sys/i386/i386/identcpu.c

   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/intr_machdep.h>
  59 #include <machine/md_var.h>
  60 #include <machine/segments.h>
  61 #include <machine/specialreg.h>
  62
  63 #define IDENTBLUE_CYRIX486      0
  64 #define IDENTBLUE_IBMCPU        1
  65 #define IDENTBLUE_CYRIXM2       2
  66
  67 /* XXX - should be in header file: */
  68 void printcpuinfo(void);
  69 void finishidentcpu(void);
  70 void earlysetcpuclass(void);
  71 #if defined(I586_CPU) && defined(CPU_WT_ALLOC)
  72 void    enable_K5_wt_alloc(void);
  73 void    enable_K6_wt_alloc(void);
  74 void    enable_K6_2_wt_alloc(void);
  75 #endif
  76 void panicifcpuunsupported(void);
  77
  78 static void identifycyrix(void);
  79 static void init_exthigh(void);
  80 static u_int find_cpu_vendor_id(void);
  81 static void print_AMD_info(void);
  82 static void print_INTEL_info(void);
  83 static void print_INTEL_TLB(u_int data);
  84 static void print_AMD_assoc(int i);
  85 static void print_transmeta_info(void);
  86 static void print_via_padlock_info(void);
  87
  88 int     cpu_class;
  89 u_int   cpu_exthigh;            /* Highest arg to extended CPUID */
  90 u_int   cyrix_did;              /* Device ID of Cyrix CPU */
  91 char machine[] = MACHINE;
  92 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD,
  93     machine, 0, "Machine class");
  94
  95 static char cpu_model[128];
  96 SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD,
  97     cpu_model, 0, "Machine model");
  98
  99 static int hw_clockrate;
 100 SYSCTL_INT(_hw, OID_AUTO, clockrate, CTLFLAG_RD,
 101     &hw_clockrate, 0, "CPU instruction clock rate");
 102
 103 static char cpu_brand[48];
 104
 105 #define MAX_BRAND_INDEX 8
 106
 107 static const char *cpu_brandtable[MAX_BRAND_INDEX + 1] = {
 108         NULL,                   /* No brand */
 109         "Intel Celeron",
 110         "Intel Pentium III",
 111         "Intel Pentium III Xeon",
 112         NULL,
 113         NULL,
 114         NULL,
 115         NULL,
 116         "Intel Pentium 4"
 117 };
 118
 119 static struct {
 120         char    *cpu_name;
 121         int     cpu_class;
 122 } i386_cpus[] = {
 123         { "Intel 80286",        CPUCLASS_286 },         /* CPU_286   */
 124         { "i386SX",             CPUCLASS_386 },         /* CPU_386SX */
 125         { "i386DX",             CPUCLASS_386 },         /* CPU_386   */
 126         { "i486SX",             CPUCLASS_486 },         /* CPU_486SX */
 127         { "i486DX",             CPUCLASS_486 },         /* CPU_486   */
 128         { "Pentium",            CPUCLASS_586 },         /* CPU_586   */
 129         { "Cyrix 486",          CPUCLASS_486 },         /* CPU_486DLC */
 130         { "Pentium Pro",        CPUCLASS_686 },         /* CPU_686 */
 131         { "Cyrix 5x86",         CPUCLASS_486 },         /* CPU_M1SC */
 132         { "Cyrix 6x86",         CPUCLASS_486 },         /* CPU_M1 */
 133         { "Blue Lightning",     CPUCLASS_486 },         /* CPU_BLUE */
 134         { "Cyrix 6x86MX",       CPUCLASS_686 },         /* CPU_M2 */
 135         { "NexGen 586",         CPUCLASS_386 },         /* CPU_NX586 (XXX) */
 136         { "Cyrix 486S/DX",      CPUCLASS_486 },         /* CPU_CY486DX */
 137         { "Pentium II",         CPUCLASS_686 },         /* CPU_PII */
 138         { "Pentium III",        CPUCLASS_686 },         /* CPU_PIII */
 139         { "Pentium 4",          CPUCLASS_686 },         /* CPU_P4 */
 140 };
 141
 142 static struct {
 143         char    *vendor;
 144         u_int   vendor_id;
 145 } cpu_vendors[] = {
 146         { INTEL_VENDOR_ID,      CPU_VENDOR_INTEL },     /* GenuineIntel */
 147         { AMD_VENDOR_ID,        CPU_VENDOR_AMD },       /* AuthenticAMD */
 148         { CENTAUR_VENDOR_ID,    CPU_VENDOR_CENTAUR },   /* CentaurHauls */
 149         { NSC_VENDOR_ID,        CPU_VENDOR_NSC },       /* Geode by NSC */
 150         { CYRIX_VENDOR_ID,      CPU_VENDOR_CYRIX },     /* CyrixInstead */
 151         { TRANSMETA_VENDOR_ID,  CPU_VENDOR_TRANSMETA }, /* GenuineTMx86 */
 152         { SIS_VENDOR_ID,        CPU_VENDOR_SIS },       /* SiS SiS SiS  */
 153         { UMC_VENDOR_ID,        CPU_VENDOR_UMC },       /* UMC UMC UMC  */
 154         { NEXGEN_VENDOR_ID,     CPU_VENDOR_NEXGEN },    /* NexGenDriven */
 155         { RISE_VENDOR_ID,       CPU_VENDOR_RISE },      /* RiseRiseRise */
 156 #if 0
 157         /* XXX CPUID 8000_0000h and 8086_0000h, not 0000_0000h */
 158         { "TransmetaCPU",       CPU_VENDOR_TRANSMETA },
 159 #endif
 160 };
 161
 162 #if defined(I586_CPU) && !defined(NO_F00F_HACK)
 163 int has_f00f_bug = 0;           /* Initialized so that it can be patched. */
 164 #endif
 165
 166 static void
 167 init_exthigh(void)
 168 {
 169         static int done = 0;
 170         u_int regs[4];
 171
 172         if (done == 0) {
 173                 if (cpu_high > 0 &&
 174                     (cpu_vendor_id == CPU_VENDOR_INTEL ||
 175                     cpu_vendor_id == CPU_VENDOR_AMD ||
 176                     cpu_vendor_id == CPU_VENDOR_TRANSMETA ||
 177                     cpu_vendor_id == CPU_VENDOR_CENTAUR ||
 178                     cpu_vendor_id == CPU_VENDOR_NSC)) {
 179                         do_cpuid(0x80000000, regs);
 180                         if (regs[0] >= 0x80000000)
 181                                 cpu_exthigh = regs[0];
 182                 }
 183
 184                 done = 1;
 185         }
 186 }
 187
 188 void
 189 printcpuinfo(void)
 190 {
 191         u_int regs[4], i;
 192         char *brand;
 193
 194         cpu_class = i386_cpus[cpu].cpu_class;
 195         printf("CPU: ");
 196         strncpy(cpu_model, i386_cpus[cpu].cpu_name, sizeof (cpu_model));
 197
 198         /* Check for extended CPUID information and a processor name. */
 199         init_exthigh();
 200         if (cpu_exthigh >= 0x80000004) {
 201                 brand = cpu_brand;
 202                 for (i = 0x80000002; i < 0x80000005; i++) {
 203                         do_cpuid(i, regs);
 204                         memcpy(brand, regs, sizeof(regs));
 205                         brand += sizeof(regs);
 206                 }
 207         }
 208
 209         if (cpu_vendor_id == CPU_VENDOR_INTEL) {
 210                 if ((cpu_id & 0xf00) > 0x300) {
 211                         u_int brand_index;
 212
 213                         cpu_model[0] = '\0';
 214
 215                         switch (cpu_id & 0x3000) {
 216                         case 0x1000:
 217                                 strcpy(cpu_model, "Overdrive ");
 218                                 break;
 219                         case 0x2000:
 220                                 strcpy(cpu_model, "Dual ");
 221                                 break;
 222                         }
 223
 224                         switch (cpu_id & 0xf00) {
 225                         case 0x400:
 226                                 strcat(cpu_model, "i486 ");
 227                                 /* Check the particular flavor of 486 */
 228                                 switch (cpu_id & 0xf0) {
 229                                 case 0x00:
 230                                 case 0x10:
 231                                         strcat(cpu_model, "DX");
 232                                         break;
 233                                 case 0x20:
 234                                         strcat(cpu_model, "SX");
 235                                         break;
 236                                 case 0x30:
 237                                         strcat(cpu_model, "DX2");
 238                                         break;
 239                                 case 0x40:
 240                                         strcat(cpu_model, "SL");
 241                                         break;
 242                                 case 0x50:
 243                                         strcat(cpu_model, "SX2");
 244                                         break;
 245                                 case 0x70:
 246                                         strcat(cpu_model,
 247                                             "DX2 Write-Back Enhanced");
 248                                         break;
 249                                 case 0x80:
 250                                         strcat(cpu_model, "DX4");
 251                                         break;
 252                                 }
 253                                 break;
 254                         case 0x500:
 255                                 /* Check the particular flavor of 586 */
 256                                 strcat(cpu_model, "Pentium");
 257                                 switch (cpu_id & 0xf0) {
 258                                 case 0x00:
 259                                         strcat(cpu_model, " A-step");
 260                                         break;
 261                                 case 0x10:
 262                                         strcat(cpu_model, "/P5");
 263                                         break;
 264                                 case 0x20:
 265                                         strcat(cpu_model, "/P54C");
 266                                         break;
 267                                 case 0x30:
 268                                         strcat(cpu_model, "/P24T");
 269                                         break;
 270                                 case 0x40:
 271                                         strcat(cpu_model, "/P55C");
 272                                         break;
 273                                 case 0x70:
 274                                         strcat(cpu_model, "/P54C");
 275                                         break;
 276                                 case 0x80:
 277                                         strcat(cpu_model, "/P55C (quarter-micron)");
 278                                         break;
 279                                 default:
 280                                         /* nothing */
 281                                         break;
 282                                 }
 283 #if defined(I586_CPU) && !defined(NO_F00F_HACK)
 284                                 /*
 285                                  * XXX - If/when Intel fixes the bug, this
 286                                  * should also check the version of the
 287                                  * CPU, not just that it's a Pentium.
