isa.cc revision 12666
1/* 2 * Copyright (c) 2010-2017 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 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions are 16 * met: redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer; 18 * redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution; 21 * neither the name of the copyright holders nor the names of its 22 * contributors may be used to endorse or promote products derived from 23 * this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * Authors: Gabe Black 38 * Ali Saidi 39 */ 40 41#include "arch/arm/isa.hh" 42#include "arch/arm/pmu.hh" 43#include "arch/arm/system.hh" 44#include "arch/arm/tlb.hh" 45#include "arch/arm/tlbi_op.hh" 46#include "cpu/base.hh" 47#include "cpu/checker/cpu.hh" 48#include "debug/Arm.hh" 49#include "debug/MiscRegs.hh" 50#include "dev/arm/generic_timer.hh" 51#include "params/ArmISA.hh" 52#include "sim/faults.hh" 53#include "sim/stat_control.hh" 54#include "sim/system.hh" 55 56namespace ArmISA 57{ 58 59ISA::ISA(Params *p) 60 : SimObject(p), 61 system(NULL), 62 _decoderFlavour(p->decoderFlavour), 63 _vecRegRenameMode(p->vecRegRenameMode), 64 pmu(p->pmu) 65{ 66 miscRegs[MISCREG_SCTLR_RST] = 0; 67 68 // Hook up a dummy device if we haven't been configured with a 69 // real PMU. By using a dummy device, we don't need to check that 70 // the PMU exist every time we try to access a PMU register. 71 if (!pmu) 72 pmu = &dummyDevice; 73 74 // Give all ISA devices a pointer to this ISA 75 pmu->setISA(this); 76 77 system = dynamic_cast<ArmSystem *>(p->system); 78 79 // Cache system-level properties 80 if (FullSystem && system) { 81 highestELIs64 = system->highestELIs64(); 82 haveSecurity = system->haveSecurity(); 83 haveLPAE = system->haveLPAE(); 84 haveVirtualization = system->haveVirtualization(); 85 haveLargeAsid64 = system->haveLargeAsid64(); 86 physAddrRange64 = system->physAddrRange64(); 87 } else { 88 highestELIs64 = true; // ArmSystem::highestELIs64 does the same 89 haveSecurity = haveLPAE = haveVirtualization = false; 90 haveLargeAsid64 = false; 91 physAddrRange64 = 32; // dummy value 92 } 93 94 initializeMiscRegMetadata(); 95 preUnflattenMiscReg(); 96 97 clear(); 98} 99 100std::vector<struct ISA::MiscRegLUTEntry> ISA::lookUpMiscReg(NUM_MISCREGS); 101 102const ArmISAParams * 103ISA::params() const 104{ 105 return dynamic_cast<const Params *>(_params); 106} 107 108void 109ISA::clear() 110{ 111 const Params *p(params()); 112 113 SCTLR sctlr_rst = miscRegs[MISCREG_SCTLR_RST]; 114 memset(miscRegs, 0, sizeof(miscRegs)); 115 116 // Initialize configurable default values 117 miscRegs[MISCREG_MIDR] = p->midr; 118 miscRegs[MISCREG_MIDR_EL1] = p->midr; 119 miscRegs[MISCREG_VPIDR] = p->midr; 120 121 if (FullSystem && system->highestELIs64()) { 122 // Initialize AArch64 state 123 clear64(p); 124 return; 125 } 126 127 // Initialize AArch32 state... 128 129 CPSR cpsr = 0; 130 cpsr.mode = MODE_USER; 131 miscRegs[MISCREG_CPSR] = cpsr; 132 updateRegMap(cpsr); 133 134 SCTLR sctlr = 0; 135 sctlr.te = (bool) sctlr_rst.te; 136 sctlr.nmfi = (bool) sctlr_rst.nmfi; 137 sctlr.v = (bool) sctlr_rst.v; 138 sctlr.u = 1; 139 sctlr.xp = 1; 140 sctlr.rao2 = 1; 141 sctlr.rao3 = 1; 142 sctlr.rao4 = 0xf; // SCTLR[6:3] 143 sctlr.uci = 1; 144 sctlr.dze = 1; 145 miscRegs[MISCREG_SCTLR_NS] = sctlr; 146 miscRegs[MISCREG_SCTLR_RST] = sctlr_rst; 147 miscRegs[MISCREG_HCPTR] = 0; 148 149 // Start with an event in the mailbox 150 miscRegs[MISCREG_SEV_MAILBOX] = 1; 151 152 // Separate Instruction and Data TLBs 153 miscRegs[MISCREG_TLBTR] = 1; 154 155 MVFR0 mvfr0 = 0; 156 mvfr0.advSimdRegisters = 2; 157 mvfr0.singlePrecision = 2; 158 mvfr0.doublePrecision = 2; 159 mvfr0.vfpExceptionTrapping = 0; 160 mvfr0.divide = 1; 161 mvfr0.squareRoot = 1; 162 mvfr0.shortVectors = 1; 163 mvfr0.roundingModes = 1; 164 miscRegs[MISCREG_MVFR0] = mvfr0; 165 166 MVFR1 mvfr1 = 0; 167 mvfr1.flushToZero = 1; 168 mvfr1.defaultNaN = 1; 169 mvfr1.advSimdLoadStore = 1; 170 mvfr1.advSimdInteger = 1; 171 mvfr1.advSimdSinglePrecision = 1; 172 mvfr1.advSimdHalfPrecision = 1; 173 mvfr1.vfpHalfPrecision = 1; 174 miscRegs[MISCREG_MVFR1] = mvfr1; 175 176 // Reset values of PRRR and NMRR are implementation dependent 177 178 // @todo: PRRR and NMRR in secure state? 179 miscRegs[MISCREG_PRRR_NS] = 180 (1 << 19) | // 19 181 (0 << 18) | // 18 182 (0 << 17) | // 17 183 (1 << 16) | // 16 184 (2 << 14) | // 15:14 185 (0 << 12) | // 13:12 186 (2 << 10) | // 11:10 187 (2 << 8) | // 9:8 188 (2 << 6) | // 7:6 189 (2 << 4) | // 5:4 190 (1 << 2) | // 3:2 191 0; // 1:0 192 miscRegs[MISCREG_NMRR_NS] = 193 (1 << 30) | // 31:30 194 (0 << 26) | // 27:26 195 (0 << 24) | // 25:24 196 (3 << 22) | // 23:22 197 (2 << 20) | // 21:20 198 (0 << 18) | // 19:18 199 (0 << 16) | // 17:16 200 (1 << 14) | // 15:14 201 (0 << 12) | // 13:12 202 (2 << 10) | // 11:10 203 (0 << 8) | // 9:8 204 (3 << 6) | // 7:6 205 (2 << 4) | // 5:4 206 (0 << 2) | // 3:2 207 0; // 1:0 208 209 miscRegs[MISCREG_CPACR] = 0; 210 211 miscRegs[MISCREG_ID_MMFR0] = p->id_mmfr0; 212 miscRegs[MISCREG_ID_MMFR1] = p->id_mmfr1; 213 miscRegs[MISCREG_ID_MMFR2] = p->id_mmfr2; 214 miscRegs[MISCREG_ID_MMFR3] = p->id_mmfr3; 215 216 miscRegs[MISCREG_ID_ISAR0] = p->id_isar0; 217 miscRegs[MISCREG_ID_ISAR1] = p->id_isar1; 218 miscRegs[MISCREG_ID_ISAR2] = p->id_isar2; 219 miscRegs[MISCREG_ID_ISAR3] = p->id_isar3; 220 miscRegs[MISCREG_ID_ISAR4] = p->id_isar4; 221 miscRegs[MISCREG_ID_ISAR5] = p->id_isar5; 222 223 miscRegs[MISCREG_FPSID] = p->fpsid; 224 225 if (haveLPAE) { 226 TTBCR ttbcr = miscRegs[MISCREG_TTBCR_NS]; 227 ttbcr.eae = 0; 228 miscRegs[MISCREG_TTBCR_NS] = ttbcr; 229 // Enforce consistency with system-level settings 230 miscRegs[MISCREG_ID_MMFR0] = (miscRegs[MISCREG_ID_MMFR0] & ~0xf) | 0x5; 231 } 232 233 if (haveSecurity) { 234 miscRegs[MISCREG_SCTLR_S] = sctlr; 235 miscRegs[MISCREG_SCR] = 0; 236 miscRegs[MISCREG_VBAR_S] = 0; 237 } else { 238 // we're always non-secure 239 miscRegs[MISCREG_SCR] = 1; 240 } 241 242 //XXX We need to initialize the rest of the state. 243} 244 245void 246ISA::clear64(const ArmISAParams *p) 247{ 248 CPSR cpsr = 0; 249 Addr rvbar = system->resetAddr64(); 250 switch (system->highestEL()) { 251 // Set initial EL to highest implemented EL using associated stack 252 // pointer (SP_ELx); set RVBAR_ELx to implementation defined reset 253 // value 254 case EL3: 255 cpsr.mode = MODE_EL3H; 256 miscRegs[MISCREG_RVBAR_EL3] = rvbar; 257 break; 258 case EL2: 259 cpsr.mode = MODE_EL2H; 260 miscRegs[MISCREG_RVBAR_EL2] = rvbar; 261 break; 262 case EL1: 263 cpsr.mode = MODE_EL1H; 264 miscRegs[MISCREG_RVBAR_EL1] = rvbar; 265 break; 266 default: 267 panic("Invalid highest implemented exception level"); 268 break; 269 } 270 271 // Initialize rest of CPSR 272 cpsr.daif = 0xf; // Mask all interrupts 273 cpsr.ss = 0; 274 cpsr.il = 0; 275 miscRegs[MISCREG_CPSR] = cpsr; 276 updateRegMap(cpsr); 277 278 // Initialize other control registers 279 miscRegs[MISCREG_MPIDR_EL1] = 0x80000000; 280 if (haveSecurity) { 281 miscRegs[MISCREG_SCTLR_EL3] = 0x30c50830; 282 miscRegs[MISCREG_SCR_EL3] = 0x00000030; // RES1 fields 283 } else if (haveVirtualization) { 284 // also MISCREG_SCTLR_EL2 (by mapping) 285 miscRegs[MISCREG_HSCTLR] = 0x30c50830; 286 } else { 287 // also MISCREG_SCTLR_EL1 (by mapping) 288 miscRegs[MISCREG_SCTLR_NS] = 0x30d00800 | 0x00050030; // RES1 | init 289 // Always non-secure 290 miscRegs[MISCREG_SCR_EL3] = 1; 291 } 292 293 // Initialize configurable id registers 294 miscRegs[MISCREG_ID_AA64AFR0_EL1] = p->id_aa64afr0_el1; 295 miscRegs[MISCREG_ID_AA64AFR1_EL1] = p->id_aa64afr1_el1; 296 miscRegs[MISCREG_ID_AA64DFR0_EL1] = 297 (p->id_aa64dfr0_el1 & 0xfffffffffffff0ffULL) | 298 (p->pmu ? 