sys/platform/pc64/x86_64/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  * Copyright (c) 2008 The DragonFly Project.
   6  * All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * William Jolitz.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed by the University of
  22  *      California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  *
  39  * from: Id: machdep.c,v 1.193 1996/06/18 01:22:04 bde Exp
  40  */
  41
  42 #include "opt_cpu.h"
  43
  44 #include <sys/param.h>
  45 #include <sys/bus.h>
  46 #include <sys/eventhandler.h>
  47 #include <sys/systm.h>
  48 #include <sys/kernel.h>
  49 #include <sys/sysctl.h>
  50 #include <sys/power.h>
  51
  52 #include <machine/asmacros.h>
  53 #include <machine/clock.h>
  54 #include <machine/cputypes.h>
  55 #include <machine/frame.h>
  56 #include <machine_base/isa/intr_machdep.h>
  57 #include <machine/segments.h>
  58 #include <machine/specialreg.h>
  59 #include <machine/md_var.h>
  60
  61 /* XXX - should be in header file: */
  62 void printcpuinfo(void);
  63 void identify_cpu(void);
  64 void earlysetcpuclass(void);
  65 void panicifcpuunsupported(void);
  66
  67 static u_int find_cpu_vendor_id(void);
  68 static void print_AMD_info(void);
  69 static void print_AMD_assoc(int i);
  70 static void print_via_padlock_info(void);
  71
  72 int     cpu_class;
  73 char machine[] = "x86_64";
  74 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD,
  75     machine, 0, "Machine class");
  76
  77 static char cpu_model[128];
  78 SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD,
  79     cpu_model, 0, "Machine model");
  80
  81 static int hw_clockrate;
  82 SYSCTL_INT(_hw, OID_AUTO, clockrate, CTLFLAG_RD,
  83     &hw_clockrate, 0, "CPU instruction clock rate");
  84
  85 static char cpu_brand[48];
  86
  87 static struct {
  88         char    *cpu_name;
  89         int     cpu_class;
  90 } x86_64_cpus[] = {
  91         { "Clawhammer",         CPUCLASS_K8 },          /* CPU_CLAWHAMMER */
  92         { "Sledgehammer",       CPUCLASS_K8 },          /* CPU_SLEDGEHAMMER */
  93 };
  94
  95 static struct {
  96         char    *vendor;
  97         u_int   vendor_id;
  98 } cpu_vendors[] = {
  99         { INTEL_VENDOR_ID,      CPU_VENDOR_INTEL },     /* GenuineIntel */
 100         { AMD_VENDOR_ID,        CPU_VENDOR_AMD },       /* AuthenticAMD */
 101         { CENTAUR_VENDOR_ID,    CPU_VENDOR_CENTAUR },   /* CentaurHauls */
 102 };
 103
 104 int cpu_cores;
 105 int cpu_logical;
 106
 107
 108 extern int pq_l2size;
 109 extern int pq_l2nways;
 110
 111 void
 112 printcpuinfo(void)
 113 {
 114         u_int regs[4], i;
 115         char *brand;
 116
 117         cpu_class = x86_64_cpus[cpu].cpu_class;
 118         kprintf("CPU: ");
 119         strncpy(cpu_model, x86_64_cpus[cpu].cpu_name, sizeof (cpu_model));
 120
 121         /* Check for extended CPUID information and a processor name. */
 122         if (cpu_exthigh >= 0x80000004) {
 123                 brand = cpu_brand;
 124                 for (i = 0x80000002; i < 0x80000005; i++) {
 125                         do_cpuid(i, regs);
 126                         memcpy(brand, regs, sizeof(regs));
 127                         brand += sizeof(regs);
 128                 }
 129         }
 130
 131         switch (cpu_vendor_id) {
 132         case CPU_VENDOR_INTEL:
 133                 /* Please make up your mind folks! */
 134                 strcat(cpu_model, "EM64T");
 135                 break;
 136         case CPU_VENDOR_AMD:
 137                 /*
 138                  * Values taken from AMD Processor Recognition
 139                  * http://www.amd.com/K6/k6docs/pdf/20734g.pdf
 140                  * (also describes ``Features'' encodings.
