1 /*-
2 * Copyright (c) 1992 Terrence R. Lambert.
3 * Copyright (c) 1982, 1987, 1990 The Regents of the University of California.
4 * Copyright (c) 1997 KATO Takenori.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * William Jolitz.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * from: Id: machdep.c,v 1.193 1996/06/18 01:22:04 bde Exp
39 */
40
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
43
44 #include "opt_cpu.h"
45
46 #include <sys/param.h>
47 #include <sys/bus.h>
48 #include <sys/cpu.h>
49 #include <sys/eventhandler.h>
50 #include <sys/systm.h>
51 #include <sys/kernel.h>
52 #include <sys/sysctl.h>
53 #include <sys/power.h>
54
55 #include <machine/asmacros.h>
56 #include <machine/clock.h>
57 #include <machine/cputypes.h>
58 #include <machine/frame.h>
59 #include <machine/intr_machdep.h>
60 #include <machine/segments.h>
61 #include <machine/specialreg.h>
62 #include <machine/md_var.h>
63
64 #include <amd64/isa/icu.h>
65
66 /* XXX - should be in header file: */
67 void printcpuinfo(void);
68 void identify_cpu(void);
69 void earlysetcpuclass(void);
70 void panicifcpuunsupported(void);
71
72 static void print_AMD_info(void);
73 static void print_AMD_assoc(int i);
74 void setPQL2(int *const size, int *const ways);
75 static void setPQL2_AMD(int *const size, int *const ways);
76
77 int cpu_class;
78 char machine[] = "amd64";
79 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD,
80 machine, 0, "Machine class");
81
82 static char cpu_model[128];
83 SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD,
84 cpu_model, 0, "Machine model");
85
86 static int hw_clockrate;
87 SYSCTL_INT(_hw, OID_AUTO, clockrate, CTLFLAG_RD,
88 &hw_clockrate, 0, "CPU instruction clock rate");
89
90 static char cpu_brand[48];
91
92 static struct {
93 char *cpu_name;
94 int cpu_class;
95 } amd64_cpus[] = {
96 { "Clawhammer", CPUCLASS_K8 }, /* CPU_CLAWHAMMER */
97 { "Sledgehammer", CPUCLASS_K8 }, /* CPU_SLEDGEHAMMER */
98 };
99
100 extern int pq_l2size;
101 extern int pq_l2nways;
102
103 void
104 printcpuinfo(void)
105 {
106 u_int regs[4], i;
107 char *brand;
108
109 cpu_class = amd64_cpus[cpu].cpu_class;
110 printf("CPU: ");
111 strncpy(cpu_model, amd64_cpus[cpu].cpu_name, sizeof (cpu_model));
112
113 /* Check for extended CPUID information and a processor name. */
114 if (cpu_exthigh >= 0x80000004) {
115 brand = cpu_brand;
116 for (i = 0x80000002; i < 0x80000005; i++) {
117 do_cpuid(i, regs);
118 memcpy(brand, regs, sizeof(regs));
119 brand += sizeof(regs);
120 }
121 }
122
123 if (strcmp(cpu_vendor, "GenuineIntel") == 0) {
124 /* Please make up your mind folks! */
125 strcat(cpu_model, "EM64T");
126 } else if (strcmp(cpu_vendor, "AuthenticAMD") == 0) {
127 /*
128 * Values taken from AMD Processor Recognition
129 * http://www.amd.com/K6/k6docs/pdf/20734g.pdf
130 * (also describes ``Features'' encodings.
131 */
132 strcpy(cpu_model, "AMD ");
133 switch (cpu_id & 0xF00) {
134 case 0xf00:
135 strcat(cpu_model, "AMD64 Processor");
136 break;
137 default:
138 strcat(cpu_model, "Unknown");
139 break;
140 }
141 }
142
143 /*
144 * Replace cpu_model with cpu_brand minus leading spaces if
145 * we have one.
