560 lines
15 KiB
C
560 lines
15 KiB
C
/*
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* (c) Alexey Starikovskiy, Intel, 2005-2006.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#ifdef DEFINE_ALTERNATE_TYPES
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/* hack to enable building old application with new headers -lenb */
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#define acpi_fadt_descriptor acpi_table_fadt
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#define acpi_rsdp_descriptor acpi_table_rsdp
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#define DSDT_SIG ACPI_SIG_DSDT
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#define FACS_SIG ACPI_SIG_FACS
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#define FADT_SIG ACPI_SIG_FADT
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#define xfirmware_ctrl Xfacs
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#define firmware_ctrl facs
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typedef int s32;
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typedef unsigned char u8;
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typedef unsigned short u16;
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typedef unsigned int u32;
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typedef unsigned long long u64;
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typedef long long s64;
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#endif
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <getopt.h>
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#include <dirent.h>
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#include <acpi/acconfig.h>
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#include <acpi/platform/acenv.h>
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#include <acpi/actypes.h>
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#include <acpi/actbl.h>
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static inline u8 checksum(u8 * buffer, u32 length)
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{
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u8 sum = 0, *i = buffer;
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buffer += length;
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for (; i < buffer; sum += *(i++));
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return sum;
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}
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static unsigned long psz, addr, length;
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static int print, connect, skip;
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static u8 select_sig[4];
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static unsigned long read_efi_systab( void )
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{
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char buffer[80];
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unsigned long addr;
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FILE *f = fopen("/sys/firmware/efi/systab", "r");
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if (f) {
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while (fgets(buffer, 80, f)) {
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if (sscanf(buffer, "ACPI20=0x%lx", &addr) == 1)
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return addr;
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}
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fclose(f);
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}
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return 0;
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}
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static u8 *acpi_map_memory(unsigned long where, unsigned length)
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{
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unsigned long offset;
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u8 *there;
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int fd = open("/dev/mem", O_RDONLY);
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if (fd < 0) {
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fprintf(stderr, "acpi_os_map_memory: cannot open /dev/mem\n");
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exit(1);
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}
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offset = where % psz;
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there = mmap(NULL, length + offset, PROT_READ, MAP_PRIVATE,
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fd, where - offset);
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close(fd);
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if (there == MAP_FAILED) return 0;
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return (there + offset);
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}
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static void acpi_unmap_memory(u8 * there, unsigned length)
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{
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unsigned long offset = (unsigned long)there % psz;
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munmap(there - offset, length + offset);
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}
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static struct acpi_table_header *acpi_map_table(unsigned long where, char *sig)
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{
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unsigned size;
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struct acpi_table_header *tbl = (struct acpi_table_header *)
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acpi_map_memory(where, sizeof(struct acpi_table_header));
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if (!tbl || (sig && memcmp(sig, tbl->signature, 4))) return 0;
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size = tbl->length;
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acpi_unmap_memory((u8 *) tbl, sizeof(struct acpi_table_header));
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return (struct acpi_table_header *)acpi_map_memory(where, size);
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}
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static void acpi_unmap_table(struct acpi_table_header *tbl)
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{
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acpi_unmap_memory((u8 *)tbl, tbl->length);
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}
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static struct acpi_rsdp_descriptor *acpi_scan_for_rsdp(u8 *begin, u32 length)
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{
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struct acpi_rsdp_descriptor *rsdp;
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u8 *i, *end = begin + length;
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/* Search from given start address for the requested length */
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for (i = begin; i < end; i += ACPI_RSDP_SCAN_STEP) {
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/* The signature and checksum must both be correct */
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if (memcmp((char *)i, "RSD PTR ", 8)) continue;
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rsdp = (struct acpi_rsdp_descriptor *)i;
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/* Signature matches, check the appropriate checksum */
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if (!checksum((u8 *) rsdp, (rsdp->revision < 2) ?
