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
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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>
66 #include <acpi/acconfig.h>
67 #include <acpi/platform/acenv.h>
68 #include <acpi/actypes.h>
69 #include <acpi/actbl.h>
71 static inline u8 checksum(u8 * buffer, u32 length)
73 u8 sum = 0, *i = buffer;
75 for (; i < buffer; sum += *(i++));
79 static unsigned long psz, addr, length;
80 static int print, connect, skip;
81 static u8 select_sig[4];
83 static unsigned long read_efi_systab( void )
87 FILE *f = fopen("/sys/firmware/efi/systab", "r");
89 while (fgets(buffer, 80, f)) {
90 if (sscanf(buffer, "ACPI20=0x%lx", &addr) == 1)
98 static u8 *acpi_map_memory(unsigned long where, unsigned length)
100 unsigned long offset;
102 int fd = open("/dev/mem", O_RDONLY);
104 fprintf(stderr, "acpi_os_map_memory: cannot open /dev/mem\n");
107 offset = where % psz;
108 there = mmap(NULL, length + offset, PROT_READ, MAP_PRIVATE,
111 if (there == MAP_FAILED) return 0;
112 return (there + offset);
115 static void acpi_unmap_memory(u8 * there, unsigned length)
117 unsigned long offset = (unsigned long)there % psz;
118 munmap(there - offset, length + offset);
121 static struct acpi_table_header *acpi_map_table(unsigned long where, char *sig)
124 struct acpi_table_header *tbl = (struct acpi_table_header *)
125 acpi_map_memory(where, sizeof(struct acpi_table_header));
126 if (!tbl || (sig && memcmp(sig, tbl->signature, 4))) return 0;
128 acpi_unmap_memory((u8 *) tbl, sizeof(struct acpi_table_header));
129 return (struct acpi_table_header *)acpi_map_memory(where, size);
132 static void acpi_unmap_table(struct acpi_table_header *tbl)
134 acpi_unmap_memory((u8 *)tbl, tbl->length);
137 static struct acpi_rsdp_descriptor *acpi_scan_for_rsdp(u8 *begin, u32 length)
139 struct acpi_rsdp_descriptor *rsdp;
140 u8 *i, *end = begin + length;
141 /* Search from given start address for the requested length */
142 for (i = begin; i < end; i += ACPI_RSDP_SCAN_STEP) {
143 /* The signature and checksum must both be correct */
144 if (memcmp((char *)i, "RSD PTR ", 8)) continue;
145 rsdp = (struct acpi_rsdp_descriptor *)i;
146 /* Signature matches, check the appropriate checksum */
147 if (!checksum((u8 *) rsdp, (rsdp->revision < 2) ?
148 ACPI_RSDP_CHECKSUM_LENGTH :
149 ACPI_RSDP_XCHECKSUM_LENGTH))
150 /* Checksum valid, we have found a valid RSDP */
153 /* Searched entire block, no RSDP was found */
160 static void acpi_show_data(int fd, u8 * data, int size)
164 int i, remain = size;
166 len = snprintf(buffer, 256, " %04x:", size - remain);
167 for (i = 0; i < 16 && i < remain; i++) {
169 snprintf(&buffer[len], 256 - len, " %02x", data[i]);
171 for (; i < 16; i++) {
172 len += snprintf(&buffer[len], 256 - len, " ");
174 len += snprintf(&buffer[len], 256 - len, " ");
175 for (i = 0; i < 16 && i < remain; i++) {
176 buffer[len++] = (isprint(data[i])) ? data[i] : '.';
178 buffer[len++] = '\n';
179 write(fd, buffer, len);
188 static void acpi_show_table(int fd, struct acpi_table_header *table, unsigned long addr)
191 int len = snprintf(buff, 80, "%.4s @ %p\n", table->signature, (void *)addr);
