2 * Copyright (c) 2005-2009 Jung-uk Kim <jkim@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 #include <sys/endian.h>
33 #define PTOV(x) ptov(x)
35 /* Only enable 64-bit entry point if it makes sense */
36 #if __SIZEOF_POINTER__ > 4
41 * Detect SMBIOS and export information about the SMBIOS into the
44 * System Management BIOS Reference Specification, v2.6 Final
45 * http://www.dmtf.org/standards/published_documents/DSP0134_2.6.0.pdf
49 * 2.1.1 SMBIOS Structure Table Entry Point
51 * "On non-EFI systems, the SMBIOS Entry Point structure, described below, can
52 * be located by application software by searching for the anchor-string on
53 * paragraph (16-byte) boundaries within the physical memory address range
54 * 000F0000h to 000FFFFFh. This entry point encapsulates an intermediate anchor
55 * string that is used by some existing DMI browsers."
57 #define SMBIOS_START 0xf0000
58 #define SMBIOS_LENGTH 0x10000
59 #define SMBIOS_STEP 0x10
60 #define SMBIOS_SIG "_SM_"
61 #define SMBIOS3_SIG "_SM3_"
62 #define SMBIOS_DMI_SIG "_DMI_"
64 #define SMBIOS_GET8(base, off) (*(uint8_t *)((base) + (off)))
65 #define SMBIOS_GET16(base, off) (*(uint16_t *)((base) + (off)))
66 #define SMBIOS_GET32(base, off) (*(uint32_t *)((base) + (off)))
67 #define SMBIOS_GET64(base, off) (*(uint64_t *)((base) + (off)))
69 #define SMBIOS_GETLEN(base) SMBIOS_GET8(base, 0x01)
70 #define SMBIOS_GETSTR(base) ((base) + SMBIOS_GETLEN(base))
80 const char* bios_vendor;
83 uint32_t enabled_memory;
84 uint32_t old_enabled_memory;
85 uint8_t enabled_sockets;
86 uint8_t populated_sockets;
89 static struct smbios_attr smbios;
95 smbios_checksum(const caddr_t addr, const uint8_t len)
100 for (sum = 0, i = 0; i < len; i++)
101 sum += SMBIOS_GET8(addr, i);
106 smbios_sigsearch(const caddr_t addr, const uint32_t len)
110 /* Search on 16-byte boundaries. */
111 for (cp = addr; cp < addr + len; cp += SMBIOS_STEP) {
112 /* v2.1, 32-bit Entry point */
113 if (strncmp(cp, SMBIOS_SIG, sizeof(SMBIOS_SIG) - 1) == 0 &&
114 smbios_checksum(cp, SMBIOS_GET8(cp, 0x05)) == 0 &&
115 strncmp(cp + 0x10, SMBIOS_DMI_SIG, 5) == 0 &&
116 smbios_checksum(cp + 0x10, 0x0f) == 0)
120 /* v3.0, 64-bit Entry point */
121 if (strncmp(cp, SMBIOS3_SIG, sizeof(SMBIOS3_SIG) - 1) == 0 &&
122 smbios_checksum(cp, SMBIOS_GET8(cp, 0x06)) == 0) {
132 smbios_getstring(caddr_t addr, const int offset)
137 idx = SMBIOS_GET8(addr, offset);
139 cp = SMBIOS_GETSTR(addr);
140 for (i = 1; i < idx; i++)
141 cp += strlen(cp) + 1;
148 smbios_setenv(const char *name, caddr_t addr, const int offset)
152 val = smbios_getstring(addr, offset);
154 setenv(name, val, 1);
157 #ifdef SMBIOS_SERIAL_NUMBERS
160 #define UUID_TYPE uint32_t
161 #define UUID_STEP sizeof(UUID_TYPE)
162 #define UUID_ALL_BITS (UUID_SIZE / UUID_STEP)
163 #define UUID_GET(base, off) (*(UUID_TYPE *)((base) + (off)))
166 smbios_setuuid(const char *name, const caddr_t addr, const int ver)
169 int byteorder, i, ones, zeros;
174 for (i = 0, ones = 0, zeros = 0; i < UUID_SIZE; i += UUID_STEP) {
175 n = UUID_GET(addr, i) + 1;
176 if (zeros == 0 && n == 0)
178 else if (ones == 0 && n == 1)
184 if (ones != UUID_ALL_BITS && zeros != UUID_ALL_BITS) {
186 * 3.3.2.1 System UUID
188 * "Although RFC 4122 recommends network byte order for all
189 * fields, the PC industry (including the ACPI, UEFI, and
190 * Microsoft specifications) has consistently used
191 * little-endian byte encoding for the first three fields:
192 * time_low, time_mid, time_hi_and_version. The same encoding,
193 * also known as wire format, should also be used for the
194 * SMBIOS representation of the UUID."
