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sys/i386/i386/identcpu.c
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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: releng/6.1/sys/i386/i386/identcpu.c 157998 2006-04-24 18:24:31Z jkim $"); 43 44 #include "opt_cpu.h" 45 46 #include <sys/param.h> 47 #include <sys/bus.h> 48 #include <sys/systm.h> 49 #include <sys/kernel.h> 50 #include <sys/sysctl.h> 51 #include <sys/power.h> 52 53 #include <machine/asmacros.h> 54 #include <machine/clock.h> 55 #include <machine/cputypes.h> 56 #include <machine/intr_machdep.h> 57 #include <machine/md_var.h> 58 #include <machine/segments.h> 59 #include <machine/specialreg.h> 60 61 #define IDENTBLUE_CYRIX486 0 62 #define IDENTBLUE_IBMCPU 1 63 #define IDENTBLUE_CYRIXM2 2 64 65 /* XXX - should be in header file: */ 66 void printcpuinfo(void); 67 void finishidentcpu(void); 68 void earlysetcpuclass(void); 69 #if defined(I586_CPU) && defined(CPU_WT_ALLOC) 70 void enable_K5_wt_alloc(void); 71 void enable_K6_wt_alloc(void); 72 void enable_K6_2_wt_alloc(void); 73 #endif 74 void panicifcpuunsupported(void); 75 76 static void identifycyrix(void); 77 static void print_AMD_info(void); 78 static void print_AMD_assoc(int i); 79 static void print_transmeta_info(void); 80 81 int cpu_class; 82 u_int cpu_exthigh; /* Highest arg to extended CPUID */ 83 u_int cyrix_did; /* Device ID of Cyrix CPU */ 84 char machine[] = "i386"; 85 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, 86 machine, 0, "Machine class"); 87 88 static char cpu_model[128]; 89 SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, 90 cpu_model, 0, "Machine model"); 91 92 static int hw_clockrate; 93 SYSCTL_INT(_hw, OID_AUTO, clockrate, CTLFLAG_RD, 94 &hw_clockrate, 0, "CPU instruction clock rate"); 95 96 #if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU) 97 static char cpu_brand[48]; 98 99 #define MAX_BRAND_INDEX 8 100 101 static const char *cpu_brandtable[MAX_BRAND_INDEX + 1] = { 102 NULL, /* No brand */ 103 "Intel Celeron", 104 "Intel Pentium III", 105 "Intel Pentium III Xeon", 106 NULL, 107 NULL, 108 NULL, 109 NULL, 110 "Intel Pentium 4" 111 }; 112 #endif 113 114 static struct { 115 char *cpu_name; 116 int cpu_class; 117 } i386_cpus[] = { 118 { "Intel 80286", CPUCLASS_286 }, /* CPU_286 */ 119 { "i386SX", CPUCLASS_386 }, /* CPU_386SX */ 120 { "i386DX", CPUCLASS_386 }, /* CPU_386 */ 121 { "i486SX", CPUCLASS_486 }, /* CPU_486SX */ 122 { "i486DX", CPUCLASS_486 }, /* CPU_486 */ 123 { "Pentium", CPUCLASS_586 }, /* CPU_586 */ 124 { "Cyrix 486", CPUCLASS_486 }, /* CPU_486DLC */ 125 { "Pentium Pro", CPUCLASS_686 }, /* CPU_686 */ 126 { "Cyrix 5x86", CPUCLASS_486 }, /* CPU_M1SC */ 127 { "Cyrix 6x86", CPUCLASS_486 }, /* CPU_M1 */ 128 { "Blue Lightning", CPUCLASS_486 }, /* CPU_BLUE */ 129 { "Cyrix 6x86MX", CPUCLASS_686 }, /* CPU_M2 */ 130 { "NexGen 586", CPUCLASS_386 }, /* CPU_NX586 (XXX) */ 131 { "Cyrix 486S/DX", CPUCLASS_486 }, /* CPU_CY486DX */ 132 { "Pentium II", CPUCLASS_686 }, /* CPU_PII */ 133 { "Pentium III", CPUCLASS_686 }, /* CPU_PIII */ 134 { "Pentium 4", CPUCLASS_686 }, /* CPU_P4 */ 135 }; 136 137 #if defined(I586_CPU) && !defined(NO_F00F_HACK) 138 int has_f00f_bug = 0; /* Initialized so that it can be patched. */ 139 #endif 140 141 void 142 printcpuinfo(void) 143 { 144 #if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU) 145 u_int regs[4], i; 146 char *brand; 147 #endif 148 149 cpu_class = i386_cpus[cpu].cpu_class; 150 printf("CPU: "); 151 strncpy(cpu_model, i386_cpus[cpu].cpu_name, sizeof (cpu_model)); 152 153 #if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU) 154 /* Check for extended CPUID information and a processor name. */ 155 if (cpu_high > 0 && 156 (strcmp(cpu_vendor, "GenuineIntel") == 0 || 157 strcmp(cpu_vendor, "AuthenticAMD") == 0 || 158 strcmp(cpu_vendor, "GenuineTMx86") == 0 || 159 strcmp(cpu_vendor, "TransmetaCPU") == 0 || 160 strcmp(cpu_vendor, "Geode by NSC") == 0)) { 161 do_cpuid(0x80000000, regs); 162 if (regs[0] >= 0x80000000) { 163 cpu_exthigh = regs[0]; 164 if (cpu_exthigh >= 0x80000004) { 165 brand = cpu_brand; 166 for (i = 0x80000002; i < 0x80000005; i++) { 167 do_cpuid(i, regs); 168 memcpy(brand, regs, sizeof(regs)); 169 brand += sizeof(regs); 170 } 171 } 172 } 173 } 174 175 /* Detect AMD features (PTE no-execute bit, 3dnow, 64 bit mode etc) */ 176 if (strcmp(cpu_vendor, "GenuineIntel") == 0 || 177 strcmp(cpu_vendor, "AuthenticAMD") == 0) { 178 if (cpu_exthigh >= 0x80000001) { 179 do_cpuid(0x80000001, regs); 180 amd_feature = regs[3] & ~(cpu_feature & 0x0183f3ff); 181 amd_feature2 = regs[2]; 182 } 183 if (cpu_exthigh >= 0x80000008) { 184 do_cpuid(0x80000008, regs); 185 cpu_procinfo2 = regs[2]; 186 } 187 } 188 189 if (strcmp(cpu_vendor, "GenuineIntel") == 0) { 190 if ((cpu_id & 0xf00) > 0x300) { 191 u_int brand_index; 192 193 cpu_model[0] = '\0'; 194 195 switch (cpu_id & 0x3000) { 196 case 0x1000: 197 strcpy(cpu_model, "Overdrive "); 198 break; 199 case 0x2000: 200 strcpy(cpu_model, "Dual "); 201 break; 202 } 203 204 switch (cpu_id & 0xf00) { 205 case 0x400: 206 strcat(cpu_model, "i486 "); 207 /* Check the particular flavor of 486 */ 208 switch (cpu_id & 0xf0) { 209 case 0x00: 210 case 0x10: 211 strcat(cpu_model, "DX"); 212 break; 213 case 0x20: 214 strcat(cpu_model, "SX"); 215 break; 216 case 0x30: 217 strcat(cpu_model, "DX2"); 218 break; 219 case 0x40: 220 strcat(cpu_model, "SL"); 221 break; 222 case 0x50: 223 strcat(cpu_model, "SX2"); 224 break; 225 case 0x70: 226 strcat(cpu_model, 227 "DX2 Write-Back Enhanced"); 228 break; 229 case 0x80: 230 strcat(cpu_model, "DX4"); 231 break; 232 } 233 break; 234 case 0x500: 235 /* Check the particular flavor of 586 */ 236 strcat(cpu_model, "Pentium"); 237 switch (cpu_id & 0xf0) { 238 case 0x00: 239 strcat(cpu_model, " A-step"); 240 break; 241 case 0x10: 242 strcat(cpu_model, "/P5"); 243 break; 244 case 0x20: 245 strcat(cpu_model, "/P54C"); 246 break; 247 case 0x30: 248 strcat(cpu_model, "/P54T Overdrive"); 249 break; 250 case 0x40: 251 strcat(cpu_model, "/P55C"); 252 break; 253 case 0x70: 254 strcat(cpu_model, "/P54C"); 255 break; 256 case 0x80: 257 strcat(cpu_model, "/P55C (quarter-micron)"); 258 break; 259 default: 260 /* nothing */ 261 break; 262 } 263 #if defined(I586_CPU) && !defined(NO_F00F_HACK) 264 /* 265 * XXX - If/when Intel fixes the bug, this 266 * should also check the version of the 267 * CPU, not just that it's a Pentium. 268 */ 269 has_f00f_bug = 1; 270 #endif 271 break; 272 case 0x600: 273 /* Check the particular flavor of 686 */ 274 switch (cpu_id & 0xf0) { 275 case 0x00: 276 strcat(cpu_model, "Pentium Pro A-step"); 277 break; 278 case 0x10: 279 strcat(cpu_model, "Pentium Pro"); 280 break; 281 case 0x30: 282 case 0x50: 283 case 0x60: 284 strcat(cpu_model, 285 "Pentium II/Pentium II Xeon/Celeron"); 286 cpu = CPU_PII; 287 break; 288 case 0x70: 289 case 0x80: 290 case 0xa0: 291 case 0xb0: 292 strcat(cpu_model, 293 "Pentium III/Pentium III Xeon/Celeron"); 294 cpu = CPU_PIII; 295 break; 296 default: 297 strcat(cpu_model, "Unknown 80686"); 298 break; 299 } 300 break; 301 case 0xf00: 302 strcat(cpu_model, "Pentium 4"); 303 cpu = CPU_P4; 304 break; 305 default: 306 strcat(cpu_model, "unknown"); 307 break; 308 } 309 310 /* 311 * If we didn't get a brand name from the extended 312 * CPUID, try to look it up in the brand table. 313 */ 314 if (cpu_high > 0 && *cpu_brand == '\0') { 315 brand_index = cpu_procinfo & CPUID_BRAND_INDEX; 316 if (brand_index <= MAX_BRAND_INDEX && 317 cpu_brandtable[brand_index] != NULL) 318 strcpy(cpu_brand, 319 cpu_brandtable[brand_index]); 320 } 321 } 322 } else if (strcmp(cpu_vendor, "AuthenticAMD") == 0) { 323 /* 324 * Values taken from AMD Processor Recognition 325 * http://www.amd.com/K6/k6docs/pdf/20734g.pdf 326 * (also describes ``Features'' encodings. 