146 */
147 brand = cpu_brand;
148 while (*brand == ' ')
149 ++brand;
150 if (*brand != '\0')
151 strcpy(cpu_model, brand);
152
153 printf("%s (", cpu_model);
154 switch(cpu_class) {
155 case CPUCLASS_K8:
156 hw_clockrate = (tsc_freq + 5000) / 1000000;
157 printf("%jd.%02d-MHz ",
158 (intmax_t)(tsc_freq + 4999) / 1000000,
159 (u_int)((tsc_freq + 4999) / 10000) % 100);
160 printf("K8");
161 break;
162 default:
163 printf("Unknown"); /* will panic below... */
164 }
165 printf("-class CPU)\n");
166 if(*cpu_vendor)
167 printf(" Origin = \"%s\"",cpu_vendor);
168 if(cpu_id)
169 printf(" Id = 0x%x", cpu_id);
170
171 if (strcmp(cpu_vendor, "GenuineIntel") == 0 ||
172 strcmp(cpu_vendor, "AuthenticAMD") == 0) {
173 printf(" Stepping = %u", cpu_id & 0xf);
174 if (cpu_high > 0) {
175 u_int cmp = 1, htt = 1;
176
177 /*
178 * Here we should probably set up flags indicating
179 * whether or not various features are available.
180 * The interesting ones are probably VME, PSE, PAE,
181 * and PGE. The code already assumes without bothering
182 * to check that all CPUs >= Pentium have a TSC and
183 * MSRs.
184 */
185 printf("\n Features=0x%b", cpu_feature,
186 "\020"
187 "\001FPU" /* Integral FPU */
188 "\002VME" /* Extended VM86 mode support */
189 "\003DE" /* Debugging Extensions (CR4.DE) */
190 "\004PSE" /* 4MByte page tables */
191 "\005TSC" /* Timestamp counter */
192 "\006MSR" /* Machine specific registers */
193 "\007PAE" /* Physical address extension */
194 "\010MCE" /* Machine Check support */
195 "\011CX8" /* CMPEXCH8 instruction */
196 "\012APIC" /* SMP local APIC */
197 "\013oldMTRR" /* Previous implementation of MTRR */
198 "\014SEP" /* Fast System Call */
199 "\015MTRR" /* Memory Type Range Registers */
200 "\016PGE" /* PG_G (global bit) support */
201 "\017MCA" /* Machine Check Architecture */
202 "\020CMOV" /* CMOV instruction */
203 "\021PAT" /* Page attributes table */
204 "\022PSE36" /* 36 bit address space support */
205 "\023PN" /* Processor Serial number */
206 "\024CLFLUSH" /* Has the CLFLUSH instruction */
207 "\025<b20>"
208 "\026DTS" /* Debug Trace Store */
209 "\027ACPI" /* ACPI support */
210 "\030MMX" /* MMX instructions */
211 "\031FXSR" /* FXSAVE/FXRSTOR */
212 "\032SSE" /* Streaming SIMD Extensions */
213 "\033SSE2" /* Streaming SIMD Extensions #2 */
214 "\034SS" /* Self snoop */
215 "\035HTT" /* Hyperthreading (see EBX bit 16-23) */
216 "\036TM" /* Thermal Monitor clock slowdown */
217 "\037IA64" /* CPU can execute IA64 instructions */
218 "\040PBE" /* Pending Break Enable */
219 );
220
221 if (cpu_feature2 != 0) {
222 printf("\n Features2=0x%b", cpu_feature2,
223 "\020"
224 "\001SSE3" /* SSE3 */
225 "\002<b1>"
226 "\003RSVD2" /* "Reserved" bit 2 */
227 "\004MON" /* MONITOR/MWAIT Instructions */
228 "\005DS_CPL" /* CPL Qualified Debug Store */
229 "\006VMX" /* Virtual Machine Extensions */
230 "\007SMX" /* Safer Mode Extensions */
231 "\010EST" /* Enhanced SpeedStep */
232 "\011TM2" /* Thermal Monitor 2 */
233 "\012SSSE3" /* SSSE3 */