0x0000000000000100ULL : 0); // Enable PMUv3 299 300 miscRegs[MISCREG_ID_AA64DFR1_EL1] = p->id_aa64dfr1_el1; 301 miscRegs[MISCREG_ID_AA64ISAR0_EL1] = p->id_aa64isar0_el1; 302 miscRegs[MISCREG_ID_AA64ISAR1_EL1] = p->id_aa64isar1_el1; 303 miscRegs[MISCREG_ID_AA64MMFR0_EL1] = p->id_aa64mmfr0_el1; 304 miscRegs[MISCREG_ID_AA64MMFR1_EL1] = p->id_aa64mmfr1_el1; 305 306 miscRegs[MISCREG_ID_DFR0_EL1] = 307 (p->pmu ? 0x03000000ULL : 0); // Enable PMUv3 308 309 miscRegs[MISCREG_ID_DFR0] = miscRegs[MISCREG_ID_DFR0_EL1]; 310 311 // Enforce consistency with system-level settings... 312 313 // EL3 314 miscRegs[MISCREG_ID_AA64PFR0_EL1] = insertBits( 315 miscRegs[MISCREG_ID_AA64PFR0_EL1], 15, 12, 316 haveSecurity ? 0x2 : 0x0); 317 // EL2 318 miscRegs[MISCREG_ID_AA64PFR0_EL1] = insertBits( 319 miscRegs[MISCREG_ID_AA64PFR0_EL1], 11, 8, 320 haveVirtualization ? 0x2 : 0x0); 321 // Large ASID support 322 miscRegs[MISCREG_ID_AA64MMFR0_EL1] = insertBits( 323 miscRegs[MISCREG_ID_AA64MMFR0_EL1], 7, 4, 324 haveLargeAsid64 ? 0x2 : 0x0); 325 // Physical address size 326 miscRegs[MISCREG_ID_AA64MMFR0_EL1] = insertBits( 327 miscRegs[MISCREG_ID_AA64MMFR0_EL1], 3, 0, 328 encodePhysAddrRange64(physAddrRange64)); 329} 330 331MiscReg 332ISA::readMiscRegNoEffect(int misc_reg) const 333{ 334 assert(misc_reg < NumMiscRegs); 335 336 const auto ® = lookUpMiscReg[misc_reg]; // bit masks 337 const auto &map = getMiscIndices(misc_reg); 338 int lower = map.first, upper = map.second; 339 // NB!: apply architectural masks according to desired register, 340 // despite possibly getting value from different (mapped) register. 341 auto val = !upper ? miscRegs[lower] : ((miscRegs[lower] & mask(32)) 342 |(miscRegs[upper] << 32)); 343 if (val & reg.res0()) { 344 DPRINTF(MiscRegs, "Reading MiscReg %s with set res0 bits: %#x\n", 345 miscRegName[misc_reg], val & reg.res0()); 346 } 347 if ((val & reg.res1()) != reg.res1()) { 348 DPRINTF(MiscRegs, "Reading MiscReg %s with clear res1 bits: %#x\n", 349 miscRegName[misc_reg], (val & reg.res1()) ^ reg.res1()); 350 } 351 return (val & ~reg.raz()) | reg.rao(); // enforce raz/rao 352} 353 354 355MiscReg 356ISA::readMiscReg(int misc_reg, ThreadContext *tc) 357{ 358 CPSR cpsr = 0; 359 PCState pc = 0; 360 SCR scr = 0; 361 362 if (misc_reg == MISCREG_CPSR) { 363 cpsr = miscRegs[misc_reg]; 364 pc = tc->pcState(); 365 cpsr.j = pc.jazelle() ? 1 : 0; 366 cpsr.t = pc.thumb() ? 1 : 0; 367 return cpsr; 368 } 369 370#ifndef NDEBUG 371 if (!miscRegInfo[misc_reg][MISCREG_IMPLEMENTED]) { 372 if (miscRegInfo[misc_reg][MISCREG_WARN_NOT_FAIL]) 373 warn("Unimplemented system register %s read.\n", 374 miscRegName[misc_reg]); 375 else 376 panic("Unimplemented system register %s read.\n", 377 miscRegName[misc_reg]); 378 } 379#endif 380 381 switch (unflattenMiscReg(misc_reg)) { 382 case MISCREG_HCR: 383 { 384 if (!haveVirtualization) 385 return 0; 386 else 387 return readMiscRegNoEffect(MISCREG_HCR); 388 } 389 case MISCREG_CPACR: 390 { 391 const uint32_t ones = (uint32_t)(-1); 392 CPACR cpacrMask = 0; 393 // Only cp10, cp11, and ase are implemented, nothing else should 394 // be readable? (straight copy from the write code) 395 cpacrMask.cp10 = ones; 396 cpacrMask.cp11 = ones; 397 cpacrMask.asedis = ones; 398 399 // Security Extensions may limit the readability of CPACR 400 if (haveSecurity) { 401 scr = readMiscRegNoEffect(MISCREG_SCR); 402 cpsr = readMiscRegNoEffect(MISCREG_CPSR); 403 if (scr.ns && (cpsr.mode != MODE_MON)) { 404 NSACR nsacr = readMiscRegNoEffect(MISCREG_NSACR); 405 // NB: Skipping the full loop, here 406 if (!nsacr.cp10) cpacrMask.cp10 = 0; 407 if (!nsacr.cp11) cpacrMask.cp11 = 0; 408 } 409 } 410 MiscReg val = readMiscRegNoEffect(MISCREG_CPACR); 411 val &= cpacrMask; 412 DPRINTF(MiscRegs, "Reading misc reg %s: %#x\n", 413 miscRegName[misc_reg], val); 414 return val; 415 } 416 case MISCREG_MPIDR: 417 cpsr = readMiscRegNoEffect(MISCREG_CPSR); 418 scr = readMiscRegNoEffect(MISCREG_SCR); 419 if ((cpsr.mode == MODE_HYP) || inSecureState(scr, cpsr)) { 420 return getMPIDR(system, tc); 421 } else { 422 return readMiscReg(MISCREG_VMPIDR, tc); 423 } 424 break; 425 case MISCREG_MPIDR_EL1: 426 // @todo in the absence of v8 virtualization support just return MPIDR_EL1 427 return getMPIDR(system, tc) & 0xffffffff; 428 case MISCREG_VMPIDR: 429 // top bit defined as RES1 430 return readMiscRegNoEffect(misc_reg) | 0x80000000; 431 case MISCREG_ID_AFR0: // not implemented, so alias MIDR 432 case MISCREG_REVIDR: // not implemented, so alias MIDR 433 case MISCREG_MIDR: 434 cpsr = readMiscRegNoEffect(MISCREG_CPSR); 435 scr = readMiscRegNoEffect(MISCREG_SCR); 436 if ((cpsr.mode == MODE_HYP) || inSecureState(scr, cpsr)) { 437 return readMiscRegNoEffect(misc_reg); 438 } else { 439 return readMiscRegNoEffect(MISCREG_VPIDR); 440 } 441 break; 442 case MISCREG_JOSCR: // Jazelle trivial implementation, RAZ/WI 443 case MISCREG_JMCR: // Jazelle trivial implementation, RAZ/WI 444 case MISCREG_JIDR: // Jazelle trivial implementation, RAZ/WI 445 case MISCREG_AIDR: // AUX ID set to 0 446 case MISCREG_TCMTR: // No TCM's 447 return 0; 448 449 case MISCREG_CLIDR: 450 warn_once("The clidr register always reports 0 caches.\n"); 451 warn_once("clidr LoUIS field of 0b001 to match current " 452 "ARM implementations.\n"); 453 return 0x00200000; 454 case MISCREG_CCSIDR: 455 warn_once("The ccsidr register isn't implemented and " 456 "always reads as 0.