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 #include "btxv86.h"
35 #include "libi386.h"
36
37 /*
38 * Detect SMBIOS and export information about the SMBIOS into the
39 * environment.
40 *
41 * System Management BIOS Reference Specification, v2.6 Final
42 * http://www.dmtf.org/standards/published_documents/DSP0134_2.6.0.pdf
43 */
44
45 /*
46 * 2.1.1 SMBIOS Structure Table Entry Point
47 *
48 * "On non-EFI systems, the SMBIOS Entry Point structure, described below, can
49 * be located by application software by searching for the anchor-string on
50 * paragraph (16-byte) boundaries within the physical memory address range
51 * 000F0000h to 000FFFFFh. This entry point encapsulates an intermediate anchor
52 * string that is used by some existing DMI browsers."
53 */
54 #define SMBIOS_START 0xf0000
55 #define SMBIOS_LENGTH 0x10000
56 #define SMBIOS_STEP 0x10
57 #define SMBIOS_SIG "_SM_"
58 #define SMBIOS_DMI_SIG "_DMI_"
59
60 #define SMBIOS_GET8(base, off) (*(uint8_t *)((base) + (off)))
61 #define SMBIOS_GET16(base, off) (*(uint16_t *)((base) + (off)))
62 #define SMBIOS_GET32(base, off) (*(uint32_t *)((base) + (off)))
63
64 #define SMBIOS_GETLEN(base) SMBIOS_GET8(base, 0x01)
65 #define SMBIOS_GETSTR(base) ((base) + SMBIOS_GETLEN(base))
66
67 static uint32_t smbios_enabled_memory = 0;
68 static uint32_t smbios_old_enabled_memory = 0;
69 static uint8_t smbios_enabled_sockets = 0;
70 static uint8_t smbios_populated_sockets = 0;
71
72 static uint8_t
smbios_checksum(const caddr_t addr,const uint8_t len)73 smbios_checksum(const caddr_t addr, const uint8_t len)
74 {
75 uint8_t sum;
76 int i;
77
78 for (sum = 0, i = 0; i < len; i++)
79 sum += SMBIOS_GET8(addr, i);
80 return (sum);
81 }
82
83 static caddr_t
smbios_sigsearch(const caddr_t addr,const uint32_t len)84 smbios_sigsearch(const caddr_t addr, const uint32_t len)
85 {
86 caddr_t cp;
87
88 /* Search on 16-byte boundaries. */
89 for (cp = addr; cp < addr + len; cp += SMBIOS_STEP)
90 if (strncmp(cp, SMBIOS_SIG, 4) == 0 &&
91 smbios_checksum(cp, SMBIOS_GET8(cp, 0x05)) == 0 &&
92 strncmp(cp + 0x10, SMBIOS_DMI_SIG, 5) == 0 &&
93 smbios_checksum(cp + 0x10, 0x0f) == 0)
94 return (cp);
95 return (NULL);
96 }
97
98 static void
smbios_setenv(const char * name,caddr_t addr,const int offset)99 smbios_setenv(const char *name, caddr_t addr, const int offset)
100 {
101 caddr_t cp;
102 int i, idx;
103
104 idx = SMBIOS_GET8(addr, offset);
105 if (idx != 0) {
106 cp = SMBIOS_GETSTR(addr);
107 for (i = 1; i < idx; i++)
108 cp += strlen(cp) + 1;
109 setenv(name, cp, 1);
110 }
111 }
112
113 #ifdef SMBIOS_SERIAL_NUMBERS
114
115 #define UUID_SIZE 16
116 #define UUID_TYPE uint32_t
117 #define UUID_STEP sizeof(UUID_TYPE)
118 #define UUID_ALL_BITS (UUID_SIZE / UUID_STEP)
119 #define UUID_GET(base, off) (*(UUID_TYPE *)((base) + (off)))
120
121 static void
smbios_setuuid(const char * name,const caddr_t addr,const int ver)122 smbios_setuuid(const char *name, const caddr_t addr, const int ver)
123 {
124 char uuid[37];
125 int i, ones, zeros;
126 UUID_TYPE n;
127 uint32_t f1;
128 uint16_t f2, f3;
129
130 for (i = 0, ones = 0, zeros = 0; i < UUID_SIZE; i += UUID_STEP) {
131 n = UUID_GET(addr, i) + 1;
132 if (zeros == 0 && n == 0)
133 ones++;
134 else if (ones == 0 && n == 1)
135 zeros++;
136 else
137 break;
138 }
139
140 if (ones != UUID_ALL_BITS && zeros != UUID_ALL_BITS) {
141 /*
142 * 3.3.2.1 System UUID
143 *
144 * "Although RFC 4122 recommends network byte order for all
145 * fields, the PC industry (including the ACPI, UEFI, and
146 * Microsoft specifications) has consistently used
147 * little-endian byte encoding for the first three fields:
148 * time_low, time_mid, time_hi_and_version. The same encoding,
149 * also known as wire format, should also be used for the
150 * SMBIOS representation of the UUID."
