ac5c83d9f3
- First three fields of system UUID may be little-endian as described in SMBIOS Specification v2.6. For now, we keep the network byte order for backward compatibility (and consistency with popular dmidecode tool) if SMBIOS table revision is less than 2.6. However, little-endian format can be forced by defining BOOT_LITTLE_ENDIAN_UUID from make.conf(5) if it is necessary. - Replace overly ambitious optimizations with more readable code. - Update comments to SMBIOS Specification v2.6 and clean up style(9) bugs.
348 lines
10 KiB
C
348 lines
10 KiB
C
/*-
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* Copyright (c) 2005-2009 Jung-uk Kim <jkim@FreeBSD.org>
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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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stand.h>
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#include <bootstrap.h>
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#include <sys/endian.h>
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#include "btxv86.h"
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#include "libi386.h"
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/*
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* Detect SMBIOS and export information about the SMBIOS into the
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* environment.
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*
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* System Management BIOS Reference Specification, v2.6 Final
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* http://www.dmtf.org/standards/published_documents/DSP0134_2.6.0.pdf
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*/
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/*
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* 2.1.1 SMBIOS Structure Table Entry Point
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*
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* "On non-EFI systems, the SMBIOS Entry Point structure, described below, can
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* be located by application software by searching for the anchor-string on
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* paragraph (16-byte) boundaries within the physical memory address range
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* 000F0000h to 000FFFFFh. This entry point encapsulates an intermediate anchor
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* string that is used by some existing DMI browsers."
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*/
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#define SMBIOS_START 0xf0000
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#define SMBIOS_LENGTH 0x10000
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#define SMBIOS_STEP 0x10
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#define SMBIOS_SIG "_SM_"
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#define SMBIOS_DMI_SIG "_DMI_"
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#define SMBIOS_GET8(base, off) (*(uint8_t *)((base) + (off)))
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#define SMBIOS_GET16(base, off) (*(uint16_t *)((base) + (off)))
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#define SMBIOS_GET32(base, off) (*(uint32_t *)((base) + (off)))
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#define SMBIOS_GETLEN(base) SMBIOS_GET8(base, 0x01)
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#define SMBIOS_GETSTR(base) ((base) + SMBIOS_GETLEN(base))
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static uint32_t smbios_enabled_memory = 0;
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static uint32_t smbios_old_enabled_memory = 0;
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static uint8_t smbios_enabled_sockets = 0;
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static uint8_t smbios_populated_sockets = 0;
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static uint8_t
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smbios_checksum(const caddr_t addr, const uint8_t len)
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{
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uint8_t sum;
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int i;
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for (sum = 0, i = 0; i < len; i++)
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sum += SMBIOS_GET8(addr, i);
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return (sum);
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}
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static caddr_t
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smbios_sigsearch(const caddr_t addr, const uint32_t len)
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{
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caddr_t cp;
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/* Search on 16-byte boundaries. */
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for (cp = addr; cp < addr + len; cp += SMBIOS_STEP)
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if (strncmp(cp, SMBIOS_SIG, 4) == 0 &&
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smbios_checksum(cp, SMBIOS_GET8(cp, 0x05)) == 0 &&
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strncmp(cp + 0x10, SMBIOS_DMI_SIG, 5) == 0 &&
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smbios_checksum(cp + 0x10, 0x0f) == 0)
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return (cp);
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return (NULL);
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}
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static void
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smbios_setenv(const char *name, caddr_t addr, const int offset)
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{
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caddr_t cp;
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int i, idx;
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idx = SMBIOS_GET8(addr, offset);
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if (idx != 0) {
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cp = SMBIOS_GETSTR(addr);
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for (i = 1; i < idx; i++)
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cp += strlen(cp) + 1;
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setenv(name, cp, 1);
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}
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}
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#ifdef SMBIOS_SERIAL_NUMBERS
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#define UUID_SIZE 16
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#define UUID_TYPE uint32_t
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#define UUID_STEP sizeof(UUID_TYPE)
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#define UUID_ALL_BITS (UUID_SIZE / UUID_STEP)
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#define UUID_GET(base, off) (*(UUID_TYPE *)((base) + (off)))
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static void
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smbios_setuuid(const char *name, const caddr_t addr, const int ver)
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{
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char uuid[37];
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int i, ones, zeros;
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UUID_TYPE n;
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uint32_t f1;
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uint16_t f2, f3;
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for (i = 0, ones = 0, zeros = 0; i < UUID_SIZE; i += UUID_STEP) {
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n = UUID_GET(addr, i) + 1;
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if (zeros == 0 && n == 0)
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ones++;
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else if (ones == 0 && n == 1)
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zeros++;
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else
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break;
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}
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if (ones != UUID_ALL_BITS && zeros != UUID_ALL_BITS) {
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/*
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* 3.3.2.1 System UUID
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*
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* "Although RFC 4122 recommends network byte order for all
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* fields, the PC industry (including the ACPI, UEFI, and
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* Microsoft specifications) has consistently used
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* little-endian byte encoding for the first three fields:
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* time_low, time_mid, time_hi_and_version. The same encoding,
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* also known as wire format, should also be used for the
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* SMBIOS representation of the UUID."
