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/*-
* Copyright (c) 2005-2009 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: release/9.1.0/sys/boot/i386/libi386/smbios.c 190814 2009-04-07 17:58:15Z jkim $");
#include <stand.h>
#include <bootstrap.h>
#include <sys/endian.h>
#include "btxv86.h"
#include "libi386.h"
/*
* Detect SMBIOS and export information about the SMBIOS into the
* environment.
*
* System Management BIOS Reference Specification, v2.6 Final
* http://www.dmtf.org/standards/published_documents/DSP0134_2.6.0.pdf
*/
/*
* 2.1.1 SMBIOS Structure Table Entry Point
*
* "On non-EFI systems, 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. This entry point encapsulates an intermediate anchor
* string that is used by some existing DMI browsers."
*/
#define SMBIOS_START 0xf0000
#define SMBIOS_LENGTH 0x10000
#define SMBIOS_STEP 0x10
#define SMBIOS_SIG "_SM_"
#define SMBIOS_DMI_SIG "_DMI_"
#define SMBIOS_GET8(base, off) (*(uint8_t *)((base) + (off)))
#define SMBIOS_GET16(base, off) (*(uint16_t *)((base) + (off)))
#define SMBIOS_GET32(base, off) (*(uint32_t *)((base) + (off)))
#define SMBIOS_GETLEN(base) SMBIOS_GET8(base, 0x01)
#define SMBIOS_GETSTR(base) ((base) + SMBIOS_GETLEN(base))
static uint32_t smbios_enabled_memory = 0;
static uint32_t smbios_old_enabled_memory = 0;
static uint8_t smbios_enabled_sockets = 0;
static uint8_t smbios_populated_sockets = 0;
static uint8_t
smbios_checksum(const caddr_t addr, const uint8_t len)
{
uint8_t sum;
int i;
for (sum = 0, i = 0; i < len; i++)
sum += SMBIOS_GET8(addr, i);
return (sum);
}
static caddr_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)
if (strncmp(cp, SMBIOS_SIG, 4) == 0 &&
smbios_checksum(cp, SMBIOS_GET8(cp, 0x05)) == 0 &&
strncmp(cp + 0x10, SMBIOS_DMI_SIG, 5) == 0 &&
smbios_checksum(cp + 0x10, 0x0f) == 0)
return (cp);
return (NULL);
}
static void
smbios_setenv(const char *name, caddr_t addr, const int offset)
{
caddr_t cp;
int i, idx;
idx = SMBIOS_GET8(addr, offset);
if (idx != 0) {
cp = SMBIOS_GETSTR(addr);
for (i = 1; i < idx; i++)
cp += strlen(cp) + 1;
setenv(name, cp, 1);
}
}
#ifdef SMBIOS_SERIAL_NUMBERS
#define UUID_SIZE 16
#define UUID_TYPE uint32_t
#define UUID_STEP sizeof(UUID_TYPE)
#define UUID_ALL_BITS (UUID_SIZE / UUID_STEP)
#define UUID_GET(base, off) (*(UUID_TYPE *)((base) + (off)))
static void
smbios_setuuid(const char *name, const caddr_t addr, const int ver)
{
char uuid[37];
int i, ones, zeros;
UUID_TYPE n;
uint32_t f1;
uint16_t f2, f3;
for (i = 0, ones = 0, zeros = 0; i < UUID_SIZE; i += UUID_STEP) {
n = UUID_GET(addr, i) + 1;
if (zeros == 0 && n == 0)
ones++;
else if (ones == 0 && n == 1)
zeros++;
else
break;
}
if (ones != UUID_ALL_BITS && zeros != UUID_ALL_BITS) {
/*
* 3.3.2.1 System UUID
*
* "Although RFC 4122 recommends network byte order for all
* fields, the PC industry (including the ACPI, UEFI, and
* Microsoft specifications) has consistently used
* little-endian byte encoding for the first three fields:
* time_low, time_mid, time_hi_and_version. The same encoding,
* also known as wire format, should also be used for the
* SMBIOS representation of the UUID."
*
* Note: We use network byte order for backward compatibility
* unless SMBIOS version is 2.6+ or little-endian is forced.
