gic_v3_cpu_interface.cc revision 14237:fa3f5209a8e8
1/* 2 * Copyright (c) 2019 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) 2018 Metempsy Technology Consulting 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: Jairo Balart 41 */ 42 43#include "dev/arm/gic_v3_cpu_interface.hh" 44 45#include "arch/arm/isa.hh" 46#include "debug/GIC.hh" 47#include "dev/arm/gic_v3.hh" 48#include "dev/arm/gic_v3_distributor.hh" 49#include "dev/arm/gic_v3_redistributor.hh" 50 51const uint8_t Gicv3CPUInterface::GIC_MIN_BPR; 52const uint8_t Gicv3CPUInterface::GIC_MIN_BPR_NS; 53 54Gicv3CPUInterface::Gicv3CPUInterface(Gicv3 * gic, uint32_t cpu_id) 55 : BaseISADevice(), 56 gic(gic), 57 redistributor(nullptr), 58 distributor(nullptr), 59 cpuId(cpu_id) 60{ 61} 62 63void 64Gicv3CPUInterface::init() 65{ 66 redistributor = gic->getRedistributor(cpuId); 67 distributor = gic->getDistributor(); 68} 69 70void 71Gicv3CPUInterface::initState() 72{ 73 reset(); 74} 75 76void 77Gicv3CPUInterface::reset() 78{ 79 hppi.prio = 0xff; 80} 81 82void 83Gicv3CPUInterface::setThreadContext(ThreadContext *tc) 84{ 85 maintenanceInterrupt = gic->params()->maint_int->get(tc); 86} 87 88bool 89Gicv3CPUInterface::getHCREL2FMO() const 90{ 91 HCR hcr = isa->readMiscRegNoEffect(MISCREG_HCR_EL2); 92 93 if (hcr.tge && hcr.e2h) { 94 return false; 95 } else if (hcr.tge) { 96 return true; 97 } else { 98 return hcr.fmo; 99 } 100} 101 102bool 103Gicv3CPUInterface::getHCREL2IMO() const 104{ 105 HCR hcr = isa->readMiscRegNoEffect(MISCREG_HCR_EL2); 106 107 if (hcr.tge && hcr.e2h) { 108 return false; 109 } else if (hcr.tge) { 110 return true; 111 } else { 112 return hcr.imo; 113 } 114} 115 116RegVal 117Gicv3CPUInterface::readMiscReg(int misc_reg) 118{ 119 RegVal value = isa->readMiscRegNoEffect(misc_reg); 120 bool hcr_fmo = getHCREL2FMO(); 121 bool hcr_imo = getHCREL2IMO(); 122 123 switch (misc_reg) { 124 // Active Priorities Group 1 Registers 125 case MISCREG_ICC_AP1R0: 126 case MISCREG_ICC_AP1R0_EL1: { 127 if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 128 return isa->readMiscRegNoEffect(MISCREG_ICV_AP1R0_EL1); 129 } 130 131 break; 132 } 133 134 case MISCREG_ICC_AP1R1: 135 case MISCREG_ICC_AP1R1_EL1: 136 137 // only implemented if supporting 6 or more bits of priority 138 case MISCREG_ICC_AP1R2: 139 case MISCREG_ICC_AP1R2_EL1: 140 141 // only implemented if supporting 7 or more bits of priority 142 case MISCREG_ICC_AP1R3: 143 case MISCREG_ICC_AP1R3_EL1: 144 // only implemented if supporting 7 or more bits of priority 145 return 0; 146 147 // Active Priorities Group 0 Registers 148 case MISCREG_ICC_AP0R0: 149 case MISCREG_ICC_AP0R0_EL1: { 150 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 151 return isa->readMiscRegNoEffect(MISCREG_ICV_AP0R0_EL1); 152 } 153 154 break; 155 } 156 157 case MISCREG_ICC_AP0R1: 158 case MISCREG_ICC_AP0R1_EL1: 159 160 // only implemented if supporting 6 or more bits of priority 161 case MISCREG_ICC_AP0R2: 162 case MISCREG_ICC_AP0R2_EL1: 163 164 // only implemented if supporting 7 or more bits of priority 165 case MISCREG_ICC_AP0R3: 166 case MISCREG_ICC_AP0R3_EL1: 167 // only implemented if supporting 7 or more bits of priority 168 return 0; 169 170 // Interrupt Group 0 Enable register EL1 171 case MISCREG_ICC_IGRPEN0: 172 case MISCREG_ICC_IGRPEN0_EL1: { 173 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 174 return readMiscReg(MISCREG_ICV_IGRPEN0_EL1); 175 } 176 177 break; 178 } 179 180 case MISCREG_ICV_IGRPEN0_EL1: { 181 ICH_VMCR_EL2 ich_vmcr_el2 = 182 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 183 value = ich_vmcr_el2.VENG0; 184 break; 185 } 186 187 // Interrupt Group 1 Enable register EL1 188 case MISCREG_ICC_IGRPEN1: 189 case MISCREG_ICC_IGRPEN1_EL1: { 190 if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 191 return readMiscReg(MISCREG_ICV_IGRPEN1_EL1); 192 } 193 194 break; 195 } 196 197 case MISCREG_ICV_IGRPEN1_EL1: { 198 ICH_VMCR_EL2 ich_vmcr_el2 = 199 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 200 value = ich_vmcr_el2.VENG1; 201 break; 202 } 203 204 // Interrupt Group 1 Enable register EL3 205 case MISCREG_ICC_MGRPEN1: 206 case MISCREG_ICC_IGRPEN1_EL3: 207 break; 208 209 // Running Priority Register 210 case MISCREG_ICC_RPR: 211 case MISCREG_ICC_RPR_EL1: { 212 if ((currEL() == EL1) && !inSecureState() && 213 (hcr_imo || hcr_fmo)) { 214 return readMiscReg(MISCREG_ICV_RPR_EL1); 215 } 216 217 uint8_t rprio = highestActivePriority(); 218 219 if (haveEL(EL3) && !inSecureState() && 220 (isa->readMiscRegNoEffect(MISCREG_SCR_EL3) & (1U << 2))) { 221 // Spec section 4.8.1 222 // For Non-secure access to ICC_RPR_EL1 when SCR_EL3.FIQ == 1 223 if ((rprio & 0x80) == 0) { 224 // If the current priority mask value is in the range of 225 // 0x00-0x7F a read access returns the value 0x0 226 rprio = 0; 227 } else if (rprio != 0xff) { 228 // If the current priority mask value is in the range of 229 // 0x80-0xFF a read access returns the Non-secure read of 230 // the current value 231 rprio = (rprio << 1) & 0xff; 232 } 233 } 234 235 value = rprio; 236 break; 237 } 238 239 // Virtual Running Priority Register 240 case MISCREG_ICV_RPR_EL1: { 241 value = virtualHighestActivePriority(); 242 break; 243 } 244 245 // Highest Priority Pending Interrupt Register 0 246 case MISCREG_ICC_HPPIR0: 247 case MISCREG_ICC_HPPIR0_EL1: { 248 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 249 return readMiscReg(MISCREG_ICV_HPPIR0_EL1); 250 } 251 252 value = getHPPIR0(); 253 break; 254 } 255 256 // Virtual Highest Priority Pending Interrupt Register 0 257 case MISCREG_ICV_HPPIR0_EL1: { 258 value = Gicv3::INTID_SPURIOUS; 259 int lr_idx = getHPPVILR(); 260 261 if (lr_idx >= 0) { 262 ICH_LR_EL2 ich_lr_el2 = 263 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 264 Gicv3::GroupId group = 265 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S; 266 267 if (group == Gicv3::G0S) { 268 value = ich_lr_el2.vINTID; 269 } 270 } 271 272 break; 273 } 274 275 // Highest Priority Pending Interrupt Register 1 276 case MISCREG_ICC_HPPIR1: 277 case