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+/*
+ * BIOS Decode
+ *
+ * Copyright (C) 2000-2002 Alan Cox <alan@redhat.com>
+ * Copyright (C) 2002-2017 Jean Delvare <jdelvare@suse.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * For the avoidance of doubt the "preferred form" of this code is one which
+ * is in an open unpatent encumbered format. Where cryptographic key signing
+ * forms part of the process of creating an executable the information
+ * including keys needed to generate an equivalently functional executable
+ * are deemed to be part of the source code.
+ *
+ * References:
+ * - DMTF "System Management BIOS (SMBIOS) Reference Specification"
+ * Version 3.0.0
+ * http://www.dmtf.org/standards/smbios
+ * - Intel "Preboot Execution Environment (PXE) Specification"
+ * Version 2.1
+ * http://www.intel.com/labs/manage/wfm/wfmspecs.htm
+ * - ACPI "Advanced Configuration and Power Interface Specification"
+ * Revision 2.0
+ * http://www.acpi.info/spec20.htm
+ * - Phoenix "BIOS32 Service Directory"
+ * Revision 0.4
+ * http://www.phoenix.com/en/support/white+papers-specs/
+ * - Microsoft "Plug and Play BIOS Specification"
+ * Version 1.0A
+ * http://www.microsoft.com/hwdev/tech/PnP/
+ * - Microsoft "PCI IRQ Routing Table Specification"
+ * Version 1.0
+ * http://www.microsoft.com/hwdev/archive/BUSBIOS/pciirq.asp
+ * - Compaq "Technical Reference Guide for Compaq Deskpro 4000 and 6000"
+ * First Edition
+ * http://h18000.www1.hp.com/support/techpubs/technical_reference_guides/113a1097.html
+ * - IBM "Using the BIOS Build ID to identify Thinkpad systems"
+ * Revision 2005-09-19
+ * http://www-307.ibm.com/pc/support/site.wss/MIGR-45120.html
+ * - Fujitsu application panel technical details
+ * As of July 23rd, 2004
+ * http://apanel.sourceforge.net/tech.php
+ * - Intel Multiprocessor Specification
+ * Version 1.4
+ * http://www.intel.com/design/archives/processors/pro/docs/242016.htm
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <getopt.h>
+
+#include "version.h"
+#include "config.h"
+#include "types.h"
+#include "util.h"
+
+/* Options are global */
+struct opt
+{
+ const char *devmem;
+ unsigned int flags;
+ unsigned char pir;
+};
+static struct opt opt;
+
+#define FLAG_VERSION (1 << 0)
+#define FLAG_HELP (1 << 1)
+
+#define PIR_SHORT 0
+#define PIR_FULL 1
+
+struct bios_entry {
+ const char *anchor;
+ size_t anchor_len; /* computed */
+ off_t low_address;
+ off_t high_address;
+ size_t (*length)(const u8 *);
+ int (*decode)(const u8*, size_t);
+};
+
+
+/*
+ * SMBIOS
+ */
+
+static size_t smbios3_length(const u8 *p)
+{
+ return p[0x06];
+}
+
+static int smbios3_decode(const u8 *p, size_t len)
+{
+ if (len < 0x18 || !checksum(p, p[0x06]))
+ return 0;
+
+ printf("SMBIOS %u.%u.%u present.\n",
+ p[0x07], p[0x08], p[0x09]);
+ printf("\tStructure Table Maximum Length: %u bytes\n",
+ DWORD(p + 0x0C));
+ printf("\tStructure Table 64-bit Address: 0x%08X%08X\n",
+ QWORD(p + 0x10).h, QWORD(p + 0x10).l);
+
+ return 1;
+}
+
+static size_t smbios_length(const u8 *p)
+{
+ return p[0x05] == 0x1E ? 0x1F : p[0x05];
