sys/amd64/amd64/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/frame.h>
  59 #include <machine/intr_machdep.h>
  60 #include <machine/segments.h>
  61 #include <machine/specialreg.h>
  62 #include <machine/md_var.h>
  63
  64 #include <amd64/isa/icu.h>
  65
  66 /* XXX - should be in header file: */
  67 void printcpuinfo(void);
  68 void identify_cpu(void);
  69 void earlysetcpuclass(void);
  70 void panicifcpuunsupported(void);
  71
  72 static u_int find_cpu_vendor_id(void);
  73 static void print_AMD_info(void);
  74 static void print_AMD_assoc(int i);
  75 static void print_via_padlock_info(void);
  76
  77 int     cpu_class;
  78 char machine[] = "amd64";
  79 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD,
  80     machine, 0, "Machine class");
  81
  82 static char cpu_model[128];
  83 SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD,
  84     cpu_model, 0, "Machine model");
  85
  86 static int hw_clockrate;
  87 SYSCTL_INT(_hw, OID_AUTO, clockrate, CTLFLAG_RD,
  88     &hw_clockrate, 0, "CPU instruction clock rate");
  89
  90 static char cpu_brand[48];
  91
  92 static struct {
  93         char    *cpu_name;
  94         int     cpu_class;
  95 } amd64_cpus[] = {
  96         { "Clawhammer",         CPUCLASS_K8 },          /* CPU_CLAWHAMMER */
  97         { "Sledgehammer",       CPUCLASS_K8 },          /* CPU_SLEDGEHAMMER */
  98 };
  99
 100 static struct {
 101         char    *vendor;
 102         u_int   vendor_id;
 103 } cpu_vendors[] = {
 104         { INTEL_VENDOR_ID,      CPU_VENDOR_INTEL },     /* GenuineIntel */
 105         { AMD_VENDOR_ID,        CPU_VENDOR_AMD },       /* AuthenticAMD */
 106         { CENTAUR_VENDOR_ID,    CPU_VENDOR_CENTAUR },   /* CentaurHauls */
 107 };
 108
 109
 110 void
 111 printcpuinfo(void)
 112 {
 113         u_int regs[4], i;
 114         char *brand;
 115
 116         cpu_class = amd64_cpus[cpu].cpu_class;
 117         printf("CPU: ");
 118         strncpy(cpu_model, amd64_cpus[cpu].cpu_name, sizeof (cpu_model));
 119
 120         /* Check for extended CPUID information and a processor name. */
 121         if (cpu_exthigh >= 0x80000004) {
 122                 brand = cpu_brand;
 123                 for (i = 0x80000002; i < 0x80000005; i++) {
 124                         do_cpuid(i, regs);
 125                         memcpy(brand, regs, sizeof(regs));
 126                         brand += sizeof(regs);
 127                 }
 128         }
 129
 130         switch (cpu_vendor_id) {
 131         case CPU_VENDOR_INTEL:
 132                 /* Please make up your mind folks! */
 133                 strcat(cpu_model, "EM64T");
 134                 break;
 135         case CPU_VENDOR_AMD:
 136                 /*
 137                  * Values taken from AMD Processor Recognition
 138                  * http://www.amd.com/K6/k6docs/pdf/20734g.pdf
 139                  * (also describes ``Features'' encodings.
 140                  */
 141                 strcpy(cpu_model, "AMD ");
 142                 if ((cpu_id & 0xf00) == 0xf00)
 143                         strcat(cpu_model, "AMD64 Processor");
 144                 else
 145                         strcat(cpu_model, "Unknown");
 146                 break;
 147         case CPU_VENDOR_CENTAUR:
 148                 strcpy(cpu_model, "VIA ");
 149                 if ((cpu_id & 0xff0) == 0x6f0)
 150                         strcat(cpu_model, "Nano Processor");
 151                 else
 152                         strcat(cpu_model, "Unknown");
 153                 break;
 154         default:
 155                 strcat(cpu_model, "Unknown");
 156                 break;
 157         }
 158
 159         /*
 160          * Replace cpu_model with cpu_brand minus leading spaces if
 161          * we have one.
