1148006Sjkim/*- 2190599Sjkim * Copyright (c) 2005-2009 Jung-uk Kim <jkim@FreeBSD.org> 3148006Sjkim * All rights reserved. 4148006Sjkim * 5148006Sjkim * Redistribution and use in source and binary forms, with or without 6148006Sjkim * modification, are permitted provided that the following conditions 7148006Sjkim * are met: 8148006Sjkim * 1. Redistributions of source code must retain the above copyright 9148006Sjkim * notice, this list of conditions and the following disclaimer. 10148006Sjkim * 2. Redistributions in binary form must reproduce the above copyright 11148006Sjkim * notice, this list of conditions and the following disclaimer in the 12148006Sjkim * documentation and/or other materials provided with the distribution. 13148006Sjkim * 14148006Sjkim * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15148006Sjkim * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16148006Sjkim * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17148006Sjkim * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18148006Sjkim * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19148006Sjkim * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20148006Sjkim * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21148006Sjkim * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22148006Sjkim * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23148006Sjkim * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24148006Sjkim * SUCH DAMAGE. 25148006Sjkim */ 26148006Sjkim 27148006Sjkim#include <sys/cdefs.h> 28148006Sjkim__FBSDID("$FreeBSD$"); 29148006Sjkim 30148006Sjkim#include <stand.h> 31148006Sjkim#include <bootstrap.h> 32190814Sjkim#include <sys/endian.h> 33148006Sjkim 34148006Sjkim#include "btxv86.h" 35156519Sjkim#include "libi386.h" 36148006Sjkim 37148006Sjkim/* 38148006Sjkim * Detect SMBIOS and export information about the SMBIOS into the 39148006Sjkim * environment. 40148006Sjkim * 41190814Sjkim * System Management BIOS Reference Specification, v2.6 Final 42190814Sjkim * http://www.dmtf.org/standards/published_documents/DSP0134_2.6.0.pdf 43148006Sjkim */ 44148006Sjkim 45148006Sjkim/* 46190814Sjkim * 2.1.1 SMBIOS Structure Table Entry Point 47148006Sjkim * 48190814Sjkim * "On non-EFI systems, the SMBIOS Entry Point structure, described below, can 49190814Sjkim * be located by application software by searching for the anchor-string on 50190814Sjkim * paragraph (16-byte) boundaries within the physical memory address range 51190814Sjkim * 000F0000h to 000FFFFFh. This entry point encapsulates an intermediate anchor 52190814Sjkim * string that is used by some existing DMI browsers." 