196 * Note: We use network byte order for backward compatibility
197 * unless SMBIOS version is 2.6+ or little-endian is forced.
199 #if defined(SMBIOS_LITTLE_ENDIAN_UUID)
200 byteorder = LITTLE_ENDIAN;
201 #elif defined(SMBIOS_NETWORK_ENDIAN_UUID)
202 byteorder = BIG_ENDIAN;
204 byteorder = ver < 0x0206 ? BIG_ENDIAN : LITTLE_ENDIAN;
206 if (byteorder != LITTLE_ENDIAN) {
207 f1 = ntohl(SMBIOS_GET32(addr, 0));
208 f2 = ntohs(SMBIOS_GET16(addr, 4));
209 f3 = ntohs(SMBIOS_GET16(addr, 6));
211 f1 = le32toh(SMBIOS_GET32(addr, 0));
212 f2 = le16toh(SMBIOS_GET16(addr, 4));
213 f3 = le16toh(SMBIOS_GET16(addr, 6));
216 "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
217 f1, f2, f3, SMBIOS_GET8(addr, 8), SMBIOS_GET8(addr, 9),
218 SMBIOS_GET8(addr, 10), SMBIOS_GET8(addr, 11),
219 SMBIOS_GET8(addr, 12), SMBIOS_GET8(addr, 13),
220 SMBIOS_GET8(addr, 14), SMBIOS_GET8(addr, 15));
221 setenv(name, uuid, 1);
234 smbios_parse_chassis_type(caddr_t addr)
238 type = SMBIOS_GET8(addr, 0x5);
247 return ("Low Profile Desktop");
249 return ("Pizza Box");
251 return ("Mini Tower");
261 return ("Hand Held");
263 return ("Docking Station");
265 return ("All in One");
267 return ("Sub Notebook");
269 return ("Lunch Box");
271 return ("Space-saving");
273 return ("Main Server Chassis");
275 return ("Expansion Chassis");
277 return ("SubChassis");
279 return ("Bus Expansion Chassis");
281 return ("Peripheral Chassis");
283 return ("RAID Chassis");
285 return ("Rack Mount Chassis");
287 return ("Sealed-case PC");
289 return ("Multi-system chassis");
291 return ("Compact PCI");
293 return ("Advanced TCA");
297 return ("Blade Enclosure");
301 return ("Convertible");
303 return ("Detachable");
305 return ("IoT Gateway");
307 return ("Embedded PC");
314 return ("Undefined");
318 smbios_parse_table(const caddr_t addr)
321 int proc, size, osize, type;
322 uint8_t bios_minor, bios_major;
325 type = SMBIOS_GET8(addr, 0); /* 3.1.2 Structure Header Format */
327 case 0: /* 3.3.1 BIOS Information (Type 0) */
328 smbios_setenv("smbios.bios.vendor", addr, 0x04);
329 smbios_setenv("smbios.bios.version", addr, 0x05);
330 smbios_setenv("smbios.bios.reldate", addr, 0x08);
331 bios_major = SMBIOS_GET8(addr, 0x14);
332 bios_minor = SMBIOS_GET8(addr, 0x15);
333 if (bios_minor != 0xFF && bios_major != 0xFF) {
334 snprintf(buf, sizeof(buf), "%u.%u",
335 bios_major, bios_minor);
336 setenv("smbios.bios.revision", buf, 1);
340 case 1: /* 3.3.2 System Information (Type 1) */
341 smbios_setenv("smbios.system.maker", addr, 0x04);