327 */ 328 strcpy(cpu_model, "AMD "); 329 switch (cpu_id & 0xFF0) { 330 case 0x410: 331 strcat(cpu_model, "Standard Am486DX"); 332 break; 333 case 0x430: 334 strcat(cpu_model, "Enhanced Am486DX2 Write-Through"); 335 break; 336 case 0x470: 337 strcat(cpu_model, "Enhanced Am486DX2 Write-Back"); 338 break; 339 case 0x480: 340 strcat(cpu_model, "Enhanced Am486DX4/Am5x86 Write-Through"); 341 break; 342 case 0x490: 343 strcat(cpu_model, "Enhanced Am486DX4/Am5x86 Write-Back"); 344 break; 345 case 0x4E0: 346 strcat(cpu_model, "Am5x86 Write-Through"); 347 break; 348 case 0x4F0: 349 strcat(cpu_model, "Am5x86 Write-Back"); 350 break; 351 case 0x500: 352 strcat(cpu_model, "K5 model 0"); 353 tsc_is_broken = 1; 354 break; 355 case 0x510: 356 strcat(cpu_model, "K5 model 1"); 357 break; 358 case 0x520: 359 strcat(cpu_model, "K5 PR166 (model 2)"); 360 break; 361 case 0x530: 362 strcat(cpu_model, "K5 PR200 (model 3)"); 363 break; 364 case 0x560: 365 strcat(cpu_model, "K6"); 366 break; 367 case 0x570: 368 strcat(cpu_model, "K6 266 (model 1)"); 369 break; 370 case 0x580: 371 strcat(cpu_model, "K6-2"); 372 break; 373 case 0x590: 374 strcat(cpu_model, "K6-III"); 375 break; 376 default: 377 strcat(cpu_model, "Unknown"); 378 break; 379 } 380 #if defined(I586_CPU) && defined(CPU_WT_ALLOC) 381 if ((cpu_id & 0xf00) == 0x500) { 382 if (((cpu_id & 0x0f0) > 0) 383 && ((cpu_id & 0x0f0) < 0x60) 384 && ((cpu_id & 0x00f) > 3)) 385 enable_K5_wt_alloc(); 386 else if (((cpu_id & 0x0f0) > 0x80) 387 || (((cpu_id & 0x0f0) == 0x80) 388 && (cpu_id & 0x00f) > 0x07)) 389 enable_K6_2_wt_alloc(); 390 else if ((cpu_id & 0x0f0) > 0x50) 391 enable_K6_wt_alloc(); 392 } 393 #endif 394 } else if (strcmp(cpu_vendor, "CyrixInstead") == 0) { 395 strcpy(cpu_model, "Cyrix "); 396 switch (cpu_id & 0xff0) { 397 case 0x440: 398 strcat(cpu_model, "MediaGX"); 399 break; 400 case 0x520: 401 strcat(cpu_model, "6x86"); 402 break; 403 case 0x540: 404 cpu_class = CPUCLASS_586; 405 strcat(cpu_model, "GXm"); 406 break; 407 case 0x600: 408 strcat(cpu_model, "6x86MX"); 409 break; 410 default: 411 /* 412 * Even though CPU supports the cpuid 413 * instruction, it can be disabled. 414 * Therefore, this routine supports all Cyrix 415 * CPUs. 416 */ 417 switch (cyrix_did & 0xf0) { 418 case 0x00: 419 switch (cyrix_did & 0x0f) { 420 case 0x00: 421 strcat(cpu_model, "486SLC"); 422 break; 423 case 0x01: 424 strcat(cpu_model, "486DLC"); 425 break; 426 case 0x02: 427 strcat(cpu_model, "486SLC2"); 428 break; 429 case 0x03: 430 strcat(cpu_model, "486DLC2"); 431 break; 432 case 0x04: 433 strcat(cpu_model, "486SRx"); 434 break; 435 case 0x05: 436 strcat(cpu_model, "486DRx"); 437 break; 438 case 0x06: 439 strcat(cpu_model, "486SRx2"); 440 break; 441 case 0x07: 442 strcat(cpu_model, "486DRx2"); 443 break; 444 case 0x08: 445 strcat(cpu_model, "486SRu"); 446 break; 447 case 0x09: 448 strcat(cpu_model, "486DRu"); 449 break; 450 case 0x0a: 451 strcat(cpu_model, "486SRu2"); 452 break; 453 case 0x0b: 454 strcat(cpu_model, "486DRu2"); 455 break; 456 default: 457 strcat(cpu_model, "Unknown"); 458 break; 459 } 460 break; 461 case 0x10: 462 switch (cyrix_did & 0x0f) { 463 case 0x00: 464 strcat(cpu_model, "486S"); 465 break; 466 case 0x01: 467 strcat(cpu_model, "486S2"); 468 break; 469 case 0x02: 470 strcat(cpu_model, "486Se"); 471 break; 472 case 0x03: 473 strcat(cpu_model, "486S2e"); 474 break; 475 case 0x0a: 476 strcat(cpu_model, "486DX"); 477 break; 478 case 0x0b: 479 strcat(cpu_model, "486DX2"); 480 break; 481 case 0x0f: 482 strcat(cpu_model, "486DX4"); 483 break; 484 default: 485 strcat(cpu_model, "Unknown"); 486 break; 487 } 488 break; 489 case 0x20: 490 if ((cyrix_did & 0x0f) < 8) 491 strcat(cpu_model, "6x86"); /* Where did you get it? */ 492 else 493 strcat(cpu_model, "5x86"); 494 break; 495 case 0x30: 496 strcat(cpu_model, "6x86"); 497 break; 498 case 0x40: 499 if ((cyrix_did & 0xf000) == 0x3000) { 500 cpu_class = CPUCLASS_586; 501 strcat(cpu_model, "GXm"); 502 } else 503 strcat(cpu_model, "MediaGX"); 504 break; 505 case 0x50: 506 strcat(cpu_model, "6x86MX"); 507 break; 508 case 0xf0: 509 switch (cyrix_did & 0x0f) { 510 case 0x0d: 511 strcat(cpu_model, "Overdrive CPU"); 512 break; 513 case 0x0e: 514 strcpy(cpu_model, "Texas Instruments 486SXL"); 515 break; 516 case 0x0f: 517 strcat(cpu_model, "486SLC/DLC"); 518 break; 519 default: 520 strcat(cpu_model, "Unknown"); 521 break; 522 } 523 break; 524 default: 525 strcat(cpu_model, "Unknown"); 526 break; 