1 /* $NetBSD: identcpu.c,v 1.8 2008/05/30 18:49:03 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2000, 2001, 2006, 2007, 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden, and by Jason R. Thorpe. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /*- 33 * Copyright (c)2008 YAMAMOTO Takashi, 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 48 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 55 * SUCH DAMAGE. 56 */ 57 58 #include <sys/cdefs.h> 59 __KERNEL_RCSID(0, "$NetBSD: identcpu.c,v 1.8 2008/05/30 18:49:03 christos Exp $"); 60 61 #include "opt_enhanced_speedstep.h" 62 #include "opt_intel_odcm.h" 63 #include "opt_intel_coretemp.h" 64 #include "opt_powernow_k8.h" 65 #include "opt_xen.h" 66 #ifdef i386 /* XXX */ 67 #include "opt_powernow_k7.h" 68 #endif 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/malloc.h> 73 #include <sys/bitops.h> 74 75 #include <uvm/uvm_extern.h> 76 77 #include <machine/specialreg.h> 78 #include <machine/pio.h> 79 #include <machine/cpu.h> 80 81 #include <x86/cputypes.h> 82 #include <x86/cacheinfo.h> 83 #include <x86/cpuvar.h> 84 #include <x86/cpu_msr.h> 85 #include <x86/powernow.h> 86 87 static const struct x86_cache_info intel_cpuid_cache_info[] = INTEL_CACHE_INFO; 88 89 static const struct x86_cache_info amd_cpuid_l2cache_assoc_info[] = 90 AMD_L2CACHE_INFO; 91 92 static const struct x86_cache_info amd_cpuid_l3cache_assoc_info[] = 93 AMD_L3CACHE_INFO; 94 95 int cpu_vendor; 96 char cpu_brand_string[49]; 97 98 /* 99 * Info for CTL_HW 100 */ 101 char cpu_model[120]; 102 103 /* 104 * Note: these are just the ones that may not have a cpuid instruction. 105 * We deal with the rest in a different way. 106 */ 107 const int i386_nocpuid_cpus[] = { 108 CPUVENDOR_INTEL, CPUCLASS_386, /* CPU_386SX */ 109 CPUVENDOR_INTEL, CPUCLASS_386, /* CPU_386 */ 110 CPUVENDOR_INTEL, CPUCLASS_486, /* CPU_486SX */ 111 CPUVENDOR_INTEL, CPUCLASS_486, /* CPU_486 */ 112 CPUVENDOR_CYRIX, CPUCLASS_486, /* CPU_486DLC */ 113 CPUVENDOR_CYRIX, CPUCLASS_486, /* CPU_6x86 */ 114 CPUVENDOR_NEXGEN, CPUCLASS_386, /* CPU_NX586 */ 115 }; 116 117 static const char cpu_vendor_names[][10] = { 118 "Unknown", "Intel", "NS/Cyrix", "NexGen", "AMD", "IDT/VIA", "Transmeta" 119 }; 120 121 static const struct x86_cache_info * 122 cache_info_lookup(const struct x86_cache_info *cai, uint8_t desc) 123 { 124 int i; 125 126 for (i = 0; cai[i].cai_desc != 0; i++) { 127 if (cai[i].cai_desc == desc) 128 return (&cai[i]); 129 } 130 131 return (NULL); 132 } 133 134 static void 135 cpu_probe_p6(struct cpu_info *ci) 136 { 137 u_int lp_max = 1; /* logical processors per package */ 138 u_int smt_max; /* smt per