1 /*- 2 * Copyright (c) 2005-2009 Jung-uk Kim <jkim@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <stand.h> 31 #include <bootstrap.h> 32 #include <sys/endian.h> 33 34 #ifdef EFI 35 /* In EFI, we don't need PTOV(). */ 36 #define PTOV(x) (caddr_t)(x) 37 #else 38 #include "btxv86.h" 39 #endif 40 #include "smbios.h" 41 42 /* 43 * Detect SMBIOS and export information about the SMBIOS into the 44 * environment. 45 * 46 * System Management BIOS Reference Specification, v2.6 Final 47 * http://www.dmtf.org/standards/published_documents/DSP0134_2.6.0.pdf 48 * System Management BIOS (SMBIOS) Reference Specification, v3.1.0 49 * http://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.1.0.pdf 50 */ 51 52 /* 53 * 2.1.1 SMBIOS Structure Table Entry Point 54 * 55 * "On non-EFI systems, the SMBIOS Entry Point structure, described below, can 56 * be located by application software by searching for the anchor-string on 57 * paragraph (16-byte) boundaries within the physical memory address range 58 * 000F0000h to 000FFFFFh. This entry point encapsulates an intermediate anchor 59 * string that is used by some existing DMI browsers." 60 */ 61 #define SMBIOS_START 0xf0000 62 #define SMBIOS_LENGTH 0x10000 63 #define SMBIOS_STEP 0x10 64 #define SMBIOS_SIG "_SM_" 65 #define SMBIOS_SIG_LEN (4) 66 #define SMBIOS3_SIG "_SM3_" 67 #define SMBIOS3_SIG_LEN (5) 68 #define SMBIOS_DMI_SIG "_DMI_" 69 #define SMBIOS_DMI_SIG_LEN (5) 70 71 #define SMBIOS_GET8(base, off) (*(uint8_t *)((base) + (off))) 72 #define SMBIOS_GET16(base, off) (*(uint16_t *)((base) + (off))) 73 #define SMBIOS_GET32(base, off) (*(uint32_t *)((base) + (off))) 74 #define SMBIOS_GET64(base, off) (*(uint64_t *)((base) + (off))) 75 76 #define SMBIOS_GETLEN(base) SMBIOS_GET8(base, 0x01) 77 #define SMBIOS_GETSTR(base) ((base) + SMBIOS_GETLEN(base)) 78 79 struct smbios_attr { 80 int probed; 81 caddr_t addr; 82 size_t length; 83 size_t count; 84 int major; 85 int minor; 86 int ver; 87 const char* bios_vendor; 88 const char* maker; 89 const char* product; 90 uint32_t enabled_memory; 91 uint32_t old_enabled_memory; 92 uint8_t enabled_sockets; 93 uint8_t populated_sockets; 94 }; 95 96 static struct smbios_attr smbios; 97 98 static uint8_t 99 smbios_checksum(const caddr_t addr, const uint8_t len) 100 { 101 uint8_t sum; 102 int i; 103 104 for (sum = 0, i = 0; i < len; i++) 105 sum += SMBIOS_GET8(addr, i); 106 return (sum); 107 } 108 109 static caddr_t 110 smbios_sigsearch(const caddr_t addr, const uint32_t len) 111 { 112 caddr_t cp; 113 uintptr_t paddr; 114 115 /* Search on 16-byte boundaries. */ 116 for (cp = addr; cp < addr + len; cp += SMBIOS_STEP) { 117 if (strncmp(cp, SMBIOS_SIG, SMBIOS_SIG_LEN) == 0 && 118 smbios_checksum(cp, SMBIOS_GET8(cp, 0x05)) == 0 && 119 strncmp(cp + 0x10, SMBIOS_DMI_SIG, SMBIOS_DMI_SIG_LEN) == 0 120 && smbios_checksum(cp + 0x10, 0x0f) == 0) { 121 122 /* Structure Table Length */ 123 smbios.length = SMBIOS_GET16(cp, 0x16); 124 /* Structure Table Address */ 125 paddr = SMBIOS_GET32(cp, 0x18); 126 /* No of SMBIOS Structures */ 127 smbios.count = SMBIOS_GET16(cp, 0x1c); 128 /* SMBIOS BCD Revision */ 129 smbios.ver = SMBIOS_GET8(cp, 0x1e); 130 if (smbios.ver != 0) { 131 smbios.major = smbios.ver >> 4; 132 smbios.minor = smbios.ver & 0x0f; 133 if (smbios.major > 9 || smbios.minor > 9) 134 smbios.ver = 0; 135 } 136 if (smbios.ver == 0) { 137 /* SMBIOS Major Version */ 138 smbios.major = SMBIOS_GET8(cp, 0x06); 139 /* SMBIOS Minor Version */ 140 smbios.minor = SMBIOS_GET8(cp, 0x07); 141 } 142 smbios.ver = (smbios.major << 8) | smbios.minor; 143 smbios.addr = PTOV(paddr); 144 return (cp); 145 } 146 #ifdef _LP64 147 /* 148 * Check for the SMBIOS 64-bit entry point introduced in 149 * version 3.0. 