342 smbios_setenv("smbios.system.product", addr, 0x05);
343 smbios_setenv("smbios.system.version", addr, 0x06);
344 #ifdef SMBIOS_SERIAL_NUMBERS
345 smbios_setenv("smbios.system.serial", addr, 0x07);
346 smbios_setuuid("smbios.system.uuid", addr + 0x08, smbios.ver);
348 if (smbios.major > 2 ||
349 (smbios.major == 2 && smbios.minor >= 4)) {
350 smbios_setenv("smbios.system.sku", addr, 0x19);
351 smbios_setenv("smbios.system.family", addr, 0x1a);
355 case 2: /* 3.3.3 Base Board (or Module) Information (Type 2) */
356 smbios_setenv("smbios.planar.maker", addr, 0x04);
357 smbios_setenv("smbios.planar.product", addr, 0x05);
358 smbios_setenv("smbios.planar.version", addr, 0x06);
359 #ifdef SMBIOS_SERIAL_NUMBERS
360 smbios_setenv("smbios.planar.serial", addr, 0x07);
361 smbios_setenv("smbios.planar.tag", addr, 0x08);
363 smbios_setenv("smbios.planar.location", addr, 0x0a);
366 case 3: /* 3.3.4 System Enclosure or Chassis (Type 3) */
367 smbios_setenv("smbios.chassis.maker", addr, 0x04);
368 setenv("smbios.chassis.type", smbios_parse_chassis_type(addr), 1);
369 smbios_setenv("smbios.chassis.version", addr, 0x06);
370 #ifdef SMBIOS_SERIAL_NUMBERS
371 smbios_setenv("smbios.chassis.serial", addr, 0x07);
372 smbios_setenv("smbios.chassis.tag", addr, 0x08);
376 case 4: /* 3.3.5 Processor Information (Type 4) */
378 * Offset 18h: Processor Status
380 * Bit 7 Reserved, must be 0
381 * Bit 6 CPU Socket Populated
382 * 1 - CPU Socket Populated
383 * 0 - CPU Socket Unpopulated
384 * Bit 5:3 Reserved, must be zero
388 * 2h - CPU Disabled by User via BIOS Setup
389 * 3h - CPU Disabled by BIOS (POST Error)
390 * 4h - CPU is Idle, waiting to be enabled
394 proc = SMBIOS_GET8(addr, 0x18);
395 if ((proc & 0x07) == 1)
396 smbios.enabled_sockets++;
397 if ((proc & 0x40) != 0)
398 smbios.populated_sockets++;
401 case 6: /* 3.3.7 Memory Module Information (Type 6, Obsolete) */
403 * Offset 0Ah: Enabled Size
405 * Bit 7 Bank connection
406 * 1 - Double-bank connection
407 * 0 - Single-bank connection
408 * Bit 6:0 Size (n), where 2**n is the size in MB
409 * 7Dh - Not determinable (Installed Size only)
410 * 7Eh - Module is installed, but no memory
412 * 7Fh - Not installed
414 osize = SMBIOS_GET8(addr, 0x0a) & 0x7f;
415 if (osize > 0 && osize < 22)
416 smbios.old_enabled_memory += 1 << (osize + 10);
419 case 17: /* 3.3.18 Memory Device (Type 17) */
424 * 1 - Value is in kilobytes units
425 * 0 - Value is in megabytes units
428 size = SMBIOS_GET16(addr, 0x0c);
429 if (size != 0 && size != 0xffff)
430 smbios.enabled_memory += (size & 0x8000) != 0 ?