234 "\013CNXT-ID" /* L1 context ID available */
235 "\014<b11>"
236 "\015<b12>"
237 "\016CX16" /* CMPXCHG16B Instruction */
238 "\017xTPR" /* Send Task Priority Messages*/
239 "\020PDCM" /* Perf/Debug Capability MSR */
240 "\021<b16>"
241 "\022<b17>"
242 "\023DCA" /* Direct Cache Access */
243 "\024<b19>"
244 "\025<b20>"
245 "\026<b21>"
246 "\027<b22>"
247 "\030<b23>"
248 "\031<b24>"
249 "\032<b25>"
250 "\033<b26>"
251 "\034<b27>"
252 "\035<b28>"
253 "\036<b29>"
254 "\037<b30>"
255 "\040<b31>"
256 );
257 }
258
259 /*
260 * AMD64 Architecture Programmer's Manual Volume 3:
261 * General-Purpose and System Instructions
262 * http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/24594.pdf
263 *
264 * IA-32 Intel Architecture Software Developer's Manual,
265 * Volume 2A: Instruction Set Reference, A-M
266 * ftp://download.intel.com/design/Pentium4/manuals/25366617.pdf
267 */
268 if (amd_feature != 0) {
269 printf("\n AMD Features=0x%b", amd_feature,
270 "\020" /* in hex */
271 "\001<s0>" /* Same */
272 "\002<s1>" /* Same */
273 "\003<s2>" /* Same */
274 "\004<s3>" /* Same */
275 "\005<s4>" /* Same */
276 "\006<s5>" /* Same */
277 "\007<s6>" /* Same */
278 "\010<s7>" /* Same */
279 "\011<s8>" /* Same */
280 "\012<s9>" /* Same */
281 "\013<b10>" /* Undefined */
282 "\014SYSCALL" /* Have SYSCALL/SYSRET */
283 "\015<s12>" /* Same */
284 "\016<s13>" /* Same */
285 "\017<s14>" /* Same */
286 "\020<s15>" /* Same */
287 "\021<s16>" /* Same */
288 "\022<s17>" /* Same */
289 "\023<b18>" /* Reserved, unknown */
290 "\024MP" /* Multiprocessor Capable */
291 "\025NX" /* Has EFER.NXE, NX */
292 "\026<b21>" /* Undefined */
293 "\027MMX+" /* AMD MMX Extensions */
294 "\030<s23>" /* Same */
295 "\031<s24>" /* Same */
296 "\032FFXSR" /* Fast FXSAVE/FXRSTOR */
297 "\033<b26>" /* Undefined */
298 "\034RDTSCP" /* RDTSCP */
299 "\035<b28>" /* Undefined */
300 "\036LM" /* 64 bit long mode */
301 "\0373DNow!+" /* AMD 3DNow! Extensions */
302 "\0403DNow!" /* AMD 3DNow! */
303 );
304 }
305
306 if (amd_feature2 != 0) {
307 printf("\n AMD Features2=0x%b", amd_feature2,
308 "\020"
309 "\001LAHF" /* LAHF/SAHF in long mode */
310 "\002CMP" /* CMP legacy */
311 "\003SVM" /* Secure Virtual Mode */
312 "\004ExtAPIC" /* Extended APIC register */
313 "\005CR8" /* CR8 in legacy mode */
314 "\006<b5>"
315 "\007<b6>"
316 "\010<b7>"
317 "\011Prefetch" /* 3DNow! Prefetch/PrefetchW */
318 "\012<b9>"
319 "\013<b10>"
320 "\014<b11>"
321 "\015<b12>"
322 "\016<b13>"
323 "\017<b14>"
324 "\020<b15>"
325 "\021<b16>"
326 "\022<b17>"
327 "\023<b18>"
328 "\024<b19>"
329 "\025<b20>"
330 "\026<b21>"
331 "\027<b22>"
332 "\030<b23>"
333 "\031<b24>"
334 "\032<b25>"
335 "\033<b26>"
336 "\034<b27>"
337 "\035<b28>"
338 "\036<b29>"
339 "\037<b30>"
340 "\040<b31>"
341 );
342 }
343
344 if (cpu_feature & CPUID_HTT && strcmp(cpu_vendor,
345 "AuthenticAMD") == 0)
346 cpu_feature &= ~CPUID_HTT;
347
348 /*
349 * If this CPU supports HTT or CMP then mention the
350 * number of physical/logical cores it contains.