 141                  */
 142                 strcpy(cpu_model, "AMD ");
 143                 if ((cpu_id & 0xf00) == 0xf00)
 144                         strcat(cpu_model, "AMD64 Processor");
 145                 else
 146                         strcat(cpu_model, "Unknown");
 147                 break;
 148         case CPU_VENDOR_CENTAUR:
 149                 strcpy(cpu_model, "VIA ");
 150                 if ((cpu_id & 0xff0) == 0x6f0)
 151                         strcat(cpu_model, "Nano Processor");
 152                 else
 153                         strcat(cpu_model, "Unknown");
 154                 break;
 155         default:
 156                 strcat(cpu_model, "Unknown");
 157                 break;
 158         }
 159
 160         /*
 161          * Replace cpu_model with cpu_brand minus leading spaces if
 162          * we have one.
 163          */
 164         brand = cpu_brand;
 165         while (*brand == ' ')
 166                 ++brand;
 167         if (*brand != '\0')
 168                 strcpy(cpu_model, brand);
 169
 170         kprintf("%s (", cpu_model);
 171         switch(cpu_class) {
 172         case CPUCLASS_K8:
 173                 hw_clockrate = (tsc_frequency + 5000) / 1000000;
 174                 kprintf("%jd.%02d-MHz ",
 175                        (intmax_t)(tsc_frequency + 4999) / 1000000,
 176                        (u_int)((tsc_frequency + 4999) / 10000) % 100);
 177                 kprintf("K8");
 178                 break;
 179         default:
 180                 kprintf("Unknown");     /* will panic below... */
 181         }
 182         kprintf("-class CPU)\n");
 183         if (*cpu_vendor)
 184                 kprintf("  Origin = \"%s\"", cpu_vendor);
 185         if (cpu_id)
 186                 kprintf("  Id = 0x%x", cpu_id);
 187
 188         if (cpu_vendor_id == CPU_VENDOR_INTEL ||
 189             cpu_vendor_id == CPU_VENDOR_AMD ||
 190             cpu_vendor_id == CPU_VENDOR_CENTAUR) {
 191                 kprintf("  Stepping = %u", cpu_id & 0xf);
 192                 if (cpu_high > 0) {
 193                         u_int cmp = 1, htt = 1;
 194
 195                         /*
 196                          * Here we should probably set up flags indicating
 197                          * whether or not various features are available.
 198                          * The interesting ones are probably VME, PSE, PAE,
 199                          * and PGE.  The code already assumes without bothering
 200                          * to check that all CPUs >= Pentium have a TSC and
 201                          * MSRs.
 202                          */
 203                         kprintf("\n  Features=0x%b", cpu_feature,
 204                         "\020"
 205                         "\001FPU"       /* Integral FPU */
 206                         "\002VME"       /* Extended VM86 mode support */
 207                         "\003DE"        /* Debugging Extensions (CR4.DE) */
 208                         "\004PSE"       /* 4MByte page tables */
 209                         "\005TSC"       /* Timestamp counter */
 210                         "\006MSR"       /* Machine specific registers */
 211                         "\007PAE"       /* Physical address extension */
 212                         "\010MCE"       /* Machine Check support */
 213                         "\011CX8"       /* CMPEXCH8 instruction */
 214                         "\012APIC"      /* SMP local APIC */
 215                         "\013oldMTRR"   /* Previous implementation of MTRR */
 216                         "\014SEP"       /* Fast System Call */
 217                         "\015MTRR"      /* Memory Type Range Registers */
 218                         "\016PGE"       /* PG_G (global bit) support */
 219                         "\017MCA"       /* Machine Check Architecture */
 220                         "\020CMOV"      /* CMOV instruction */
 221                         "\021PAT"       /* Page attributes table */
 222                         "\022PSE36"     /* 36 bit address space support */
 223                         "\023PN"        /* Processor Serial number */
 224                         "\024CLFLUSH"   /* Has the CLFLUSH instruction */
 225                         "\025<b20>"
 226                         "\026DTS"       /* Debug Trace Store */
 227                         "\027ACPI"      /* ACPI support */
 228                         "\030MMX"       /* MMX instructions */
 229                         "\031FXSR"      /* FXSAVE/FXRSTOR */
 230                         "\032SSE"       /* Streaming SIMD Extensions */
 231                         "\033SSE2"      /* Streaming SIMD Extensions #2 */
 232                         "\034SS"        /* Self snoop */
 233                         "\035HTT"       /* Hyperthreading (see EBX bit 16-23) */
 234                         "\036TM"        /* Thermal Monitor clock slowdown */
 235                         "\037IA64"      /* CPU can execute IA64 instructions */
