1/* 2 * Copyright (c) 2010, 2012-2018 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2009 The Regents of The University of Michigan 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Gabe Black 41 */ 42 43#ifndef __ARCH_ARM_ISA_HH__ 44#define __ARCH_ARM_ISA_HH__ 45 46#include "arch/arm/isa_device.hh" 47#include "arch/arm/miscregs.hh" 48#include "arch/arm/registers.hh" 49#include "arch/arm/system.hh" 50#include "arch/arm/tlb.hh" 51#include "arch/arm/types.hh" 52#include "arch/generic/traits.hh" 53#include "debug/Checkpoint.hh" 54#include "enums/VecRegRenameMode.hh" 55#include "sim/sim_object.hh" 56#include "enums/DecoderFlavour.hh" 57 58struct ArmISAParams; 59struct DummyArmISADeviceParams; 60class ThreadContext; 61class Checkpoint; 62class EventManager; 63 64namespace ArmISA 65{ 66 class ISA : public SimObject 67 { 68 protected: 69 // Parent system 70 ArmSystem *system; 71 72 // Micro Architecture 73 const Enums::DecoderFlavour _decoderFlavour; 74 const Enums::VecRegRenameMode _vecRegRenameMode; 75 76 /** Dummy device for to handle non-existing ISA devices */ 77 DummyISADevice dummyDevice; 78 79 // PMU belonging to this ISA 80 BaseISADevice *pmu; 81 82 // Generic timer interface belonging to this ISA 83 std::unique_ptr<BaseISADevice> timer; 84 85 // Cached copies of system-level properties 86 bool highestELIs64; 87 bool haveSecurity; 88 bool haveLPAE; 89 bool haveVirtualization;
| 1/* 2 * Copyright (c) 2010, 2012-2018 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2009 The Regents of The University of Michigan 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Gabe Black 41 */ 42 43#ifndef __ARCH_ARM_ISA_HH__ 44#define __ARCH_ARM_ISA_HH__ 45 46#include "arch/arm/isa_device.hh" 47#include "arch/arm/miscregs.hh" 48#include "arch/arm/registers.hh" 49#include "arch/arm/system.hh" 50#include "arch/arm/tlb.hh" 51#include "arch/arm/types.hh" 52#include "arch/generic/traits.hh" 53#include "debug/Checkpoint.hh" 54#include "enums/VecRegRenameMode.hh" 55#include "sim/sim_object.hh" 56#include "enums/DecoderFlavour.hh" 57 58struct ArmISAParams; 59struct DummyArmISADeviceParams; 60class ThreadContext; 61class Checkpoint; 62class EventManager; 63 64namespace ArmISA 65{ 66 class ISA : public SimObject 67 { 68 protected: 69 // Parent system 70 ArmSystem *system; 71 72 // Micro Architecture 73 const Enums::DecoderFlavour _decoderFlavour; 74 const Enums::VecRegRenameMode _vecRegRenameMode; 75 76 /** Dummy device for to handle non-existing ISA devices */ 77 DummyISADevice dummyDevice; 78 79 // PMU belonging to this ISA 80 BaseISADevice *pmu; 81 82 // Generic timer interface belonging to this ISA 83 std::unique_ptr<BaseISADevice> timer; 84 85 // Cached copies of system-level properties 86 bool highestELIs64; 87 bool haveSecurity; 88 bool haveLPAE; 89 bool haveVirtualization;
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90 bool haveLargeAsid64; 91 uint8_t physAddrRange; 92 93 /** 94 * If true, accesses to IMPLEMENTATION DEFINED registers are treated 95 * as NOP hence not causing UNDEFINED INSTRUCTION. 96 */ 97 bool impdefAsNop; 98 99 /** MiscReg metadata **/ 100 struct MiscRegLUTEntry { 101 uint32_t lower; // Lower half mapped to this register 102 uint32_t upper; // Upper half mapped to this register 103 uint64_t _reset; // value taken on reset (i.e. initialization) 104 uint64_t _res0; // reserved 105 uint64_t _res1; // reserved 106 uint64_t _raz; // read as zero (fixed at 0) 107 uint64_t _rao; // read as one (fixed at 1) 108 public: 109 MiscRegLUTEntry() : 110 lower(0), upper(0), 111 _reset(0), _res0(0), _res1(0), _raz(0), _rao(0) {} 112 uint64_t reset() const { return _reset; } 113 uint64_t res0() const { return _res0; } 114 uint64_t res1() const { return _res1; } 115 uint64_t raz() const { return _raz; } 116 uint64_t rao() const { return _rao; } 117 // raz/rao implies writes ignored 118 uint64_t wi() const { return _raz | _rao; } 119 }; 120 121 /** Metadata table accessible via the value of the register */ 122 static std::vector<struct MiscRegLUTEntry> lookUpMiscReg; 123 124 class MiscRegLUTEntryInitializer { 125 struct MiscRegLUTEntry &entry; 126 std::bitset<NUM_MISCREG_INFOS> &info; 127 typedef const MiscRegLUTEntryInitializer& chain; 