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 */
49
50 /*
51 * 2.1.1 SMBIOS Structure Table Entry Point
52 *
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."
58 */
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_"
64
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)))
68
69 #define SMBIOS_GETLEN(base) SMBIOS_GET8(base, 0x01)
70 #define SMBIOS_GETSTR(base) ((base) + SMBIOS_GETLEN(base))
71
72 struct smbios_attr {
73 int probed;
74 caddr_t addr;
75 size_t length;
76 size_t count;
77 int major;
78 int minor;
79 int ver;
80 const char* bios_vendor;
81 const char* maker;
82 const char* product;
83 uint32_t enabled_memory;
84 uint32_t old_enabled_memory;
85 uint8_t enabled_sockets;
86 uint8_t populated_sockets;
87 };
88
89 static struct smbios_attr smbios;
90
91 static uint8_t
smbios_checksum(const caddr_t addr,const uint8_t len)92 smbios_checksum(const caddr_t addr, const uint8_t len)
93 {
94 uint8_t sum;
95 int i;
96
97 for (sum = 0, i = 0; i < len; i++)
98 sum += SMBIOS_GET8(addr, i);
99 return (sum);
100 }
101
102 static caddr_t
smbios_sigsearch(const caddr_t addr,const uint32_t len)103 smbios_sigsearch(const caddr_t addr, const uint32_t len)
104 {
105 caddr_t cp;
106
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)
113 return (cp);
114 return (NULL);
115 }
116
117 static const char*
smbios_getstring(caddr_t addr,const int offset)118 smbios_getstring(caddr_t addr, const int offset)
119 {
120 caddr_t cp;
121 int i, idx;
122
123 idx = SMBIOS_GET8(addr, offset);
124 if (idx != 0) {
125 cp = SMBIOS_GETSTR(addr);
126 for (i = 1; i < idx; i++)
127 cp += strlen(cp) + 1;
128 return cp;
129 }
130 return (NULL);
131 }
132
133 static void
smbios_setenv(const char * name,caddr_t addr,const int offset)134 smbios_setenv(const char *name, caddr_t addr, const int offset)
135 {
136 const char* val;
137
138 val = smbios_getstring(addr, offset);
139 if (val != NULL)
140 setenv(name, val, 1);
141 }
142
143 #ifdef SMBIOS_SERIAL_NUMBERS
144
145 #define UUID_SIZE 16
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)))
150
151 static void
smbios_setuuid(const char * name,const caddr_t addr,const int ver)152 smbios_setuuid(const char *name, const caddr_t addr, const int ver)
153 {
154 char uuid[37];
155 int byteorder, i, ones, zeros;
156 UUID_TYPE n;
157 uint32_t f1;
158 uint16_t f2, f3;
159
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)
163 ones++;
164 else if (ones == 0 && n == 1)
165 zeros++;
166 else
167 break;
168 }
169
170 if (ones != UUID_ALL_BITS && zeros != UUID_ALL_BITS) {
171 /*
172 * 3.3.2.1 System UUID
173 *
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."
181 *
182 * Note: We use network byte order for backward compatibility
183 * unless SMBIOS version is 2.6+ or little-endian is forced.
184 */
185 #if defined(SMBIOS_LITTLE_ENDIAN_UUID)
186 byteorder = LITTLE_ENDIAN;
187 #elif defined(SMBIOS_NETWORK_ENDIAN_UUID)
188 byteorder = BIG_ENDIAN;
189 #else
190 byteorder = ver < 0x0206 ? BIG_ENDIAN : LITTLE_ENDIAN;
191 #endif
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));
196 } else {
197 f1 = le32toh(SMBIOS_GET32(addr, 0));
198 f2 = le16toh(SMBIOS_GET16(addr, 4));
199 f3 = le16toh(SMBIOS_GET16(addr, 6));
200 }
201 sprintf(uuid,
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);
208 }
209 }
210
211 #undef UUID_SIZE
212 #undef UUID_TYPE
213 #undef UUID_STEP
214 #undef UUID_ALL_BITS
215 #undef UUID_GET
216
217 #endif
218
219 static caddr_t
smbios_parse_table(const caddr_t addr)220 smbios_parse_table(const caddr_t addr)
221 {
222 caddr_t cp;
223 int proc, size, osize, type;
224
225 type = SMBIOS_GET8(addr, 0); /* 3.1.2 Structure Header Format */
226 switch(type) {
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);
231 break;
232
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);
240 #endif
241 break;
242
243 case 2: /* 3.3.3 Base Board (or Module) Information (Type 2) */
244 smbios_setenv("smbios.planar.maker", addr, 0x04);
245 smbios_setenv("smbios.planar.product", addr, 0x05);
246 smbios_setenv("smbios.planar.version", addr, 0x06);
247 #ifdef SMBIOS_SERIAL_NUMBERS
248 smbios_setenv("smbios.planar.serial", addr, 0x07);
249 #endif
250 break;
251
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);
258 #endif
259 break;
260
261 case 4: /* 3.3.5 Processor Information (Type 4) */
262 /*
263 * Offset 18h: Processor Status
264 *
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
270 * Bit 2:0 CPU Status
271 * 0h - Unknown
272 * 1h - CPU Enabled
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
276 * 5-6h - Reserved
277 * 7h - Other
278 */
279 proc = SMBIOS_GET8(addr, 0x18);
280 if ((proc & 0x07) == 1)
281 smbios.enabled_sockets++;
282 if ((proc & 0x40) != 0)
283 smbios.populated_sockets++;
284 break;
285
286 case 6: /* 3.3.7 Memory Module Information (Type 6, Obsolete) */
287 /*
288 * Offset 0Ah: Enabled Size
289 *
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
296 * has been enabled
297 * 7Fh - Not installed
298 */
299 osize = SMBIOS_GET8(addr, 0x0a) & 0x7f;
300 if (osize > 0 && osize < 22)
301 smbios.old_enabled_memory += 1 << (osize + 10);
302 break;
303
304 case 17: /* 3.3.18 Memory Device (Type 17) */
305 /*
306 * Offset 0Ch: Size
307 *
308 * Bit 15 Granularity
309 * 1 - Value is in kilobytes units
310 * 0 - Value is in megabytes units
311 * Bit 14:0 Size
312 */
313 size = SMBIOS_GET16(addr, 0x0c);
314 if (size != 0 && size != 0xffff)
315 smbios.enabled_memory += (size & 0x8000) != 0 ?