 288                                  */
 289                                 has_f00f_bug = 1;
 290 #endif
 291                                 break;
 292                         case 0x600:
 293                                 /* Check the particular flavor of 686 */
 294                                 switch (cpu_id & 0xf0) {
 295                                 case 0x00:
 296                                         strcat(cpu_model, "Pentium Pro A-step");
 297                                         break;
 298                                 case 0x10:
 299                                         strcat(cpu_model, "Pentium Pro");
 300                                         break;
 301                                 case 0x30:
 302                                 case 0x50:
 303                                 case 0x60:
 304                                         strcat(cpu_model,
 305                                 "Pentium II/Pentium II Xeon/Celeron");
 306                                         cpu = CPU_PII;
 307                                         break;
 308                                 case 0x70:
 309                                 case 0x80:
 310                                 case 0xa0:
 311                                 case 0xb0:
 312                                         strcat(cpu_model,
 313                                         "Pentium III/Pentium III Xeon/Celeron");
 314                                         cpu = CPU_PIII;
 315                                         break;
 316                                 default:
 317                                         strcat(cpu_model, "Unknown 80686");
 318                                         break;
 319                                 }
 320                                 break;
 321                         case 0xf00:
 322                                 strcat(cpu_model, "Pentium 4");
 323                                 cpu = CPU_P4;
 324                                 break;
 325                         default:
 326                                 strcat(cpu_model, "unknown");
 327                                 break;
 328                         }
 329
 330                         /*
 331                          * If we didn't get a brand name from the extended
 332                          * CPUID, try to look it up in the brand table.
 333                          */
 334                         if (cpu_high > 0 && *cpu_brand == '\0') {
 335                                 brand_index = cpu_procinfo & CPUID_BRAND_INDEX;
 336                                 if (brand_index <= MAX_BRAND_INDEX &&
 337                                     cpu_brandtable[brand_index] != NULL)
 338                                         strcpy(cpu_brand,
 339                                             cpu_brandtable[brand_index]);
 340                         }
 341                 }
 342         } else if (cpu_vendor_id == CPU_VENDOR_AMD) {
 343                 /*
 344                  * Values taken from AMD Processor Recognition
 345                  * http://www.amd.com/K6/k6docs/pdf/20734g.pdf
 346                  * (also describes ``Features'' encodings.
 347                  */
 348                 strcpy(cpu_model, "AMD ");
 349                 switch (cpu_id & 0xFF0) {
 350                 case 0x410:
 351                         strcat(cpu_model, "Standard Am486DX");
 352                         break;
 353                 case 0x430:
 354                         strcat(cpu_model, "Enhanced Am486DX2 Write-Through");
 355                         break;
 356                 case 0x470:
 357                         strcat(cpu_model, "Enhanced Am486DX2 Write-Back");
 358                         break;
 359                 case 0x480:
 360                         strcat(cpu_model, "Enhanced Am486DX4/Am5x86 Write-Through");
 361                         break;
 362                 case 0x490:
 363                         strcat(cpu_model, "Enhanced Am486DX4/Am5x86 Write-Back");
 364                         break;
 365                 case 0x4E0:
 366                         strcat(cpu_model, "Am5x86 Write-Through");
 367                         break;
 368                 case 0x4F0:
 369                         strcat(cpu_model, "Am5x86 Write-Back");
 370                         break;
 371                 case 0x500:
 372                         strcat(cpu_model, "K5 model 0");
 373                         tsc_is_broken = 1;
 374                         break;
 375                 case 0x510:
 376                         strcat(cpu_model, "K5 model 1");
 377                         break;
 378                 case 0x520:
 379                         strcat(cpu_model, "K5 PR166 (model 2)");
 380                         break;
 381                 case 0x530:
 382                         strcat(cpu_model, "K5 PR200 (model 3)");
 383                         break;
 384                 case 0x560:
 385                         strcat(cpu_model, "K6");
 386                         break;
 387                 case 0x570:
 388                         strcat(cpu_model, "K6 266 (model 1)");
 389                         break;
 390                 case 0x580:
 391                         strcat(cpu_model, "K6-2");
 392                         break;
 393                 case 0x590:
 394                         strcat(cpu_model, "K6-III");
 395                         break;
 396                 case 0x5a0:
 397                         strcat(cpu_model, "Geode LX");
 398                         /*
 399                          * Make sure the TSC runs through suspension,
 400                          * otherwise we can't use it as timecounter
 401                          */
 402                         wrmsr(0x1900, rdmsr(0x1900) | 0x20ULL);
 403                         break;
 404                 default:
 405                         strcat(cpu_model, "Unknown");
 406                         break;
 407                 }
 408 #if defined(I586_CPU) && defined(CPU_WT_ALLOC)
 409                 if ((cpu_id & 0xf00) == 0x500) {
 410                         if (((cpu_id & 0x0f0) > 0)
 411                             && ((cpu_id & 0x0f0) < 0x60)
 412                             && ((cpu_id & 0x00f) > 3))
 413                                 enable_K5_wt_alloc();
 414                         else if (((cpu_id & 0x0f0) > 0x80)
 415                                  || (((cpu_id & 0x0f0) == 0x80)
 416                                      && (cpu_id & 0x00f) > 0x07))
 417                                 enable_K6_2_wt_alloc();
 418                         else if ((cpu_id & 0x0f0) > 0x50)
 419                                 enable_K6_wt_alloc();
 420                 }
 421 #endif
 422         } else if (cpu_vendor_id == CPU_VENDOR_CYRIX) {
 423                 strcpy(cpu_model, "Cyrix ");
 424                 switch (cpu_id & 0xff0) {
 425                 case 0x440:
 426                         strcat(cpu_model, "MediaGX");
 427                         break;
 428                 case 0x520:
 429                         strcat(cpu_model, "6x86");
 430                         break;
 431                 case 0x540:
 432                         cpu_class = CPUCLASS_586;
 433                         strcat(cpu_model, "GXm");
 434                         break;
 435                 case 0x600:
 436                         strcat(cpu_model, "6x86MX");
 437                         break;
 438                 default:
 439                         /*
 440                          * Even though CPU supports the cpuid
 441                          * instruction, it can be disabled.
 442                          * Therefore, this routine supports all Cyrix
 443                          * CPUs.