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ACPI_RSDP_CHECKSUM_LENGTH :
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ACPI_RSDP_XCHECKSUM_LENGTH))
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/* Checksum valid, we have found a valid RSDP */
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return rsdp;
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}
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/* Searched entire block, no RSDP was found */
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return 0;
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}
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/*
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* Output data
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*/
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static void acpi_show_data(int fd, u8 * data, int size)
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{
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char buffer[256];
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int len;
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int i, remain = size;
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while (remain > 0) {
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len = snprintf(buffer, 256, " %04x:", size - remain);
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for (i = 0; i < 16 && i < remain; i++) {
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len +=
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snprintf(&buffer[len], 256 - len, " %02x", data[i]);
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}
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for (; i < 16; i++) {
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len += snprintf(&buffer[len], 256 - len, " ");
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}
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len += snprintf(&buffer[len], 256 - len, " ");
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for (i = 0; i < 16 && i < remain; i++) {
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buffer[len++] = (isprint(data[i])) ? data[i] : '.';
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}
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buffer[len++] = '\n';
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write(fd, buffer, len);
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data += 16;
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remain -= 16;
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}
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}
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/*
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* Output ACPI table
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*/
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static void acpi_show_table(int fd, struct acpi_table_header *table, unsigned long addr)
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{
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char buff[80];
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int len = snprintf(buff, 80, "%.4s @ %p\n", table->signature, (void *)addr);
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write(fd, buff, len);
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acpi_show_data(fd, (u8 *) table, table->length);
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buff[0] = '\n';
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write(fd, buff, 1);
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}
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static void write_table(int fd, struct acpi_table_header *tbl, unsigned long addr)
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{
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static int select_done = 0;
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if (!select_sig[0]) {
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if (print) {
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acpi_show_table(fd, tbl, addr);
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} else {
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write(fd, tbl, tbl->length);
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}
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} else if (!select_done && !memcmp(select_sig, tbl->signature, 4)) {
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if (skip > 0) {
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--skip;
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return;
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}
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if (print) {
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acpi_show_table(fd, tbl, addr);
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} else {
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write(fd, tbl, tbl->length);
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}
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select_done = 1;
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}
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}
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static void acpi_dump_FADT(int fd, struct acpi_table_header *tbl, unsigned long xaddr) {
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struct acpi_fadt_descriptor x;
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unsigned long addr;
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size_t len = sizeof(struct acpi_fadt_descriptor);
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if (len > tbl->length) len = tbl->length;
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memcpy(&x, tbl, len);
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x.header.length = len;
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if (checksum((u8 *)tbl, len)) {
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fprintf(stderr, "Wrong checksum for FADT!\n");
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}
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if (x.header.length >= 148 && x.Xdsdt) {
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addr = (unsigned long)x.Xdsdt;
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if (connect) {
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x.Xdsdt = lseek(fd, 0, SEEK_CUR);
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}
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} else if (x.header.length >= 44 && x.dsdt) {
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addr = (unsigned long)x.dsdt;
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if (connect) {
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x.dsdt = lseek(fd, 0, SEEK_CUR);
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}
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} else {
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fprintf(stderr, "No DSDT in FADT!\n");
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goto no_dsdt;
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}
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tbl = acpi_map_table(addr, DSDT_SIG);
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if (!tbl) goto no_dsdt;
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if (checksum((u8 *)tbl, tbl->length))
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fprintf(stderr, "Wrong checksum for DSDT!\n");
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write_table(fd, tbl, addr);
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acpi_unmap_table(tbl);
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no_dsdt:
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if (x.header.length >= 140 && x.xfirmware_ctrl) {
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addr = (unsigned long)x.xfirmware_ctrl;