+}
+
+static int smbios_decode(const u8 *p, size_t len)
+{
+ if (len < 0x1F || !checksum(p, p[0x05])
+ || memcmp("_DMI_", p + 0x10, 5) != 0
+ || !checksum(p + 0x10, 0x0F))
+ return 0;
+
+ printf("SMBIOS %u.%u present.\n",
+ p[0x06], p[0x07]);
+ printf("\tStructure Table Length: %u bytes\n",
+ WORD(p + 0x16));
+ printf("\tStructure Table Address: 0x%08X\n",
+ DWORD(p + 0x18));
+ printf("\tNumber Of Structures: %u\n",
+ WORD(p + 0x1C));
+ printf("\tMaximum Structure Size: %u bytes\n",
+ WORD(p + 0x08));
+
+ return 1;
+}
+
+static size_t dmi_length(const u8 *p)
+{
+ (void) p;
+
+ return 0x0F;
+}
+
+static int dmi_decode(const u8 *p, size_t len)
+{
+ if (len < 0x0F || !checksum(p, len))
+ return 0;
+
+ printf("Legacy DMI %u.%u present.\n",
+ p[0x0E]>>4, p[0x0E] & 0x0F);
+ printf("\tStructure Table Length: %u bytes\n",
+ WORD(p + 0x06));
+ printf("\tStructure Table Address: 0x%08X\n",
+ DWORD(p + 0x08));
+ printf("\tNumber Of Structures: %u\n",
+ WORD(p + 0x0C));
+
+ return 1;
+}
+
+/*
+ * SYSID
+ */
+
+static size_t sysid_length(const u8 *p)
+{
+ return WORD(p + 0x08);
+}
+
+static int sysid_decode(const u8 *p, size_t len)
+{
+ if (len < 0x11 || !checksum(p, WORD(p + 0x08)))
+ return 0;
+
+ printf("SYSID present.\n");
+ printf("\tRevision: %u\n",
+ p[0x10]);
+ printf("\tStructure Table Address: 0x%08X\n",
+ DWORD(p + 0x0A));
+ printf("\tNumber Of Structures: %u\n",
+ WORD(p + 0x0E));
+
+ return 1;
+}
+
+/*
+ * PnP
+ */
+
+static size_t pnp_length(const u8 *p)
+{
+ return p[0x05];
+}
+
+static const char *pnp_event_notification(u8 code)
+{
+ static const char *notification[] = {
+ "Not Supported", /* 0x0 */
+ "Polling",
+ "Asynchronous",
+ "Unknown" /* 0x3 */
+ };
+
+ return notification[code];
+}
+
+static int pnp_decode(const u8 *p, size_t len)
+{
+ if (len < 0x21 || !checksum(p, p[0x05]))
+ return 0;
+
+ printf("PNP BIOS %u.%u present.\n",
+ p[0x04] >> 4, p[0x04] & 0x0F);
+ printf("\tEvent Notification: %s\n",
+ pnp_event_notification(WORD(p + 0x06) & 0x03));
+ if ((WORD(p + 0x06) & 0x03) == 0x01)
+ printf("\tEvent Notification Flag Address: 0x%08X\n",
+ DWORD(p + 0x09));
+ printf("\tReal Mode 16-bit Code Address: %04X:%04X\n",
+ WORD(p + 0x0F), WORD(p + 0x0D));
+ printf("\tReal Mode 16-bit Data Address: %04X:0000\n",
+ WORD(p + 0x1B));
+ printf("\t16-bit Protected Mode Code Address: 0x%08X\n",
+ DWORD(p + 0x13) + WORD(p + 0x11));
+ printf("\t16-bit Protected Mode Data Address: 0x%08X\n",
+ DWORD(p + 0x1D));
+ if (DWORD(p + 0x17) != 0)
+ printf("\tOEM Device Identifier: %c%c%c%02X%02X\n",
+ 0x40 + ((p[0x17] >> 2) & 0x1F),
+ 0x40 + ((p[0x17] & 0x03) << 3) + ((p[0x18] >> 5) & 0x07),
+ 0x40 + (p[0x18] & 0x1F), p[0x19], p[0x20]);
+
+ return 1;
+}
+
+/*
+ * ACPI
+ */
+
+static size_t acpi_length(const u8 *p)
+{
+ return p[15] == 2 ? 36 : 20;
+}
+
+static const char *acpi_revision(u8 code)
+{
+ switch (code)
+ {
+ case 0:
+ return " 1.0";
+ case 2:
+ return " 2.0";
+ default:
+ return "";
+ }
+}
+
+static int acpi_decode(const u8 *p, size_t len)
+{
+ if (len < 20 || !checksum(p, 20))
+ return 0;
