2 * (c) Alexey Starikovskiy, Intel, 2005-2006.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions, and the following disclaimer,
10 * without modification.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 * substantially similar to the "NO WARRANTY" disclaimer below
13 * ("Disclaimer") and any redistribution must be conditioned upon
14 * including a substantially similar Disclaimer requirement for further
15 * binary redistribution.
16 * 3. Neither the names of the above-listed copyright holders nor the names
17 * of any contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
33 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
34 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGES.
38 #ifdef DEFINE_ALTERNATE_TYPES
39 /* hack to enable building old application with new headers -lenb */
40 #define acpi_fadt_descriptor acpi_table_fadt
41 #define acpi_rsdp_descriptor acpi_table_rsdp
42 #define DSDT_SIG ACPI_SIG_DSDT
43 #define FACS_SIG ACPI_SIG_FACS
44 #define FADT_SIG ACPI_SIG_FADT
45 #define xfirmware_ctrl Xfacs
46 #define firmware_ctrl facs
49 typedef unsigned char u8;
50 typedef unsigned short u16;
51 typedef unsigned int u32;
52 typedef unsigned long long u64;
53 typedef long long s64;
57 #include <sys/types.h>
67 #include <acpi/acconfig.h>
68 #include <acpi/platform/acenv.h>
69 #include <acpi/actypes.h>
70 #include <acpi/actbl.h>
72 static inline u8 checksum(u8 * buffer, u32 length)
74 u8 sum = 0, *i = buffer;
76 for (; i < buffer; sum += *(i++));
80 static unsigned long psz, addr, length;
81 static int print, connect, skip;
82 static u8 select_sig[4];
84 static unsigned long read_efi_systab( void )
88 FILE *f = fopen("/sys/firmware/efi/systab", "r");
90 while (fgets(buffer, 80, f)) {
91 if (sscanf(buffer, "ACPI20=0x%lx", &addr) == 1)
99 static u8 *acpi_map_memory(unsigned long where, unsigned length)
101 unsigned long offset;
103 int fd = open("/dev/mem", O_RDONLY);
105 fprintf(stderr, "acpi_os_map_memory: cannot open /dev/mem\n");
108 offset = where % psz;
109 there = mmap(NULL, length + offset, PROT_READ, MAP_PRIVATE,
112 if (there == MAP_FAILED) return 0;
113 return (there + offset);
116 static void acpi_unmap_memory(u8 * there, unsigned length)
118 unsigned long offset = (unsigned long)there % psz;
119 munmap(there - offset, length + offset);
122 static struct acpi_table_header *acpi_map_table(unsigned long where, char *sig)
125 struct acpi_table_header *tbl = (struct acpi_table_header *)
126 acpi_map_memory(where, sizeof(struct acpi_table_header));
127 if (!tbl || (sig && memcmp(sig, tbl->signature, 4))) return 0;
129 acpi_unmap_memory((u8 *) tbl, sizeof(struct acpi_table_header));
130 return (struct acpi_table_header *)acpi_map_memory(where, size);
133 static void acpi_unmap_table(struct acpi_table_header *tbl)
135 acpi_unmap_memory((u8 *)tbl, tbl->length);
138 static struct acpi_rsdp_descriptor *acpi_scan_for_rsdp(u8 *begin, u32 length)
140 struct acpi_rsdp_descriptor *rsdp;
141 u8 *i, *end = begin + length;
142 /* Search from given start address for the requested length */
143 for (i = begin; i < end; i += ACPI_RSDP_SCAN_STEP) {
144 /* The signature and checksum must both be correct */
145 if (memcmp((char *)i, "RSD PTR ", 8)) continue;
146 rsdp = (struct acpi_rsdp_descriptor *)i;
147 /* Signature matches, check the appropriate checksum */
148 if (!checksum((u8 *) rsdp, (rsdp->revision < 2) ?