527 } 528 break; 529 } 530 } else if (strcmp(cpu_vendor, "RiseRiseRise") == 0) { 531 strcpy(cpu_model, "Rise "); 532 switch (cpu_id & 0xff0) { 533 case 0x500: 534 strcat(cpu_model, "mP6"); 535 break; 536 default: 537 strcat(cpu_model, "Unknown"); 538 } 539 } else if (strcmp(cpu_vendor, "CentaurHauls") == 0) { 540 switch (cpu_id & 0xff0) { 541 case 0x540: 542 strcpy(cpu_model, "IDT WinChip C6"); 543 tsc_is_broken = 1; 544 break; 545 case 0x580: 546 strcpy(cpu_model, "IDT WinChip 2"); 547 break; 548 case 0x660: 549 strcpy(cpu_model, "VIA C3 Samuel"); 550 break; 551 case 0x670: 552 if (cpu_id & 0x8) 553 strcpy(cpu_model, "VIA C3 Ezra"); 554 else 555 strcpy(cpu_model, "VIA C3 Samuel 2"); 556 break; 557 case 0x680: 558 strcpy(cpu_model, "VIA C3 Ezra-T"); 559 break; 560 case 0x690: 561 strcpy(cpu_model, "VIA C3 Nehemiah"); 562 do_cpuid(0xc0000000, regs); 563 if (regs[0] == 0xc0000001) { 564 do_cpuid(0xc0000001, regs); 565 if ((cpu_id & 0xf) >= 3) 566 if ((regs[3] & 0x0c) == 0x0c) 567 strcat(cpu_model, "+RNG"); 568 if ((cpu_id & 0xf) >= 8) 569 if ((regs[3] & 0xc0) == 0xc0) 570 strcat(cpu_model, "+ACE"); 571 } 572 break; 573 default: 574 strcpy(cpu_model, "VIA/IDT Unknown"); 575 } 576 } else if (strcmp(cpu_vendor, "IBM") == 0) { 577 strcpy(cpu_model, "Blue Lightning CPU"); 578 } else if (strcmp(cpu_vendor, "Geode by NSC") == 0) { 579 switch (cpu_id & 0xfff) { 580 case 0x540: 581 strcpy(cpu_model, "Geode SC1100"); 582 cpu = CPU_GEODE1100; 583 tsc_is_broken = 1; 584 break; 585 default: 586 strcpy(cpu_model, "Geode/NSC unknown"); 587 break; 588 } 589 } 590 591 /* 592 * Replace cpu_model with cpu_brand minus leading spaces if 593 * we have one. 594 */ 595 brand = cpu_brand; 596 while (*brand == ' ') 597 ++brand; 598 if (*brand != '\0') 599 strcpy(cpu_model, brand); 600 601 #endif 602 603 printf("%s (", cpu_model); 604 switch(cpu_class) { 605 case CPUCLASS_286: 606 printf("286"); 607 break; 608 case CPUCLASS_386: 609 printf("386"); 610 break; 611 #if defined(I486_CPU) 612 case CPUCLASS_486: 613 printf("486"); 614 bzero_vector = i486_bzero; 615 break; 616 #endif 617 #if defined(I586_CPU) 618 case CPUCLASS_586: 619 hw_clockrate = (tsc_freq + 5000) / 1000000; 620 printf("%jd.%02d-MHz ", 621 (intmax_t)(tsc_freq + 4999) / 1000000, 622 (u_int)((tsc_freq + 4999) / 10000) % 100); 623 printf("586"); 624 break; 625 #endif 626 #if defined(I686_CPU) 627 case CPUCLASS_686: 628 hw_clockrate = (tsc_freq + 5000) / 1000000; 629 printf("%jd.%02d-MHz ", 630 (intmax_t)(tsc_freq + 4999) / 1000000, 631 (u_int)((tsc_freq + 4999) / 10000) % 100); 632 printf("686"); 633 break; 634 #endif 635 default: 636 printf("Unknown"); /* will panic below... */ 637 } 638 printf("-class CPU)\n"); 639 #if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU) 640 if(*cpu_vendor) 641 printf(" Origin = \"%s\"",cpu_vendor); 642 if(cpu_id) 643 printf(" Id = 0x%x", cpu_id); 644 645 if (strcmp(cpu_vendor, "GenuineIntel") == 0 || 646 strcmp(cpu_vendor, "AuthenticAMD") == 0 || 647 strcmp(cpu_vendor, "GenuineTMx86") == 0 || 648 strcmp(cpu_vendor, "TransmetaCPU") == 0 || 649 strcmp(cpu_vendor, "RiseRiseRise") == 0 || 650 strcmp(cpu_vendor, "CentaurHauls") == 0 || 651 strcmp(cpu_vendor, "Geode by NSC") == 0 || 652 ((strcmp(cpu_vendor, "CyrixInstead") == 0) && 653 ((cpu_id & 0xf00) > 0x500))) { 654 printf(" Stepping = %u", cpu_id & 0xf); 655 if (strcmp(cpu_vendor, "CyrixInstead") == 0) 656 printf(" DIR=0x%04x", cyrix_did); 657 if (cpu_high > 0) { 658 u_int cmp = 1, htt = 1; 659 660 /* 661 * Here we should probably set up flags indicating 662 * whether or not various features are available. 