 162          */
 163         brand = cpu_brand;
 164         while (*brand == ' ')
 165                 ++brand;
 166         if (*brand != '\0')
 167                 strcpy(cpu_model, brand);
 168
 169         printf("%s (", cpu_model);
 170         switch(cpu_class) {
 171         case CPUCLASS_K8:
 172                 hw_clockrate = (tsc_freq + 5000) / 1000000;
 173                 printf("%jd.%02d-MHz ",
 174                        (intmax_t)(tsc_freq + 4999) / 1000000,
 175                        (u_int)((tsc_freq + 4999) / 10000) % 100);
 176                 printf("K8");
 177                 break;
 178         default:
 179                 printf("Unknown");      /* will panic below... */
 180         }
 181         printf("-class CPU)\n");
 182         if (*cpu_vendor)
 183                 printf("  Origin = \"%s\"", cpu_vendor);
 184         if (cpu_id)
 185                 printf("  Id = 0x%x", cpu_id);
 186
 187         if (cpu_vendor_id == CPU_VENDOR_INTEL ||
 188             cpu_vendor_id == CPU_VENDOR_AMD ||
 189             cpu_vendor_id == CPU_VENDOR_CENTAUR) {
 190                 printf("  Stepping = %u", cpu_id & 0xf);
 191                 if (cpu_high > 0) {
 192
 193                         /*
 194                          * Here we should probably set up flags indicating
 195                          * whether or not various features are available.
 196                          * The interesting ones are probably VME, PSE, PAE,
 197                          * and PGE.  The code already assumes without bothering
 198                          * to check that all CPUs >= Pentium have a TSC and
 199                          * MSRs.
 200                          */
 201                         printf("\n  Features=0x%b", cpu_feature,
 202                         "\020"
 203                         "\001FPU"       /* Integral FPU */
 204                         "\002VME"       /* Extended VM86 mode support */
 205                         "\003DE"        /* Debugging Extensions (CR4.DE) */
 206                         "\004PSE"       /* 4MByte page tables */
 207                         "\005TSC"       /* Timestamp counter */
 208                         "\006MSR"       /* Machine specific registers */
 209                         "\007PAE"       /* Physical address extension */
 210                         "\010MCE"       /* Machine Check support */
 211                         "\011CX8"       /* CMPEXCH8 instruction */
 212                         "\012APIC"      /* SMP local APIC */
 213                         "\013oldMTRR"   /* Previous implementation of MTRR */
 214                         "\014SEP"       /* Fast System Call */
 215                         "\015MTRR"      /* Memory Type Range Registers */
 216                         "\016PGE"       /* PG_G (global bit) support */
 217                         "\017MCA"       /* Machine Check Architecture */
 218                         "\020CMOV"      /* CMOV instruction */
 219                         "\021PAT"       /* Page attributes table */
 220                         "\022PSE36"     /* 36 bit address space support */
 221                         "\023PN"        /* Processor Serial number */
 222                         "\024CLFLUSH"   /* Has the CLFLUSH instruction */
 223                         "\025<b20>"
 224                         "\026DTS"       /* Debug Trace Store */
 225                         "\027ACPI"      /* ACPI support */
 226                         "\030MMX"       /* MMX instructions */
 227                         "\031FXSR"      /* FXSAVE/FXRSTOR */
 228                         "\032SSE"       /* Streaming SIMD Extensions */
 229                         "\033SSE2"      /* Streaming SIMD Extensions #2 */
 230                         "\034SS"        /* Self snoop */
 231                         "\035HTT"       /* Hyperthreading (see EBX bit 16-23) */
 232                         "\036TM"        /* Thermal Monitor clock slowdown */
 233                         "\037IA64"      /* CPU can execute IA64 instructions */
 234                         "\040PBE"       /* Pending Break Enable */
 235                         );
 236
 237                         if (cpu_feature2 != 0) {
 238                                 printf("\n  Features2=0x%b", cpu_feature2,
 239                                 "\020"
 240                                 "\001SSE3"      /* SSE3 */
 241                                 "\002<b1>"
 242                                 "\003DTES64"    /* 64-bit Debug Trace */
 243                                 "\004MON"       /* MONITOR/MWAIT Instructions */
 244                                 "\005DS_CPL"    /* CPL Qualified Debug Store */
 245                                 "\006VMX"       /* Virtual Machine Extensions */
 246                                 "\007SMX"       /* Safer Mode Extensions */
 247                                 "\010EST"       /* Enhanced SpeedStep */
 248                                 "\011TM2"       /* Thermal Monitor 2 */
 249                                 "\012SSSE3"     /* SSSE3 */
 250                                 "\013CNXT-ID"   /* L1 context ID available */
 251                                 "\014<b11>"
 252                                 "\015<b12>"
 253                                 "\016CX16"      /* CMPXCHG16B Instruction */
 254                                 "\017xTPR"      /* Send Task Priority Messages*/
 255                                 "\020PDCM"      /* Perf/Debug Capability MSR */
 256                                 "\021<b16>"
 257                                 "\022<b17>"
 258                                 "\023DCA"       /* Direct Cache Access */
 259                                 "\024SSE4.1"
 260                                 "\025SSE4.2"
 261                                 "\026x2APIC"    /* xAPIC Extensions */
 262                                 "\027<b22>"
 263                                 "\030POPCNT"
 264                                 "\031<b24>"
 265                                 "\032<b25>"
 266                                 "\033XSAVE"