core */ 139 u_int core_max = 1; /* core per package */ 140 int smt_bits, core_bits; 141 uint32_t descs[4]; 142 143 if (cpu_vendor != CPUVENDOR_INTEL || 144 CPUID2FAMILY(ci->ci_signature) < 6) 145 return; 146 147 /* Determine extended feature flags. */ 148 x86_cpuid(0x80000000, descs); 149 if (descs[0] >= 0x80000001) { 150 x86_cpuid(0x80000001, descs); 151 ci->ci_feature3_flags |= descs[3]; 152 } 153 154 /* Determine topology. 253668.pdf 7.10.2. */ 155 ci->ci_packageid = ci->ci_initapicid; 156 ci->ci_coreid = 0; 157 ci->ci_smtid = 0; 158 if ((ci->ci_feature_flags & CPUID_HTT) != 0) { 159 x86_cpuid(1, descs); 160 lp_max = (descs[1] >> 16) & 0xff; 161 } 162 x86_cpuid(0, descs); 163 if (descs[0] >= 4) { 164 x86_cpuid2(4, 0, descs); 165 core_max = (descs[0] >> 26) + 1; 166 } 167 KASSERT(lp_max >= core_max); 168 smt_max = lp_max / core_max; 169 smt_bits = ilog2(smt_max - 1) + 1; 170 core_bits = ilog2(core_max - 1) + 1; 171 if (smt_bits + core_bits) { 172 ci->ci_packageid = ci->ci_initapicid >> (smt_bits + core_bits); 173 } 174 if (core_bits) { 175 u_int core_mask = __BITS(smt_bits, smt_bits + core_bits - 1); 176 ci->ci_coreid = __SHIFTOUT(ci->ci_initapicid, core_mask); 177 } 178 if (smt_bits) { 179 u_int smt_mask = __BITS(0, smt_bits - 1); 180 ci->ci_smtid = __SHIFTOUT(ci->ci_initapicid, smt_mask); 181 } 182 } 183 184 static void 185 cpu_probe_amd_cache(struct cpu_info *ci) 186 { 187 const struct x86_cache_info *cp; 188 struct x86_cache_info *cai; 189 int family, model; 190 u_int descs[4]; 191 u_int lfunc; 192 193 family = CPUID2FAMILY(ci->ci_signature); 194 model = CPUID2MODEL(ci->ci_signature); 195 196 /* 197 * K5 model 0 has none of this info. 198 */ 199 if (family == 5 && model == 0) 200 return; 201 202 /* 203 * Get extended values for K8 and up. 204 */ 205 if (family == 0xf) { 206 family += CPUID2EXTFAMILY(ci->ci_signature); 207 model += CPUID2EXTMODEL(ci->ci_signature); 208 } 209 210 /* 211 * Determine the largest extended function value. 212 */ 213 x86_cpuid(0x80000000, descs); 214 lfunc = descs[0]; 215 216 /* 217 * Determine L1 cache/TLB info. 218 */ 219 if (lfunc < 0x80000005) { 220 /* No L1 cache info available. */ 221 return; 222 } 223 224 x86_cpuid(0x80000005, descs); 225 226 /* 227 * K6-III and higher have large page TLBs. 228 */ 229 if ((family == 5 && model >= 9) || family >= 6) { 230 cai = &ci->ci_cinfo[CAI_ITLB2]; 231 cai->cai_totalsize = AMD_L1_EAX_ITLB_ENTRIES(descs[0]); 232 cai->cai_associativity = AMD_L1_EAX_ITLB_ASSOC(descs[0]); 233 cai->cai_linesize = (4 * 1024 * 1024); 234 235 cai = &ci->ci_cinfo[CAI_DTLB2]; 236 cai->cai_totalsize = AMD_L1_EAX_DTLB_ENTRIES(descs[0]); 237 