663 * The interesting ones are probably VME, PSE, PAE, 664 * and PGE. The code already assumes without bothering 665 * to check that all CPUs >= Pentium have a TSC and 666 * MSRs. 667 */ 668 printf("\n Features=0x%b", cpu_feature, 669 "\020" 670 "\001FPU" /* Integral FPU */ 671 "\002VME" /* Extended VM86 mode support */ 672 "\003DE" /* Debugging Extensions (CR4.DE) */ 673 "\004PSE" /* 4MByte page tables */ 674 "\005TSC" /* Timestamp counter */ 675 "\006MSR" /* Machine specific registers */ 676 "\007PAE" /* Physical address extension */ 677 "\010MCE" /* Machine Check support */ 678 "\011CX8" /* CMPEXCH8 instruction */ 679 "\012APIC" /* SMP local APIC */ 680 "\013oldMTRR" /* Previous implementation of MTRR */ 681 "\014SEP" /* Fast System Call */ 682 "\015MTRR" /* Memory Type Range Registers */ 683 "\016PGE" /* PG_G (global bit) support */ 684 "\017MCA" /* Machine Check Architecture */ 685 "\020CMOV" /* CMOV instruction */ 686 "\021PAT" /* Page attributes table */ 687 "\022PSE36" /* 36 bit address space support */ 688 "\023PN" /* Processor Serial number */ 689 "\024CLFLUSH" /* Has the CLFLUSH instruction */ 690 "\025<b20>" 691 "\026DTS" /* Debug Trace Store */ 692 "\027ACPI" /* ACPI support */ 693 "\030MMX" /* MMX instructions */ 694 "\031FXSR" /* FXSAVE/FXRSTOR */ 695 "\032SSE" /* Streaming SIMD Extensions */ 696 "\033SSE2" /* Streaming SIMD Extensions #2 */ 697 "\034SS" /* Self snoop */ 698 "\035HTT" /* Hyperthreading (see EBX bit 16-23) */ 699 "\036TM" /* Thermal Monitor clock slowdown */ 700 "\037IA64" /* CPU can execute IA64 instructions */ 701 "\040PBE" /* Pending Break Enable */ 702 ); 703 704 if (cpu_feature2 != 0) { 705 printf("\n Features2=0x%b", cpu_feature2, 706 "\020" 707 "\001SSE3" /* SSE3 */ 708 "\002<b1>" 709 "\003RSVD2" /* "Reserved" bit 2 */ 710 "\004MON" /* MONITOR/MWAIT Instructions */ 711 "\005DS_CPL" /* CPL Qualified Debug Store */ 712 "\006VMX" /* Virtual Machine Extensions */ 713 "\007<b6>" 714 "\010EST" /* Enhanced SpeedStep */ 715 "\011TM2" /* Thermal Monitor 2 */ 716 "\012<b9>" 717 "\013CNTX-ID" /* L1 context ID available */ 718 "\014<b11>" 719 "\015<b12>" 720 "\016CX16" /* CMPXCHG16B Instruction */ 721 "\017<b14>" 722 "\020<b15>" 723 "\021<b16>" 724 "\022<b17>" 725 "\023<b18>" 726 "\024<b19>" 727 "\025<b20>" 728 "\026<b21>" 729 "\027<b22>" 730 "\030<b23>" 731 "\031<b24>" 732 "\032<b25>" 733 "\033<b26>" 734 "\034<b27>" 735 "\035<b28>" 736 "\036<b29>" 737 "\037<b30>" 738 "\040<b31>" 739 ); 740 } 741 742 /* 743 * AMD64 Architecture Programmer's Manual Volume 3: 744 * General-Purpose and System Instructions 745 * http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/24594.pdf 746 * 747 * IA-32 Intel Architecture Software Developer's Manual, 748 * Volume 2A: Instruction Set Reference, A-M 749 * ftp://download.intel.com/design/Pentium4/manuals/25366617.pdf 750 */ 751 if (amd_feature != 0) { 752 printf("\n AMD Features=0x%b", amd_feature, 753 "\020" /* in hex */ 754 "\001<s0>" /* Same */ 755 "\002<s1>" /* Same */ 756 "\003<s2>" /* Same */ 757 "\004<s3>" /* Same */ 758 "\005<s4>" /* Same */ 759 "\006<s5>" /* Same */ 760 "\007<s6>" /* Same */ 761 "\010<s7>" /* Same */ 762 "\011<s8>" /* Same */ 763 "\012<s9>" /* Same */ 764 "\013<b10>" /* Undefined */ 765 "\014SYSCALL" /* Have SYSCALL/SYSRET */ 766 "\015<s12>" /* Same */ 767 "\016<s13>" /* Same */ 768 "\017<s14>" /* Same */ 769 "\020<s15>" /* Same */ 770 "\021<s16>" /* Same */ 771 "\022<s17>" /* Same */ 772 "\023<b18>" /* Reserved, unknown */ 773 "\024MP" /* Multiprocessor Capable */ 774 "\025NX" /* Has EFER.NXE, NX */ 775 "\026<b21>" /* Undefined */ 776 "\027MMX+" /* AMD MMX Extensions */ 777 "\030<s23>" /* Same */ 778 "\031<s24>" /* Same */ 779 "\032FFXSR" /* Fast FXSAVE/FXRSTOR */ 780 "\033<b26>" /* Undefined */ 781 "\034RDTSCP" /* RDTSCP */ 782 "\035<b28>" /* Undefined */ 783 "\036LM" /* 64 bit long mode */ 784 "\0373DNow+" /* AMD 3DNow! Extensions */ 785 "\0403DNow" /* AMD 3DNow! */ 786 ); 787 } 788 789 if (amd_feature2 != 0) { 790 printf("\n AMD Features2=0x%b", amd_feature2, 791 "\020" 792 "\001LAHF" /* LAHF/SAHF in long mode */ 793 "\002CMP" /* CMP legacy */ 794 "\003<b2>" 795 "\004<b3>" 796 "\005CR8" /* CR8 in legacy mode */ 797 "\006<b5>" 798 "\007<b6>" 799 "\010<b7>" 800 "\011<b8>" 801 "\012<b9>" 802 "\013<b10>" 803 "\014<b11>" 804 "\015<b12>" 805 "\016<b13>" 806 "\017<b14>" 807 "\020<b15>" 808 "\021<b16>" 809 "\022<b17>" 810 "\023<b18>" 811 "\024<b19>" 812 "\025<b20>" 813 "\026<b21>" 814 "\027<b22>" 815 "\030<b23>" 816 "\031<b24>" 817 "\032<b25>" 818 "\033<b26>" 819 "\034<b27>" 820 "\035<b28>" 821 "\036<b29>" 822 "\037<b30>" 823 "\040<b31>" 824 ); 825 } 826 827 if (cpu_feature & CPUID_HTT && strcmp(cpu_vendor, 828 "AuthenticAMD") == 0) { 829 cpu_feature &= ~CPUID_HTT; 830 if (bootverbose) 831 printf("\n HTT bit cleared - FreeBSD" 832 " does not have licensing issues" 833 " requiring it.