53148006Sjkim */ 54148006Sjkim#define SMBIOS_START 0xf0000 55148006Sjkim#define SMBIOS_LENGTH 0x10000 56148006Sjkim#define SMBIOS_STEP 0x10 57148006Sjkim#define SMBIOS_SIG "_SM_" 58148006Sjkim#define SMBIOS_DMI_SIG "_DMI_" 59148006Sjkim 60190814Sjkim#define SMBIOS_GET8(base, off) (*(uint8_t *)((base) + (off))) 61190814Sjkim#define SMBIOS_GET16(base, off) (*(uint16_t *)((base) + (off))) 62190814Sjkim#define SMBIOS_GET32(base, off) (*(uint32_t *)((base) + (off))) 63190814Sjkim 64190814Sjkim#define SMBIOS_GETLEN(base) SMBIOS_GET8(base, 0x01) 65190814Sjkim#define SMBIOS_GETSTR(base) ((base) + SMBIOS_GETLEN(base)) 66190814Sjkim 67190599Sjkimstatic uint32_t smbios_enabled_memory = 0; 68190599Sjkimstatic uint32_t smbios_old_enabled_memory = 0; 69156519Sjkimstatic uint8_t smbios_enabled_sockets = 0; 70156519Sjkimstatic uint8_t smbios_populated_sockets = 0; 71151452Sjkim 72190814Sjkimstatic uint8_t 73190814Sjkimsmbios_checksum(const caddr_t addr, const uint8_t len) 74190814Sjkim{ 75190814Sjkim uint8_t sum; 76190814Sjkim int i; 77148006Sjkim 78190814Sjkim for (sum = 0, i = 0; i < len; i++) 79190814Sjkim sum += SMBIOS_GET8(addr, i); 80190814Sjkim return (sum); 81190814Sjkim} 82156519Sjkim 83190814Sjkimstatic caddr_t 84190814Sjkimsmbios_sigsearch(const caddr_t addr, const uint32_t len) 85148006Sjkim{ 86190814Sjkim caddr_t cp; 87148006Sjkim 88190814Sjkim /* Search on 16-byte boundaries. */ 89190814Sjkim for (cp = addr; cp < addr + len; cp += SMBIOS_STEP) 90190814Sjkim if (strncmp(cp, SMBIOS_SIG, 4) == 0 && 91190814Sjkim smbios_checksum(cp, SMBIOS_GET8(cp, 0x05)) == 0 && 92190814Sjkim strncmp(cp + 0x10, SMBIOS_DMI_SIG, 5) == 0 && 93190814Sjkim smbios_checksum(cp + 0x10, 0x0f) == 0) 94190814Sjkim return (cp); 95190814Sjkim return (NULL); 96190814Sjkim} 97148006Sjkim 98190814Sjkimstatic void 99190814Sjkimsmbios_setenv(const char *name, caddr_t addr, const int offset) 100190814Sjkim{ 101190814Sjkim caddr_t cp; 102190814Sjkim int i, idx; 103148006Sjkim 104190814Sjkim idx = SMBIOS_GET8(addr, offset); 105190814Sjkim if (idx != 0) { 106190814Sjkim cp = SMBIOS_GETSTR(addr); 107190814Sjkim for (i = 1; i < idx; i++) 108190814Sjkim cp += strlen(cp) + 1; 109190814Sjkim setenv(name, cp, 1); 110190599Sjkim } 111190814Sjkim} 112190814Sjkim 113190814Sjkim#ifdef SMBIOS_SERIAL_NUMBERS 114190814Sjkim 115190814Sjkim#define UUID_SIZE 16 116190814Sjkim#define UUID_TYPE uint32_t 117190814Sjkim#define UUID_STEP sizeof(UUID_TYPE) 118190814Sjkim#define UUID_ALL_BITS (UUID_SIZE / UUID_STEP) 119190814Sjkim#define UUID_GET(base, off) (*(UUID_TYPE *)((base) + (off))) 120190814Sjkim 121190814Sjkimstatic void 122190814Sjkimsmbios_setuuid(const char *name, const caddr_t addr, const int ver) 123190814Sjkim{ 124190814Sjkim char uuid[37]; 125190814Sjkim int i, ones, zeros; 126190814Sjkim UUID_TYPE n; 127190814Sjkim uint32_t f1; 128190814Sjkim uint16_t f2, f3; 129190814Sjkim 130190814Sjkim for (i = 0, ones = 0, zeros = 0; i < UUID_SIZE; i += UUID_STEP) { 131190814Sjkim n = UUID_GET(addr, i) + 1; 132190814Sjkim if (zeros == 0 && n == 0) 133190814Sjkim ones++; 134190814Sjkim else if (ones == 0 && n == 1) 135190814Sjkim zeros++; 136190814Sjkim else 137190814Sjkim break; 138190599Sjkim } 