MISCREG_ICC_HPPIR1_EL1: { 278 if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 279 return readMiscReg(MISCREG_ICV_HPPIR1_EL1); 280 } 281 282 value = getHPPIR1(); 283 break; 284 } 285 286 // Virtual Highest Priority Pending Interrupt Register 1 287 case MISCREG_ICV_HPPIR1_EL1: { 288 value = Gicv3::INTID_SPURIOUS; 289 int lr_idx = getHPPVILR(); 290 291 if (lr_idx >= 0) { 292 ICH_LR_EL2 ich_lr_el2 = 293 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 294 Gicv3::GroupId group = 295 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S; 296 297 if (group == Gicv3::G1NS) { 298 value = ich_lr_el2.vINTID; 299 } 300 } 301 302 break; 303 } 304 305 // Binary Point Register 0 306 case MISCREG_ICC_BPR0: 307 case MISCREG_ICC_BPR0_EL1: { 308 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 309 return readMiscReg(MISCREG_ICV_BPR0_EL1); 310 } 311 312 value = isa->readMiscRegNoEffect(MISCREG_ICC_BPR0_EL1); 313 break; 314 } 315 316 // Binary Point Register 1 317 case MISCREG_ICC_BPR1: 318 case MISCREG_ICC_BPR1_EL1: { 319 value = bpr1(isSecureBelowEL3() ? Gicv3::G1S : Gicv3::G1NS); 320 break; 321 } 322 323 // Virtual Binary Point Register 0 324 case MISCREG_ICV_BPR0_EL1: { 325 ICH_VMCR_EL2 ich_vmcr_el2 = 326 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 327 328 value = ich_vmcr_el2.VBPR0; 329 break; 330 } 331 332 // Virtual Binary Point Register 1 333 case MISCREG_ICV_BPR1_EL1: { 334 ICH_VMCR_EL2 ich_vmcr_el2 = 335 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 336 337 if (ich_vmcr_el2.VCBPR) { 338 // bpr0 + 1 saturated to 7, WI 339 value = ich_vmcr_el2.VBPR0 + 1; 340 value = value < 7 ? value : 7; 341 } else { 342 value = ich_vmcr_el2.VBPR1; 343 } 344 345 break; 346 } 347 348 // Interrupt Priority Mask Register 349 case MISCREG_ICC_PMR: 350 case MISCREG_ICC_PMR_EL1: 351 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) { 352 return readMiscReg(MISCREG_ICV_PMR_EL1); 353 } 354 355 if (haveEL(EL3) && !inSecureState() && 356 (isa->readMiscRegNoEffect(MISCREG_SCR_EL3) & (1U << 2))) { 357 // Spec section 4.8.1 358 // For Non-secure access to ICC_PMR_EL1 when SCR_EL3.FIQ == 1: 359 if ((value & 0x80) == 0) { 360 // If the current priority mask value is in the range of 361 // 0x00-0x7F a read access returns the value 0x00. 362 value = 0; 363 } else if (value != 0xff) { 364 // If the current priority mask value is in the range of 365 // 0x80-0xFF a read access returns the Non-secure read of the 366 // current value. 367 value = (value << 1) & 0xff; 368 } 369 } 370 371 break; 372 373 case MISCREG_ICV_PMR_EL1: { // Priority Mask Register 374 ICH_VMCR_EL2 ich_vmcr_el2 = 375 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 376 377 value = ich_vmcr_el2.VPMR; 378 break; 379 } 380 381 // Interrupt Acknowledge Register 0 382 case MISCREG_ICC_IAR0: 383 case MISCREG_ICC_IAR0_EL1: { 384 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 385 return readMiscReg(MISCREG_ICV_IAR0_EL1); 386 } 387 388 uint32_t int_id; 389 390 if (hppiCanPreempt()) { 391 int_id = getHPPIR0(); 392 393 // avoid activation for special interrupts 394 if (int_id < Gicv3::INTID_SECURE || 395 int_id >= Gicv3Redistributor::SMALLEST_LPI_ID) { 396 activateIRQ(int_id, hppi.group); 397 } 398 } else { 399 int_id = Gicv3::INTID_SPURIOUS; 400 } 401 402 value = int_id; 403 break; 404 } 405 406 // Virtual Interrupt Acknowledge Register 0 407 case MISCREG_ICV_IAR0_EL1: { 408 int lr_idx = getHPPVILR(); 409 uint32_t int_id = Gicv3::INTID_SPURIOUS; 410 411 if (lr_idx >= 0) { 412 ICH_LR_EL2 ich_lr_el2 = 413 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 414 415 if (!ich_lr_el2.Group && hppviCanPreempt(lr_idx)) { 416 int_id = ich_lr_el2.vINTID; 417 418 if (int_id < Gicv3::INTID_SECURE || 419 int_id > Gicv3::INTID_SPURIOUS) { 420 virtualActivateIRQ(lr_idx); 421 } else { 422 // Bogus... Pseudocode says: 423 // - Move from pending to invalid... 424 // - Return de bogus id... 425 ich_lr_el2.State = ICH_LR_EL2_STATE_INVALID; 426 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, 427 ich_lr_el2); 428 } 429 } 430 } 431 432 value = int_id; 433 virtualUpdate(); 434 break; 435 } 436 437 // Interrupt Acknowledge Register 1 438 case MISCREG_ICC_IAR1: 439 case MISCREG_ICC_IAR1_EL1: { 440 if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 441 return readMiscReg(MISCREG_ICV_IAR1_EL1); 442 } 443 444 uint32_t int_id; 445 446 if (hppiCanPreempt()) { 447 int_id = getHPPIR1(); 448 449 // avoid activation for special interrupts 450 if (int_id < Gicv3::INTID_SECURE || 451 int_id >= Gicv3Redistributor::SMALLEST_LPI_ID) { 452 activateIRQ(int_id, hppi.group); 453 } 454 } else { 455 int_id = Gicv3::INTID_SPURIOUS; 456 } 457 458 value = int_id; 459 break; 460 } 461 462 // Virtual Interrupt Acknowledge Register 1 463 case MISCREG_ICV_IAR1_EL1: { 464 int lr_idx = getHPPVILR(); 465 uint32_t int_id = Gicv3::INTID_SPURIOUS; 466 467 if (lr_idx >= 0) { 468 ICH_LR_EL2 ich_lr_el2 = 469 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 470 471 if (ich_lr_el2.Group && hppviCanPreempt(lr_idx)) { 472 int_id = ich_lr_el2.vINTID; 473 474 if (int_id < Gicv3::INTID_SECURE || 475 int_id > Gicv3::INTID_SPURIOUS) { 476 virtualActivateIRQ(lr_idx); 477 } else { 478 // Bogus... Pseudocode says: 479 // - Move from pending to invalid... 480 // - Return de bogus id... 481 ich_lr_el2.State = ICH_LR_EL2_STATE_INVALID; 482 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, 483 ich_lr_el2); 484 } 485 } 486 } 487 488 value = int_id; 489 virtualUpdate(); 490 break; 491 } 492 493 // System Register Enable Register EL1 494 case MISCREG_ICC_SRE: 495 case MISCREG_ICC_SRE_EL1: { 496 /* 497 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI) 498 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI) 499 * SRE [0] == 1 (Only system register interface supported, RAO/WI) 500 */ 501 ICC_SRE_EL1 icc_sre_el1 = 0; 502 icc_sre_el1.SRE = 1; 503 icc_sre_el1.DIB = 1; 504 icc_sre_el1.DFB = 1; 505 value = icc_sre_el1; 506 break; 507 } 508 509 // System Register Enable Register EL2 510 case MISCREG_ICC_HSRE: 511 case MISCREG_ICC_SRE_EL2: { 512 /* 513 * Enable [3] == 1 514 * (EL1 accesses to ICC_SRE_EL1 do not trap to EL2, RAO/WI) 515 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI) 516 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI) 517 * SRE [0] == 1 (Only system register interface supported, RAO/WI) 518 */ 519 ICC_SRE_EL2 icc_sre_el2 = 0; 520 icc_sre_el2.SRE = 1; 521 icc_sre_el2.DIB = 1; 522 icc_sre_el2.DFB = 1; 523 icc_sre_el2.Enable = 1; 524 value = icc_sre_el2; 525 break; 526 } 527 528 // System Register Enable Register EL3 529 case MISCREG_ICC_MSRE: 530 case MISCREG_ICC_SRE_EL3: { 531 /* 532 * Enable [3] == 1 533 * (EL1 accesses to ICC_SRE_EL1 do not trap to EL3. 