sys/platform/pc32/i386/identcpu.c

   1 /*
   2  * Copyright (c) 1982, 1987, 1990 The Regents of the University of California.
   3  * Copyright (c) 1992 Terrence R. Lambert.
   4  * Copyright (c) 1997 KATO Takenori.
   5  * Copyright (c) 2001 Tamotsu Hattori.
   6  * Copyright (c) 2001 Mitsuru IWASAKI.
   7  * All rights reserved.
   8  *
   9  * This code is derived from software contributed to Berkeley by
  10  * William Jolitz.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. All advertising materials mentioning features or use of this software
  21  *    must display the following acknowledgement:
  22  *      This product includes software developed by the University of
  23  *      California, Berkeley and its contributors.
  24  * 4. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  *
  40  *      from: Id: machdep.c,v 1.193 1996/06/18 01:22:04 bde Exp
  41  * $FreeBSD: src/sys/i386/i386/identcpu.c,v 1.80.2.15 2003/04/11 17:06:41 jhb Exp $
  42  * $DragonFly: src/sys/platform/pc32/i386/identcpu.c,v 1.21 2008/05/10 17:24:07 dillon Exp $
  43  */
  44
  45 #include "opt_cpu.h"
  46
  47 #include <sys/param.h>
  48 #include <sys/systm.h>
  49 #include <sys/kernel.h>
  50 #include <sys/sysctl.h>
  51 #include <sys/lock.h>
  52
  53 #include <machine/asmacros.h>
  54 #include <machine/clock.h>
  55 #include <machine/cputypes.h>
  56 #include <machine/segments.h>
  57 #include <machine/specialreg.h>
  58 #include <machine/md_var.h>
  59
  60 #include <machine_base/isa/intr_machdep.h>
  61
  62 #define IDENTBLUE_CYRIX486      0
  63 #define IDENTBLUE_IBMCPU        1
  64 #define IDENTBLUE_CYRIXM2       2
  65
  66 /* XXX - should be in header file: */
  67 void printcpuinfo(void);
  68 void finishidentcpu(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 #if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
  78 static void print_AMD_features(void);
  79 #endif
  80 static void print_AMD_info(void);
  81 static void print_AMD_assoc(int i);
  82 static void print_transmeta_info(void);
  83 static void setup_tmx86_longrun(void);
  84
  85 int     cpu_class = CPUCLASS_386;
  86 u_int   cpu_exthigh;            /* Highest arg to extended CPUID */
  87 u_int   cyrix_did;              /* Device ID of Cyrix CPU */
  88 char machine[] = MACHINE;
  89 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD,
  90     machine, 0, "Machine class");
  91
  92 static char cpu_model[128];
  93 SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD,
  94     cpu_model, 0, "Machine model");
  95
  96 static char cpu_brand[48];
  97
  98 #define MAX_ADDITIONAL_INFO     16
  99
 100 static const char *additional_cpu_info_ary[MAX_ADDITIONAL_INFO];
 101 static u_int additional_cpu_info_count;
 102
 103 #define MAX_BRAND_INDEX 23
 104
 105 /*
 106  * Brand ID's according to Intel document AP-485, number 241618-31, published
 107  * September 2006, page 42.
 108  */
 109 static const char *cpu_brandtable[MAX_BRAND_INDEX + 1] = {
 110         NULL,                   /* No brand */
 111         "Intel Celeron",
 112         "Intel Pentium III",
 113         "Intel Pentium III Xeon",
 114         "Intel Pentium III",
 115         NULL,                   /* Unspecified */
 116         "Mobile Intel Pentium III-M",
 117         "Mobile Intel Celeron",
 118         "Intel Pentium 4",
 119         "Intel Pentium 4",
 120         "Intel Celeron",
 121         "Intel Xeon",
 122         "Intel Xeon MP",
 123         NULL,                   /* Unspecified */
 124         "Mobile Intel Pentium 4-M",
 125         "Mobile Intel Celeron",
 126         NULL,                   /* Unspecified */
 127         "Mobile Genuine Intel",
 128         "Intel Celeron M",
 129         "Mobile Intel Celeron",
 130         "Intel Celeron",
 131         "Mobile Genuine Intel",
 132         "Intel Pentium M",
 133         "Mobile Intel Celeron"
 134 };
 135
 136 static struct cpu_nameclass i386_cpus[] = {
 137         { "Intel 80286",        CPUCLASS_286 },         /* CPU_286   */
 138         { "i386SX",             CPUCLASS_386 },         /* CPU_386SX */
 139         { "i386DX",             CPUCLASS_386 },         /* CPU_386   */
 140         { "i486SX",             CPUCLASS_486 },         /* CPU_486SX */
 141         { "i486DX",             CPUCLASS_486 },         /* CPU_486   */
 142         { "Pentium",            CPUCLASS_586 },         /* CPU_586   */
 143         { "Cyrix 486",          CPUCLASS_486 },         /* CPU_486DLC */
 144         { "Pentium Pro",        CPUCLASS_686 },         /* CPU_686 */
 145         { "Cyrix 5x86",         CPUCLASS_486 },         /* CPU_M1SC */
 146         { "Cyrix 6x86",         CPUCLASS_486 },         /* CPU_M1 */
 147         { "Blue Lightning",     CPUCLASS_486 },         /* CPU_BLUE */
 148         { "Cyrix 6x86MX",       CPUCLASS_686 },         /* CPU_M2 */
 149         { "NexGen 586",         CPUCLASS_386 },         /* CPU_NX586 (XXX) */
 150         { "Cyrix 486S/DX",      CPUCLASS_486 },         /* CPU_CY486DX */
 151         { "Pentium II",         CPUCLASS_686 },         /* CPU_PII */
 152         { "Pentium III",        CPUCLASS_686 },         /* CPU_PIII */
 153         { "Pentium 4",          CPUCLASS_686 },         /* CPU_P4 */
 154 };
 155
 156 #if defined(I586_CPU) && !defined(NO_F00F_HACK)
 157 int has_f00f_bug = 0;           /* Initialized so that it can be patched. */
 158 #endif
 159
 160 void
 161 printcpuinfo(void)
 162 {
 163 #if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 164         u_int regs[4], i;
 165 #endif
 166         char *brand;
 167
 168         cpu_class = i386_cpus[cpu].cpu_class;
 169         kprintf("CPU: ");
 170         strncpy(cpu_model, i386_cpus[cpu].cpu_name, sizeof (cpu_model));
 171
 172 #if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 173         /* Check for extended CPUID information and a processor name. */
 174         if (cpu_high > 0 &&
 175             (strcmp(cpu_vendor, "GenuineIntel") == 0 ||
 176             strcmp(cpu_vendor, "AuthenticAMD") == 0 ||
 177             strcmp(cpu_vendor, "GenuineTMx86") == 0 ||
 178             strcmp(cpu_vendor, "TransmetaCPU") == 0)) {
 179                 do_cpuid(0x80000000, regs);
 180                 if (regs[0] >= 0x80000000) {
 181                         cpu_exthigh = regs[0];
 182                         if (cpu_exthigh >= 0x80000004) {
 183                                 brand = cpu_brand;
 184                                 for (i = 0x80000002; i < 0x80000005; i++) {
 185                                         do_cpuid(i, regs);
 186                                         memcpy(brand, regs, sizeof(regs));
 187                                         brand += sizeof(regs);
 188                                 }
 189                         }
 190                 }
 191         }
 192
 193         if (strcmp(cpu_vendor, "GenuineIntel") == 0) {
 194                 if ((cpu_id & 0xf00) > 0x300) {
 195                         u_int brand_index;
 196
 197                         cpu_model[0] = '\0';
 198
 199                         switch (cpu_id & 0x3000) {
 200                         case 0x1000:
 201                                 strcpy(cpu_model, "Overdrive ");
 202                                 break;
 203                         case 0x2000:
 204                                 strcpy(cpu_model, "Dual ");
 205                                 break;
 206                         }
 207
 208                         switch (cpu_id & 0xf00) {
 209                         case 0x400:
 210                                 strcat(cpu_model, "i486 ");
 211                                 /* Check the particular flavor of 486 */
 212                                 switch (cpu_id & 0xf0) {
 213                                 case 0x00:
 214                                 case 0x10:
 215                                         strcat(cpu_model, "DX");
 216                                         break;
 217                                 case 0x20:
 218                                         strcat(cpu_model, "SX");
 219                                         break;
 220                                 case 0x30:
 221                                         strcat(cpu_model, "DX2");
 222                                         break;
 223                                 case 0x40:
 224                                         strcat(cpu_model, "SL");
 225                                         break;
 226                                 case 0x50:
 227                                         strcat(cpu_model, "SX2");
 228                                         break;
 229                                 case 0x70:
 230                                         strcat(cpu_model,
 231                                             "DX2 Write-Back Enhanced");
 232                                         break;
 233                                 case 0x80:
 234                                         strcat(cpu_model, "DX4");
 235                                         break;
 236                                 }
 237                                 break;
 238                         case 0x500:
