352 lines
10 KiB
C
352 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 byteorder, 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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#if defined(SMBIOS_LITTLE_ENDIAN_UUID)
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byteorder = LITTLE_ENDIAN;
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#elif defined(SMBIOS_NETWORK_ENDIAN_UUID)
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byteorder = BIG_ENDIAN;
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#else
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byteorder = ver < 0x0206 ? BIG_ENDIAN : LITTLE_ENDIAN;
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#endif
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if (byteorder != LITTLE_ENDIAN) {
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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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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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