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Merge branch 'acpidump' into acpica

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Len Brown 2012-09-22 23:34:35 -04:00
commit 8fa6b970ff
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18
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PROG= acpidump
SRCS= acpidump.c
KERNEL_INCLUDE := ../../../include
CFLAGS += -Wall -Wstrict-prototypes -Wdeclaration-after-statement -Os -s -D_LINUX -DDEFINE_ALTERNATE_TYPES -I$(KERNEL_INCLUDE)
all: acpidump
$(PROG) : $(SRCS)
$(CC) $(CFLAGS) $(SRCS) -o $(PROG)
CLEANFILES= $(PROG)
clean :
rm -f $(CLEANFILES) $(patsubst %.c,%.o, $(SRCS)) *~
install :
install acpidump /usr/bin/acpidump
install acpidump.8 /usr/share/man/man8

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tools/power/acpi/acpidump.8 Normal file
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.TH ACPIDUMP 8
.SH NAME
acpidump \- Dump system's ACPI tables to an ASCII file.
.SH SYNOPSIS
.ft B
.B acpidump > acpidump.out
.SH DESCRIPTION
\fBacpidump \fP dumps the systems ACPI tables to an ASCII file
appropriate for attaching to a bug report.
Subsequently, they can be processed by utilities in the ACPICA package.
.SS Options
no options worth worrying about.
.PP
.SH EXAMPLE
.nf
# acpidump > acpidump.out
$ acpixtract -a acpidump.out
Acpi table [DSDT] - 15974 bytes written to DSDT.dat
Acpi table [FACS] - 64 bytes written to FACS.dat
Acpi table [FACP] - 116 bytes written to FACP.dat
Acpi table [APIC] - 120 bytes written to APIC.dat
Acpi table [MCFG] - 60 bytes written to MCFG.dat
Acpi table [SSDT] - 444 bytes written to SSDT1.dat
Acpi table [SSDT] - 439 bytes written to SSDT2.dat
Acpi table [SSDT] - 439 bytes written to SSDT3.dat
Acpi table [SSDT] - 439 bytes written to SSDT4.dat
Acpi table [SSDT] - 439 bytes written to SSDT5.dat
Acpi table [RSDT] - 76 bytes written to RSDT.dat
Acpi table [RSDP] - 20 bytes written to RSDP.dat
$ iasl -d *.dat
...
.fi
creates *.dsl, a human readable form which can be edited
and compiled using iasl.
.SH NOTES
.B "acpidump "
must be run as root.
.SH REFERENCES
ACPICA: https://acpica.org/
.SH FILES
.ta
.nf
/dev/mem
/sys/firmware/acpi/tables/dynamic/*
.fi
.PP
.SH AUTHOR
.nf
Written by Len Brown <len.brown@intel.com>

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tools/power/acpi/acpidump.c Normal file
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/*
* (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 <sys/types.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;
}