149 ACPI_RSDP_CHECKSUM_LENGTH :
150 ACPI_RSDP_XCHECKSUM_LENGTH))
151 /* Checksum valid, we have found a valid RSDP */
154 /* Searched entire block, no RSDP was found */
161 static void acpi_show_data(int fd, u8 * data, int size)
165 int i, remain = size;
167 len = snprintf(buffer, 256, " %04x:", size - remain);
168 for (i = 0; i < 16 && i < remain; i++) {
170 snprintf(&buffer[len], 256 - len, " %02x", data[i]);
172 for (; i < 16; i++) {
173 len += snprintf(&buffer[len], 256 - len, " ");
175 len += snprintf(&buffer[len], 256 - len, " ");
176 for (i = 0; i < 16 && i < remain; i++) {
177 buffer[len++] = (isprint(data[i])) ? data[i] : '.';
179 buffer[len++] = '\n';
180 write(fd, buffer, len);
189 static void acpi_show_table(int fd, struct acpi_table_header *table, unsigned long addr)
192 int len = snprintf(buff, 80, "%.4s @ %p\n", table->signature, (void *)addr);
193 write(fd, buff, len);
194 acpi_show_data(fd, (u8 *) table, table->length);
199 static void write_table(int fd, struct acpi_table_header *tbl, unsigned long addr)
201 static int select_done = 0;
202 if (!select_sig[0]) {
204 acpi_show_table(fd, tbl, addr);
206 write(fd, tbl, tbl->length);
208 } else if (!select_done && !memcmp(select_sig, tbl->signature, 4)) {
214 acpi_show_table(fd, tbl, addr);
216 write(fd, tbl, tbl->length);
222 static void acpi_dump_FADT(int fd, struct acpi_table_header *tbl, unsigned long xaddr) {
223 struct acpi_fadt_descriptor x;
225 size_t len = sizeof(struct acpi_fadt_descriptor);
226 if (len > tbl->length) len = tbl->length;
227 memcpy(&x, tbl, len);
228 x.header.length = len;
229 if (checksum((u8 *)tbl, len)) {
230 fprintf(stderr, "Wrong checksum for FADT!\n");
232 if (x.header.length >= 148 && x.Xdsdt) {
233 addr = (unsigned long)x.Xdsdt;
235 x.Xdsdt = lseek(fd, 0, SEEK_CUR);
237 } else if (x.header.length >= 44 && x.dsdt) {
238 addr = (unsigned long)x.dsdt;
240 x.dsdt = lseek(fd, 0, SEEK_CUR);
243 fprintf(stderr, "No DSDT in FADT!\n");
246 tbl = acpi_map_table(addr, DSDT_SIG);
247 if (!tbl) goto no_dsdt;
248 if (checksum((u8 *)tbl, tbl->length))
249 fprintf(stderr, "Wrong checksum for DSDT!\n");
250 write_table(fd, tbl, addr);
251 acpi_unmap_table(tbl);
253 if (x.header.length >= 140 && x.xfirmware_ctrl) {
254 addr = (unsigned long)x.xfirmware_ctrl;
256 x.xfirmware_ctrl = lseek(fd, 0, SEEK_CUR);
258 } else if (x.header.length >= 40 && x.firmware_ctrl) {
259 addr = (unsigned long)x.firmware_ctrl;
261 x.firmware_ctrl = lseek(fd, 0, SEEK_CUR);
264 fprintf(stderr, "No FACS in FADT!\n");
267 tbl = acpi_map_table(addr, FACS_SIG);
268 if (!tbl) goto no_facs;
269 /* do not checksum FACS */
270 write_table(fd, tbl, addr);
271 acpi_unmap_table(tbl);
273 write_table(fd, (struct acpi_table_header *)&x, xaddr);
276 static int acpi_dump_SDT(int fd, struct acpi_rsdp_descriptor *rsdp)
278 struct acpi_table_header *sdt, *tbl = 0;
279 int xsdt = 1, i, num;
282 if (rsdp->revision > 1 && rsdp->xsdt_physical_address) {
283 tbl = acpi_map_table(rsdp->xsdt_physical_address, "XSDT");
285 if (!tbl && rsdp->rsdt_physical_address) {
287 tbl = acpi_map_table(rsdp->rsdt_physical_address, "RSDT");
290 sdt = malloc(tbl->length);
291 memcpy(sdt, tbl, tbl->length);
292 acpi_unmap_table(tbl);
293 if (checksum((u8 *)sdt, sdt->length))
294 fprintf(stderr, "Wrong checksum for %s!\n", (xsdt)?"XSDT":"RSDT");
295 num = (sdt->length - sizeof(struct acpi_table_header))/((xsdt)?sizeof(u64):sizeof(u32));
296 offset = (char *)sdt + sizeof(struct acpi_table_header);
297 for (i = 0; i < num; ++i, offset += ((xsdt) ? sizeof(u64) : sizeof(u32))) {
298 addr = (xsdt) ? (unsigned long)(*(u64 *)offset):
299 (unsigned long)(*(u32 *)offset);
301 tbl = acpi_map_table(addr, 0);
303 if (!memcmp(tbl->signature, FADT_SIG, 4)) {
304 acpi_dump_FADT(fd, tbl, addr);
306 if (checksum((u8 *)tbl, tbl->length))
307 fprintf(stderr, "Wrong checksum for generic table!\n");
308 write_table(fd, tbl, addr);
310 acpi_unmap_table(tbl);
313 (*(u64*)offset) = lseek(fd, 0, SEEK_CUR);
315 (*(u32*)offset) = lseek(fd, 0, SEEK_CUR);
319 addr = (unsigned long)rsdp->xsdt_physical_address;
321 rsdp->xsdt_physical_address = lseek(fd, 0, SEEK_CUR);
324 addr = (unsigned long)rsdp->rsdt_physical_address;
326 rsdp->rsdt_physical_address = lseek(fd, 0, SEEK_CUR);
329 write_table(fd, sdt, addr);
334 #define DYNAMIC_SSDT "/sys/firmware/acpi/tables/dynamic"
336 static void acpi_dump_dynamic_SSDT(int fd)
338 struct stat file_stat;
339 char filename[256], *ptr;
341 struct dirent *entry;
343 int count, readcount, length;
344 struct acpi_table_header table_header, *ptable;
346 if (stat(DYNAMIC_SSDT, &file_stat) == -1) {
347 /* The directory doesn't exist */
350 tabledir = opendir(DYNAMIC_SSDT);
352 /*can't open the directory */
356 while ((entry = readdir(tabledir)) != 0){
357 /* skip the file of . /.. */
358 if (entry->d_name[0] == '.')