139190814Sjkim 140190814Sjkim if (ones != UUID_ALL_BITS && zeros != UUID_ALL_BITS) { 141190814Sjkim /* 142190814Sjkim * 3.3.2.1 System UUID 143190814Sjkim * 144190814Sjkim * "Although RFC 4122 recommends network byte order for all 145190814Sjkim * fields, the PC industry (including the ACPI, UEFI, and 146190814Sjkim * Microsoft specifications) has consistently used 147190814Sjkim * little-endian byte encoding for the first three fields: 148190814Sjkim * time_low, time_mid, time_hi_and_version. The same encoding, 149190814Sjkim * also known as wire format, should also be used for the 150190814Sjkim * SMBIOS representation of the UUID." 151190814Sjkim * 152190814Sjkim * Note: We use network byte order for backward compatibility 153190814Sjkim * unless SMBIOS version is 2.6+ or little-endian is forced. 154190814Sjkim */ 155190814Sjkim#ifndef SMBIOS_LITTLE_ENDIAN_UUID 156190814Sjkim if (ver < 0x0206) { 157190814Sjkim f1 = ntohl(SMBIOS_GET32(addr, 0)); 158190814Sjkim f2 = ntohs(SMBIOS_GET16(addr, 4)); 159190814Sjkim f3 = ntohs(SMBIOS_GET16(addr, 6)); 160190814Sjkim } else 161190814Sjkim#endif 162190814Sjkim { 163190814Sjkim f1 = le32toh(SMBIOS_GET32(addr, 0)); 164190814Sjkim f2 = le16toh(SMBIOS_GET16(addr, 4)); 165190814Sjkim f3 = le16toh(SMBIOS_GET16(addr, 6)); 166190814Sjkim } 167190814Sjkim sprintf(uuid, 168190814Sjkim "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x", 169190814Sjkim f1, f2, f3, SMBIOS_GET8(addr, 8), SMBIOS_GET8(addr, 9), 170190814Sjkim SMBIOS_GET8(addr, 10), SMBIOS_GET8(addr, 11), 171190814Sjkim SMBIOS_GET8(addr, 12), SMBIOS_GET8(addr, 13), 172190814Sjkim SMBIOS_GET8(addr, 14), SMBIOS_GET8(addr, 15)); 173190814Sjkim setenv(name, uuid, 1); 174190599Sjkim } 175148006Sjkim} 176148006Sjkim 177190814Sjkim#undef UUID_SIZE 178190814Sjkim#undef UUID_TYPE 179190814Sjkim#undef UUID_STEP 180190814Sjkim#undef UUID_ALL_BITS 181190814Sjkim#undef UUID_GET 182190814Sjkim 183190814Sjkim#endif 184190814Sjkim 185190814Sjkimstatic caddr_t 186190814Sjkimsmbios_parse_table(const caddr_t addr, const int ver) 187148006Sjkim{ 188190814Sjkim caddr_t cp; 189190814Sjkim int proc, size, osize, type; 190148006Sjkim 191190814Sjkim type = SMBIOS_GET8(addr, 0); /* 3.1.2 Structure Header Format */ 192190814Sjkim switch(type) { 193190814Sjkim case 0: /* 3.3.1 BIOS Information (Type 0) */ 194190814Sjkim smbios_setenv("smbios.bios.vendor", addr, 0x04); 195190814Sjkim smbios_setenv("smbios.bios.version", addr, 0x05); 196190814Sjkim smbios_setenv("smbios.bios.reldate", addr, 0x08); 197148006Sjkim break; 198148006Sjkim 199190814Sjkim case 1: /* 3.3.2 System Information (Type 1) */ 200190814Sjkim smbios_setenv("smbios.system.maker", addr, 0x04); 201190814Sjkim smbios_setenv("smbios.system.product", addr, 0x05); 202190814Sjkim smbios_setenv("smbios.system.version", addr, 0x06); 203156712Sjkim#ifdef SMBIOS_SERIAL_NUMBERS 204190814Sjkim smbios_setenv("smbios.system.serial", addr, 0x07); 