 239                                 /* Check the particular flavor of 586 */
 240                                 strcat(cpu_model, "Pentium");
 241                                 switch (cpu_id & 0xf0) {
 242                                 case 0x00:
 243                                         strcat(cpu_model, " A-step");
 244                                         break;
 245                                 case 0x10:
 246                                         strcat(cpu_model, "/P5");
 247                                         break;
 248                                 case 0x20:
 249                                         strcat(cpu_model, "/P54C");
 250                                         break;
 251                                 case 0x30:
 252                                         strcat(cpu_model, "/P54T Overdrive");
 253                                         break;
 254                                 case 0x40:
 255                                         strcat(cpu_model, "/P55C");
 256                                         break;
 257                                 case 0x70:
 258                                         strcat(cpu_model, "/P54C");
 259                                         break;
 260                                 case 0x80:
 261                                         strcat(cpu_model, "/P55C (quarter-micron)");
 262                                         break;
 263                                 default:
 264                                         /* nothing */
 265                                         break;
 266                                 }
 267 #if defined(I586_CPU) && !defined(NO_F00F_HACK)
 268                                 /*
 269                                  * XXX - If/when Intel fixes the bug, this
 270                                  * should also check the version of the
 271                                  * CPU, not just that it's a Pentium.
 272                                  */
 273                                 has_f00f_bug = 1;
 274 #endif
 275                                 break;
 276                         case 0x600:
 277                                 /* Check the particular flavor of 686 */
 278                                 switch (cpu_id & 0xf0) {
 279                                 case 0x00:
 280                                         strcat(cpu_model, "Pentium Pro A-step");
 281                                         break;
 282                                 case 0x10:
 283                                         strcat(cpu_model, "Pentium Pro");
 284                                         break;
 285                                 case 0x30:
 286                                 case 0x50:
 287                                 case 0x60:
 288                                         strcat(cpu_model,
 289                                 "Pentium II/Pentium II Xeon/Celeron");
 290                                         cpu = CPU_PII;
 291                                         break;
 292                                 case 0x70:
 293                                 case 0x80:
 294                                 case 0xa0:
 295                                 case 0xb0:
 296                                         strcat(cpu_model,
 297                                         "Pentium III/Pentium III Xeon/Celeron");
 298                                         cpu = CPU_PIII;
 299                                         break;
 300                                 default:
 301                                         strcat(cpu_model, "Unknown 80686");
 302                                         break;
 303                                 }
 304                                 break;
 305                         case 0xf00:
 306                                 strcat(cpu_model, "Pentium 4");
 307                                 cpu = CPU_P4;
 308                                 break;
 309                         default:
 310                                 strcat(cpu_model, "unknown");
 311                                 break;
 312                         }
 313
 314                         /*
 315                          * If we didn't get a brand name from the extended
 316                          * CPUID, try to look it up in the brand table.
 317                          */
 318                         if (cpu_high > 0 && *cpu_brand == '\0') {
 319                                 brand_index = cpu_procinfo & CPUID_BRAND_INDEX;
 320                                 if (brand_index <= MAX_BRAND_INDEX &&
 321                                     cpu_brandtable[brand_index] != NULL)
 322                                         strcpy(cpu_brand,
 323                                             cpu_brandtable[brand_index]);
 324                         }
 325                 }
 326         } else if (strcmp(cpu_vendor, "AuthenticAMD") == 0) {
 327                 /*
 328                  * Values taken from AMD Processor Recognition
 329                  * http://www.amd.com/K6/k6docs/pdf/20734g.pdf
 330                  * (also describes ``Features'' encodings.
 331                  */
 332                 strcpy(cpu_model, "AMD ");
 333                 switch (cpu_id & 0xFF0) {
 334                 case 0x410:
 335                         strcat(cpu_model, "Standard Am486DX");
 336                         break;
 337                 case 0x430:
 338                         strcat(cpu_model, "Enhanced Am486DX2 Write-Through");
 339                         break;
 340                 case 0x470:
 341                         strcat(cpu_model, "Enhanced Am486DX2 Write-Back");
 342                         break;
 343                 case 0x480:
 344                         strcat(cpu_model, "Enhanced Am486DX4/Am5x86 Write-Through");
 345                         break;
 346                 case 0x490:
 347                         strcat(cpu_model, "Enhanced Am486DX4/Am5x86 Write-Back");
 348                         break;
 349                 case 0x4E0:
 350                         strcat(cpu_model, "Am5x86 Write-Through");
 351                         break;
 352                 case 0x4F0:
 353                         strcat(cpu_model, "Am5x86 Write-Back");
 354                         break;
 355                 case 0x500:
 356                         strcat(cpu_model, "K5 model 0");
 357                         tsc_is_broken = 1;
 358                         break;
 359                 case 0x510:
 360                         strcat(cpu_model, "K5 model 1");
 361                         break;
 362                 case 0x520:
 363                         strcat(cpu_model, "K5 PR166 (model 2)");
 364                         break;
 365                 case 0x530:
 366                         strcat(cpu_model, "K5 PR200 (model 3)");
 367                         break;
 368                 case 0x560:
 369                         strcat(cpu_model, "K6");
 370                         break;
 371                 case 0x570:
 372                         strcat(cpu_model, "K6 266 (model 1)");
 373                         break;
 374                 case 0x580:
 375                         strcat(cpu_model, "K6-2");
 376                         break;
 377                 case 0x590:
 378                         strcat(cpu_model, "K6-III");
 379                         break;
 380                 default:
 381                         strcat(cpu_model, "Unknown");
 382                         break;
 383                 }
 384 #if defined(I586_CPU) && defined(CPU_WT_ALLOC)
 385                 if ((cpu_id & 0xf00) == 0x500) {
 386                         if (((cpu_id & 0x0f0) > 0)
 387                             && ((cpu_id & 0x0f0) < 0x60)
 388                             && ((cpu_id & 0x00f) > 3))
 389                                 enable_K5_wt_alloc();
 390                         else if (((cpu_id & 0x0f0) > 0x80)
 391                                  || (((cpu_id & 0x0f0) == 0x80)
 392                                      && (cpu_id & 0x00f) > 0x07))
 393                                 enable_K6_2_wt_alloc();
 394                         else if ((cpu_id & 0x0f0) > 0x50)
 395                                 enable_K6_wt_alloc();
 396                 }
 397 #endif
 398         } else if (strcmp(cpu_vendor, "CyrixInstead") == 0) {
 399                 strcpy(cpu_model, "Cyrix ");
 400                 switch (cpu_id & 0xff0) {
 401                 case 0x440:
 402                         strcat(cpu_model, "MediaGX");
 403                         break;
 404                 case 0x520:
 405                         strcat(cpu_model, "6x86");
 406                         break;
 407                 case 0x540:
 408                         cpu_class = CPUCLASS_586;
 409                         strcat(cpu_model, "GXm");
 410                         break;
 411                 case 0x600:
 412                         strcat(cpu_model, "6x86MX");
 413                         break;
 414                 default:
 415                         /*
 416                          * Even though CPU supports the cpuid
 417                          * instruction, it can be disabled.