cai->cai_associativity = AMD_L1_EAX_DTLB_ASSOC(descs[0]); 238 cai->cai_linesize = (4 * 1024 * 1024); 239 } 240 241 cai = &ci->ci_cinfo[CAI_ITLB]; 242 cai->cai_totalsize = AMD_L1_EBX_ITLB_ENTRIES(descs[1]); 243 cai->cai_associativity = AMD_L1_EBX_ITLB_ASSOC(descs[1]); 244 cai->cai_linesize = (4 * 1024); 245 246 cai = &ci->ci_cinfo[CAI_DTLB]; 247 cai->cai_totalsize = AMD_L1_EBX_DTLB_ENTRIES(descs[1]); 248 cai->cai_associativity = AMD_L1_EBX_DTLB_ASSOC(descs[1]); 249 cai->cai_linesize = (4 * 1024); 250 251 cai = &ci->ci_cinfo[CAI_DCACHE]; 252 cai->cai_totalsize = AMD_L1_ECX_DC_SIZE(descs[2]); 253 cai->cai_associativity = AMD_L1_ECX_DC_ASSOC(descs[2]); 254 cai->cai_linesize = AMD_L1_EDX_IC_LS(descs[2]); 255 256 cai = &ci->ci_cinfo[CAI_ICACHE]; 257 cai->cai_totalsize = AMD_L1_EDX_IC_SIZE(descs[3]); 258 cai->cai_associativity = AMD_L1_EDX_IC_ASSOC(descs[3]); 259 cai->cai_linesize = AMD_L1_EDX_IC_LS(descs[3]); 260 261 /* 262 * Determine L2 cache/TLB info. 263 */ 264 if (lfunc < 0x80000006) { 265 /* No L2 cache info available. */ 266 return; 267 } 268 269 x86_cpuid(0x80000006, descs); 270 271 cai = &ci->ci_cinfo[CAI_L2CACHE]; 272 cai->cai_totalsize = AMD_L2_ECX_C_SIZE(descs[2]); 273 cai->cai_associativity = AMD_L2_ECX_C_ASSOC(descs[2]); 274 cai->cai_linesize = AMD_L2_ECX_C_LS(descs[2]); 275 276 cp = cache_info_lookup(amd_cpuid_l2cache_assoc_info, 277 cai->cai_associativity); 278 if (cp != NULL) 279 cai->cai_associativity = cp->cai_associativity; 280 else 281 cai->cai_associativity = 0; /* XXX Unknown/reserved */ 282 283 if (family < 0xf) { 284 /* No L3 cache info available. */ 285 return; 286 } 287 288 cai = &ci->ci_cinfo[CAI_L3CACHE]; 289 cai->cai_totalsize = AMD_L3_EDX_C_SIZE(descs[3]); 290 cai->cai_associativity = AMD_L3_EDX_C_ASSOC(descs[3]); 291 cai->cai_linesize = AMD_L3_EDX_C_LS(descs[3]); 292 293 cp = cache_info_lookup(amd_cpuid_l3cache_assoc_info, 294 cai->cai_associativity); 295 if (cp != NULL) 296 cai->cai_associativity = cp->cai_associativity; 297 else 298 cai->cai_associativity = 0; /* XXX Unknown reserved */ 299 300 if (lfunc < 0x80000019) { 301 /* No 1GB Page TLB */ 302 return; 303 } 304 305 x86_cpuid(0x80000019, descs); 306 307 cai = &ci->ci_cinfo[CAI_L1_1GBDTLB]; 308 cai->cai_totalsize = AMD_L1_1GB_EAX_DTLB_ENTRIES(descs[1]); 309 cai->cai_associativity = AMD_L1_1GB_EAX_DTLB_ASSOC(descs[1]); 310 cai->cai_linesize = (1 * 1024); 311 312 cai = &ci->ci_cinfo[CAI_L1_1GBITLB]; 313 cai->cai_totalsize = AMD_L1_1GB_EAX_IUTLB_ENTRIES(descs[0]); 314 cai->cai_associativity = AMD_L1_1GB_EAX_IUTLB_ASSOC(descs[0]); 315 cai->cai_linesize = (1 * 1024); 316 317 cai = &ci->ci_cinfo[CAI_L2_1GBDTLB]; 318 cai->cai_totalsize = AMD_L2_1GB_EBX_DUTLB_ENTRIES(descs[1]); 319 cai->cai_associativity = AMD_L2_1GB_EBX_DUTLB_ASSOC(descs[1]); 320 cai->cai_linesize = (1 * 1024); 321 322 cai = &ci->ci_cinfo[CAI_L2_1GBITLB]; 323 cai->cai_totalsize = AMD_L2_1GB_EBX_IUTLB_ENTRIES(descs[0]); 324 cai->cai_associativity = AMD_L2_1GB_EBX_IUTLB_ASSOC(descs[0]); 325 cai->cai_linesize = (1 * 1024); 326 } 327 328 static void 329 cpu_probe_k5(struct cpu_info *ci) 330 { 331 int flag; 332 333 if (cpu_vendor != CPUVENDOR_AMD || 334 CPUID2FAMILY(ci->ci_signature) != 5) 335 return; 336 337 if (CPUID2MODEL(ci->ci_signature) == 0) { 338 /* 339 * According to the AMD Processor Recognition App Note, 340 * the AMD-K5 Model 0 uses the wrong bit to indicate 341 * support for global PTEs, instead using bit 9 (APIC) 342 * rather than bit 13 (i.e. "0x200" vs. 0x2000". Oops!). 343 */ 344 flag = ci->ci_feature_flags; 345 if ((flag & CPUID_APIC) != 0) 346 flag = (flag & ~CPUID_APIC) | CPUID_PGE; 347 ci->ci_feature_flags = flag; 348 } 349 350 cpu_probe_amd_cache(ci); 351 } 352 353 static void 354 cpu_probe_k678(struct cpu_info *ci) 355 { 356 uint32_t descs[4]; 357 358 if (cpu_vendor != CPUVENDOR_AMD || 359 CPUID2FAMILY(ci->ci_signature) < 6) 360 return; 361 362 /* Determine the extended feature flags. */ 363 x86_cpuid(0x80000000, descs); 364 if (descs[0] >= 0x80000001) { 365 x86_cpuid(0x80000001, descs); 366 ci->ci_feature_flags |= descs[3]; 367 } 368 369 cpu_probe_amd_cache(ci); 370 } 371 372 static inline uint8_t 373 cyrix_read_reg(uint8_t reg) 374 { 375 376 outb(0x22, reg); 377 return inb(0x23); 378 } 379 380 static inline void 381 cyrix_write_reg(uint8_t reg, uint8_t data) 382 { 383 384 outb(0x22, reg); 385 outb(0x23, data); 386 } 387 388 static void 389 cpu_probe_cyrix_cmn(struct cpu_info *ci) 390 { 391 /* 392 * i8254 latch check routine: 393 * National Geode (formerly Cyrix MediaGX) has a serious bug in 394 * its built-in i8254-compatible clock module (cs5510 cs5520). 395 * Set the variable 'clock_broken_latch' to indicate it. 396 * 397 * This bug is not present in the cs5530, and the flag 398 * is disabled again in sys/arch/i386/pci/pcib.c if this later 399 * model device is detected. Ideally, this work-around should not 400 * even be in here, it should be in there. XXX 401 */ 402 uint8_t c3; 403 #ifndef XEN 404 extern int clock_broken_latch; 405 406 switch (ci->ci_signature) { 407 case 0x440: /* Cyrix MediaGX */ 408 case 0x540: /* GXm */ 409 clock_broken_latch = 1; 410 break; 411 } 412 #endif 413 414 /* set up various cyrix registers */ 415 /* 416 * Enable suspend on halt (powersave mode). 417 * When powersave mode is enabled, the TSC stops counting 418 * while the CPU is halted in idle() waiting for an interrupt. 