534 * EL2 accesses to ICC_SRE_EL1 and ICC_SRE_EL2 do not trap to EL3. 535 * RAO/WI) 536 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI) 537 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI) 538 * SRE [0] == 1 (Only system register interface supported, RAO/WI) 539 */ 540 ICC_SRE_EL3 icc_sre_el3 = 0; 541 icc_sre_el3.SRE = 1; 542 icc_sre_el3.DIB = 1; 543 icc_sre_el3.DFB = 1; 544 icc_sre_el3.Enable = 1; 545 value = icc_sre_el3; 546 break; 547 } 548 549 // Control Register 550 case MISCREG_ICC_CTLR: 551 case MISCREG_ICC_CTLR_EL1: { 552 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) { 553 return readMiscReg(MISCREG_ICV_CTLR_EL1); 554 } 555 556 // Enforce value for RO bits 557 // ExtRange [19], INTIDs in the range 1024..8191 not supported 558 // RSS [18], SGIs with affinity level 0 values of 0-255 are supported 559 // A3V [15], supports non-zero values of the Aff3 field in SGI 560 // generation System registers 561 // SEIS [14], does not support generation of SEIs (deprecated) 562 // IDbits [13:11], 001 = 24 bits | 000 = 16 bits 563 // PRIbits [10:8], number of priority bits implemented, minus one 564 ICC_CTLR_EL1 icc_ctlr_el1 = value; 565 icc_ctlr_el1.ExtRange = 0; 566 icc_ctlr_el1.RSS = 1; 567 icc_ctlr_el1.A3V = 1; 568 icc_ctlr_el1.SEIS = 0; 569 icc_ctlr_el1.IDbits = 1; 570 icc_ctlr_el1.PRIbits = PRIORITY_BITS - 1; 571 value = icc_ctlr_el1; 572 break; 573 } 574 575 // Virtual Control Register 576 case MISCREG_ICV_CTLR_EL1: { 577 ICV_CTLR_EL1 icv_ctlr_el1 = value; 578 icv_ctlr_el1.RSS = 0; 579 icv_ctlr_el1.A3V = 1; 580 icv_ctlr_el1.SEIS = 0; 581 icv_ctlr_el1.IDbits = 1; 582 icv_ctlr_el1.PRIbits = 7; 583 value = icv_ctlr_el1; 584 break; 585 } 586 587 // Control Register 588 case MISCREG_ICC_MCTLR: 589 case MISCREG_ICC_CTLR_EL3: { 590 // Enforce value for RO bits 591 // ExtRange [19], INTIDs in the range 1024..8191 not supported 592 // RSS [18], SGIs with affinity level 0 values of 0-255 are supported 593 // nDS [17], supports disabling of security 594 // A3V [15], supports non-zero values of the Aff3 field in SGI 595 // generation System registers 596 // SEIS [14], does not support generation of SEIs (deprecated) 597 // IDbits [13:11], 001 = 24 bits | 000 = 16 bits 598 // PRIbits [10:8], number of priority bits implemented, minus one 599 ICC_CTLR_EL3 icc_ctlr_el3 = value; 600 icc_ctlr_el3.ExtRange = 0; 601 icc_ctlr_el3.RSS = 1; 602 icc_ctlr_el3.nDS = 0; 603 icc_ctlr_el3.A3V = 1; 604 icc_ctlr_el3.SEIS = 0; 605 icc_ctlr_el3.IDbits = 0; 606 icc_ctlr_el3.PRIbits = PRIORITY_BITS - 1; 607 value = icc_ctlr_el3; 608 break; 609 } 610 611 // Hyp Control Register 612 case MISCREG_ICH_HCR: 613 case MISCREG_ICH_HCR_EL2: 614 break; 615 616 // Hyp Active Priorities Group 0 Registers 617 case MISCREG_ICH_AP0R0: 618 case MISCREG_ICH_AP0R0_EL2: 619 break; 620 621 // only implemented if supporting 6 or more bits of priority 622 case MISCREG_ICH_AP0R1: 623 case MISCREG_ICH_AP0R1_EL2: 624 // only implemented if supporting 7 or more bits of priority 625 case MISCREG_ICH_AP0R2: 626 case MISCREG_ICH_AP0R2_EL2: 627 // only implemented if supporting 7 or more bits of priority 628 case MISCREG_ICH_AP0R3: 629 case MISCREG_ICH_AP0R3_EL2: 630 // Unimplemented registers are RAZ/WI 631 return 0; 632 633 // Hyp Active Priorities Group 1 Registers 634 case MISCREG_ICH_AP1R0: 635 case MISCREG_ICH_AP1R0_EL2: 636 break; 637 638 // only implemented if supporting 6 or more bits of priority 639 case MISCREG_ICH_AP1R1: 640 case MISCREG_ICH_AP1R1_EL2: 641 // only implemented if supporting 7 or more bits of priority 642 case MISCREG_ICH_AP1R2: 643 case MISCREG_ICH_AP1R2_EL2: 644 // only implemented if supporting 7 or more bits of priority 645 case MISCREG_ICH_AP1R3: 646 case MISCREG_ICH_AP1R3_EL2: 647 // Unimplemented registers are RAZ/WI 648 return 0; 649 650 // Maintenance Interrupt State Register 651 case MISCREG_ICH_MISR: 652 case MISCREG_ICH_MISR_EL2: 653 value = maintenanceInterruptStatus(); 654 break; 655 656 // VGIC Type Register 657 case MISCREG_ICH_VTR: 658 case MISCREG_ICH_VTR_EL2: { 659 ICH_VTR_EL2 ich_vtr_el2 = value; 660 661 ich_vtr_el2.ListRegs = VIRTUAL_NUM_LIST_REGS - 1; 662 ich_vtr_el2.A3V = 1; 663 ich_vtr_el2.IDbits = 1; 664 ich_vtr_el2.PREbits = VIRTUAL_PREEMPTION_BITS - 1; 665 ich_vtr_el2.PRIbits = VIRTUAL_PRIORITY_BITS - 1; 666 667 value = ich_vtr_el2; 668 break; 669 } 670 671 // End of Interrupt Status Register 672 case MISCREG_ICH_EISR: 673 case MISCREG_ICH_EISR_EL2: 674 value = eoiMaintenanceInterruptStatus(); 675 break; 676 677 // Empty List Register Status Register 678 case MISCREG_ICH_ELRSR: 679 case MISCREG_ICH_ELRSR_EL2: 680 value = 0; 681 682 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) { 683 ICH_LR_EL2 ich_lr_el2 = 684 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 685 686 if ((ich_lr_el2.State == ICH_LR_EL2_STATE_INVALID) && 687 (ich_lr_el2.HW || !ich_lr_el2.EOI)) { 688 value |= (1 << lr_idx); 689 } 690 } 691 692 break; 693 694 // List Registers 695 case MISCREG_ICH_LRC0 ... MISCREG_ICH_LRC15: 696 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 high half part) 697 value = value >> 32; 698 break; 699 700 // List Registers 701 case MISCREG_ICH_LR0 ... MISCREG_ICH_LR15: 702 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 low half part) 703 value = value & 0xffffffff; 704 break; 705 706 // List Registers 707 case MISCREG_ICH_LR0_EL2 ... MISCREG_ICH_LR15_EL2: 708 