128 public: 129 chain mapsTo(uint32_t l, uint32_t u = 0) const { 130 entry.lower = l; 131 entry.upper = u; 132 return *this; 133 } 134 chain res0(uint64_t mask) const { 135 entry._res0 = mask; 136 return *this; 137 } 138 chain res1(uint64_t mask) const { 139 entry._res1 = mask; 140 return *this; 141 } 142 chain raz(uint64_t mask) const { 143 entry._raz = mask; 144 return *this; 145 } 146 chain rao(uint64_t mask) const { 147 entry._rao = mask; 148 return *this; 149 } 150 chain implemented(bool v = true) const { 151 info[MISCREG_IMPLEMENTED] = v; 152 return *this; 153 } 154 chain unimplemented() const { 155 return implemented(false); 156 } 157 chain unverifiable(bool v = true) const { 158 info[MISCREG_UNVERIFIABLE] = v; 159 return *this; 160 } 161 chain warnNotFail(bool v = true) const { 162 info[MISCREG_WARN_NOT_FAIL] = v; 163 return *this; 164 } 165 chain mutex(bool v = true) const { 166 info[MISCREG_MUTEX] = v; 167 return *this; 168 } 169 chain banked(bool v = true) const { 170 info[MISCREG_BANKED] = v; 171 return *this; 172 } 173 chain bankedChild(bool v = true) const { 174 info[MISCREG_BANKED_CHILD] = v; 175 return *this; 176 } 177 chain userNonSecureRead(bool v = true) const { 178 info[MISCREG_USR_NS_RD] = v; 179 return *this; 180 } 181 chain userNonSecureWrite(bool v = true) const { 182 info[MISCREG_USR_NS_WR] = v; 183 return *this; 184 } 185 chain userSecureRead(bool v = true) const { 186 info[MISCREG_USR_S_RD] = v; 187 return *this; 188 } 189 chain userSecureWrite(bool v = true) const { 190 info[MISCREG_USR_S_WR] = v; 191 return *this; 192 } 193 chain user(bool v = true) const { 194 userNonSecureRead(v); 195 userNonSecureWrite(v); 196 userSecureRead(v); 197 userSecureWrite(v); 198 return *this; 199 } 200 chain privNonSecureRead(bool v = true) const { 201 info[MISCREG_PRI_NS_RD] = v; 202 return *this; 203 } 204 chain privNonSecureWrite(bool v = true) const { 205 info[MISCREG_PRI_NS_WR] = v; 206 return *this; 207 } 208 chain privNonSecure(bool v = true) const { 209 privNonSecureRead(v); 210 privNonSecureWrite(v); 211 return *this; 212 } 213 chain privSecureRead(bool v = true) const { 214 info[MISCREG_PRI_S_RD] = v; 215 return *this; 216 } 217 chain privSecureWrite(bool v = true) const { 218 info[MISCREG_PRI_S_WR] = v; 219 return *this; 220 } 221 chain privSecure(bool v = true) const { 222 privSecureRead(v); 223 privSecureWrite(v); 224 return *this; 225 } 226 chain priv(bool v = true) const { 227 privSecure(v); 228 privNonSecure(v); 229 return *this; 230 } 231 chain hypRead(bool v = true) const { 232 info[MISCREG_HYP_RD] = v; 233 return *this; 234 } 235 chain hypWrite(bool v = true) const { 236 info[MISCREG_HYP_WR] = v; 237 return *this; 238 } 239 chain hyp(bool v = true) const { 240 hypRead(v); 241 hypWrite(v); 242 return *this; 243 } 244 chain monSecureRead(bool v = true) const { 245 info[MISCREG_MON_NS0_RD] = v; 246 return *this; 247 } 248 chain monSecureWrite(bool v = true) const { 249 info[MISCREG_MON_NS0_WR] = v; 250 return *this; 251 } 252 chain monNonSecureRead(bool v = true) const { 253 info[MISCREG_MON_NS1_RD] = v; 254 return *this; 255 } 256 chain monNonSecureWrite(bool v = true) const { 257 info[MISCREG_MON_NS1_WR] = v; 258 return *this; 259 } 260 chain mon(bool v = true) const { 261 monSecureRead(v); 262 monSecureWrite(v); 263 monNonSecureRead(v); 264 monNonSecureWrite(v); 265 return *this; 266 } 267 chain monSecure(bool v = true) const { 268 monSecureRead(v); 269 monSecureWrite(v); 270 return *this; 271 } 272 chain monNonSecure(bool v = true) const { 273 monNonSecureRead(v); 274 monNonSecureWrite(v); 275 return *this; 276 } 277 chain allPrivileges(bool v = true) const { 278 userNonSecureRead(v); 279 userNonSecureWrite(v); 280 userSecureRead(v); 281 userSecureWrite(v); 282 privNonSecureRead(v); 283 privNonSecureWrite(v); 284 privSecureRead(v); 285 privSecureWrite(v); 286 hypRead(v); 287 hypWrite(v); 288 monSecureRead(v); 289 monSecureWrite(v); 290 monNonSecureRead(v); 291 monNonSecureWrite(v); 292 return *this; 293 } 294 chain nonSecure(bool v = true) const { 295 userNonSecureRead(v); 296 userNonSecureWrite(v); 297 privNonSecureRead(v); 298 privNonSecureWrite(v); 299 hypRead(v); 300 hypWrite(v); 301 monNonSecureRead(v); 