 267                                 "\034OSXSAVE"
 268                                 "\035<b28>"
 269                                 "\036<b29>"
 270                                 "\037<b30>"
 271                                 "\040<b31>"
 272                                 );
 273                         }
 274
 275                         /*
 276                          * AMD64 Architecture Programmer's Manual Volume 3:
 277                          * General-Purpose and System Instructions
 278                          * http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/24594.pdf
 279                          *
 280                          * IA-32 Intel Architecture Software Developer's Manual,
 281                          * Volume 2A: Instruction Set Reference, A-M
 282                          * ftp://download.intel.com/design/Pentium4/manuals/25366617.pdf
 283                          */
 284                         if (amd_feature != 0) {
 285                                 printf("\n  AMD Features=0x%b", amd_feature,
 286                                 "\020"          /* in hex */
 287                                 "\001<s0>"      /* Same */
 288                                 "\002<s1>"      /* Same */
 289                                 "\003<s2>"      /* Same */
 290                                 "\004<s3>"      /* Same */
 291                                 "\005<s4>"      /* Same */
 292                                 "\006<s5>"      /* Same */
 293                                 "\007<s6>"      /* Same */
 294                                 "\010<s7>"      /* Same */
 295                                 "\011<s8>"      /* Same */
 296                                 "\012<s9>"      /* Same */
 297                                 "\013<b10>"     /* Undefined */
 298                                 "\014SYSCALL"   /* Have SYSCALL/SYSRET */
 299                                 "\015<s12>"     /* Same */
 300                                 "\016<s13>"     /* Same */
 301                                 "\017<s14>"     /* Same */
 302                                 "\020<s15>"     /* Same */
 303                                 "\021<s16>"     /* Same */
 304                                 "\022<s17>"     /* Same */
 305                                 "\023<b18>"     /* Reserved, unknown */
 306                                 "\024MP"        /* Multiprocessor Capable */
 307                                 "\025NX"        /* Has EFER.NXE, NX */
 308                                 "\026<b21>"     /* Undefined */
 309                                 "\027MMX+"      /* AMD MMX Extensions */
 310                                 "\030<s23>"     /* Same */
 311                                 "\031<s24>"     /* Same */
 312                                 "\032FFXSR"     /* Fast FXSAVE/FXRSTOR */
 313                                 "\033Page1GB"   /* 1-GB large page support */
 314                                 "\034RDTSCP"    /* RDTSCP */
 315                                 "\035<b28>"     /* Undefined */
 316                                 "\036LM"        /* 64 bit long mode */
 317                                 "\0373DNow!+"   /* AMD 3DNow! Extensions */
 318                                 "\0403DNow!"    /* AMD 3DNow! */
 319                                 );
 320                         }
 321
 322                         if (amd_feature2 != 0) {
 323                                 printf("\n  AMD Features2=0x%b", amd_feature2,
 324                                 "\020"
 325                                 "\001LAHF"      /* LAHF/SAHF in long mode */
 326                                 "\002CMP"       /* CMP legacy */
 327                                 "\003SVM"       /* Secure Virtual Mode */
 328                                 "\004ExtAPIC"   /* Extended APIC register */
 329                                 "\005CR8"       /* CR8 in legacy mode */
 330                                 "\006ABM"       /* LZCNT instruction */
 331                                 "\007SSE4A"     /* SSE4A */
 332                                 "\010MAS"       /* Misaligned SSE mode */
 333                                 "\011Prefetch"  /* 3DNow! Prefetch/PrefetchW */
 334                                 "\012OSVW"      /* OS visible workaround */
 335                                 "\013IBS"       /* Instruction based sampling */
 336                                 "\014SSE5"      /* SSE5 */
 337                                 "\015SKINIT"    /* SKINIT/STGI */
 338                                 "\016WDT"       /* Watchdog timer */
 339                                 "\017<b14>"
 340                                 "\020<b15>"
 341                                 "\021<b16>"
 342                                 "\022<b17>"
 343                                 "\023<b18>"
 344                                 "\024<b19>"
 345                                 "\025<b20>"
 346                                 "\026<b21>"
 347                                 "\027<b22>"
 348                                 "\030<b23>"
 349                                 "\031<b24>"
 350                                 "\032<b25>"
 351                                 "\033<b26>"
 352                                 "\034<b27>"
 353                                 "\035<b28>"
 354                                 "\036<b29>"
 355                                 "\037<b30>"
 356                                 "\040<b31>"
 357                                 );
 358                         }
 359
 360                         if (cpu_vendor_id == CPU_VENDOR_CENTAUR)
 361                                 print_via_padlock_info();
 362
 363                         if ((cpu_feature & CPUID_HTT) &&
 364                             cpu_vendor_id == CPU_VENDOR_AMD)
 365                                 cpu_feature &= ~CPUID_HTT;
 366
 367                         /*
 368                          * If this CPU supports P-state invariant TSC then
 369                          * mention the capability.