419 * This means we can't use the TSC for interval time in 420 * microtime(9), and thus it is disabled here. 421 * 422 * It still makes a perfectly good cycle counter 423 * for program profiling, so long as you remember you're 424 * counting cycles, and not time. Further, if you don't 425 * mind not using powersave mode, the TSC works just fine, 426 * so this should really be optional. XXX 427 */ 428 cyrix_write_reg(0xc2, cyrix_read_reg(0xc2) | 0x08); 429 430 /* 431 * Do not disable the TSC on the Geode GX, it's reported to 432 * work fine. 433 */ 434 if (ci->ci_signature != 0x552) 435 ci->ci_feature_flags &= ~CPUID_TSC; 436 437 /* enable access to ccr4/ccr5 */ 438 c3 = cyrix_read_reg(0xC3); 439 cyrix_write_reg(0xC3, c3 | 0x10); 440 /* cyrix's workaround for the "coma bug" */ 441 cyrix_write_reg(0x31, cyrix_read_reg(0x31) | 0xf8); 442 cyrix_write_reg(0x32, cyrix_read_reg(0x32) | 0x7f); 443 cyrix_write_reg(0x33, cyrix_read_reg(0x33) & ~0xff); 444 cyrix_write_reg(0x3c, cyrix_read_reg(0x3c) | 0x87); 445 /* disable access to ccr4/ccr5 */ 446 cyrix_write_reg(0xC3, c3); 447 448 /* 449 * XXX disable page zero in the idle loop, it seems to 450 * cause panics on these CPUs. 451 */ 452 vm_page_zero_enable = FALSE; 453 } 454 455 static void 456 cpu_probe_cyrix(struct cpu_info *ci) 457 { 458 459 if (cpu_vendor != CPUVENDOR_CYRIX || 460 CPUID2FAMILY(ci->ci_signature) < 4 || 461 CPUID2FAMILY(ci->ci_signature) > 6) 462 return; 463 464 cpu_probe_cyrix_cmn(ci); 465 } 466 467 static void 468 cpu_probe_winchip(struct cpu_info *ci) 469 { 470 471 if (cpu_vendor != CPUVENDOR_IDT || 472 CPUID2FAMILY(ci->ci_signature) != 5) 473 return; 474 475 if (CPUID2MODEL(ci->ci_signature) == 4) { 476 /* WinChip C6 */ 477 ci->ci_feature_flags &= ~CPUID_TSC; 478 } 479 } 480 481 static void 482 cpu_probe_c3(struct cpu_info *ci) 483 { 484 u_int family, model, stepping, descs[4], lfunc, msr; 485 struct x86_cache_info *cai; 486 487 if (cpu_vendor != CPUVENDOR_IDT || 488 CPUID2FAMILY(ci->ci_signature) != 5) 489 return; 490 491 family = CPUID2FAMILY(ci->ci_signature); 492 model = CPUID2MODEL(ci->ci_signature); 493 stepping = CPUID2STEPPING(ci->ci_signature); 494 495 /* Determine the largest extended function value. */ 496 x86_cpuid(0x80000000, descs); 497 lfunc = descs[0]; 498 499 /* Determine the extended feature flags. */ 500 if (lfunc >= 0x80000001) { 501 x86_cpuid(0x80000001, descs); 502 ci->ci_feature_flags |= descs[3]; 503 } 504 505 if (model >= 0x9) { 506 /* Nehemiah or Esther */ 507 x86_cpuid(0xc0000000, descs); 508 lfunc = descs[0]; 509 if (lfunc >= 0xc0000001) { /* has