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 <stand.h> 28 #include <sys/endian.h> 29 30 #define PTOV(x) ptov(x) 31 32 /* 33 * Detect SMBIOS and export information about the SMBIOS into the 34 * environment. 35 * 36 * System Management BIOS Reference Specification, v2.6 Final 37 * http://www.dmtf.org/standards/published_documents/DSP0134_2.6.0.pdf 38 * 39 * System Management BIOS (SMBIOS) Reference Specification, 3.6.0 40 * https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.6.0.pdf 41 */ 42 43 /* 44 * The first quoted paragraph below can also be found in section 2.1.1 SMBIOS 45 * Structure Table Entry Point of System Management BIOS Reference 46 * Specification, v2.6 Final 47 * 48 * (From System Management BIOS (SMBIOS) Reference Specification, 3.6.0) 49 * 5.2.1 SMBIOS 2.1 (32-bit) Entry Point 50 * 51 * "On non-UEFI systems, the 32-bit SMBIOS Entry Point structure, can be 52 * located by application software by searching for the anchor-string on 53 * paragraph (16-byte) boundaries within the physical memory address 54 * range 000F0000h to 000FFFFFh. This entry point encapsulates an intermediate 55 * anchor string that is used by some existing DMI browsers. 56 * 57 * On UEFI-based systems, the SMBIOS Entry Point structure can be located by 58 * looking in the EFI Configuration Table for the SMBIOS GUID 59 * (SMBIOS_TABLE_GUID, {EB9D2D31-2D88-11D3-9A16-0090273FC14D}) and using the 60 * associated pointer. See section 4.6 of the UEFI Specification for details. 61 * See section 2.3 of the UEFI Specification for how to report the containing 62 * memory type. 63 * 64 * NOTE While the SMBIOS Major and Minor Versions (offsets 06h and 07h) 65 * currently duplicate the information that is present in the SMBIOS BCD 66 * Revision (offset 1Eh), they provide a path for future growth in this 67 * specification. The BCD Revision, for example, provides only a single digit 68 * for each of the major and minor version numbers." 69 * 70 * 5.2.2 SMBIOS 860 3.0 (64-bit) Entry Point 71 * 72 * "On non-UEFI systems, the 64-bit SMBIOS Entry Point structure can be located 73 * by application software by searching for the anchor-string on paragraph 74 * (16-byte) boundaries within the physical memory address range 000F0000h to 75 * 000FFFFFh. 76 * 77 * On UEFI-based systems, the SMBIOS Entry Point structure can be located by 78 * looking in the EFI Configuration Table for the SMBIOS 3.x GUID 79 * (SMBIOS3_TABLE_GUID, {F2FD1544-9794-4A2C-992E-E5BBCF20E394}) and using the 80 * associated pointer. See section 4.6 of the UEFI Specification for details. 81 * See section 2.3 of the UEFI Specification for how to report the containing 82 * memory type." 83 */ 84 #define SMBIOS_START 0xf0000 85 #define SMBIOS_LENGTH 0x10000 86 #define SMBIOS_STEP 0x10 87 #define SMBIOS_SIG "_SM_" 88 #define SMBIOS3_SIG "_SM3_" 89 #define SMBIOS_DMI_SIG "_DMI_" 90 #define SMBIOS_EOT_TYPE 0x7f 91 92 /* 93 * 5.1 General 94 *... 95 * NOTE The Entry Point Structure and all SMBIOS structures assume a 96 * little-endian ordering convention... 97 * ... 98 * 99 * We use memcpy to avoid unaligned access to memory. To normal memory, this is 100 * fine, but the memory we are using might be mmap'd /dev/mem which under Linux 101 * on aarch64 doesn't allow unaligned access. leXdec and friends can't be used 102 * because those can optimize to an unaligned load (which often is fine, but not 103 * for mmap'd /dev/mem which has special memory attributes). 