break; 709 710 // Virtual Machine Control Register 711 case MISCREG_ICH_VMCR: 712 case MISCREG_ICH_VMCR_EL2: 713 break; 714 715 default: 716 panic("Gicv3CPUInterface::readMiscReg(): unknown register %d (%s)", 717 misc_reg, miscRegName[misc_reg]); 718 } 719 720 DPRINTF(GIC, "Gicv3CPUInterface::readMiscReg(): register %s value %#x\n", 721 miscRegName[misc_reg], value); 722 return value; 723} 724 725void 726Gicv3CPUInterface::setMiscReg(int misc_reg, RegVal val) 727{ 728 bool do_virtual_update = false; 729 DPRINTF(GIC, "Gicv3CPUInterface::setMiscReg(): register %s value %#x\n", 730 miscRegName[misc_reg], val); 731 bool hcr_fmo = getHCREL2FMO(); 732 bool hcr_imo = getHCREL2IMO(); 733 734 switch (misc_reg) { 735 // Active Priorities Group 1 Registers 736 case MISCREG_ICC_AP1R0: 737 case MISCREG_ICC_AP1R0_EL1: 738 if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 739 return isa->setMiscRegNoEffect(MISCREG_ICV_AP1R0_EL1, val); 740 } 741 742 break; 743 744 case MISCREG_ICC_AP1R1: 745 case MISCREG_ICC_AP1R1_EL1: 746 747 // only implemented if supporting 6 or more bits of priority 748 case MISCREG_ICC_AP1R2: 749 case MISCREG_ICC_AP1R2_EL1: 750 751 // only implemented if supporting 7 or more bits of priority 752 case MISCREG_ICC_AP1R3: 753 case MISCREG_ICC_AP1R3_EL1: 754 // only implemented if supporting 7 or more bits of priority 755 break; 756 757 // Active Priorities Group 0 Registers 758 case MISCREG_ICC_AP0R0: 759 case MISCREG_ICC_AP0R0_EL1: 760 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 761 return isa->setMiscRegNoEffect(MISCREG_ICV_AP0R0_EL1, val); 762 } 763 764 break; 765 766 case MISCREG_ICC_AP0R1: 767 case MISCREG_ICC_AP0R1_EL1: 768 769 // only implemented if supporting 6 or more bits of priority 770 case MISCREG_ICC_AP0R2: 771 case MISCREG_ICC_AP0R2_EL1: 772 773 // only implemented if supporting 7 or more bits of priority 774 case MISCREG_ICC_AP0R3: 775 case MISCREG_ICC_AP0R3_EL1: 776 // only implemented if supporting 7 or more bits of priority 777 break; 778 779 // End Of Interrupt Register 0 780 case MISCREG_ICC_EOIR0: 781 case MISCREG_ICC_EOIR0_EL1: { // End Of Interrupt Register 0 782 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 783 return setMiscReg(MISCREG_ICV_EOIR0_EL1, val); 784 } 785 786 int int_id = val & 0xffffff; 787 788 // avoid activation for special interrupts 789 if (int_id >= Gicv3::INTID_SECURE && 790 int_id <= Gicv3::INTID_SPURIOUS) { 791 return; 792 } 793 794 Gicv3::GroupId group = Gicv3::G0S; 795 796 if (highestActiveGroup() != group) { 797 return; 798 } 799 800 dropPriority(group); 801 802 if (!isEOISplitMode()) { 803 deactivateIRQ(int_id, group); 804 } 805 806 break; 807 } 808 809 // Virtual End Of Interrupt Register 0 810 case MISCREG_ICV_EOIR0_EL1: { 811 int int_id = val & 0xffffff; 812 813 // avoid deactivation for special interrupts 814 if (int_id >= Gicv3::INTID_SECURE && 815 int_id <= Gicv3::INTID_SPURIOUS) { 816 return; 817 } 818 819 uint8_t drop_prio = virtualDropPriority(); 820 821 if (drop_prio == 0xff) { 822 return; 823 } 824 825 int lr_idx = virtualFindActive(int_id); 826 827 if (lr_idx < 0) { 828 // No LR found matching 829 virtualIncrementEOICount(); 830 } else { 831 ICH_LR_EL2 ich_lr_el2 = 832 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 833 Gicv3::GroupId lr_group = 834 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S; 835 uint8_t lr_group_prio = ich_lr_el2.Priority & 0xf8; 836 837 if (lr_group == Gicv3::G0S && lr_group_prio == drop_prio) { 838 //if (!virtualIsEOISplitMode()) 839 { 840 virtualDeactivateIRQ(lr_idx); 841 } 842 } 843 } 844 845 virtualUpdate(); 846 break; 847 } 848 849 // End Of Interrupt Register 1 850 case MISCREG_ICC_EOIR1: 851 case MISCREG_ICC_EOIR1_EL1: { 852 if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 853 return setMiscReg(MISCREG_ICV_EOIR1_EL1, val); 854 } 855 856 int int_id = val & 0xffffff; 857 858 // avoid deactivation for special interrupts 859 if (int_id >= Gicv3::INTID_SECURE && 860 int_id <= Gicv3::INTID_SPURIOUS) { 861 return; 862 } 863 864 Gicv3::GroupId group = inSecureState() ? Gicv3::G1S : Gicv3::G1NS; 865 866 if (highestActiveGroup() == Gicv3::G0S) { 867 return; 868 } 869 870 if (distributor->DS == 0) { 871 if (highestActiveGroup() == Gicv3::G1S && !inSecureState()) { 872 return; 873 } else if (highestActiveGroup() == Gicv3::G1NS && 874 !(!inSecureState() or (currEL() == EL3))) { 875 return; 876 } 877 } 878 879 dropPriority(group); 880 881 if (!isEOISplitMode()) { 882 deactivateIRQ(int_id, group); 883 } 884 885 break; 886 } 887 888 // Virtual End Of Interrupt Register 1 889 case MISCREG_ICV_EOIR1_EL1: { 890 int int_id = val & 0xffffff; 891 892 // avoid deactivation for special interrupts 893 if (int_id >= Gicv3::INTID_SECURE && 894 int_id <= Gicv3::INTID_SPURIOUS) { 895 return; 896 } 897 898 uint8_t drop_prio = virtualDropPriority(); 899 900 if (drop_prio == 0xff) { 901 return; 902 } 903 904 int lr_idx = virtualFindActive(int_id); 905 906 if (lr_idx < 0) { 907 // No matching LR found 908 virtualIncrementEOICount(); 909 } else { 910 ICH_LR_EL2 ich_lr_el2 = 911 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 912 Gicv3::GroupId lr_group = 913 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S; 914 uint8_t lr_group_prio = ich_lr_el2.Priority & 0xf8; 915 916 if (lr_group == Gicv3::G1NS && lr_group_prio == drop_prio) { 917 if (!virtualIsEOISplitMode()) { 918 virtualDeactivateIRQ(lr_idx); 919 } 920 } 921 } 922 923 virtualUpdate(); 924 break; 925 } 926 927 // Deactivate Interrupt Register 928 case MISCREG_ICC_DIR: 929 case MISCREG_ICC_DIR_EL1: { 930 if ((currEL() == EL1) && !inSecureState() && 931 (hcr_imo || hcr_fmo)) { 932 return setMiscReg(MISCREG_ICV_DIR_EL1, val); 933 } 934 935 int int_id = val & 0xffffff; 936 937 // The following checks are as per spec pseudocode 938 // aarch64/support/ICC_DIR_EL1 939 940 // Check for spurious ID 941 if (int_id >= Gicv3::INTID_SECURE) { 942 return; 943 } 944 945 // EOI mode is not set, so don't deactivate 946 if (!isEOISplitMode()) { 947 return; 948 } 949 950 Gicv3::GroupId