205190814Sjkim smbios_setuuid("smbios.system.uuid", addr + 0x08, ver); 206156519Sjkim#endif 207148006Sjkim break; 208148006Sjkim 209190814Sjkim case 2: /* 3.3.3 Base Board (or Module) Information (Type 2) */ 210190814Sjkim smbios_setenv("smbios.planar.maker", addr, 0x04); 211190814Sjkim smbios_setenv("smbios.planar.product", addr, 0x05); 212190814Sjkim smbios_setenv("smbios.planar.version", addr, 0x06); 213156712Sjkim#ifdef SMBIOS_SERIAL_NUMBERS 214190814Sjkim smbios_setenv("smbios.planar.serial", addr, 0x07); 215156519Sjkim#endif 216148006Sjkim break; 217148006Sjkim 218190814Sjkim case 3: /* 3.3.4 System Enclosure or Chassis (Type 3) */ 219190814Sjkim smbios_setenv("smbios.chassis.maker", addr, 0x04); 220190814Sjkim smbios_setenv("smbios.chassis.version", addr, 0x06); 221156712Sjkim#ifdef SMBIOS_SERIAL_NUMBERS 222190814Sjkim smbios_setenv("smbios.chassis.serial", addr, 0x07); 223190814Sjkim smbios_setenv("smbios.chassis.tag", addr, 0x08); 224156519Sjkim#endif 225148006Sjkim break; 226148006Sjkim 227190814Sjkim case 4: /* 3.3.5 Processor Information (Type 4) */ 228151452Sjkim /* 229151452Sjkim * Offset 18h: Processor Status 230151452Sjkim * 231151452Sjkim * Bit 7 Reserved, must be 0 232151452Sjkim * Bit 6 CPU Socket Populated 233151452Sjkim * 1 - CPU Socket Populated 234151452Sjkim * 0 - CPU Socket Unpopulated 235151452Sjkim * Bit 5:3 Reserved, must be zero 236151452Sjkim * Bit 2:0 CPU Status 237151452Sjkim * 0h - Unknown 238151452Sjkim * 1h - CPU Enabled 239151452Sjkim * 2h - CPU Disabled by User via BIOS Setup 240151452Sjkim * 3h - CPU Disabled by BIOS (POST Error) 241151452Sjkim * 4h - CPU is Idle, waiting to be enabled 242151452Sjkim * 5-6h - Reserved 243151452Sjkim * 7h - Other 244151452Sjkim */ 245190814Sjkim proc = SMBIOS_GET8(addr, 0x18); 246190814Sjkim if ((proc & 0x07) == 1) 247151452Sjkim smbios_enabled_sockets++; 248190814Sjkim if ((proc & 0x40) != 0) 249151452Sjkim smbios_populated_sockets++; 250151452Sjkim break; 251151452Sjkim 252190814Sjkim case 6: /* 3.3.7 Memory Module Information (Type 6, Obsolete) */ 253190599Sjkim /* 254190599Sjkim * Offset 0Ah: Enabled Size 255190599Sjkim * 256190599Sjkim * Bit 7 Bank connection 257190599Sjkim * 1 - Double-bank connection 258190599Sjkim * 0 - Single-bank connection 259190599Sjkim * Bit 6:0 Size (n), where 2**n is the size in MB 260190599Sjkim * 7Dh - Not determinable (Installed Size only) 261190599Sjkim * 7Eh - Module is installed, but no memory 262190599Sjkim * has been enabled 263190599Sjkim * 7Fh - Not installed 264190599Sjkim */ 265190814Sjkim osize = SMBIOS_GET8(addr, 0x0a) & 0x7f; 266190599Sjkim if (osize > 0 && osize < 22) 267190814Sjkim smbios_old_enabled_memory += 1 << (osize + 10); 268190599Sjkim break; 269190599Sjkim 270190814Sjkim case 17: /* 3.3.18 Memory Device (Type 17) */ 271190599Sjkim /* 272190599Sjkim * Offset 0Ch: Size 273190599Sjkim * 274190599Sjkim * Bit 15 Granularity 275190599Sjkim * 1 - Value is in kilobytes units 276190599Sjkim * 0 - Value is in megabytes units 277190599Sjkim * Bit 14:0 Size 278190599Sjkim */ 279190814Sjkim size = SMBIOS_GET16(addr, 0x0c); 280190599Sjkim if (size != 0 && size != 0xffff) 281190599Sjkim smbios_enabled_memory += (size & 0x8000) != 0 ? 