 418                          * Therefore, this routine supports all Cyrix
 419                          * CPUs.
 420                          */
 421                         switch (cyrix_did & 0xf0) {
 422                         case 0x00:
 423                                 switch (cyrix_did & 0x0f) {
 424                                 case 0x00:
 425                                         strcat(cpu_model, "486SLC");
 426                                         break;
 427                                 case 0x01:
 428                                         strcat(cpu_model, "486DLC");
 429                                         break;
 430                                 case 0x02:
 431                                         strcat(cpu_model, "486SLC2");
 432                                         break;
 433                                 case 0x03:
 434                                         strcat(cpu_model, "486DLC2");
 435                                         break;
 436                                 case 0x04:
 437                                         strcat(cpu_model, "486SRx");
 438                                         break;
 439                                 case 0x05:
 440                                         strcat(cpu_model, "486DRx");
 441                                         break;
 442                                 case 0x06:
 443                                         strcat(cpu_model, "486SRx2");
 444                                         break;
 445                                 case 0x07:
 446                                         strcat(cpu_model, "486DRx2");
 447                                         break;
 448                                 case 0x08:
 449                                         strcat(cpu_model, "486SRu");
 450                                         break;
 451                                 case 0x09:
 452                                         strcat(cpu_model, "486DRu");
 453                                         break;
 454                                 case 0x0a:
 455                                         strcat(cpu_model, "486SRu2");
 456                                         break;
 457                                 case 0x0b:
 458                                         strcat(cpu_model, "486DRu2");
 459                                         break;
 460                                 default:
 461                                         strcat(cpu_model, "Unknown");
 462                                         break;
 463                                 }
 464                                 break;
 465                         case 0x10:
 466                                 switch (cyrix_did & 0x0f) {
 467                                 case 0x00:
 468                                         strcat(cpu_model, "486S");
 469                                         break;
 470                                 case 0x01:
 471                                         strcat(cpu_model, "486S2");
 472                                         break;
 473                                 case 0x02:
 474                                         strcat(cpu_model, "486Se");
 475                                         break;
 476                                 case 0x03:
 477                                         strcat(cpu_model, "486S2e");
 478                                         break;
 479                                 case 0x0a:
 480                                         strcat(cpu_model, "486DX");
 481                                         break;
 482                                 case 0x0b:
 483                                         strcat(cpu_model, "486DX2");
 484                                         break;
 485                                 case 0x0f:
 486                                         strcat(cpu_model, "486DX4");
 487                                         break;
 488                                 default:
 489                                         strcat(cpu_model, "Unknown");
 490                                         break;
 491                                 }
 492                                 break;
 493                         case 0x20:
 494                                 if ((cyrix_did & 0x0f) < 8)
 495                                         strcat(cpu_model, "6x86");      /* Where did you get it? */
 496                                 else
 497                                         strcat(cpu_model, "5x86");
 498                                 break;
 499                         case 0x30:
 500                                 strcat(cpu_model, "6x86");
 501                                 break;
 502                         case 0x40:
 503                                 if ((cyrix_did & 0xf000) == 0x3000) {
 504                                         cpu_class = CPUCLASS_586;
 505                                         strcat(cpu_model, "GXm");
 506                                 } else
 507                                         strcat(cpu_model, "MediaGX");
 508                                 break;
 509                         case 0x50:
 510                                 strcat(cpu_model, "6x86MX");
 511                                 break;
 512                         case 0xf0:
 513                                 switch (cyrix_did & 0x0f) {
 514                                 case 0x0d:
 515                                         strcat(cpu_model, "Overdrive CPU");
 516                                 case 0x0e:
 517                                         strcpy(cpu_model, "Texas Instruments 486SXL");
 518                                         break;
 519                                 case 0x0f:
 520                                         strcat(cpu_model, "486SLC/DLC");
 521                                         break;
 522                                 default:
 523                                         strcat(cpu_model, "Unknown");
 524                                         break;
 525                                 }
 526                                 break;
 527                         default:
 528                                 strcat(cpu_model, "Unknown");
 529                                 break;
 530                         }
 531                         break;
 532                 }
 533         } else if (strcmp(cpu_vendor, "RiseRiseRise") == 0) {
 534                 strcpy(cpu_model, "Rise ");
 535                 switch (cpu_id & 0xff0) {
 536                 case 0x500:
 537                         strcat(cpu_model, "mP6");
 538                         break;
 539                 default:
 540                         strcat(cpu_model, "Unknown");
 541                 }
 542         } else if (strcmp(cpu_vendor, "CentaurHauls") == 0) {
 543                 switch (cpu_id & 0xff0) {
 544                 case 0x540:
 545                         strcpy(cpu_model, "IDT WinChip C6");
 546                         tsc_is_broken = 1;
 547                         break;
 548                 case 0x580:
 549                         strcpy(cpu_model, "IDT WinChip 2");
 550                         break;
 551                 case 0x660:
 552                         strcpy(cpu_model, "VIA C3 Samuel");
 553                         break;
 554                 case 0x670:
 555                         if (cpu_id & 0x8)
 556                                 strcpy(cpu_model, "VIA C3 Ezra");
 557                         else
 558                                 strcpy(cpu_model, "VIA C3 Samuel 2");
 559                         break;
 560                 case 0x680:
 561                         strcpy(cpu_model, "VIA C3 Ezra-T");
 562                         break;
 563                 case 0x690:
 564                         strcpy(cpu_model, "VIA C3 Nehemiah");
 565                         do_cpuid(0xc0000000, regs);
 566                         if (regs[0] == 0xc0000001) {
 567                                 do_cpuid(0xc0000001, regs);
 568                                 if ((cpu_id & 0xf) >= 3)
 569                                         if ((regs[3] & 0x0c) == 0x0c)
 570                                                 strcat(cpu_model, "+RNG");
 571                                 if ((cpu_id & 0xf) >= 8)
 572                                         if ((regs[3] & 0xc0) == 0xc0)
 573                                                 strcat(cpu_model, "+ACE");
 574                         }
 575                         break;
 576                 default:
 577                         strcpy(cpu_model, "VIA/IDT Unknown");
 578                 }
 579         } else if (strcmp(cpu_vendor, "IBM") == 0) {
 580                 strcpy(cpu_model, "Blue Lightning CPU");
 581         }
 582
 583         /*
 584          * Replace cpu_model with cpu_brand minus leading spaces if
 585          * we have one.