group = 951 int_id >= 32 ? distributor->getIntGroup(int_id) : 952 redistributor->getIntGroup(int_id); 953 bool irq_is_grp0 = group == Gicv3::G0S; 954 bool single_sec_state = distributor->DS; 955 bool irq_is_secure = !single_sec_state && (group != Gicv3::G1NS); 956 SCR scr_el3 = isa->readMiscRegNoEffect(MISCREG_SCR_EL3); 957 bool route_fiq_to_el3 = scr_el3.fiq; 958 bool route_irq_to_el3 = scr_el3.irq; 959 bool route_fiq_to_el2 = hcr_fmo; 960 bool route_irq_to_el2 = hcr_imo; 961 962 switch (currEL()) { 963 case EL3: 964 break; 965 966 case EL2: 967 if (single_sec_state && irq_is_grp0 && !route_fiq_to_el3) { 968 break; 969 } 970 971 if (!irq_is_secure && !irq_is_grp0 && !route_irq_to_el3) { 972 break; 973 } 974 975 return; 976 977 case EL1: 978 if (!isSecureBelowEL3()) { 979 if (single_sec_state && irq_is_grp0 && 980 !route_fiq_to_el3 && !route_fiq_to_el2) { 981 break; 982 } 983 984 if (!irq_is_secure && !irq_is_grp0 && 985 !route_irq_to_el3 && !route_irq_to_el2) { 986 break; 987 } 988 } else { 989 if (irq_is_grp0 && !route_fiq_to_el3) { 990 break; 991 } 992 993 if (!irq_is_grp0 && 994 (!irq_is_secure || !single_sec_state) && 995 !route_irq_to_el3) { 996 break; 997 } 998 } 999 1000 return; 1001 1002 default: 1003 break; 1004 } 1005 1006 deactivateIRQ(int_id, group); 1007 break; 1008 } 1009 1010 // Deactivate Virtual Interrupt Register 1011 case MISCREG_ICV_DIR_EL1: { 1012 int int_id = val & 0xffffff; 1013 1014 // avoid deactivation for special interrupts 1015 if (int_id >= Gicv3::INTID_SECURE && 1016 int_id <= Gicv3::INTID_SPURIOUS) { 1017 return; 1018 } 1019 1020 if (!virtualIsEOISplitMode()) { 1021 return; 1022 } 1023 1024 int lr_idx = virtualFindActive(int_id); 1025 1026 if (lr_idx < 0) { 1027 // No matching LR found 1028 virtualIncrementEOICount(); 1029 } else { 1030 virtualDeactivateIRQ(lr_idx); 1031 } 1032 1033 virtualUpdate(); 1034 break; 1035 } 1036 1037 // Binary Point Register 0 1038 case MISCREG_ICC_BPR0: 1039 case MISCREG_ICC_BPR0_EL1: { 1040 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 1041 return setMiscReg(MISCREG_ICV_BPR0_EL1, val); 1042 } 1043 break; 1044 } 1045 // Binary Point Register 1 1046 case MISCREG_ICC_BPR1: 1047 case MISCREG_ICC_BPR1_EL1: { 1048 if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 1049 return setMiscReg(MISCREG_ICV_BPR1_EL1, val); 1050 } 1051 1052 val &= 0x7; 1053 1054 if (isSecureBelowEL3()) { 1055 // group == Gicv3::G1S 1056 ICC_CTLR_EL1 icc_ctlr_el1_s = 1057 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S); 1058 1059 val = val > GIC_MIN_BPR ? val : GIC_MIN_BPR; 1060 if (haveEL(EL3) && !isEL3OrMon() && icc_ctlr_el1_s.CBPR) { 1061 isa->setMiscRegNoEffect(MISCREG_ICC_BPR0_EL1, val); 1062 } else { 1063 isa->setMiscRegNoEffect(MISCREG_ICC_BPR1_EL1_S, val); 1064 } 1065 return; 1066 } else { 1067 // group == Gicv3::G1NS 1068 ICC_CTLR_EL1 icc_ctlr_el1_ns = 1069 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS); 1070 1071 val = val > GIC_MIN_BPR_NS ? val : GIC_MIN_BPR_NS; 1072 if (haveEL(EL3) && !isEL3OrMon() && icc_ctlr_el1_ns.CBPR) { 1073 // Non secure writes from EL1 and EL2 are ignored 1074 } else { 1075 isa->setMiscRegNoEffect(MISCREG_ICC_BPR1_EL1_NS, val); 1076 } 1077 return; 1078 } 1079 1080 break; 1081 } 1082 1083 // Virtual Binary Point Register 0 1084 case MISCREG_ICV_BPR0_EL1: 1085 // Virtual Binary Point Register 1 1086 case MISCREG_ICV_BPR1_EL1: { 1087 Gicv3::GroupId group = 1088 misc_reg == MISCREG_ICV_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1NS; 1089 ICH_VMCR_EL2 ich_vmcr_el2 = 1090 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 1091 1092 if ((group == Gicv3::G1NS) && ich_vmcr_el2.VCBPR) { 1093 // BPR0 + 1 saturated to 7, WI 1094 return; 1095 } 1096 1097 uint8_t min_VPBR = 7 - VIRTUAL_PREEMPTION_BITS; 1098 1099 if (group != Gicv3::G0S) { 1100 min_VPBR++; 1101 } 1102 1103 if (val < min_VPBR) { 1104 val = min_VPBR; 1105 } 1106 1107 if (group == Gicv3::G0S) { 1108 ich_vmcr_el2.VBPR0 = val; 1109 } else { 1110 ich_vmcr_el2.VBPR1 = val; 1111 } 1112 1113 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2); 1114 do_virtual_update = true; 1115 break; 1116 } 1117 1118 // Control Register EL1 1119 case MISCREG_ICC_CTLR: 1120 case MISCREG_ICC_CTLR_EL1: { 1121 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) { 1122 return setMiscReg(MISCREG_ICV_CTLR_EL1, val); 1123 } 1124 1125 /* 1126 * ExtRange is RO. 1127 * RSS is RO. 1128 * A3V is RO. 1129 * SEIS is RO. 1130 * IDbits is RO. 1131 * PRIbits is RO. 1132 */ 1133 ICC_CTLR_EL1 requested_icc_ctlr_el1 = val; 1134 ICC_CTLR_EL1 icc_ctlr_el1 = 1135 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1); 1136 1137 ICC_CTLR_EL3 icc_ctlr_el3 = 1138 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3); 1139 1140 // The following could be refactored but it is following 1141 // spec description section 9.2.6 point by point. 1142 1143 // PMHE 1144 if (haveEL(EL3)) { 1145 // PMHE is alias of ICC_CTLR_EL3.PMHE 1146 1147 if (distributor->DS == 0) { 1148 // PMHE is RO 1149 } else if (distributor->DS == 1) { 1150 // PMHE is RW 1151 icc_ctlr_el1.PMHE = requested_icc_ctlr_el1.PMHE; 1152 icc_ctlr_el3.PMHE = icc_ctlr_el1.PMHE; 1153 } 1154 } else { 1155 // PMHE is RW (by implementation choice) 1156 icc_ctlr_el1.PMHE = requested_icc_ctlr_el1.PMHE; 1157 } 1158 1159 // EOImode 1160 icc_ctlr_el1.EOImode = requested_icc_ctlr_el1.EOImode; 1161 1162 if (inSecureState()) { 1163 // EOIMode is alias of ICC_CTLR_EL3.EOImode_EL1S 1164 icc_ctlr_el3.EOImode_EL1S = icc_ctlr_el1.EOImode; 1165 } else { 1166 // EOIMode is alias of ICC_CTLR_EL3.EOImode_EL1NS 1167 icc_ctlr_el3.EOImode_EL1NS = icc_ctlr_el1.EOImode; 1168 } 1169 1170 // CBPR 1171 if (haveEL(EL3)) { 1172 // CBPR is alias of ICC_CTLR_EL3.CBPR_EL1{S,NS} 1173 1174 if (distributor->DS == 0) { 1175 // CBPR is RO 1176 } else { 1177 // CBPR is RW 1178 icc_ctlr_el1.CBPR = requested_icc_ctlr_el1.CBPR; 1179 1180 if (inSecureState()) { 1181 icc_ctlr_el3.CBPR_EL1S = icc_ctlr_el1.CBPR; 1182 } else { 1183 icc_ctlr_el3.CBPR_EL1NS = icc_ctlr_el1.CBPR; 1184 } 1185 } 1186 } else { 1187 // CBPR is RW 1188 icc_ctlr_el1.CBPR = requested_icc_ctlr_el1.CBPR; 1189 } 1190 1191 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL3, icc_ctlr_el3); 1192 1193 val = icc_ctlr_el1; 1194 break; 1195 } 1196 1197 // Virtual Control Register 1198 case MISCREG_ICV_CTLR_EL1: { 1199 ICV_CTLR_EL1 requested_icv_ctlr_el1 = val; 1200 ICV_CTLR_EL1 icv_ctlr_el1 = 1201 isa->readMiscRegNoEffect(MISCREG_ICV_CTLR_EL1); 1202 icv_ctlr_el1.EOImode = requested_icv_ctlr_el1.EOImode; 1203 icv_ctlr_el1.CBPR = requested_icv_ctlr_el1.CBPR; 1204 val = icv_ctlr_el1; 1205 1206 // Aliases 1207 // ICV_CTLR_EL1.CBPR aliases ICH_VMCR_EL2.VCBPR. 