\n"); 457 break; 458 case MISCREG_CTR: // AArch32, ARMv7, top bit set 459 case MISCREG_CTR_EL0: // AArch64 460 { 461 //all caches have the same line size in gem5 462 //4 byte words in ARM 463 unsigned lineSizeWords = 464 tc->getSystemPtr()->cacheLineSize() / 4; 465 unsigned log2LineSizeWords = 0; 466 467 while (lineSizeWords >>= 1) { 468 ++log2LineSizeWords; 469 } 470 471 CTR ctr = 0; 472 //log2 of minimun i-cache line size (words) 473 ctr.iCacheLineSize = log2LineSizeWords; 474 //b11 - gem5 uses pipt 475 ctr.l1IndexPolicy = 0x3; 476 //log2 of minimum d-cache line size (words) 477 ctr.dCacheLineSize = log2LineSizeWords; 478 //log2 of max reservation size (words) 479 ctr.erg = log2LineSizeWords; 480 //log2 of max writeback size (words) 481 ctr.cwg = log2LineSizeWords; 482 //b100 - gem5 format is ARMv7 483 ctr.format = 0x4; 484 485 return ctr; 486 } 487 case MISCREG_ACTLR: 488 warn("Not doing anything for miscreg ACTLR\n"); 489 break; 490 491 case MISCREG_PMXEVTYPER_PMCCFILTR: 492 case MISCREG_PMINTENSET_EL1 ... MISCREG_PMOVSSET_EL0: 493 case MISCREG_PMEVCNTR0_EL0 ... MISCREG_PMEVTYPER5_EL0: 494 case MISCREG_PMCR ... MISCREG_PMOVSSET: 495 return pmu->readMiscReg(misc_reg); 496 497 case MISCREG_CPSR_Q: 498 panic("shouldn't be reading this register seperately\n"); 499 case MISCREG_FPSCR_QC: 500 return readMiscRegNoEffect(MISCREG_FPSCR) & ~FpscrQcMask; 501 case MISCREG_FPSCR_EXC: 502 return readMiscRegNoEffect(MISCREG_FPSCR) & ~FpscrExcMask; 503 case MISCREG_FPSR: 504 { 505 const uint32_t ones = (uint32_t)(-1); 506 FPSCR fpscrMask = 0; 507 fpscrMask.ioc = ones; 508 fpscrMask.dzc = ones; 509 fpscrMask.ofc = ones; 510 fpscrMask.ufc = ones; 511 fpscrMask.ixc = ones; 512 fpscrMask.idc = ones; 513 fpscrMask.qc = ones; 514 fpscrMask.v = ones; 515 fpscrMask.c = ones; 516 fpscrMask.z = ones; 517 fpscrMask.n = ones; 518 return readMiscRegNoEffect(MISCREG_FPSCR) & (uint32_t)fpscrMask; 519 } 520 case MISCREG_FPCR: 521 { 522 const uint32_t ones = (uint32_t)(-1); 523 FPSCR fpscrMask = 0; 524 fpscrMask.ioe = ones; 525 fpscrMask.dze = ones; 526 fpscrMask.ofe = ones; 527 fpscrMask.ufe = ones; 528 fpscrMask.ixe = ones; 529 fpscrMask.ide = ones; 530 fpscrMask.len = ones; 531 fpscrMask.stride = ones; 532 fpscrMask.rMode = ones; 533 fpscrMask.fz = ones; 534 fpscrMask.dn = ones; 535 fpscrMask.ahp = ones; 536 return readMiscRegNoEffect(MISCREG_FPSCR) & (uint32_t)fpscrMask; 537 } 538 case MISCREG_NZCV: 539 { 540 CPSR cpsr = 0; 541 cpsr.nz = tc->readCCReg(CCREG_NZ); 542 cpsr.c = tc->readCCReg(CCREG_C); 543 cpsr.v = tc->readCCReg(CCREG_V); 544 return cpsr; 545 } 546 case MISCREG_DAIF: 547 { 548 CPSR cpsr = 0; 549 cpsr.daif = (uint8_t) ((CPSR) miscRegs[MISCREG_CPSR]).daif; 550 return cpsr; 551 } 552 case MISCREG_SP_EL0: 553 { 554 return tc->readIntReg(INTREG_SP0); 555 } 556 case MISCREG_SP_EL1: 557 { 558 return tc->readIntReg(INTREG_SP1); 559 } 560 case MISCREG_SP_EL2: 561 { 562 return tc->readIntReg(INTREG_SP2); 563 } 564 case MISCREG_SPSEL: 565 { 566 return miscRegs[MISCREG_CPSR] & 0x1; 567 } 568 case MISCREG_CURRENTEL: 569 { 570 return miscRegs[MISCREG_CPSR] & 0xc; 571 } 572 case MISCREG_L2CTLR: 573 { 574 // mostly unimplemented, just set NumCPUs field from sim and return 575 L2CTLR l2ctlr = 0; 576 // b00:1CPU to b11:4CPUs 577 l2ctlr.numCPUs = tc->getSystemPtr()->numContexts() - 1; 578 return l2ctlr; 579 } 580 case MISCREG_DBGDIDR: 581 /* For now just implement the version number. 582 * ARMv7, v7.1 Debug architecture (0b0101 --> 0x5) 583 */ 584 return 0x5 << 16; 585 case MISCREG_DBGDSCRint: 586 return 0; 587 case MISCREG_ISR: 588 return tc->getCpuPtr()->getInterruptController(tc->threadId())->getISR( 589 readMiscRegNoEffect(MISCREG_HCR), 590 readMiscRegNoEffect(MISCREG_CPSR), 591 readMiscRegNoEffect(MISCREG_SCR)); 592 case MISCREG_ISR_EL1: 593 return tc->getCpuPtr()->getInterruptController(tc->threadId())->getISR( 594 readMiscRegNoEffect(MISCREG_HCR_EL2), 595 readMiscRegNoEffect(MISCREG_CPSR), 596 readMiscRegNoEffect(MISCREG_SCR_EL3)); 597 case MISCREG_DCZID_EL0: 598 return 0x04; // DC ZVA clear 64-byte chunks 599 case MISCREG_HCPTR: 600 { 601 MiscReg val = readMiscRegNoEffect(misc_reg); 602 // The trap bit associated with CP14 is defined as RAZ 603 val &= ~(1 << 14); 604 // If a CP bit in NSACR is 0 then the corresponding bit in 605 // HCPTR is RAO/WI 606 bool secure_lookup = haveSecurity && 607 inSecureState(readMiscRegNoEffect(MISCREG_SCR), 608 readMiscRegNoEffect(MISCREG_CPSR)); 609 if (!secure_lookup) { 610 MiscReg mask = readMiscRegNoEffect(MISCREG_NSACR); 611 val |= (mask ^ 0x7FFF) & 0xBFFF; 612 } 613 // Set the bits for unimplemented coprocessors to RAO/WI 614 val |= 0x33FF; 615 return (val); 616 } 617 case MISCREG_HDFAR: // alias for secure DFAR 618 return readMiscRegNoEffect(MISCREG_DFAR_S); 619 case MISCREG_HIFAR: // alias for secure IFAR 620 return readMiscRegNoEffect(MISCREG_IFAR_S); 621 case MISCREG_HVBAR: // bottom bits reserved 622 return readMiscRegNoEffect(MISCREG_HVBAR) & 0xFFFFFFE0; 623 case MISCREG_SCTLR: 624 return (readMiscRegNoEffect(misc_reg) & 0x72DD39FF) | 0x00C00818; 625 case MISCREG_SCTLR_EL1: 626 return (readMiscRegNoEffect(misc_reg) & 0x37DDDBBF) | 0x30D00800; 627 case MISCREG_SCTLR_EL2: 628 case MISCREG_SCTLR_EL3: 629 case MISCREG_HSCTLR: 630 return (readMiscRegNoEffect(misc_reg) & 0x32CD183F) | 0x30C50830; 631 632 case MISCREG_ID_PFR0: 633 // !ThumbEE | !Jazelle | Thumb | ARM 634 return 0x00000031; 635 case MISCREG_ID_PFR1: 636 { // Timer | Virti | !M Profile | TrustZone | ARMv4 637 bool haveTimer = (system->getGenericTimer() != NULL); 638 return 0x00000001 639 | (haveSecurity ? 0x00000010 : 0x0) 640 | (haveVirtualization ? 0x00001000 : 0x0) 641 | (haveTimer ? 0x00010000 : 0x0); 642 } 643 case MISCREG_ID_AA64PFR0_EL1: 644 return 0x0000000000000002 // AArch{64,32} supported at EL0 645 | 0x0000000000000020 // EL1 646 | (haveVirtualization ? 0x0000000000000200 : 0) // EL2 647 | (haveSecurity ? 0x0000000000002000 : 0); // EL3 648 case MISCREG_ID_AA64PFR1_EL1: 649 return 0; // bits [63:0] RES0 (reserved for future use) 650 651 // Generic Timer registers 652 case MISCREG_CNTFRQ ... MISCREG_CNTHP_CTL: 653 case MISCREG_CNTPCT ... MISCREG_CNTHP_CVAL: 654 case MISCREG_CNTKCTL_EL1 ... MISCREG_CNTV_CVAL_EL0: 655 case MISCREG_CNTVOFF_EL2 ... MISCREG_CNTPS_CVAL_EL1: 656 return getGenericTimer(tc).readMiscReg(misc_reg); 657 658 default: 659 break; 660 661 } 662 return readMiscRegNoEffect(misc_reg); 663} 664 665void 666ISA::setMiscRegNoEffect(int misc_reg, const MiscReg &val) 667{ 668 assert(misc_reg < NumMiscRegs); 669 670 const auto ® = lookUpMiscReg[misc_reg]; // bit masks 671 const auto &map = getMiscIndices(misc_reg); 672 int lower = map.first, upper = map.second; 673 674 auto v = (val & ~reg.wi()) | reg.rao(); 675 if (upper > 0) { 676 miscRegs[lower] = bits(v, 31, 0); 677 miscRegs[upper] = bits(v, 63, 32); 678 DPRINTF(MiscRegs, "Writing to misc reg %d (%d:%d) : %#x\n", 679 misc_reg, lower, upper, v); 680 } else { 681 miscRegs[lower] = v; 682 DPRINTF(MiscRegs, "Writing to misc reg %d (%d) : %#x\n", 683 misc_reg, lower, v); 684 } 685} 686 687void 688ISA::setMiscReg(int misc_reg, const MiscReg &val, ThreadContext *tc) 689{ 690 691 MiscReg newVal = val; 692 bool secure_lookup; 693 SCR scr; 694 695 if (misc_reg == MISCREG_CPSR) { 696 updateRegMap(val); 697 698 699 CPSR old_cpsr = miscRegs[MISCREG_CPSR]; 700 int old_mode = old_cpsr.mode; 701 CPSR cpsr = val; 702 if (old_mode != cpsr.mode || cpsr.il != old_cpsr.il) { 703 getITBPtr(tc)->invalidateMiscReg(); 704 getDTBPtr(tc)->invalidateMiscReg(); 705 } 706 707 DPRINTF(Arm, "Updating CPSR from %#x to %#x f:%d i:%d a:%d mode:%#x\n", 708 miscRegs[misc_reg], cpsr, cpsr.f, cpsr.i, cpsr.a, cpsr.mode); 709 PCState pc = tc->pcState(); 710 pc.nextThumb(cpsr.t); 711 pc.nextJazelle(cpsr.j); 712 713 // Follow slightly different semantics if a CheckerCPU object 714 // is connected 715 CheckerCPU *checker = tc->getCheckerCpuPtr(); 716 if (checker) { 717 tc->pcStateNoRecord(pc); 718 } else { 719 tc->pcState(pc); 720 } 721 } else { 722#ifndef NDEBUG 723 if (!miscRegInfo[misc_reg][MISCREG_IMPLEMENTED]) { 724 if (miscRegInfo[misc_reg][MISCREG_WARN_NOT_FAIL]) 725 warn("Unimplemented system register %s write with %#x.