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*
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* Note: We use network byte order for backward compatibility
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* unless SMBIOS version is 2.6+ or little-endian is forced.
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*/
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#ifndef SMBIOS_LITTLE_ENDIAN_UUID
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if (ver < 0x0206) {
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f1 = ntohl(SMBIOS_GET32(addr, 0));
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f2 = ntohs(SMBIOS_GET16(addr, 4));
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f3 = ntohs(SMBIOS_GET16(addr, 6));
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} else
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#endif
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{
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f1 = le32toh(SMBIOS_GET32(addr, 0));
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f2 = le16toh(SMBIOS_GET16(addr, 4));
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f3 = le16toh(SMBIOS_GET16(addr, 6));
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}
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sprintf(uuid,
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"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
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f1, f2, f3, SMBIOS_GET8(addr, 8), SMBIOS_GET8(addr, 9),
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SMBIOS_GET8(addr, 10), SMBIOS_GET8(addr, 11),
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SMBIOS_GET8(addr, 12), SMBIOS_GET8(addr, 13),
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SMBIOS_GET8(addr, 14), SMBIOS_GET8(addr, 15));
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setenv(name, uuid, 1);
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}
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}
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#undef UUID_SIZE
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#undef UUID_TYPE
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#undef UUID_STEP
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#undef UUID_ALL_BITS
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#undef UUID_GET
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#endif
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static caddr_t
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smbios_parse_table(const caddr_t addr, const int ver)
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{
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caddr_t cp;
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int proc, size, osize, type;
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type = SMBIOS_GET8(addr, 0); /* 3.1.2 Structure Header Format */
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switch(type) {
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case 0: /* 3.3.1 BIOS Information (Type 0) */
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smbios_setenv("smbios.bios.vendor", addr, 0x04);
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smbios_setenv("smbios.bios.version", addr, 0x05);
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smbios_setenv("smbios.bios.reldate", addr, 0x08);
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break;
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case 1: /* 3.3.2 System Information (Type 1) */
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smbios_setenv("smbios.system.maker", addr, 0x04);
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smbios_setenv("smbios.system.product", addr, 0x05);
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smbios_setenv("smbios.system.version", addr, 0x06);
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#ifdef SMBIOS_SERIAL_NUMBERS
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smbios_setenv("smbios.system.serial", addr, 0x07);
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smbios_setuuid("smbios.system.uuid", addr + 0x08, ver);
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#endif
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break;
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case 2: /* 3.3.3 Base Board (or Module) Information (Type 2) */
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smbios_setenv("smbios.planar.maker", addr, 0x04);
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smbios_setenv("smbios.planar.product", addr, 0x05);
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smbios_setenv("smbios.planar.version", addr, 0x06);
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#ifdef SMBIOS_SERIAL_NUMBERS
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smbios_setenv("smbios.planar.serial", addr, 0x07);
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#endif
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break;
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case 3: /* 3.3.4 System Enclosure or Chassis (Type 3) */
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smbios_setenv("smbios.chassis.maker", addr, 0x04);
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smbios_setenv("smbios.chassis.version", addr, 0x06);
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#ifdef SMBIOS_SERIAL_NUMBERS
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smbios_setenv("smbios.chassis.serial", addr, 0x07);
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smbios_setenv("smbios.chassis.tag", addr, 0x08);
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#endif
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break;
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case 4: /* 3.3.5 Processor Information (Type 4) */
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/*
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* Offset 18h: Processor Status
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*
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* Bit 7 Reserved, must be 0
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* Bit 6 CPU Socket Populated
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* 1 - CPU Socket Populated
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* 0 - CPU Socket Unpopulated
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* Bit 5:3 Reserved, must be zero
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* Bit 2:0 CPU Status
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* 0h - Unknown
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* 1h - CPU Enabled
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* 2h - CPU Disabled by User via BIOS Setup
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* 3h - CPU Disabled by BIOS (POST Error)
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* 4h - CPU is Idle, waiting to be enabled
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* 5-6h - Reserved
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* 7h - Other
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*/
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proc = SMBIOS_GET8(addr, 0x18);
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if ((proc & 0x07) == 1)