1208 // ICV_CTLR_EL1.EOImode aliases ICH_VMCR_EL2.VEOIM. 1209 ICH_VMCR_EL2 ich_vmcr_el2 = 1210 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 1211 ich_vmcr_el2.VCBPR = icv_ctlr_el1.CBPR; 1212 ich_vmcr_el2.VEOIM = icv_ctlr_el1.EOImode; 1213 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2); 1214 break; 1215 } 1216 1217 // Control Register EL3 1218 case MISCREG_ICC_MCTLR: 1219 case MISCREG_ICC_CTLR_EL3: { 1220 /* 1221 * ExtRange is RO. 1222 * RSS is RO. 1223 * nDS is RO. 1224 * A3V is RO. 1225 * SEIS is RO. 1226 * IDbits is RO. 1227 * PRIbits is RO. 1228 * PMHE is RAO/WI, priority-based routing is always used. 1229 */ 1230 ICC_CTLR_EL3 requested_icc_ctlr_el3 = val; 1231 1232 // Aliases 1233 if (haveEL(EL3)) 1234 { 1235 ICC_CTLR_EL1 icc_ctlr_el1_s = 1236 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S); 1237 ICC_CTLR_EL1 icc_ctlr_el1_ns = 1238 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS); 1239 1240 // ICC_CTLR_EL1(NS).EOImode is an alias of 1241 // ICC_CTLR_EL3.EOImode_EL1NS 1242 icc_ctlr_el1_ns.EOImode = requested_icc_ctlr_el3.EOImode_EL1NS; 1243 // ICC_CTLR_EL1(S).EOImode is an alias of 1244 // ICC_CTLR_EL3.EOImode_EL1S 1245 icc_ctlr_el1_s.EOImode = requested_icc_ctlr_el3.EOImode_EL1S; 1246 // ICC_CTLR_EL1(NS).CBPR is an alias of ICC_CTLR_EL3.CBPR_EL1NS 1247 icc_ctlr_el1_ns.CBPR = requested_icc_ctlr_el3.CBPR_EL1NS; 1248 // ICC_CTLR_EL1(S).CBPR is an alias of ICC_CTLR_EL3.CBPR_EL1S 1249 icc_ctlr_el1_s.CBPR = requested_icc_ctlr_el3.CBPR_EL1S; 1250 1251 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S, icc_ctlr_el1_s); 1252 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS, 1253 icc_ctlr_el1_ns); 1254 } 1255 1256 ICC_CTLR_EL3 icc_ctlr_el3 = 1257 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3); 1258 1259 icc_ctlr_el3.RM = requested_icc_ctlr_el3.RM; 1260 icc_ctlr_el3.EOImode_EL1NS = requested_icc_ctlr_el3.EOImode_EL1NS; 1261 icc_ctlr_el3.EOImode_EL1S = requested_icc_ctlr_el3.EOImode_EL1S; 1262 icc_ctlr_el3.EOImode_EL3 = requested_icc_ctlr_el3.EOImode_EL3; 1263 icc_ctlr_el3.CBPR_EL1NS = requested_icc_ctlr_el3.CBPR_EL1NS; 1264 icc_ctlr_el3.CBPR_EL1S = requested_icc_ctlr_el3.CBPR_EL1S; 1265 1266 val = icc_ctlr_el3; 1267 break; 1268 } 1269 1270 // Priority Mask Register 1271 case MISCREG_ICC_PMR: 1272 case MISCREG_ICC_PMR_EL1: { 1273 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) { 1274 return setMiscReg(MISCREG_ICV_PMR_EL1, val); 1275 } 1276 1277 val &= 0xff; 1278 SCR scr_el3 = isa->readMiscRegNoEffect(MISCREG_SCR_EL3); 1279 1280 if (haveEL(EL3) && !inSecureState() && (scr_el3.fiq)) { 1281 // Spec section 4.8.1 1282 // For Non-secure access to ICC_PMR_EL1 SCR_EL3.FIQ == 1: 1283 RegVal old_icc_pmr_el1 = 1284 isa->readMiscRegNoEffect(MISCREG_ICC_PMR_EL1); 1285 1286 if (!(old_icc_pmr_el1 & 0x80)) { 1287 // If the current priority mask value is in the range of 1288 // 0x00-0x7F then WI 1289 return; 1290 } 1291 1292 // If the current priority mask value is in the range of 1293 // 0x80-0xFF then a write access to ICC_PMR_EL1 succeeds, 1294 // based on the Non-secure read of the priority mask value 1295 // written to the register. 1296 1297 val = (val >> 1) | 0x80; 1298 } 1299 1300 val &= ~0U << (8 - PRIORITY_BITS); 1301 break; 1302 } 1303 1304 case MISCREG_ICV_PMR_EL1: { // Priority Mask Register 1305 ICH_VMCR_EL2 ich_vmcr_el2 = 1306 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 1307 ich_vmcr_el2.VPMR = val & 0xff; 1308 1309 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2); 1310 virtualUpdate(); 1311 return; 1312 } 1313 1314 // Interrupt Group 0 Enable Register EL1 1315 case MISCREG_ICC_IGRPEN0: 1316 case MISCREG_ICC_IGRPEN0_EL1: { 1317 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 1318 return setMiscReg(MISCREG_ICV_IGRPEN0_EL1, val); 1319 } 1320 1321 break; 1322 } 1323 1324 // Virtual Interrupt Group 0 Enable register 1325 case MISCREG_ICV_IGRPEN0_EL1: { 1326 bool enable = val & 0x1; 1327 ICH_VMCR_EL2 ich_vmcr_el2 = 1328 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 1329 ich_vmcr_el2.VENG0 = enable; 1330 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2); 1331 virtualUpdate(); 1332 return; 1333 } 1334 1335 // Interrupt Group 1 Enable register EL1 1336 case MISCREG_ICC_IGRPEN1: 1337 case MISCREG_ICC_IGRPEN1_EL1: { 1338 if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 1339 return setMiscReg(MISCREG_ICV_IGRPEN1_EL1, val); 1340 } 1341 1342 if (haveEL(EL3)) { 1343 ICC_IGRPEN1_EL1 icc_igrpen1_el1 = val; 1344 ICC_IGRPEN1_EL3 icc_igrpen1_el3 = 1345 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL3); 1346 1347 if (inSecureState()) { 1348 // Enable is RW alias of ICC_IGRPEN1_EL3.EnableGrp1S 1349 icc_igrpen1_el3.EnableGrp1S = icc_igrpen1_el1.Enable; 1350 } else { 1351 // Enable is RW alias of ICC_IGRPEN1_EL3.EnableGrp1NS 1352 icc_igrpen1_el3.EnableGrp1NS = icc_igrpen1_el1.Enable; 1353 } 1354 1355 isa->setMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL3, 1356 icc_igrpen1_el3); 1357 } 1358 1359 break; 1360 } 1361 1362 // Virtual Interrupt Group 1 Enable register 1363 case MISCREG_ICV_IGRPEN1_EL1: { 1364 bool enable = val & 0x1; 1365 ICH_VMCR_EL2 ich_vmcr_el2 = 1366 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 1367 ich_vmcr_el2.VENG1 = enable; 1368 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2); 1369 virtualUpdate(); 1370 return; 1371 } 1372 1373 // Interrupt Group 1 Enable register 1374 case MISCREG_ICC_MGRPEN1: 1375 case