 370                          */
 371                         switch (cpu_vendor_id) {
 372                         case CPU_VENDOR_AMD:
 373                                 if ((amd_pminfo & AMDPM_TSC_INVARIANT) ||
 374                                     CPUID_TO_FAMILY(cpu_id) >= 0x10 ||
 375                                     cpu_id == 0x60fb2)
 376                                         tsc_is_invariant = 1;
 377                                 break;
 378                         case CPU_VENDOR_INTEL:
 379                                 if ((amd_pminfo & AMDPM_TSC_INVARIANT) ||
 380                                     (CPUID_TO_FAMILY(cpu_id) == 0x6 &&
 381                                     CPUID_TO_MODEL(cpu_id) >= 0xe) ||
 382                                     (CPUID_TO_FAMILY(cpu_id) == 0xf &&
 383                                     CPUID_TO_MODEL(cpu_id) >= 0x3))
 384                                         tsc_is_invariant = 1;
 385                                 break;
 386                         case CPU_VENDOR_CENTAUR:
 387                                 if (CPUID_TO_FAMILY(cpu_id) == 0x6 &&
 388                                     CPUID_TO_MODEL(cpu_id) >= 0xf &&
 389                                     (rdmsr(0x1203) & 0x100000000ULL) == 0)
 390                                         tsc_is_invariant = 1;
 391                                 break;
 392                         }
 393                         if (tsc_is_invariant)
 394                                 printf("\n  TSC: P-state invariant");
 395
 396                 }
 397         }
 398         /* Avoid ugly blank lines: only print newline when we have to. */
 399         if (*cpu_vendor || cpu_id)
 400                 printf("\n");
 401
 402         if (!bootverbose)
 403                 return;
 404
 405         if (cpu_vendor_id == CPU_VENDOR_AMD)
 406                 print_AMD_info();
 407 }
 408
 409 void
 410 panicifcpuunsupported(void)
 411 {
 412
 413 #ifndef HAMMER
 414 #error "You need to specify a cpu type"
 415 #endif
 416         /*
 417          * Now that we have told the user what they have,
 418          * let them know if that machine type isn't configured.
 419          */
 420         switch (cpu_class) {
 421         case CPUCLASS_X86:
 422 #ifndef HAMMER
 423         case CPUCLASS_K8:
 424 #endif
 425                 panic("CPU class not configured");
 426         default:
 427                 break;
 428         }
 429 }
 430
 431
 432 /* Update TSC freq with the value indicated by the caller. */
 433 static void
 434 tsc_freq_changed(void *arg, const struct cf_level *level, int status)
 435 {
 436         /*
 437          * If there was an error during the transition or
 438          * TSC is P-state invariant, don't do anything.
 439          */
 440         if (status != 0 || tsc_is_invariant)
 441                 return;
 442
 443         /* Total setting for this level gives the new frequency in MHz. */
 444         hw_clockrate = level->total_set.freq;
 445 }
 446
 447 EVENTHANDLER_DEFINE(cpufreq_post_change, tsc_freq_changed, NULL,
 448     EVENTHANDLER_PRI_ANY);
 449
 450 /*
 451  * Final stage of CPU identification.