+
+ printf("ACPI%s present.\n",
+ acpi_revision(p[15]));
+ printf("\tOEM Identifier: %c%c%c%c%c%c\n",
+ p[9], p[10], p[11], p[12], p[13], p[14]);
+ printf("\tRSD Table 32-bit Address: 0x%08X\n",
+ DWORD(p + 16));
+
+ if (len < 36)
+ return 1;
+
+ if (DWORD(p + 20) > len || !checksum(p, DWORD(p + 20)))
+ return 0;
+
+ if (DWORD(p + 20) < 32) return 1;
+
+ printf("\tXSD Table 64-bit Address: 0x%08X%08X\n",
+ QWORD(p + 24).h, QWORD(p + 24).l);
+
+ return 1;
+}
+
+/*
+ * Sony
+ */
+
+static size_t sony_length(const u8 *p)
+{
+ return p[0x05];
+}
+
+static int sony_decode(const u8 *p, size_t len)
+{
+ if (!checksum(p, len))
+ return 0;
+
+ printf("Sony system detected.\n");
+
+ return 1;
+}
+
+/*
+ * BIOS32
+ */
+
+static size_t bios32_length(const u8 *p)
+{
+ return p[0x09] << 4;
+}
+
+static int bios32_decode(const u8 *p, size_t len)
+{
+ if (len < 0x0A || !checksum(p, p[0x09] << 4))
+ return 0;
+
+ printf("BIOS32 Service Directory present.\n");
+ printf("\tRevision: %u\n",
+ p[0x08]);
+ printf("\tCalling Interface Address: 0x%08X\n",
+ DWORD(p + 0x04));
+
+ return 1;
+}
+
+/*
+ * PIR
+ */
+
+static void pir_irqs(u16 code)
+{
+ if (code == 0)
+ printf(" None");
+ else
+ {
+ u8 i;
+
+ for (i = 0; i < 16; i++)
+ if (code & (1 << i))
+ printf(" %u", i);
+ }
+}
+
+static void pir_slot_number(u8 code)
+{
+ if (code == 0)
+ printf(" on-board");
+ else
+ printf(" slot %u", code);
+}
+
+static size_t pir_length(const u8 *p)
+{
+ return WORD(p + 6);
+}
+
+static void pir_link_bitmap(char letter, const u8 *p)
+{
+ if (p[0] == 0) /* Not connected */
+ return;
+
+ printf("\t\tINT%c#: Link 0x%02x, IRQ Bitmap", letter, p[0]);
+ pir_irqs(WORD(p + 1));
+ printf("\n");
+}
+
+static int pir_decode(const u8 *p, size_t len)
+{
+ int i, n;
+
+ if (len < 32 || !checksum(p, WORD(p + 6)))
+ return 0;
+
+ printf("PCI Interrupt Routing %u.%u present.\n",
+ p[5], p[4]);
+ printf("\tRouter Device: %02x:%02x.%1x\n",
+ p[8], p[9]>>3, p[9] & 0x07);
+ printf("\tExclusive IRQs:");
+ pir_irqs(WORD(p + 10));
+ printf("\n");
+ if (DWORD(p + 12) != 0)
+ printf("\tCompatible Router: %04x:%04x\n",
+ WORD(p + 12), WORD(p + 14));
+ if (DWORD(p + 16) != 0)
+ printf("\tMiniport Data: 0x%08X\n",
+ DWORD(p + 16));
+
+ n = (len - 32) / 16;
+ for (i = 1, p += 32; i <= n; i++, p += 16)
+ {
+ printf("\tDevice: %02x:%02x,", p[0], p[1] >> 3);
+ pir_slot_number(p[14]);
+ printf("\n");
+ if (opt.pir == PIR_FULL)
+ {
+ pir_link_bitmap('A', p + 2);
+ pir_link_bitmap('B', p + 5);
+ pir_link_bitmap('C', p + 8);
+ pir_link_bitmap('D', p + 11);
+ }
+ }
+
+ return 1;
+}
+
+/*
+ * Compaq-specific entries
+ */
+
+static size_t compaq_length(const u8 *p)
+{
+ return p[4] * 10 + 5;
+}
+
+static int compaq_decode(const u8 *p, size_t len)
+{
+ unsigned int i;
+ (void) len;
+
+ printf("Compaq-specific entries present.\n");
+
+ /* integrity checking (lack of checksum) */
+ for (i = 0; i < p[4]; i++)
+ {
+ /*
+ * We do not check for truncated entries, because the length
+ * was computed from the number of records in compaq_length
+ * right above, so it can't be wrong.