 444                          */
 445                         switch (cyrix_did & 0xf0) {
 446                         case 0x00:
 447                                 switch (cyrix_did & 0x0f) {
 448                                 case 0x00:
 449                                         strcat(cpu_model, "486SLC");
 450                                         break;
 451                                 case 0x01:
 452                                         strcat(cpu_model, "486DLC");
 453                                         break;
 454                                 case 0x02:
 455                                         strcat(cpu_model, "486SLC2");
 456                                         break;
 457                                 case 0x03:
 458                                         strcat(cpu_model, "486DLC2");
 459                                         break;
 460                                 case 0x04:
 461                                         strcat(cpu_model, "486SRx");
 462                                         break;
 463                                 case 0x05:
 464                                         strcat(cpu_model, "486DRx");
 465                                         break;
 466                                 case 0x06:
 467                                         strcat(cpu_model, "486SRx2");
 468                                         break;
 469                                 case 0x07:
 470                                         strcat(cpu_model, "486DRx2");
 471                                         break;
 472                                 case 0x08:
 473                                         strcat(cpu_model, "486SRu");
 474                                         break;
 475                                 case 0x09:
 476                                         strcat(cpu_model, "486DRu");
 477                                         break;
 478                                 case 0x0a:
 479                                         strcat(cpu_model, "486SRu2");
 480                                         break;
 481                                 case 0x0b:
 482                                         strcat(cpu_model, "486DRu2");
 483                                         break;
 484                                 default:
 485                                         strcat(cpu_model, "Unknown");
 486                                         break;
 487                                 }
 488                                 break;
 489                         case 0x10:
 490                                 switch (cyrix_did & 0x0f) {
 491                                 case 0x00:
 492                                         strcat(cpu_model, "486S");
 493                                         break;
 494                                 case 0x01:
 495                                         strcat(cpu_model, "486S2");
 496                                         break;
 497                                 case 0x02:
 498                                         strcat(cpu_model, "486Se");
 499                                         break;
 500                                 case 0x03:
 501                                         strcat(cpu_model, "486S2e");
 502                                         break;
 503                                 case 0x0a:
 504                                         strcat(cpu_model, "486DX");
 505                                         break;
 506                                 case 0x0b:
 507                                         strcat(cpu_model, "486DX2");
 508                                         break;
 509                                 case 0x0f:
 510                                         strcat(cpu_model, "486DX4");
 511                                         break;
 512                                 default:
 513                                         strcat(cpu_model, "Unknown");
 514                                         break;
 515                                 }
 516                                 break;
 517                         case 0x20:
 518                                 if ((cyrix_did & 0x0f) < 8)
 519                                         strcat(cpu_model, "6x86");      /* Where did you get it? */
 520                                 else
 521                                         strcat(cpu_model, "5x86");
 522                                 break;
 523                         case 0x30:
 524                                 strcat(cpu_model, "6x86");
 525                                 break;
 526                         case 0x40:
 527                                 if ((cyrix_did & 0xf000) == 0x3000) {
 528                                         cpu_class = CPUCLASS_586;
 529                                         strcat(cpu_model, "GXm");
 530                                 } else
 531                                         strcat(cpu_model, "MediaGX");
 532                                 break;
 533                         case 0x50:
 534                                 strcat(cpu_model, "6x86MX");
 535                                 break;
 536                         case 0xf0:
 537                                 switch (cyrix_did & 0x0f) {
 538                                 case 0x0d:
 539                                         strcat(cpu_model, "Overdrive CPU");
 540                                         break;
 541                                 case 0x0e:
 542                                         strcpy(cpu_model, "Texas Instruments 486SXL");
 543                                         break;
 544                                 case 0x0f:
 545                                         strcat(cpu_model, "486SLC/DLC");
 546                                         break;
 547                                 default:
 548                                         strcat(cpu_model, "Unknown");
 549                                         break;
 550                                 }
 551                                 break;
 552                         default:
 553                                 strcat(cpu_model, "Unknown");
 554                                 break;
 555                         }
 556                         break;
 557                 }
 558         } else if (cpu_vendor_id == CPU_VENDOR_RISE) {
 559                 strcpy(cpu_model, "Rise ");
 560                 switch (cpu_id & 0xff0) {
 561                 case 0x500:
 562                         strcat(cpu_model, "mP6");
 563                         break;
 564                 default:
 565                         strcat(cpu_model, "Unknown");
 566                 }
 567         } else if (cpu_vendor_id == CPU_VENDOR_CENTAUR) {
 568                 switch (cpu_id & 0xff0) {
 569                 case 0x540:
 570                         strcpy(cpu_model, "IDT WinChip C6");
 571                         tsc_is_broken = 1;
 572                         break;
 573                 case 0x580:
 574                         strcpy(cpu_model, "IDT WinChip 2");
 575                         break;
 576                 case 0x660:
 577                         strcpy(cpu_model, "VIA C3 Samuel");
 578                         break;
 579                 case 0x670:
 580                         if (cpu_id & 0x8)
 581                                 strcpy(cpu_model, "VIA C3 Ezra");
 582                         else
 583                                 strcpy(cpu_model, "VIA C3 Samuel 2");
 584                         break;
 585                 case 0x680:
 586                         strcpy(cpu_model, "VIA C3 Ezra-T");
 587                         break;
 588                 case 0x690:
 589                         strcpy(cpu_model, "VIA C3 Nehemiah");
 590                         break;
 591                 case 0x6a0:
 592                 case 0x6d0:
 593                         strcpy(cpu_model, "VIA C7 Esther");
 594                         break;
 595                 case 0x6f0:
 596                         strcpy(cpu_model, "VIA Nano");
 597                         break;
 598                 default:
 599                         strcpy(cpu_model, "VIA/IDT Unknown");
 600                 }
 601         } else if (cpu_vendor_id == CPU_VENDOR_IBM) {
 602                 strcpy(cpu_model, "Blue Lightning CPU");
 603         } else if (cpu_vendor_id == CPU_VENDOR_NSC) {
 604                 switch (cpu_id & 0xfff) {
 605                 case 0x540:
 606                         strcpy(cpu_model, "Geode SC1100");
 607                         cpu = CPU_GEODE1100;
 608                         tsc_is_broken = 1;
 609                         break;
 610                 default:
 611                         strcpy(cpu_model, "Geode/NSC unknown");
 612                         break;
 613                 }
 614         }
 615
 616         /*
 617          * Replace cpu_model with cpu_brand minus leading spaces if
 618          * we have one.
 619          */
 620         brand = cpu_brand;
 621         while (*brand == ' ')
 622                 ++brand;
 623         if (*brand != '\0')
 624                 strcpy(cpu_model, brand);
 625
 626         printf("%s (", cpu_model);
 627         switch(cpu_class) {
 628         case CPUCLASS_286:
 629                 printf("286");
 630                 break;
 631         case CPUCLASS_386:
 632                 printf("386");
 633                 break;
 634 #if defined(I486_CPU)
 635         case CPUCLASS_486:
 636                 printf("486");
 637                 bzero_vector = i486_bzero;
 638                 break;
 639 #endif
 640 #if defined(I586_CPU)
 641         case CPUCLASS_586:
 642                 hw_clockrate = (tsc_freq + 5000) / 1000000;
 643                 printf("%jd.%02d-MHz ",
 644                        (intmax_t)(tsc_freq + 4999) / 1000000,
 645                        (u_int)((tsc_freq + 4999) / 10000) % 100);
 646                 printf("586");
 647                 break;
 648 #endif
 649 #if defined(I686_CPU)
 650         case CPUCLASS_686:
 651                 hw_clockrate = (tsc_freq + 5000) / 1000000;
 652                 printf("%jd.%02d-MHz ",
 653                        (intmax_t)(tsc_freq + 4999) / 1000000,
 654                        (u_int)((tsc_freq + 4999) / 10000) % 100);
 655                 printf("686");
 656                 break;
 657 #endif
 658         default:
 659                 printf("Unknown");      /* will panic below... */
 660         }
 661         printf("-class CPU)\n");
 662         if(*cpu_vendor)
 663                 printf("  Origin = \"%s\"",cpu_vendor);
 664         if(cpu_id)
 665                 printf("  Id = 0x%x", cpu_id);
 666
 667         if (cpu_vendor_id == CPU_VENDOR_INTEL ||
 668             cpu_vendor_id == CPU_VENDOR_AMD ||
 669             cpu_vendor_id == CPU_VENDOR_TRANSMETA ||
 670             cpu_vendor_id == CPU_VENDOR_RISE ||
 671             cpu_vendor_id == CPU_VENDOR_CENTAUR ||
 672             cpu_vendor_id == CPU_VENDOR_NSC ||
 673                 (cpu_vendor_id == CPU_VENDOR_CYRIX &&
 674                  ((cpu_id & 0xf00) > 0x500))) {
 675                 printf("  Family = %x", CPUID_TO_FAMILY(cpu_id));
 676                 printf("  Model = %x", CPUID_TO_MODEL(cpu_id));
 677                 printf("  Stepping = %u", cpu_id & CPUID_STEPPING);
 678                 if (cpu_vendor_id == CPU_VENDOR_CYRIX)
 679                         printf("\n  DIR=0x%04x", cyrix_did);
 680                 if (cpu_high > 0) {
 681
 682                         /*
 683                          * Here we should probably set up flags indicating
 684                          * whether or not various features are available.