 452  */
 453 void
 454 identify_cpu(void)
 455 {
 456         u_int regs[4];
 457
 458         do_cpuid(0, regs);
 459         cpu_high = regs[0];
 460         ((u_int *)&cpu_vendor)[0] = regs[1];
 461         ((u_int *)&cpu_vendor)[1] = regs[3];
 462         ((u_int *)&cpu_vendor)[2] = regs[2];
 463         cpu_vendor[12] = '\0';
 464         cpu_vendor_id = find_cpu_vendor_id();
 465
 466         do_cpuid(1, regs);
 467         cpu_id = regs[0];
 468         cpu_procinfo = regs[1];
 469         cpu_feature = regs[3];
 470         cpu_feature2 = regs[2];
 471
 472         /*
 473          * Clear "Limit CPUID Maxval" bit and get the largest standard CPUID
 474          * function number again if it is set from BIOS.  It is necessary
 475          * for probing correct CPU topology later.
 476          * XXX This is only done on the BSP package.
 477          */
 478         if (cpu_vendor_id == CPU_VENDOR_INTEL && cpu_high > 0 && cpu_high < 4) {
 479                 uint64_t msr;
 480                 msr = rdmsr(MSR_IA32_MISC_ENABLE);
 481                 if ((msr & 0x400000ULL) != 0) {
 482                         wrmsr(MSR_IA32_MISC_ENABLE, msr & ~0x400000ULL);
 483                         do_cpuid(0, regs);
 484                         cpu_high = regs[0];
 485                 }
 486         }
 487
 488         if (cpu_vendor_id == CPU_VENDOR_INTEL ||
 489             cpu_vendor_id == CPU_VENDOR_AMD ||
 490             cpu_vendor_id == CPU_VENDOR_CENTAUR) {
 491                 do_cpuid(0x80000000, regs);
 492                 cpu_exthigh = regs[0];
 493         }
 494         if (cpu_exthigh >= 0x80000001) {
 495                 do_cpuid(0x80000001, regs);
 496                 amd_feature = regs[3] & ~(cpu_feature & 0x0183f3ff);
 497                 amd_feature2 = regs[2];
 498         }
 499         if (cpu_exthigh >= 0x80000007) {
 500                 do_cpuid(0x80000007, regs);
 501                 amd_pminfo = regs[3];
 502         }
 503         if (cpu_exthigh >= 0x80000008) {
 504                 do_cpuid(0x80000008, regs);
 505                 cpu_procinfo2 = regs[2];
 506         }
 507
 508         /* XXX */
 509         cpu = CPU_CLAWHAMMER;
 510 }
 511
 512 static u_int
 513 find_cpu_vendor_id(void)
 514 {
 515         int     i;
 516
 517         for (i = 0; i < sizeof(cpu_vendors) / sizeof(cpu_vendors[0]); i++)
 518                 if (strcmp(cpu_vendor, cpu_vendors[i].vendor) == 0)
 519                         return (cpu_vendors[i].vendor_id);
 520         return (0);
 521 }
 522
 523 static void
 524 print_AMD_assoc(int i)
 525 {
 526         if (i == 255)
 527                 printf(", fully associative\n");
 528         else
 529                 printf(", %d-way associative\n", i);
 530 }
 531
 532 static void
 533 print_AMD_l2_assoc(int i)
 534 {
 535         switch (i & 0x0f) {
 536         case 0: printf(", disabled/not present\n"); break;
 537         case 1: printf(", direct mapped\n"); break;
 538         case 2: printf(", 2-way associative\n"); break;
 539         case 4: printf(", 4-way associative\n"); break;
 540         case 6: printf(", 8-way associative\n"); break;
 541         case 8: printf(", 16-way associative\n"); break;
 542         case 15: printf(", fully associative\n"); break;
 543         default: printf(", reserved configuration\n"); break;
 544         }
 545 }
 546
 547 static void
 548 print_AMD_info(void)
 549 {
 550         u_int regs[4];
 551
 552         if (cpu_exthigh < 0x80000005)
 553                 return;
 554
 555         do_cpuid(0x80000005, regs);
 556         printf("L1 2MB data TLB: %d entries", (regs[0] >> 16) & 0xff);
 557         print_AMD_assoc(regs[0] >> 24);
 558
 559         printf("L1 2MB instruction TLB: %d entries", regs[0] & 0xff);
 560         print_AMD_assoc((regs[0] >> 8) & 0xff);
 561
 562         printf("L1 4KB data TLB: %d entries", (regs[1] >> 16) & 0xff);
 563         print_AMD_assoc(regs[1] >> 24);
 564
 565         printf("L1 4KB instruction TLB: %d entries", regs[1] & 0xff);
 566         print_AMD_assoc((regs[1] >> 8) & 0xff);
 567
 568         printf("L1 data cache: %d kbytes", regs[2] >> 24);
