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 <bootstrap.h>
32 #include <sys/endian.h>
35 /* In EFI, we don't need PTOV(). */
36 #define PTOV(x) (caddr_t)(x)
43 * Detect SMBIOS and export information about the SMBIOS into the
46 * System Management BIOS Reference Specification, v2.6 Final
47 * http://www.dmtf.org/standards/published_documents/DSP0134_2.6.0.pdf
51 * 2.1.1 SMBIOS Structure Table Entry Point
53 * "On non-EFI systems, the SMBIOS Entry Point structure, described below, can
54 * be located by application software by searching for the anchor-string on
55 * paragraph (16-byte) boundaries within the physical memory address range
56 * 000F0000h to 000FFFFFh. This entry point encapsulates an intermediate anchor
57 * string that is used by some existing DMI browsers."
59 #define SMBIOS_START 0xf0000
60 #define SMBIOS_LENGTH 0x10000
61 #define SMBIOS_STEP 0x10
62 #define SMBIOS_SIG "_SM_"
63 #define SMBIOS_DMI_SIG "_DMI_"
65 #define SMBIOS_GET8(base, off) (*(uint8_t *)((base) + (off)))
66 #define SMBIOS_GET16(base, off) (*(uint16_t *)((base) + (off)))
67 #define SMBIOS_GET32(base, off) (*(uint32_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;
92 smbios_checksum(const caddr_t addr, const uint8_t len)
97 for (sum = 0, i = 0; i < len; i++)
98 sum += SMBIOS_GET8(addr, i);
103 smbios_sigsearch(const caddr_t addr, const uint32_t len)
107 /* Search on 16-byte boundaries. */
108 for (cp = addr; cp < addr + len; cp += SMBIOS_STEP)
109 if (strncmp(cp, SMBIOS_SIG, 4) == 0 &&
110 smbios_checksum(cp, SMBIOS_GET8(cp, 0x05)) == 0 &&
111 strncmp(cp + 0x10, SMBIOS_DMI_SIG, 5) == 0 &&
112 smbios_checksum(cp + 0x10, 0x0f) == 0)
118 smbios_getstring(caddr_t addr, const int offset)
123 idx = SMBIOS_GET8(addr, offset);
125 cp = SMBIOS_GETSTR(addr);
126 for (i = 1; i < idx; i++)
127 cp += strlen(cp) + 1;
134 smbios_setenv(const char *name, caddr_t addr, const int offset)
138 val = smbios_getstring(addr, offset);
140 setenv(name, val, 1);
143 #ifdef SMBIOS_SERIAL_NUMBERS
146 #define UUID_TYPE uint32_t
147 #define UUID_STEP sizeof(UUID_TYPE)
148 #define UUID_ALL_BITS (UUID_SIZE / UUID_STEP)
149 #define UUID_GET(base, off) (*(UUID_TYPE *)((base) + (off)))
152 smbios_setuuid(const char *name, const caddr_t addr, const int ver)
155 int byteorder, i, ones, zeros;
160 for (i = 0, ones = 0, zeros = 0; i < UUID_SIZE; i += UUID_STEP) {
161 n = UUID_GET(addr, i) + 1;
162 if (zeros == 0 && n == 0)
164 else if (ones == 0 && n == 1)
170 if (ones != UUID_ALL_BITS && zeros != UUID_ALL_BITS) {
172 * 3.3.2.1 System UUID
174 * "Although RFC 4122 recommends network byte order for all
175 * fields, the PC industry (including the ACPI, UEFI, and
176 * Microsoft specifications) has consistently used
177 * little-endian byte encoding for the first three fields:
178 * time_low, time_mid, time_hi_and_version. The same encoding,
179 * also known as wire format, should also be used for the
180 * SMBIOS representation of the UUID."
182 * Note: We use network byte order for backward compatibility
183 * unless SMBIOS version is 2.6+ or little-endian is forced.