104 */ 105 static inline uint8_t 106 SMBIOS_GET8(const caddr_t base, int off) 107 { 108 return (base[off]); 109 } 110 111 static inline uint16_t 112 SMBIOS_GET16(const caddr_t base, int off) 113 { 114 uint16_t v; 115 116 memcpy(&v, base + off, sizeof(v)); 117 return (le16toh(v)); 118 } 119 120 static inline uint32_t 121 SMBIOS_GET32(const caddr_t base, int off) 122 { 123 uint32_t v; 124 125 memcpy(&v, base + off, sizeof(v)); 126 return (le32toh(v)); 127 } 128 129 static inline uint64_t 130 SMBIOS_GET64(const caddr_t base, int off) 131 { 132 uint64_t v; 133 134 memcpy(&v, base + off, sizeof(v)); 135 return (le64toh(v)); 136 } 137 138 #define SMBIOS_GETLEN(base) SMBIOS_GET8(base, 0x01) 139 #define SMBIOS_GETSTR(base) ((base) + SMBIOS_GETLEN(base)) 140 141 struct smbios_attr { 142 int is_64bit_ep; 143 caddr_t addr; 144 size_t length; 145 size_t count; 146 int major; 147 int minor; 148 int ver; 149 const char* bios_vendor; 150 const char* maker; 151 const char* product; 152 uint32_t enabled_memory; 153 uint32_t old_enabled_memory; 154 uint8_t enabled_sockets; 155 uint8_t populated_sockets; 156 }; 157 158 static struct smbios_attr smbios; 159 160 static uint8_t 161 smbios_checksum(const caddr_t addr, const uint8_t len) 162 { 163 uint8_t sum; 164 int i; 165 166 for (sum = 0, i = 0; i < len; i++) 167 sum += SMBIOS_GET8(addr, i); 168 return (sum); 169 } 170 171 static caddr_t 172 smbios_sigsearch(const caddr_t addr, const uint32_t len) 173 { 174 caddr_t cp; 175 caddr_t v2_p = NULL; 176 177 /* Search on 16-byte boundaries. */ 178 for (cp = addr; cp < addr + len; cp += SMBIOS_STEP) { 179 /* v3.0, 64-bit Entry point */ 180 if (strncmp(cp, SMBIOS3_SIG, sizeof(SMBIOS3_SIG) - 1) == 0 && 181 /* 182 * The specification only guarantees the presence of the 183 * Structure Table Maximum Size and Address Entry fields at 184 * offsets 0x0c and 0x10 if the Entry Point Revision is not 185 * 0. 186 */ 187 SMBIOS_GET8(cp, 0x0a) != 0 && 188 smbios_checksum(cp, SMBIOS_GET8(cp, 0x06)) == 0) { 189 #ifdef __ILP32__ 190 uint64_t end_addr; 191 192 end_addr = SMBIOS_GET64(cp, 0x10) + /* Start address. */ 193 SMBIOS_GET32(cp, 0x0c); /* Maximum size. */ 194 /* Is the table (or part of it) located above 4G? */ 195 if (end_addr >= (uint64_t)1 << 32) 196 /* Can't access it with 32-bit addressing. */ 197 continue; 198 #endif 199 smbios.is_64bit_ep = 1; 200 return (cp); 201 } 202 203 /* v2.1, 32-bit Entry point */ 204 if (strncmp(cp, SMBIOS_SIG, sizeof(SMBIOS_SIG) - 1) == 0 && 205 smbios_checksum(cp, SMBIOS_GET8(cp, 0x05)) == 0 && 206 strncmp(cp + 0x10, SMBIOS_DMI_SIG, 5) == 0 && 207 smbios_checksum(cp + 0x10, 0x0f) == 0) { 208 /* 209 * Note that we saw this entry point, but don't return 210 * it right now as we favor the 64-bit one if present. 