1 /* -*- mode: C; c-basic-offset: 3; -*- */ 2 3 /*--------------------------------------------------------------------*/ 4 /*--- Cache-related stuff. m_cache.c ---*/ 5 /*--------------------------------------------------------------------*/ 6 7 /* 8 This file is part of Valgrind, a dynamic binary instrumentation 9 framework. 10 11 Copyright (C) 2002-2015 Nicholas Nethercote 12 njn (at) valgrind.org 13 14 This program is free software; you can redistribute it and/or 15 modify it under the terms of the GNU General Public License as 16 published by the Free Software Foundation; either version 2 of the 17 License, or (at your option) any later version. 18 19 This program is distributed in the hope that it will be useful, but 20 WITHOUT ANY WARRANTY; without even the implied warranty of 21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 22 General Public License for more details. 23 24 You should have received a copy of the GNU General Public License 25 along with this program; if not, write to the Free Software 26 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 27 02111-1307, USA. 28 29 The GNU General Public License is contained in the file COPYING. 30 */ 31 32 #include "pub_core_basics.h" 33 #include "pub_core_libcbase.h" 34 #include "pub_core_libcassert.h" 35 #include "pub_core_libcprint.h" 36 #include "pub_core_mallocfree.h" 37 #include "pub_core_machine.h" 38 #include "pub_core_debuglog.h" 39 #include "libvex.h" 40 41 #if defined(VGA_x86) || defined(VGA_amd64) 42 43 #include "pub_core_cpuid.h" 44 45 // All CPUID info taken from sandpile.org/ia32/cpuid.htm */ 46 // Probably only works for Intel and AMD chips, and probably only for some of 47 // them. 48 49 static void 50 add_cache(VexCacheInfo *ci, VexCache cache) 51 { 52 static UInt num_allocated = 0; 53 54 if (ci->num_caches == num_allocated) { 55 num_allocated += 6; 56 ci->caches = VG_(realloc)("m_cache", ci->caches, 57 num_allocated * sizeof *ci->caches); 58 } 59 60 if (ci->num_levels < cache.level) ci->num_levels = cache.level; 61 ci->caches[ci->num_caches++] = cache; 62 } 63 64 /* Convenience macros */ 65 #define add_icache(level, size, assoc, linesize) \ 66 do { \ 67 add_cache(ci, \ 68 VEX_CACHE_INIT(INSN_CACHE, level, size, linesize, assoc)); \ 69 } while (0) 70 71 #define add_dcache(level, size, assoc, linesize) \ 72 do { \ 73 add_cache(ci, \ 74 VEX_CACHE_INIT(DATA_CACHE, level, size, linesize, assoc)); \ 75 } while (0) 76 77 #define add_ucache(level, size, assoc, linesize) \ 78 do { \ 79 add_cache(ci, \ 80 VEX_CACHE_INIT(UNIFIED_CACHE, level, size, linesize, assoc)); \ 81 } while (0) 82 83 #define add_itcache(level, size, assoc) \ 84 do { \ 85 VexCache c = \ 86 VEX_CACHE_INIT(INSN_CACHE, level, size, 0, assoc); \ 87 c.is_trace_cache = True; \ 88 add_cache(ci, c); \ 89 } while (0) 90 91 #define add_I1(size, assoc, linesize) add_icache(1, size, assoc, linesize) 92 #define add_D1(size, assoc, linesize) add_dcache(1, size, assoc, linesize) 93 #define add_U1(size, assoc, linesize) add_ucache(1, size, assoc, linesize) 94 #define add_I2(size, assoc, linesize) add_icache(2, size, assoc, linesize) 