282190814Sjkim (size & 0x7fff) : (size << 10); 283190599Sjkim break; 284190599Sjkim 285190814Sjkim default: /* skip other types */ 286148006Sjkim break; 287148006Sjkim } 288190599Sjkim 289190814Sjkim /* Find structure terminator. */ 290190814Sjkim cp = SMBIOS_GETSTR(addr); 291190814Sjkim while (SMBIOS_GET16(cp, 0) != 0) 292190814Sjkim cp++; 293148006Sjkim 294190814Sjkim return (cp + 2); 295148006Sjkim} 296148006Sjkim 297190814Sjkimvoid 298190814Sjkimsmbios_detect(void) 299148006Sjkim{ 300190814Sjkim char buf[16]; 301190814Sjkim caddr_t addr, dmi, smbios; 302190814Sjkim size_t count, length; 303190814Sjkim uint32_t paddr; 304190814Sjkim int i, major, minor, ver; 305148006Sjkim 306190814Sjkim /* Search signatures and validate checksums. */ 307190814Sjkim smbios = smbios_sigsearch(PTOV(SMBIOS_START), SMBIOS_LENGTH); 308190814Sjkim if (smbios == NULL) 309148006Sjkim return; 310148006Sjkim 311190814Sjkim length = SMBIOS_GET16(smbios, 0x16); /* Structure Table Length */ 312190814Sjkim paddr = SMBIOS_GET32(smbios, 0x18); /* Structure Table Address */ 313190814Sjkim count = SMBIOS_GET16(smbios, 0x1c); /* No of SMBIOS Structures */ 314190814Sjkim ver = SMBIOS_GET8(smbios, 0x1e); /* SMBIOS BCD Revision */ 315148006Sjkim 316190814Sjkim if (ver != 0) { 317190814Sjkim major = ver >> 4; 318190814Sjkim minor = ver & 0x0f; 319190814Sjkim if (major > 9 || minor > 9) 320190814Sjkim ver = 0; 321148006Sjkim } 322190814Sjkim if (ver == 0) { 323190814Sjkim major = SMBIOS_GET8(smbios, 0x06); /* SMBIOS Major Version */ 324190814Sjkim minor = SMBIOS_GET8(smbios, 0x07); /* SMBIOS Minor Version */ 325190814Sjkim } 326190814Sjkim ver = (major << 8) | minor; 327148006Sjkim 328190814Sjkim addr = PTOV(paddr); 329190814Sjkim for (dmi = addr, i = 0; dmi < addr + length && i < count; i++) 330190814Sjkim dmi = smbios_parse_table(dmi, ver); 331156519Sjkim 332190814Sjkim sprintf(buf, "%d.%d", major, minor); 333190814Sjkim setenv("smbios.version", buf, 1); 334190814Sjkim if (smbios_enabled_memory > 0 || smbios_old_enabled_memory > 0) { 335190814Sjkim sprintf(buf, "%u", smbios_enabled_memory > 0 ? 336190814Sjkim smbios_enabled_memory : smbios_old_enabled_memory); 337190814Sjkim setenv("smbios.memory.enabled", buf, 1); 338156519Sjkim } 339190814Sjkim if (smbios_enabled_sockets > 0) { 340190814Sjkim sprintf(buf, "%u", smbios_enabled_sockets); 341190814Sjkim setenv("smbios.socket.enabled", buf, 1); 342156519Sjkim } 343190814Sjkim if (smbios_populated_sockets > 0) { 344190814Sjkim sprintf(buf, "%u", smbios_populated_sockets); 345190814Sjkim setenv("smbios.socket.populated", buf, 1); 346190814Sjkim } 347156519Sjkim} 348