 236                         "\040PBE"       /* Pending Break Enable */
 237                         );
 238
 239                         if (cpu_feature2 != 0) {
 240                                 kprintf("\n  Features2=0x%b", cpu_feature2,
 241                                 "\020"
 242                                 "\001SSE3"      /* SSE3 */
 243                                 "\002<b1>"
 244                                 "\003DTES64"    /* 64-bit Debug Trace */
 245                                 "\004MON"       /* MONITOR/MWAIT Instructions */
 246                                 "\005DS_CPL"    /* CPL Qualified Debug Store */
 247                                 "\006VMX"       /* Virtual Machine Extensions */
 248                                 "\007SMX"       /* Safer Mode Extensions */
 249                                 "\010EST"       /* Enhanced SpeedStep */
 250                                 "\011TM2"       /* Thermal Monitor 2 */
 251                                 "\012SSSE3"     /* SSSE3 */
 252                                 "\013CNXT-ID"   /* L1 context ID available */
 253                                 "\014<b11>"
 254                                 "\015<b12>"
 255                                 "\016CX16"      /* CMPXCHG16B Instruction */
 256                                 "\017xTPR"      /* Send Task Priority Messages*/
 257                                 "\020PDCM"      /* Perf/Debug Capability MSR */
 258                                 "\021<b16>"
 259                                 "\022<b17>"
 260                                 "\023DCA"       /* Direct Cache Access */
 261                                 "\024SSE4.1"
 262                                 "\025SSE4.2"
 263                                 "\026x2APIC"    /* xAPIC Extensions */
 264                                 "\027MOVBE"     /* MOVBE instruction */
 265                                 "\030POPCNT"
 266                                 "\031<b24>"
 267                                 "\032<b25>"
 268                                 "\033XSAVE"
 269                                 "\034OSXSAVE"
 270                                 "\035<b28>"
 271                                 "\036<b29>"
 272                                 "\037<b30>"
 273                                 "\040<b31>"
 274                                 );
 275                         }
 276
 277                         /*
 278                          * AMD64 Architecture Programmer's Manual Volume 3:
 279                          * General-Purpose and System Instructions
 280                          * http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/24594.pdf
 281                          *
 282                          * IA-32 Intel Architecture Software Developer's Manual,
 283                          * Volume 2A: Instruction Set Reference, A-M
 284                          * ftp://download.intel.com/design/Pentium4/manuals/25366617.pdf
 285                          */
 286                         if (amd_feature != 0) {
 287                                 kprintf("\n  AMD Features=0x%b", amd_feature,
 288                                 "\020"          /* in hex */
 289                                 "\001<s0>"      /* Same */
 290                                 "\002<s1>"      /* Same */
 291                                 "\003<s2>"      /* Same */
 292                                 "\004<s3>"      /* Same */
 293                                 "\005<s4>"      /* Same */
 294                                 "\006<s5>"      /* Same */
 295                                 "\007<s6>"      /* Same */
 296                                 "\010<s7>"      /* Same */
 297                                 "\011<s8>"      /* Same */
 298                                 "\012<s9>"      /* Same */
 299                                 "\013<b10>"     /* Undefined */
 300                                 "\014SYSCALL"   /* Have SYSCALL/SYSRET */
 301                                 "\015<s12>"     /* Same */
 302                                 "\016<s13>"     /* Same */
 303                                 "\017<s14>"     /* Same */
 304                                 "\020<s15>"     /* Same */
 305                                 "\021<s16>"     /* Same */
 306                                 "\022<s17>"     /* Same */
 307                                 "\023<b18>"     /* Reserved, unknown */
 308                                 "\024MP"        /* Multiprocessor Capable */
 309                                 "\025NX"        /* Has EFER.NXE, NX */
 310                                 "\026<b21>"     /* Undefined */
 311                                 "\027MMX+"      /* AMD MMX Extensions */
 312                                 "\030<s23>"     /* Same */
 313                                 "\031<s24>"     /* Same */
 314                                 "\032FFXSR"     /* Fast FXSAVE/FXRSTOR */