95 #define add_D2(size, assoc, linesize) add_dcache(2, size, assoc, linesize) 96 #define add_U2(size, assoc, linesize) add_ucache(2, size, assoc, linesize) 97 #define add_I3(size, assoc, linesize) add_icache(3, size, assoc, linesize) 98 #define add_D3(size, assoc, linesize) add_dcache(3, size, assoc, linesize) 99 #define add_U3(size, assoc, linesize) add_ucache(3, size, assoc, linesize) 100 101 #define add_I1T(size, assoc) \ 102 add_itcache(1, size, assoc) 103 104 /* Intel method is truly wretched. We have to do an insane indexing into an 105 * array of pre-defined configurations for various parts of the memory 106 * hierarchy. 107 * According to Intel Processor Identification, App Note 485. 108 * 109 * If a L3 cache is found, then data for it rather than the L2 110 * is returned via *LLc. 111 */ 112 static Int 113 Intel_cache_info(Int level, VexCacheInfo *ci) 114 { 115 UInt cpuid1_eax; 116 UInt cpuid1_ignore; 117 Int family; 118 Int model; 119 UChar info[16]; 120 Int i, j, trials; 121 122 if (level < 2) { 123 VG_(debugLog)(1, "cache", "warning: CPUID level < 2 for Intel " 124 "processor (%d)\n", level); 125 return -1; 126 } 127 128 /* family/model needed to distinguish code reuse (currently 0x49) */ 129 VG_(cpuid)(1, 0, &cpuid1_eax, &cpuid1_ignore, 130 &cpuid1_ignore, &cpuid1_ignore); 131 family = (((cpuid1_eax >> 20) & 0xff) << 4) + ((cpuid1_eax >> 8) & 0xf); 132 model = (((cpuid1_eax >> 16) & 0xf) << 4) + ((cpuid1_eax >> 4) & 0xf); 133 134 VG_(cpuid)(2, 0, (UInt*)&info[0], (UInt*)&info[4], 135 (UInt*)&info[8], (UInt*)&info[12]); 136 trials = info[0] - 1; /* AL register - bits 0..7 of %eax */ 137 info[0] = 0x0; /* reset AL */ 138 139 if (0 != trials) { 140 VG_(debugLog)(1, "cache", "warning: non-zero CPUID trials for Intel " 141 "processor (%d)\n", trials); 142 return -1; 143 } 144 145 ci->num_levels = 0; 146 ci->num_caches = 0; 147 ci->icaches_maintain_coherence = True; 148 ci->caches = NULL; 149 150 for (i = 0; i < 16; i++) { 151 152 switch (info[i]) { 153 154 case 0x0: /* ignore zeros */ 155 break; 156 157 /* TLB info, ignore */ 158 case 0x01: case 0x02: case 0x03: case 0x04: case 0x05: 159 case 0x0b: 160 case 0x4f: case 0x50: case 0x51: case 0x52: case 0x55: 161 case 0x56: case 0x57: case 0x59: 162 case 0x5a: case 0x5b: case 0x5c: case 0x5d: 163 case 0x76: 164 case 0xb0: case 0xb1: case 0xb2: 165 case 0xb3: case 0xb4: case 0xba: case 0xc0: 166 case 0xca: 167 break; 168 169 case 0x06: add_I1( 8, 4, 32); break; 170 case 0x08: add_I1(16, 4, 32); break; 171 case 0x09: add_I1(32, 4, 64); break; 172 case 0x30: add_I1(32, 8, 64); break; 173 174 case 0x0a: add_D1( 8, 2, 32); break; 175 case 0x0c: add_D1(16, 4, 32); break; 176 case 0x0d: add_D1(16, 4, 64); break; 177 case 0x0e: add_D1(24, 6, 64); break; 178 case 0x2c: add_D1(32, 8, 64); break; 179 180 /* IA-64 info -- panic! */ 181 case 0x10: case 0x15: case 0x1a: 182 case 0x88: case 0x89: case 0x8a: case 0x8d: 183 case 0x90: case 0x96: case 0x9b: 184 VG_(core_panic)("IA-64 cache detected?!"); 185 186 /* L3 cache info. */ 187 case 0x22: add_U3(512, 