ACE, RNG */ 510 x86_cpuid(0xc0000001, descs); 511 lfunc = descs[3]; 512 if (model > 0x9 || stepping >= 8) { /* ACE */ 513 if (lfunc & CPUID_VIA_HAS_ACE) { 514 ci->ci_padlock_flags = lfunc; 515 if ((lfunc & CPUID_VIA_DO_ACE) == 0) { 516 msr = rdmsr(MSR_VIA_ACE); 517 wrmsr(MSR_VIA_ACE, msr | 518 MSR_VIA_ACE_ENABLE); 519 ci->ci_padlock_flags |= 520 CPUID_VIA_DO_ACE; 521 } 522 } 523 } 524 } 525 } 526 527 /* 528 * Determine L1 cache/TLB info. 529 */ 530 if (lfunc < 0x80000005) { 531 /* No L1 cache info available. */ 532 return; 533 } 534 535 x86_cpuid(0x80000005, descs); 536 537 cai = &ci->ci_cinfo[CAI_ITLB]; 538 cai->cai_totalsize = VIA_L1_EBX_ITLB_ENTRIES(descs[1]); 539 cai->cai_associativity = VIA_L1_EBX_ITLB_ASSOC(descs[1]); 540 cai->cai_linesize = (4 * 1024); 541 542 cai = &ci->ci_cinfo[CAI_DTLB]; 543 cai->cai_totalsize = VIA_L1_EBX_DTLB_ENTRIES(descs[1]); 544 cai->cai_associativity = VIA_L1_EBX_DTLB_ASSOC(descs[1]); 545 cai->cai_linesize = (4 * 1024); 546 547 cai = &ci->ci_cinfo[CAI_DCACHE]; 548 cai->cai_totalsize = VIA_L1_ECX_DC_SIZE(descs[2]); 549 cai->cai_associativity = VIA_L1_ECX_DC_ASSOC(descs[2]); 550 cai->cai_linesize = VIA_L1_EDX_IC_LS(descs[2]); 551 if (model == 9 && stepping == 8) { 552 /* Erratum: stepping 8 reports 4 when it should be 2 */ 553 cai->cai_associativity = 2; 554 } 555 556 cai = &ci->ci_cinfo[CAI_ICACHE]; 557 cai->cai_totalsize = VIA_L1_EDX_IC_SIZE(descs[3]); 558 cai->cai_associativity = VIA_L1_EDX_IC_ASSOC(descs[3]); 559 cai->cai_linesize = VIA_L1_EDX_IC_LS(descs[3]); 560 if (model == 9 && stepping == 8) { 561 /* Erratum: stepping 8 reports 4 when it should be 2 */ 562 cai->cai_associativity = 2; 563 } 564 565 /* 566 * Determine L2 cache/TLB info. 567 */ 568 if (lfunc < 0x80000006) { 569 /* No L2 cache info available. */ 570 return; 571 } 572 573 x86_cpuid(0x80000006, descs); 574 575 cai = &ci->ci_cinfo[CAI_L2CACHE]; 576 if (model >= 9) { 577 cai->cai_totalsize = VIA_L2N_ECX_C_SIZE(descs[2]); 578 cai->cai_associativity = VIA_L2N_ECX_C_ASSOC(descs[2]); 579 cai->cai_linesize = VIA_L2N_ECX_C_LS(descs[2]); 580 } else { 581 cai->cai_totalsize = VIA_L2_ECX_C_SIZE(descs[2]); 582 cai->cai_associativity = VIA_L2_ECX_C_ASSOC(descs[2]); 583 cai->cai_linesize = VIA_L2_ECX_C_LS(descs[2]); 584 } 585 } 586 587 static void 588 cpu_probe_geode(struct cpu_info *ci) 589 { 590 591 if (memcmp("Geode by NSC", ci->ci_vendor, 12) != 0 || 592 CPUID2FAMILY(ci->ci_signature) != 5) 593 return; 594 595 cpu_probe_cyrix_cmn(ci); 596 cpu_probe_amd_cache(ci); 597 } 598 599 void 600 cpu_probe(struct cpu_info *ci) 601 { 602 const struct x86_cache_info *cai; 603 u_int descs[4]; 604 int iterations, i, j; 605 