351 */
352 if (cpu_feature & CPUID_HTT)
353 htt = (cpu_procinfo & CPUID_HTT_CORES) >> 16;
354 if (strcmp(cpu_vendor, "AuthenticAMD") == 0 &&
355 (amd_feature2 & AMDID2_CMP))
356 cmp = (cpu_procinfo2 & AMDID_CMP_CORES) + 1;
357 else if (strcmp(cpu_vendor, "GenuineIntel") == 0 &&
358 (cpu_high >= 4)) {
359 cpuid_count(4, 0, regs);
360 if ((regs[0] & 0x1f) != 0)
361 cmp = ((regs[0] >> 26) & 0x3f) + 1;
362 }
363 if (cmp > 1)
364 printf("\n Cores per package: %d", cmp);
365 if ((htt / cmp) > 1)
366 printf("\n Logical CPUs per core: %d",
367 htt / cmp);
368 }
369 }
370 /* Avoid ugly blank lines: only print newline when we have to. */
371 if (*cpu_vendor || cpu_id)
372 printf("\n");
373
374 if (!bootverbose)
375 return;
376
377 if (strcmp(cpu_vendor, "AuthenticAMD") == 0)
378 print_AMD_info();
379 }
380
381 void
382 panicifcpuunsupported(void)
383 {
384
385 #ifndef HAMMER
386 #error "You need to specify a cpu type"
387 #endif
388 /*
389 * Now that we have told the user what they have,
390 * let them know if that machine type isn't configured.
391 */
392 switch (cpu_class) {
393 case CPUCLASS_X86:
394 #ifndef HAMMER
395 case CPUCLASS_K8:
396 #endif
397 panic("CPU class not configured");
398 default:
399 break;
400 }
401 }
402
403
404 /* Update TSC freq with the value indicated by the caller. */
405 static void
406 tsc_freq_changed(void *arg, const struct cf_level *level, int status)
407 {
408 /* If there was an error during the transition, don't do anything. */
409 if (status != 0)
410 return;
411
412 /* Total setting for this level gives the new frequency in MHz. */
413 hw_clockrate = level->total_set.freq;
414 }
415
416 EVENTHANDLER_DEFINE(cpufreq_post_change, tsc_freq_changed, NULL,
417 EVENTHANDLER_PRI_ANY);
418
419 /*
420 * Final stage of CPU identification. -- Should I check TI?
421 */
422 void
423 identify_cpu(void)
424 {
425 u_int regs[4];
426
427 do_cpuid(0, regs);
428 cpu_high = regs[0];
429 ((u_int *)&cpu_vendor)[0] = regs[1];
430 ((u_int *)&cpu_vendor)[1] = regs[3];
431 ((u_int *)&cpu_vendor)[2] = regs[2];
432 cpu_vendor[12] = '\0';
433
434 do_cpuid(1, regs);
435 cpu_id = regs[0];
436 cpu_procinfo = regs[1];
437 cpu_feature = regs[3];
438 cpu_feature2 = regs[2];
439
440 if (strcmp(cpu_vendor, "GenuineIntel") == 0 ||
441 strcmp(cpu_vendor, "AuthenticAMD") == 0) {
442 do_cpuid(0x80000000, regs);
443 cpu_exthigh = regs[0];
444 }
445 if (cpu_exthigh >= 0x80000001) {
446 do_cpuid(0x80000001, regs);
447 amd_feature = regs[3] & ~(cpu_feature & 0x0183f3ff);
448 amd_feature2 = regs[2];
449 }
450 if (cpu_exthigh >= 0x80000008) {
451 do_cpuid(0x80000008, regs);
452 cpu_procinfo2 = regs[2];
453 }
454
455 /* XXX */
456 cpu = CPU_CLAWHAMMER;
457 }
458
459 static void
460 print_AMD_assoc(int i)
461 {
462 if (i == 255)
463 printf(", fully associative\n");
464 else
465 printf(", %d-way associative\n", i);
466 }
467
468 static void
469 print_AMD_l2_assoc(int i)
470 {
471 switch (i & 0x0f) {
472 case 0: printf(", disabled/not present\n"); break;
473 case 1: printf(", direct mapped\n"); break;
474 case 2: printf(", 2-way associative\n"); break;