302 monNonSecureWrite(v); 303 return *this; 304 } 305 chain secure(bool v = true) const { 306 userSecureRead(v); 307 userSecureWrite(v); 308 privSecureRead(v); 309 privSecureWrite(v); 310 monSecureRead(v); 311 monSecureWrite(v); 312 return *this; 313 } 314 chain reads(bool v) const { 315 userNonSecureRead(v); 316 userSecureRead(v); 317 privNonSecureRead(v); 318 privSecureRead(v); 319 hypRead(v); 320 monSecureRead(v); 321 monNonSecureRead(v); 322 return *this; 323 } 324 chain writes(bool v) const { 325 userNonSecureWrite(v); 326 userSecureWrite(v); 327 privNonSecureWrite(v); 328 privSecureWrite(v); 329 hypWrite(v); 330 monSecureWrite(v); 331 monNonSecureWrite(v); 332 return *this; 333 } 334 chain exceptUserMode() const { 335 user(0); 336 return *this; 337 } 338 MiscRegLUTEntryInitializer(struct MiscRegLUTEntry &e, 339 std::bitset<NUM_MISCREG_INFOS> &i) 340 : entry(e), 341 info(i) 342 { 343 // force unimplemented registers to be thusly declared 344 implemented(1); 345 } 346 }; 347 348 const MiscRegLUTEntryInitializer InitReg(uint32_t reg) { 349 return MiscRegLUTEntryInitializer(lookUpMiscReg[reg], 350 miscRegInfo[reg]); 351 } 352 353 void initializeMiscRegMetadata(); 354 355 MiscReg miscRegs[NumMiscRegs]; 356 const IntRegIndex *intRegMap; 357 358 void 359 updateRegMap(CPSR cpsr) 360 { 361 if (cpsr.width == 0) { 362 intRegMap = IntReg64Map; 363 } else { 364 switch (cpsr.mode) { 365 case MODE_USER: 366 case MODE_SYSTEM: 367 intRegMap = IntRegUsrMap; 368 break; 369 case MODE_FIQ: 370 intRegMap = IntRegFiqMap; 371 break; 372 case MODE_IRQ: 373 intRegMap = IntRegIrqMap; 374 break; 375 case MODE_SVC: 376 intRegMap = IntRegSvcMap; 377 break; 378 case MODE_MON: 379 intRegMap = IntRegMonMap; 380 break; 381 case MODE_ABORT: 382 intRegMap = IntRegAbtMap; 383 break; 384 case MODE_HYP: 385 intRegMap = IntRegHypMap; 386 break; 387 case MODE_UNDEFINED: 388 intRegMap = IntRegUndMap; 389 break; 390 default: 391 panic("Unrecognized mode setting in CPSR.\n"); 392 } 393 } 394 } 395 396 BaseISADevice &getGenericTimer(ThreadContext *tc); 397 398 399 private: 400 inline void assert32(ThreadContext *tc) { 401 CPSR cpsr M5_VAR_USED = readMiscReg(MISCREG_CPSR, tc); 402 assert(cpsr.width); 403 } 404 405 inline void assert64(ThreadContext *tc) { 406 CPSR cpsr M5_VAR_USED = readMiscReg(MISCREG_CPSR, tc); 407 assert(!cpsr.width); 408 } 409 410 public: 411 void clear(); 412 413 protected: 414 void clear64(const ArmISAParams *p); 415 void initID32(const ArmISAParams *p); 416 void initID64(const ArmISAParams *p); 417 418 public: 419 MiscReg readMiscRegNoEffect(int misc_reg) const; 420 MiscReg readMiscReg(int misc_reg, ThreadContext *tc); 421 void setMiscRegNoEffect(int misc_reg, const MiscReg &val); 422 void setMiscReg(int misc_reg, const MiscReg &val, ThreadContext *tc); 423 424 RegId 425 flattenRegId(const RegId& regId) const 426 { 427 switch (regId.classValue()) { 428 case IntRegClass: 429 return RegId(IntRegClass, flattenIntIndex(regId.index())); 430 case FloatRegClass: 431 return RegId(FloatRegClass, flattenFloatIndex(regId.index())); 432 case VecRegClass: 433 return RegId(VecRegClass, flattenVecIndex(regId.index())); 434 case VecElemClass: 435 return RegId(VecElemClass, flattenVecElemIndex(regId.index())); 436 case CCRegClass: 437 return RegId(CCRegClass, flattenCCIndex(regId.index())); 438 case MiscRegClass: 439 return RegId(MiscRegClass, flattenMiscIndex(regId.index())); 440 } 441 return RegId(); 442 } 443 444 int 445 flattenIntIndex(int reg) const 446 { 447 assert(reg >= 0); 448 if (reg < NUM_ARCH_INTREGS) { 449 return intRegMap[reg]; 450 } else if (reg < NUM_INTREGS) { 451 return reg; 452 } else if (reg == INTREG_SPX) { 453 CPSR cpsr = miscRegs[MISCREG_CPSR]; 454 ExceptionLevel el = opModeToEL( 455 (OperatingMode) (uint8_t) cpsr.mode); 456 if (!cpsr.sp && el != EL0) 457 return INTREG_SP0; 458 switch (el) { 459 case EL3: 460 return INTREG_SP3; 461 case EL2: 462 return INTREG_SP2; 463 case EL1: 464 return INTREG_SP1; 465 case EL0: 466 return INTREG_SP0; 467 default: 468 panic("Invalid exception level"); 469 return 0; // Never happens. 