185 #if defined(SMBIOS_LITTLE_ENDIAN_UUID)
186 byteorder = LITTLE_ENDIAN;
187 #elif defined(SMBIOS_NETWORK_ENDIAN_UUID)
188 byteorder = BIG_ENDIAN;
190 byteorder = ver < 0x0206 ? BIG_ENDIAN : LITTLE_ENDIAN;
192 if (byteorder != LITTLE_ENDIAN) {
193 f1 = ntohl(SMBIOS_GET32(addr, 0));
194 f2 = ntohs(SMBIOS_GET16(addr, 4));
195 f3 = ntohs(SMBIOS_GET16(addr, 6));
197 f1 = le32toh(SMBIOS_GET32(addr, 0));
198 f2 = le16toh(SMBIOS_GET16(addr, 4));
199 f3 = le16toh(SMBIOS_GET16(addr, 6));
202 "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
203 f1, f2, f3, SMBIOS_GET8(addr, 8), SMBIOS_GET8(addr, 9),
204 SMBIOS_GET8(addr, 10), SMBIOS_GET8(addr, 11),
205 SMBIOS_GET8(addr, 12), SMBIOS_GET8(addr, 13),
206 SMBIOS_GET8(addr, 14), SMBIOS_GET8(addr, 15));
207 setenv(name, uuid, 1);
220 smbios_parse_table(const caddr_t addr)
223 int proc, size, osize, type;
225 type = SMBIOS_GET8(addr, 0); /* 3.1.2 Structure Header Format */
227 case 0: /* 3.3.1 BIOS Information (Type 0) */
228 smbios_setenv("smbios.bios.vendor", addr, 0x04);
229 smbios_setenv("smbios.bios.version", addr, 0x05);
230 smbios_setenv("smbios.bios.reldate", addr, 0x08);
233 case 1: /* 3.3.2 System Information (Type 1) */
234 smbios_setenv("smbios.system.maker", addr, 0x04);
235 smbios_setenv("smbios.system.product", addr, 0x05);
236 smbios_setenv("smbios.system.version", addr, 0x06);
237 #ifdef SMBIOS_SERIAL_NUMBERS
238 smbios_setenv("smbios.system.serial", addr, 0x07);
239 smbios_setuuid("smbios.system.uuid", addr + 0x08, smbios.ver);
241 if (smbios.major > 2 ||
242 (smbios.major == 2 && smbios.minor >= 4)) {
243 smbios_setenv("smbios.system.sku", addr, 0x19);
244 smbios_setenv("smbios.system.family", addr, 0x1a);
248 case 2: /* 3.3.3 Base Board (or Module) Information (Type 2) */
249 smbios_setenv("smbios.planar.maker", addr, 0x04);
250 smbios_setenv("smbios.planar.product", addr, 0x05);
251 smbios_setenv("smbios.planar.version", addr, 0x06);
252 #ifdef SMBIOS_SERIAL_NUMBERS
253 smbios_setenv("smbios.planar.serial", addr, 0x07);
254 smbios_setenv("smbios.planar.tag", addr, 0x08);
256 smbios_setenv("smbios.planar.location", addr, 0x0a);
259 case 3: /* 3.3.4 System Enclosure or Chassis (Type 3) */
260 smbios_setenv("smbios.chassis.maker", addr, 0x04);
261 smbios_setenv("smbios.chassis.version", addr, 0x06);
262 #ifdef SMBIOS_SERIAL_NUMBERS
263 smbios_setenv("smbios.chassis.serial", addr, 0x07);
264 smbios_setenv("smbios.chassis.tag", addr, 0x08);
268 case 4: /* 3.3.5 Processor Information (Type 4) */
270 * Offset 18h: Processor Status
272 * Bit 7 Reserved, must be 0
273 * Bit 6 CPU Socket Populated
274 * 1 - CPU Socket Populated
275 * 0 - CPU Socket Unpopulated
276 * Bit 5:3 Reserved, must be zero
280 * 2h - CPU Disabled by User via BIOS Setup
281 * 3h - CPU Disabled by BIOS (POST Error)
282 * 4h - CPU is Idle, waiting to be enabled
286 proc = SMBIOS_GET8(addr, 0x18);
287 if ((proc & 0x07) == 1)
288 smbios.enabled_sockets++;
289 if ((proc & 0x40) != 0)
290 smbios.populated_sockets++;
293 case 6: /* 3.3.7 Memory Module Information (Type 6, Obsolete) */
295 * Offset 0Ah: Enabled Size
297 * Bit 7 Bank connection
298 * 1 - Double-bank connection
299 * 0 - Single-bank connection
300 * Bit 6:0 Size (n), where 2**n is the size in MB
301 * 7Dh - Not determinable (Installed Size only)
302 * 7Eh - Module is installed, but no memory
304 * 7Fh - Not installed
306 osize = SMBIOS_GET8(addr, 0x0a) & 0x7f;
307 if (osize > 0 && osize < 22)
308 smbios.old_enabled_memory += 1 << (osize + 10);
311 case 17: /* 3.3.18 Memory Device (Type 17) */
316 * 1 - Value is in kilobytes units
317 * 0 - Value is in megabytes units
320 size = SMBIOS_GET16(addr, 0x0c);
321 if (size != 0 && size != 0xffff)
322 smbios.enabled_memory += (size & 0x8000) != 0 ?