4, 64); break; 188 case 0x23: add_U3(1024, 8, 64); break; 189 case 0x25: add_U3(2048, 8, 64); break; 190 case 0x29: add_U3(4096, 8, 64); break; 191 case 0x46: add_U3(4096, 4, 64); break; 192 case 0x47: add_U3(8192, 8, 64); break; 193 case 0x4a: add_U3(6144, 12, 64); break; 194 case 0x4b: add_U3(8192, 16, 64); break; 195 case 0x4c: add_U3(12288, 12, 64); break; 196 case 0x4d: add_U3(16384, 16, 64); break; 197 case 0xd0: add_U3(512, 4, 64); break; 198 case 0xd1: add_U3(1024, 4, 64); break; 199 case 0xd2: add_U3(2048, 4, 64); break; 200 case 0xd6: add_U3(1024, 8, 64); break; 201 case 0xd7: add_U3(2048, 8, 64); break; 202 case 0xd8: add_U3(4096, 8, 64); break; 203 case 0xdc: add_U3(1536, 12, 64); break; 204 case 0xdd: add_U3(3072, 12, 64); break; 205 case 0xde: add_U3(6144, 12, 64); break; 206 case 0xe2: add_U3(2048, 16, 64); break; 207 case 0xe3: add_U3(4096, 16, 64); break; 208 case 0xe4: add_U3(8192, 16, 64); break; 209 case 0xea: add_U3(12288, 24, 64); break; 210 case 0xeb: add_U3(18432, 24, 64); break; 211 case 0xec: add_U3(24576, 24, 64); break; 212 213 /* Described as "MLC" in Intel documentation */ 214 case 0x21: add_U2(256, 8, 64); break; 215 216 /* These are sectored, whatever that means */ 217 // FIXME: I did not find these in the Intel docs 218 case 0x39: add_U2(128, 4, 64); break; 219 case 0x3c: add_U2(256, 4, 64); break; 220 221 /* If a P6 core, this means "no L2 cache". 222 If a P4 core, this means "no L3 cache". 223 We don't know what core it is, so don't issue a warning. To detect 224 a missing L2 cache, we use 'L2_found'. */ 225 case 0x40: 226 break; 227 228 case 0x41: add_U2( 128, 4, 32); break; 229 case 0x42: add_U2( 256, 4, 32); break; 230 case 0x43: add_U2( 512, 4, 32); break; 231 case 0x44: add_U2( 1024, 4, 32); break; 232 case 0x45: add_U2( 2048, 4, 32); break; 233 case 0x48: add_U2( 3072, 12, 64); break; 234 case 0x4e: add_U2( 6144, 24, 64); break; 235 case 0x49: 236 if (family == 15 && model == 6) { 237 /* On Xeon MP (family F, model 6), this is for L3 */ 238 add_U3(4096, 16, 64); 239 } else { 240 add_U2(4096, 16, 64); 241 } 242 break; 243 244 /* These are sectored, whatever that means */ 245 case 0x60: add_D1(16, 8, 64); break; /* sectored */ 246 case 0x66: add_D1( 8, 4, 64); break; /* sectored */ 247 case 0x67: add_D1(16, 4, 64); break; /* sectored */ 248 case 0x68: add_D1(32, 4, 64); break; /* sectored */ 249 250 /* HACK ALERT: Instruction trace cache -- capacity is micro-ops based. 251 * conversion to byte size is a total guess; treat the 12K and 16K 252 * cases the same since the cache byte size must be a power of two for 253 * everything to work!. Also guessing 32 bytes for the line size... 254 */ 255 case 0x70: /* 12K micro-ops, 8-way */ 256 add_I1T(12, 8); 257 break; 258 case 0x71: /* 16K micro-ops, 8-way */ 259 add_I1T(16, 8); 260 break; 261 case 0x72: /* 32K micro-ops, 8-way */ 262 add_I1T(32, 8); 263 break; 264 265 /* not sectored, whatever that might mean */ 266 case 0x78: add_U2(1024, 4, 64); break; 267 268 /* These are sectored, whatever that means */ 269 case 0x79: add_U2( 128, 8, 64); break; 