\n"); 834 } 835 836 /* 837 * If this CPU supports HTT or CMP then mention the 838 * number of physical/logical cores it contains. 839 */ 840 if (cpu_feature & CPUID_HTT) 841 htt = (cpu_procinfo & CPUID_HTT_CORES) >> 16; 842 if (strcmp(cpu_vendor, "AuthenticAMD") == 0 && 843 (amd_feature2 & AMDID2_CMP)) 844 cmp = (cpu_procinfo2 & AMDID_CMP_CORES) + 1; 845 else if (strcmp(cpu_vendor, "GenuineIntel") == 0 && 846 (cpu_high >= 4)) { 847 cpuid_count(4, 0, regs); 848 cmp = ((regs[0] & 0xfc000000) >> 26) + 1; 849 } 850 if (cmp > 1) 851 printf("\n Cores per package: %d", cmp); 852 if ((htt / cmp) > 1) 853 printf("\n Logical CPUs per core: %d", 854 htt / cmp); 855 } 856 } else if (strcmp(cpu_vendor, "CyrixInstead") == 0) { 857 printf(" DIR=0x%04x", cyrix_did); 858 printf(" Stepping=%u", (cyrix_did & 0xf000) >> 12); 859 printf(" Revision=%u", (cyrix_did & 0x0f00) >> 8); 860 #ifndef CYRIX_CACHE_REALLY_WORKS 861 if (cpu == CPU_M1 && (cyrix_did & 0xff00) < 0x1700) 862 printf("\n CPU cache: write-through mode"); 863 #endif 864 } 865 /* Avoid ugly blank lines: only print newline when we have to. */ 866 if (*cpu_vendor || cpu_id) 867 printf("\n"); 868 869 #endif 870 871 if (!bootverbose) 872 return; 873 874 if (strcmp(cpu_vendor, "AuthenticAMD") == 0) 875 print_AMD_info(); 876 else if (strcmp(cpu_vendor, "GenuineTMx86") == 0 || 877 strcmp(cpu_vendor, "TransmetaCPU") == 0) 878 print_transmeta_info(); 879 880 #ifdef I686_CPU 881 /* 882 * XXX - Do PPro CPUID level=2 stuff here? 883 * 884 * No, but maybe in a print_Intel_info() function called from here. 885 */ 886 #endif 887 } 888 889 void 890 panicifcpuunsupported(void) 891 { 892 893 #if !defined(lint) 894 #if !defined(I486_CPU) && !defined(I586_CPU) && !defined(I686_CPU) 895 #error This kernel is not configured for one of the supported CPUs 896 #endif 897 #else /* lint */ 898 #endif /* lint */ 899 /* 900 * Now that we have told the user what they have, 901 * let them know if that machine type isn't configured. 902 */ 903 switch (cpu_class) { 904 case CPUCLASS_286: /* a 286 should not make it this far, anyway */ 905 case CPUCLASS_386: 906 #if !defined(I486_CPU) 907 case CPUCLASS_486: 908 #endif 909 #if !defined(I586_CPU) 910 case CPUCLASS_586: 911 #endif 912 #if !defined(I686_CPU) 913 case CPUCLASS_686: 914 #endif 915 panic("CPU class not configured"); 916 default: 917 break; 918 } 919 } 920 921 922 static volatile u_int trap_by_rdmsr; 923 924 /* 925 * Special exception 6 handler. 926 * The rdmsr instruction generates invalid opcodes fault on 486-class 927 * Cyrix CPU. Stacked eip register points the rdmsr instruction in the 928 * function identblue() when this handler is called. Stacked eip should 929 * be advanced. 930 */ 931 inthand_t bluetrap6; 932 #ifdef __GNUCLIKE_ASM 933 __asm 934 (" \n\ 935 .text \n\ 936 .p2align 2,0x90 \n\ 937 .type " __XSTRING(CNAME(bluetrap6)) ",@function \n\ 938 " __XSTRING(CNAME(bluetrap6)) ": \n\ 939 ss \n\ 940 movl $0xa8c1d," __XSTRING(CNAME(trap_by_rdmsr)) " \n\ 941 addl $2, (%esp) /* rdmsr is a 2-byte instruction */ \n\ 942 iret \n\ 943 "); 944 #endif 945 946 /* 947 * Special exception 13 handler. 948 * Accessing non-existent MSR generates general protection fault. 949 */ 950 inthand_t bluetrap13; 951 #ifdef __GNUCLIKE_ASM 952 __asm 953 (" \n\ 954 .text \n\ 955 .p2align 2,0x90 \n\ 956 .type " __XSTRING(CNAME(bluetrap13)) ",@function \n\ 957 " __XSTRING(CNAME(bluetrap13)) ": \n\ 958 ss \n\ 959 movl $0xa89c4," __XSTRING(CNAME(trap_by_rdmsr)) " \n\ 960 popl %eax /* discard error code */ \n\ 961 addl $2, (%esp) /* rdmsr is a 2-byte instruction */ \n\ 962 iret \n\ 963 "); 964 #endif 965 966 /* 967 * Distinguish IBM Blue Lightning CPU from Cyrix CPUs that does not 968 * support cpuid instruction. This function should be called after 969 * loading interrupt descriptor table register. 