, 0},
	{"output", 1, 0, 0},
	{"binary", 0, 0, 0},
	{"length", 1, 0, 0},
	{"skip", 1, 0, 0},
	{"help", 0, 0, 0},
	{0, 0, 0, 0}
};
int main(int argc, char **argv)
{
	int option_index, c, fd;
	u8 *raw;
	struct acpi_rsdp_descriptor rsdpx, *x = 0;
	char *filename = 0;
	char buff[80];
	memset(select_sig, 0, 4);
	print = 1;
	connect = 0;
	addr = length = 0;
	skip = 0;
	while (1) {
		option_index = 0;
		c = getopt_long(argc, argv, "a:t:o:bl:s:h",
				    long_options, &option_index);
		if (c == -1)
			break;

		switch (c) {
		case 0:
			switch (option_index) {
			case 0:
				addr = strtoul(optarg, (char **)NULL, 16);
				break;
			case 1:
				memcpy(select_sig, optarg, 4);
				break;
			case 2:
				filename = optarg;
				break;
			case 3:
				print = 0;
				break;
			case 4:
				length = strtoul(optarg, (char **)NULL, 16);
				break;
			case 5:
				skip = strtoul(optarg, (char **)NULL, 10);
				break;
			case 6:
				usage(argv[0]);
				exit(0);
			}
			break;
		case 'a':
			addr = strtoul(optarg, (char **)NULL, 16);
			break;
		case 't':
			memcpy(select_sig, optarg, 4);
			break;
		case 'o':
			filename = optarg;
			break;
		case 'b':
			print = 0;
			break;
		case 'l':
			length = strtoul(optarg, (char **)NULL, 16);
			break;
		case 's':
			skip = strtoul(optarg, (char **)NULL, 10);
			break;
		case 'h':
			usage(argv[0]);
			exit(0);
		default:
			printf("Unknown option!\n");
			usage(argv[0]);
			exit(0);
		}
	}

	fd = STDOUT_FILENO;
	if (filename) {
		fd = creat(filename, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
		if (fd < 0)
			return fd;
	}

	if (!select_sig[0] && !print) {
		connect = 1;
	}

	psz = sysconf(_SC_PAGESIZE);
	if (length && addr) {
		/* We know length and address, it means we just want a memory dump */
		if (!(raw = acpi_map_memory(addr, length)))
			goto not_found;
		write(fd, raw, length);
		acpi_unmap_memory(raw, length);
		close(fd);
		return 0;
	}

	length = sizeof(struct acpi_rsdp_descriptor);
	if (!addr) {
		addr = read_efi_systab();
		if (!addr) {
			addr = ACPI_HI_RSDP_WINDOW_BASE;
			length = ACPI_HI_RSDP_WINDOW_SIZE;
		}
	}

	if (!(raw = acpi_map_memory(addr, length)) ||
	    !(x = acpi_scan_for_rsdp(raw, length)))
		goto not_found;

	/* Find RSDP and print all found tables */
	memcpy(&rsdpx, x, sizeof(struct acpi_rsdp_descriptor));
	acpi_unmap_memory(raw, length);
	if (connect) {
		lseek(fd, sizeof(struct acpi_rsdp_descriptor), SEEK_SET);
	}
	if (!acpi_dump_SDT(fd, &rsdpx))
		goto not_found;
	if (connect) {
		lseek(fd, 0, SEEK_SET);
		write(fd, x, (rsdpx.revision < 2) ?
			ACPI_RSDP_CHECKSUM_LENGTH : ACPI_RSDP_XCHECKSUM_LENGTH);
	} else if (!select_sig[0] || !memcmp("RSD PTR ", select_sig, 4)) {
		addr += (long)x - (long)raw;
		length = snprintf(buff, 80, "RSD PTR @ %p\n", (void *)addr);
		write(fd, buff, length);
		acpi_show_data(fd, (u8 *) & rsdpx, (rsdpx.revision < 2) ?
				ACPI_RSDP_CHECKSUM_LENGTH : ACPI_RSDP_XCHECKSUM_LENGTH);
		buff[0] = '\n';
		write(fd, buff, 1);
	}
	acpi_dump_dynamic_SSDT(fd);
	close(fd);
	return 0;
not_found:
	close(fd);
	fprintf(stderr, "ACPI tables were not found. If you know location "
		"of RSD PTR table (from dmesg, etc), "
		"supply it with either --addr or -a option\n");
	return 1;
}