 569         printf(", %d bytes/line", regs[2] & 0xff);
 570         printf(", %d lines/tag", (regs[2] >> 8) & 0xff);
 571         print_AMD_assoc((regs[2] >> 16) & 0xff);
 572
 573         printf("L1 instruction cache: %d kbytes", regs[3] >> 24);
 574         printf(", %d bytes/line", regs[3] & 0xff);
 575         printf(", %d lines/tag", (regs[3] >> 8) & 0xff);
 576         print_AMD_assoc((regs[3] >> 16) & 0xff);
 577
 578         if (cpu_exthigh >= 0x80000006) {
 579                 do_cpuid(0x80000006, regs);
 580                 if ((regs[0] >> 16) != 0) {
 581                         printf("L2 2MB data TLB: %d entries",
 582                             (regs[0] >> 16) & 0xfff);
 583                         print_AMD_l2_assoc(regs[0] >> 28);
 584                         printf("L2 2MB instruction TLB: %d entries",
 585                             regs[0] & 0xfff);
 586                         print_AMD_l2_assoc((regs[0] >> 28) & 0xf);
 587                 } else {
 588                         printf("L2 2MB unified TLB: %d entries",
 589                             regs[0] & 0xfff);
 590                         print_AMD_l2_assoc((regs[0] >> 28) & 0xf);
 591                 }
 592                 if ((regs[1] >> 16) != 0) {
 593                         printf("L2 4KB data TLB: %d entries",
 594                             (regs[1] >> 16) & 0xfff);
 595                         print_AMD_l2_assoc(regs[1] >> 28);
 596
 597                         printf("L2 4KB instruction TLB: %d entries",
 598                             (regs[1] >> 16) & 0xfff);
 599                         print_AMD_l2_assoc((regs[1] >> 28) & 0xf);
 600                 } else {
 601                         printf("L2 4KB unified TLB: %d entries",
 602                             (regs[1] >> 16) & 0xfff);
 603                         print_AMD_l2_assoc((regs[1] >> 28) & 0xf);
 604                 }
 605                 printf("L2 unified cache: %d kbytes", regs[2] >> 16);
 606                 printf(", %d bytes/line", regs[2] & 0xff);
 607                 printf(", %d lines/tag", (regs[2] >> 8) & 0x0f);
 608                 print_AMD_l2_assoc((regs[2] >> 12) & 0x0f);
 609         }
 610
 611         /*
 612          * Opteron Rev E shows a bug as in very rare occasions a read memory
 613          * barrier is not performed as expected if it is followed by a
 614          * non-atomic read-modify-write instruction.
 615          * As long as that bug pops up very rarely (intensive machine usage
 616          * on other operating systems generally generates one unexplainable
 617          * crash any 2 months) and as long as a model specific fix would be
 618          * impratical at this stage, print out a warning string if the broken
 619          * model and family are identified.
 620          */
 621         if (CPUID_TO_FAMILY(cpu_id) == 0xf && CPUID_TO_MODEL(cpu_id) >= 0x20 &&
 622             CPUID_TO_MODEL(cpu_id) <= 0x3f)
 623                 printf("WARNING: This architecture revision has known SMP "
 624                     "hardware bugs which may cause random instability\n");
 625 }
 626
 627 static void
 628 print_via_padlock_info(void)
 629 {
 630         u_int regs[4];
 631
 632         /* Check for supported models. */
 633         switch (cpu_id & 0xff0) {
 634         case 0x690:
 635                 if ((cpu_id & 0xf) < 3)
 636                         return;
 637         case 0x6a0:
 638         case 0x6d0:
 639         case 0x6f0:
 640                 break;
 641         default:
 642                 return;
 643         }
 644
 645         do_cpuid(0xc0000000, regs);
 646         if (regs[0] >= 0xc0000001)
 647                 do_cpuid(0xc0000001, regs);
 648         else
 649                 return;
 650
 651         printf("\n  VIA Padlock Features=0x%b", regs[3],
 652         "\020"
 653         "\003RNG"               /* RNG */
 654         "\007AES"               /* ACE */
 655         "\011AES-CTR"           /* ACE2 */
 656         "\013SHA1,SHA256"       /* PHE */
 657         "\015RSA"               /* PMM */
 658         );
 659 }