970 * 971 * I don't like this method that handles fault, but I couldn't get 972 * information for any other methods. Does blue giant know? 973 */ 974 static int 975 identblue(void) 976 { 977 978 trap_by_rdmsr = 0; 979 980 /* 981 * Cyrix 486-class CPU does not support rdmsr instruction. 982 * The rdmsr instruction generates invalid opcode fault, and exception 983 * will be trapped by bluetrap6() on Cyrix 486-class CPU. The 984 * bluetrap6() set the magic number to trap_by_rdmsr. 985 */ 986 setidt(IDT_UD, bluetrap6, SDT_SYS386TGT, SEL_KPL, 987 GSEL(GCODE_SEL, SEL_KPL)); 988 989 /* 990 * Certain BIOS disables cpuid instruction of Cyrix 6x86MX CPU. 991 * In this case, rdmsr generates general protection fault, and 992 * exception will be trapped by bluetrap13(). 993 */ 994 setidt(IDT_GP, bluetrap13, SDT_SYS386TGT, SEL_KPL, 995 GSEL(GCODE_SEL, SEL_KPL)); 996 997 rdmsr(0x1002); /* Cyrix CPU generates fault. */ 998 999 if (trap_by_rdmsr == 0xa8c1d) 1000 return IDENTBLUE_CYRIX486; 1001 else if (trap_by_rdmsr == 0xa89c4) 1002 return IDENTBLUE_CYRIXM2; 1003 return IDENTBLUE_IBMCPU; 1004 } 1005 1006 1007 /* 1008 * identifycyrix() set lower 16 bits of cyrix_did as follows: 1009 * 1010 * F E D C B A 9 8 7 6 5 4 3 2 1 0 1011 * +-------+-------+---------------+ 1012 * | SID | RID | Device ID | 1013 * | (DIR 1) | (DIR 0) | 1014 * +-------+-------+---------------+ 1015 */ 1016 static void 1017 identifycyrix(void) 1018 { 1019 u_int eflags; 1020 int ccr2_test = 0, dir_test = 0; 1021 u_char ccr2, ccr3; 1022 1023 eflags = read_eflags(); 1024 disable_intr(); 1025 1026 ccr2 = read_cyrix_reg(CCR2); 1027 write_cyrix_reg(CCR2, ccr2 ^ CCR2_LOCK_NW); 1028 read_cyrix_reg(CCR2); 1029 if (read_cyrix_reg(CCR2) != ccr2) 1030 ccr2_test = 1; 1031 write_cyrix_reg(CCR2, ccr2); 1032 1033 ccr3 = read_cyrix_reg(CCR3); 1034 write_cyrix_reg(CCR3, ccr3 ^ CCR3_MAPEN3); 1035 read_cyrix_reg(CCR3); 1036 if (read_cyrix_reg(CCR3) != ccr3) 1037 dir_test = 1; /* CPU supports DIRs. */ 1038 write_cyrix_reg(CCR3, ccr3); 1039 1040 if (dir_test) { 1041 /* Device ID registers are available. */ 1042 cyrix_did = read_cyrix_reg(DIR1) << 8; 1043 cyrix_did += read_cyrix_reg(DIR0); 1044 } else if (ccr2_test) 1045 cyrix_did = 0x0010; /* 486S A-step */ 1046 else 1047 cyrix_did = 0x00ff; /* Old 486SLC/DLC and TI486SXLC/SXL */ 1048 1049 write_eflags(eflags); 1050 } 1051 1052 /* 1053 * Final stage of CPU identification. -- Should I check TI? 1054 */ 1055 void 1056 finishidentcpu(void) 1057 { 1058 int isblue = 0; 1059 u_char ccr3; 1060 u_int regs[4]; 1061 1062 if (strcmp(cpu_vendor, "CyrixInstead") == 0) { 1063 if (cpu == CPU_486) { 1064 /* 1065 * These conditions are equivalent to: 1066 * - CPU does not support cpuid instruction. 1067 * - Cyrix/IBM CPU is detected. 1068 */ 1069 isblue = identblue(); 1070 if (isblue == IDENTBLUE_IBMCPU) { 1071 strcpy(cpu_vendor, "IBM"); 1072 cpu = CPU_BLUE; 1073 return; 1074 } 1075 } 1076 switch (cpu_id & 0xf00) { 1077 case 0x600: 1078 /* 1079 * Cyrix's datasheet does not describe DIRs. 1080 * Therefor, I assume it does not have them 1081 * and use the result of the cpuid instruction. 1082 * XXX they seem to have it for now at least. -Peter 1083 */ 1084 identifycyrix(); 1085 cpu = CPU_M2; 1086 break; 1087 default: 1088 identifycyrix(); 1089 /* 1090 * This routine contains a trick. 1091 * Don't check (cpu_id & 0x00f0) == 0x50 to detect M2, now. 1092 */ 1093 switch (cyrix_did & 0x00f0) { 1094 case 0x00: 1095 case 0xf0: 1096 cpu = CPU_486DLC; 1097 break; 1098 case 0x10: 1099 cpu = CPU_CY486DX; 1100 break; 1101 case 0x20: 1102 if ((cyrix_did & 0x000f) < 8) 1103 cpu = CPU_M1; 1104 else 1105 cpu = CPU_M1SC; 1106 break; 1107 case 0x30: 1108 cpu = CPU_M1; 1109 break; 1110 case 0x40: 1111 /* MediaGX CPU */ 1112 cpu = CPU_M1SC; 1113 break; 1114 default: 1115 /* M2 and later CPUs are treated as M2. */ 1116 cpu = CPU_M2; 1117 1118 /* 1119 * enable cpuid instruction. 