470 } 471 } else { 472 return flattenIntRegModeIndex(reg); 473 } 474 } 475 476 int 477 flattenFloatIndex(int reg) const 478 { 479 assert(reg >= 0); 480 return reg; 481 } 482 483 int 484 flattenVecIndex(int reg) const 485 { 486 assert(reg >= 0); 487 return reg; 488 } 489 490 int 491 flattenVecElemIndex(int reg) const 492 { 493 assert(reg >= 0); 494 return reg; 495 } 496 497 int 498 flattenCCIndex(int reg) const 499 { 500 assert(reg >= 0); 501 return reg; 502 } 503 504 int 505 flattenMiscIndex(int reg) const 506 { 507 assert(reg >= 0); 508 int flat_idx = reg; 509 510 if (reg == MISCREG_SPSR) { 511 CPSR cpsr = miscRegs[MISCREG_CPSR]; 512 switch (cpsr.mode) { 513 case MODE_EL0T: 514 warn("User mode does not have SPSR\n"); 515 flat_idx = MISCREG_SPSR; 516 break; 517 case MODE_EL1T: 518 case MODE_EL1H: 519 flat_idx = MISCREG_SPSR_EL1; 520 break; 521 case MODE_EL2T: 522 case MODE_EL2H: 523 flat_idx = MISCREG_SPSR_EL2; 524 break; 525 case MODE_EL3T: 526 case MODE_EL3H: 527 flat_idx = MISCREG_SPSR_EL3; 528 break; 529 case MODE_USER: 530 warn("User mode does not have SPSR\n"); 531 flat_idx = MISCREG_SPSR; 532 break; 533 case MODE_FIQ: 534 flat_idx = MISCREG_SPSR_FIQ; 535 break; 536 case MODE_IRQ: 537 flat_idx = MISCREG_SPSR_IRQ; 538 break; 539 case MODE_SVC: 540 flat_idx = MISCREG_SPSR_SVC; 541 break; 542 case MODE_MON: 543 flat_idx = MISCREG_SPSR_MON; 544 break; 545 case MODE_ABORT: 546 flat_idx = MISCREG_SPSR_ABT; 547 break; 548 case MODE_HYP: 549 flat_idx = MISCREG_SPSR_HYP; 550 break; 551 case MODE_UNDEFINED: 552 flat_idx = MISCREG_SPSR_UND; 553 break; 554 default: 555 warn("Trying to access SPSR in an invalid mode: %d\n", 556 cpsr.mode); 557 flat_idx = MISCREG_SPSR; 558 break; 559 } 560 } else if (miscRegInfo[reg][MISCREG_MUTEX]) { 561 // Mutually exclusive CP15 register 562 switch (reg) { 563 case MISCREG_PRRR_MAIR0: 564 case MISCREG_PRRR_MAIR0_NS: 565 case MISCREG_PRRR_MAIR0_S: 566 { 567 TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR); 568 // If the muxed reg has been flattened, work out the 569 // offset and apply it to the unmuxed reg 570 int idxOffset = reg - MISCREG_PRRR_MAIR0; 571 if (ttbcr.eae) 572 flat_idx = flattenMiscIndex(MISCREG_MAIR0 + 573 idxOffset); 574 else 575 flat_idx = flattenMiscIndex(MISCREG_PRRR + 576 idxOffset); 577 } 578 break; 579 case MISCREG_NMRR_MAIR1: 580 case MISCREG_NMRR_MAIR1_NS: 581 case MISCREG_NMRR_MAIR1_S: 582 { 583 TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR); 584 // If the muxed reg has been flattened, work out the 585 // offset and apply it to the unmuxed reg 586 int idxOffset = reg - MISCREG_NMRR_MAIR1; 587 if (ttbcr.eae) 588 flat_idx = flattenMiscIndex(MISCREG_MAIR1 + 589 idxOffset); 590 else 591 flat_idx = flattenMiscIndex(MISCREG_NMRR + 592 idxOffset); 593 } 594 break; 595 case MISCREG_PMXEVTYPER_PMCCFILTR: 596 { 597 PMSELR pmselr = miscRegs[MISCREG_PMSELR]; 598 if (pmselr.sel == 31) 599 flat_idx = flattenMiscIndex(MISCREG_PMCCFILTR); 600 else 601 flat_idx = flattenMiscIndex(MISCREG_PMXEVTYPER); 602 } 603 break; 604 default: 605 panic("Unrecognized misc. register.\n"); 606 break; 607 } 608 } else { 609 if (miscRegInfo[reg][MISCREG_BANKED]) { 610 bool secureReg = haveSecurity && !highestELIs64 && 611 inSecureState(miscRegs[MISCREG_SCR], 612 miscRegs[MISCREG_CPSR]); 613 flat_idx += secureReg ? 2 : 1; 614 } 615 } 616 return flat_idx; 617 } 618 619 std::pair<int,int> getMiscIndices(int misc_reg) const 620 { 621 // Note: indexes of AArch64 registers are left unchanged 622 int flat_idx = flattenMiscIndex(misc_reg); 623 624 if (lookUpMiscReg[flat_idx].lower == 0) { 625 return std::make_pair(flat_idx, 0); 626 } 627 628 // do additional S/NS flattenings if mapped to NS while in S 629 bool S = haveSecurity && !highestELIs64 && 630 inSecureState(miscRegs[MISCREG_SCR], 631 miscRegs[MISCREG_CPSR]); 632 int lower = lookUpMiscReg[flat_idx].lower; 633 int upper = lookUpMiscReg[flat_idx].upper; 634 // upper == 0, which is CPSR, is not MISCREG_BANKED_CHILD (no-op) 635 lower += S && miscRegInfo[lower][MISCREG_BANKED_CHILD]; 636 upper += S && miscRegInfo[upper][MISCREG_BANKED_CHILD]; 637 return std::make_pair(lower, upper); 638 } 639 640 void serialize(CheckpointOut &cp) const 641 { 642 DPRINTF(Checkpoint, "Serializing Arm Misc Registers\n"); 643 SERIALIZE_ARRAY(miscRegs, NUM_PHYS_MISCREGS); 644 645 SERIALIZE_SCALAR(highestELIs64); 