freebsd-dev/sys/boot/i386/libi386/smbios.c

252 lines
6.9 KiB
C

/*-
* Copyright (c) 2005, 2006 Jung-uk Kim <jkim@FreeBSD.org>
* 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.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, 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 DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stand.h>
#include <bootstrap.h>
#include "btxv86.h"
#include "libi386.h"
/*
* Detect SMBIOS and export information about the SMBIOS into the
* environment.
*
* System Management BIOS Reference Specification, v2.4 Final
* http://www.dmtf.org/standards/published_documents/DSP0134.pdf
*/
/*
* Spec. 2.1.1 SMBIOS Structure Table Entry Point
*
* 'The SMBIOS Entry Point structure, described below, can be located by
* application software by searching for the anchor-string on paragraph
* (16-byte) boundaries within the physical memory address range
* 000F0000h to 000FFFFFh.'
*/
#define SMBIOS_START 0xf0000
#define SMBIOS_LENGTH 0x10000
#define SMBIOS_STEP 0x10
#define SMBIOS_SIG "_SM_"
#define SMBIOS_DMI_SIG "_DMI_"
static uint8_t smbios_enabled_sockets = 0;
static uint8_t smbios_populated_sockets = 0;
static uint8_t *smbios_parse_table(const uint8_t *dmi);
static void smbios_setenv(const char *name, const uint8_t *dmi,
const int offset);
static uint8_t smbios_checksum(const caddr_t addr, const uint8_t len);
static uint8_t *smbios_sigsearch(const caddr_t addr, const uint32_t len);
#ifdef SMBIOS_SERIAL_NUMBERS
static void smbios_setuuid(const char *name, const uint8_t *dmi,
const int offset);
#endif
void
smbios_detect(void)
{
uint8_t *smbios, *dmi, *addr;
uint16_t i, length, count;
uint32_t paddr;
char buf[4];
/* locate and validate the SMBIOS */
smbios = smbios_sigsearch(PTOV(SMBIOS_START), SMBIOS_LENGTH);
if (smbios == NULL)
return;
length = *(uint16_t *)(smbios + 0x16); /* Structure Table Length */
paddr = *(uint32_t *)(smbios + 0x18); /* Structure Table Address */
count = *(uint16_t *)(smbios + 0x1c); /* No of SMBIOS Structures */
for (dmi = addr = PTOV(paddr), i = 0;
dmi - addr < length && i < count; i++)
dmi = smbios_parse_table(dmi);
sprintf(buf, "%d", smbios_enabled_sockets);
setenv("smbios.socket.enabled", buf, 1);
sprintf(buf, "%d", smbios_populated_sockets);
setenv("smbios.socket.populated", buf, 1);
}
static uint8_t *
smbios_parse_table(const uint8_t *dmi)
{
uint8_t *dp;
switch(dmi[0]) {
case 0: /* Type 0: BIOS */
smbios_setenv("smbios.bios.vendor", dmi, 0x04);
smbios_setenv("smbios.bios.version", dmi, 0x05);
smbios_setenv("smbios.bios.reldate", dmi, 0x08);
break;
case 1: /* Type 1: System */
smbios_setenv("smbios.system.maker", dmi, 0x04);
smbios_setenv("smbios.system.product", dmi, 0x05);
smbios_setenv("smbios.system.version", dmi, 0x06);
#ifdef SMBIOS_SERIAL_NUMBERS
smbios_setenv("smbios.system.serial", dmi, 0x07);
smbios_setuuid("smbios.system.uuid", dmi, 0x08);
#endif
break;
case 2: /* Type 2: Base Board (or Module) */
smbios_setenv("smbios.planar.maker", dmi, 0x04);
smbios_setenv("smbios.planar.product", dmi, 0x05);
smbios_setenv("smbios.planar.version", dmi, 0x06);
#ifdef SMBIOS_SERIAL_NUMBERS
smbios_setenv("smbios.planar.serial", dmi, 0x07);
#endif
break;
case 3: /* Type 3: System Enclosure or Chassis */
smbios_setenv("smbios.chassis.maker", dmi, 0x04);
smbios_setenv("smbios.chassis.version", dmi, 0x06);
#ifdef SMBIOS_SERIAL_NUMBERS
smbios_setenv("smbios.chassis.serial", dmi, 0x07);
smbios_setenv("smbios.chassis.tag", dmi, 0x08);
#endif
break;
case 4: /* Type 4: Processor Information */
/*
* Offset 18h: Processor Status
*
* Bit 7 Reserved, must be 0
* Bit 6 CPU Socket Populated
* 1 - CPU Socket Populated
* 0 - CPU Socket Unpopulated
* Bit 5:3 Reserved, must be zero
* Bit 2:0 CPU Status
* 0h - Unknown
* 1h - CPU Enabled
* 2h - CPU Disabled by User via BIOS Setup
* 3h - CPU Disabled by BIOS (POST Error)
* 4h - CPU is Idle, waiting to be enabled
* 5-6h - Reserved
* 7h - Other
*/
if ((dmi[0x18] & 0x07) == 1)
smbios_enabled_sockets++;
if (dmi[0x18] & 0x40)
smbios_populated_sockets++;
break;
default: /* skip other types */
break;
}
/* find structure terminator */
dp = __DECONST(uint8_t *, dmi + dmi[1]);
while (dp[0] != 0 || dp[1] != 0)
dp++;
return(dp + 2);
}
static void
smbios_setenv(const char *name, const uint8_t *dmi, const int offset)
{
char *cp = __DECONST(char *, dmi + dmi[1]);
int i;
/* skip undefined string */
if (dmi[offset] == 0)
return;
for (i = 0; i < dmi[offset] - 1; i++)
cp += strlen(cp) + 1;
setenv(name, cp, 1);
}
static uint8_t
smbios_checksum(const caddr_t addr, const uint8_t len)
{
const uint8_t *cp = addr;
uint8_t sum;
int i;
for (sum = 0, i = 0; i < len; i++)
sum += cp[i];
return(sum);
}
static uint8_t *
smbios_sigsearch(const caddr_t addr, const uint32_t len)
{
caddr_t cp;
/* search on 16-byte boundaries */
for (cp = addr; cp < addr + len; cp += SMBIOS_STEP) {
/* compare signature, validate checksum */
if (!strncmp(cp, SMBIOS_SIG, 4)) {
if (smbios_checksum(cp, *(uint8_t *)(cp + 0x05)))
continue;
if (strncmp(cp + 0x10, SMBIOS_DMI_SIG, 5))
continue;
if (smbios_checksum(cp + 0x10, 0x0f))
continue;
return(cp);
}
}
return(NULL);
}
#ifdef SMBIOS_SERIAL_NUMBERS
static void
smbios_setuuid(const char *name, const uint8_t *dmi, const int offset)
{
const uint8_t *idp = dmi + offset;
int i, f = 0, z = 0;
char uuid[37];
for (i = 0; i < 16; i++) {
if (idp[i] == 0xff)
f++;
else if (idp[i] == 0x00)
z++;
else
break;
}
if (f != 16 && z != 16) {
sprintf(uuid, "%02x%02x%02x%02x-"
"%02x%02x-%02x%02x-%02x%02x-"
"%02x%02x%02x%02x%02x%02x",
idp[0], idp[1], idp[2], idp[3],
idp[4], idp[5], idp[6], idp[7], idp[8], idp[9],
idp[10], idp[11], idp[12], idp[13], idp[14], idp[15]);
setenv(name, uuid, 1);
}
}
#endif