\n", 726 miscRegName[misc_reg], val); 727 else 728 panic("Unimplemented system register %s write with %#x.\n", 729 miscRegName[misc_reg], val); 730 } 731#endif 732 switch (unflattenMiscReg(misc_reg)) { 733 case MISCREG_CPACR: 734 { 735 736 const uint32_t ones = (uint32_t)(-1); 737 CPACR cpacrMask = 0; 738 // Only cp10, cp11, and ase are implemented, nothing else should 739 // be writable 740 cpacrMask.cp10 = ones; 741 cpacrMask.cp11 = ones; 742 cpacrMask.asedis = ones; 743 744 // Security Extensions may limit the writability of CPACR 745 if (haveSecurity) { 746 scr = readMiscRegNoEffect(MISCREG_SCR); 747 CPSR cpsr = readMiscRegNoEffect(MISCREG_CPSR); 748 if (scr.ns && (cpsr.mode != MODE_MON)) { 749 NSACR nsacr = readMiscRegNoEffect(MISCREG_NSACR); 750 // NB: Skipping the full loop, here 751 if (!nsacr.cp10) cpacrMask.cp10 = 0; 752 if (!nsacr.cp11) cpacrMask.cp11 = 0; 753 } 754 } 755 756 MiscReg old_val = readMiscRegNoEffect(MISCREG_CPACR); 757 newVal &= cpacrMask; 758 newVal |= old_val & ~cpacrMask; 759 DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n", 760 miscRegName[misc_reg], newVal); 761 } 762 break; 763 case MISCREG_CPACR_EL1: 764 { 765 const uint32_t ones = (uint32_t)(-1); 766 CPACR cpacrMask = 0; 767 cpacrMask.tta = ones; 768 cpacrMask.fpen = ones; 769 newVal &= cpacrMask; 770 DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n", 771 miscRegName[misc_reg], newVal); 772 } 773 break; 774 case MISCREG_CPTR_EL2: 775 { 776 const uint32_t ones = (uint32_t)(-1); 777 CPTR cptrMask = 0; 778 cptrMask.tcpac = ones; 779 cptrMask.tta = ones; 780 cptrMask.tfp = ones; 781 newVal &= cptrMask; 782 cptrMask = 0; 783 cptrMask.res1_13_12_el2 = ones; 784 cptrMask.res1_9_0_el2 = ones; 785 newVal |= cptrMask; 786 DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n", 787 miscRegName[misc_reg], newVal); 788 } 789 break; 790 case MISCREG_CPTR_EL3: 791 { 792 const uint32_t ones = (uint32_t)(-1); 793 CPTR cptrMask = 0; 794 cptrMask.tcpac = ones; 795 cptrMask.tta = ones; 796 cptrMask.tfp = ones; 797 newVal &= cptrMask; 798 DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n", 799 miscRegName[misc_reg], newVal); 800 } 801 break; 802 case MISCREG_CSSELR: 803 warn_once("The csselr register isn't implemented.\n"); 804 return; 805 806 case MISCREG_DC_ZVA_Xt: 807 warn("Calling DC ZVA! Not Implemeted! Expect WEIRD results\n"); 808 return; 809 810 case MISCREG_FPSCR: 811 { 812 const uint32_t ones = (uint32_t)(-1); 813 FPSCR fpscrMask = 0; 814 fpscrMask.ioc = ones; 815 fpscrMask.dzc = ones; 816 fpscrMask.ofc = ones; 817 fpscrMask.ufc = ones; 818 fpscrMask.ixc = ones; 819 fpscrMask.idc = ones; 820 fpscrMask.ioe = ones; 821 fpscrMask.dze = ones; 822 fpscrMask.ofe = ones; 823 fpscrMask.ufe = ones; 824 fpscrMask.ixe = ones; 825 fpscrMask.ide = ones; 826 fpscrMask.len = ones; 827 fpscrMask.stride = ones; 828 fpscrMask.rMode = ones; 829 fpscrMask.fz = ones; 830 fpscrMask.dn = ones; 831 fpscrMask.ahp = ones; 832 fpscrMask.qc = ones; 833 fpscrMask.v = ones; 834 fpscrMask.c = ones; 835 fpscrMask.z = ones; 836 fpscrMask.n = ones; 837 newVal = (newVal & (uint32_t)fpscrMask) | 838 (readMiscRegNoEffect(MISCREG_FPSCR) & 839 ~(uint32_t)fpscrMask); 840 tc->getDecoderPtr()->setContext(newVal); 841 } 842 break; 843 case MISCREG_FPSR: 844 { 845 const uint32_t ones = (uint32_t)(-1); 846 FPSCR fpscrMask = 0; 847 fpscrMask.ioc = ones; 848 fpscrMask.dzc = ones; 849 fpscrMask.ofc = ones; 850 fpscrMask.ufc = ones; 851 fpscrMask.ixc = ones; 852 fpscrMask.idc = ones; 853 fpscrMask.qc = ones; 854 fpscrMask.v = ones; 855 fpscrMask.c = ones; 856 fpscrMask.z = ones; 857 fpscrMask.n = ones; 858 newVal = (newVal & (uint32_t)fpscrMask) | 859 (readMiscRegNoEffect(MISCREG_FPSCR) & 860 ~(uint32_t)fpscrMask); 861 misc_reg = MISCREG_FPSCR; 862 } 863 break; 864 case MISCREG_FPCR: 865 { 866 const uint32_t ones = (uint32_t)(-1); 867 FPSCR fpscrMask = 0; 868 fpscrMask.ioe = ones; 869 fpscrMask.dze = ones; 870 fpscrMask.ofe = ones; 871 fpscrMask.ufe = ones; 872 fpscrMask.ixe = ones; 873 fpscrMask.ide = ones; 874 fpscrMask.len = ones; 875 fpscrMask.stride = ones; 876 fpscrMask.rMode = ones; 877 fpscrMask.fz = ones; 878 fpscrMask.dn = ones; 879 fpscrMask.ahp = ones; 880 newVal = (newVal & (uint32_t)fpscrMask) | 881 (readMiscRegNoEffect(MISCREG_FPSCR) & 882 ~(uint32_t)fpscrMask); 883 misc_reg = MISCREG_FPSCR; 884 } 885 break; 886 case MISCREG_CPSR_Q: 887 { 888 assert(!(newVal & ~CpsrMaskQ)); 889 newVal = readMiscRegNoEffect(MISCREG_CPSR) | newVal; 890 misc_reg = MISCREG_CPSR; 891 } 892 break; 893 case MISCREG_FPSCR_QC: 894 { 895 newVal = readMiscRegNoEffect(MISCREG_FPSCR) | 896 (newVal & FpscrQcMask); 897 misc_reg = MISCREG_FPSCR; 898 } 899 break; 900 case MISCREG_FPSCR_EXC: 901 { 902 newVal = readMiscRegNoEffect(MISCREG_FPSCR) | 903 (newVal & FpscrExcMask); 904 misc_reg = MISCREG_FPSCR; 905 } 906 break; 907 case MISCREG_FPEXC: 908 { 909 // vfpv3 architecture, section B.6.1 of DDI04068 910 // bit 29 - valid only if fpexc[31] is 0 911 const uint32_t fpexcMask = 0x60000000; 912 newVal = (newVal & fpexcMask) | 913 (readMiscRegNoEffect(MISCREG_FPEXC) & ~fpexcMask); 914 } 915 break; 916 case MISCREG_HCR: 917 { 918 if (!haveVirtualization) 919 return; 920 } 921 break; 922 case MISCREG_IFSR: 923 { 924 // ARM ARM (ARM DDI 0406C.b) B4.1.96 925 const uint32_t ifsrMask = 926 mask(31, 13) | mask(11, 11) | mask(8, 6); 927 newVal = newVal & ~ifsrMask; 928 } 929 break; 930 case MISCREG_DFSR: 931 { 932 // ARM ARM (ARM DDI 0406C.b) B4.1.52 933 const uint32_t dfsrMask = mask(31, 14) | mask(8, 8); 934 newVal = newVal & ~dfsrMask; 935 } 936 break; 937 case MISCREG_AMAIR0: 938 case MISCREG_AMAIR1: 939 { 940 // ARM ARM (ARM DDI 0406C.b) B4.1.5 941 // Valid only with LPAE 942 if (!haveLPAE) 943 return; 944 DPRINTF(MiscRegs, "Writing AMAIR: %#x\n", newVal); 945 } 946 break; 947 case MISCREG_SCR: 948 getITBPtr(tc)->invalidateMiscReg(); 949 getDTBPtr(tc)->invalidateMiscReg(); 950 break; 951 case MISCREG_SCTLR: 952 { 953 DPRINTF(MiscRegs, "Writing SCTLR: %#x\n", newVal); 954 scr = readMiscRegNoEffect(MISCREG_SCR); 955 956 MiscRegIndex sctlr_idx; 957 if (haveSecurity && !highestELIs64 && !scr.ns) { 958 sctlr_idx = MISCREG_SCTLR_S; 959 } else { 960 sctlr_idx = MISCREG_SCTLR_NS; 961 } 962 963 SCTLR sctlr = miscRegs[sctlr_idx]; 964 SCTLR new_sctlr = newVal; 965 new_sctlr.nmfi = ((bool)sctlr.nmfi) && !haveVirtualization; 966 miscRegs[sctlr_idx] = (MiscReg)new_sctlr; 967 getITBPtr(tc)->invalidateMiscReg(); 968 getDTBPtr(tc)->invalidateMiscReg(); 969 } 970 case MISCREG_MIDR: 971 case MISCREG_ID_PFR0: 972 case MISCREG_ID_PFR1: 973 case MISCREG_ID_DFR0: 974 case MISCREG_ID_MMFR0: 975 case MISCREG_ID_MMFR1: 976 case MISCREG_ID_MMFR2: 977 case MISCREG_ID_MMFR3: 978 case MISCREG_ID_ISAR0: 979 case MISCREG_ID_ISAR1: 980 case MISCREG_ID_ISAR2: 981 case MISCREG_ID_ISAR3: 982 case MISCREG_ID_ISAR4: 983 case MISCREG_ID_ISAR5: 984 985 case MISCREG_MPIDR: 986 case MISCREG_FPSID: 987 case MISCREG_TLBTR: 988 case MISCREG_MVFR0: 989 case MISCREG_MVFR1: 990 991 case MISCREG_ID_AA64AFR0_EL1: 992 case MISCREG_ID_AA64AFR1_EL1: 993 case MISCREG_ID_AA64DFR0_EL1: 994 case MISCREG_ID_AA64DFR1_EL1: 995 case MISCREG_ID_AA64ISAR0_EL1: 996 case MISCREG_ID_AA64ISAR1_EL1: 997 case MISCREG_ID_AA64MMFR0_EL1: 998 case MISCREG_ID_AA64MMFR1_EL1: 999 case MISCREG_ID_AA64PFR0_EL1: 1000 case MISCREG_ID_AA64PFR1_EL1: 1001 // ID registers are constants. 