150 * 151 * The table address is a 64-bit physical address that may 152 * appear at any 64-bit address. We only search for 153 * the 64-bit entry point when running a 64-bit application. 154 */ 155 if (strncmp(cp, SMBIOS3_SIG, SMBIOS3_SIG_LEN) == 0 && 156 smbios_checksum(cp, SMBIOS_GET8(cp, 0x06)) == 0) { 157 158 /* SMBIOS Major Version */ 159 smbios.major = SMBIOS_GET8(cp, 0x07); 160 /* SMBIOS Minor Version */ 161 smbios.minor = SMBIOS_GET8(cp, 0x08); 162 /* Entry Point Revision */ 163 smbios.ver = SMBIOS_GET8(cp, 0x0a); 164 /* Structure Table maximum size */ 165 smbios.length = SMBIOS_GET32(cp, 0x0c); 166 /* Structure Table Address */ 167 paddr = SMBIOS_GET64(cp, 0x10); 168 smbios.addr = PTOV(paddr); 169 /* 170 * Calculate upper limit for structure count, 171 * use size of table header (4 bytes). 172 */ 173 smbios.count = smbios.length / 4; 174 return (cp); 175 } 176 #endif 177 } 178 return (NULL); 179 } 180 181 static const char* 182 smbios_getstring(caddr_t addr, const int offset) 183 { 184 caddr_t cp; 185 int i, idx; 186 187 idx = SMBIOS_GET8(addr, offset); 188 if (idx != 0) { 189 cp = SMBIOS_GETSTR(addr); 190 for (i = 1; i < idx; i++) 191 cp += strlen(cp) + 1; 192 return cp; 193 } 194 return (NULL); 195 } 196 197 static void 198 smbios_setenv(const char *name, caddr_t addr, const int offset) 199 { 200 const char* val; 201 202 val = smbios_getstring(addr, offset); 203 if (val != NULL) 204 setenv(name, val, 1); 205 } 206 207 #ifdef SMBIOS_SERIAL_NUMBERS 208 209 #define UUID_SIZE 16 210 #define UUID_TYPE uint32_t 211 #define UUID_STEP sizeof(UUID_TYPE) 212 #define UUID_ALL_BITS (UUID_SIZE / UUID_STEP) 213 #define UUID_GET(base, off) (*(UUID_TYPE *)((base) + (off))) 214 215 static void 216 smbios_setuuid(const char *name, const caddr_t addr, const int ver) 217 { 218 char uuid[37]; 219 int byteorder, i, ones, zeros; 220 UUID_TYPE n; 221 uint32_t f1; 222 uint16_t f2, f3; 223 224 for (i = 0, ones = 0, zeros = 0; i < UUID_SIZE; i += UUID_STEP) { 225 n = UUID_GET(addr, i) + 1; 226 if (zeros == 0 && n == 0) 227 ones++; 228 else if (ones == 0 && n == 1) 229 zeros++; 230 else 231 break; 232 } 233 234 if (ones != UUID_ALL_BITS && zeros != UUID_ALL_BITS) { 235 /* 236 * 3.3.2.1 System UUID 237 * 238 * "Although RFC 4122 recommends network byte order for all 239 * fields, the PC industry (including the ACPI, UEFI, and 240 * Microsoft specifications) has consistently used 241 * little-endian byte encoding for the first three fields: 242 * time_low, time_mid, time_hi_and_version. The same encoding, 243 * also known as wire format, should also be used for the 244 * SMBIOS representation of the UUID." 245 * 246 * Note: We use network byte order for backward compatibility 247 * unless SMBIOS version is 2.6+ or little-endian is forced. 