uint8_t desc; 606 uint32_t miscbytes; 607 uint32_t brand[12]; 608 609 cpu_vendor = i386_nocpuid_cpus[cpu << 1]; 610 cpu_class = i386_nocpuid_cpus[(cpu << 1) + 1]; 611 612 if (cpuid_level < 0) 613 return; 614 615 x86_cpuid(0, descs); 616 cpuid_level = descs[0]; 617 ci->ci_vendor[0] = descs[1]; 618 ci->ci_vendor[2] = descs[2]; 619 ci->ci_vendor[1] = descs[3]; 620 ci->ci_vendor[3] = 0; 621 622 if (memcmp(ci->ci_vendor, "GenuineIntel", 12) == 0) 623 cpu_vendor = CPUVENDOR_INTEL; 624 else if (memcmp(ci->ci_vendor, "AuthenticAMD", 12) == 0) 625 cpu_vendor = CPUVENDOR_AMD; 626 else if (memcmp(ci->ci_vendor, "CyrixInstead", 12) == 0) 627 cpu_vendor = CPUVENDOR_CYRIX; 628 else if (memcmp(ci->ci_vendor, "Geode by NSC", 12) == 0) 629 cpu_vendor = CPUVENDOR_CYRIX; 630 else if (memcmp(ci->ci_vendor, "CentaurHauls", 12) == 0) 631 cpu_vendor = CPUVENDOR_IDT; 632 else if (memcmp(ci->ci_vendor, "GenuineTMx86", 12) == 0) 633 cpu_vendor = CPUVENDOR_TRANSMETA; 634 else 635 cpu_vendor = CPUVENDOR_UNKNOWN; 636 637 x86_cpuid(0x80000000, brand); 638 if (brand[0] >= 0x80000004) { 639 x86_cpuid(0x80000002, brand); 640 x86_cpuid(0x80000003, brand + 4); 641 x86_cpuid(0x80000004, brand + 8); 642 for (i = 0; i < 48; i++) { 643 if (((char *) brand)[i] != ' ') 644 break; 645 } 646 memcpy(cpu_brand_string, ((char *) brand) + i, 48 - i); 647 } 648 649 if (cpuid_level >= 1) { 650 x86_cpuid(1, descs); 651 ci->ci_signature = descs[0]; 652 miscbytes = descs[1]; 653 ci->ci_feature2_flags = descs[2]; 654 ci->ci_feature_flags = descs[3]; 655 656 /* Determine family + class. */ 657 cpu_class = CPUID2FAMILY(ci->ci_signature) + (CPUCLASS_386 - 3); 658 if (cpu_class > CPUCLASS_686) 659 cpu_class = CPUCLASS_686; 660 661 /* CLFLUSH line size is next 8 bits */ 662 if (ci->ci_feature_flags & CPUID_CFLUSH) 663 ci->ci_cflush_lsize = ((miscbytes >> 8) & 0xff) << 3; 664 ci->ci_initapicid = (miscbytes >> 24) & 0xff; 665 } 666 667 if (cpuid_level >= 2) { 668 /* Parse the cache info from `cpuid', if we have it. */ 669 x86_cpuid(2, descs); 670 iterations = descs[0] & 0xff; 671 while (iterations-- > 0) { 672 for (i = 0; i < 4; i++) { 673 if (descs[i] & 0x80000000) 674 continue; 675 for (j = 0; j < 4; j++) { 676 if (i == 0 && j == 0) 677 continue; 678 desc = (descs[i] >> (j * 8)) & 0xff; 679 if (desc == 0) 680 continue; 681 cai = cache_info_lookup( 682 intel_cpuid_cache_info, desc); 683 if (cai != NULL) { 684 ci->ci_cinfo[cai->cai_index] = 685 *cai; 686 } 687 } 688 } 689 } 690 } 691 692 cpu_probe_p6(ci); 693 cpu_probe_k5(ci); 694 cpu_probe_k678(ci); 695 cpu_probe_cyrix(ci); 696 cpu_probe_winchip(ci); 697 cpu_probe_c3(ci); 698 cpu_probe_geode(ci); 699 700 