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if (connect) {
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x.xfirmware_ctrl = lseek(fd, 0, SEEK_CUR);
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}
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} else if (x.header.length >= 40 && x.firmware_ctrl) {
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addr = (unsigned long)x.firmware_ctrl;
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if (connect) {
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x.firmware_ctrl = lseek(fd, 0, SEEK_CUR);
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}
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} else {
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fprintf(stderr, "No FACS in FADT!\n");
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goto no_facs;
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}
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tbl = acpi_map_table(addr, FACS_SIG);
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if (!tbl) goto no_facs;
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/* do not checksum FACS */
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write_table(fd, tbl, addr);
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acpi_unmap_table(tbl);
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no_facs:
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write_table(fd, (struct acpi_table_header *)&x, xaddr);
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}
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static int acpi_dump_SDT(int fd, struct acpi_rsdp_descriptor *rsdp)
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{
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struct acpi_table_header *sdt, *tbl = 0;
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int xsdt = 1, i, num;
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char *offset;
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unsigned long addr;
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if (rsdp->revision > 1 && rsdp->xsdt_physical_address) {
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tbl = acpi_map_table(rsdp->xsdt_physical_address, "XSDT");
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}
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if (!tbl && rsdp->rsdt_physical_address) {
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xsdt = 0;
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tbl = acpi_map_table(rsdp->rsdt_physical_address, "RSDT");
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}
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if (!tbl) return 0;
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sdt = malloc(tbl->length);
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memcpy(sdt, tbl, tbl->length);
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acpi_unmap_table(tbl);
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if (checksum((u8 *)sdt, sdt->length))
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fprintf(stderr, "Wrong checksum for %s!\n", (xsdt)?"XSDT":"RSDT");
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num = (sdt->length - sizeof(struct acpi_table_header))/((xsdt)?sizeof(u64):sizeof(u32));
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offset = (char *)sdt + sizeof(struct acpi_table_header);
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for (i = 0; i < num; ++i, offset += ((xsdt) ? sizeof(u64) : sizeof(u32))) {
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addr = (xsdt) ? (unsigned long)(*(u64 *)offset):
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(unsigned long)(*(u32 *)offset);
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if (!addr) continue;
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tbl = acpi_map_table(addr, 0);
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if (!tbl) continue;
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if (!memcmp(tbl->signature, FADT_SIG, 4)) {
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acpi_dump_FADT(fd, tbl, addr);
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} else {
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if (checksum((u8 *)tbl, tbl->length))
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fprintf(stderr, "Wrong checksum for generic table!\n");
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write_table(fd, tbl, addr);
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}
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acpi_unmap_table(tbl);
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if (connect) {
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if (xsdt)
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(*(u64*)offset) = lseek(fd, 0, SEEK_CUR);
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else
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(*(u32*)offset) = lseek(fd, 0, SEEK_CUR);
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}
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}
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if (xsdt) {
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addr = (unsigned long)rsdp->xsdt_physical_address;
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if (connect) {
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rsdp->xsdt_physical_address = lseek(fd, 0, SEEK_CUR);
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}
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} else {
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addr = (unsigned long)rsdp->rsdt_physical_address;
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if (connect) {
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rsdp->rsdt_physical_address = lseek(fd, 0, SEEK_CUR);
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}
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}
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write_table(fd, sdt, addr);
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free (sdt);
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return 1;
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}
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#define DYNAMIC_SSDT "/sys/firmware/acpi/tables/dynamic"
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static void acpi_dump_dynamic_SSDT(int fd)
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{
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struct stat file_stat;
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char filename[256], *ptr;
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DIR *tabledir;
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struct dirent *entry;
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FILE *fp;
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int count, readcount, length;
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struct acpi_table_header table_header, *ptable;
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if (stat(DYNAMIC_SSDT, &file_stat) == -1) {
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/* The directory doesn't exist */
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return;
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}
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tabledir = opendir(DYNAMIC_SSDT);
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if(!tabledir){
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/*can't open the directory */
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return;
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}
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while ((entry = readdir(tabledir)) != 0){
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/* skip the file of . /.. */
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if (entry->d_name[0] == '.')
