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)
36 * Detect SMBIOS and export information about the SMBIOS into the
39 * System Management BIOS Reference Specification, v2.6 Final
40 * http://www.dmtf.org/standards/published_documents/DSP0134_2.6.0.pdf
44 * 2.1.1 SMBIOS Structure Table Entry Point
46 * "On non-EFI systems, the SMBIOS Entry Point structure, described below, can
47 * be located by application software by searching for the anchor-string on
48 * paragraph (16-byte) boundaries within the physical memory address range
49 * 000F0000h to 000FFFFFh. This entry point encapsulates an intermediate anchor
50 * string that is used by some existing DMI browsers."
52 #define SMBIOS_START 0xf0000
53 #define SMBIOS_LENGTH 0x10000
54 #define SMBIOS_STEP 0x10
55 #define SMBIOS_SIG "_SM_"
56 #define SMBIOS_DMI_SIG "_DMI_"
58 #define SMBIOS_GET8(base, off) (*(uint8_t *)((base) + (off)))
59 #define SMBIOS_GET16(base, off) (*(uint16_t *)((base) + (off)))
60 #define SMBIOS_GET32(base, off) (*(uint32_t *)((base) + (off)))
62 #define SMBIOS_GETLEN(base) SMBIOS_GET8(base, 0x01)
63 #define SMBIOS_GETSTR(base) ((base) + SMBIOS_GETLEN(base))
73 const char* bios_vendor;
76 uint32_t enabled_memory;
77 uint32_t old_enabled_memory;
78 uint8_t enabled_sockets;
79 uint8_t populated_sockets;
82 static struct smbios_attr smbios;
85 smbios_checksum(const caddr_t addr, const uint8_t len)
90 for (sum = 0, i = 0; i < len; i++)
91 sum += SMBIOS_GET8(addr, i);
96 smbios_sigsearch(const caddr_t addr, const uint32_t len)
100 /* Search on 16-byte boundaries. */
101 for (cp = addr; cp < addr + len; cp += SMBIOS_STEP)
102 if (strncmp(cp, SMBIOS_SIG, 4) == 0 &&
103 smbios_checksum(cp, SMBIOS_GET8(cp, 0x05)) == 0 &&
104 strncmp(cp + 0x10, SMBIOS_DMI_SIG, 5) == 0 &&
105 smbios_checksum(cp + 0x10, 0x0f) == 0)
111 smbios_getstring(caddr_t addr, const int offset)
116 idx = SMBIOS_GET8(addr, offset);
118 cp = SMBIOS_GETSTR(addr);
119 for (i = 1; i < idx; i++)
120 cp += strlen(cp) + 1;
127 smbios_setenv(const char *name, caddr_t addr, const int offset)
131 val = smbios_getstring(addr, offset);
133 setenv(name, val, 1);
136 #ifdef SMBIOS_SERIAL_NUMBERS
139 #define UUID_TYPE uint32_t
140 #define UUID_STEP sizeof(UUID_TYPE)
141 #define UUID_ALL_BITS (UUID_SIZE / UUID_STEP)
142 #define UUID_GET(base, off) (*(UUID_TYPE *)((base) + (off)))
145 smbios_setuuid(const char *name, const caddr_t addr, const int ver)
148 int byteorder, i, ones, zeros;
153 for (i = 0, ones = 0, zeros = 0; i < UUID_SIZE; i += UUID_STEP) {
154 n = UUID_GET(addr, i) + 1;
155 if (zeros == 0 && n == 0)
157 else if (ones == 0 && n == 1)
163 if (ones != UUID_ALL_BITS && zeros != UUID_ALL_BITS) {
165 * 3.3.2.1 System UUID
167 * "Although RFC 4122 recommends network byte order for all
168 * fields, the PC industry (including the ACPI, UEFI, and
169 * Microsoft specifications) has consistently used
170 * little-endian byte encoding for the first three fields:
171 * time_low, time_mid, time_hi_and_version. The same encoding,
172 * also known as wire format, should also be used for the
173 * SMBIOS representation of the UUID."
175 * Note: We use network byte order for backward compatibility
176 * unless SMBIOS version is 2.6+ or little-endian is forced.