646 SERIALIZE_SCALAR(haveSecurity); 647 SERIALIZE_SCALAR(haveLPAE); 648 SERIALIZE_SCALAR(haveVirtualization); 649 SERIALIZE_SCALAR(haveLargeAsid64); 650 SERIALIZE_SCALAR(physAddrRange); 651 } 652 void unserialize(CheckpointIn &cp) 653 { 654 DPRINTF(Checkpoint, "Unserializing Arm Misc Registers\n"); 655 UNSERIALIZE_ARRAY(miscRegs, NUM_PHYS_MISCREGS); 656 CPSR tmp_cpsr = miscRegs[MISCREG_CPSR]; 657 updateRegMap(tmp_cpsr); 658 659 UNSERIALIZE_SCALAR(highestELIs64); 660 UNSERIALIZE_SCALAR(haveSecurity); 661 UNSERIALIZE_SCALAR(haveLPAE); 662 UNSERIALIZE_SCALAR(haveVirtualization); 663 UNSERIALIZE_SCALAR(haveLargeAsid64); 664 UNSERIALIZE_SCALAR(physAddrRange); 665 } 666 667 void startup(ThreadContext *tc); 668 669 Enums::DecoderFlavour decoderFlavour() const { return _decoderFlavour; } 670 671 Enums::VecRegRenameMode 672 vecRegRenameMode() const 673 { 674 return _vecRegRenameMode; 675 } 676 677 /// Explicitly import the otherwise hidden startup 678 using SimObject::startup; 679 680 typedef ArmISAParams Params; 681 682 const Params *params() const; 683 684 ISA(Params *p); 685 }; 686} 687 688template<> 689struct initRenameMode<ArmISA::ISA> 690{ 691 static Enums::VecRegRenameMode mode(const ArmISA::ISA* isa) 692 { 693 return isa->vecRegRenameMode(); 694 } 695 static bool equals(const ArmISA::ISA* isa1, const ArmISA::ISA* isa2) 696 { 697 return mode(isa1) == mode(isa2); 698 } 699}; 700 701#endif
| 91 bool haveLargeAsid64; 92 uint8_t physAddrRange; 93 94 /** 95 * If true, accesses to IMPLEMENTATION DEFINED registers are treated 96 * as NOP hence not causing UNDEFINED INSTRUCTION. 97 */ 98 bool impdefAsNop; 99 100 /** MiscReg metadata **/ 101 struct MiscRegLUTEntry { 102 uint32_t lower; // Lower half mapped to this register 103 uint32_t upper; // Upper half mapped to this register 104 uint64_t _reset; // value taken on reset (i.e. initialization) 105 uint64_t _res0; // reserved 106 uint64_t _res1; // reserved 107 uint64_t _raz; // read as zero (fixed at 0) 108 uint64_t _rao; // read as one (fixed at 1) 109 public: 110 MiscRegLUTEntry() : 111 lower(0), upper(0), 112 _reset(0), _res0(0), _res1(0), _raz(0), _rao(0) {} 113 uint64_t reset() const { return _reset; } 114 uint64_t res0() const { return _res0; } 115 uint64_t res1() const { return _res1; } 116 uint64_t raz() const { return _raz; } 117 uint64_t rao() const { return _rao; } 118 // raz/rao implies writes ignored 119 uint64_t wi() const { return _raz | _rao; } 120 }; 121 122 /** Metadata table accessible via the value of the register */ 123 static std::vector<struct MiscRegLUTEntry> lookUpMiscReg; 124 125 class MiscRegLUTEntryInitializer { 126 struct MiscRegLUTEntry &entry; 127 std::bitset<NUM_MISCREG_INFOS> &info; 128 typedef const MiscRegLUTEntryInitializer& chain; 129 public: 130 chain mapsTo(uint32_t l, uint32_t u = 0) const { 131 entry.lower = l; 132 entry.upper = u; 133 return *this; 134 } 135 chain res0(uint64_t mask) const { 136 entry._res0 = mask; 137 return *this; 138 } 139 chain res1(uint64_t mask) const { 140 entry._res1 = mask; 141 return *this; 142 } 143 chain raz(uint64_t mask) const { 144 entry._raz = mask; 145 return *this; 146 } 147 chain rao(uint64_t mask) const { 148 entry._rao = mask; 149 return *this; 150 } 151 chain implemented(bool v = true) const { 152 info[MISCREG_IMPLEMENTED] = v; 153 return *this; 154 } 155 chain unimplemented() const { 156 return implemented(false); 157 } 158 chain unverifiable(bool v = true) const { 159 info[MISCREG_UNVERIFIABLE] = v; 160 return *this; 161 } 162 chain warnNotFail(bool v = true) const { 163 info[MISCREG_WARN_NOT_FAIL] = v; 164 return *this; 165 } 166 chain mutex(bool v = true) const { 167 info[MISCREG_MUTEX] = v; 168 return *this; 169 } 170 chain banked(bool v = true) const { 171 info[MISCREG_BANKED] = v; 172 return *this; 173 } 174 chain bankedChild(bool v = true) const { 175 info[MISCREG_BANKED_CHILD] = v; 176 return *this; 177 } 178 chain userNonSecureRead(bool v = true) const { 179 info[MISCREG_USR_NS_RD] = v; 180 return *this; 181 } 182 chain userNonSecureWrite(bool v = true) const { 183 info[MISCREG_USR_NS_WR] = v; 184 return *this; 185 } 186 chain userSecureRead(bool v = true) const { 187 info[MISCREG_USR_S_RD] = v; 188 return *this; 189 } 190 chain userSecureWrite(bool v = true) const { 191 info[MISCREG_USR_S_WR] = v; 192 return *this; 193 } 194 chain user(bool v = true) const { 195 userNonSecureRead(v); 196 userNonSecureWrite(v); 197 userSecureRead(v); 198 userSecureWrite(v); 199 return *this; 200 } 201 chain privNonSecureRead(bool v = true) const { 202 info[MISCREG_PRI_NS_RD] = v; 203 return *this; 204 } 205 chain privNonSecureWrite(bool v = true) const { 206 info[MISCREG_PRI_NS_WR] = v; 207 return *this; 208 } 209 chain privNonSecure(bool v = true) const { 210 privNonSecureRead(v); 211 privNonSecureWrite(v); 212 return *this; 213 } 214 chain privSecureRead(bool v = true) const { 215 info[MISCREG_PRI_S_RD] = v; 216 return *this; 217 } 218 chain privSecureWrite(bool v = true) const { 219 info[MISCREG_PRI_S_WR] = v; 220 return *this; 221 } 222 chain privSecure(bool v = true) const { 223 privSecureRead(v); 224 privSecureWrite(v); 225 return *this; 226 } 227 chain priv(bool v = true) const { 228 privSecure(v); 229 privNonSecure(v); 230 return *this; 231 } 232 chain hypRead(bool v = true) const { 233 info[MISCREG_HYP_RD] = v; 234 return *this; 235 } 236 chain hypWrite(bool v = true) const { 237 info[MISCREG_HYP_WR] = v; 238 return *this; 239 } 240 chain hyp(bool v = true) const { 241 hypRead(v); 242 hypWrite(v); 243 return *this; 244 } 245 chain monSecureRead(bool v = true) const { 246 info[MISCREG_MON_NS0_RD] = v; 247 return *this; 248 } 249 chain monSecureWrite(bool v = true) const { 250 info[MISCREG_MON_NS0_WR] = v; 251 return *this; 252 } 253 chain monNonSecureRead(bool v = true) const { 254 info[MISCREG_MON_NS1_RD] = v; 255 return *this; 256 } 257 chain monNonSecureWrite(bool v = true) const { 258 info[MISCREG_MON_NS1_WR] = v; 259 return *this; 260 } 261 chain mon(bool v = true) const { 262 monSecureRead(v); 263 monSecureWrite(v); 264 monNonSecureRead(v); 265 monNonSecureWrite(v); 266 return *this; 267 } 268 chain monSecure(bool v = true) const { 269 monSecureRead(v); 270 monSecureWrite(v); 271 return *this; 272 } 273 chain monNonSecure(bool v = true) const { 274 monNonSecureRead(v); 275 monNonSecureWrite(v); 276 return *this; 277 } 278 chain allPrivileges(bool v = true) const { 279 userNonSecureRead(v); 280 userNonSecureWrite(v); 281 userSecureRead(v); 282 userSecureWrite(v); 283 privNonSecureRead(v); 284 privNonSecureWrite(v); 285 privSecureRead(v); 286 privSecureWrite(v); 287 hypRead(v); 288 hypWrite(v); 289 monSecureRead(v); 290 monSecureWrite(v); 291 monNonSecureRead(v); 292 monNonSecureWrite(v); 293 return *this; 294 } 295 chain nonSecure(bool v = true) const { 296 userNonSecureRead(v); 297 userNonSecureWrite(v); 298 privNonSecureRead(v); 299 privNonSecureWrite(v); 300 hypRead(v); 301 hypWrite(v); 302 monNonSecureRead(v); 303 monNonSecureWrite(v); 304 return *this; 305 } 306 chain secure(bool v = true) const { 307 userSecureRead(v); 308 userSecureWrite(v); 309 privSecureRead(v); 310 privSecureWrite(v); 311 monSecureRead(v); 312 monSecureWrite(v); 313 return *this; 314 } 315 chain reads(bool v) const { 316 userNonSecureRead(v); 317 userSecureRead(v); 318 privNonSecureRead(v); 319 privSecureRead(v); 320 hypRead(v); 321 monSecureRead(v); 322 monNonSecureRead(v); 323 return *this; 324 } 325 chain writes(bool v) const { 326 userNonSecureWrite(v); 327 userSecureWrite(v); 328 privNonSecureWrite(v); 329 privSecureWrite(v); 330 hypWrite(v); 331 monSecureWrite(v); 332 monNonSecureWrite(v); 333 return *this; 334 } 335 chain exceptUserMode() const { 336 user(0); 337 return *this; 338 } 339 MiscRegLUTEntryInitializer(struct MiscRegLUTEntry &e, 340 std::bitset<NUM_MISCREG_INFOS> &i) 341 : entry(e), 342 info(i) 343 { 344 // force unimplemented registers to be thusly declared 345 implemented(1); 346 } 347 }; 348 349 const MiscRegLUTEntryInitializer InitReg(uint32_t reg) { 350 return MiscRegLUTEntryInitializer(lookUpMiscReg[reg], 351 miscRegInfo[reg]); 352 } 353 354 void initializeMiscRegMetadata(); 355 356 MiscReg miscRegs[NumMiscRegs]; 357 const IntRegIndex *intRegMap; 358 359 void 360 updateRegMap(CPSR cpsr) 361 { 362 if (cpsr.width == 0) { 363 intRegMap = IntReg64Map; 364 } else { 365 switch (cpsr.mode) { 366 case MODE_USER: 367 case MODE_SYSTEM: 368 intRegMap = IntRegUsrMap; 369 break; 370 case MODE_FIQ: 371 intRegMap = IntRegFiqMap; 372 break; 373 case MODE_IRQ: 374 intRegMap = IntRegIrqMap; 375 break; 376 case MODE_SVC: 377 intRegMap = IntRegSvcMap; 378 break; 379 case MODE_MON: 380 intRegMap = IntRegMonMap; 381 break; 382 case MODE_ABORT: 383 intRegMap = IntRegAbtMap; 384 break; 385 case MODE_HYP: 386 intRegMap = IntRegHypMap; 387 break; 388 case MODE_UNDEFINED: 389 intRegMap = IntRegUndMap; 390 break; 391 default: 392 panic("Unrecognized mode setting in CPSR.