 685                          * The interesting ones are probably VME, PSE, PAE,
 686                          * and PGE.  The code already assumes without bothering
 687                          * to check that all CPUs >= Pentium have a TSC and
 688                          * MSRs.
 689                          */
 690                         printf("\n  Features=0x%b", cpu_feature,
 691                         "\020"
 692                         "\001FPU"       /* Integral FPU */
 693                         "\002VME"       /* Extended VM86 mode support */
 694                         "\003DE"        /* Debugging Extensions (CR4.DE) */
 695                         "\004PSE"       /* 4MByte page tables */
 696                         "\005TSC"       /* Timestamp counter */
 697                         "\006MSR"       /* Machine specific registers */
 698                         "\007PAE"       /* Physical address extension */
 699                         "\010MCE"       /* Machine Check support */
 700                         "\011CX8"       /* CMPEXCH8 instruction */
 701                         "\012APIC"      /* SMP local APIC */
 702                         "\013oldMTRR"   /* Previous implementation of MTRR */
 703                         "\014SEP"       /* Fast System Call */
 704                         "\015MTRR"      /* Memory Type Range Registers */
 705                         "\016PGE"       /* PG_G (global bit) support */
 706                         "\017MCA"       /* Machine Check Architecture */
 707                         "\020CMOV"      /* CMOV instruction */
 708                         "\021PAT"       /* Page attributes table */
 709                         "\022PSE36"     /* 36 bit address space support */
 710                         "\023PN"        /* Processor Serial number */
 711                         "\024CLFLUSH"   /* Has the CLFLUSH instruction */
 712                         "\025<b20>"
 713                         "\026DTS"       /* Debug Trace Store */
 714                         "\027ACPI"      /* ACPI support */
 715                         "\030MMX"       /* MMX instructions */
 716                         "\031FXSR"      /* FXSAVE/FXRSTOR */
 717                         "\032SSE"       /* Streaming SIMD Extensions */
 718                         "\033SSE2"      /* Streaming SIMD Extensions #2 */
 719                         "\034SS"        /* Self snoop */
 720                         "\035HTT"       /* Hyperthreading (see EBX bit 16-23) */
 721                         "\036TM"        /* Thermal Monitor clock slowdown */
 722                         "\037IA64"      /* CPU can execute IA64 instructions */
 723                         "\040PBE"       /* Pending Break Enable */
 724                         );
 725
 726                         if (cpu_feature2 != 0) {
 727                                 printf("\n  Features2=0x%b", cpu_feature2,
 728                                 "\020"
 729                                 "\001SSE3"      /* SSE3 */
 730                                 "\002PCLMULQDQ" /* Carry-Less Mul Quadword */
 731                                 "\003DTES64"    /* 64-bit Debug Trace */
 732                                 "\004MON"       /* MONITOR/MWAIT Instructions */
 733                                 "\005DS_CPL"    /* CPL Qualified Debug Store */
 734                                 "\006VMX"       /* Virtual Machine Extensions */
 735                                 "\007SMX"       /* Safer Mode Extensions */
 736                                 "\010EST"       /* Enhanced SpeedStep */
 737                                 "\011TM2"       /* Thermal Monitor 2 */
 738                                 "\012SSSE3"     /* SSSE3 */
 739                                 "\013CNXT-ID"   /* L1 context ID available */
 740                                 "\014<b11>"
 741                                 "\015<b12>"
 742                                 "\016CX16"      /* CMPXCHG16B Instruction */
 743                                 "\017xTPR"      /* Send Task Priority Messages*/
 744                                 "\020PDCM"      /* Perf/Debug Capability MSR */
 745                                 "\021<b16>"
 746                                 "\022<b17>"
 747                                 "\023DCA"       /* Direct Cache Access */
 748                                 "\024SSE4.1"
 749                                 "\025SSE4.2"
 750                                 "\026x2APIC"    /* xAPIC Extensions */
 751                                 "\027MOVBE"
 752                                 "\030POPCNT"
 753                                 "\031<b24>"
 754                                 "\032AESNI"     /* AES Crypto*/
 755                                 "\033XSAVE"
 756                                 "\034OSXSAVE"
 757                                 "\035<b28>"
 758                                 "\036<b29>"
 759                                 "\037<b30>"
 760                                 "\040<b31>"
 761                                 );
 762                         }
 763
 764                         /*
 765                          * AMD64 Architecture Programmer's Manual Volume 3:
 766                          * General-Purpose and System Instructions
 767                          * http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/24594.pdf
 768                          *
 769                          * IA-32 Intel Architecture Software Developer's Manual,
 770                          * Volume 2A: Instruction Set Reference, A-M
 771                          * ftp://download.intel.com/design/Pentium4/manuals/25366617.pdf
 772                          */
 773                         if (amd_feature != 0) {
 774                                 printf("\n  AMD Features=0x%b", amd_feature,
 775                                 "\020"          /* in hex */
 776                                 "\001<s0>"      /* Same */
 777                                 "\002<s1>"      /* Same */
 778                                 "\003<s2>"      /* Same */
 779                                 "\004<s3>"      /* Same */
 780                                 "\005<s4>"      /* Same */
 781                                 "\006<s5>"      /* Same */
 782                                 "\007<s6>"      /* Same */
 783                                 "\010<s7>"      /* Same */
 784                                 "\011<s8>"      /* Same */
 785                                 "\012<s9>"      /* Same */
 786                                 "\013<b10>"     /* Undefined */
 787                                 "\014SYSCALL"   /* Have SYSCALL/SYSRET */
 788                                 "\015<s12>"     /* Same */
 789                                 "\016<s13>"     /* Same */
 790                                 "\017<s14>"     /* Same */
 791                                 "\020<s15>"     /* Same */
 792                                 "\021<s16>"     /* Same */
 793                                 "\022<s17>"     /* Same */
 794                                 "\023<b18>"     /* Reserved, unknown */
 795                                 "\024MP"        /* Multiprocessor Capable */
 796                                 "\025NX"        /* Has EFER.NXE, NX */
 797                                 "\026<b21>"     /* Undefined */
 798                                 "\027MMX+"      /* AMD MMX Extensions */
 799                                 "\030<s23>"     /* Same */
 800                                 "\031<s24>"     /* Same */
 801                                 "\032FFXSR"     /* Fast FXSAVE/FXRSTOR */
 802                                 "\033Page1GB"   /* 1-GB large page support */
 803                                 "\034RDTSCP"    /* RDTSCP */
 804                                 "\035<b28>"     /* Undefined */
 805                                 "\036LM"        /* 64 bit long mode */
 806                                 "\0373DNow!+"   /* AMD 3DNow! Extensions */
 807                                 "\0403DNow!"    /* AMD 3DNow! */
 808                                 );
 809                         }
 810
 811                         if (amd_feature2 != 0) {
 812                                 printf("\n  AMD Features2=0x%b", amd_feature2,
 813                                 "\020"
 814                                 "\001LAHF"      /* LAHF/SAHF in long mode */
 815                                 "\002CMP"       /* CMP legacy */
 816                                 "\003SVM"       /* Secure Virtual Mode */
 817                                 "\004ExtAPIC"   /* Extended APIC register */
 818                                 "\005CR8"       /* CR8 in legacy mode */
 819                                 "\006ABM"       /* LZCNT instruction */
 820                                 "\007SSE4A"     /* SSE4A */
 821                                 "\010MAS"       /* Misaligned SSE mode */
 822                                 "\011Prefetch"  /* 3DNow! Prefetch/PrefetchW */
 823                                 "\012OSVW"      /* OS visible workaround */
 824                                 "\013IBS"       /* Instruction based sampling */
 825                                 "\014SSE5"      /* SSE5 */
 826                                 "\015SKINIT"    /* SKINIT/STGI */
 827                                 "\016WDT"       /* Watchdog timer */
 828                                 "\017<b14>"
 829                                 "\020<b15>"
 830                                 "\021<b16>"
 831                                 "\022<b17>"
 832                                 "\023<b18>"
 833                                 "\024<b19>"
 834                                 "\025<b20>"
 835                                 "\026<b21>"
 836                                 "\027<b22>"
 837                                 "\030<b23>"
 838                                 "\031<b24>"
 839                                 "\032<b25>"
 840                                 "\033<b26>"
 841                                 "\034<b27>"
 842                                 "\035<b28>"
 843                                 "\036<b29>"
 844                                 "\037<b30>"
 845                                 "\040<b31>"
 846                                 );
 847                         }
 848
 849                         if (cpu_vendor_id == CPU_VENDOR_CENTAUR)
 850                                 print_via_padlock_info();
 851
 852                         if ((cpu_feature & CPUID_HTT) &&
 853                             cpu_vendor_id == CPU_VENDOR_AMD)
 854                                 cpu_feature &= ~CPUID_HTT;
 855
 856                         /*
 857                          * If this CPU supports P-state invariant TSC then
 858                          * mention the capability.