 586          */
 587         brand = cpu_brand;
 588         while (*brand == ' ')
 589                 ++brand;
 590         if (*brand != '\0')
 591                 strcpy(cpu_model, brand);
 592
 593 #endif
 594
 595         kprintf("%s (", cpu_model);
 596         switch(cpu_class) {
 597         case CPUCLASS_286:
 598                 kprintf("286");
 599                 break;
 600         case CPUCLASS_386:
 601                 kprintf("386");
 602                 break;
 603 #if defined(I486_CPU)
 604         case CPUCLASS_486:
 605                 kprintf("486");
 606                 /* bzero = i486_bzero; */
 607                 break;
 608 #endif
 609 #if defined(I586_CPU)
 610         case CPUCLASS_586:
 611                 kprintf("%d.%02d-MHz ",
 612                        (int)((tsc_frequency + 4999) / 1000000),
 613                        (int)((tsc_frequency + 4999) / 10000) % 100);
 614                 kprintf("586");
 615                 break;
 616 #endif
 617 #if defined(I686_CPU)
 618         case CPUCLASS_686:
 619                 kprintf("%d.%02d-MHz ",
 620                        ((int)(tsc_frequency + 4999) / 1000000),
 621                        (int)((tsc_frequency + 4999) / 10000) % 100);
 622                 kprintf("686");
 623                 break;
 624 #endif
 625         default:
 626                 kprintf("Unknown");     /* will panic below... */
 627         }
 628         kprintf("-class CPU)\n");
 629 #if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 630         if(*cpu_vendor)
 631                 kprintf("  Origin = \"%s\"",cpu_vendor);
 632         if(cpu_id)
 633                 kprintf("  Id = 0x%x", cpu_id);
 634
 635         if (strcmp(cpu_vendor, "GenuineIntel") == 0 ||
 636             strcmp(cpu_vendor, "AuthenticAMD") == 0 ||
 637             strcmp(cpu_vendor, "RiseRiseRise") == 0 ||
 638             strcmp(cpu_vendor, "CentaurHauls") == 0 ||
 639                 ((strcmp(cpu_vendor, "CyrixInstead") == 0) &&
 640                  ((cpu_id & 0xf00) > 0x500))) {
 641                 kprintf("  Stepping = %u", cpu_id & 0xf);
 642                 if (strcmp(cpu_vendor, "CyrixInstead") == 0)
 643                         kprintf("  DIR=0x%04x", cyrix_did);
 644                 if (cpu_high > 0) {
 645                         /*
 646                          * Here we should probably set up flags indicating
 647                          * whether or not various features are available.
 648                          * The interesting ones are probably VME, PSE, PAE,
 649                          * and PGE.  The code already assumes without bothering
 650                          * to check that all CPUs >= Pentium have a TSC and
 651                          * MSRs.
 652                          */
 653                         kprintf("\n  Features=0x%b", cpu_feature,
 654                         "\020"
 655                         "\001FPU"       /* Integral FPU */
 656                         "\002VME"       /* Extended VM86 mode support */
 657                         "\003DE"        /* Debugging Extensions (CR4.DE) */
 658                         "\004PSE"       /* 4MByte page tables */
 659                         "\005TSC"       /* Timestamp counter */
 660                         "\006MSR"       /* Machine specific registers */
 661                         "\007PAE"       /* Physical address extension */
 662                         "\010MCE"       /* Machine Check support */
 663                         "\011CX8"       /* CMPEXCH8 instruction */
 664                         "\012APIC"      /* SMP local APIC */
 665                         "\013oldMTRR"   /* Previous implementation of MTRR */
 666                         "\014SEP"       /* Fast System Call */
 667                         "\015MTRR"      /* Memory Type Range Registers */
 668                         "\016PGE"       /* PG_G (global bit) support */
 669                         "\017MCA"       /* Machine Check Architecture */
 670                         "\020CMOV"      /* CMOV instruction */
 671                         "\021PAT"       /* Page attributes table */
 672                         "\022PSE36"     /* 36 bit address space support */
 673                         "\023PN"        /* Processor Serial number */
 674                         "\024CLFLUSH"   /* Has the CLFLUSH instruction */
 675                         "\025<b20>"
 676                         "\026DTS"       /* Debug Trace Store */
 677                         "\027ACPI"      /* ACPI support */
 678                         "\030MMX"       /* MMX instructions */
 679                         "\031FXSR"      /* FXSAVE/FXRSTOR */
 680                         "\032SSE"       /* Streaming SIMD Extensions */
 681                         "\033SSE2"      /* Streaming SIMD Extensions #2 */
 682                         "\034SS"        /* Self snoop */
 683                         "\035HTT"       /* Hyperthreading (see EBX bit 16-23) */
 684                         "\036TM"        /* Thermal Monitor clock slowdown */
 685                         "\037IA64"      /* CPU can execute IA64 instructions */
 686                         "\040PBE"       /* Pending Break Enable */
 687                         );
 688
 689                         if (cpu_feature2 != 0) {
 690                                 kprintf("\n  Features2=0x%b", cpu_feature2,
 691                                 "\020"
 692                                 "\001SSE3"      /* SSE3 */
 693                                 "\002<b1>"
 694                                 "\003RSVD2"     /* "Reserved" bit 2 */
 695                                 "\004MON"       /* MONITOR/MWAIT Instructions */
 696                                 "\005DS_CPL"    /* CPL Qualified Debug Store */
 697                                 "\006VMX"       /* Virtual Machine Extensions */
 698                                 "\007<b6>"
 699                                 "\010EST"       /* Enhanced SpeedStep */
 700                                 "\011TM2"       /* Thermal Monitor 2 */
 701                                 "\012SSSE3"     /* Supplemental SSE3 */
 702                                 "\013CNTX-ID"   /* L1 context ID available */
 703                                 "\014<b11>"
 704                                 "\015<b12>"
 705                                 "\016CX16"      /* CMPXCHG16B Instruction */
 706                                 "\017XTPR"      /* Send Task Priority Messages*/
 707                                 "\020RSVD15"    /* "Reserved" bit 15 */
 708                                 "\021<b16>"
 709                                 "\022<b17>"
 710                                 "\023<b18>"
 711                                 "\024<b19>"
 712                                 "\025<b20>"
 713                                 "\026<b21>"
 714                                 "\027<b22>"
 715                                 "\030<b23>"
 716                                 "\031<b24>"
 717                                 "\032<b25>"
 718                                 "\033<b26>"
 719                                 "\034<b27>"
 720                                 "\035<b28>"
 721                                 "\036<b29>"
 722                                 "\037<b30>"
 723                                 "\040<b31>"
 724                                 );
 725                         }
 726
 727                         /*
 728                          * If this CPU supports hyperthreading then mention
 729                          * the number of logical CPU's it contains.