361 sprintf(filename, "%s/%s", DYNAMIC_SSDT, entry->d_name);
362 fp = fopen(filename, "r");
364 fprintf(stderr, "Can't open the file of %s\n",
368 /* Read the Table header to parse the table length */
369 count = fread(&table_header, 1, sizeof(struct acpi_table_header), fp);
370 if (count < sizeof(table_header)) {
371 /* the length is lessn than ACPI table header. skip it */
375 length = table_header.length;
376 ptr = malloc(table_header.length);
377 fseek(fp, 0, SEEK_SET);
379 while(!feof(fp) && readcount < length) {
380 count = fread(ptr + readcount, 1, 256, fp);
384 ptable = (struct acpi_table_header *) ptr;
385 if (checksum((u8 *) ptable, ptable->length))
386 fprintf(stderr, "Wrong checksum "
387 "for dynamic SSDT table!\n");
388 write_table(fd, ptable, 0);
395 static void usage(const char *progname)
398 printf("%s [--addr 0x1234][--table DSDT][--output filename]"
399 "[--binary][--length 0x456][--help]\n", progname);
400 puts("\t--addr 0x1234 or -a 0x1234 -- look for tables at this physical address");
401 puts("\t--table DSDT or -t DSDT -- only dump table with DSDT signature");
402 puts("\t--output filename or -o filename -- redirect output from stdin to filename");
403 puts("\t--binary or -b -- dump data in binary form rather than in hex-dump format");
404 puts("\t--length 0x456 or -l 0x456 -- works only with --addr, dump physical memory"
405 "\n\t\tregion without trying to understand it's contents");
406 puts("\t--skip 2 or -s 2 -- skip 2 tables of the given name and output only 3rd one");
407 puts("\t--help or -h -- this help message");
411 static struct option long_options[] = {
421 int main(int argc, char **argv)
423 int option_index, c, fd;
425 struct acpi_rsdp_descriptor rsdpx, *x = 0;
428 memset(select_sig, 0, 4);
435 c = getopt_long(argc, argv, "a:t:o:bl:s:h",
436 long_options, &option_index);
442 switch (option_index) {
444 addr = strtoul(optarg, (char **)NULL, 16);
447 memcpy(select_sig, optarg, 4);
456 length = strtoul(optarg, (char **)NULL, 16);
459 skip = strtoul(optarg, (char **)NULL, 10);
467 addr = strtoul(optarg, (char **)NULL, 16);
470 memcpy(select_sig, optarg, 4);
479 length = strtoul(optarg, (char **)NULL, 16);
482 skip = strtoul(optarg, (char **)NULL, 10);
488 printf("Unknown option!\n");
496 fd = creat(filename, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
501 if (!select_sig[0] && !print) {
505 psz = sysconf(_SC_PAGESIZE);
506 if (length && addr) {
507 /* We know length and address, it means we just want a memory dump */
508 if (!(raw = acpi_map_memory(addr, length)))
510 write(fd, raw, length);
511 acpi_unmap_memory(raw, length);
516 length = sizeof(struct acpi_rsdp_descriptor);
518 addr = read_efi_systab();
520 addr = ACPI_HI_RSDP_WINDOW_BASE;
521 length = ACPI_HI_RSDP_WINDOW_SIZE;
525 if (!(raw = acpi_map_memory(addr, length)) ||
526 !(x = acpi_scan_for_rsdp(raw, length)))
529 /* Find RSDP and print all found tables */
530 memcpy(&rsdpx, x, sizeof(struct acpi_rsdp_descriptor));
531 acpi_unmap_memory(raw, length);
533 lseek(fd, sizeof(struct acpi_rsdp_descriptor), SEEK_SET);
535 if (!acpi_dump_SDT(fd, &rsdpx))
538 lseek(fd, 0, SEEK_SET);
539 write(fd, x, (rsdpx.revision < 2) ?
540 ACPI_RSDP_CHECKSUM_LENGTH : ACPI_RSDP_XCHECKSUM_LENGTH);
541 } else if (!select_sig[0] || !memcmp("RSD PTR ", select_sig, 4)) {
542 addr += (long)x - (long)raw;
543 length = snprintf(buff, 80, "RSD PTR @ %p\n", (void *)addr);
544 write(fd, buff, length);
545 acpi_show_data(fd, (u8 *) & rsdpx, (rsdpx.revision < 2) ?
546 ACPI_RSDP_CHECKSUM_LENGTH : ACPI_RSDP_XCHECKSUM_LENGTH);
550 acpi_dump_dynamic_SSDT(fd);
555 fprintf(stderr, "ACPI tables were not found. If you know location "
556 "of RSD PTR table (from dmesg, etc), "
557 "supply it with either --addr or -a option\n");