1120 */ 1121 ccr3 = read_cyrix_reg(CCR3); 1122 write_cyrix_reg(CCR3, CCR3_MAPEN0); 1123 write_cyrix_reg(CCR4, read_cyrix_reg(CCR4) | CCR4_CPUID); 1124 write_cyrix_reg(CCR3, ccr3); 1125 1126 do_cpuid(0, regs); 1127 cpu_high = regs[0]; /* eax */ 1128 do_cpuid(1, regs); 1129 cpu_id = regs[0]; /* eax */ 1130 cpu_feature = regs[3]; /* edx */ 1131 break; 1132 } 1133 } 1134 } else if (cpu == CPU_486 && *cpu_vendor == '\0') { 1135 /* 1136 * There are BlueLightning CPUs that do not change 1137 * undefined flags by dividing 5 by 2. In this case, 1138 * the CPU identification routine in locore.s leaves 1139 * cpu_vendor null string and puts CPU_486 into the 1140 * cpu. 1141 */ 1142 isblue = identblue(); 1143 if (isblue == IDENTBLUE_IBMCPU) { 1144 strcpy(cpu_vendor, "IBM"); 1145 cpu = CPU_BLUE; 1146 return; 1147 } 1148 } 1149 } 1150 1151 static void 1152 print_AMD_assoc(int i) 1153 { 1154 if (i == 255) 1155 printf(", fully associative\n"); 1156 else 1157 printf(", %d-way associative\n", i); 1158 } 1159 1160 static void 1161 print_AMD_info(void) 1162 { 1163 quad_t amd_whcr; 1164 1165 if (cpu_exthigh >= 0x80000005) { 1166 u_int regs[4]; 1167 1168 do_cpuid(0x80000005, regs); 1169 printf("Data TLB: %d entries", (regs[1] >> 16) & 0xff); 1170 print_AMD_assoc(regs[1] >> 24); 1171 printf("Instruction TLB: %d entries", regs[1] & 0xff); 1172 print_AMD_assoc((regs[1] >> 8) & 0xff); 1173 printf("L1 data cache: %d kbytes", regs[2] >> 24); 1174 printf(", %d bytes/line", regs[2] & 0xff); 1175 printf(", %d lines/tag", (regs[2] >> 8) & 0xff); 1176 print_AMD_assoc((regs[2] >> 16) & 0xff); 1177 printf("L1 instruction cache: %d kbytes", regs[3] >> 24); 1178 printf(", %d bytes/line", regs[3] & 0xff); 1179 printf(", %d lines/tag", (regs[3] >> 8) & 0xff); 1180 print_AMD_assoc((regs[3] >> 16) & 0xff); 1181 if (cpu_exthigh >= 0x80000006) { /* K6-III only */ 1182 do_cpuid(0x80000006, regs); 1183 printf("L2 internal cache: %d kbytes", regs[2] >> 16); 1184 printf(", %d bytes/line", regs[2] & 0xff); 1185 printf(", %d lines/tag", (regs[2] >> 8) & 0x0f); 1186 print_AMD_assoc((regs[2] >> 12) & 0x0f); 1187 } 1188 } 1189 if (((cpu_id & 0xf00) == 0x500) 1190 && (((cpu_id & 0x0f0) > 0x80) 1191 || (((cpu_id & 0x0f0) == 0x80) 1192 && (cpu_id & 0x00f) > 0x07))) { 1193 /* K6-2(new core [Stepping 8-F]), K6-III or later */ 1194 amd_whcr = rdmsr(0xc0000082); 1195 if (!(amd_whcr & (0x3ff << 22))) { 1196 printf("Write Allocate Disable\n"); 1197 } else { 1198 printf("Write Allocate Enable Limit: %dM bytes\n", 1199 (u_int32_t)((amd_whcr & (0x3ff << 22)) >> 22) * 4); 1200 printf("Write Allocate 15-16M bytes: %s\n", 1201 (amd_whcr & (1 << 16)) ? "Enable" : "Disable"); 1202 } 1203 } else if (((cpu_id & 0xf00) == 0x500) 1204 && ((cpu_id & 0x0f0) > 0x50)) { 1205 /* K6, K6-2(old core) */ 1206 amd_whcr = rdmsr(0xc0000082); 1207 if (!(amd_whcr & (0x7f << 1))) { 1208 printf("Write Allocate Disable\n"); 1209 } else { 1210 printf("Write Allocate Enable Limit: %dM bytes\n", 1211 (u_int32_t)((amd_whcr & (0x7f << 1)) >> 1) * 4); 1212 printf("Write Allocate 15-16M bytes: %s\n", 1213 (amd_whcr & 0x0001) ? "Enable" : "Disable"); 1214 printf("Hardware Write Allocate Control: %s\n", 1215 (amd_whcr & 0x0100) ? "Enable" : "Disable"); 1216 } 1217 } 1218 } 1219 1220 static void 1221 print_transmeta_info() 1222 { 1223 u_int regs[4], nreg = 0; 1224 1225 do_cpuid(0x80860000, regs); 1226 nreg = regs[0]; 1227 if (nreg >= 0x80860001) { 1228 do_cpuid(0x80860001, regs); 1229 printf(" Processor revision %u.%u.%u.%u\n", 1230 (regs[1] >> 24) & 0xff, 1231 (regs[1] >> 16) & 0xff, 1232 (regs[1] >> 8) & 0xff, 1233 regs[1] & 0xff); 1234 } 1235 if (nreg >= 0x80860002) { 1236 do_cpuid(0x80860002, regs); 1237 printf(" Code Morphing Software revision %u.%u.%u-%u-%u\n", 1238 (regs[1] >> 24) & 0xff, 1239 (regs[1] >> 16) & 0xff, 1240 (regs[1] >> 8) & 0xff, 1241 regs[1] & 0xff, 1242 regs[2]); 1243 } 1244 if (nreg >= 0x80860006) { 1245 char info[65]; 1246 do_cpuid(0x80860003, (u_int*) &info[0]); 1247 do_cpuid(0x80860004, (u_int*) &info[16]); 1248 do_cpuid(0x80860005, (u_int*) &info[32]); 1249 do_cpuid(0x80860006, (u_int*) &info[48]); 1250 info[64] = 0; 1251 printf(" %s\n", info); 1252 } 1253 }
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