MISCREG_ICC_IGRPEN1_EL3: { 1376 ICC_IGRPEN1_EL3 icc_igrpen1_el3 = val; 1377 ICC_IGRPEN1_EL1 icc_igrpen1_el1 = 1378 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1); 1379 1380 if (inSecureState()) { 1381 // ICC_IGRPEN1_EL1.Enable is RW alias of EnableGrp1S 1382 icc_igrpen1_el1.Enable = icc_igrpen1_el3.EnableGrp1S; 1383 } else { 1384 // ICC_IGRPEN1_EL1.Enable is RW alias of EnableGrp1NS 1385 icc_igrpen1_el1.Enable = icc_igrpen1_el3.EnableGrp1NS; 1386 } 1387 1388 isa->setMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1, icc_igrpen1_el1); 1389 break; 1390 } 1391 1392 // Software Generated Interrupt Group 0 Register 1393 case MISCREG_ICC_SGI0R: 1394 case MISCREG_ICC_SGI0R_EL1: 1395 generateSGI(val, Gicv3::G0S); 1396 break; 1397 1398 // Software Generated Interrupt Group 1 Register 1399 case MISCREG_ICC_SGI1R: 1400 case MISCREG_ICC_SGI1R_EL1: { 1401 Gicv3::GroupId group = inSecureState() ? Gicv3::G1S : Gicv3::G1NS; 1402 1403 generateSGI(val, group); 1404 break; 1405 } 1406 1407 // Alias Software Generated Interrupt Group 1 Register 1408 case MISCREG_ICC_ASGI1R: 1409 case MISCREG_ICC_ASGI1R_EL1: { 1410 Gicv3::GroupId group = inSecureState() ? Gicv3::G1NS : Gicv3::G1S; 1411 1412 generateSGI(val, group); 1413 break; 1414 } 1415 1416 // System Register Enable Register EL1 1417 case MISCREG_ICC_SRE: 1418 case MISCREG_ICC_SRE_EL1: 1419 // System Register Enable Register EL2 1420 case MISCREG_ICC_HSRE: 1421 case MISCREG_ICC_SRE_EL2: 1422 // System Register Enable Register EL3 1423 case MISCREG_ICC_MSRE: 1424 case MISCREG_ICC_SRE_EL3: 1425 // All bits are RAO/WI 1426 return; 1427 1428 // Hyp Control Register 1429 case MISCREG_ICH_HCR: 1430 case MISCREG_ICH_HCR_EL2: { 1431 ICH_HCR_EL2 requested_ich_hcr_el2 = val; 1432 ICH_HCR_EL2 ich_hcr_el2 = 1433 isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2); 1434 1435 if (requested_ich_hcr_el2.EOIcount >= ich_hcr_el2.EOIcount) 1436 { 1437 // EOIcount - Permitted behaviors are: 1438 // - Increment EOIcount. 1439 // - Leave EOIcount unchanged. 1440 ich_hcr_el2.EOIcount = requested_ich_hcr_el2.EOIcount; 1441 } 1442 1443 ich_hcr_el2.TDIR = requested_ich_hcr_el2.TDIR; 1444 ich_hcr_el2.TSEI = requested_ich_hcr_el2.TSEI; 1445 ich_hcr_el2.TALL1 = requested_ich_hcr_el2.TALL1;; 1446 ich_hcr_el2.TALL0 = requested_ich_hcr_el2.TALL0;; 1447 ich_hcr_el2.TC = requested_ich_hcr_el2.TC; 1448 ich_hcr_el2.VGrp1DIE = requested_ich_hcr_el2.VGrp1DIE; 1449 ich_hcr_el2.VGrp1EIE = requested_ich_hcr_el2.VGrp1EIE; 1450 ich_hcr_el2.VGrp0DIE = requested_ich_hcr_el2.VGrp0DIE; 1451 ich_hcr_el2.VGrp0EIE = requested_ich_hcr_el2.VGrp0EIE; 1452 ich_hcr_el2.NPIE = requested_ich_hcr_el2.NPIE; 1453 ich_hcr_el2.LRENPIE = requested_ich_hcr_el2.LRENPIE; 1454 ich_hcr_el2.UIE = requested_ich_hcr_el2.UIE; 1455 ich_hcr_el2.En = requested_ich_hcr_el2.En; 1456 val = ich_hcr_el2; 1457 do_virtual_update = true; 1458 break; 1459 } 1460 1461 // List Registers 1462 case MISCREG_ICH_LRC0 ... MISCREG_ICH_LRC15: { 1463 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 high half part) 1464 ICH_LRC requested_ich_lrc = val; 1465 ICH_LRC ich_lrc = isa->readMiscRegNoEffect(misc_reg); 1466 1467 ich_lrc.State = requested_ich_lrc.State; 1468 ich_lrc.HW = requested_ich_lrc.HW; 1469 ich_lrc.Group = requested_ich_lrc.Group; 1470 1471 // Priority, bits [23:16] 1472 // At least five bits must be implemented. 1473 // Unimplemented bits are RES0 and start from bit[16] up to bit[18]. 1474 // We implement 5 bits. 1475 ich_lrc.Priority = (requested_ich_lrc.Priority & 0xf8) | 1476 (ich_lrc.Priority & 0x07); 1477 1478 // pINTID, bits [12:0] 1479 // When ICH_LR<n>.HW is 0 this field has the following meaning: 1480 // - Bits[12:10] : RES0. 1481 // - Bit[9] : EOI. 1482 // - Bits[8:0] : RES0. 1483 // When ICH_LR<n>.HW is 1: 1484 // - This field is only required to implement enough bits to hold a 1485 // valid value for the implemented INTID size. Any unused higher 1486 // order bits are RES0. 1487 if (requested_ich_lrc.HW == 0) { 1488 ich_lrc.EOI = requested_ich_lrc.EOI; 1489 } else { 1490 ich_lrc.pINTID = requested_ich_lrc.pINTID; 1491 } 1492 1493 val = ich_lrc; 1494 do_virtual_update = true; 1495 break; 1496 } 1497 1498 // List Registers 1499 case MISCREG_ICH_LR0 ... MISCREG_ICH_LR15: { 1500 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 low half part) 1501 RegVal old_val = isa->readMiscRegNoEffect(misc_reg); 1502 val = (old_val & 0xffffffff00000000) | (val & 0xffffffff); 1503 do_virtual_update = true; 1504 break; 1505 } 1506 1507 // List Registers 1508 case MISCREG_ICH_LR0_EL2 ... MISCREG_ICH_LR15_EL2: { // AArch64 1509 ICH_LR_EL2 requested_ich_lr_el2 = val; 1510 ICH_LR_EL2 ich_lr_el2 = isa->readMiscRegNoEffect(misc_reg); 1511 1512 ich_lr_el2.State = requested_ich_lr_el2.State; 1513 ich_lr_el2.HW = requested_ich_lr_el2.HW; 1514 ich_lr_el2.Group = requested_ich_lr_el2.Group; 1515 1516 // Priority, bits [55:48] 1517 // At least five bits must be implemented. 1518 // Unimplemented bits are RES0 and start from bit[48] up to bit[50]. 1519 // We implement 5 bits. 1520 ich_lr_el2.Priority = (requested_ich_lr_el2.Priority & 0xf8) | 1521 (ich_lr_el2.Priority & 0x07); 1522 1523 // pINTID, bits [44:32] 1524 // When ICH_LR<n>_EL2.HW is 0 this field has the following meaning: 1525 // - Bits[44:42] : RES0. 1526 // - Bit[41] : EOI. 1527 // - Bits[40:32] : RES0. 1528 // When ICH_LR<n>_EL2.HW is 1: 1529 // - This field is only required to implement enough bits to hold a 1530 // valid value for the implemented INTID size. Any unused higher 1531 // order bits are RES0. 1532 if (requested_ich_lr_el2.HW == 0) { 1533 ich_lr_el2.EOI = requested_ich_lr_el2.EOI; 1534 } else { 1535 ich_lr_el2.pINTID = requested_ich_lr_el2.pINTID; 1536 } 1537 1538 // vINTID, bits [31:0] 1539 // It is IMPLEMENTATION DEFINED how many bits are implemented, 1540 // though at least 16 bits must be implemented. 1541 // Unimplemented bits are RES0. 