178 #if defined(SMBIOS_LITTLE_ENDIAN_UUID)
179 byteorder = LITTLE_ENDIAN;
180 #elif defined(SMBIOS_NETWORK_ENDIAN_UUID)
181 byteorder = BIG_ENDIAN;
183 byteorder = ver < 0x0206 ? BIG_ENDIAN : LITTLE_ENDIAN;
185 if (byteorder != LITTLE_ENDIAN) {
186 f1 = ntohl(SMBIOS_GET32(addr, 0));
187 f2 = ntohs(SMBIOS_GET16(addr, 4));
188 f3 = ntohs(SMBIOS_GET16(addr, 6));
190 f1 = le32toh(SMBIOS_GET32(addr, 0));
191 f2 = le16toh(SMBIOS_GET16(addr, 4));
192 f3 = le16toh(SMBIOS_GET16(addr, 6));
195 "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
196 f1, f2, f3, SMBIOS_GET8(addr, 8), SMBIOS_GET8(addr, 9),
197 SMBIOS_GET8(addr, 10), SMBIOS_GET8(addr, 11),
198 SMBIOS_GET8(addr, 12), SMBIOS_GET8(addr, 13),
199 SMBIOS_GET8(addr, 14), SMBIOS_GET8(addr, 15));
200 setenv(name, uuid, 1);
213 smbios_parse_table(const caddr_t addr)
216 int proc, size, osize, type;
218 type = SMBIOS_GET8(addr, 0); /* 3.1.2 Structure Header Format */
220 case 0: /* 3.3.1 BIOS Information (Type 0) */
221 smbios_setenv("smbios.bios.vendor", addr, 0x04);
222 smbios_setenv("smbios.bios.version", addr, 0x05);
223 smbios_setenv("smbios.bios.reldate", addr, 0x08);
226 case 1: /* 3.3.2 System Information (Type 1) */
227 smbios_setenv("smbios.system.maker", addr, 0x04);
228 smbios_setenv("smbios.system.product", addr, 0x05);
229 smbios_setenv("smbios.system.version", addr, 0x06);
230 #ifdef SMBIOS_SERIAL_NUMBERS
231 smbios_setenv("smbios.system.serial", addr, 0x07);
232 smbios_setuuid("smbios.system.uuid", addr + 0x08, smbios.ver);
234 if (smbios.major > 2 ||
235 (smbios.major == 2 && smbios.minor >= 4)) {
236 smbios_setenv("smbios.system.sku", addr, 0x19);
237 smbios_setenv("smbios.system.family", addr, 0x1a);
241 case 2: /* 3.3.3 Base Board (or Module) Information (Type 2) */
242 smbios_setenv("smbios.planar.maker", addr, 0x04);
243 smbios_setenv("smbios.planar.product", addr, 0x05);
244 smbios_setenv("smbios.planar.version", addr, 0x06);
245 #ifdef SMBIOS_SERIAL_NUMBERS
246 smbios_setenv("smbios.planar.serial", addr, 0x07);
247 smbios_setenv("smbios.planar.tag", addr, 0x08);
249 smbios_setenv("smbios.planar.location", addr, 0x0a);
252 case 3: /* 3.3.4 System Enclosure or Chassis (Type 3) */
253 smbios_setenv("smbios.chassis.maker", addr, 0x04);
254 smbios_setenv("smbios.chassis.version", addr, 0x06);
255 #ifdef SMBIOS_SERIAL_NUMBERS
256 smbios_setenv("smbios.chassis.serial", addr, 0x07);
257 smbios_setenv("smbios.chassis.tag", addr, 0x08);
261 case 4: /* 3.3.5 Processor Information (Type 4) */
263 * Offset 18h: Processor Status
265 * Bit 7 Reserved, must be 0
266 * Bit 6 CPU Socket Populated
267 * 1 - CPU Socket Populated
268 * 0 - CPU Socket Unpopulated
269 * Bit 5:3 Reserved, must be zero
273 * 2h - CPU Disabled by User via BIOS Setup
274 * 3h - CPU Disabled by BIOS (POST Error)
275 * 4h - CPU is Idle, waiting to be enabled
279 proc = SMBIOS_GET8(addr, 0x18);
280 if ((proc & 0x07) == 1)
281 smbios.enabled_sockets++;
282 if ((proc & 0x40) != 0)
283 smbios.populated_sockets++;
286 case 6: /* 3.3.7 Memory Module Information (Type 6, Obsolete) */
288 * Offset 0Ah: Enabled Size
290 * Bit 7 Bank connection
291 * 1 - Double-bank connection
292 * 0 - Single-bank connection
293 * Bit 6:0 Size (n), where 2**n is the size in MB
294 * 7Dh - Not determinable (Installed Size only)
295 * 7Eh - Module is installed, but no memory
297 * 7Fh - Not installed
299 osize = SMBIOS_GET8(addr, 0x0a) & 0x7f;
300 if (osize > 0 && osize < 22)
301 smbios.old_enabled_memory += 1 << (osize + 10);
304 case 17: /* 3.3.18 Memory Device (Type 17) */
309 * 1 - Value is in kilobytes units
310 * 0 - Value is in megabytes units
313 size = SMBIOS_GET16(addr, 0x0c);
314 if (size != 0 && size != 0xffff)
315 smbios.enabled_memory += (size & 0x8000) != 0 ?