 730                          */
 731                         if (cpu_feature & CPUID_HTT &&
 732                             (cpu_procinfo & CPUID_HTT_CORES) >> 16 > 1)
 733                                 kprintf("\n  Hyperthreading: %d logical CPUs",
 734                                     (cpu_procinfo & CPUID_HTT_CORES) >> 16);
 735                 }
 736                 if (strcmp(cpu_vendor, "AuthenticAMD") == 0 &&
 737                     cpu_exthigh >= 0x80000001)
 738                         print_AMD_features();
 739         } else if (strcmp(cpu_vendor, "CyrixInstead") == 0) {
 740                 kprintf("  DIR=0x%04x", cyrix_did);
 741                 kprintf("  Stepping=%u", (cyrix_did & 0xf000) >> 12);
 742                 kprintf("  Revision=%u", (cyrix_did & 0x0f00) >> 8);
 743 #ifndef CYRIX_CACHE_REALLY_WORKS
 744                 if (cpu == CPU_M1 && (cyrix_did & 0xff00) < 0x1700)
 745                         kprintf("\n  CPU cache: write-through mode");
 746 #endif
 747         }
 748         /* Avoid ugly blank lines: only print newline when we have to. */
 749         if (*cpu_vendor || cpu_id)
 750                 kprintf("\n");
 751
 752 #endif
 753         if (strcmp(cpu_vendor, "GenuineTMx86") == 0 ||
 754             strcmp(cpu_vendor, "TransmetaCPU") == 0) {
 755                 setup_tmx86_longrun();
 756         }
 757
 758         for (i = 0; i < additional_cpu_info_count; ++i) {
 759                 kprintf("  %s\n", additional_cpu_info_ary[i]);
 760         }
 761
 762         if (!bootverbose)
 763                 return;
 764
 765         if (strcmp(cpu_vendor, "AuthenticAMD") == 0)
 766                 print_AMD_info();
 767         else if (strcmp(cpu_vendor, "GenuineTMx86") == 0 ||
 768                  strcmp(cpu_vendor, "TransmetaCPU") == 0)
 769                 print_transmeta_info();
 770
 771 #ifdef I686_CPU
 772         /*
 773          * XXX - Do PPro CPUID level=2 stuff here?
 774          *
 775          * No, but maybe in a print_Intel_info() function called from here.
 776          */
 777 #endif
 778 }
 779
 780 void
 781 panicifcpuunsupported(void)
 782 {
 783
 784 #if !defined(I486_CPU) && !defined(I586_CPU) && !defined(I686_CPU)
 785 #error This kernel is not configured for one of the supported CPUs
 786 #endif
 787         /*
 788          * Now that we have told the user what they have,
 789          * let them know if that machine type isn't configured.
 790          */
 791         switch (cpu_class) {
 792         /*
 793          * A 286 and 386 should not make it this far, anyway.
 794          */
 795         case CPUCLASS_286:
 796         case CPUCLASS_386:
 797 #if !defined(I486_CPU)
 798         case CPUCLASS_486:
 799 #endif
 800 #if !defined(I586_CPU)
 801         case CPUCLASS_586:
 802 #endif
 803 #if !defined(I686_CPU)
 804         case CPUCLASS_686:
 805 #endif
 806                 panic("CPU class not configured");
 807         default:
 808                 break;
 809         }
 810 }
 811
 812
 813 static  volatile u_int trap_by_rdmsr;
 814
 815 /*
 816  * Special exception 6 handler.
 817  * The rdmsr instruction generates invalid opcodes fault on 486-class
 818  * Cyrix CPU.  Stacked eip register points the rdmsr instruction in the
 819  * function identblue() when this handler is called.  Stacked eip should
 820  * be advanced.
 821  */
 822 inthand_t       bluetrap6;
 823
 824 __asm(
 825     "   .text                                                   \n"
 826     "   .p2align 2,0x90                                         \n"
 827     "   .type   " __XSTRING(CNAME(bluetrap6)) ",@function       \n"
 828     __XSTRING(CNAME(bluetrap6)) ":                              \n"
 829     "   ss                                                      \n"
 830     "   movl    $0xa8c1d," __XSTRING(CNAME(trap_by_rdmsr)) "    \n"
 831     "   addl    $2, (%esp)  # I know rdmsr is a 2-bytes instruction.    \n"
 832     "   iret                                                    \n"
 833 );
 834
 835 /*
 836  * Special exception 13 handler.
 837  * Accessing non-existent MSR generates general protection fault.
 838  */
 839 inthand_t       bluetrap13;
 840
 841 __asm(
 842     "   .text                                                   \n"
 843     "   .p2align 2,0x90                                         \n"
 844     "   .type " __XSTRING(CNAME(bluetrap13)) ",@function        \n"
 845     __XSTRING(CNAME(bluetrap13)) ":                             \n"
 846     "   ss                                                      \n"
 847     "   movl    $0xa89c4," __XSTRING(CNAME(trap_by_rdmsr)) "    \n"
 848     "   popl    %eax                    # discard errorcode.    \n"
 849     "   addl    $2, (%esp) # I know rdmsr is a 2-bytes instruction.     \n"
 850     "   iret                                                    \n"
 851 );
 852
 853 /*
 854  * Distinguish IBM Blue Lightning CPU from Cyrix CPUs that does not
 855  * support cpuid instruction.  This function should be called after
 856  * loading interrupt descriptor table register.
 857  *
 858  * I don't like this method that handles fault, but I couldn't get
 859  * information for any other methods.  Does blue giant know?
 860  */
 861 static int
 862 identblue(void)
 863 {
 864
 865         trap_by_rdmsr = 0;
 866
 867         /*
 868          * Cyrix 486-class CPU does not support rdmsr instruction.
 869          * The rdmsr instruction generates invalid opcode fault, and exception
 870          * will be trapped by bluetrap6() on Cyrix 486-class CPU.  The
 871          * bluetrap6() set the magic number to trap_by_rdmsr.
 872          */
 873         setidt(6, bluetrap6, SDT_SYS386TGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL));
 874
 875         /*
 876          * Certain BIOS disables cpuid instruction of Cyrix 6x86MX CPU.
 877          * In this case, rdmsr generates general protection fault, and
 878          * exception will be trapped by bluetrap13().