211 */ 212 v2_p = cp; 213 } 214 } 215 return (v2_p); 216 } 217 218 static const char* 219 smbios_getstring(caddr_t addr, const int offset) 220 { 221 caddr_t cp; 222 int i, idx; 223 224 idx = SMBIOS_GET8(addr, offset); 225 if (idx != 0) { 226 cp = SMBIOS_GETSTR(addr); 227 for (i = 1; i < idx; i++) 228 cp += strlen(cp) + 1; 229 return cp; 230 } 231 return (NULL); 232 } 233 234 static void 235 smbios_setenv(const char *name, caddr_t addr, const int offset) 236 { 237 const char* val; 238 239 val = smbios_getstring(addr, offset); 240 if (val != NULL) 241 setenv(name, val, 1); 242 } 243 244 #ifdef SMBIOS_SERIAL_NUMBERS 245 246 #define UUID_SIZE 16 247 #define UUID_TYPE uint32_t 248 #define UUID_STEP sizeof(UUID_TYPE) 249 #define UUID_ALL_BITS (UUID_SIZE / UUID_STEP) 250 #define UUID_GET(base, off) SMBIOS_GET32(base, off) 251 252 static void 253 smbios_setuuid(const char *name, const caddr_t addr, const int ver __unused) 254 { 255 char uuid[37]; 256 int byteorder, i, ones, zeros; 257 UUID_TYPE n; 258 uint32_t f1; 259 uint16_t f2, f3; 260 261 for (i = 0, ones = 0, zeros = 0; i < UUID_SIZE; i += UUID_STEP) { 262 n = UUID_GET(addr, i) + 1; 263 if (zeros == 0 && n == 0) 264 ones++; 265 else if (ones == 0 && n == 1) 266 zeros++; 267 else 268 break; 269 } 270 271 if (ones != UUID_ALL_BITS && zeros != UUID_ALL_BITS) { 272 /* 273 * 3.3.2.1 System UUID 274 * 275 * "Although RFC 4122 recommends network byte order for all 276 * fields, the PC industry (including the ACPI, UEFI, and 277 * Microsoft specifications) has consistently used 278 * little-endian byte encoding for the first three fields: 279 * time_low, time_mid, time_hi_and_version. The same encoding, 280 * also known as wire format, should also be used for the 281 * SMBIOS representation of the UUID." 282 * 283 * Note: We use network byte order for backward compatibility 284 * unless SMBIOS version is 2.6+ or little-endian is forced. 285 */ 286 #if defined(SMBIOS_LITTLE_ENDIAN_UUID) 287 byteorder = LITTLE_ENDIAN; 288 #elif defined(SMBIOS_NETWORK_ENDIAN_UUID) 289 byteorder = BIG_ENDIAN; 290 #else 291 byteorder = ver < 0x0206 ? BIG_ENDIAN : LITTLE_ENDIAN; 292 #endif 293 if (byteorder != LITTLE_ENDIAN) { 294 f1 = ntohl(SMBIOS_GET32(addr, 0)); 295 f2 = ntohs(SMBIOS_GET16(addr, 4)); 296 f3 = ntohs(SMBIOS_GET16(addr, 6)); 297 } else { 298 f1 = le32toh(SMBIOS_GET32(addr, 0)); 299 f2 = le16toh(SMBIOS_GET16(addr, 4)); 300 f3 = le16toh(SMBIOS_GET16(addr, 6)); 301 } 302 sprintf(uuid, 303 "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x", 304 f1, f2, f3, SMBIOS_GET8(addr, 8), SMBIOS_GET8(addr, 9), 305 SMBIOS_GET8(addr, 10), SMBIOS_GET8(addr, 11), 306 SMBIOS_GET8(addr, 12), SMBIOS_GET8(addr, 13), 307 SMBIOS_GET8(addr, 14), SMBIOS_GET8(addr, 15)); 308 setenv(name, uuid, 1); 309 } 310 } 311 312 #undef UUID_SIZE 313 #undef UUID_TYPE 314 #undef UUID_STEP 315 #undef UUID_ALL_BITS 316 #undef UUID_GET 317 318 #endif 319 320 static const char * 321 smbios_parse_chassis_type(caddr_t addr) 322 { 323 int type; 324 325 type = SMBIOS_GET8(addr, 0x5); 326 switch (type) { 327 case 0x1: 328 return ("Other"); 329 case 0x2: 330 return ("Unknown"); 331 case 0x3: 332 return ("Desktop"); 333 case 0x4: 334 return ("Low Profile Desktop"); 335 case 0x5: 336 return ("Pizza Box"); 337 case 0x6: 338 return ("Mini Tower"); 339 case 0x7: 340 return ("Tower"); 341 case 0x8: 342 return ("Portable"); 343 case 0x9: 344 return ("Laptop"); 345 case 0xA: 346 return ("Notebook"); 347 case 0xB: 348 return ("Hand Held"); 349 case 0xC: 350 return ("Docking Station"); 351 case 0xD: 352 return ("All in One"); 353 case 0xE: 354 return ("Sub Notebook"); 355 case 0xF: 