1002 return; 1003 1004 // TLB Invalidate All 1005 case MISCREG_TLBIALL: // TLBI all entries, EL0&1, 1006 { 1007 assert32(tc); 1008 scr = readMiscReg(MISCREG_SCR, tc); 1009 1010 TLBIALL tlbiOp(EL1, haveSecurity && !scr.ns); 1011 tlbiOp(tc); 1012 return; 1013 } 1014 // TLB Invalidate All, Inner Shareable 1015 case MISCREG_TLBIALLIS: 1016 { 1017 assert32(tc); 1018 scr = readMiscReg(MISCREG_SCR, tc); 1019 1020 TLBIALL tlbiOp(EL1, haveSecurity && !scr.ns); 1021 tlbiOp.broadcast(tc); 1022 return; 1023 } 1024 // Instruction TLB Invalidate All 1025 case MISCREG_ITLBIALL: 1026 { 1027 assert32(tc); 1028 scr = readMiscReg(MISCREG_SCR, tc); 1029 1030 ITLBIALL tlbiOp(EL1, haveSecurity && !scr.ns); 1031 tlbiOp(tc); 1032 return; 1033 } 1034 // Data TLB Invalidate All 1035 case MISCREG_DTLBIALL: 1036 { 1037 assert32(tc); 1038 scr = readMiscReg(MISCREG_SCR, tc); 1039 1040 DTLBIALL tlbiOp(EL1, haveSecurity && !scr.ns); 1041 tlbiOp(tc); 1042 return; 1043 } 1044 // TLB Invalidate by VA 1045 // mcr tlbimval(is) is invalidating all matching entries 1046 // regardless of the level of lookup, since in gem5 we cache 1047 // in the tlb the last level of lookup only. 1048 case MISCREG_TLBIMVA: 1049 case MISCREG_TLBIMVAL: 1050 { 1051 assert32(tc); 1052 scr = readMiscReg(MISCREG_SCR, tc); 1053 1054 TLBIMVA tlbiOp(EL1, 1055 haveSecurity && !scr.ns, 1056 mbits(newVal, 31, 12), 1057 bits(newVal, 7,0)); 1058 1059 tlbiOp(tc); 1060 return; 1061 } 1062 // TLB Invalidate by VA, Inner Shareable 1063 case MISCREG_TLBIMVAIS: 1064 case MISCREG_TLBIMVALIS: 1065 { 1066 assert32(tc); 1067 scr = readMiscReg(MISCREG_SCR, tc); 1068 1069 TLBIMVA tlbiOp(EL1, 1070 haveSecurity && !scr.ns, 1071 mbits(newVal, 31, 12), 1072 bits(newVal, 7,0)); 1073 1074 tlbiOp.broadcast(tc); 1075 return; 1076 } 1077 // TLB Invalidate by ASID match 1078 case MISCREG_TLBIASID: 1079 { 1080 assert32(tc); 1081 scr = readMiscReg(MISCREG_SCR, tc); 1082 1083 TLBIASID tlbiOp(EL1, 1084 haveSecurity && !scr.ns, 1085 bits(newVal, 7,0)); 1086 1087 tlbiOp(tc); 1088 return; 1089 } 1090 // TLB Invalidate by ASID match, Inner Shareable 1091 case MISCREG_TLBIASIDIS: 1092 { 1093 assert32(tc); 1094 scr = readMiscReg(MISCREG_SCR, tc); 1095 1096 TLBIASID tlbiOp(EL1, 1097 haveSecurity && !scr.ns, 1098 bits(newVal, 7,0)); 1099 1100 tlbiOp.broadcast(tc); 1101 return; 1102 } 1103 // mcr tlbimvaal(is) is invalidating all matching entries 1104 // regardless of the level of lookup, since in gem5 we cache 1105 // in the tlb the last level of lookup only. 1106 // TLB Invalidate by VA, All ASID 1107 case MISCREG_TLBIMVAA: 1108 case MISCREG_TLBIMVAAL: 1109 { 1110 assert32(tc); 1111 scr = readMiscReg(MISCREG_SCR, tc); 1112 1113 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns, 1114 mbits(newVal, 31,12), false); 1115 1116 tlbiOp(tc); 1117 return; 1118 } 1119 // TLB Invalidate by VA, All ASID, Inner Shareable 1120 case MISCREG_TLBIMVAAIS: 1121 case MISCREG_TLBIMVAALIS: 1122 { 1123 assert32(tc); 1124 scr = readMiscReg(MISCREG_SCR, tc); 1125 1126 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns, 1127 mbits(newVal, 31,12), false); 1128 1129 tlbiOp.broadcast(tc); 1130 return; 1131 } 1132 // mcr tlbimvalh(is) is invalidating all matching entries 1133 // regardless of the level of lookup, since in gem5 we cache 1134 // in the tlb the last level of lookup only. 1135 // TLB Invalidate by VA, Hyp mode 1136 case MISCREG_TLBIMVAH: 1137 case MISCREG_TLBIMVALH: 1138 { 1139 assert32(tc); 1140 scr = readMiscReg(MISCREG_SCR, tc); 1141 1142 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns, 1143 mbits(newVal, 31,12), true); 1144 1145 tlbiOp(tc); 1146 return; 1147 } 1148 // TLB Invalidate by VA, Hyp mode, Inner Shareable 1149 case MISCREG_TLBIMVAHIS: 1150 case MISCREG_TLBIMVALHIS: 1151 { 1152 assert32(tc); 1153 scr = readMiscReg(MISCREG_SCR, tc); 1154 1155 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns, 1156 mbits(newVal, 31,12), true); 1157 1158 tlbiOp.broadcast(tc); 1159 return; 1160 } 1161 // mcr tlbiipas2l(is) is invalidating all matching entries 1162 // regardless of the level of lookup, since in gem5 we cache 1163 // in the tlb the last level of lookup only. 1164 // TLB Invalidate by Intermediate Physical Address, Stage 2 1165 case MISCREG_TLBIIPAS2: 1166 case MISCREG_TLBIIPAS2L: 1167 { 1168 assert32(tc); 1169 scr = readMiscReg(MISCREG_SCR, tc); 1170 1171 TLBIIPA tlbiOp(EL1, 1172 haveSecurity && !scr.ns, 1173 static_cast<Addr>(bits(newVal, 35, 0)) << 12); 1174 1175 tlbiOp(tc); 1176 return; 1177 } 1178 // TLB Invalidate by Intermediate Physical Address, Stage 2, 1179 // Inner Shareable 1180 case MISCREG_TLBIIPAS2IS: 1181 case MISCREG_TLBIIPAS2LIS: 1182 { 1183 assert32(tc); 1184 scr = readMiscReg(MISCREG_SCR, tc); 1185 1186 TLBIIPA tlbiOp(EL1, 1187 haveSecurity && !scr.ns, 1188 static_cast<Addr>(bits(newVal, 35, 0)) << 12); 1189 1190 tlbiOp.broadcast(tc); 1191 return; 1192 } 1193 // Instruction TLB Invalidate by VA 1194 case MISCREG_ITLBIMVA: 1195 { 1196 assert32(tc); 1197 scr = readMiscReg(MISCREG_SCR, tc); 1198 1199 ITLBIMVA tlbiOp(EL1, 1200 haveSecurity && !scr.ns, 1201 mbits(newVal, 31, 12), 1202 bits(newVal, 7,0)); 1203 1204 tlbiOp(tc); 1205 return; 1206 } 1207 // Data TLB Invalidate by VA 1208 case MISCREG_DTLBIMVA: 1209 { 1210 assert32(tc); 1211 scr = readMiscReg(MISCREG_SCR, tc); 1212 1213 DTLBIMVA tlbiOp(EL1, 1214 haveSecurity && !scr.ns, 1215 mbits(newVal, 31, 12), 1216 bits(newVal, 7,0)); 1217 1218 tlbiOp(tc); 1219 return; 1220 } 1221 // Instruction TLB Invalidate by ASID match 1222 case MISCREG_ITLBIASID: 1223 { 1224 assert32(tc); 1225 scr = readMiscReg(MISCREG_SCR, tc); 1226 1227 ITLBIASID tlbiOp(EL1, 1228 haveSecurity && !scr.ns, 1229 bits(newVal, 7,0)); 1230 1231 tlbiOp(tc); 1232 return; 1233 } 1234 // Data TLB Invalidate by ASID match 1235 case MISCREG_DTLBIASID: 1236 { 1237 assert32(tc); 1238 scr = readMiscReg(MISCREG_SCR, tc); 1239 1240 DTLBIASID tlbiOp(EL1, 1241 haveSecurity && !scr.ns, 1242 bits(newVal, 7,0)); 1243 1244 tlbiOp(tc); 1245 return; 1246 } 1247 // TLB Invalidate All, Non-Secure Non-Hyp 1248 case MISCREG_TLBIALLNSNH: 1249 { 1250 