270 case 0x7a: add_U2( 256, 8, 64); break; 271 case 0x7b: add_U2( 512, 8, 64); break; 272 case 0x7c: add_U2(1024, 8, 64); break; 273 case 0x7d: add_U2(2048, 8, 64); break; 274 case 0x7e: add_U2( 256, 8, 128); break; 275 case 0x7f: add_U2( 512, 2, 64); break; 276 case 0x80: add_U2( 512, 8, 64); break; 277 case 0x81: add_U2( 128, 8, 32); break; 278 case 0x82: add_U2( 256, 8, 32); break; 279 case 0x83: add_U2( 512, 8, 32); break; 280 case 0x84: add_U2(1024, 8, 32); break; 281 case 0x85: add_U2(2048, 8, 32); break; 282 case 0x86: add_U2( 512, 4, 64); break; 283 case 0x87: add_U2(1024, 8, 64); break; 284 285 /* Ignore prefetch information */ 286 case 0xf0: case 0xf1: 287 break; 288 289 case 0xff: 290 j = 0; 291 VG_(cpuid)(4, j++, (UInt*)&info[0], (UInt*)&info[4], 292 (UInt*)&info[8], (UInt*)&info[12]); 293 294 while ((info[0] & 0x1f) != 0) { 295 UInt assoc = ((*(UInt *)&info[4] >> 22) & 0x3ff) + 1; 296 UInt parts = ((*(UInt *)&info[4] >> 12) & 0x3ff) + 1; 297 UInt line_size = (*(UInt *)&info[4] & 0x7ff) + 1; 298 UInt sets = *(UInt *)&info[8] + 1; 299 300 UInt size = assoc * parts * line_size * sets / 1024; 301 302 switch ((info[0] & 0xe0) >> 5) 303 { 304 case 1: 305 switch (info[0] & 0x1f) 306 { 307 case 1: add_D1(size, assoc, line_size); break; 308 case 2: add_I1(size, assoc, line_size); break; 309 case 3: add_U1(size, assoc, line_size); break; 310 default: 311 VG_(debugLog)(1, "cache", 312 "warning: L1 cache of unknown type ignored\n"); 313 break; 314 } 315 break; 316 case 2: 317 switch (info[0] & 0x1f) 318 { 319 case 1: add_D2(size, assoc, line_size); break; 320 case 2: add_I2(size, assoc, line_size); break; 321 case 3: add_U2(size, assoc, line_size); break; 322 default: 323 VG_(debugLog)(1, "cache", 324 "warning: L2 cache of unknown type ignored\n"); 325 break; 326 } 327 break; 328 case 3: 329 switch (info[0] & 0x1f) 330 { 331 case 1: add_D3(size, assoc, line_size); break; 332 case 2: add_I3(size, assoc, line_size); break; 333 case 3: add_U3(size, assoc, line_size); break; 334 default: 335 VG_(debugLog)(1, "cache", 336 "warning: L3 cache of unknown type ignored\n"); 337 break; 338 } 339 break; 340 default: 341 VG_(debugLog)(1, "cache", "warning: L%u cache ignored\n", 342 (info[0] & 0xe0) >> 5); 343 break; 344 } 345 346 VG_(cpuid)(4, j++, (UInt*)&info[0], (UInt*)&info[4], 347 (UInt*)&info[8], (UInt*)&info[12]); 348 } 349 break; 350 351 default: 352 VG_(debugLog)(1, "cache", 353 "warning: Unknown Intel cache config value (0x%x), " 354 "ignoring\n", info[i]); 355 break; 356 } 357 } 358 359 return 0; 360 } 361 362 /* AMD method is straightforward, just extract appropriate bits from the 363 * result registers. 364 * 365 * Bits, for D1 and I1: 366 * 31..24 data L1 cache size in KBs 367 * 23..16 data L1 cache associativity (FFh=full) 368 * 15.. 8 data L1 cache lines per tag 369 * 7.. 0 data L1 cache line size in bytes 370 * 371 * Bits, for L2: 372 * 31..16 unified L2 cache size in KBs 373 * 15..12 unified L2 cache associativity (0=off, FFh=full) 374 * 11.. 8 unified L2 cache lines per tag 375 * 7.. 