 859                          */
 860                         switch (cpu_vendor_id) {
 861                         case CPU_VENDOR_AMD:
 862                                 if ((amd_pminfo & AMDPM_TSC_INVARIANT) ||
 863                                     CPUID_TO_FAMILY(cpu_id) >= 0x10 ||
 864                                     cpu_id == 0x60fb2)
 865                                         tsc_is_invariant = 1;
 866                                 break;
 867                         case CPU_VENDOR_INTEL:
 868                                 if ((amd_pminfo & AMDPM_TSC_INVARIANT) ||
 869                                     (CPUID_TO_FAMILY(cpu_id) == 0x6 &&
 870                                     CPUID_TO_MODEL(cpu_id) >= 0xe) ||
 871                                     (CPUID_TO_FAMILY(cpu_id) == 0xf &&
 872                                     CPUID_TO_MODEL(cpu_id) >= 0x3))
 873                                         tsc_is_invariant = 1;
 874                                 break;
 875                         case CPU_VENDOR_CENTAUR:
 876                                 if (CPUID_TO_FAMILY(cpu_id) == 0x6 &&
 877                                     CPUID_TO_MODEL(cpu_id) >= 0xf &&
 878                                     (rdmsr(0x1203) & 0x100000000ULL) == 0)
 879                                         tsc_is_invariant = 1;
 880                                 break;
 881                         }
 882                         if (tsc_is_invariant)
 883                                 printf("\n  TSC: P-state invariant");
 884
 885                 }
 886         } else if (cpu_vendor_id == CPU_VENDOR_CYRIX) {
 887                 printf("  DIR=0x%04x", cyrix_did);
 888                 printf("  Stepping=%u", (cyrix_did & 0xf000) >> 12);
 889                 printf("  Revision=%u", (cyrix_did & 0x0f00) >> 8);
 890 #ifndef CYRIX_CACHE_REALLY_WORKS
 891                 if (cpu == CPU_M1 && (cyrix_did & 0xff00) < 0x1700)
 892                         printf("\n  CPU cache: write-through mode");
 893 #endif
 894         }
 895
 896         /* Avoid ugly blank lines: only print newline when we have to. */
 897         if (*cpu_vendor || cpu_id)
 898                 printf("\n");
 899
 900         if (!bootverbose)
 901                 return;
 902
 903         if (cpu_vendor_id == CPU_VENDOR_AMD)
 904                 print_AMD_info();
 905         else if (cpu_vendor_id == CPU_VENDOR_INTEL)
 906                 print_INTEL_info();
 907         else if (cpu_vendor_id == CPU_VENDOR_TRANSMETA)
 908                 print_transmeta_info();
 909 }
 910
 911 void
 912 panicifcpuunsupported(void)
 913 {
 914
 915 #if !defined(lint)
 916 #if !defined(I486_CPU) && !defined(I586_CPU) && !defined(I686_CPU)
 917 #error This kernel is not configured for one of the supported CPUs
 918 #endif
 919 #else /* lint */
 920 #endif /* lint */
 921         /*
 922          * Now that we have told the user what they have,
 923          * let them know if that machine type isn't configured.
 924          */
 925         switch (cpu_class) {
 926         case CPUCLASS_286:      /* a 286 should not make it this far, anyway */
 927         case CPUCLASS_386:
 928 #if !defined(I486_CPU)
 929         case CPUCLASS_486:
 930 #endif
 931 #if !defined(I586_CPU)
 932         case CPUCLASS_586:
 933 #endif
 934 #if !defined(I686_CPU)
 935         case CPUCLASS_686:
 936 #endif
 937                 panic("CPU class not configured");
 938         default:
 939                 break;
 940         }
 941 }
 942
 943
 944 static  volatile u_int trap_by_rdmsr;
 945
 946 /*
 947  * Special exception 6 handler.
 948  * The rdmsr instruction generates invalid opcodes fault on 486-class
 949  * Cyrix CPU.  Stacked eip register points the rdmsr instruction in the
 950  * function identblue() when this handler is called.  Stacked eip should
 951  * be advanced.
 952  */
 953 inthand_t       bluetrap6;
 954 #ifdef __GNUCLIKE_ASM
 955 __asm
 956 ("                                                                      \n\
 957         .text                                                           \n\
 958         .p2align 2,0x90                                                 \n\
 959         .type   " __XSTRING(CNAME(bluetrap6)) ",@function               \n\
 960 " __XSTRING(CNAME(bluetrap6)) ":                                        \n\
 961         ss                                                              \n\
 962         movl    $0xa8c1d," __XSTRING(CNAME(trap_by_rdmsr)) "            \n\
 963         addl    $2, (%esp)      /* rdmsr is a 2-byte instruction */     \n\
 964         iret                                                            \n\
 965 ");
 966 #endif
 967
 968 /*
 969  * Special exception 13 handler.
 970  * Accessing non-existent MSR generates general protection fault.
 971  */
 972 inthand_t       bluetrap13;
 973 #ifdef __GNUCLIKE_ASM
 974 __asm
 975 ("                                                                      \n\
 976         .text                                                           \n\
 977         .p2align 2,0x90                                                 \n\
 978         .type   " __XSTRING(CNAME(bluetrap13)) ",@function              \n\
 979 " __XSTRING(CNAME(bluetrap13)) ":                                       \n\
 980         ss                                                              \n\
 981         movl    $0xa89c4," __XSTRING(CNAME(trap_by_rdmsr)) "            \n\
 982         popl    %eax            /* discard error code */                \n\
 983         addl    $2, (%esp)      /* rdmsr is a 2-byte instruction */     \n\
 984         iret                                                            \n\
 985 ");
 986 #endif
 987
 988 /*
 989  * Distinguish IBM Blue Lightning CPU from Cyrix CPUs that does not
 990  * support cpuid instruction.  This function should be called after
 991  * loading interrupt descriptor table register.
 992  *
 993  * I don't like this method that handles fault, but I couldn't get
 994  * information for any other methods.  Does blue giant know?
 995  */
 996 static int
 997 identblue(void)
 998 {
 999
1000         trap_by_rdmsr = 0;
1001
1002         /*
1003          * Cyrix 486-class CPU does not support rdmsr instruction.
1004          * The rdmsr instruction generates invalid opcode fault, and exception
1005          * will be trapped by bluetrap6() on Cyrix 486-class CPU.  The
1006          * bluetrap6() set the magic number to trap_by_rdmsr.
1007          */
1008         setidt(IDT_UD, bluetrap6, SDT_SYS386TGT, SEL_KPL,
1009             GSEL(GCODE_SEL, SEL_KPL));
1010
1011         /*
1012          * Certain BIOS disables cpuid instruction of Cyrix 6x86MX CPU.
1013          * In this case, rdmsr generates general protection fault, and
1014          * exception will be trapped by bluetrap13().