assert32(tc); 1251 1252 TLBIALLN tlbiOp(EL1, false); 1253 tlbiOp(tc); 1254 return; 1255 } 1256 // TLB Invalidate All, Non-Secure Non-Hyp, Inner Shareable 1257 case MISCREG_TLBIALLNSNHIS: 1258 { 1259 assert32(tc); 1260 1261 TLBIALLN tlbiOp(EL1, false); 1262 tlbiOp.broadcast(tc); 1263 return; 1264 } 1265 // TLB Invalidate All, Hyp mode 1266 case MISCREG_TLBIALLH: 1267 { 1268 assert32(tc); 1269 1270 TLBIALLN tlbiOp(EL1, true); 1271 tlbiOp(tc); 1272 return; 1273 } 1274 // TLB Invalidate All, Hyp mode, Inner Shareable 1275 case MISCREG_TLBIALLHIS: 1276 { 1277 assert32(tc); 1278 1279 TLBIALLN tlbiOp(EL1, true); 1280 tlbiOp.broadcast(tc); 1281 return; 1282 } 1283 // AArch64 TLB Invalidate All, EL3 1284 case MISCREG_TLBI_ALLE3: 1285 { 1286 assert64(tc); 1287 1288 TLBIALL tlbiOp(EL3, true); 1289 tlbiOp(tc); 1290 return; 1291 } 1292 // AArch64 TLB Invalidate All, EL3, Inner Shareable 1293 case MISCREG_TLBI_ALLE3IS: 1294 { 1295 assert64(tc); 1296 1297 TLBIALL tlbiOp(EL3, true); 1298 tlbiOp.broadcast(tc); 1299 return; 1300 } 1301 // @todo: uncomment this to enable Virtualization 1302 // case MISCREG_TLBI_ALLE2IS: 1303 // case MISCREG_TLBI_ALLE2: 1304 // AArch64 TLB Invalidate All, EL1 1305 case MISCREG_TLBI_ALLE1: 1306 case MISCREG_TLBI_VMALLE1: 1307 case MISCREG_TLBI_VMALLS12E1: 1308 // @todo: handle VMID and stage 2 to enable Virtualization 1309 { 1310 assert64(tc); 1311 scr = readMiscReg(MISCREG_SCR, tc); 1312 1313 TLBIALL tlbiOp(EL1, haveSecurity && !scr.ns); 1314 tlbiOp(tc); 1315 return; 1316 } 1317 // AArch64 TLB Invalidate All, EL1, Inner Shareable 1318 case MISCREG_TLBI_ALLE1IS: 1319 case MISCREG_TLBI_VMALLE1IS: 1320 case MISCREG_TLBI_VMALLS12E1IS: 1321 // @todo: handle VMID and stage 2 to enable Virtualization 1322 { 1323 assert64(tc); 1324 scr = readMiscReg(MISCREG_SCR, tc); 1325 1326 TLBIALL tlbiOp(EL1, haveSecurity && !scr.ns); 1327 tlbiOp.broadcast(tc); 1328 return; 1329 } 1330 // VAEx(IS) and VALEx(IS) are the same because TLBs 1331 // only store entries 1332 // from the last level of translation table walks 1333 // @todo: handle VMID to enable Virtualization 1334 // AArch64 TLB Invalidate by VA, EL3 1335 case MISCREG_TLBI_VAE3_Xt: 1336 case MISCREG_TLBI_VALE3_Xt: 1337 { 1338 assert64(tc); 1339 1340 TLBIMVA tlbiOp(EL3, true, 1341 static_cast<Addr>(bits(newVal, 43, 0)) << 12, 1342 0xbeef); 1343 tlbiOp(tc); 1344 return; 1345 } 1346 // AArch64 TLB Invalidate by VA, EL3, Inner Shareable 1347 case MISCREG_TLBI_VAE3IS_Xt: 1348 case MISCREG_TLBI_VALE3IS_Xt: 1349 { 1350 assert64(tc); 1351 1352 TLBIMVA tlbiOp(EL3, true, 1353 static_cast<Addr>(bits(newVal, 43, 0)) << 12, 1354 0xbeef); 1355 1356 tlbiOp.broadcast(tc); 1357 return; 1358 } 1359 // AArch64 TLB Invalidate by VA, EL2 1360 case MISCREG_TLBI_VAE2_Xt: 1361 case MISCREG_TLBI_VALE2_Xt: 1362 { 1363 assert64(tc); 1364 scr = readMiscReg(MISCREG_SCR, tc); 1365 1366 TLBIMVA tlbiOp(EL2, haveSecurity && !scr.ns, 1367 static_cast<Addr>(bits(newVal, 43, 0)) << 12, 1368 0xbeef); 1369 tlbiOp(tc); 1370 return; 1371 } 1372 // AArch64 TLB Invalidate by VA, EL2, Inner Shareable 1373 case MISCREG_TLBI_VAE2IS_Xt: 1374 case MISCREG_TLBI_VALE2IS_Xt: 1375 { 1376 assert64(tc); 1377 scr = readMiscReg(MISCREG_SCR, tc); 1378 1379 TLBIMVA tlbiOp(EL2, haveSecurity && !scr.ns, 1380 static_cast<Addr>(bits(newVal, 43, 0)) << 12, 1381 0xbeef); 1382 1383 tlbiOp.broadcast(tc); 1384 return; 1385 } 1386 // AArch64 TLB Invalidate by VA, EL1 1387 case MISCREG_TLBI_VAE1_Xt: 1388 case MISCREG_TLBI_VALE1_Xt: 1389 { 1390 assert64(tc); 1391 scr = readMiscReg(MISCREG_SCR, tc); 1392 auto asid = haveLargeAsid64 ? bits(newVal, 63, 48) : 1393 bits(newVal, 55, 48); 1394 1395 TLBIMVA tlbiOp(EL1, haveSecurity && !scr.ns, 1396 static_cast<Addr>(bits(newVal, 43, 0)) << 12, 1397 asid); 1398 1399 tlbiOp(tc); 1400 return; 1401 } 1402 // AArch64 TLB Invalidate by VA, EL1, Inner Shareable 1403 case MISCREG_TLBI_VAE1IS_Xt: 1404 case MISCREG_TLBI_VALE1IS_Xt: 1405 { 1406 assert64(tc); 1407 scr = readMiscReg(MISCREG_SCR, tc); 1408 auto asid = haveLargeAsid64 ? bits(newVal, 63, 48) : 1409 bits(newVal, 55, 48); 1410 1411 TLBIMVA tlbiOp(EL1, haveSecurity && !scr.ns, 1412 static_cast<Addr>(bits(newVal, 43, 0)) << 12, 1413 asid); 1414 1415 tlbiOp.broadcast(tc); 1416 return; 1417 } 1418 // AArch64 TLB Invalidate by ASID, EL1 1419 // @todo: handle VMID to enable Virtualization 1420 case MISCREG_TLBI_ASIDE1_Xt: 1421 { 1422 assert64(tc); 1423 scr = readMiscReg(MISCREG_SCR, tc); 1424 auto asid = haveLargeAsid64 ? bits(newVal, 63, 48) : 1425 bits(newVal, 55, 48); 1426 1427 TLBIASID tlbiOp(EL1, haveSecurity && !scr.ns, asid); 1428 tlbiOp(tc); 1429 return; 1430 } 1431 // AArch64 TLB Invalidate by ASID, EL1, Inner Shareable 1432 case MISCREG_TLBI_ASIDE1IS_Xt: 1433 { 1434 assert64(tc); 1435 scr = readMiscReg(MISCREG_SCR, tc); 1436 auto asid = haveLargeAsid64 ? bits(newVal, 63, 48) : 1437 bits(newVal, 55, 48); 1438 1439 TLBIASID tlbiOp(EL1, haveSecurity && !scr.ns, asid); 1440 tlbiOp.broadcast(tc); 1441 return; 1442 } 1443 // VAAE1(IS) and VAALE1(IS) are the same because TLBs only store 1444 // entries from the last level of translation table walks 1445 // AArch64 TLB Invalidate by VA, All ASID, EL1 1446 case MISCREG_TLBI_VAAE1_Xt: 1447 case MISCREG_TLBI_VAALE1_Xt: 1448 { 1449 assert64(tc); 1450 scr = readMiscReg(MISCREG_SCR, tc); 1451 1452 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns, 1453 static_cast<Addr>(bits(newVal, 43, 0)) << 12, false); 1454 1455 tlbiOp(tc); 1456 return; 1457 } 1458 // AArch64 TLB Invalidate by VA, All ASID, EL1, Inner Shareable 1459 case MISCREG_TLBI_VAAE1IS_Xt: 1460 case MISCREG_TLBI_VAALE1IS_Xt: 1461 { 1462 assert64(tc); 1463 scr = readMiscReg(MISCREG_SCR, tc); 1464 1465 TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns, 1466 static_cast<Addr>(bits(newVal, 43, 0)) << 12, false); 1467 1468 tlbiOp.broadcast(tc); 1469 return; 1470 } 1471 // AArch64 TLB Invalidate by Intermediate Physical Address, 1472 // Stage 2, EL1 1473 case MISCREG_TLBI_IPAS2E1_Xt: 1474 case MISCREG_TLBI_IPAS2LE1_Xt: 1475 { 1476 assert64(tc); 1477 scr = readMiscReg(MISCREG_SCR, tc); 1478 1479 TLBIIPA tlbiOp(EL1, haveSecurity && !scr.ns, 1480 static_cast<Addr>(bits(newVal, 35, 0)) << 12); 1481 1482 tlbiOp(tc); 1483 return; 1484 } 1485 // AArch64 TLB Invalidate by Intermediate Physical Address, 1486 // Stage 2, EL1, Inner Shareable 1487 case MISCREG_TLBI_IPAS2E1IS_Xt: 1488 case MISCREG_TLBI_IPAS2LE1IS_Xt: 1489 { 1490 assert64(tc); 1491 scr = readMiscReg(MISCREG_SCR, tc); 1492 1493 TLBIIPA tlbiOp(EL1, haveSecurity && !scr.ns, 1494 static_cast<Addr>(bits(newVal, 35, 0)) << 12); 1495 1496 tlbiOp.broadcast(tc); 1497 return; 1498 } 1499 case MISCREG_ACTLR: 1500 warn("Not doing anything for write of miscreg ACTLR\n"); 1501 break; 1502 1503 case MISCREG_PMXEVTYPER_PMCCFILTR: 1504 case MISCREG_PMINTENSET_EL1 ... MISCREG_PMOVSSET_EL0: 1505 case MISCREG_PMEVCNTR0_EL0 ... MISCREG_PMEVTYPER5_EL0: 1506 case MISCREG_PMCR ... MISCREG_PMOVSSET: 1507 