192 write(fd, buff, len);
193 acpi_show_data(fd, (u8 *) table, table->length);
198 static void write_table(int fd, struct acpi_table_header *tbl, unsigned long addr)
200 static int select_done = 0;
201 if (!select_sig[0]) {
203 acpi_show_table(fd, tbl, addr);
205 write(fd, tbl, tbl->length);
207 } else if (!select_done && !memcmp(select_sig, tbl->signature, 4)) {
213 acpi_show_table(fd, tbl, addr);
215 write(fd, tbl, tbl->length);
221 static void acpi_dump_FADT(int fd, struct acpi_table_header *tbl, unsigned long xaddr) {
222 struct acpi_fadt_descriptor x;
224 size_t len = sizeof(struct acpi_fadt_descriptor);
225 if (len > tbl->length) len = tbl->length;
226 memcpy(&x, tbl, len);
227 x.header.length = len;
228 if (checksum((u8 *)tbl, len)) {
229 fprintf(stderr, "Wrong checksum for FADT!\n");
231 if (x.header.length >= 148 && x.Xdsdt) {
232 addr = (unsigned long)x.Xdsdt;
234 x.Xdsdt = lseek(fd, 0, SEEK_CUR);
236 } else if (x.header.length >= 44 && x.dsdt) {
237 addr = (unsigned long)x.dsdt;
239 x.dsdt = lseek(fd, 0, SEEK_CUR);
242 fprintf(stderr, "No DSDT in FADT!\n");
245 tbl = acpi_map_table(addr, DSDT_SIG);
246 if (!tbl) goto no_dsdt;
247 if (checksum((u8 *)tbl, tbl->length))
248 fprintf(stderr, "Wrong checksum for DSDT!\n");
249 write_table(fd, tbl, addr);
250 acpi_unmap_table(tbl);
252 if (x.header.length >= 140 && x.xfirmware_ctrl) {
253 addr = (unsigned long)x.xfirmware_ctrl;
255 x.xfirmware_ctrl = lseek(fd, 0, SEEK_CUR);
257 } else if (x.header.length >= 40 && x.firmware_ctrl) {
258 addr = (unsigned long)x.firmware_ctrl;
260 x.firmware_ctrl = lseek(fd, 0, SEEK_CUR);
263 fprintf(stderr, "No FACS in FADT!\n");
266 tbl = acpi_map_table(addr, FACS_SIG);
267 if (!tbl) goto no_facs;
268 /* do not checksum FACS */
269 write_table(fd, tbl, addr);
270 acpi_unmap_table(tbl);
272 write_table(fd, (struct acpi_table_header *)&x, xaddr);
275 static int acpi_dump_SDT(int fd, struct acpi_rsdp_descriptor *rsdp)
277 struct acpi_table_header *sdt, *tbl = 0;
278 int xsdt = 1, i, num;
281 if (rsdp->revision > 1 && rsdp->xsdt_physical_address) {
282 tbl = acpi_map_table(rsdp->xsdt_physical_address, "XSDT");
284 if (!tbl && rsdp->rsdt_physical_address) {
286 tbl = acpi_map_table(rsdp->rsdt_physical_address, "RSDT");
289 sdt = malloc(tbl->length);
290 memcpy(sdt, tbl, tbl->length);
291 acpi_unmap_table(tbl);
292 if (checksum((u8 *)sdt, sdt->length))
293 fprintf(stderr, "Wrong checksum for %s!\n", (xsdt)?"XSDT":"RSDT");
294 num = (sdt->length - sizeof(struct acpi_table_header))/((xsdt)?sizeof(u64):sizeof(u32));
295 offset = (char *)sdt + sizeof(struct acpi_table_header);
296 for (i = 0; i < num; ++i, offset += ((xsdt) ? sizeof(u64) : sizeof(u32))) {
297 addr = (xsdt) ? (unsigned long)(*(u64 *)offset):
298 (unsigned long)(*(u32 *)offset);
300 tbl = acpi_map_table(addr, 0);
302 if (!memcmp(tbl->signature, FADT_SIG, 4)) {
303 acpi_dump_FADT(fd, tbl, addr);
305 if (checksum((u8 *)tbl, tbl->length))
306 fprintf(stderr, "Wrong checksum for generic table!\n");
307 write_table(fd, tbl, addr);
309 acpi_unmap_table(tbl);
312 (*(u64*)offset) = lseek(fd, 0, SEEK_CUR);
314 (*(u32*)offset) = lseek(fd, 0, SEEK_CUR);
318 addr = (unsigned long)rsdp->xsdt_physical_address;