316 (size & 0x7fff) : (size << 10);
319 default: /* skip other types */
323 /* Find structure terminator. */
324 cp = SMBIOS_GETSTR(addr);
325 while (SMBIOS_GET16(cp, 0) != 0)
332 smbios_find_struct(int type)
337 if (smbios.addr == NULL)
340 for (dmi = smbios.addr, i = 0;
341 dmi < smbios.addr + smbios.length && i < smbios.count; i++) {
342 if (SMBIOS_GET8(dmi, 0) == type)
344 /* Find structure terminator. */
345 dmi = SMBIOS_GETSTR(dmi);
346 while (SMBIOS_GET16(dmi, 0) != 0)
355 smbios_probe(const caddr_t addr)
364 /* Search signatures and validate checksums. */
365 saddr = smbios_sigsearch(addr ? addr : PTOV(SMBIOS_START),
370 smbios.length = SMBIOS_GET16(saddr, 0x16); /* Structure Table Length */
371 paddr = SMBIOS_GET32(saddr, 0x18); /* Structure Table Address */
372 smbios.count = SMBIOS_GET16(saddr, 0x1c); /* No of SMBIOS Structures */
373 smbios.ver = SMBIOS_GET8(saddr, 0x1e); /* SMBIOS BCD Revision */
375 if (smbios.ver != 0) {
376 smbios.major = smbios.ver >> 4;
377 smbios.minor = smbios.ver & 0x0f;
378 if (smbios.major > 9 || smbios.minor > 9)
381 if (smbios.ver == 0) {
382 smbios.major = SMBIOS_GET8(saddr, 0x06);/* SMBIOS Major Version */
383 smbios.minor = SMBIOS_GET8(saddr, 0x07);/* SMBIOS Minor Version */
385 smbios.ver = (smbios.major << 8) | smbios.minor;
386 smbios.addr = PTOV(paddr);
388 /* Get system information from SMBIOS */
389 info = smbios_find_struct(0x00);
391 smbios.bios_vendor = smbios_getstring(info, 0x04);
393 info = smbios_find_struct(0x01);
395 smbios.maker = smbios_getstring(info, 0x04);
396 smbios.product = smbios_getstring(info, 0x05);
401 smbios_detect(const caddr_t addr)
408 if (smbios.addr == NULL)
411 for (dmi = smbios.addr, i = 0;
412 dmi < smbios.addr + smbios.length && i < smbios.count; i++)
413 dmi = smbios_parse_table(dmi);
415 sprintf(buf, "%d.%d", smbios.major, smbios.minor);
416 setenv("smbios.version", buf, 1);
417 if (smbios.enabled_memory > 0 || smbios.old_enabled_memory > 0) {
418 sprintf(buf, "%u", smbios.enabled_memory > 0 ?
419 smbios.enabled_memory : smbios.old_enabled_memory);
420 setenv("smbios.memory.enabled", buf, 1);
422 if (smbios.enabled_sockets > 0) {
423 sprintf(buf, "%u", smbios.enabled_sockets);
424 setenv("smbios.socket.enabled", buf, 1);
426 if (smbios.populated_sockets > 0) {
427 sprintf(buf, "%u", smbios.populated_sockets);
428 setenv("smbios.socket.populated", buf, 1);
433 smbios_match_str(const char* s1, const char* s2)
435 return (s1 == NULL || (s2 != NULL && !strcmp(s1, s2)));
439 smbios_match(const char* bios_vendor, const char* maker,
442 /* XXXRP currently, only called from non-EFI. */
444 return (smbios_match_str(bios_vendor, smbios.bios_vendor) &&
445 smbios_match_str(maker, smbios.maker) &&
446 smbios_match_str(product, smbios.product));