 315                                 "\033Page1GB"   /* 1-GB large page support */
 316                                 "\034RDTSCP"    /* RDTSCP */
 317                                 "\035<b28>"     /* Undefined */
 318                                 "\036LM"        /* 64 bit long mode */
 319                                 "\0373DNow!+"   /* AMD 3DNow! Extensions */
 320                                 "\0403DNow!"    /* AMD 3DNow! */
 321                                 );
 322                         }
 323
 324                         if (amd_feature2 != 0) {
 325                                 kprintf("\n  AMD Features2=0x%b", amd_feature2,
 326                                 "\020"
 327                                 "\001LAHF"      /* LAHF/SAHF in long mode */
 328                                 "\002CMP"       /* CMP legacy */
 329                                 "\003SVM"       /* Secure Virtual Mode */
 330                                 "\004ExtAPIC"   /* Extended APIC register */
 331                                 "\005CR8"       /* CR8 in legacy mode */
 332                                 "\006ABM"       /* LZCNT instruction */
 333                                 "\007SSE4A"     /* SSE4A */
 334                                 "\010MAS"       /* Misaligned SSE mode */
 335                                 "\011Prefetch"  /* 3DNow! Prefetch/PrefetchW */
 336                                 "\012OSVW"      /* OS visible workaround */
 337                                 "\013IBS"       /* Instruction based sampling */
 338                                 "\014SSE5"      /* SSE5 */
 339                                 "\015SKINIT"    /* SKINIT/STGI */
 340                                 "\016WDT"       /* Watchdog timer */
 341                                 "\017<b14>"
 342                                 "\020<b15>"
 343                                 "\021<b16>"
 344                                 "\022<b17>"
 345                                 "\023<b18>"
 346                                 "\024<b19>"
 347                                 "\025<b20>"
 348                                 "\026<b21>"
 349                                 "\027<b22>"
 350                                 "\030<b23>"
 351                                 "\031<b24>"
 352                                 "\032<b25>"
 353                                 "\033<b26>"
 354                                 "\034<b27>"
 355                                 "\035<b28>"
 356                                 "\036<b29>"
 357                                 "\037<b30>"
 358                                 "\040<b31>"
 359                                 );
 360                         }
 361
 362                         if (cpu_vendor_id == CPU_VENDOR_CENTAUR)
 363                                 print_via_padlock_info();
 364
 365                         if ((cpu_feature & CPUID_HTT) &&
 366                             cpu_vendor_id == CPU_VENDOR_AMD)
 367                                 cpu_feature &= ~CPUID_HTT;
 368
 369                         /*
 370                          * If this CPU supports HTT or CMP then mention the
 371                          * number of physical/logical cores it contains.
 372                          */
 373                         if (cpu_feature & CPUID_HTT)
 374                                 htt = (cpu_procinfo & CPUID_HTT_CORES) >> 16;
 375                         if (cpu_vendor_id == CPU_VENDOR_AMD &&
 376                             (amd_feature2 & AMDID2_CMP))
 377                                 cmp = (cpu_procinfo2 & AMDID_CMP_CORES) + 1;
 378                         else if (cpu_vendor_id == CPU_VENDOR_INTEL &&
 379                             (cpu_high >= 4)) {
 380                                 cpuid_count(4, 0, regs);
 381                                 if ((regs[0] & 0x1f) != 0)
 382                                         cmp = ((regs[0] >> 26) & 0x3f) + 1;
 383                         }
 384                         cpu_cores = cmp;
 385                         cpu_logical = htt / cmp;
 386                         if (cmp > 1)
 387                                 kprintf("\n  Cores per package: %d", cmp);
 388                         if ((htt / cmp) > 1)
 389                                 kprintf("\n  Logical CPUs per core: %d",
 390                                     cpu_logical);
 391                 }
 392         }
 393         /* Avoid ugly blank lines: only print newline when we have to. */
 394         if (*cpu_vendor || cpu_id)
 395                 kprintf("\n");
 396
 397         if (!bootverbose)
 398                 return;
 399
 400         if (cpu_vendor_id == CPU_VENDOR_AMD)
 401                 print_AMD_info();
 402 }
 403
 404 void
 405 panicifcpuunsupported(void)
 406 {
 407
 408 #ifndef HAMMER_CPU
 409 #error "You need to specify a cpu type"
 410 #endif
 411         /*
 412          * Now that we have told the user what they have,
 413          * let them know if that machine type isn't configured.