151 *
152 * Note: We use network byte order for backward compatibility
153 * unless SMBIOS version is 2.6+ or little-endian is forced.
154 */
155 #ifndef SMBIOS_LITTLE_ENDIAN_UUID
156 if (ver < 0x0206) {
157 f1 = ntohl(SMBIOS_GET32(addr, 0));
158 f2 = ntohs(SMBIOS_GET16(addr, 4));
159 f3 = ntohs(SMBIOS_GET16(addr, 6));
160 } else
161 #endif
162 {
163 f1 = le32toh(SMBIOS_GET32(addr, 0));
164 f2 = le16toh(SMBIOS_GET16(addr, 4));
165 f3 = le16toh(SMBIOS_GET16(addr, 6));
166 }
167 sprintf(uuid,
168 "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
169 f1, f2, f3, SMBIOS_GET8(addr, 8), SMBIOS_GET8(addr, 9),
170 SMBIOS_GET8(addr, 10), SMBIOS_GET8(addr, 11),
171 SMBIOS_GET8(addr, 12), SMBIOS_GET8(addr, 13),
172 SMBIOS_GET8(addr, 14), SMBIOS_GET8(addr, 15));
173 setenv(name, uuid, 1);
174 }
175 }
176
177 #undef UUID_SIZE
178 #undef UUID_TYPE
179 #undef UUID_STEP
180 #undef UUID_ALL_BITS
181 #undef UUID_GET
182
183 #endif
184
185 static caddr_t
smbios_parse_table(const caddr_t addr,const int ver)186 smbios_parse_table(const caddr_t addr, const int ver)
187 {
188 caddr_t cp;
189 int proc, size, osize, type;
190
191 type = SMBIOS_GET8(addr, 0); /* 3.1.2 Structure Header Format */
192 switch(type) {
193 case 0: /* 3.3.1 BIOS Information (Type 0) */
194 smbios_setenv("smbios.bios.vendor", addr, 0x04);
195 smbios_setenv("smbios.bios.version", addr, 0x05);
196 smbios_setenv("smbios.bios.reldate", addr, 0x08);
197 break;
198
199 case 1: /* 3.3.2 System Information (Type 1) */
200 smbios_setenv("smbios.system.maker", addr, 0x04);
201 smbios_setenv("smbios.system.product", addr, 0x05);
202 smbios_setenv("smbios.system.version", addr, 0x06);
203 #ifdef SMBIOS_SERIAL_NUMBERS
204 smbios_setenv("smbios.system.serial", addr, 0x07);
205 smbios_setuuid("smbios.system.uuid", addr + 0x08, ver);
206 #endif
207 break;
208
209 case 2: /* 3.3.3 Base Board (or Module) Information (Type 2) */
210 smbios_setenv("smbios.planar.maker", addr, 0x04);
211 smbios_setenv("smbios.planar.product", addr, 0x05);
212 smbios_setenv("smbios.planar.version", addr, 0x06);
213 #ifdef SMBIOS_SERIAL_NUMBERS
214 smbios_setenv("smbios.planar.serial", addr, 0x07);
215 #endif
216 break;
217
218 case 3: /* 3.3.4 System Enclosure or Chassis (Type 3) */
219 smbios_setenv("smbios.chassis.maker", addr, 0x04);
220 smbios_setenv("smbios.chassis.version", addr, 0x06);
221 #ifdef SMBIOS_SERIAL_NUMBERS
222 smbios_setenv("smbios.chassis.serial", addr, 0x07);
223 smbios_setenv("smbios.chassis.tag", addr, 0x08);
224 #endif
225 break;
226
227 case 4: /* 3.3.5 Processor Information (Type 4) */
228 /*
229 * Offset 18h: Processor Status
230 *
231 * Bit 7 Reserved, must be 0
232 * Bit 6 CPU Socket Populated
233 * 1 - CPU Socket Populated
234 * 0 - CPU Socket Unpopulated
235 * Bit 5:3 Reserved, must be zero
236 * Bit 2:0 CPU Status
237 * 0h - Unknown
238 * 1h - CPU Enabled
239 * 2h - CPU Disabled by User via BIOS Setup
240 * 3h - CPU Disabled by BIOS (POST Error)
241 * 4h - CPU is Idle, waiting to be enabled
242 * 5-6h - Reserved