323 (size & 0x7fff) : (size << 10);
326 default: /* skip other types */
330 /* Find structure terminator. */
331 cp = SMBIOS_GETSTR(addr);
332 while (SMBIOS_GET16(cp, 0) != 0)
339 smbios_find_struct(int type)
344 if (smbios.addr == NULL)
347 for (dmi = smbios.addr, i = 0;
348 dmi < smbios.addr + smbios.length && i < smbios.count; i++) {
349 if (SMBIOS_GET8(dmi, 0) == type)
351 /* Find structure terminator. */
352 dmi = SMBIOS_GETSTR(dmi);
353 while (SMBIOS_GET16(dmi, 0) != 0)
362 smbios_probe(const caddr_t addr)
371 /* Search signatures and validate checksums. */
372 saddr = smbios_sigsearch(addr ? addr : PTOV(SMBIOS_START),
377 smbios.length = SMBIOS_GET16(saddr, 0x16); /* Structure Table Length */
378 paddr = SMBIOS_GET32(saddr, 0x18); /* Structure Table Address */
379 smbios.count = SMBIOS_GET16(saddr, 0x1c); /* No of SMBIOS Structures */
380 smbios.ver = SMBIOS_GET8(saddr, 0x1e); /* SMBIOS BCD Revision */
382 if (smbios.ver != 0) {
383 smbios.major = smbios.ver >> 4;
384 smbios.minor = smbios.ver & 0x0f;
385 if (smbios.major > 9 || smbios.minor > 9)
388 if (smbios.ver == 0) {
389 smbios.major = SMBIOS_GET8(saddr, 0x06);/* SMBIOS Major Version */
390 smbios.minor = SMBIOS_GET8(saddr, 0x07);/* SMBIOS Minor Version */
392 smbios.ver = (smbios.major << 8) | smbios.minor;
393 smbios.addr = PTOV(paddr);
395 /* Get system information from SMBIOS */
396 info = smbios_find_struct(0x00);
398 smbios.bios_vendor = smbios_getstring(info, 0x04);
400 info = smbios_find_struct(0x01);
402 smbios.maker = smbios_getstring(info, 0x04);
403 smbios.product = smbios_getstring(info, 0x05);
408 smbios_detect(const caddr_t addr)
415 if (smbios.addr == NULL)
418 for (dmi = smbios.addr, i = 0;
419 dmi < smbios.addr + smbios.length && i < smbios.count; i++)
420 dmi = smbios_parse_table(dmi);
422 sprintf(buf, "%d.%d", smbios.major, smbios.minor);
423 setenv("smbios.version", buf, 1);
424 if (smbios.enabled_memory > 0 || smbios.old_enabled_memory > 0) {
425 sprintf(buf, "%u", smbios.enabled_memory > 0 ?
426 smbios.enabled_memory : smbios.old_enabled_memory);
427 setenv("smbios.memory.enabled", buf, 1);
429 if (smbios.enabled_sockets > 0) {
430 sprintf(buf, "%u", smbios.enabled_sockets);
431 setenv("smbios.socket.enabled", buf, 1);
433 if (smbios.populated_sockets > 0) {
434 sprintf(buf, "%u", smbios.populated_sockets);
435 setenv("smbios.socket.populated", buf, 1);
440 smbios_match_str(const char* s1, const char* s2)
442 return (s1 == NULL || (s2 != NULL && !strcmp(s1, s2)));
446 smbios_match(const char* bios_vendor, const char* maker,
449 /* XXXRP currently, only called from non-EFI. */
451 return (smbios_match_str(bios_vendor, smbios.bios_vendor) &&
452 smbios_match_str(maker, smbios.maker) &&
453 smbios_match_str(product, smbios.product));