pmu->setMiscReg(misc_reg, newVal); 1508 break; 1509 1510 1511 case MISCREG_HSTR: // TJDBX, now redifined to be RES0 1512 { 1513 HSTR hstrMask = 0; 1514 hstrMask.tjdbx = 1; 1515 newVal &= ~((uint32_t) hstrMask); 1516 break; 1517 } 1518 case MISCREG_HCPTR: 1519 { 1520 // If a CP bit in NSACR is 0 then the corresponding bit in 1521 // HCPTR is RAO/WI. Same applies to NSASEDIS 1522 secure_lookup = haveSecurity && 1523 inSecureState(readMiscRegNoEffect(MISCREG_SCR), 1524 readMiscRegNoEffect(MISCREG_CPSR)); 1525 if (!secure_lookup) { 1526 MiscReg oldValue = readMiscRegNoEffect(MISCREG_HCPTR); 1527 MiscReg mask = (readMiscRegNoEffect(MISCREG_NSACR) ^ 0x7FFF) & 0xBFFF; 1528 newVal = (newVal & ~mask) | (oldValue & mask); 1529 } 1530 break; 1531 } 1532 case MISCREG_HDFAR: // alias for secure DFAR 1533 misc_reg = MISCREG_DFAR_S; 1534 break; 1535 case MISCREG_HIFAR: // alias for secure IFAR 1536 misc_reg = MISCREG_IFAR_S; 1537 break; 1538 case MISCREG_ATS1CPR: 1539 case MISCREG_ATS1CPW: 1540 case MISCREG_ATS1CUR: 1541 case MISCREG_ATS1CUW: 1542 case MISCREG_ATS12NSOPR: 1543 case MISCREG_ATS12NSOPW: 1544 case MISCREG_ATS12NSOUR: 1545 case MISCREG_ATS12NSOUW: 1546 case MISCREG_ATS1HR: 1547 case MISCREG_ATS1HW: 1548 { 1549 Request::Flags flags = 0; 1550 BaseTLB::Mode mode = BaseTLB::Read; 1551 TLB::ArmTranslationType tranType = TLB::NormalTran; 1552 Fault fault; 1553 switch(misc_reg) { 1554 case MISCREG_ATS1CPR: 1555 flags = TLB::MustBeOne; 1556 tranType = TLB::S1CTran; 1557 mode = BaseTLB::Read; 1558 break; 1559 case MISCREG_ATS1CPW: 1560 flags = TLB::MustBeOne; 1561 tranType = TLB::S1CTran; 1562 mode = BaseTLB::Write; 1563 break; 1564 case MISCREG_ATS1CUR: 1565 flags = TLB::MustBeOne | TLB::UserMode; 1566 tranType = TLB::S1CTran; 1567 mode = BaseTLB::Read; 1568 break; 1569 case MISCREG_ATS1CUW: 1570 flags = TLB::MustBeOne | TLB::UserMode; 1571 tranType = TLB::S1CTran; 1572 mode = BaseTLB::Write; 1573 break; 1574 case MISCREG_ATS12NSOPR: 1575 if (!haveSecurity) 1576 panic("Security Extensions required for ATS12NSOPR"); 1577 flags = TLB::MustBeOne; 1578 tranType = TLB::S1S2NsTran; 1579 mode = BaseTLB::Read; 1580 break; 1581 case MISCREG_ATS12NSOPW: 1582 if (!haveSecurity) 1583 panic("Security Extensions required for ATS12NSOPW"); 1584 flags = TLB::MustBeOne; 1585 tranType = TLB::S1S2NsTran; 1586 mode = BaseTLB::Write; 1587 break; 1588 case MISCREG_ATS12NSOUR: 1589 if (!haveSecurity) 1590 panic("Security Extensions required for ATS12NSOUR"); 1591 flags = TLB::MustBeOne | TLB::UserMode; 1592 tranType = TLB::S1S2NsTran; 1593 mode = BaseTLB::Read; 1594 break; 1595 case MISCREG_ATS12NSOUW: 1596 if (!haveSecurity) 1597 panic("Security Extensions required for ATS12NSOUW"); 1598 flags = TLB::MustBeOne | TLB::UserMode; 1599 tranType = TLB::S1S2NsTran; 1600 mode = BaseTLB::Write; 1601 break; 1602 case MISCREG_ATS1HR: // only really useful from secure mode. 1603 flags = TLB::MustBeOne; 1604 tranType = TLB::HypMode; 1605 mode = BaseTLB::Read; 1606 break; 1607 case MISCREG_ATS1HW: 1608 flags = TLB::MustBeOne; 1609 tranType = TLB::HypMode; 1610 mode = BaseTLB::Write; 1611 break; 1612 } 1613 // If we're in timing mode then doing the translation in 1614 // functional mode then we're slightly distorting performance 1615 // results obtained from simulations. The translation should be 1616 // done in the same mode the core is running in. NOTE: This 1617 // can't be an atomic translation because that causes problems 1618 // with unexpected atomic snoop requests. 1619 warn("Translating via MISCREG(%d) in functional mode! Fix Me!\n", misc_reg); 1620 Request req(0, val, 0, flags, Request::funcMasterId, 1621 tc->pcState().pc(), tc->contextId()); 1622 fault = getDTBPtr(tc)->translateFunctional( 1623 &req, tc, mode, tranType); 1624 TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR); 1625 HCR hcr = readMiscRegNoEffect(MISCREG_HCR); 1626 1627 MiscReg newVal; 1628 if (fault == NoFault) { 1629 Addr paddr = req.getPaddr(); 1630 if (haveLPAE && (ttbcr.eae || tranType & TLB::HypMode || 1631 ((tranType & TLB::S1S2NsTran) && hcr.vm) )) { 1632 newVal = (paddr & mask(39, 12)) | 1633 (getDTBPtr(tc)->getAttr()); 1634 } else { 1635 newVal = (paddr & 0xfffff000) | 1636 (getDTBPtr(tc)->getAttr()); 1637 } 1638 DPRINTF(MiscRegs, 1639 "MISCREG: Translated addr 0x%08x: PAR: 0x%08x\n", 1640 val, newVal); 1641 } else { 1642 ArmFault *armFault = static_cast<ArmFault *>(fault.get()); 1643 armFault->update(tc); 1644 // Set fault bit and FSR 1645 FSR fsr = armFault->getFsr(tc); 1646 1647 newVal = ((fsr >> 9) & 1) << 11; 1648 if (newVal) { 1649 // LPAE - rearange fault status 1650 newVal |= ((fsr >> 0) & 0x3f) << 1; 1651 } else { 1652 // VMSA - rearange fault status 1653 newVal |= ((fsr >> 0) & 0xf) << 1; 1654 newVal |= ((fsr >> 10) & 0x1) << 5; 1655 newVal |= ((fsr >> 12) & 0x1) << 6; 1656 } 1657 newVal |= 0x1; // F bit 1658 newVal |= ((armFault->iss() >> 7) & 0x1) << 8; 1659 newVal |= armFault->isStage2() ? 0x200 : 0; 1660 DPRINTF(MiscRegs, 1661 "MISCREG: Translated addr 0x%08x fault fsr %#x: PAR: 0x%08x\n", 1662 val, fsr, newVal); 1663 } 1664 setMiscRegNoEffect(MISCREG_PAR, newVal); 1665 return; 1666 } 1667 case MISCREG_TTBCR: 1668 { 1669 TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR); 1670 const uint32_t ones = (uint32_t)(-1); 1671 TTBCR ttbcrMask = 0; 1672 TTBCR ttbcrNew = newVal; 1673 1674 // ARM DDI 0406C.b, ARMv7-32 1675 ttbcrMask.n = ones; // T0SZ 1676 if (haveSecurity) { 1677 ttbcrMask.pd0 = ones; 1678 ttbcrMask.pd1 = ones; 1679 } 1680 ttbcrMask.epd0 = ones; 1681 ttbcrMask.irgn0 = ones; 1682 ttbcrMask.orgn0 = ones; 1683 ttbcrMask.sh0 = ones; 1684 ttbcrMask.ps = ones; // T1SZ 1685 ttbcrMask.a1 = ones; 1686 ttbcrMask.epd1 = ones; 1687 ttbcrMask.irgn1 = ones; 1688 ttbcrMask.orgn1 = ones; 1689 ttbcrMask.sh1 = ones; 1690 if (haveLPAE) 1691 ttbcrMask.eae = ones; 1692 1693 if (haveLPAE && ttbcrNew.eae) { 1694 newVal = newVal & ttbcrMask; 1695 } else { 1696 newVal = (newVal & ttbcrMask) | (ttbcr & (~ttbcrMask)); 1697 } 1698 // Invalidate TLB MiscReg 1699 getITBPtr(tc)->invalidateMiscReg(); 1700 getDTBPtr(tc)->invalidateMiscReg(); 1701 break; 1702 } 1703 case MISCREG_TTBR0: 1704 case MISCREG_TTBR1: 1705 { 1706 TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR); 1707 if (haveLPAE) { 1708 if (ttbcr.eae) { 1709 // ARMv7 bit 63-56, 47-40 reserved, UNK/SBZP 1710 // ARMv8 AArch32 bit 63-56 only 1711 uint64_t ttbrMask = mask(63,56) | mask(47,40); 1712 newVal = (newVal & (~ttbrMask)); 1713 } 1714 } 1715 // Invalidate TLB MiscReg 1716 getITBPtr(tc)->invalidateMiscReg(); 1717 getDTBPtr(tc)->invalidateMiscReg(); 1718 break; 1719 } 1720 case MISCREG_SCTLR_EL1: 1721 case MISCREG_CONTEXTIDR: 1722 case MISCREG_PRRR: 1723 case MISCREG_NMRR: 1724 case MISCREG_MAIR0: 1725 case MISCREG_MAIR1: 1726 case MISCREG_DACR: 1727 case MISCREG_VTTBR: 1728 case MISCREG_SCR_EL3: 1729 case MISCREG_HCR_EL2: 1730 case MISCREG_TCR_EL1: 1731 case MISCREG_TCR_EL2: 1732 case MISCREG_TCR_EL3: 