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continue;
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sprintf(filename, "%s/%s", DYNAMIC_SSDT, entry->d_name);
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fp = fopen(filename, "r");
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if (fp == NULL) {
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fprintf(stderr, "Can't open the file of %s\n",
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filename);
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continue;
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}
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/* Read the Table header to parse the table length */
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count = fread(&table_header, 1, sizeof(struct acpi_table_header), fp);
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if (count < sizeof(table_header)) {
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/* the length is lessn than ACPI table header. skip it */
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fclose(fp);
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continue;
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}
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length = table_header.length;
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ptr = malloc(table_header.length);
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fseek(fp, 0, SEEK_SET);
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readcount = 0;
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while(!feof(fp) && readcount < length) {
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count = fread(ptr + readcount, 1, 256, fp);
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readcount += count;
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}
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fclose(fp);
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ptable = (struct acpi_table_header *) ptr;
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if (checksum((u8 *) ptable, ptable->length))
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fprintf(stderr, "Wrong checksum "
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"for dynamic SSDT table!\n");
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write_table(fd, ptable, 0);
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free(ptr);
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}
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closedir(tabledir);
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return;
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}
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static void usage(const char *progname)
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{
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puts("Usage:");
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printf("%s [--addr 0x1234][--table DSDT][--output filename]"
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"[--binary][--length 0x456][--help]\n", progname);
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puts("\t--addr 0x1234 or -a 0x1234 -- look for tables at this physical address");
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puts("\t--table DSDT or -t DSDT -- only dump table with DSDT signature");
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puts("\t--output filename or -o filename -- redirect output from stdin to filename");
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puts("\t--binary or -b -- dump data in binary form rather than in hex-dump format");
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puts("\t--length 0x456 or -l 0x456 -- works only with --addr, dump physical memory"
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"\n\t\tregion without trying to understand it's contents");
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puts("\t--skip 2 or -s 2 -- skip 2 tables of the given name and output only 3rd one");
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puts("\t--help or -h -- this help message");
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exit(0);
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}
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static struct option long_options[] = {
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{"addr", 1, 0, 0},
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{"table", 1, 0, 0},
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{"output", 1, 0, 0},
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{"binary", 0, 0, 0},
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{"length", 1, 0, 0},
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{"skip", 1, 0, 0},
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{"help", 0, 0, 0},
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{0, 0, 0, 0}
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};
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int main(int argc, char **argv)
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{
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int option_index, c, fd;
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u8 *raw;
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struct acpi_rsdp_descriptor rsdpx, *x = 0;
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char *filename = 0;
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char buff[80];
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memset(select_sig, 0, 4);
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print = 1;
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connect = 0;
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addr = length = 0;
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skip = 0;
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while (1) {
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option_index = 0;
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c = getopt_long(argc, argv, "a:t:o:bl:s:h",
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long_options, &option_index);
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if (c == -1)
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break;
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switch (c) {
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case 0:
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switch (option_index) {
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case 0:
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addr = strtoul(optarg, (char **)NULL, 16);
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break;
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case 1:
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memcpy(select_sig, optarg, 4);
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break;
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case 2:
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filename = optarg;
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break;
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case 3:
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print = 0;
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break;
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case 4:
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length = strtoul(optarg, (char **)NULL, 16);
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break;
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case 5:
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skip = strtoul(optarg, (char **)NULL, 10);
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break;
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case 6:
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usage(argv[0]);
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exit(0);
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}
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break;
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case 'a':
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addr = strtoul(optarg, (char **)NULL, 16);
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break;
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case 't':
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memcpy(select_sig, optarg, 4);
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break;
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case 'o':
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filename = optarg;
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break;
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case 'b':
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print = 0;
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break;
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case 'l':
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length = strtoul(optarg, (char **)NULL, 16);
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break;
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case 's':
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skip = strtoul(optarg, (char **)NULL, 10);
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break;
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case 'h':
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usage(argv[0]);
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exit(0);
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default:
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printf("Unknown option!\n");
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usage(argv[0]);
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exit(0);
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}
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}
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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;
|
|
}
|