1015          */
1016         setidt(IDT_GP, bluetrap13, SDT_SYS386TGT, SEL_KPL,
1017             GSEL(GCODE_SEL, SEL_KPL));
1018
1019         rdmsr(0x1002);          /* Cyrix CPU generates fault. */
1020
1021         if (trap_by_rdmsr == 0xa8c1d)
1022                 return IDENTBLUE_CYRIX486;
1023         else if (trap_by_rdmsr == 0xa89c4)
1024                 return IDENTBLUE_CYRIXM2;
1025         return IDENTBLUE_IBMCPU;
1026 }
1027
1028
1029 /*
1030  * identifycyrix() set lower 16 bits of cyrix_did as follows:
1031  *
1032  *  F E D C B A 9 8 7 6 5 4 3 2 1 0
1033  * +-------+-------+---------------+
1034  * |  SID  |  RID  |   Device ID   |
1035  * |    (DIR 1)    |    (DIR 0)    |
1036  * +-------+-------+---------------+
1037  */
1038 static void
1039 identifycyrix(void)
1040 {
1041         u_int   eflags;
1042         int     ccr2_test = 0, dir_test = 0;
1043         u_char  ccr2, ccr3;
1044
1045         eflags = read_eflags();
1046         disable_intr();
1047
1048         ccr2 = read_cyrix_reg(CCR2);
1049         write_cyrix_reg(CCR2, ccr2 ^ CCR2_LOCK_NW);
1050         read_cyrix_reg(CCR2);
1051         if (read_cyrix_reg(CCR2) != ccr2)
1052                 ccr2_test = 1;
1053         write_cyrix_reg(CCR2, ccr2);
1054
1055         ccr3 = read_cyrix_reg(CCR3);
1056         write_cyrix_reg(CCR3, ccr3 ^ CCR3_MAPEN3);
1057         read_cyrix_reg(CCR3);
1058         if (read_cyrix_reg(CCR3) != ccr3)
1059                 dir_test = 1;                                   /* CPU supports DIRs. */
1060         write_cyrix_reg(CCR3, ccr3);
1061
1062         if (dir_test) {
1063                 /* Device ID registers are available. */
1064                 cyrix_did = read_cyrix_reg(DIR1) << 8;
1065                 cyrix_did += read_cyrix_reg(DIR0);
1066         } else if (ccr2_test)
1067                 cyrix_did = 0x0010;             /* 486S A-step */
1068         else
1069                 cyrix_did = 0x00ff;             /* Old 486SLC/DLC and TI486SXLC/SXL */
1070
1071         write_eflags(eflags);
1072 }
1073
1074 /* Update TSC freq with the value indicated by the caller. */
1075 static void
1076 tsc_freq_changed(void *arg, const struct cf_level *level, int status)
1077 {
1078         /*
1079          * If there was an error during the transition or
1080          * TSC is P-state invariant, don't do anything.
1081          */
1082         if (status != 0 || tsc_is_invariant)
1083                 return;
1084
1085         /* Total setting for this level gives the new frequency in MHz. */
1086         hw_clockrate = level->total_set.freq;
1087 }
1088
1089 EVENTHANDLER_DEFINE(cpufreq_post_change, tsc_freq_changed, NULL,
1090     EVENTHANDLER_PRI_ANY);
1091
1092 /*
1093  * Final stage of CPU identification. -- Should I check TI?
1094  */
1095 void
1096 finishidentcpu(void)
1097 {
1098         int     isblue = 0;
1099         u_char  ccr3;
1100         u_int   regs[4];
1101
1102         cpu_vendor_id = find_cpu_vendor_id();
1103
1104         /*
1105          * Clear "Limit CPUID Maxval" bit and get the largest standard CPUID
1106          * function number again if it is set from BIOS.  It is necessary
1107          * for probing correct CPU topology later.
1108          * XXX This is only done on the BSP package.
1109          */
1110         if (cpu_vendor_id == CPU_VENDOR_INTEL && cpu_high > 0 && cpu_high < 4 &&
1111             ((CPUID_TO_FAMILY(cpu_id) == 0xf && CPUID_TO_MODEL(cpu_id) >= 0x3) ||
1112             (CPUID_TO_FAMILY(cpu_id) == 0x6 && CPUID_TO_MODEL(cpu_id) >= 0xe))) {
1113                 uint64_t msr;
1114                 msr = rdmsr(MSR_IA32_MISC_ENABLE);
1115                 if ((msr & 0x400000ULL) != 0) {
1116                         wrmsr(MSR_IA32_MISC_ENABLE, msr & ~0x400000ULL);
1117                         do_cpuid(0, regs);
1118                         cpu_high = regs[0];
1119                 }
1120         }
1121
1122         /* Detect AMD features (PTE no-execute bit, 3dnow, 64 bit mode etc) */
1123         if (cpu_vendor_id == CPU_VENDOR_INTEL ||
1124             cpu_vendor_id == CPU_VENDOR_AMD) {
1125                 init_exthigh();
1126                 if (cpu_exthigh >= 0x80000001) {
1127                         do_cpuid(0x80000001, regs);
1128                         amd_feature = regs[3] & ~(cpu_feature & 0x0183f3ff);
1129                         amd_feature2 = regs[2];
1130                 }
1131                 if (cpu_exthigh >= 0x80000007) {
1132                         do_cpuid(0x80000007, regs);
1133                         amd_pminfo = regs[3];
1134                 }
1135                 if (cpu_exthigh >= 0x80000008) {
1136                         do_cpuid(0x80000008, regs);
1137                         cpu_procinfo2 = regs[2];
1138                 }
1139         } else if (cpu_vendor_id == CPU_VENDOR_CYRIX) {
1140                 if (cpu == CPU_486) {
1141                         /*
1142                          * These conditions are equivalent to:
1143                          *     - CPU does not support cpuid instruction.
1144                          *     - Cyrix/IBM CPU is detected.
1145                          */
1146                         isblue = identblue();
1147                         if (isblue == IDENTBLUE_IBMCPU) {
1148                                 strcpy(cpu_vendor, "IBM");
1149                                 cpu_vendor_id = CPU_VENDOR_IBM;
1150                                 cpu = CPU_BLUE;
1151                                 return;
1152                         }
1153                 }
1154                 switch (cpu_id & 0xf00) {
1155                 case 0x600:
1156                         /*
1157                          * Cyrix's datasheet does not describe DIRs.
1158                          * Therefor, I assume it does not have them
1159                          * and use the result of the cpuid instruction.
1160                          * XXX they seem to have it for now at least. -Peter
1161                          */
1162                         identifycyrix();
1163                         cpu = CPU_M2;
1164                         break;
1165                 default:
1166                         identifycyrix();
1167                         /*
1168                          * This routine contains a trick.
1169                          * Don't check (cpu_id & 0x00f0) == 0x50 to detect M2, now.
1170                          */
1171                         switch (cyrix_did & 0x00f0) {
1172                         case 0x00:
1173                         case 0xf0:
1174                                 cpu = CPU_486DLC;
1175                                 break;
1176                         case 0x10:
1177                                 cpu = CPU_CY486DX;
1178                                 break;
1179                         case 0x20:
1180                                 if ((cyrix_did & 0x000f) < 8)
1181                                         cpu = CPU_M1;
1182                                 else
1183                                         cpu = CPU_M1SC;
1184                                 break;
1185                         case 0x30:
1186                                 cpu = CPU_M1;
1187                                 break;
1188                         case 0x40:
1189                                 /* MediaGX CPU */
1190                                 cpu = CPU_M1SC;
1191                                 break;
1192                         default:
1193                                 /* M2 and later CPUs are treated as M2. */
1194                                 cpu = CPU_M2;
1195
1196                                 /*
1197                                  * enable cpuid instruction.
1198                                  */
1199                                 ccr3 = read_cyrix_reg(CCR3);
1200                                 write_cyrix_reg(CCR3, CCR3_MAPEN0);
1201                                 write_cyrix_reg(CCR4, read_cyrix_reg(CCR4) | CCR4_CPUID);
1202                                 write_cyrix_reg(CCR3, ccr3);
1203
1204                                 do_cpuid(0, regs);
1205                                 cpu_high = regs[0];     /* eax */
1206                                 do_cpuid(1, regs);
1207                                 cpu_id = regs[0];       /* eax */
1208                                 cpu_feature = regs[3];  /* edx */
1209                                 break;
1210                         }
1211                 }
1212         } else if (cpu == CPU_486 && *cpu_vendor == '\0') {
1213                 /*
1214                  * There are BlueLightning CPUs that do not change
1215                  * undefined flags by dividing 5 by 2.  In this case,
1216                  * the CPU identification routine in locore.s leaves
1217                  * cpu_vendor null string and puts CPU_486 into the
1218                  * cpu.