1733 case MISCREG_SCTLR_EL2: 1734 case MISCREG_SCTLR_EL3: 1735 case MISCREG_HSCTLR: 1736 case MISCREG_TTBR0_EL1: 1737 case MISCREG_TTBR1_EL1: 1738 case MISCREG_TTBR0_EL2: 1739 case MISCREG_TTBR0_EL3: 1740 getITBPtr(tc)->invalidateMiscReg(); 1741 getDTBPtr(tc)->invalidateMiscReg(); 1742 break; 1743 case MISCREG_NZCV: 1744 { 1745 CPSR cpsr = val; 1746 1747 tc->setCCReg(CCREG_NZ, cpsr.nz); 1748 tc->setCCReg(CCREG_C, cpsr.c); 1749 tc->setCCReg(CCREG_V, cpsr.v); 1750 } 1751 break; 1752 case MISCREG_DAIF: 1753 { 1754 CPSR cpsr = miscRegs[MISCREG_CPSR]; 1755 cpsr.daif = (uint8_t) ((CPSR) newVal).daif; 1756 newVal = cpsr; 1757 misc_reg = MISCREG_CPSR; 1758 } 1759 break; 1760 case MISCREG_SP_EL0: 1761 tc->setIntReg(INTREG_SP0, newVal); 1762 break; 1763 case MISCREG_SP_EL1: 1764 tc->setIntReg(INTREG_SP1, newVal); 1765 break; 1766 case MISCREG_SP_EL2: 1767 tc->setIntReg(INTREG_SP2, newVal); 1768 break; 1769 case MISCREG_SPSEL: 1770 { 1771 CPSR cpsr = miscRegs[MISCREG_CPSR]; 1772 cpsr.sp = (uint8_t) ((CPSR) newVal).sp; 1773 newVal = cpsr; 1774 misc_reg = MISCREG_CPSR; 1775 } 1776 break; 1777 case MISCREG_CURRENTEL: 1778 { 1779 CPSR cpsr = miscRegs[MISCREG_CPSR]; 1780 cpsr.el = (uint8_t) ((CPSR) newVal).el; 1781 newVal = cpsr; 1782 misc_reg = MISCREG_CPSR; 1783 } 1784 break; 1785 case MISCREG_AT_S1E1R_Xt: 1786 case MISCREG_AT_S1E1W_Xt: 1787 case MISCREG_AT_S1E0R_Xt: 1788 case MISCREG_AT_S1E0W_Xt: 1789 case MISCREG_AT_S1E2R_Xt: 1790 case MISCREG_AT_S1E2W_Xt: 1791 case MISCREG_AT_S12E1R_Xt: 1792 case MISCREG_AT_S12E1W_Xt: 1793 case MISCREG_AT_S12E0R_Xt: 1794 case MISCREG_AT_S12E0W_Xt: 1795 case MISCREG_AT_S1E3R_Xt: 1796 case MISCREG_AT_S1E3W_Xt: 1797 { 1798 RequestPtr req = new Request; 1799 Request::Flags flags = 0; 1800 BaseTLB::Mode mode = BaseTLB::Read; 1801 TLB::ArmTranslationType tranType = TLB::NormalTran; 1802 Fault fault; 1803 switch(misc_reg) { 1804 case MISCREG_AT_S1E1R_Xt: 1805 flags = TLB::MustBeOne; 1806 tranType = TLB::S1E1Tran; 1807 mode = BaseTLB::Read; 1808 break; 1809 case MISCREG_AT_S1E1W_Xt: 1810 flags = TLB::MustBeOne; 1811 tranType = TLB::S1E1Tran; 1812 mode = BaseTLB::Write; 1813 break; 1814 case MISCREG_AT_S1E0R_Xt: 1815 flags = TLB::MustBeOne | TLB::UserMode; 1816 tranType = TLB::S1E0Tran; 1817 mode = BaseTLB::Read; 1818 break; 1819 case MISCREG_AT_S1E0W_Xt: 1820 flags = TLB::MustBeOne | TLB::UserMode; 1821 tranType = TLB::S1E0Tran; 1822 mode = BaseTLB::Write; 1823 break; 1824 case MISCREG_AT_S1E2R_Xt: 1825 flags = TLB::MustBeOne; 1826 tranType = TLB::S1E2Tran; 1827 mode = BaseTLB::Read; 1828 break; 1829 case MISCREG_AT_S1E2W_Xt: 1830 flags = TLB::MustBeOne; 1831 tranType = TLB::S1E2Tran; 1832 mode = BaseTLB::Write; 1833 break; 1834 case MISCREG_AT_S12E0R_Xt: 1835 flags = TLB::MustBeOne | TLB::UserMode; 1836 tranType = TLB::S12E0Tran; 1837 mode = BaseTLB::Read; 1838 break; 1839 case MISCREG_AT_S12E0W_Xt: 1840 flags = TLB::MustBeOne | TLB::UserMode; 1841 tranType = TLB::S12E0Tran; 1842 mode = BaseTLB::Write; 1843 break; 1844 case MISCREG_AT_S12E1R_Xt: 1845 flags = TLB::MustBeOne; 1846 tranType = TLB::S12E1Tran; 1847 mode = BaseTLB::Read; 1848 break; 1849 case MISCREG_AT_S12E1W_Xt: 1850 flags = TLB::MustBeOne; 1851 tranType = TLB::S12E1Tran; 1852 mode = BaseTLB::Write; 1853 break; 1854 case MISCREG_AT_S1E3R_Xt: 1855 flags = TLB::MustBeOne; 1856 tranType = TLB::S1E3Tran; 1857 mode = BaseTLB::Read; 1858 break; 1859 case MISCREG_AT_S1E3W_Xt: 1860 flags = TLB::MustBeOne; 1861 tranType = TLB::S1E3Tran; 1862 mode = BaseTLB::Write; 1863 break; 1864 } 1865 // If we're in timing mode then doing the translation in 1866 // functional mode then we're slightly distorting performance 1867 // results obtained from simulations. The translation should be 1868 // done in the same mode the core is running in. NOTE: This 1869 // can't be an atomic translation because that causes problems 1870 // with unexpected atomic snoop requests. 1871 warn("Translating via MISCREG(%d) in functional mode! Fix Me!\n", misc_reg); 1872 req->setVirt(0, val, 0, flags, Request::funcMasterId, 1873 tc->pcState().pc()); 1874 req->setContext(tc->contextId()); 1875 fault = getDTBPtr(tc)->translateFunctional(req, tc, mode, 1876 tranType); 1877 1878 MiscReg newVal; 1879 if (fault == NoFault) { 1880 Addr paddr = req->getPaddr(); 1881 uint64_t attr = getDTBPtr(tc)->getAttr(); 1882 uint64_t attr1 = attr >> 56; 1883 if (!attr1 || attr1 ==0x44) { 1884 attr |= 0x100; 1885 attr &= ~ uint64_t(0x80); 1886 } 1887 newVal = (paddr & mask(47, 12)) | attr; 1888 DPRINTF(MiscRegs, 1889 "MISCREG: Translated addr %#x: PAR_EL1: %#xx\n", 1890 val, newVal); 1891 } else { 1892 ArmFault *armFault = static_cast<ArmFault *>(fault.get()); 1893 armFault->update(tc); 1894 // Set fault bit and FSR 1895 FSR fsr = armFault->getFsr(tc); 1896 1897 CPSR cpsr = tc->readMiscReg(MISCREG_CPSR); 1898 if (cpsr.width) { // AArch32 1899 newVal = ((fsr >> 9) & 1) << 11; 1900 // rearrange fault status 1901 newVal |= ((fsr >> 0) & 0x3f) << 1; 1902 newVal |= 0x1; // F bit 1903 newVal |= ((armFault->iss() >> 7) & 0x1) << 8; 1904 newVal |= armFault->isStage2() ? 0x200 : 0; 1905 } else { // AArch64 1906 newVal = 1; // F bit 1907 newVal |= fsr << 1; // FST 1908 // TODO: DDI 0487A.f D7-2083, AbortFault's s1ptw bit. 1909 newVal |= armFault->isStage2() ? 1 << 8 : 0; // PTW 1910 newVal |= armFault->isStage2() ? 1 << 9 : 0; // S 1911 newVal |= 1 << 11; // RES1 1912 } 1913 DPRINTF(MiscRegs, 1914 "MISCREG: Translated addr %#x fault fsr %#x: PAR: %#x\n", 1915 val, fsr, newVal); 1916 } 1917 delete req; 1918 setMiscRegNoEffect(MISCREG_PAR_EL1, newVal); 1919 return; 1920 } 1921 case MISCREG_SPSR_EL3: 1922 case MISCREG_SPSR_EL2: 1923 case MISCREG_SPSR_EL1: 1924 // Force bits 23:21 to 0 1925 newVal = val & ~(0x7 << 21); 1926 break; 1927 case MISCREG_L2CTLR: 1928 warn("miscreg L2CTLR (%s) written with %#x. ignored...\n", 1929 miscRegName[misc_reg], uint32_t(val)); 1930 break; 1931 1932 // Generic Timer registers 1933 case MISCREG_CNTFRQ ... MISCREG_CNTHP_CTL: 1934 case MISCREG_CNTPCT ... MISCREG_CNTHP_CVAL: 1935 case MISCREG_CNTKCTL_EL1 ... MISCREG_CNTV_CVAL_EL0: 1936 case MISCREG_CNTVOFF_EL2 ... MISCREG_CNTPS_CVAL_EL1: 1937 getGenericTimer(tc).setMiscReg(misc_reg, newVal); 1938 break; 1939 } 1940 } 1941 setMiscRegNoEffect(misc_reg, newVal); 1942} 1943 1944BaseISADevice & 1945ISA::getGenericTimer(ThreadContext *tc) 1946{ 1947 // We only need to create an ISA interface the first time we try 1948 // to access the timer. 1949 if (timer) 1950 return *timer.get(); 1951 1952 assert(system); 1953 GenericTimer *generic_timer(system->getGenericTimer()); 1954 if (!generic_timer) { 1955 panic("Trying to get a generic timer from a system that hasn't " 1956 "been configured to use a generic timer.\n"); 1957 } 1958 1959 timer.reset(new GenericTimerISA(*generic_timer, tc->contextId())); 1960 return *timer.get(); 1961} 1962 1963} 1964 1965ArmISA::ISA * 1966ArmISAParams::create() 1967{ 1968 return new ArmISA::ISA(this); 1969} 1970