 879          */
 880         setidt(13, bluetrap13, SDT_SYS386TGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL));
 881
 882         rdmsr(0x1002);          /* Cyrix CPU generates fault. */
 883
 884         if (trap_by_rdmsr == 0xa8c1d)
 885                 return IDENTBLUE_CYRIX486;
 886         else if (trap_by_rdmsr == 0xa89c4)
 887                 return IDENTBLUE_CYRIXM2;
 888         return IDENTBLUE_IBMCPU;
 889 }
 890
 891
 892 /*
 893  * identifycyrix() set lower 16 bits of cyrix_did as follows:
 894  *
 895  *  F E D C B A 9 8 7 6 5 4 3 2 1 0
 896  * +-------+-------+---------------+
 897  * |  SID  |  RID  |   Device ID   |
 898  * |    (DIR 1)    |    (DIR 0)    |
 899  * +-------+-------+---------------+
 900  */
 901 static void
 902 identifycyrix(void)
 903 {
 904         int     ccr2_test = 0, dir_test = 0;
 905         u_char  ccr2, ccr3;
 906
 907         mpintr_lock();
 908
 909         ccr2 = read_cyrix_reg(CCR2);
 910         write_cyrix_reg(CCR2, ccr2 ^ CCR2_LOCK_NW);
 911         read_cyrix_reg(CCR2);
 912         if (read_cyrix_reg(CCR2) != ccr2)
 913                 ccr2_test = 1;
 914         write_cyrix_reg(CCR2, ccr2);
 915
 916         ccr3 = read_cyrix_reg(CCR3);
 917         write_cyrix_reg(CCR3, ccr3 ^ CCR3_MAPEN3);
 918         read_cyrix_reg(CCR3);
 919         if (read_cyrix_reg(CCR3) != ccr3)
 920                 dir_test = 1;                                   /* CPU supports DIRs. */
 921         write_cyrix_reg(CCR3, ccr3);
 922
 923         if (dir_test) {
 924                 /* Device ID registers are available. */
 925                 cyrix_did = read_cyrix_reg(DIR1) << 8;
 926                 cyrix_did += read_cyrix_reg(DIR0);
 927         } else if (ccr2_test)
 928                 cyrix_did = 0x0010;             /* 486S A-step */
 929         else
 930                 cyrix_did = 0x00ff;             /* Old 486SLC/DLC and TI486SXLC/SXL */
 931
 932         mpintr_unlock();
 933 }
 934
 935 /*
 936  * Final stage of CPU identification. -- Should I check TI?
 937  */
 938 void
 939 finishidentcpu(void)
 940 {
 941         int     isblue = 0;
 942         u_char  ccr3;
 943         u_int   regs[4];
 944
 945         if (strcmp(cpu_vendor, "CyrixInstead") == 0) {
 946                 if (cpu == CPU_486) {
 947                         /*
 948                          * These conditions are equivalent to:
 949                          *     - CPU does not support cpuid instruction.
 950                          *     - Cyrix/IBM CPU is detected.
 951                          */
 952                         isblue = identblue();
 953                         if (isblue == IDENTBLUE_IBMCPU) {
 954                                 strcpy(cpu_vendor, "IBM");
 955                                 cpu = CPU_BLUE;
 956                                 return;
 957                         }
 958                 }
 959                 switch (cpu_id & 0xf00) {
 960                 case 0x600:
 961                         /*
 962                          * Cyrix's datasheet does not describe DIRs.
 963                          * Therefor, I assume it does not have them
 964                          * and use the result of the cpuid instruction.
 965                          * XXX they seem to have it for now at least. -Peter
 966                          */
 967                         identifycyrix();
 968                         cpu = CPU_M2;
 969                         break;
 970                 default:
 971                         identifycyrix();
 972                         /*
 973                          * This routine contains a trick.
 974                          * Don't check (cpu_id & 0x00f0) == 0x50 to detect M2, now.
 975                          */
 976                         switch (cyrix_did & 0x00f0) {
 977                         case 0x00:
 978                         case 0xf0:
 979                                 cpu = CPU_486DLC;
 980                                 break;
 981                         case 0x10:
 982                                 cpu = CPU_CY486DX;
 983                                 break;
 984                         case 0x20:
 985                                 if ((cyrix_did & 0x000f) < 8)
 986                                         cpu = CPU_M1;
 987                                 else
 988                                         cpu = CPU_M1SC;
 989                                 break;
 990                         case 0x30:
 991                                 cpu = CPU_M1;
 992                                 break;
 993                         case 0x40:
 994                                 /* MediaGX CPU */
 995                                 cpu = CPU_M1SC;
 996                                 break;
 997                         default:
 998                                 /* M2 and later CPUs are treated as M2. */
 999                                 cpu = CPU_M2;
1000
1001                                 /*
1002                                  * enable cpuid instruction.
1003                                  */
1004                                 ccr3 = read_cyrix_reg(CCR3);
1005                                 write_cyrix_reg(CCR3, CCR3_MAPEN0);
1006                                 write_cyrix_reg(CCR4, read_cyrix_reg(CCR4) | CCR4_CPUID);
1007                                 write_cyrix_reg(CCR3, ccr3);
1008
1009                                 do_cpuid(0, regs);
1010                                 cpu_high = regs[0];     /* eax */
1011                                 do_cpuid(1, regs);
1012                                 cpu_id = regs[0];       /* eax */
1013                                 cpu_feature = regs[3];  /* edx */
1014                                 break;
1015                         }
1016                 }
1017         } else if (cpu == CPU_486 && *cpu_vendor == '\0') {
1018                 /*
1019                  * There are BlueLightning CPUs that do not change
1020                  * undefined flags by dividing 5 by 2.  In this case,
1021                  * the CPU identification routine in locore.s leaves
1022                  * cpu_vendor null string and puts CPU_486 into the
1023                  * cpu.
1024                  */
1025                 isblue = identblue();
1026                 if (isblue == IDENTBLUE_IBMCPU) {
1027                         strcpy(cpu_vendor, "IBM");
1028                         cpu = CPU_BLUE;
1029                         return;
1030                 }
1031         }
1032 }
1033
1034 static void
1035 print_AMD_assoc(int i)
1036 {
1037         if (i == 255)
1038                 kprintf(", fully associative\n");
1039         else
1040                 kprintf(", %d-way associative\n", i);
1041 }
1042
1043 static void
1044 print_AMD_info(void)
1045 {
1046         quad_t amd_whcr;
1047
1048         if (cpu_exthigh >= 0x80000005) {
1049                 u_int regs[4];
1050
1051                 do_cpuid(0x80000005, regs);
1052                 kprintf("Data TLB: %d entries", (regs[1] >> 16) & 0xff);
1053                 print_AMD_assoc(regs[1] >> 24);
1054                 kprintf("Instruction TLB: %d entries", regs[1] & 0xff);
1055                 print_AMD_assoc((regs[1] >> 8) & 0xff);
1056                 kprintf("L1 data cache: %d kbytes", regs[2] >> 24);
1057                 kprintf(", %d bytes/line", regs[2] & 0xff);
1058                 kprintf(", %d lines/tag", (regs[2] >> 8) & 0xff);
1059                 print_AMD_assoc((regs[2] >> 16) & 0xff);
1060                 kprintf("L1 instruction cache: %d kbytes", regs[3] >> 24);
1061                 kprintf(", %d bytes/line", regs[3] & 0xff);
1062                 kprintf(", %d lines/tag", (regs[3] >> 8) & 0xff);
1063                 print_AMD_assoc((regs[3] >> 16) & 0xff);
1064                 if (cpu_exthigh >= 0x80000006) {        /* K6-III, or later */
1065                         do_cpuid(0x80000006, regs);
1066                         /*
1067                          * Report right L2 cache size on Duron rev. A0.