+ */
+ if (p[5 + i * 10] != '$'
+ || !(p[6 + i * 10] >= 'A' && p[6 + i * 10] <= 'Z')
+ || !(p[7 + i * 10] >= 'A' && p[7 + i * 10] <= 'Z')
+ || !(p[8 + i * 10] >= 'A' && p[8 + i * 10] <= 'Z'))
+ {
+ printf("\t Abnormal entry! Please report. [%02X %02X "
+ "%02X %02X]\n", p[5 + i * 10], p[6 + i * 10],
+ p[7 + i * 10], p[8 + i * 10]);
+ return 0;
+ }
+ }
+
+ for (i = 0; i < p[4]; i++)
+ {
+ printf("\tEntry %u: %c%c%c%c at 0x%08X (%u bytes)\n",
+ i + 1, p[5 + i * 10], p[6 + i * 10], p[7 + i * 10],
+ p[8 + i * 10], DWORD(p + 9 + i * 10),
+ WORD(p + 13 + i * 10));
+ }
+
+ return 1;
+}
+
+/*
+ * VPD (vital product data, IBM-specific)
+ */
+
+static void vpd_print_entry(const char *name, const u8 *p, size_t len)
+{
+ size_t i;
+
+ printf("\t%s: ", name);
+ for (i = 0; i < len; i++)
+ if (p[i] >= 32 && p[i] < 127)
+ printf("%c", p[i]);
+ printf("\n");
+}
+
+static size_t vpd_length(const u8 *p)
+{
+ return p[5];
+}
+
+static int vpd_decode(const u8 *p, size_t len)
+{
+ if (len < 0x30)
+ return 0;
+
+ /* XSeries have longer records. */
+ if (!(len >= 0x45 && checksum(p, len))
+ /* Some Netvista seem to work with this. */
+ && !checksum(p, 0x30)
+ /* The Thinkpad checksum does *not* include the first 13 bytes. */
+ && !checksum(p + 0x0D, 0x30 - 0x0D))
+ return 0;
+
+ printf("VPD present.\n");
+
+ vpd_print_entry("BIOS Build ID", p + 0x0D, 9);
+ vpd_print_entry("Box Serial Number", p + 0x16, 7);
+ vpd_print_entry("Motherboard Serial Number", p + 0x1D, 11);
+ vpd_print_entry("Machine Type/Model", p + 0x28, 7);
+
+ if (len < 0x45)
+ return 1;
+
+ vpd_print_entry("BIOS Release Date", p + 0x30, 8);
+
+ return 1;
+}
+
+/*
+ * Fujitsu application panel
+ */
+
+static size_t fjkeyinf_length(const u8 *p)
+{
+ (void) p;
+ /*
+ * We don't know at this point, it's somewhere between 12 and 32.
+ * So we return the max, it shouldn't hurt.
+ */
+ return 32;
+}
+
+static int fjkeyinf_decode(const u8 *p, size_t len)
+{
+ int i;
+ (void) len;
+
+ printf("Fujitsu application panel present.\n");
+
+ for (i = 0; i < 6; i++)
+ {
+ if (*(p + 8 + i * 4) == 0)
+ return 1;
+ printf("\tDevice %d: type %u, chip %u", i + 1,
+ *(p + 8 + i * 4), *(p + 8 + i * 4 + 2));
+ if (*(p + 8 + i * 4 + 1)) /* Access method */
+ printf(", SMBus address 0x%x",
+ *(p + 8 + i * 4 + 3) >> 1);
+ printf("\n");
+ }
+
+ return 1;
+}
+
+/*
+ * Intel Multiprocessor
+ */
+
+static size_t mp_length(const u8 *p)
+{
+ return 16 * p[8];
+}
+
+static int mp_decode(const u8 *p, size_t len)
+{
+ if (!checksum(p, len))
+ return 0;
+
+ printf("Intel Multiprocessor present.\n");
+ printf("\tSpecification Revision: %s\n",
+ p[9] == 0x01 ? "1.1" : p[9] == 0x04 ? "1.4" : "Invalid");
+ if (p[11])
+ printf("\tDefault Configuration: #%d\n", p[11]);
+ else
+ printf("\tConfiguration Table Address: 0x%08X\n",
+ DWORD(p + 4));
+ printf("\tMode: %s\n", p[12] & (1 << 7) ?