356 return ("Lunch Box"); 357 case 0x10: 358 return ("Space-saving"); 359 case 0x11: 360 return ("Main Server Chassis"); 361 case 0x12: 362 return ("Expansion Chassis"); 363 case 0x13: 364 return ("SubChassis"); 365 case 0x14: 366 return ("Bus Expansion Chassis"); 367 case 0x15: 368 return ("Peripheral Chassis"); 369 case 0x16: 370 return ("RAID Chassis"); 371 case 0x17: 372 return ("Rack Mount Chassis"); 373 case 0x18: 374 return ("Sealed-case PC"); 375 case 0x19: 376 return ("Multi-system chassis"); 377 case 0x1A: 378 return ("Compact PCI"); 379 case 0x1B: 380 return ("Advanced TCA"); 381 case 0x1C: 382 return ("Blade"); 383 case 0x1D: 384 return ("Blade Enclosure"); 385 case 0x1E: 386 return ("Tablet"); 387 case 0x1F: 388 return ("Convertible"); 389 case 0x20: 390 return ("Detachable"); 391 case 0x21: 392 return ("IoT Gateway"); 393 case 0x22: 394 return ("Embedded PC"); 395 case 0x23: 396 return ("Mini PC"); 397 case 0x24: 398 return ("Stick PC"); 399 } 400 401 return ("Undefined"); 402 } 403 404 static caddr_t 405 smbios_parse_table(const caddr_t addr) 406 { 407 caddr_t cp; 408 int proc, size, osize, type; 409 uint8_t bios_minor, bios_major; 410 char buf[16]; 411 412 type = SMBIOS_GET8(addr, 0); /* 3.1.2 Structure Header Format */ 413 switch(type) { 414 case 0: /* 3.3.1 BIOS Information (Type 0) */ 415 smbios_setenv("smbios.bios.vendor", addr, 0x04); 416 smbios_setenv("smbios.bios.version", addr, 0x05); 417 smbios_setenv("smbios.bios.reldate", addr, 0x08); 418 bios_major = SMBIOS_GET8(addr, 0x14); 419 bios_minor = SMBIOS_GET8(addr, 0x15); 420 if (bios_minor != 0xFF && bios_major != 0xFF) { 421 snprintf(buf, sizeof(buf), "%u.%u", 422 bios_major, bios_minor); 423 setenv("smbios.bios.revision", buf, 1); 424 } 425 break; 426 427 case 1: /* 3.3.2 System Information (Type 1) */ 428 smbios_setenv("smbios.system.maker", addr, 0x04); 429 smbios_setenv("smbios.system.product", addr, 0x05); 430 smbios_setenv("smbios.system.version", addr, 0x06); 431 #ifdef SMBIOS_SERIAL_NUMBERS 432 smbios_setenv("smbios.system.serial", addr, 0x07); 433 smbios_setuuid("smbios.system.uuid", addr + 0x08, smbios.ver); 434 #endif 435 if (smbios.major > 2 || 436 (smbios.major == 2 && smbios.minor >= 4)) { 437 smbios_setenv("smbios.system.sku", addr, 0x19); 438 smbios_setenv("smbios.system.family", addr, 0x1a); 439 } 440 break; 441 442 case 2: /* 3.3.3 Base Board (or Module) Information (Type 2) */ 443 smbios_setenv("smbios.planar.maker", addr, 0x04); 444 smbios_setenv("smbios.planar.product", addr, 0x05); 445 smbios_setenv("smbios.planar.version", addr, 0x06); 446 #ifdef SMBIOS_SERIAL_NUMBERS 447 smbios_setenv("smbios.planar.serial", addr, 0x07); 448 smbios_setenv("smbios.planar.tag", addr, 0x08); 449 #endif 450 smbios_setenv("smbios.planar.location", addr, 0x0a); 451 break; 452 453 case 3: /* 3.3.4 System Enclosure or Chassis (Type 3) */ 454 smbios_setenv("smbios.chassis.maker", addr, 0x04); 455 setenv("smbios.chassis.type", smbios_parse_chassis_type(addr), 1); 456 smbios_setenv("smbios.chassis.version", addr, 0x06); 457 #ifdef SMBIOS_SERIAL_NUMBERS 458 smbios_setenv("smbios.chassis.serial", addr, 0x07); 459 smbios_setenv("smbios.chassis.tag", addr, 0x08); 460 #endif 461 break; 462 463 case 4: /* 3.3.5 Processor Information (Type 4) */ 464 /* 465 * Offset 18h: Processor Status 466 * 467 * Bit 7 Reserved, must be 0 468 * Bit 6 CPU Socket Populated 469 * 1 - CPU Socket Populated 470 * 0 - CPU Socket Unpopulated 471 * Bit 5:3 Reserved, must be zero 472 * Bit 2:0 CPU Status 473 * 0h - Unknown 474 * 1h - CPU Enabled 475 * 2h - CPU Disabled by User via BIOS Setup 476 * 3h - CPU Disabled by BIOS (POST Error) 477 * 4h - CPU is Idle, waiting to be enabled 478 * 5-6h - Reserved 479 * 7h - Other 480 */ 481 proc = SMBIOS_GET8(addr, 0x18); 482 if ((proc & 0x07) == 1) 483 smbios.enabled_sockets++; 484 if ((proc & 0x40) != 0) 485 smbios.populated_sockets++; 486 break; 487 488 case 6: /* 3.3.7 Memory Module Information (Type 6, Obsolete) */ 489 /* 490 * Offset 0Ah: Enabled Size 491 * 492 * Bit 7 Bank connection 493 * 1 - Double-bank connection 494 * 0 - Single-bank connection 495 * Bit 6:0 Size (n), where 2**n is the size in MB 496 * 7Dh - Not determinable (Installed Size only) 497 * 7Eh - Module is installed, but no memory 498 * has been enabled 499 * 7Fh - Not installed 500 */ 501 osize = SMBIOS_GET8(addr, 0x0a) & 0x7f; 502 if (osize > 0 && osize < 22) 503 smbios.old_enabled_memory += 1 << (osize + 10); 504 break; 505 506 case 17: /* 3.3.18 Memory Device (Type 17) */ 507 /* 508 * Offset 0Ch: Size 509 * 510 * Bit 15 Granularity 511 * 1 - Value is in kilobytes units 512 * 0 - Value is in megabytes units 513 * Bit 14:0 Size 514 */ 515 size = SMBIOS_GET16(addr, 0x0c); 516 if (size != 0 && size != 0xffff) 517 smbios.enabled_memory += (size & 0x8000) != 0 ? 518 (size & 0x7fff) : (size << 10); 519 break; 520 521 case SMBIOS_EOT_TYPE: /* 3.3.42 End-of-Table (Type 127) */ 522 return (NULL); 523 524 default: /* skip other types */ 525 break; 526 } 527 528 /* Find structure terminator. */ 529 cp = SMBIOS_GETSTR(addr); 530 while (SMBIOS_GET16(cp, 0) != 0) 531 cp++; 532 533 return (cp + 2); 534 } 535 536 static caddr_t 537 smbios_find_struct(int type) 538 { 539 caddr_t dmi; 540 size_t i; 541 caddr_t ep; 542 543 if (smbios.addr == NULL) 544 return (NULL); 545 546 ep = smbios.addr + smbios.length; 547 for (dmi = smbios.addr, i = 0; 548 dmi < ep && i < smbios.count; i++) { 549 const uint8_t seen_type = SMBIOS_GET8(dmi, 0); 550 551 if (seen_type == type) 552 return (dmi); 553 if (seen_type == SMBIOS_EOT_TYPE) 554 /* End of table. */ 555 break; 556 /* Find structure terminator. */ 557 dmi = SMBIOS_GETSTR(dmi); 558 while (SMBIOS_GET16(dmi, 0) != 0 && dmi < ep) 559 dmi++; 560 /* Skip it. */ 561 dmi += 2; 562 } 563 564 return (NULL); 565 } 566 567 static void 568 smbios_probe(const caddr_t addr) 569 { 570 caddr_t saddr, info; 571 uintptr_t paddr; 572 int maj_off; 573 int min_off; 574 575 /* Search signatures and validate checksums. */ 576 saddr = addr != NULL ? smbios_sigsearch(addr, 1) : 577 smbios_sigsearch(PTOV(SMBIOS_START), SMBIOS_LENGTH); 578 if (saddr == NULL) 579 return; 580 581 if (smbios.is_64bit_ep) { 582 /* Structure Table Length */ 583 smbios.length = SMBIOS_GET32(saddr, 0x0c); 584 /* Structure Table Address */ 585 paddr = SMBIOS_GET64(saddr, 0x10); 586 /* Not present in V3, set it to the maximum value (no limit). */ 587 smbios.count = -1; 588 /* 589 * No BCD revision in V3, we'll determine the version thanks to 590 * the major and minor fields below. 