1068                          */
1069                         if ((cpu_id & 0xFF0) == 0x630)
1070                                 kprintf("L2 internal cache: 64 kbytes");
1071                         else
1072                                 kprintf("L2 internal cache: %d kbytes",
1073                                         regs[2] >> 16);
1074
1075                         kprintf(", %d bytes/line", regs[2] & 0xff);
1076                         kprintf(", %d lines/tag", (regs[2] >> 8) & 0x0f);
1077                         print_AMD_assoc((regs[2] >> 12) & 0x0f);
1078                 }
1079         }
1080         if (((cpu_id & 0xf00) == 0x500)
1081             && (((cpu_id & 0x0f0) > 0x80)
1082                 || (((cpu_id & 0x0f0) == 0x80)
1083                     && (cpu_id & 0x00f) > 0x07))) {
1084                 /* K6-2(new core [Stepping 8-F]), K6-III or later */
1085                 amd_whcr = rdmsr(0xc0000082);
1086                 if (!(amd_whcr & (0x3ff << 22))) {
1087                         kprintf("Write Allocate Disable\n");
1088                 } else {
1089                         kprintf("Write Allocate Enable Limit: %dM bytes\n",
1090                             (u_int32_t)((amd_whcr & (0x3ff << 22)) >> 22) * 4);
1091                         kprintf("Write Allocate 15-16M bytes: %s\n",
1092                             (amd_whcr & (1 << 16)) ? "Enable" : "Disable");
1093                 }
1094         } else if (((cpu_id & 0xf00) == 0x500)
1095                    && ((cpu_id & 0x0f0) > 0x50)) {
1096                 /* K6, K6-2(old core) */
1097                 amd_whcr = rdmsr(0xc0000082);
1098                 if (!(amd_whcr & (0x7f << 1))) {
1099                         kprintf("Write Allocate Disable\n");
1100                 } else {
1101                         kprintf("Write Allocate Enable Limit: %dM bytes\n",
1102                             (u_int32_t)((amd_whcr & (0x7f << 1)) >> 1) * 4);
1103                         kprintf("Write Allocate 15-16M bytes: %s\n",
1104                             (amd_whcr & 0x0001) ? "Enable" : "Disable");
1105                         kprintf("Hardware Write Allocate Control: %s\n",
1106                             (amd_whcr & 0x0100) ? "Enable" : "Disable");
1107                 }
1108         }
1109 }
1110
1111 #if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
1112 static void
1113 print_AMD_features(void)
1114 {
1115         u_int regs[4];
1116
1117         /*
1118          * Values taken from AMD Processor Recognition
1119          * http://www.amd.com/products/cpg/athlon/techdocs/pdf/20734.pdf
1120          */
1121         do_cpuid(0x80000001, regs);
1122         kprintf("\n  AMD Features=0x%b", regs[3] &~ cpu_feature,
1123                 "\020"          /* in hex */
1124                 "\001FPU"       /* Integral FPU */
1125                 "\002VME"       /* Extended VM86 mode support */
1126                 "\003DE"        /* Debug extensions */
1127                 "\004PSE"       /* 4MByte page tables */
1128                 "\005TSC"       /* Timestamp counter */
1129                 "\006MSR"       /* Machine specific registers */
1130                 "\007PAE"       /* Physical address extension */
1131                 "\010MCE"       /* Machine Check support */
1132                 "\011CX8"       /* CMPEXCH8 instruction */
1133                 "\012APIC"      /* SMP local APIC */
1134                 "\013<b10>"
1135                 "\014SYSCALL"   /* SYSENTER/SYSEXIT instructions */
1136                 "\015MTRR"      /* Memory Type Range Registers */
1137                 "\016PGE"       /* PG_G (global bit) support */
1138                 "\017MCA"       /* Machine Check Architecture */
1139                 "\020ICMOV"     /* CMOV instruction */
1140                 "\021PAT"       /* Page attributes table */
1141                 "\022PGE36"     /* 36 bit address space support */
1142                 "\023RSVD"      /* Reserved, unknown */
1143                 "\024MP"        /* Multiprocessor Capable */
1144                 "\025NX"        /* No-execute page protection */
1145                 "\026<b21>"
1146                 "\027AMIE"      /* AMD MMX Instruction Extensions */
1147                 "\030MMX"
1148                 "\031FXSAVE"    /* FXSAVE/FXRSTOR */
1149                 "\032<b25>"
1150                 "\033<b26>"
1151                 "\034RDTSCP"    /* RDTSCP instruction */
1152                 "\035<b28>"
1153                 "\036LM"        /* Long mode */
1154                 "\037DSP"       /* AMD 3DNow! Instruction Extensions */
1155                 "\0403DNow!"
1156                 );
1157 }
1158 #endif
1159
1160 /*
1161  * Transmeta Crusoe LongRun Support by Tamotsu Hattori.
1162  */
1163
1164 #define MSR_TMx86_LONGRUN               0x80868010
1165 #define MSR_TMx86_LONGRUN_FLAGS         0x80868011
1166
1167 #define LONGRUN_MODE_MASK(x)            ((x) & 0x000000007f)
1168 #define LONGRUN_MODE_RESERVED(x)        ((x) & 0xffffff80)
1169 #define LONGRUN_MODE_WRITE(x, y)        (LONGRUN_MODE_RESERVED(x) | LONGRUN_MODE_MASK(y))
1170
1171 #define LONGRUN_MODE_MINFREQUENCY       0x00
1172 #define LONGRUN_MODE_ECONOMY            0x01
1173 #define LONGRUN_MODE_PERFORMANCE        0x02
1174 #define LONGRUN_MODE_MAXFREQUENCY       0x03
1175 #define LONGRUN_MODE_UNKNOWN            0x04
1176 #define LONGRUN_MODE_MAX                0x04
1177
1178 union msrinfo {
1179         u_int64_t       msr;
1180         u_int32_t       regs[2];
1181 };
1182
1183 u_int32_t longrun_modes[LONGRUN_MODE_MAX][3] = {
1184         /*  MSR low, MSR high, flags bit0 */
1185         {         0,      0,            0},     /* LONGRUN_MODE_MINFREQUENCY */
1186         {         0,    100,            0},     /* LONGRUN_MODE_ECONOMY */
1187         {         0,    100,            1},     /* LONGRUN_MODE_PERFORMANCE */
1188         {       100,    100,            1},     /* LONGRUN_MODE_MAXFREQUENCY */
1189 };
1190
1191 static u_int
1192 tmx86_get_longrun_mode(void)
1193 {
1194         union msrinfo   msrinfo;
1195         u_int           low, high, flags, mode;
1196
1197         mpintr_lock();
1198
1199         msrinfo.msr = rdmsr(MSR_TMx86_LONGRUN);
1200         low = LONGRUN_MODE_MASK(msrinfo.regs[0]);
1201         high = LONGRUN_MODE_MASK(msrinfo.regs[1]);
1202         flags = rdmsr(MSR_TMx86_LONGRUN_FLAGS) & 0x01;
1203
1204         for (mode = 0; mode < LONGRUN_MODE_MAX; mode++) {
1205                 if (low   == longrun_modes[mode][0] &&
1206                     high  == longrun_modes[mode][1] &&
1207                     flags == longrun_modes[mode][2]) {
1208                         goto out;
1209                 }
