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tools/power/acpi/acpidump: version 20101221 - find dynamic tables in …
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…sysfs

This is unchanged version 20101221, plus a small bit in
DEFINE_ALTERNATE_TYPES to enable building with latest kernel headers.

This version finds dynamic tables exported by Linux in
/sys/firmware/acpi/tables/dynamic

Signed-off-by: Yakui Zhao <yakui.zhao@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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Yakui Zhao authored and Len Brown committed Sep 25, 2012
1 parent 39a55ff commit b7e1751
Showing 1 changed file with 89 additions and 98 deletions.
187 changes: 89 additions & 98 deletions tools/power/acpi/acpidump.c
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Original file line number Diff line number Diff line change
@@ -1,6 +1,5 @@
/*
* (c) Alexey Starikovskiy, Intel, 2005-2006.
* (c) Len Brown, Intel, 2007.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
Expand Down Expand Up @@ -63,6 +62,8 @@ typedef long long s64;
#include <unistd.h>
#include <getopt.h>

#include <sys/types.h>
#include <dirent.h>

#include <acpi/acconfig.h>
#include <acpi/platform/acenv.h>
Expand Down Expand Up @@ -186,40 +187,6 @@ static void acpi_show_data(int fd, u8 * data, int size)
/*
* Output ACPI table
*/

#define MAX_TABLES 128
int next_table_dump;
u64 dumped_tables[MAX_TABLES];

void
set_table_dumped(u64 address) {
if (next_table_dump >= MAX_TABLES) {
printf("increase MAX_TABLES\n");
exit(1);
}
dumped_tables[next_table_dump++] = address;
}

/*
* list the tables as they are dumped
* check the list so that they are not dumped twice.
*
* this is needed because we follow both the XSDT and RSDT
* which generally point to all duplicate tables
* except the FADT
*/
int
check_table_dumped(u64 address) {
int i;

for (i = 0; i < MAX_TABLES; ++i) {
if (address == dumped_tables[i])
return 1;
if (dumped_tables[i] == 0)
return 0;
}
return 0;
}
static void acpi_show_table(int fd, struct acpi_table_header *table, unsigned long addr)
{
char buff[80];
Expand All @@ -233,10 +200,6 @@ static void acpi_show_table(int fd, struct acpi_table_header *table, unsigned lo
static void write_table(int fd, struct acpi_table_header *tbl, unsigned long addr)
{
static int select_done = 0;

if (check_table_dumped((u64)addr))
return;

if (!select_sig[0]) {
if (print) {
acpi_show_table(fd, tbl, addr);
Expand All @@ -255,7 +218,6 @@ static void write_table(int fd, struct acpi_table_header *tbl, unsigned long add
}
select_done = 1;
}
set_table_dumped((u64) addr);
}

static void acpi_dump_FADT(int fd, struct acpi_table_header *tbl, unsigned long xaddr) {
Expand Down Expand Up @@ -312,93 +274,123 @@ static void acpi_dump_FADT(int fd, struct acpi_table_header *tbl, unsigned long
write_table(fd, (struct acpi_table_header *)&x, xaddr);
}


static int acpi_dump_RSDT(int fd, struct acpi_rsdp_descriptor *rsdp)
static int acpi_dump_SDT(int fd, struct acpi_rsdp_descriptor *rsdp)
{
struct acpi_table_header *sdt, *tbl = 0;
int i, num;
int xsdt = 1, i, num;
char *offset;
unsigned long addr;

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

static void usage(const char *progname)
Expand Down Expand Up @@ -518,6 +510,7 @@ int main(int argc, char **argv)
goto not_found;
write(fd, raw, length);
acpi_unmap_memory(raw, length);
close(fd);
return 0;
}

Expand All @@ -540,12 +533,7 @@ int main(int argc, char **argv)
if (connect) {
lseek(fd, sizeof(struct acpi_rsdp_descriptor), SEEK_SET);
}
if (rsdpx.revision > 1 && rsdpx.xsdt_physical_address) {
/* ACPIDUMP uses xsdt table */
if (!acpi_dump_XSDT(fd, &rsdpx))
goto not_found;
}
if (!acpi_dump_RSDT(fd, &rsdpx))
if (!acpi_dump_SDT(fd, &rsdpx))
goto not_found;
if (connect) {
lseek(fd, 0, SEEK_SET);
Expand All @@ -560,8 +548,11 @@ int main(int argc, char **argv)
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");
Expand Down

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