248 */ 249 #if defined(SMBIOS_LITTLE_ENDIAN_UUID) 250 byteorder = LITTLE_ENDIAN; 251 #elif defined(SMBIOS_NETWORK_ENDIAN_UUID) 252 byteorder = BIG_ENDIAN; 253 #else 254 byteorder = ver < 0x0206 ? BIG_ENDIAN : LITTLE_ENDIAN; 255 #endif 256 if (byteorder != LITTLE_ENDIAN) { 257 f1 = ntohl(SMBIOS_GET32(addr, 0)); 258 f2 = ntohs(SMBIOS_GET16(addr, 4)); 259 f3 = ntohs(SMBIOS_GET16(addr, 6)); 260 } else { 261 f1 = le32toh(SMBIOS_GET32(addr, 0)); 262 f2 = le16toh(SMBIOS_GET16(addr, 4)); 263 f3 = le16toh(SMBIOS_GET16(addr, 6)); 264 } 265 sprintf(uuid, 266 "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x", 267 f1, f2, f3, SMBIOS_GET8(addr, 8), SMBIOS_GET8(addr, 9), 268 SMBIOS_GET8(addr, 10), SMBIOS_GET8(addr, 11), 269 SMBIOS_GET8(addr, 12), SMBIOS_GET8(addr, 13), 270 SMBIOS_GET8(addr, 14), SMBIOS_GET8(addr, 15)); 271 setenv(name, uuid, 1); 272 } 273 } 274 275 #undef UUID_SIZE 276 #undef UUID_TYPE 277 #undef UUID_STEP 278 #undef UUID_ALL_BITS 279 #undef UUID_GET 280 281 #endif 282 283 static caddr_t 284 smbios_parse_table(const caddr_t addr) 285 { 286 caddr_t cp; 287 int proc, size, osize, type; 288 289 type = SMBIOS_GET8(addr, 0); /* 3.1.2 Structure Header Format */ 290 switch(type) { 291 case 0: /* 3.3.1 BIOS Information (Type 0) */ 292 smbios_setenv("smbios.bios.vendor", addr, 0x04); 293 smbios_setenv("smbios.bios.version", addr, 0x05); 294 smbios_setenv("smbios.bios.reldate", addr, 0x08); 295 break; 296 297 case 1: /* 3.3.2 System Information (Type 1) */ 298 smbios_setenv("smbios.system.maker", addr, 0x04); 299 smbios_setenv("smbios.system.product", addr, 0x05); 300 smbios_setenv("smbios.system.version", addr, 0x06); 301 #ifdef SMBIOS_SERIAL_NUMBERS 302 smbios_setenv("smbios.system.serial", addr, 0x07); 303 smbios_setuuid("smbios.system.uuid", addr + 0x08, smbios.ver); 304 #endif 305 if (smbios.major > 2 || 306 (smbios.major == 2 && smbios.minor >= 4)) { 307 smbios_setenv("smbios.system.sku", addr, 0x19); 308 smbios_setenv("smbios.system.family", addr, 0x1a); 309 } 310 break; 311 312 case 2: /* 3.3.3 Base Board (or Module) Information (Type 2) */ 313 smbios_setenv("smbios.planar.maker", addr, 0x04); 314 smbios_setenv("smbios.planar.product", addr, 0x05); 315 smbios_setenv("smbios.planar.version", addr, 0x06); 316 #ifdef SMBIOS_SERIAL_NUMBERS 317 smbios_setenv("smbios.planar.serial", addr, 0x07); 318 smbios_setenv("smbios.planar.tag", addr, 0x08); 319 #endif 320 smbios_setenv("smbios.planar.location", addr, 0x0a); 321 break; 322 323 case 3: /* 3.3.4 System Enclosure or Chassis (Type 3) */ 324 smbios_setenv("smbios.chassis.maker", addr, 0x04); 325 smbios_setenv("smbios.chassis.version", addr, 0x06); 326 #ifdef SMBIOS_SERIAL_NUMBERS 327 smbios_setenv("smbios.chassis.serial", addr, 0x07); 328 smbios_setenv("smbios.chassis.tag", addr, 0x08); 329 #endif 330 break; 331 332 case 4: /* 3.3.5 Processor Information (Type 4) */ 333 /* 334 * Offset 18h: Processor Status 335 * 336 * Bit 7 Reserved, must be 0 337 * Bit 6 CPU Socket Populated 338 * 1 - CPU Socket Populated 339 * 0 - CPU Socket Unpopulated 340 * Bit 5:3 Reserved, must be zero 341 * Bit 2:0 CPU Status 342 * 0h - Unknown 343 * 1h - CPU Enabled 344 * 2h - CPU Disabled by User via BIOS Setup 345 * 3h - CPU Disabled by BIOS (POST Error) 346 * 4h - CPU is Idle, waiting to be enabled 347 * 5-6h - Reserved 348 * 7h - Other 349 */ 350 proc = SMBIOS_GET8(addr, 0x18); 351 if ((proc & 0x07) == 1) 352 smbios.enabled_sockets++; 353 if ((proc & 0x40) != 0) 354 smbios.populated_sockets++; 355 break; 356 357 case 6: /* 3.3.7 Memory Module Information (Type 6, Obsolete) */ 358 /* 359 * Offset 0Ah: Enabled Size 360 * 361 * Bit 7 Bank connection 362 * 1 - Double-bank connection 363 * 0 - Single-bank connection 364 * Bit 6:0 Size (n), where 2**n is the size in MB 365 * 7Dh - Not determinable (Installed Size only) 366 * 7Eh - Module is installed, but no memory 367 * has been enabled 368 * 7Fh - Not installed 369 */ 370 osize = SMBIOS_GET8(addr, 0x0a) & 0x7f; 371 if (osize > 0 && osize < 22) 372 smbios.old_enabled_memory += 1 << (osize + 10); 373 break; 374 375 case 17: /* 3.3.18 Memory Device (Type 17) */ 376 /* 377 * Offset 0Ch: Size 378 * 379 * Bit 15 Granularity 380 * 1 - Value is in kilobytes units 381 * 0 - Value is in megabytes units 382 * Bit 14:0 Size 383 */ 384 size = SMBIOS_GET16(addr, 0x0c); 385 if (size != 0 && size != 0xffff) 386 smbios.enabled_memory += (size & 0x8000) != 0 ? 387 (size & 0x7fff) : (size << 10); 388 break; 389 390 default: /* skip other types */ 391 break; 392 } 393 394 /* Find structure terminator. */ 395 cp = SMBIOS_GETSTR(addr); 396 while (SMBIOS_GET16(cp, 0) != 0) 397 cp++; 398 399 return (cp + 2); 400 } 401 402 static caddr_t 403 smbios_find_struct(int type) 404 { 405 caddr_t dmi; 406 size_t i; 407 408 if (smbios.addr == NULL) 409 return (NULL); 410 411 for (dmi = smbios.addr, i = 0; 412 dmi < smbios.addr + smbios.length && i < smbios.count; i++) { 413 if (SMBIOS_GET8(dmi, 0) == type) 414 return dmi; 415 /* Find structure terminator. */ 416 dmi = SMBIOS_GETSTR(dmi); 417 while (SMBIOS_GET16(dmi, 0) != 0) 418 dmi++; 419 dmi += 2; 420 } 421 422 return (NULL); 423 } 424 425 static void 426 smbios_probe(const caddr_t addr) 427 { 428 caddr_t info; 429 const caddr_t paddr = addr != NULL ? addr : PTOV(SMBIOS_START); 430 431 if (smbios.probed) 432 return; 433 smbios.probed = 1; 434 435 /* Search signatures and validate checksums. */ 436 if (smbios_sigsearch(paddr, SMBIOS_LENGTH) == NULL) 437 return; 438 439 /* Get system information from SMBIOS */ 440 info = smbios_find_struct(0x00); 441 if (info != NULL) { 442 smbios.bios_vendor = smbios_getstring(info, 0x04); 443 } 444 info = smbios_find_struct(0x01); 445 if (info != NULL) { 446 smbios.maker = smbios_getstring(info, 0x04); 447 smbios.product = smbios_getstring(info, 0x05); 448 } 449 } 450 451 void 452 smbios_detect(const caddr_t addr) 453 { 454 char buf[16]; 455 caddr_t dmi; 456 size_t i; 457 458 smbios_probe(addr); 459 if (smbios.addr == NULL) 460 return; 461 462 for (dmi = smbios.addr, i = 0; 463 dmi < smbios.addr + smbios.length && i < smbios.count; i++) 464 dmi = smbios_parse_table(dmi); 465 466 sprintf(buf, "%d.%d", smbios.major, smbios.minor); 467 setenv("smbios.version", buf, 1); 468 if (smbios.enabled_memory > 0 || smbios.old_enabled_memory > 0) { 469 sprintf(buf, "%u", smbios.enabled_memory > 0 ? 470 smbios.enabled_memory : smbios.old_enabled_memory); 471 setenv("smbios.memory.enabled", buf, 1); 472 } 473 if (smbios.enabled_sockets > 0) { 474 sprintf(buf, "%u", smbios.enabled_sockets); 475 setenv("smbios.socket.enabled", buf, 1); 476 } 477 if (smbios.populated_sockets > 0) { 478 sprintf(buf, "%u", smbios.populated_sockets); 479 setenv("smbios.socket.populated", buf, 1); 480 } 481 } 482 483 static int 484 smbios_match_str(const char* s1, const char* s2) 485 { 486 return (s1 == NULL || (s2 != NULL && !strcmp(s1, s2))); 487 } 488 489 int 490 smbios_match(const char* bios_vendor, const char* maker, 491 const char* product) 492 { 493 /* XXXRP currently, only called from non-EFI. */ 494 smbios_probe(NULL); 495 return (smbios_match_str(bios_vendor, smbios.bios_vendor) && 496 smbios_match_str(maker, smbios.maker) && 497 smbios_match_str(product, smbios.product)); 498 } 499