1210         }
1211         mode = LONGRUN_MODE_UNKNOWN;
1212 out:
1213         mpintr_unlock();
1214         return (mode);
1215 }
1216
1217 static u_int
1218 tmx86_get_longrun_status(u_int * frequency, u_int * voltage, u_int * percentage)
1219 {
1220         u_int           regs[4];
1221
1222         mpintr_lock();
1223
1224         do_cpuid(0x80860007, regs);
1225         *frequency = regs[0];
1226         *voltage = regs[1];
1227         *percentage = regs[2];
1228
1229         mpintr_unlock();
1230         return (1);
1231 }
1232
1233 static u_int
1234 tmx86_set_longrun_mode(u_int mode)
1235 {
1236         union msrinfo   msrinfo;
1237
1238         if (mode >= LONGRUN_MODE_UNKNOWN) {
1239                 return (0);
1240         }
1241
1242         mpintr_lock();
1243
1244         /* Write LongRun mode values to Model Specific Register. */
1245         msrinfo.msr = rdmsr(MSR_TMx86_LONGRUN);
1246         msrinfo.regs[0] = LONGRUN_MODE_WRITE(msrinfo.regs[0],
1247                                              longrun_modes[mode][0]);
1248         msrinfo.regs[1] = LONGRUN_MODE_WRITE(msrinfo.regs[1],
1249                                              longrun_modes[mode][1]);
1250         wrmsr(MSR_TMx86_LONGRUN, msrinfo.msr);
1251
1252         /* Write LongRun mode flags to Model Specific Register. */
1253         msrinfo.msr = rdmsr(MSR_TMx86_LONGRUN_FLAGS);
1254         msrinfo.regs[0] = (msrinfo.regs[0] & ~0x01) | longrun_modes[mode][2];
1255         wrmsr(MSR_TMx86_LONGRUN_FLAGS, msrinfo.msr);
1256
1257         mpintr_unlock();
1258         return (1);
1259 }
1260
1261 static u_int                     crusoe_longrun;
1262 static u_int                     crusoe_frequency;
1263 static u_int                     crusoe_voltage;
1264 static u_int                     crusoe_percentage;
1265 static struct sysctl_ctx_list    crusoe_sysctl_ctx;
1266 static struct sysctl_oid        *crusoe_sysctl_tree;
1267
1268 static int
1269 tmx86_longrun_sysctl(SYSCTL_HANDLER_ARGS)
1270 {
1271         u_int   mode;
1272         int     error;
1273
1274         crusoe_longrun = tmx86_get_longrun_mode();
1275         mode = crusoe_longrun;
1276         error = sysctl_handle_int(oidp, &mode, 0, req);
1277         if (error || !req->newptr) {
1278                 return (error);
1279         }
1280         if (mode >= LONGRUN_MODE_UNKNOWN) {
1281                 error = EINVAL;
1282                 return (error);
1283         }
1284         if (crusoe_longrun != mode) {
1285                 crusoe_longrun = mode;
1286                 tmx86_set_longrun_mode(crusoe_longrun);
1287         }
1288
1289         return (error);
1290 }
1291
1292 static int
1293 tmx86_status_sysctl(SYSCTL_HANDLER_ARGS)
1294 {
1295         u_int   val;
1296         int     error;
1297
1298         tmx86_get_longrun_status(&crusoe_frequency,
1299                                  &crusoe_voltage, &crusoe_percentage);
1300         val = *(u_int *)oidp->oid_arg1;
1301         error = sysctl_handle_int(oidp, &val, 0, req);
1302         return (error);
1303 }
1304
1305 static void
1306 setup_tmx86_longrun(void)
1307 {
1308         static int      done = 0;
1309
1310         if (done)
1311                 return;
1312         done++;
1313
1314         sysctl_ctx_init(&crusoe_sysctl_ctx);
1315         crusoe_sysctl_tree = SYSCTL_ADD_NODE(&crusoe_sysctl_ctx,
1316                                 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
1317                                 "crusoe", CTLFLAG_RD, 0,
1318                                 "Transmeta Crusoe LongRun support");
1319         SYSCTL_ADD_PROC(&crusoe_sysctl_ctx, SYSCTL_CHILDREN(crusoe_sysctl_tree),
1320                 OID_AUTO, "longrun", CTLTYPE_INT | CTLFLAG_RW,
1321                 &crusoe_longrun, 0, tmx86_longrun_sysctl, "I",
1322                 "LongRun mode [0-3]");
1323         SYSCTL_ADD_PROC(&crusoe_sysctl_ctx, SYSCTL_CHILDREN(crusoe_sysctl_tree),
1324                 OID_AUTO, "frequency", CTLTYPE_INT | CTLFLAG_RD,
1325                 &crusoe_frequency, 0, tmx86_status_sysctl, "I",
1326                 "Current frequency (MHz)");
1327         SYSCTL_ADD_PROC(&crusoe_sysctl_ctx, SYSCTL_CHILDREN(crusoe_sysctl_tree),
1328                 OID_AUTO, "voltage", CTLTYPE_INT | CTLFLAG_RD,
1329                 &crusoe_voltage, 0, tmx86_status_sysctl, "I",
1330                 "Current voltage (mV)");
1331         SYSCTL_ADD_PROC(&crusoe_sysctl_ctx, SYSCTL_CHILDREN(crusoe_sysctl_tree),
1332                 OID_AUTO, "percentage", CTLTYPE_INT | CTLFLAG_RD,
1333                 &crusoe_percentage, 0, tmx86_status_sysctl, "I",
1334                 "Processing performance (%)");
1335 }
1336
1337 static void
1338 print_transmeta_info(void)
1339 {
1340         u_int regs[4], nreg = 0;
1341
1342         do_cpuid(0x80860000, regs);
1343         nreg = regs[0];
1344         if (nreg >= 0x80860001) {
1345                 do_cpuid(0x80860001, regs);
1346                 kprintf("  Processor revision %u.%u.%u.%u\n",
1347                        (regs[1] >> 24) & 0xff,
1348                        (regs[1] >> 16) & 0xff,
1349                        (regs[1] >> 8) & 0xff,
1350                        regs[1] & 0xff);
1351         }
1352         if (nreg >= 0x80860002) {
1353                 do_cpuid(0x80860002, regs);
1354                 kprintf("  Code Morphing Software revision %u.%u.%u-%u-%u\n",
1355                        (regs[1] >> 24) & 0xff,
1356                        (regs[1] >> 16) & 0xff,
1357                        (regs[1] >> 8) & 0xff,
1358                        regs[1] & 0xff,
1359                        regs[2]);
1360         }
1361         if (nreg >= 0x80860006) {
1362                 char info[65];
1363                 do_cpuid(0x80860003, (u_int*) &info[0]);
1364                 do_cpuid(0x80860004, (u_int*) &info[16]);
1365                 do_cpuid(0x80860005, (u_int*) &info[32]);
1366                 do_cpuid(0x80860006, (u_int*) &info[48]);
1367                 info[64] = 0;
1368                 kprintf("  %s\n", info);
1369         }
1370
1371         crusoe_longrun = tmx86_get_longrun_mode();
1372         tmx86_get_longrun_status(&crusoe_frequency,
1373                                  &crusoe_voltage, &crusoe_percentage);
1374         kprintf("  LongRun mode: %d  <%dMHz %dmV %d%%>\n", crusoe_longrun,
1375                crusoe_frequency, crusoe_voltage, crusoe_percentage);
1376 }
1377
1378 void
1379 additional_cpu_info(const char *line)
1380 {
1381         int i;
1382
1383         if ((i = additional_cpu_info_count) < MAX_ADDITIONAL_INFO) {
1384                 additional_cpu_info_ary[i] = line;
1385                 ++additional_cpu_info_count;
1386         }
1387 }
1388