 414          */
 415         switch (cpu_class) {
 416         case CPUCLASS_X86:
 417 #ifndef HAMMER_CPU
 418         case CPUCLASS_K8:
 419 #endif
 420                 panic("CPU class not configured");
 421         default:
 422                 break;
 423         }
 424 }
 425
 426
 427 #if JG
 428 /* Update TSC freq with the value indicated by the caller. */
 429 static void
 430 tsc_freq_changed(void *arg, const struct cf_level *level, int status)
 431 {
 432         /* If there was an error during the transition, don't do anything. */
 433         if (status != 0)
 434                 return;
 435
 436         /* Total setting for this level gives the new frequency in MHz. */
 437         hw_clockrate = level->total_set.freq;
 438 }
 439
 440 EVENTHANDLER_DEFINE(cpufreq_post_change, tsc_freq_changed, NULL,
 441     EVENTHANDLER_PRI_ANY);
 442 #endif
 443
 444 /*
 445  * Final stage of CPU identification.
 446  */
 447 void
 448 identify_cpu(void)
 449 {
 450         u_int regs[4];
 451
 452         do_cpuid(0, regs);
 453         cpu_high = regs[0];
 454         ((u_int *)&cpu_vendor)[0] = regs[1];
 455         ((u_int *)&cpu_vendor)[1] = regs[3];
 456         ((u_int *)&cpu_vendor)[2] = regs[2];
 457         cpu_vendor[12] = '\0';
 458         cpu_vendor_id = find_cpu_vendor_id();
 459
 460         do_cpuid(1, regs);
 461         cpu_id = regs[0];
 462         cpu_procinfo = regs[1];
 463         cpu_feature = regs[3];
 464         cpu_feature2 = regs[2];
 465
 466         if (cpu_vendor_id == CPU_VENDOR_INTEL ||
 467             cpu_vendor_id == CPU_VENDOR_AMD ||
 468             cpu_vendor_id == CPU_VENDOR_CENTAUR) {
 469                 do_cpuid(0x80000000, regs);
 470                 cpu_exthigh = regs[0];
 471         }
 472         if (cpu_exthigh >= 0x80000001) {
 473                 do_cpuid(0x80000001, regs);
 474                 amd_feature = regs[3] & ~(cpu_feature & 0x0183f3ff);
 475                 amd_feature2 = regs[2];
 476         }
 477         if (cpu_exthigh >= 0x80000008) {
 478                 do_cpuid(0x80000008, regs);
 479                 cpu_procinfo2 = regs[2];
 480         }
 481
 482         /* XXX */
 483         cpu = CPU_CLAWHAMMER;
 484 }
 485
 486 static u_int
 487 find_cpu_vendor_id(void)
 488 {
 489         int     i;
 490
 491         for (i = 0; i < sizeof(cpu_vendors) / sizeof(cpu_vendors[0]); i++)
 492                 if (strcmp(cpu_vendor, cpu_vendors[i].vendor) == 0)
 493                         return (cpu_vendors[i].vendor_id);
 494         return (0);
 495 }
 496
 497 static void
 498 print_AMD_assoc(int i)
 499 {
 500         if (i == 255)
 501                 kprintf(", fully associative\n");
 502         else
 503                 kprintf(", %d-way associative\n", i);
 504 }
 505
 506 static void
 507 print_AMD_l2_assoc(int i)
 508 {
 509         switch (i & 0x0f) {
 510         case 0: kprintf(", disabled/not present\n"); break;
 511         case 1: kprintf(", direct mapped\n"); break;
 512         case 2: kprintf(", 2-way associative\n"); break;
 513         case 4: kprintf(", 4-way associative\n"); break;
 514         case 6: kprintf(", 8-way associative\n"); break;
 515         case 8: kprintf(", 16-way associative\n"); break;
 516         case 15: kprintf(", fully associative\n"); break;
 517         default: kprintf(", reserved configuration\n"); break;
 518         }
 519 }
 520
 521 static void
 522 print_AMD_info(void)
 523 {
 524         u_int regs[4];
 525
 526         if (cpu_exthigh < 0x80000005)
 527                 return;
 528
 529         do_cpuid(0x80000005, regs);
 530         kprintf("L1 2MB data TLB: %d entries", (regs[0] >> 16) & 0xff);