591 */ 592 smbios.ver = 0; 593 maj_off = 0x07; 594 min_off = 0x08; 595 } else { 596 /* Structure Table Length */ 597 smbios.length = SMBIOS_GET16(saddr, 0x16); 598 /* Structure Table Address */ 599 paddr = SMBIOS_GET32(saddr, 0x18); 600 /* No. of SMBIOS Structures */ 601 smbios.count = SMBIOS_GET16(saddr, 0x1c); 602 /* SMBIOS BCD Revision */ 603 smbios.ver = SMBIOS_GET8(saddr, 0x1e); 604 if (smbios.ver != 0) { 605 smbios.major = smbios.ver >> 4; 606 smbios.minor = smbios.ver & 0x0f; 607 if (smbios.major > 9 || smbios.minor > 9) 608 smbios.ver = 0; 609 } 610 maj_off = 0x06; 611 min_off = 0x07; 612 } 613 614 615 if (smbios.ver == 0) { 616 /* 617 * v3 table, or v2 with BCD revision being 0 or bad. Use the 618 * major and minor version fields. 619 */ 620 smbios.major = SMBIOS_GET8(saddr, maj_off); 621 smbios.minor = SMBIOS_GET8(saddr, min_off); 622 } 623 smbios.ver = (smbios.major << 8) | smbios.minor; 624 smbios.addr = PTOV(paddr); 625 626 /* Get system information from SMBIOS */ 627 info = smbios_find_struct(0x00); 628 if (info != NULL) { 629 smbios.bios_vendor = smbios_getstring(info, 0x04); 630 } 631 info = smbios_find_struct(0x01); 632 if (info != NULL) { 633 smbios.maker = smbios_getstring(info, 0x04); 634 smbios.product = smbios_getstring(info, 0x05); 635 } 636 } 637 638 caddr_t 639 smbios_detect(const caddr_t addr) 640 { 641 char buf[16]; 642 caddr_t dmi; 643 size_t i; 644 645 smbios_probe(addr); 646 if (smbios.addr == NULL) 647 return (NULL); 648 649 for (dmi = smbios.addr, i = 0; dmi != NULL && 650 dmi < smbios.addr + smbios.length && i < smbios.count; i++) 651 dmi = smbios_parse_table(dmi); 652 653 setenv("smbios.entry_point_type", smbios.is_64bit_ep ? 654 "v3 (64-bit)" : "v2.1 (32-bit)", 1); 655 sprintf(buf, "%d.%d", smbios.major, smbios.minor); 656 setenv("smbios.version", buf, 1); 657 if (smbios.enabled_memory > 0 || smbios.old_enabled_memory > 0) { 658 sprintf(buf, "%u", smbios.enabled_memory > 0 ? 659 smbios.enabled_memory : smbios.old_enabled_memory); 660 setenv("smbios.memory.enabled", buf, 1); 661 } 662 if (smbios.enabled_sockets > 0) { 663 sprintf(buf, "%u", smbios.enabled_sockets); 664 setenv("smbios.socket.enabled", buf, 1); 665 } 666 if (smbios.populated_sockets > 0) { 667 sprintf(buf, "%u", smbios.populated_sockets); 668 setenv("smbios.socket.populated", buf, 1); 669 } 670 671 return (smbios.addr); 672 } 673 674 static int 675 smbios_match_str(const char* s1, const char* s2) 676 { 677 return (s1 == NULL || (s2 != NULL && !strcmp(s1, s2))); 678 } 679 680 int 681 smbios_match(const char* bios_vendor, const char* maker, 682 const char* product) 683 { 684 static bool probed = false; 685 686 /* 687 * This routine is called only from non-EFI loaders on determining the 688 * amount of usable memory. In particular, it is so before malloc() can 689 * be used, so before smbios_detect() can be called (as it uses 690 * setenv()). Consequently, since smbios_probe() is not exported, we 691 * ensure it has been called beforehand to fetch into the static 692 * 'smbios' structure the metadata that is to be matched. 693 */ 694 if (!probed) { 695 probed = true; 696 smbios_probe(NULL); 697 } 698 699 return (smbios_match_str(bios_vendor, smbios.bios_vendor) && 700 smbios_match_str(maker, smbios.maker) && 701 smbios_match_str(product, smbios.product)); 702 } 703