320 rsdp->xsdt_physical_address = lseek(fd, 0, SEEK_CUR);
323 addr = (unsigned long)rsdp->rsdt_physical_address;
325 rsdp->rsdt_physical_address = lseek(fd, 0, SEEK_CUR);
328 write_table(fd, sdt, addr);
333 static void usage(const char *progname)
336 printf("%s [--addr 0x1234][--table DSDT][--output filename]"
337 "[--binary][--length 0x456][--help]\n", progname);
338 puts("\t--addr 0x1234 or -a 0x1234 -- look for tables at this physical address");
339 puts("\t--table DSDT or -t DSDT -- only dump table with DSDT signature");
340 puts("\t--output filename or -o filename -- redirect output from stdin to filename");
341 puts("\t--binary or -b -- dump data in binary form rather than in hex-dump format");
342 puts("\t--length 0x456 or -l 0x456 -- works only with --addr, dump physical memory"
343 "\n\t\tregion without trying to understand it's contents");
344 puts("\t--skip 2 or -s 2 -- skip 2 tables of the given name and output only 3rd one");
345 puts("\t--help or -h -- this help message");
349 static struct option long_options[] = {
359 int main(int argc, char **argv)
361 int option_index, c, fd;
363 struct acpi_rsdp_descriptor rsdpx, *x = 0;
366 memset(select_sig, 0, 4);
373 c = getopt_long(argc, argv, "a:t:o:bl:s:h",
374 long_options, &option_index);
380 switch (option_index) {
382 addr = strtoul(optarg, (char **)NULL, 16);
385 memcpy(select_sig, optarg, 4);
394 length = strtoul(optarg, (char **)NULL, 16);
397 skip = strtoul(optarg, (char **)NULL, 10);
405 addr = strtoul(optarg, (char **)NULL, 16);
408 memcpy(select_sig, optarg, 4);
417 length = strtoul(optarg, (char **)NULL, 16);
420 skip = strtoul(optarg, (char **)NULL, 10);
426 printf("Unknown option!\n");
434 fd = creat(filename, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
439 if (!select_sig[0] && !print) {
443 psz = sysconf(_SC_PAGESIZE);
444 if (length && addr) {
445 /* We know length and address, it means we just want a memory dump */
446 if (!(raw = acpi_map_memory(addr, length)))
448 write(fd, raw, length);
449 acpi_unmap_memory(raw, length);
453 length = sizeof(struct acpi_rsdp_descriptor);
455 addr = read_efi_systab();
457 addr = ACPI_HI_RSDP_WINDOW_BASE;
458 length = ACPI_HI_RSDP_WINDOW_SIZE;
462 if (!(raw = acpi_map_memory(addr, length)) ||
463 !(x = acpi_scan_for_rsdp(raw, length)))
466 /* Find RSDP and print all found tables */
467 memcpy(&rsdpx, x, sizeof(struct acpi_rsdp_descriptor));
468 acpi_unmap_memory(raw, length);
470 lseek(fd, sizeof(struct acpi_rsdp_descriptor), SEEK_SET);
472 if (!acpi_dump_SDT(fd, &rsdpx))
475 lseek(fd, 0, SEEK_SET);
476 write(fd, x, (rsdpx.revision < 2) ?
477 ACPI_RSDP_CHECKSUM_LENGTH : ACPI_RSDP_XCHECKSUM_LENGTH);
478 } else if (!select_sig[0] || !memcmp("RSD PTR ", select_sig, 4)) {
479 addr += (long)x - (long)raw;
480 length = snprintf(buff, 80, "RSD PTR @ %p\n", (void *)addr);
481 write(fd, buff, length);
482 acpi_show_data(fd, (u8 *) & rsdpx, (rsdpx.revision < 2) ?
483 ACPI_RSDP_CHECKSUM_LENGTH : ACPI_RSDP_XCHECKSUM_LENGTH);
489 fprintf(stderr, "ACPI tables were not found. If you know location "
490 "of RSD PTR table (from dmesg, etc), "
491 "supply it with either --addr or -a option\n");