475 case 4: printf(", 4-way associative\n"); break;
476 case 6: printf(", 8-way associative\n"); break;
477 case 8: printf(", 16-way associative\n"); break;
478 case 15: printf(", fully associative\n"); break;
479 default: printf(", reserved configuration\n"); break;
480 }
481 }
482
483 static void
484 print_AMD_info(void)
485 {
486 u_int regs[4];
487
488 if (cpu_exthigh < 0x80000005)
489 return;
490
491 do_cpuid(0x80000005, regs);
492 printf("L1 2MB data TLB: %d entries", (regs[0] >> 16) & 0xff);
493 print_AMD_assoc(regs[0] >> 24);
494
495 printf("L1 2MB instruction TLB: %d entries", regs[0] & 0xff);
496 print_AMD_assoc((regs[0] >> 8) & 0xff);
497
498 printf("L1 4KB data TLB: %d entries", (regs[1] >> 16) & 0xff);
499 print_AMD_assoc(regs[1] >> 24);
500
501 printf("L1 4KB instruction TLB: %d entries", regs[1] & 0xff);
502 print_AMD_assoc((regs[1] >> 8) & 0xff);
503
504 printf("L1 data cache: %d kbytes", regs[2] >> 24);
505 printf(", %d bytes/line", regs[2] & 0xff);
506 printf(", %d lines/tag", (regs[2] >> 8) & 0xff);
507 print_AMD_assoc((regs[2] >> 16) & 0xff);
508
509 printf("L1 instruction cache: %d kbytes", regs[3] >> 24);
510 printf(", %d bytes/line", regs[3] & 0xff);
511 printf(", %d lines/tag", (regs[3] >> 8) & 0xff);
512 print_AMD_assoc((regs[3] >> 16) & 0xff);
513
514 if (cpu_exthigh >= 0x80000006) {
515 do_cpuid(0x80000006, regs);
516 if ((regs[0] >> 16) != 0) {
517 printf("L2 2MB data TLB: %d entries",
518 (regs[0] >> 16) & 0xfff);
519 print_AMD_l2_assoc(regs[0] >> 28);
520 printf("L2 2MB instruction TLB: %d entries",
521 regs[0] & 0xfff);
522 print_AMD_l2_assoc((regs[0] >> 28) & 0xf);
523 } else {
524 printf("L2 2MB unified TLB: %d entries",
525 regs[0] & 0xfff);
526 print_AMD_l2_assoc((regs[0] >> 28) & 0xf);
527 }
528 if ((regs[1] >> 16) != 0) {
529 printf("L2 4KB data TLB: %d entries",
530 (regs[1] >> 16) & 0xfff);
531 print_AMD_l2_assoc(regs[1] >> 28);
532
533 printf("L2 4KB instruction TLB: %d entries",
534 (regs[1] >> 16) & 0xfff);
535 print_AMD_l2_assoc((regs[1] >> 28) & 0xf);
536 } else {
537 printf("L2 4KB unified TLB: %d entries",
538 (regs[1] >> 16) & 0xfff);
539 print_AMD_l2_assoc((regs[1] >> 28) & 0xf);
540 }
541 printf("L2 unified cache: %d kbytes", regs[2] >> 16);
542 printf(", %d bytes/line", regs[2] & 0xff);
543 printf(", %d lines/tag", (regs[2] >> 8) & 0x0f);
544 print_AMD_l2_assoc((regs[2] >> 12) & 0x0f);
545 }
546 }
547
548 static void
549 setPQL2_AMD(int *const size, int *const ways)
550 {
551 if (cpu_exthigh >= 0x80000006) {
552 u_int regs[4];
553
554 do_cpuid(0x80000006, regs);
555 *size = regs[2] >> 16;
556 *ways = (regs[2] >> 12) & 0x0f;
557 switch (*ways) {
558 case 0: /* disabled/not present */
559 case 15: /* fully associative */
560 default: *ways = 1; break; /* reserved configuration */
561 case 4: *ways = 4; break;
562 case 6: *ways = 8; break;
563 case 8: *ways = 16; break;
564 }
565 }
566 }
567
568 void
569 setPQL2(int *const size, int *const ways)
570 {
571 if (strcmp(cpu_vendor, "AuthenticAMD") == 0)
572 setPQL2_AMD(size, ways);
573 }
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