if (cpu_vendor != CPUVENDOR_AMD && (ci->ci_feature_flags & CPUID_TM) && 701 (rdmsr(MSR_MISC_ENABLE) & (1 << 3)) == 0) { 702 /* Enable thermal monitor 1. */ 703 wrmsr(MSR_MISC_ENABLE, rdmsr(MSR_MISC_ENABLE) | (1<<3)); 704 } 705 706 if ((cpu_feature | cpu_feature2) == 0) { 707 /* If first. */ 708 cpu_feature = ci->ci_feature_flags; 709 cpu_feature2 = ci->ci_feature2_flags; 710 } else { 711 /* If not first. */ 712 cpu_feature &= ci->ci_feature_flags; 713 cpu_feature2 &= ci->ci_feature2_flags; 714 } 715 } 716 717 void 718 cpu_identify(struct cpu_info *ci) 719 { 720 721 snprintf(cpu_model, sizeof(cpu_model), "%s %d86-class", 722 cpu_vendor_names[cpu_vendor], cpu_class + 3); 723 aprint_normal(": %s", cpu_model); 724 if (ci->ci_data.cpu_cc_freq != 0) 725 aprint_normal(", %dMHz", (int)(ci->ci_data.cpu_cc_freq / 1000000)); 726 if (ci->ci_signature != 0) 727 aprint_normal(", id 0x%x", ci->ci_signature); 728 aprint_normal("\n"); 729 730 if (cpu_brand_string[0] == '\0') { 731 strlcpy(cpu_brand_string, cpu_model, sizeof(cpu_brand_string)); 732 } 733 if (cpu_class == CPUCLASS_386) { 734 panic("NetBSD requires an 80486DX or later processor"); 735 } 736 if (cpu == CPU_486DLC) { 737 aprint_error("WARNING: BUGGY CYRIX CACHE\n"); 738 } 739 740 #ifdef i386 /* XXX for now */ 741 if (cpu_vendor == CPUVENDOR_TRANSMETA) { 742 u_int descs[4]; 743 x86_cpuid(0x80860000, descs); 744 if (descs[0] >= 0x80860007) 745 tmx86_init_longrun(); 746 } 747 748 /* If we have FXSAVE/FXRESTOR, use them. */ 749 if (cpu_feature & CPUID_FXSR) { 750 i386_use_fxsave = 1; 751 /* 752 * If we have SSE/SSE2, enable XMM exceptions, and 753 * notify userland. 754 */ 755 if (cpu_feature & CPUID_SSE) 756 i386_has_sse = 1; 757 if (cpu_feature & CPUID_SSE2) 758 i386_has_sse2 = 1; 759 } else 760 i386_use_fxsave = 0; 761 #endif /* i386 */ 762 763 #ifdef ENHANCED_SPEEDSTEP 764 if (cpu_feature2 & CPUID2_EST) { 765 if (rdmsr(MSR_MISC_ENABLE) & (1 << 16)) 766 est_init(cpu_vendor); 767 } 768 #endif /* ENHANCED_SPEEDSTEP */ 769 770 #ifdef INTEL_CORETEMP 771 if (cpu_vendor == CPUVENDOR_INTEL && cpuid_level >= 0x06) 772 coretemp_register(ci); 773 #endif 774 775 #if defined(POWERNOW_K7) || defined(POWERNOW_K8) 776 if (cpu_vendor == CPUVENDOR_AMD && powernow_probe(ci)) { 777 switch (CPUID2FAMILY(ci->ci_signature)) { 778 #ifdef POWERNOW_K7 779 case 6: 780 k7_powernow_init(); 781 break; 782 #endif 783 #ifdef POWERNOW_K8 784 case 15: 785 k8_powernow_init(); 786 break; 787 #endif 788 default: 789 break; 790 } 791 } 792 #endif /* POWERNOW_K7 || POWERNOW_K8 */ 793 794 #ifdef INTEL_ONDEMAND_CLOCKMOD 795 if (cpuid_level >= 1) { 796 clockmod_init(); 797 } 798 #endif 799 } 800