431 (size & 0x7fff) : (size << 10);
434 default: /* skip other types */
438 /* Find structure terminator. */
439 cp = SMBIOS_GETSTR(addr);
440 while (SMBIOS_GET16(cp, 0) != 0)
447 smbios_find_struct(int type)
452 if (smbios.addr == NULL)
455 for (dmi = smbios.addr, i = 0;
456 dmi < smbios.addr + smbios.length && i < smbios.count; i++) {
457 if (SMBIOS_GET8(dmi, 0) == type)
459 /* Find structure terminator. */
460 dmi = SMBIOS_GETSTR(dmi);
461 while (SMBIOS_GET16(dmi, 0) != 0)
470 smbios_probe(const caddr_t addr)
481 /* Search signatures and validate checksums. */
482 saddr = smbios_sigsearch(addr ? addr : PTOV(SMBIOS_START),
489 smbios.length = SMBIOS_GET32(saddr, 0x0c); /* Structure Table Length */
490 paddr = SMBIOS_GET64(saddr, 0x10); /* Structure Table Address */
491 smbios.count = -1; /* not present in V3 */
492 smbios.ver = 0; /* not present in V3 */
498 smbios.length = SMBIOS_GET16(saddr, 0x16); /* Structure Table Length */
499 paddr = SMBIOS_GET32(saddr, 0x18); /* Structure Table Address */
500 smbios.count = SMBIOS_GET16(saddr, 0x1c); /* No of SMBIOS Structures */
501 smbios.ver = SMBIOS_GET8(saddr, 0x1e); /* SMBIOS BCD Revision */
507 if (smbios.ver != 0) {
508 smbios.major = smbios.ver >> 4;
509 smbios.minor = smbios.ver & 0x0f;
510 if (smbios.major > 9 || smbios.minor > 9)
513 if (smbios.ver == 0) {
514 smbios.major = SMBIOS_GET8(saddr, maj_off);/* SMBIOS Major Version */
515 smbios.minor = SMBIOS_GET8(saddr, min_off);/* SMBIOS Minor Version */
517 smbios.ver = (smbios.major << 8) | smbios.minor;
518 smbios.addr = PTOV(paddr);
520 /* Get system information from SMBIOS */
521 info = smbios_find_struct(0x00);
523 smbios.bios_vendor = smbios_getstring(info, 0x04);
525 info = smbios_find_struct(0x01);
527 smbios.maker = smbios_getstring(info, 0x04);
528 smbios.product = smbios_getstring(info, 0x05);
533 smbios_detect(const caddr_t addr)
540 if (smbios.addr == NULL)
543 for (dmi = smbios.addr, i = 0;
544 dmi < smbios.addr + smbios.length && i < smbios.count; i++)
545 dmi = smbios_parse_table(dmi);
547 sprintf(buf, "%d.%d", smbios.major, smbios.minor);
548 setenv("smbios.version", buf, 1);
549 if (smbios.enabled_memory > 0 || smbios.old_enabled_memory > 0) {
550 sprintf(buf, "%u", smbios.enabled_memory > 0 ?
551 smbios.enabled_memory : smbios.old_enabled_memory);
552 setenv("smbios.memory.enabled", buf, 1);
554 if (smbios.enabled_sockets > 0) {
555 sprintf(buf, "%u", smbios.enabled_sockets);
556 setenv("smbios.socket.enabled", buf, 1);
558 if (smbios.populated_sockets > 0) {
559 sprintf(buf, "%u", smbios.populated_sockets);
560 setenv("smbios.socket.populated", buf, 1);
565 smbios_match_str(const char* s1, const char* s2)
567 return (s1 == NULL || (s2 != NULL && !strcmp(s1, s2)));
571 smbios_match(const char* bios_vendor, const char* maker,
574 /* XXXRP currently, only called from non-EFI. */
576 return (smbios_match_str(bios_vendor, smbios.bios_vendor) &&
577 smbios_match_str(maker, smbios.maker) &&
578 smbios_match_str(product, smbios.product));