--- /dev/null
+/*
+ * (c) Alexey Starikovskiy, Intel, 2005.
+ * 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 <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;
+static u8 select_sig[4];
+
+static unsigned long read_efi_systab( void )
+{
+ FILE *f = fopen("/sys/firmware/efi/systab", "r");
+ if (f) {
+ char buffer[80];
+ while (fgets(buffer, 80, f)) {
+ unsigned long addr;
+ if (sscanf(buffer, "ACPI20=0x%lx", &addr) == 1)
+ return addr;
+ }
+ fclose(f);
+ }
+ return 0;
+}
+
+static u8 *acpi_map_memory(unsigned long where, unsigned length)
+{
+ int fd = open("/dev/mem", O_RDONLY);
+ if (fd < 0) {
+ fprintf(stderr, "acpi_os_map_memory: cannot open /dev/mem\n");
+ exit(1);
+ }
+ unsigned long offset = where % psz;
+ u8 *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)
+{
+ 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;
+ unsigned 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)
+{
+ 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;
+ struct acpi_rsdp_descriptor *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 i, remain = size;
+ while (remain > 0) {
+ int 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 (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 *tbl = 0;
+ int xsdt = 1;
+ 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;
+ struct acpi_table_header *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");
+ int i, num = (sdt->length - sizeof(struct acpi_table_header))/((xsdt)?sizeof(u64):sizeof(u32));
+ char *offset = (char *)sdt + sizeof(struct acpi_table_header);
+ unsigned long addr;
+ for (i = 0; i < num; ++i, offset += ((xsdt) ? sizeof(u64) : sizeof(u32))) {
+ addr = (xsdt) ? (unsigned long)(*(u64 *)offset):
+ (unsigned long)(*(u32 *)offset);
+ 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;
+}
+
+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--help or -h -- this help message");
+ exit(0);
+}
+
+int main(int argc, char **argv)
+{
+ memset(select_sig, 0, 4);
+ print = 1;
+ connect = 0;
+ char *filename = 0;
+ addr = length = 0;
+ while (1) {
+ int option_index = 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},
+ {"help", 0, 0, 0},
+ {0, 0, 0, 0}
+ };
+ int c = getopt_long(argc, argv, "a:t:o:bl: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:
+ 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 'h':
+ usage(argv[0]);
+ exit(0);
+ default:
+ printf("Unknown option!\n");
+ usage(argv[0]);
+ exit(0);
+ }
+ }
+
+ int 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);
+ u8 *raw;
+ 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);
+ 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;
+ }
+ }
+
+ struct acpi_rsdp_descriptor rsdpx, *x = 0;
+ 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)) {
+ char buff[80];
+ 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);
+ }
+ return 0;
+not_found:
+ 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;
+}
projects / linux-drm-fsl-dcu.git / commitdiff