1219                  */
1220                 isblue = identblue();
1221                 if (isblue == IDENTBLUE_IBMCPU) {
1222                         strcpy(cpu_vendor, "IBM");
1223                         cpu_vendor_id = CPU_VENDOR_IBM;
1224                         cpu = CPU_BLUE;
1225                         return;
1226                 }
1227         }
1228 }
1229
1230 static u_int
1231 find_cpu_vendor_id(void)
1232 {
1233         int     i;
1234
1235         for (i = 0; i < sizeof(cpu_vendors) / sizeof(cpu_vendors[0]); i++)
1236                 if (strcmp(cpu_vendor, cpu_vendors[i].vendor) == 0)
1237                         return (cpu_vendors[i].vendor_id);
1238         return (0);
1239 }
1240
1241 static void
1242 print_AMD_assoc(int i)
1243 {
1244         if (i == 255)
1245                 printf(", fully associative\n");
1246         else
1247                 printf(", %d-way associative\n", i);
1248 }
1249
1250 static void
1251 print_AMD_info(void)
1252 {
1253         quad_t amd_whcr;
1254
1255         if (cpu_exthigh >= 0x80000005) {
1256                 u_int regs[4];
1257
1258                 do_cpuid(0x80000005, regs);
1259                 printf("Data TLB: %d entries", (regs[1] >> 16) & 0xff);
1260                 print_AMD_assoc(regs[1] >> 24);
1261                 printf("Instruction TLB: %d entries", regs[1] & 0xff);
1262                 print_AMD_assoc((regs[1] >> 8) & 0xff);
1263                 printf("L1 data cache: %d kbytes", regs[2] >> 24);
1264                 printf(", %d bytes/line", regs[2] & 0xff);
1265                 printf(", %d lines/tag", (regs[2] >> 8) & 0xff);
1266                 print_AMD_assoc((regs[2] >> 16) & 0xff);
1267                 printf("L1 instruction cache: %d kbytes", regs[3] >> 24);
1268                 printf(", %d bytes/line", regs[3] & 0xff);
1269                 printf(", %d lines/tag", (regs[3] >> 8) & 0xff);
1270                 print_AMD_assoc((regs[3] >> 16) & 0xff);
1271                 if (cpu_exthigh >= 0x80000006) {        /* K6-III only */
1272                         do_cpuid(0x80000006, regs);
1273                         printf("L2 internal cache: %d kbytes", regs[2] >> 16);
1274                         printf(", %d bytes/line", regs[2] & 0xff);
1275                         printf(", %d lines/tag", (regs[2] >> 8) & 0x0f);
1276                         print_AMD_assoc((regs[2] >> 12) & 0x0f);
1277                 }
1278         }
1279         if (((cpu_id & 0xf00) == 0x500)
1280             && (((cpu_id & 0x0f0) > 0x80)
1281                 || (((cpu_id & 0x0f0) == 0x80)
1282                     && (cpu_id & 0x00f) > 0x07))) {
1283                 /* K6-2(new core [Stepping 8-F]), K6-III or later */
1284                 amd_whcr = rdmsr(0xc0000082);
1285                 if (!(amd_whcr & (0x3ff << 22))) {
1286                         printf("Write Allocate Disable\n");
1287                 } else {
1288                         printf("Write Allocate Enable Limit: %dM bytes\n",
1289                             (u_int32_t)((amd_whcr & (0x3ff << 22)) >> 22) * 4);
1290                         printf("Write Allocate 15-16M bytes: %s\n",
1291                             (amd_whcr & (1 << 16)) ? "Enable" : "Disable");
1292                 }
1293         } else if (((cpu_id & 0xf00) == 0x500)
1294                    && ((cpu_id & 0x0f0) > 0x50)) {
1295                 /* K6, K6-2(old core) */
1296                 amd_whcr = rdmsr(0xc0000082);
1297                 if (!(amd_whcr & (0x7f << 1))) {
1298                         printf("Write Allocate Disable\n");
1299                 } else {
1300                         printf("Write Allocate Enable Limit: %dM bytes\n",
1301                             (u_int32_t)((amd_whcr & (0x7f << 1)) >> 1) * 4);
1302                         printf("Write Allocate 15-16M bytes: %s\n",
1303                             (amd_whcr & 0x0001) ? "Enable" : "Disable");
1304                         printf("Hardware Write Allocate Control: %s\n",
1305                             (amd_whcr & 0x0100) ? "Enable" : "Disable");
1306                 }
1307         }
1308
1309         /*
1310          * Opteron Rev E shows a bug as in very rare occasions a read memory
1311          * barrier is not performed as expected if it is followed by a
1312          * non-atomic read-modify-write instruction.
1313          * As long as that bug pops up very rarely (intensive machine usage
1314          * on other operating systems generally generates one unexplainable
1315          * crash any 2 months) and as long as a model specific fix would be
1316          * impratical at this stage, print out a warning string if the broken
1317          * model and family are identified.
1318          */
1319         if (CPUID_TO_FAMILY(cpu_id) == 0xf && CPUID_TO_MODEL(cpu_id) >= 0x20 &&
1320             CPUID_TO_MODEL(cpu_id) <= 0x3f)
1321                 printf("WARNING: This architecture revision has known SMP "
1322                     "hardware bugs which may cause random instability\n");
1323 }
1324
1325 static void
1326 print_INTEL_info(void)
1327 {
1328         u_int regs[4];
1329         u_int rounds, regnum;
1330         u_int nwaycode, nway;
1331
1332         if (cpu_high >= 2) {
1333                 rounds = 0;
1334                 do {
1335                         do_cpuid(0x2, regs);
1336                         if (rounds == 0 && (rounds = (regs[0] & 0xff)) == 0)
1337                                 break;  /* we have a buggy CPU */
1338
1339                         for (regnum = 0; regnum <= 3; ++regnum) {
1340                                 if (regs[regnum] & (1<<31))
1341                                         continue;
1342                                 if (regnum != 0)
1343                                         print_INTEL_TLB(regs[regnum] & 0xff);
1344                                 print_INTEL_TLB((regs[regnum] >> 8) & 0xff);
1345                                 print_INTEL_TLB((regs[regnum] >> 16) & 0xff);
1346                                 print_INTEL_TLB((regs[regnum] >> 24) & 0xff);
1347                         }
1348                 } while (--rounds > 0);
1349         }
1350
1351         if (cpu_exthigh >= 0x80000006) {
1352                 do_cpuid(0x80000006, regs);
1353                 nwaycode = (regs[2] >> 12) & 0x0f;
1354                 if (nwaycode >= 0x02 && nwaycode <= 0x08)
1355                         nway = 1 << (nwaycode / 2);
1356                 else
1357                         nway = 0;
1358                 printf("\nL2 cache: %u kbytes, %u-way associative, %u bytes/line",
1359                     (regs[2] >> 16) & 0xffff, nway, regs[2] & 0xff);
1360         }
1361
1362         printf("\n");
1363 }
1364
1365 static void
1366 print_INTEL_TLB(u_int data)
1367 {
1368         switch (data) {
1369         case 0x0:
1370         case 0x40:
1371         default:
1372                 break;
1373         case 0x1:
1374                 printf("\nInstruction TLB: 4 KB pages, 4-way set associative, 32 entries");
1375                 break;
1376         case 0x2:
1377                 printf("\nInstruction TLB: 4 MB pages, fully associative, 2 entries");
1378                 break;
1379         case 0x3:
1380                 printf("\nData TLB: 4 KB pages, 4-way set associative, 64 entries");
1381                 break;
1382         case 0x4:
1383                 printf("\nData TLB: 4 MB Pages, 4-way set associative, 8 entries");
1384                 break;
1385         case 0x6:
1386                 printf("\n1st-level instruction cache: 8 KB, 4-way set associative, 32 byte line size");
1387                 break;
1388         case 0x8:
1389                 printf("\n1st-level instruction cache: 16 KB, 4-way set associative, 32 byte line size");
1390                 break;
1391         case 0xa:
1392                 printf("\n1st-level data cache: 8 KB, 2-way set associative, 32 byte line size");
1393                 break;
1394         case 0xc:
1395                 printf("\n1st-level data cache: 16 KB, 4-way set associative, 32 byte line size");
1396                 break;
1397         case 0x22:
1398                 printf("\n3rd-level cache: 512 KB, 4-way set associative, sectored cache, 64 byte line size");
1399                 break;
1400         case 0x23:
1401                 printf("\n3rd-level cache: 1 MB, 8-way set associative, sectored cache, 64 byte line size");
1402                 break;
1403         case 0x25:
1404                 printf("\n3rd-level cache: 2 MB, 8-way set associative, sectored cache, 64 byte line size");
1405                 break;
1406         case 0x29:
1407                 printf("\n3rd-level cache: 4 MB, 8-way set associative, sectored cache, 64 byte line size");
1408                 break;
1409         case 0x2c:
1410                 printf("\n1st-level data cache: 32 KB, 8-way set associative, 64 byte line size");
1411                 break;
1412         case 0x30:
1413                 printf("\n1st-level instruction cache: 32 KB, 8-way set associative, 64 byte line size");
1414                 break;
1415         case 0x39:
1416                 printf("\n2nd-level cache: 128 KB, 4-way set associative, sectored cache, 64 byte line size");
1417                 break;
1418         case 0x3b:
1419                 printf("\n2nd-level cache: 128 KB, 2-way set associative, sectored cache, 64 byte line size");
1420                 break;
1421         case 0x3c:
1422                 printf("\n2nd-level cache: 256 KB, 4-way set associative, sectored cache, 64 byte line size");
1423                 break;
1424         case 0x41:
1425                 printf("\n2nd-level cache: 128 KB, 4-way set associative, 32 byte line size");
1426                 break;
1427         case 0x42:
1428                 printf("\n2nd-level cache: 256 KB, 4-way set associative, 32 byte line size");
1429                 break;
1430         case 0x43:
1431                 printf("\n2nd-level cache: 512 KB, 4-way set associative, 32 byte line size");
1432                 break;
1433         case 0x44:
1434                 printf("\n2nd-level cache: 1 MB, 4-way set associative, 32 byte line size");
1435                 break;
1436         case 0x45:
1437                 printf("\n2nd-level cache: 2 MB, 4-way set associative, 32 byte line size");
1438                 break;
1439         case 0x46:
1440                 printf("\n3rd-level cache: 4 MB, 4-way set associative, 64 byte line size");
1441                 break;
1442         case 0x47:
1443                 printf("\n3rd-level cache: 8 MB, 8-way set associative, 64 byte line size");
1444                 break;
1445         case 0x50:
1446                 printf("\nInstruction TLB: 4 KB, 2 MB or 4 MB pages, fully associative, 64 entries");
1447                 break;
1448         case 0x51:
1449                 printf("\nInstruction TLB: 4 KB, 2 MB or 4 MB pages, fully associative, 128 entries");
1450                 break;
1451         case 0x52:
1452                 printf("\nInstruction TLB: 4 KB, 2 MB or 4 MB pages, fully associative, 256 entries");
1453                 break;
1454         case 0x5b:
1455                 printf("\nData TLB: 4 KB or 4 MB pages, fully associative, 64 entries");
1456                 break;
1457         case 0x5c:
1458                 printf("\nData TLB: 4 KB or 4 MB pages, fully associative, 128 entries");
1459                 break;
1460         case 0x5d:
1461                 printf("\nData TLB: 4 KB or 4 MB pages, fully associative, 256 entries");
1462                 break;
1463         case 0x60:
1464                 printf("\n1st-level data cache: 16 KB, 8-way set associative, sectored cache, 64 byte line size");
1465                 break;
1466         case 0x66:
1467                 printf("\n1st-level data cache: 8 KB, 4-way set associative, sectored cache, 64 byte line size");
1468                 break;
1469         case 0x67:
1470                 printf("\n1st-level data cache: 16 KB, 4-way set associative, sectored cache, 64 byte line size");
1471                 break;
1472         case 0x68:
1473                 printf("\n1st-level data cache: 32 KB, 4 way set associative, sectored cache, 64 byte line size");
1474                 break;
1475         case 0x70:
1476                 printf("\nTrace cache: 12K-uops, 8-way set associative");
1477                 break;
1478         case 0x71:
1479                 printf("\nTrace cache: 16K-uops, 8-way set associative");
1480                 break;
1481         case 0x72:
1482                 printf("\nTrace cache: 32K-uops, 8-way set associative");
1483                 break;
1484         case 0x78:
1485                 printf("\n2nd-level cache: 1 MB, 4-way set associative, 64-byte line size");
1486                 break;
1487         case 0x79:
1488                 printf("\n2nd-level cache: 128 KB, 8-way set associative, sectored cache, 64 byte line size");
1489                 break;
1490         case 0x7a:
1491                 printf("\n2nd-level cache: 256 KB, 8-way set associative, sectored cache, 64 byte line size");
1492                 break;
1493         case 0x7b:
1494                 printf("\n2nd-level cache: 512 KB, 8-way set associative, sectored cache, 64 byte line size");
1495                 break;
1496         case 0x7c:
1497                 printf("\n2nd-level cache: 1 MB, 8-way set associative, sectored cache, 64 byte line size");
1498                 break;
1499         case 0x7d:
1500                 printf("\n2nd-level cache: 2-MB, 8-way set associative, 64-byte line size");
1501                 break;
1502         case 0x7f:
1503                 printf("\n2nd-level cache: 512-KB, 2-way set associative, 64-byte line size");
1504                 break;
1505         case 0x82:
1506                 printf("\n2nd-level cache: 256 KB, 8-way set associative, 32 byte line size");
1507                 break;
1508         case 0x83:
1509                 printf("\n2nd-level cache: 512 KB, 8-way set associative, 32 byte line size");
1510                 break;
1511         case 0x84:
1512                 printf("\n2nd-level cache: 1 MB, 8-way set associative, 32 byte line size");
1513                 break;
1514         case 0x85:
1515                 printf("\n2nd-level cache: 2 MB, 8-way set associative, 32 byte line size");
1516                 break;
1517         case 0x86:
1518                 printf("\n2nd-level cache: 512 KB, 4-way set associative, 64 byte line size");
1519                 break;
1520         case 0x87:
1521                 printf("\n2nd-level cache: 1 MB, 8-way set associative, 64 byte line size");
1522                 break;
1523         case 0xb0:
1524                 printf("\nInstruction TLB: 4 KB Pages, 4-way set associative, 128 entries");
1525                 break;
1526         case 0xb3:
1527                 printf("\nData TLB: 4 KB Pages, 4-way set associative, 128 entries");
1528                 break;
1529         }
1530 }
1531
1532 static void
1533 print_transmeta_info(void)
1534 {
1535         u_int regs[4], nreg = 0;
1536
1537         do_cpuid(0x80860000, regs);
1538         nreg = regs[0];
1539         if (nreg >= 0x80860001) {
1540                 do_cpuid(0x80860001, regs);
1541                 printf("  Processor revision %u.%u.%u.%u\n",
1542                        (regs[1] >> 24) & 0xff,
1543                        (regs[1] >> 16) & 0xff,
1544                        (regs[1] >> 8) & 0xff,
1545                        regs[1] & 0xff);
1546         }
1547         if (nreg >= 0x80860002) {
1548                 do_cpuid(0x80860002, regs);
1549                 printf("  Code Morphing Software revision %u.%u.%u-%u-%u\n",
1550                        (regs[1] >> 24) & 0xff,
1551                        (regs[1] >> 16) & 0xff,
1552                        (regs[1] >> 8) & 0xff,
1553                        regs[1] & 0xff,
1554                        regs[2]);
1555         }
1556         if (nreg >= 0x80860006) {
1557                 char info[65];
1558                 do_cpuid(0x80860003, (u_int*) &info[0]);
1559                 do_cpuid(0x80860004, (u_int*) &info[16]);
1560                 do_cpuid(0x80860005, (u_int*) &info[32]);
1561                 do_cpuid(0x80860006, (u_int*) &info[48]);
1562                 info[64] = 0;
1563                 printf("  %s\n", info);
1564         }
1565 }
1566
1567 static void
1568 print_via_padlock_info(void)
1569 {
1570         u_int regs[4];
1571
1572         /* Check for supported models. */
1573         switch (cpu_id & 0xff0) {
1574         case 0x690:
1575                 if ((cpu_id & 0xf) < 3)
1576                         return;
1577         case 0x6a0:
1578         case 0x6d0:
1579         case 0x6f0:
1580                 break;
1581         default:
1582                 return;
1583         }
1584
1585         do_cpuid(0xc0000000, regs);
1586         if (regs[0] >= 0xc0000001)
1587                 do_cpuid(0xc0000001, regs);
1588         else
1589                 return;
1590
1591         printf("\n  VIA Padlock Features=0x%b", regs[3],
1592         "\020"
1593         "\003RNG"               /* RNG */
1594         "\007AES"               /* ACE */
1595         "\011AES-CTR"           /* ACE2 */
1596         "\013SHA1,SHA256"       /* PHE */
1597         "\015RSA"               /* PMM */
1598         );
1599 }