+ "IMCR and PIC" : "Virtual Wire");
+
+ return 1;
+}
+
+/*
+ * Main
+ */
+
+static struct bios_entry bios_entries[] = {
+ { "_SM3_", 0, 0xF0000, 0xFFFFF, smbios3_length, smbios3_decode },
+ { "_SM_", 0, 0xF0000, 0xFFFFF, smbios_length, smbios_decode },
+ { "_DMI_", 0, 0xF0000, 0xFFFFF, dmi_length, dmi_decode },
+ { "_SYSID_", 0, 0xE0000, 0xFFFFF, sysid_length, sysid_decode },
+ { "$PnP", 0, 0xF0000, 0xFFFFF, pnp_length, pnp_decode },
+ { "RSD PTR ", 0, 0xE0000, 0xFFFFF, acpi_length, acpi_decode },
+ { "$SNY", 0, 0xE0000, 0xFFFFF, sony_length, sony_decode },
+ { "_32_", 0, 0xE0000, 0xFFFFF, bios32_length, bios32_decode },
+ { "$PIR", 0, 0xF0000, 0xFFFFF, pir_length, pir_decode },
+ { "32OS", 0, 0xE0000, 0xFFFFF, compaq_length, compaq_decode },
+ { "\252\125VPD", 0, 0xF0000, 0xFFFFF, vpd_length, vpd_decode },
+ { "FJKEYINF", 0, 0xF0000, 0xFFFFF, fjkeyinf_length, fjkeyinf_decode },
+ { "_MP_", 0, 0xE0000, 0xFFFFF, mp_length, mp_decode },
+ { NULL, 0, 0, 0, NULL, NULL }
+};
+
+/* Believe it or not, this is significantly faster than memcmp */
+static int anchor_match(const struct bios_entry *entry, const char *p)
+{
+ size_t i;
+
+ for (i = 0; i < entry->anchor_len; i++)
+ if (entry->anchor[i] != p[i])
+ return 0;
+
+ return 1;
+}
+
+/* Return -1 on error, 0 on success */
+static int parse_command_line(int argc, char * const argv[])
+{
+ int option;
+ const char *optstring = "d:hV";
+ struct option longopts[] = {
+ { "dev-mem", required_argument, NULL, 'd' },
+ { "pir", required_argument, NULL, 'P' },
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, 'V' },
+ { NULL, 0, NULL, 0 }
+ };
+
+ while ((option = getopt_long(argc, argv, optstring, longopts, NULL)) != -1)
+ switch (option)
+ {
+ case 'd':
+ opt.devmem = optarg;
+ break;
+ case 'P':
+ if (strcmp(optarg, "full") == 0)
+ opt.pir = PIR_FULL;
+ break;
+ case 'h':
+ opt.flags |= FLAG_HELP;
+ break;
+ case 'V':
+ opt.flags |= FLAG_VERSION;
+ break;
+ case '?':
+ return -1;
+ }
+
+ return 0;
+}
+
+static void print_help(void)
+{
+ static const char *help =
+ "Usage: biosdecode [OPTIONS]\n"
+ "Options are:\n"
+ " -d, --dev-mem FILE Read memory from device FILE (default: " DEFAULT_MEM_DEV ")\n"
+ " --pir full Decode the details of the PCI IRQ routing table\n"
+ " -h, --help Display this help text and exit\n"
+ " -V, --version Display the version and exit\n";
+
+ printf("%s", help);
+}
+
+int main(int argc, char * const argv[])
+{
+ u8 *buf;
+ off_t fp;
+ int i;
+
+ if (sizeof(u8) != 1 || sizeof(u16) != 2 || sizeof(u32) != 4)
+ {
+ fprintf(stderr, "%s: compiler incompatibility\n", argv[0]);
+ exit(255);
+ }
+
+ /* Set default option values */
+ opt.devmem = DEFAULT_MEM_DEV;
+ opt.flags = 0;
+
+ if (parse_command_line(argc, argv) < 0)
+ exit(2);
+
+ if (opt.flags & FLAG_HELP)
+ {
+ print_help();
+ return 0;
+ }
+
+ if (opt.flags & FLAG_VERSION)
+ {
+ printf("%s\n", VERSION);
+ return 0;
+ }
+
+ printf("# biosdecode %s\n", VERSION);
+
+ if ((buf = mem_chunk(0xE0000, 0x20000, opt.devmem)) == NULL)
+ exit(1);
+
+ /* Compute anchor lengths once and for all */
+ for (i = 0; bios_entries[i].anchor != NULL; i++)
+ bios_entries[i].anchor_len = strlen(bios_entries[i].anchor);
+
+ for (fp = 0xE0000; fp <= 0xFFFF0; fp += 16)
+ {
+ u8 *p = buf + fp - 0xE0000;
+
+ for (i = 0; bios_entries[i].anchor != NULL; i++)
+ {
+ if (anchor_match(&bios_entries[i], (char *)p)
+ && fp >= bios_entries[i].low_address
+ && fp < bios_entries[i].high_address)
+ {
+ off_t len = bios_entries[i].length(p);
+
+ if (fp + len - 1 <= bios_entries[i].high_address)
+ {
+ if (bios_entries[i].decode(p, len))
+ {
+ fp += (((len - 1) >> 4) << 4);
+ break;
+ }
+ }
+ }
+ }
+ }
+
+ free(buf);
+
+ return 0;
+}