243 * 7h - Other
244 */
245 proc = SMBIOS_GET8(addr, 0x18);
246 if ((proc & 0x07) == 1)
247 smbios_enabled_sockets++;
248 if ((proc & 0x40) != 0)
249 smbios_populated_sockets++;
250 break;
251
252 case 6: /* 3.3.7 Memory Module Information (Type 6, Obsolete) */
253 /*
254 * Offset 0Ah: Enabled Size
255 *
256 * Bit 7 Bank connection
257 * 1 - Double-bank connection
258 * 0 - Single-bank connection
259 * Bit 6:0 Size (n), where 2**n is the size in MB
260 * 7Dh - Not determinable (Installed Size only)
261 * 7Eh - Module is installed, but no memory
262 * has been enabled
263 * 7Fh - Not installed
264 */
265 osize = SMBIOS_GET8(addr, 0x0a) & 0x7f;
266 if (osize > 0 && osize < 22)
267 smbios_old_enabled_memory += 1 << (osize + 10);
268 break;
269
270 case 17: /* 3.3.18 Memory Device (Type 17) */
271 /*
272 * Offset 0Ch: Size
273 *
274 * Bit 15 Granularity
275 * 1 - Value is in kilobytes units
276 * 0 - Value is in megabytes units
277 * Bit 14:0 Size
278 */
279 size = SMBIOS_GET16(addr, 0x0c);
280 if (size != 0 && size != 0xffff)
281 smbios_enabled_memory += (size & 0x8000) != 0 ?
282 (size & 0x7fff) : (size << 10);
283 break;
284
285 default: /* skip other types */
286 break;
287 }
288
289 /* Find structure terminator. */
290 cp = SMBIOS_GETSTR(addr);
291 while (SMBIOS_GET16(cp, 0) != 0)
292 cp++;
293
294 return (cp + 2);
295 }
296
297 void
smbios_detect(void)298 smbios_detect(void)
299 {
300 char buf[16];
301 caddr_t addr, dmi, smbios;
302 size_t count, length;
303 uint32_t paddr;
304 int i, major, minor, ver;
305
306 /* Search signatures and validate checksums. */
307 smbios = smbios_sigsearch(PTOV(SMBIOS_START), SMBIOS_LENGTH);
308 if (smbios == NULL)
309 return;
310
311 length = SMBIOS_GET16(smbios, 0x16); /* Structure Table Length */
312 paddr = SMBIOS_GET32(smbios, 0x18); /* Structure Table Address */
313 count = SMBIOS_GET16(smbios, 0x1c); /* No of SMBIOS Structures */
314 ver = SMBIOS_GET8(smbios, 0x1e); /* SMBIOS BCD Revision */
315
316 if (ver != 0) {
317 major = ver >> 4;
318 minor = ver & 0x0f;
319 if (major > 9 || minor > 9)
320 ver = 0;
321 }
322 if (ver == 0) {
323 major = SMBIOS_GET8(smbios, 0x06); /* SMBIOS Major Version */
324 minor = SMBIOS_GET8(smbios, 0x07); /* SMBIOS Minor Version */
325 }
326 ver = (major << 8) | minor;
327
328 addr = PTOV(paddr);
329 for (dmi = addr, i = 0; dmi < addr + length && i < count; i++)
330 dmi = smbios_parse_table(dmi, ver);
331
332 sprintf(buf, "%d.%d", major, minor);
333 setenv("smbios.version", buf, 1);
334 if (smbios_enabled_memory > 0 || smbios_old_enabled_memory > 0) {
335 sprintf(buf, "%u", smbios_enabled_memory > 0 ?
336 smbios_enabled_memory : smbios_old_enabled_memory);
337 setenv("smbios.memory.enabled", buf, 1);
338 }
339 if (smbios_enabled_sockets > 0) {
340 sprintf(buf, "%u", smbios_enabled_sockets);
341 setenv("smbios.socket.enabled", buf, 1);
342 }
343 if (smbios_populated_sockets > 0) {
344 sprintf(buf, "%u", smbios_populated_sockets);
345 setenv("smbios.socket.populated", buf, 1);
346 }
347 }
348