252 lines
6.9 KiB
C
252 lines
6.9 KiB
C
/*-
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* Copyright (c) 2005, 2006 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 "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, v2.4 Final
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* http://www.dmtf.org/standards/published_documents/DSP0134.pdf
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*/
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/*
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* Spec. 2.1.1 SMBIOS Structure Table Entry Point
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*
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* 'The SMBIOS Entry Point structure, described below, can be located by
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* application software by searching for the anchor-string on paragraph
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* (16-byte) boundaries within the physical memory address range
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* 000F0000h to 000FFFFFh.'
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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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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 *smbios_parse_table(const uint8_t *dmi);
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static void smbios_setenv(const char *name, const uint8_t *dmi,
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const int offset);
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static uint8_t smbios_checksum(const caddr_t addr, const uint8_t len);
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static uint8_t *smbios_sigsearch(const caddr_t addr, const uint32_t len);
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#ifdef SMBIOS_SERIAL_NUMBERS
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static void smbios_setuuid(const char *name, const uint8_t *dmi,
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const int offset);
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#endif
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void
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smbios_detect(void)
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{
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uint8_t *smbios, *dmi, *addr;
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uint16_t i, length, count;
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uint32_t paddr;
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char buf[4];
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/* locate and validate the SMBIOS */
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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 = *(uint16_t *)(smbios + 0x16); /* Structure Table Length */
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paddr = *(uint32_t *)(smbios + 0x18); /* Structure Table Address */
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count = *(uint16_t *)(smbios + 0x1c); /* No of SMBIOS Structures */
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for (dmi = addr = PTOV(paddr), i = 0;
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dmi - addr < length && i < count; i++)
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dmi = smbios_parse_table(dmi);
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sprintf(buf, "%d", smbios_enabled_sockets);
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setenv("smbios.socket.enabled", buf, 1);
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sprintf(buf, "%d", smbios_populated_sockets);
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setenv("smbios.socket.populated", buf, 1);
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}
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static uint8_t *
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smbios_parse_table(const uint8_t *dmi)
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{
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uint8_t *dp;
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switch(dmi[0]) {
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case 0: /* Type 0: BIOS */
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smbios_setenv("smbios.bios.vendor", dmi, 0x04);
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smbios_setenv("smbios.bios.version", dmi, 0x05);
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smbios_setenv("smbios.bios.reldate", dmi, 0x08);
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break;
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case 1: /* Type 1: System */
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smbios_setenv("smbios.system.maker", dmi, 0x04);
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smbios_setenv("smbios.system.product", dmi, 0x05);
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smbios_setenv("smbios.system.version", dmi, 0x06);
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#ifdef SMBIOS_SERIAL_NUMBERS
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smbios_setenv("smbios.system.serial", dmi, 0x07);
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smbios_setuuid("smbios.system.uuid", dmi, 0x08);
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#endif
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break;
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case 2: /* Type 2: Base Board (or Module) */
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smbios_setenv("smbios.planar.maker", dmi, 0x04);
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smbios_setenv("smbios.planar.product", dmi, 0x05);
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smbios_setenv("smbios.planar.version", dmi, 0x06);
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#ifdef SMBIOS_SERIAL_NUMBERS
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smbios_setenv("smbios.planar.serial", dmi, 0x07);
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#endif
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break;
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case 3: /* Type 3: System Enclosure or Chassis */
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smbios_setenv("smbios.chassis.maker", dmi, 0x04);
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smbios_setenv("smbios.chassis.version", dmi, 0x06);
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#ifdef SMBIOS_SERIAL_NUMBERS
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smbios_setenv("smbios.chassis.serial", dmi, 0x07);
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smbios_setenv("smbios.chassis.tag", dmi, 0x08);
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#endif
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break;
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case 4: /* Type 4: Processor Information */
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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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if ((dmi[0x18] & 0x07) == 1)
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smbios_enabled_sockets++;
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if (dmi[0x18] & 0x40)
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smbios_populated_sockets++;
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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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dp = __DECONST(uint8_t *, dmi + dmi[1]);
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while (dp[0] != 0 || dp[1] != 0)
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dp++;
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return(dp + 2);
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}
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static void
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smbios_setenv(const char *name, const uint8_t *dmi, const int offset)
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{
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char *cp = __DECONST(char *, dmi + dmi[1]);
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int i;
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/* skip undefined string */
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if (dmi[offset] == 0)
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return;
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for (i = 0; i < dmi[offset] - 1; 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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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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const uint8_t *cp = addr;
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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 += cp[i];
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return(sum);
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}
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static uint8_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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/* compare signature, validate checksum */
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if (!strncmp(cp, SMBIOS_SIG, 4)) {
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if (smbios_checksum(cp, *(uint8_t *)(cp + 0x05)))
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continue;
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if (strncmp(cp + 0x10, SMBIOS_DMI_SIG, 5))
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continue;
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if (smbios_checksum(cp + 0x10, 0x0f))
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continue;
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return(cp);
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}
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}
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return(NULL);
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}
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#ifdef SMBIOS_SERIAL_NUMBERS
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static void
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smbios_setuuid(const char *name, const uint8_t *dmi, const int offset)
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{
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const uint8_t *idp = dmi + offset;
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int i, f = 0, z = 0;
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char uuid[37];
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for (i = 0; i < 16; i++) {
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if (idp[i] == 0xff)
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f++;
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else if (idp[i] == 0x00)
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z++;
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else
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break;
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}
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if (f != 16 && z != 16) {
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sprintf(uuid, "%02X%02X%02X%02X-"
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"%02X%02X-%02X%02X-%02X%02X-"
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"%02X%02X%02X%02X%02X%02X",
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idp[0], idp[1], idp[2], idp[3],
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idp[4], idp[5], idp[6], idp[7], idp[8], idp[9],
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idp[10], idp[11], idp[12], idp[13], idp[14], idp[15]);
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setenv(name, uuid, 1);
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}
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}
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#endif
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