\n"); 393 } 394 } 395 } 396 397 BaseISADevice &getGenericTimer(ThreadContext *tc); 398 399 400 private: 401 inline void assert32(ThreadContext *tc) { 402 CPSR cpsr M5_VAR_USED = readMiscReg(MISCREG_CPSR, tc); 403 assert(cpsr.width); 404 } 405 406 inline void assert64(ThreadContext *tc) { 407 CPSR cpsr M5_VAR_USED = readMiscReg(MISCREG_CPSR, tc); 408 assert(!cpsr.width); 409 } 410 411 public: 412 void clear(); 413 414 protected: 415 void clear64(const ArmISAParams *p); 416 void initID32(const ArmISAParams *p); 417 void initID64(const ArmISAParams *p); 418 419 public: 420 MiscReg readMiscRegNoEffect(int misc_reg) const; 421 MiscReg readMiscReg(int misc_reg, ThreadContext *tc); 422 void setMiscRegNoEffect(int misc_reg, const MiscReg &val); 423 void setMiscReg(int misc_reg, const MiscReg &val, ThreadContext *tc); 424 425 RegId 426 flattenRegId(const RegId& regId) const 427 { 428 switch (regId.classValue()) { 429 case IntRegClass: 430 return RegId(IntRegClass, flattenIntIndex(regId.index())); 431 case FloatRegClass: 432 return RegId(FloatRegClass, flattenFloatIndex(regId.index())); 433 case VecRegClass: 434 return RegId(VecRegClass, flattenVecIndex(regId.index())); 435 case VecElemClass: 436 return RegId(VecElemClass, flattenVecElemIndex(regId.index())); 437 case CCRegClass: 438 return RegId(CCRegClass, flattenCCIndex(regId.index())); 439 case MiscRegClass: 440 return RegId(MiscRegClass, flattenMiscIndex(regId.index())); 441 } 442 return RegId(); 443 } 444 445 int 446 flattenIntIndex(int reg) const 447 { 448 assert(reg >= 0); 449 if (reg < NUM_ARCH_INTREGS) { 450 return intRegMap[reg]; 451 } else if (reg < NUM_INTREGS) { 452 return reg; 453 } else if (reg == INTREG_SPX) { 454 CPSR cpsr = miscRegs[MISCREG_CPSR]; 455 ExceptionLevel el = opModeToEL( 456 (OperatingMode) (uint8_t) cpsr.mode); 457 if (!cpsr.sp && el != EL0) 458 return INTREG_SP0; 459 switch (el) { 460 case EL3: 461 return INTREG_SP3; 462 case EL2: 463 return INTREG_SP2; 464 case EL1: 465 return INTREG_SP1; 466 case EL0: 467 return INTREG_SP0; 468 default: 469 panic("Invalid exception level"); 470 return 0; // Never happens. 471 } 472 } else { 473 return flattenIntRegModeIndex(reg); 474 } 475 } 476 477 int 478 flattenFloatIndex(int reg) const 479 { 480 assert(reg >= 0); 481 return reg; 482 } 483 484 int 485 flattenVecIndex(int reg) const 486 { 487 assert(reg >= 0); 488 return reg; 489 } 490 491 int 492 flattenVecElemIndex(int reg) const 493 { 494 assert(reg >= 0); 495 return reg; 496 } 497 498 int 499 flattenCCIndex(int reg) const 500 { 501 assert(reg >= 0); 502 return reg; 503 } 504 505 int 506 flattenMiscIndex(int reg) const 507 { 508 assert(reg >= 0); 509 int flat_idx = reg; 510 511 if (reg == MISCREG_SPSR) { 512 CPSR cpsr = miscRegs[MISCREG_CPSR]; 513 switch (cpsr.mode) { 514 case MODE_EL0T: 515 warn("User mode does not have SPSR\n"); 516 flat_idx = MISCREG_SPSR; 517 break; 518 case MODE_EL1T: 519 case MODE_EL1H: 520 flat_idx = MISCREG_SPSR_EL1; 521 break; 522 case MODE_EL2T: 523 case MODE_EL2H: 524 flat_idx = MISCREG_SPSR_EL2; 525 break; 526 case MODE_EL3T: 527 case MODE_EL3H: 528 flat_idx = MISCREG_SPSR_EL3; 529 break; 530 case MODE_USER: 531 warn("User mode does not have SPSR\n"); 532 flat_idx = MISCREG_SPSR; 533 break; 534 case MODE_FIQ: 535 flat_idx = MISCREG_SPSR_FIQ; 536 break; 537 case MODE_IRQ: 538 flat_idx = MISCREG_SPSR_IRQ; 539 break; 540 case MODE_SVC: 541 flat_idx = MISCREG_SPSR_SVC; 542 break; 543 case MODE_MON: 544 flat_idx = MISCREG_SPSR_MON; 545 break; 546 case MODE_ABORT: 547 flat_idx = MISCREG_SPSR_ABT; 548 break; 549 case MODE_HYP: 550 flat_idx = MISCREG_SPSR_HYP; 551 break; 552 case MODE_UNDEFINED: 553 flat_idx = MISCREG_SPSR_UND; 554 break; 555 default: 556 