 531         print_AMD_assoc(regs[0] >> 24);
 532
 533         kprintf("L1 2MB instruction TLB: %d entries", regs[0] & 0xff);
 534         print_AMD_assoc((regs[0] >> 8) & 0xff);
 535
 536         kprintf("L1 4KB data TLB: %d entries", (regs[1] >> 16) & 0xff);
 537         print_AMD_assoc(regs[1] >> 24);
 538
 539         kprintf("L1 4KB instruction TLB: %d entries", regs[1] & 0xff);
 540         print_AMD_assoc((regs[1] >> 8) & 0xff);
 541
 542         kprintf("L1 data cache: %d kbytes", regs[2] >> 24);
 543         kprintf(", %d bytes/line", regs[2] & 0xff);
 544         kprintf(", %d lines/tag", (regs[2] >> 8) & 0xff);
 545         print_AMD_assoc((regs[2] >> 16) & 0xff);
 546
 547         kprintf("L1 instruction cache: %d kbytes", regs[3] >> 24);
 548         kprintf(", %d bytes/line", regs[3] & 0xff);
 549         kprintf(", %d lines/tag", (regs[3] >> 8) & 0xff);
 550         print_AMD_assoc((regs[3] >> 16) & 0xff);
 551
 552         if (cpu_exthigh >= 0x80000006) {
 553                 do_cpuid(0x80000006, regs);
 554                 if ((regs[0] >> 16) != 0) {
 555                         kprintf("L2 2MB data TLB: %d entries",
 556                             (regs[0] >> 16) & 0xfff);
 557                         print_AMD_l2_assoc(regs[0] >> 28);
 558                         kprintf("L2 2MB instruction TLB: %d entries",
 559                             regs[0] & 0xfff);
 560                         print_AMD_l2_assoc((regs[0] >> 28) & 0xf);
 561                 } else {
 562                         kprintf("L2 2MB unified TLB: %d entries",
 563                             regs[0] & 0xfff);
 564                         print_AMD_l2_assoc((regs[0] >> 28) & 0xf);
 565                 }
 566                 if ((regs[1] >> 16) != 0) {
 567                         kprintf("L2 4KB data TLB: %d entries",
 568                             (regs[1] >> 16) & 0xfff);
 569                         print_AMD_l2_assoc(regs[1] >> 28);
 570
 571                         kprintf("L2 4KB instruction TLB: %d entries",
 572                             (regs[1] >> 16) & 0xfff);
 573                         print_AMD_l2_assoc((regs[1] >> 28) & 0xf);
 574                 } else {
 575                         kprintf("L2 4KB unified TLB: %d entries",
 576                             (regs[1] >> 16) & 0xfff);
 577                         print_AMD_l2_assoc((regs[1] >> 28) & 0xf);
 578                 }
 579                 kprintf("L2 unified cache: %d kbytes", regs[2] >> 16);
 580                 kprintf(", %d bytes/line", regs[2] & 0xff);
 581                 kprintf(", %d lines/tag", (regs[2] >> 8) & 0x0f);
 582                 print_AMD_l2_assoc((regs[2] >> 12) & 0x0f);
 583         }
 584 }
 585
 586 static void
 587 print_via_padlock_info(void)
 588 {
 589         u_int regs[4];
 590
 591         /* Check for supported models. */
 592         switch (cpu_id & 0xff0) {
 593         case 0x690:
 594                 if ((cpu_id & 0xf) < 3)
 595                         return;
 596         case 0x6a0:
 597         case 0x6d0:
 598         case 0x6f0:
 599                 break;
 600         default:
 601                 return;
 602         }
 603
 604         do_cpuid(0xc0000000, regs);
 605         if (regs[0] >= 0xc0000001)
 606                 do_cpuid(0xc0000001, regs);
 607         else
 608                 return;
 609
 610         kprintf("\n  VIA Padlock Features=0x%b", regs[3],
 611         "\020"
 612         "\003RNG"               /* RNG */
 613         "\007AES"               /* ACE */
 614         "\011AES-CTR"           /* ACE2 */
 615         "\013SHA1,SHA256"       /* PHE */
 616         "\015RSA"               /* PMM */
 617         );
 618 }