316 (size & 0x7fff) : (size << 10);
317 break;
318
319 default: /* skip other types */
320 break;
321 }
322
323 /* Find structure terminator. */
324 cp = SMBIOS_GETSTR(addr);
325 while (SMBIOS_GET16(cp, 0) != 0)
326 cp++;
327
328 return (cp + 2);
329 }
330
331 static caddr_t
smbios_find_struct(int type)332 smbios_find_struct(int type)
333 {
334 caddr_t dmi;
335 int i;
336
337 if (smbios.addr == NULL)
338 return (NULL);
339
340 for (dmi = smbios.addr, i = 0;
341 dmi < smbios.addr + smbios.length && i < smbios.count; i++) {
342 if (SMBIOS_GET8(dmi, 0) == type)
343 return dmi;
344 /* Find structure terminator. */
345 dmi = SMBIOS_GETSTR(dmi);
346 while (SMBIOS_GET16(dmi, 0) != 0)
347 dmi++;
348 dmi += 2;
349 }
350
351 return (NULL);
352 }
353
354 static void
smbios_probe(const caddr_t addr)355 smbios_probe(const caddr_t addr)
356 {
357 caddr_t saddr, info;
358 uintptr_t paddr;
359
360 if (smbios.probed)
361 return;
362 smbios.probed = 1;
363
364 /* Search signatures and validate checksums. */
365 saddr = smbios_sigsearch(addr ? addr : PTOV(SMBIOS_START),
366 SMBIOS_LENGTH);
367 if (saddr == NULL)
368 return;
369
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 */
374
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)
379 smbios.ver = 0;
380 }
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 */
384 }
385 smbios.ver = (smbios.major << 8) | smbios.minor;
386 smbios.addr = PTOV(paddr);
387
388 /* Get system information from SMBIOS */
389 info = smbios_find_struct(0x00);
390 if (info != NULL) {
391 smbios.bios_vendor = smbios_getstring(info, 0x04);
392 }
393 info = smbios_find_struct(0x01);
394 if (info != NULL) {
395 smbios.maker = smbios_getstring(info, 0x04);
396 smbios.product = smbios_getstring(info, 0x05);
397 }
398 }
399
400 void
smbios_detect(const caddr_t addr)401 smbios_detect(const caddr_t addr)
402 {
403 char buf[16];
404 caddr_t dmi;
405 int i;
406
407 smbios_probe(addr);
408 if (smbios.addr == NULL)
409 return;
410
411 for (dmi = smbios.addr, i = 0;
412 dmi < smbios.addr + smbios.length && i < smbios.count; i++)
413 dmi = smbios_parse_table(dmi);
414
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);
421 }
422 if (smbios.enabled_sockets > 0) {
423 sprintf(buf, "%u", smbios.enabled_sockets);
424 setenv("smbios.socket.enabled", buf, 1);
425 }
426 if (smbios.populated_sockets > 0) {
427 sprintf(buf, "%u", smbios.populated_sockets);
428 setenv("smbios.socket.populated", buf, 1);
429 }
430 }
431
432 static int
smbios_match_str(const char * s1,const char * s2)433 smbios_match_str(const char* s1, const char* s2)
434 {
435 return (s1 == NULL || (s2 != NULL && !strcmp(s1, s2)));
436 }
437
438 int
smbios_match(const char * bios_vendor,const char * maker,const char * product)439 smbios_match(const char* bios_vendor, const char* maker,
440 const char* product)
441 {
442 /* XXXRP currently, only called from non-EFI. */
443 smbios_probe(NULL);
444 return (smbios_match_str(bios_vendor, smbios.bios_vendor) &&
445 smbios_match_str(maker, smbios.maker) &&
446 smbios_match_str(product, smbios.product));
447 }
448