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smbios_enabled_sockets++;
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if ((proc & 0x40) != 0)
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smbios_populated_sockets++;
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break;
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case 6: /* 3.3.7 Memory Module Information (Type 6, Obsolete) */
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/*
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* Offset 0Ah: Enabled Size
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*
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* Bit 7 Bank connection
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* 1 - Double-bank connection
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* 0 - Single-bank connection
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* Bit 6:0 Size (n), where 2**n is the size in MB
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* 7Dh - Not determinable (Installed Size only)
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* 7Eh - Module is installed, but no memory
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* has been enabled
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* 7Fh - Not installed
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*/
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osize = SMBIOS_GET8(addr, 0x0a) & 0x7f;
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if (osize > 0 && osize < 22)
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smbios_old_enabled_memory += 1 << (osize + 10);
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break;
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case 17: /* 3.3.18 Memory Device (Type 17) */
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/*
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* Offset 0Ch: Size
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*
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* Bit 15 Granularity
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* 1 - Value is in kilobytes units
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* 0 - Value is in megabytes units
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* Bit 14:0 Size
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*/
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size = SMBIOS_GET16(addr, 0x0c);
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if (size != 0 && size != 0xffff)
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smbios_enabled_memory += (size & 0x8000) != 0 ?
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(size & 0x7fff) : (size << 10);
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break;
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default: /* skip other types */
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break;
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}
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/* Find structure terminator. */
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cp = SMBIOS_GETSTR(addr);
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while (SMBIOS_GET16(cp, 0) != 0)
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cp++;
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return (cp + 2);
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}
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void
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smbios_detect(void)
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{
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char buf[16];
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caddr_t addr, dmi, smbios;
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size_t count, length;
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uint32_t paddr;
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int i, major, minor, ver;
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/* Search signatures and validate checksums. */
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smbios = smbios_sigsearch(PTOV(SMBIOS_START), SMBIOS_LENGTH);
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if (smbios == NULL)
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return;
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length = SMBIOS_GET16(smbios, 0x16); /* Structure Table Length */
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paddr = SMBIOS_GET32(smbios, 0x18); /* Structure Table Address */
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count = SMBIOS_GET16(smbios, 0x1c); /* No of SMBIOS Structures */
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ver = SMBIOS_GET8(smbios, 0x1e); /* SMBIOS BCD Revision */
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if (ver != 0) {
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major = ver >> 4;
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minor = ver & 0x0f;
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if (major > 9 || minor > 9)
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ver = 0;
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}
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if (ver == 0) {
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major = SMBIOS_GET8(smbios, 0x06); /* SMBIOS Major Version */
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minor = SMBIOS_GET8(smbios, 0x07); /* SMBIOS Minor Version */
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}
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ver = (major << 8) | minor;
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addr = PTOV(paddr);
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for (dmi = addr, i = 0; dmi < addr + length && i < count; i++)
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dmi = smbios_parse_table(dmi, ver);
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sprintf(buf, "%d.%d", major, minor);
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setenv("smbios.version", buf, 1);
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if (smbios_enabled_memory > 0 || smbios_old_enabled_memory > 0) {
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sprintf(buf, "%u", smbios_enabled_memory > 0 ?
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smbios_enabled_memory : smbios_old_enabled_memory);
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setenv("smbios.memory.enabled", buf, 1);
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}
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if (smbios_enabled_sockets > 0) {
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sprintf(buf, "%u", smbios_enabled_sockets);
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setenv("smbios.socket.enabled", buf, 1);
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}
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if (smbios_populated_sockets > 0) {
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sprintf(buf, "%u", smbios_populated_sockets);
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setenv("smbios.socket.populated", buf, 1);
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}
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}
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