warn("Trying to access SPSR in an invalid mode: %d\n", 557 cpsr.mode); 558 flat_idx = MISCREG_SPSR; 559 break; 560 } 561 } else if (miscRegInfo[reg][MISCREG_MUTEX]) { 562 // Mutually exclusive CP15 register 563 switch (reg) { 564 case MISCREG_PRRR_MAIR0: 565 case MISCREG_PRRR_MAIR0_NS: 566 case MISCREG_PRRR_MAIR0_S: 567 { 568 TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR); 569 // If the muxed reg has been flattened, work out the 570 // offset and apply it to the unmuxed reg 571 int idxOffset = reg - MISCREG_PRRR_MAIR0; 572 if (ttbcr.eae) 573 flat_idx = flattenMiscIndex(MISCREG_MAIR0 + 574 idxOffset); 575 else 576 flat_idx = flattenMiscIndex(MISCREG_PRRR + 577 idxOffset); 578 } 579 break; 580 case MISCREG_NMRR_MAIR1: 581 case MISCREG_NMRR_MAIR1_NS: 582 case MISCREG_NMRR_MAIR1_S: 583 { 584 TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR); 585 // If the muxed reg has been flattened, work out the 586 // offset and apply it to the unmuxed reg 587 int idxOffset = reg - MISCREG_NMRR_MAIR1; 588 if (ttbcr.eae) 589 flat_idx = flattenMiscIndex(MISCREG_MAIR1 + 590 idxOffset); 591 else 592 flat_idx = flattenMiscIndex(MISCREG_NMRR + 593 idxOffset); 594 } 595 break; 596 case MISCREG_PMXEVTYPER_PMCCFILTR: 597 { 598 PMSELR pmselr = miscRegs[MISCREG_PMSELR]; 599 if (pmselr.sel == 31) 600 flat_idx = flattenMiscIndex(MISCREG_PMCCFILTR); 601 else 602 flat_idx = flattenMiscIndex(MISCREG_PMXEVTYPER); 603 } 604 break; 605 default: 606 panic("Unrecognized misc. register.\n"); 607 break; 608 } 609 } else { 610 if (miscRegInfo[reg][MISCREG_BANKED]) { 611 bool secureReg = haveSecurity && !highestELIs64 && 612 inSecureState(miscRegs[MISCREG_SCR], 613 miscRegs[MISCREG_CPSR]); 614 flat_idx += secureReg ? 2 : 1; 615 } 616 } 617 return flat_idx; 618 } 619 620 std::pair<int,int> getMiscIndices(int misc_reg) const 621 { 622 // Note: indexes of AArch64 registers are left unchanged 623 int flat_idx = flattenMiscIndex(misc_reg); 624 625 if (lookUpMiscReg[flat_idx].lower == 0) { 626 return std::make_pair(flat_idx, 0); 627 } 628 629 // do additional S/NS flattenings if mapped to NS while in S 630 bool S = haveSecurity && !highestELIs64 && 631 inSecureState(miscRegs[MISCREG_SCR], 632 miscRegs[MISCREG_CPSR]); 633 int lower = lookUpMiscReg[flat_idx].lower; 634 int upper = lookUpMiscReg[flat_idx].upper; 635 // upper == 0, which is CPSR, is not MISCREG_BANKED_CHILD (no-op) 636 lower += S && miscRegInfo[lower][MISCREG_BANKED_CHILD]; 637 upper += S && miscRegInfo[upper][MISCREG_BANKED_CHILD]; 638 return std::make_pair(lower, upper); 639 } 640 641 void serialize(CheckpointOut &cp) const 642 { 643 DPRINTF(Checkpoint, "Serializing Arm Misc Registers\n"); 644 SERIALIZE_ARRAY(miscRegs, NUM_PHYS_MISCREGS); 645 646 SERIALIZE_SCALAR(highestELIs64); 647 SERIALIZE_SCALAR(haveSecurity); 648 SERIALIZE_SCALAR(haveLPAE); 649 SERIALIZE_SCALAR(haveVirtualization); 650 SERIALIZE_SCALAR(haveLargeAsid64); 651 SERIALIZE_SCALAR(physAddrRange); 652 } 653 void unserialize(CheckpointIn &cp) 654 { 655 DPRINTF(Checkpoint, "Unserializing Arm Misc Registers\n"); 656 UNSERIALIZE_ARRAY(miscRegs, NUM_PHYS_MISCREGS); 657 CPSR tmp_cpsr = miscRegs[MISCREG_CPSR]; 658 updateRegMap(tmp_cpsr); 659 660 UNSERIALIZE_SCALAR(highestELIs64); 661 UNSERIALIZE_SCALAR(haveSecurity); 662 UNSERIALIZE_SCALAR(haveLPAE); 663 UNSERIALIZE_SCALAR(haveVirtualization); 664 UNSERIALIZE_SCALAR(haveLargeAsid64); 665 UNSERIALIZE_SCALAR(physAddrRange); 666 } 667 668 void startup(ThreadContext *tc); 669 670 Enums::DecoderFlavour decoderFlavour() const { return _decoderFlavour; } 671 672 Enums::VecRegRenameMode 673 vecRegRenameMode() const 674 { 675 return _vecRegRenameMode; 676 } 677 678 /// Explicitly import the otherwise hidden startup 679 using SimObject::startup; 680 681 typedef ArmISAParams Params; 682 683 const Params *params() const; 684 685 ISA(Params *p); 686 }; 687} 688 689template<> 690struct initRenameMode<ArmISA::ISA> 691{ 692 static Enums::VecRegRenameMode mode(const ArmISA::ISA* isa) 693 { 694 return isa->vecRegRenameMode(); 695 } 696 static bool equals(const ArmISA::ISA* isa1, const ArmISA::ISA* isa2) 697 { 698 return mode(isa1) == mode(isa2); 699 } 700}; 701 702#endif
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