0 unified L2 cache line size in bytes 376 * 377 * #3 The AMD K7 processor's L2 cache must be configured prior to relying 378 * upon this information. (Whatever that means -- njn) 379 * 380 * Also, according to Cyrille Chepelov, Duron stepping A0 processors (model 381 * 0x630) have a bug and misreport their L2 size as 1KB (it's really 64KB), 382 * so we detect that. 383 * 384 * Returns 0 on success, non-zero on failure. As with the Intel code 385 * above, if a L3 cache is found, then data for it rather than the L2 386 * is returned via *LLc. 387 */ 388 389 /* A small helper */ 390 static Int 391 decode_AMD_cache_L2_L3_assoc ( Int bits_15_12 ) 392 { 393 /* Decode a L2/L3 associativity indication. It is encoded 394 differently from the I1/D1 associativity. Returns 1 395 (direct-map) as a safe but suboptimal result for unknown 396 encodings. */ 397 switch (bits_15_12 & 0xF) { 398 case 1: return 1; case 2: return 2; 399 case 4: return 4; case 6: return 8; 400 case 8: return 16; case 0xA: return 32; 401 case 0xB: return 48; case 0xC: return 64; 402 case 0xD: return 96; case 0xE: return 128; 403 case 0xF: /* fully associative */ 404 case 0: /* L2/L3 cache or TLB is disabled */ 405 default: 406 return 1; 407 } 408 } 409 410 static Int 411 AMD_cache_info(VexCacheInfo *ci) 412 { 413 UInt ext_level; 414 UInt dummy, model; 415 UInt I1i, D1i, L2i, L3i; 416 UInt size, line_size, assoc; 417 418 VG_(cpuid)(0x80000000, 0, &ext_level, &dummy, &dummy, &dummy); 419 420 if (0 == (ext_level & 0x80000000) || ext_level < 0x80000006) { 421 VG_(debugLog)(1, "cache", "warning: ext_level < 0x80000006 for AMD " 422 "processor (0x%x)\n", ext_level); 423 return -1; 424 } 425 426 VG_(cpuid)(0x80000005, 0, &dummy, &dummy, &D1i, &I1i); 427 VG_(cpuid)(0x80000006, 0, &dummy, &dummy, &L2i, &L3i); 428 429 VG_(cpuid)(0x1, 0, &model, &dummy, &dummy, &dummy); 430 431 /* Check for Duron bug */ 432 if (model == 0x630) { 433 VG_(debugLog)(1, "cache", "warning: Buggy Duron stepping A0. " 434 "Assuming L2 size=65536 bytes\n"); 435 L2i = (64 << 16) | (L2i & 0xffff); 436 } 437 438 ci->num_levels = 2; 439 ci->num_caches = 3; 440 ci->icaches_maintain_coherence = True; 441 442 /* Check for L3 cache */ 443 if (((L3i >> 18) & 0x3fff) > 0) { 444 ci->num_levels = 3; 445 ci->num_caches = 4; 446 } 447 448 ci->caches = VG_(malloc)("m_cache", ci->num_caches * sizeof *ci->caches); 449 450 // D1 451 size = (D1i >> 24) & 0xff; 452 assoc = (D1i >> 16) & 0xff; 453 line_size = (D1i >> 0) & 0xff; 454 ci->caches[0] = VEX_CACHE_INIT(DATA_CACHE, 1, size, line_size, assoc); 455 456 // I1 457 size = (I1i >> 24) & 0xff; 458 assoc = (I1i >> 16) & 0xff; 459 line_size = (I1i >> 0) & 0xff; 460 ci->caches[1] = VEX_CACHE_INIT(INSN_CACHE, 1, size, line_size, assoc); 461 462 // L2 Nb: different bits used for L2 463 size = (L2i >> 16) & 0xffff; 464 assoc = decode_AMD_cache_L2_L3_assoc((L2i >> 12) & 0xf); 465 line_size = (L2i >> 0) & 0xff; 466 ci->caches[2] = VEX_CACHE_INIT(UNIFIED_CACHE, 2, size, line_size, assoc); 467 468 // L3, if any 469 if (((L3i >> 18) & 0x3fff) > 0) { 470 /* There's an L3 cache. */ 471 /* NB: the test in the if is "if