*/
#ifndef SMBIOS_LITTLE_ENDIAN_UUID
if (ver < 0x0206) {
f1 = ntohl(SMBIOS_GET32(addr, 0));
f2 = ntohs(SMBIOS_GET16(addr, 4));
f3 = ntohs(SMBIOS_GET16(addr, 6));
} else
#endif
{
f1 = le32toh(SMBIOS_GET32(addr, 0));
f2 = le16toh(SMBIOS_GET16(addr, 4));
f3 = le16toh(SMBIOS_GET16(addr, 6));
}
sprintf(uuid,
"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
f1, f2, f3, SMBIOS_GET8(addr, 8), SMBIOS_GET8(addr, 9),
SMBIOS_GET8(addr, 10), SMBIOS_GET8(addr, 11),
SMBIOS_GET8(addr, 12), SMBIOS_GET8(addr, 13),
SMBIOS_GET8(addr, 14), SMBIOS_GET8(addr, 15));
setenv(name, uuid, 1);
}
}
#undef UUID_SIZE
#undef UUID_TYPE
#undef UUID_STEP
#undef UUID_ALL_BITS
#undef UUID_GET
#endif
static caddr_t
smbios_parse_table(const caddr_t addr, const int ver)
{
caddr_t cp;
int proc, size, osize, type;
type = SMBIOS_GET8(addr, 0); /* 3.1.2 Structure Header Format */
switch(type) {
case 0: /* 3.3.1 BIOS Information (Type 0) */
smbios_setenv("smbios.bios.vendor", addr, 0x04);
smbios_setenv("smbios.bios.version", addr, 0x05);
smbios_setenv("smbios.bios.reldate", addr, 0x08);
break;
case 1: /* 3.3.2 System Information (Type 1) */
smbios_setenv("smbios.system.maker", addr, 0x04);
smbios_setenv("smbios.system.product", addr, 0x05);
smbios_setenv("smbios.system.version", addr, 0x06);
#ifdef SMBIOS_SERIAL_NUMBERS
smbios_setenv("smbios.system.serial", addr, 0x07);
smbios_setuuid("smbios.system.uuid", addr + 0x08, ver);
#endif
break;
case 2: /* 3.3.3 Base Board (or Module) Information (Type 2) */
smbios_setenv("smbios.planar.maker", addr, 0x04);
smbios_setenv("smbios.planar.product", addr, 0x05);
smbios_setenv("smbios.planar.version", addr, 0x06);
#ifdef SMBIOS_SERIAL_NUMBERS
smbios_setenv("smbios.planar.serial", addr, 0x07);
#endif
break;
case 3: /* 3.3.4 System Enclosure or Chassis (Type 3) */
smbios_setenv("smbios.chassis.maker", addr, 0x04);
smbios_setenv("smbios.chassis.version", addr, 0x06);
#ifdef SMBIOS_SERIAL_NUMBERS
smbios_setenv("smbios.chassis.serial", addr, 0x07);
smbios_setenv("smbios.chassis.tag", addr, 0x08);
#endif
break;
case 4: /* 3.3.5 Processor Information (Type 4) */
/*
* 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
*/
proc = SMBIOS_GET8(addr, 0x18);
if ((proc & 0x07) == 1)
smbios_enabled_sockets++;
if ((proc & 0x40) != 0)
smbios_populated_sockets++;
break;
case 6: /* 3.3.7 Memory Module Information (Type 6, Obsolete) */
/*
* Offset 0Ah: Enabled Size
*
* Bit 7 Bank connection
* 1 - Double-bank connection
* 0 - Single-bank connection
* Bit 6:0 Size (n), where 2**n is the size in MB
* 7Dh - Not determinable (Installed Size only)
* 7Eh - Module is installed, but no memory
* has been enabled
* 7Fh - Not installed
*/
osize = SMBIOS_GET8(addr, 0x0a) & 0x7f;
if (osize > 0 && osize < 22)
smbios_old_enabled_memory += 1 << (osize + 10);
break;
case 17: /* 3.3.18 Memory Device (Type 17) */
/*
* Offset 0Ch: Size
*
* Bit 15 Granularity
* 1 - Value is in kilobytes units
* 0 - Value is in megabytes units
* Bit 14:0 Size
*/
size = SMBIOS_GET16(addr, 0x0c);
if (size != 0 && size != 0xffff)
smbios_enabled_memory += (size & 0x8000) != 0 ?
(size & 0x7fff) : (size << 10);
break;
default: /* skip other types */
break;
}
/* Find structure terminator. */
cp = SMBIOS_GETSTR(addr);
while (SMBIOS_GET16(cp, 0) != 0)
cp++;
return (cp + 2);
}
void
smbios_detect(void)
{
char buf[16];
caddr_t addr, dmi, smbios;
size_t count, length;
uint32_t paddr;
int i, major, minor, ver;
/* Search signatures and validate checksums. */
smbios = smbios_sigsearch(PTOV(SMBIOS_START), SMBIOS_LENGTH);
if (smbios == NULL)
return;
length = SMBIOS_GET16(smbios, 0x16); /* Structure Table Length */
paddr = SMBIOS_GET32(smbios, 0x18); /* Structure Table Address */
count = SMBIOS_GET16(smbios, 0x1c); /* No of SMBIOS Structures */
ver = SMBIOS_GET8(smbios, 0x1e); /* SMBIOS BCD Revision */
if (ver != 0) {
major = ver >> 4;
minor = ver & 0x0f;
if (major > 9 || minor > 9)
ver = 0;
}
if (ver == 0) {
major = SMBIOS_GET8(smbios, 0x06); /* SMBIOS Major Version */
minor = SMBIOS_GET8(smbios, 0x07); /* SMBIOS Minor Version */
}
ver = (major << 8) | minor;
addr = PTOV(paddr);
for (dmi = addr, i = 0; dmi < addr + length && i < count; i++)
dmi = smbios_parse_table(dmi, ver);
sprintf(buf, "%d.%d", major, minor);
setenv("smbios.version", buf, 1);
if (smbios_enabled_memory > 0 || smbios_old_enabled_memory > 0) {
sprintf(buf, "%u", smbios_enabled_memory > 0 ?
smbios_enabled_memory : smbios_old_enabled_memory);
setenv("smbios.memory.enabled", buf, 1);
}
if (smbios_enabled_sockets > 0) {
sprintf(buf, "%u", smbios_enabled_sockets);
setenv("smbios.socket.enabled", buf, 1);
}
if (smbios_populated_sockets > 0) {
sprintf(buf, "%u", smbios_populated_sockets);
setenv("smbios.socket.populated", buf, 1);
}
}