L3 size > 0 ". I don't know if 472 this is the right way to test presence-vs-absence of L3. I 473 can't see any guidance on this in the AMD documentation. */ 474 size = ((L3i >> 18) & 0x3fff) * 512; 475 assoc = decode_AMD_cache_L2_L3_assoc((L3i >> 12) & 0xf); 476 line_size = (L3i >> 0) & 0xff; 477 ci->caches[3] = VEX_CACHE_INIT(UNIFIED_CACHE, 3, size, line_size, assoc); 478 } 479 480 return 0; 481 } 482 483 static Int 484 get_caches_from_CPUID(VexCacheInfo *ci) 485 { 486 Int ret, i; 487 UInt level; 488 HChar vendor_id[13]; 489 490 vg_assert(VG_(has_cpuid)()); 491 492 VG_(cpuid)(0, 0, &level, (UInt*)&vendor_id[0], 493 (UInt*)&vendor_id[8], (UInt*)&vendor_id[4]); 494 vendor_id[12] = '\0'; 495 496 if (0 == level) { // CPUID level is 0, early Pentium? 497 return -1; 498 } 499 500 /* Only handling Intel and AMD chips... no Cyrix, Transmeta, etc */ 501 if (0 == VG_(strcmp)(vendor_id, "GenuineIntel")) { 502 ret = Intel_cache_info(level, ci); 503 504 } else if (0 == VG_(strcmp)(vendor_id, "AuthenticAMD")) { 505 ret = AMD_cache_info(ci); 506 507 } else if (0 == VG_(strcmp)(vendor_id, "CentaurHauls")) { 508 /* Total kludge. Pretend to be a VIA Nehemiah. */ 509 ci->num_levels = 2; 510 ci->num_caches = 3; 511 ci->icaches_maintain_coherence = True; 512 ci->caches = VG_(malloc)("m_cache", ci->num_caches * sizeof *ci->caches); 513 ci->caches[0] = VEX_CACHE_INIT(DATA_CACHE, 1, 64, 16, 16); 514 ci->caches[1] = VEX_CACHE_INIT(INSN_CACHE, 1, 64, 16, 4); 515 ci->caches[2] = VEX_CACHE_INIT(UNIFIED_CACHE, 2, 64, 16, 16); 516 517 ret = 0; 518 519 } else { 520 VG_(debugLog)(1, "cache", "CPU vendor ID not recognised (%s)\n", 521 vendor_id); 522 return -1; 523 } 524 525 /* Successful! Convert sizes from KB to bytes */ 526 for (i = 0; i < ci->num_caches; ++i) { 527 ci->caches[i].sizeB *= 1024; 528 } 529 530 return ret; 531 } 532 533 static Bool 534 get_cache_info(VexArchInfo *vai) 535 { 536 Int ret = get_caches_from_CPUID(&vai->hwcache_info); 537 538 return ret == 0 ? True : False; 539 } 540 541 #elif defined(VGA_arm) || defined(VGA_ppc32) || \ 542 defined(VGA_ppc64be) || defined(VGA_ppc64le) || \ 543 defined(VGA_mips32) || defined(VGA_mips64) || defined(VGA_arm64) || \ 544 defined(VGA_tilegx) 545 static Bool 546 get_cache_info(VexArchInfo *vai) 547 { 548 vai->hwcache_info.icaches_maintain_coherence = False; 549 550 return False; // not yet 551 } 552 553 #elif defined(VGA_s390x) 554 555 static ULong 556 ecag(UInt ai, UInt li, UInt ti) 557 { 558 register ULong result asm("2") = 0; 559 register ULong input asm("3") = (ai << 4) | (li << 1) | ti; 560 561 asm volatile(".short 0xeb20\n\t" 562 ".long 0x3000004c\n\t" 563 : "=d" (result) : "d" (input)); 564 565 return result; 566 } 567 568 static UInt 569 get_cache_info_for_level(ULong topology, UInt level) 570 { 571 return (topology >> (56 - level * 8)) & 0xff; 572 } 573 574 static ULong 575 get_line_size(UInt level, Bool is_insn_cache) 576 { 577 return ecag(1, level, is_insn_cache); 578 } 579 580 static ULong 581 get_total_size(UInt level, Bool is_insn_cache) 582 { 583 return ecag(2, level, is_insn_cache); 584 } 585 586 static ULong 587 get_associativity(UInt level, Bool is_insn_cache) 588 { 589 return ecag(3, level, is_insn_cache); 590 } 591 592 static VexCache 593 get_cache(UInt level, VexCacheKind kind) 594 { 595 Bool is_insn_cache = kind == INSN_CACHE; 596 UInt size = get_total_size(level, is_insn_cache); 597 UInt line_size = get_line_size(level, is_insn_cache); 598 UInt assoc = get_associativity(level, is_insn_cache); 599 600 return VEX_CACHE_INIT(kind, level + 1, size, line_size, assoc); 601 } 602 603 static Bool 604 get_cache_info(VexArchInfo *vai) 605 { 606 VexCacheInfo *ci = &vai->hwcache_info; 607 608 ci->icaches_maintain_coherence = True; 609 610 if (! (vai->hwcaps & VEX_HWCAPS_S390X_GIE)) { 611 // ECAG is not available 612 return False; 613 } 614 615 UInt level, cache_kind, info, i; 616 ULong topology = ecag(0, 0, 0); // get summary 617 618 /* ECAG supports at most 8 levels of cache. Find out how many levels 619 of cache and how many caches there are. */ 620 ci->num_levels = 0; 621 ci->num_caches = 0; 622 for (level = 0; level < 8; level++) { 623 info = get_cache_info_for_level(topology, level); 624 625 if ((info & 0xc) == 0) break; // cache does not exist at this level 626 ++ci->num_levels; 627 628 cache_kind = info & 0x3; 629 switch (cache_kind) { 630 case 0: ci->num_caches += 2; break; /* separate data and insn cache */ 631 case 1: ci->num_caches += 1; break; /* only insn cache */ 632 case 2: ci->num_caches += 1; break; /* only data cache */ 633 case 3: ci->num_caches += 1; break; /* unified data and insn cache */ 634 } 635 } 636 637 ci->caches = VG_(malloc)("m_cache", ci->num_caches * sizeof *ci->caches); 638 639 i = 0; 640 for (level = 0; level < ci->num_levels; level++) { 641 info = get_cache_info_for_level(topology, level); 642 cache_kind = info & 0x3; 643 switch (cache_kind) { 644 case 0: /* separate data and insn cache */ 645 ci->caches[i++] = get_cache(level, INSN_CACHE); 646 ci->caches[i++] = get_cache(level, DATA_CACHE); 647 break; 648 649 case 1: /* only insn cache */ 650 ci->caches[i++] = get_cache(level, INSN_CACHE); 651 break; 652 653 case 2: /* only data cache */ 654 ci->caches[i++] = get_cache(level, DATA_CACHE); 655 break; 656 657 case 3: /* unified data and insn cache */ 658 ci->caches[i++] = get_cache(level, UNIFIED_CACHE); 659 break; 660 } 661 } 662 return True; 663 } 664 665 #else 666 667 #error "Unknown arch" 668 669 #endif 670 671 /* Debug information */ 672 static void 673 write_cache_info(const VexCacheInfo *ci) 674 { 675 UInt i; 676 677 VG_(debugLog)(1, "cache", "Cache info:\n"); 678 VG_(debugLog)(1, "cache", " #levels = %u\n", ci->num_levels); 679 VG_(debugLog)(1, "cache", " #caches = %u\n", ci->num_caches); 680 for (i = 0; i < ci->num_caches; ++i) { 681 VexCache *c = ci->caches + i; 682 const HChar *kind; 683 VG_(debugLog)(1, "cache", " cache #%u:\n", i); 684 switch (c->kind) { 685 case INSN_CACHE: kind = "insn"; break; 686 case DATA_CACHE: kind = "data"; break; 687 case UNIFIED_CACHE: kind = "unified"; break; 688 default: kind = "unknown"; break; 689 } 690 VG_(debugLog)(1, "cache", " kind = %s\n", kind); 691 VG_(debugLog)(1, "cache", " level = %u\n", c->level); 692 VG_(debugLog)(1, "cache", " size = %u bytes\n", c->sizeB); 693 VG_(debugLog)(1, "cache", " linesize = %u bytes\n", c->line_sizeB); 694 VG_(debugLog)(1, "cache", " assoc = %u\n", c->assoc); 695 } 696 } 697 698 static Bool 699 cache_info_is_sensible(const VexCacheInfo *ci) 700 { 701 UInt level, i; 702 Bool sensible = True; 703 704 /* There must be at most one cache of a given kind at the same level. 705 If there is a unified cache at a given level, no other cache may 706 exist at that level. */ 707 for (level = 1; level <= ci->num_levels; ++level) { 708 UInt num_icache, num_dcache, num_ucache; 709 710 num_icache = num_dcache = num_ucache = 0; 711 for (i = 0; i < ci->num_caches; ++i) { 712 if (ci->caches[i].level == level) { 713 switch (ci->caches[i].kind) { 714 case INSN_CACHE: ++num_icache; break; 715 case DATA_CACHE: ++num_dcache; break; 716 case UNIFIED_CACHE: ++num_ucache; break; 717 } 718 } 719 } 720 if (num_icache == 0 && num_dcache == 0 && num_ucache == 0) { 721 VG_(debugLog)(1, "cache", "warning: No caches at level %u\n", level); 722 sensible = False; 723 } 724 if (num_icache > 1 || num_dcache > 1 || num_ucache > 1) { 725 VG_(debugLog)(1, "cache", "warning: More than one cache of a given " 726 "kind at level %u\n", level); 727 sensible = False; 728 } 729 if (num_ucache != 0 && (num_icache > 0 || num_dcache > 0)) { 730 VG_(debugLog)(1, "cache", "warning: Unified cache and I/D cache " 731 "at level %u\n", level); 732 sensible = False; 733 } 734 } 735 736 /* If there is a cache at level N > 1 there must be a cache at level N-1 */ 737 for (level = 2; level <= ci->num_levels; ++level) { 738 Bool found = False; 739 for (i = 0; i < ci->num_caches; ++i) { 740 if (ci->caches[i].level == level - 1) { 741 found = True; 742 break; 743 } 744 } 745 if (! found) { 746 VG_(debugLog)(1, "cache", "warning: Cache at level %u but no cache " 747 "at level %u\n", level, level - 1); 748 sensible = False; 749 } 750 } 751 752 return sensible; 753 } 754 755 756 /* Autodetect the cache information for this host and stuff it into 757 VexArchInfo::hwcache_info. Return True if successful. */ 758 Bool 759 VG_(machine_get_cache_info)(VexArchInfo *vai) 760 { 761 Bool ok = get_cache_info(vai); 762 763 VexCacheInfo *ci = &vai->hwcache_info; 764 765 if (! ok) { 766 VG_(debugLog)(1, "cache", "Could not autodetect cache info\n"); 767 } else { 768 ok = cache_info_is_sensible(ci); 769 770 if (! ok) { 771 VG_(debugLog)(1, "cache", 772 "Autodetected cache info is not sensible\n"); 773 } else { 774 VG_(debugLog)(1, "cache", 775 "Autodetected cache info is sensible\n"); 776 } 777 write_cache_info(ci); /* write out for debugging */ 778 } 779 780 if (! ok ) { 781 /* Reset cache info */ 782 ci->num_levels = 0; 783 ci->num_caches = 0; 784 VG_(free)(ci->caches); 785 ci->caches = NULL; 786 } 787 788 return ok; 789 } 790 791 /*--------------------------------------------------------------------*/ 792 /*--- end ---*/ 793 /*--------------------------------------------------------------------*/ 794