1542 ich_lr_el2.vINTID = requested_ich_lr_el2.vINTID; 1543 1544 val = ich_lr_el2; 1545 do_virtual_update = true; 1546 break; 1547 } 1548 1549 // Virtual Machine Control Register 1550 case MISCREG_ICH_VMCR: 1551 case MISCREG_ICH_VMCR_EL2: { 1552 ICH_VMCR_EL2 requested_ich_vmcr_el2 = val; 1553 ICH_VMCR_EL2 ich_vmcr_el2 = 1554 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 1555 ich_vmcr_el2.VPMR = requested_ich_vmcr_el2.VPMR; 1556 uint8_t min_vpr0 = 7 - VIRTUAL_PREEMPTION_BITS; 1557 1558 if (requested_ich_vmcr_el2.VBPR0 < min_vpr0) { 1559 ich_vmcr_el2.VBPR0 = min_vpr0; 1560 } else { 1561 ich_vmcr_el2.VBPR0 = requested_ich_vmcr_el2.VBPR0; 1562 } 1563 1564 uint8_t min_vpr1 = min_vpr0 + 1; 1565 1566 if (requested_ich_vmcr_el2.VBPR1 < min_vpr1) { 1567 ich_vmcr_el2.VBPR1 = min_vpr1; 1568 } else { 1569 ich_vmcr_el2.VBPR1 = requested_ich_vmcr_el2.VBPR1; 1570 } 1571 1572 ich_vmcr_el2.VEOIM = requested_ich_vmcr_el2.VEOIM; 1573 ich_vmcr_el2.VCBPR = requested_ich_vmcr_el2.VCBPR; 1574 ich_vmcr_el2.VENG1 = requested_ich_vmcr_el2.VENG1; 1575 ich_vmcr_el2.VENG0 = requested_ich_vmcr_el2.VENG0; 1576 val = ich_vmcr_el2; 1577 break; 1578 } 1579 1580 // Hyp Active Priorities Group 0 Registers 1581 case MISCREG_ICH_AP0R0: 1582 case MISCREG_ICH_AP0R0_EL2: 1583 break; 1584 1585 // only implemented if supporting 6 or more bits of priority 1586 case MISCREG_ICH_AP0R1: 1587 case MISCREG_ICH_AP0R1_EL2: 1588 // only implemented if supporting 7 or more bits of priority 1589 case MISCREG_ICH_AP0R2: 1590 case MISCREG_ICH_AP0R2_EL2: 1591 // only implemented if supporting 7 or more bits of priority 1592 case MISCREG_ICH_AP0R3: 1593 case MISCREG_ICH_AP0R3_EL2: 1594 // Unimplemented registers are RAZ/WI 1595 return; 1596 1597 // Hyp Active Priorities Group 1 Registers 1598 case MISCREG_ICH_AP1R0: 1599 case MISCREG_ICH_AP1R0_EL2: 1600 break; 1601 1602 // only implemented if supporting 6 or more bits of priority 1603 case MISCREG_ICH_AP1R1: 1604 case MISCREG_ICH_AP1R1_EL2: 1605 // only implemented if supporting 7 or more bits of priority 1606 case MISCREG_ICH_AP1R2: 1607 case MISCREG_ICH_AP1R2_EL2: 1608 // only implemented if supporting 7 or more bits of priority 1609 case MISCREG_ICH_AP1R3: 1610 case MISCREG_ICH_AP1R3_EL2: 1611 // Unimplemented registers are RAZ/WI 1612 return; 1613 1614 default: 1615 panic("Gicv3CPUInterface::setMiscReg(): unknown register %d (%s)", 1616 misc_reg, miscRegName[misc_reg]); 1617 } 1618 1619 isa->setMiscRegNoEffect(misc_reg, val); 1620 1621 if (do_virtual_update) { 1622 virtualUpdate(); 1623 } 1624} 1625 1626int 1627Gicv3CPUInterface::virtualFindActive(uint32_t int_id) const 1628{ 1629 for (uint32_t lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) { 1630 ICH_LR_EL2 ich_lr_el2 = 1631 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 1632 1633 if (((ich_lr_el2.State == ICH_LR_EL2_STATE_ACTIVE) || 1634 (ich_lr_el2.State == ICH_LR_EL2_STATE_ACTIVE_PENDING)) && 1635 (ich_lr_el2.vINTID == int_id)) { 1636 return lr_idx; 1637 } 1638 } 1639 1640 return -1; 1641} 1642 1643uint32_t 1644Gicv3CPUInterface::getHPPIR0() const 1645{ 1646 if (hppi.prio == 0xff || !groupEnabled(hppi.group)) { 1647 return Gicv3::INTID_SPURIOUS; 1648 } 1649 1650 bool irq_is_secure = !distributor->DS && hppi.group != Gicv3::G1NS; 1651 1652 if ((hppi.group != Gicv3::G0S) && isEL3OrMon()) { 1653 // interrupt for the other state pending 1654 return irq_is_secure ? Gicv3::INTID_SECURE : Gicv3::INTID_NONSECURE; 1655 } 1656 1657 if ((hppi.group != Gicv3::G0S)) { // && !isEL3OrMon()) 1658 return Gicv3::INTID_SPURIOUS; 1659 } 1660 1661 if (irq_is_secure && !inSecureState()) { 1662 // Secure interrupts not visible in Non-secure 1663 return Gicv3::INTID_SPURIOUS; 1664 } 1665 1666 return hppi.intid; 1667} 1668 1669uint32_t 1670Gicv3CPUInterface::getHPPIR1() const 1671{ 1672 if (hppi.prio == 0xff || !groupEnabled(hppi.group)) { 1673 return Gicv3::INTID_SPURIOUS; 1674 } 1675 1676 ICC_CTLR_EL3 icc_ctlr_el3 = isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3); 1677 if ((currEL() == EL3) && icc_ctlr_el3.RM) { 1678 if (hppi.group == Gicv3::G0S) { 1679 return Gicv3::INTID_SECURE; 1680 } else if (hppi.group == Gicv3::G1NS) { 1681 return Gicv3::INTID_NONSECURE; 1682 } 1683 } 1684 1685 if (hppi.group == Gicv3::G0S) { 1686 return Gicv3::INTID_SPURIOUS; 1687 } 1688 1689 bool irq_is_secure = (distributor->DS == 0) && (hppi.group != Gicv3::G1NS); 1690 1691 if (irq_is_secure) { 1692 if (!inSecureState()) { 1693 // Secure interrupts not visible in Non-secure 1694 return Gicv3::INTID_SPURIOUS; 1695 } 1696 } else if (!isEL3OrMon() && inSecureState()) { 1697 // Group 1 non-secure interrupts not visible in Secure EL1 1698 return Gicv3::INTID_SPURIOUS; 1699 } 1700 1701 return hppi.intid; 1702} 1703 1704void 1705Gicv3CPUInterface::dropPriority(Gicv3::GroupId group) 1706{ 1707 int apr_misc_reg; 1708 RegVal apr; 1709 apr_misc_reg = group == Gicv3::G0S ? 1710 MISCREG_ICC_AP0R0_EL1 : MISCREG_ICC_AP1R0_EL1; 1711 apr = isa->readMiscRegNoEffect(apr_misc_reg); 1712 1713 if (apr) { 1714 apr &= apr - 1; 1715 isa->setMiscRegNoEffect(apr_misc_reg, apr); 1716 } 1717 1718 update(); 1719} 1720 1721uint8_t 1722Gicv3CPUInterface::virtualDropPriority() 1723{ 1724 int apr_max = 1 << (VIRTUAL_PREEMPTION_BITS - 5); 1725 1726 for (int i = 0; i < apr_max; i++) { 1727 RegVal vapr0 = isa->readMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i); 1728 RegVal vapr1 = isa->readMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i); 1729 1730 if (!vapr0 && !vapr1) { 1731 continue; 1732 } 1733 1734 int vapr0_count = ctz32(vapr0); 1735 int vapr1_count = ctz32(vapr1); 1736 1737 if (vapr0_count <= vapr1_count) { 1738 vapr0 &= vapr0 - 1; 1739 isa->setMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i, vapr0); 1740 return (vapr0_count + i * 32) << (GIC_MIN_VBPR + 1); 1741 } else { 1742 vapr1 &= vapr1 - 1; 1743 isa->setMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i, vapr1); 1744 return (vapr1_count + i * 32) << (GIC_MIN_VBPR + 1); 1745 } 1746 } 1747 1748 return 0xff; 1749} 1750 1751void 1752Gicv3CPUInterface::generateSGI(RegVal val, Gicv3::GroupId group) 1753{ 1754 uint8_t aff3 = bits(val, 55, 48); 1755 uint8_t aff2 = bits(val, 39, 32); 1756 uint8_t aff1 = bits(val, 23, 16);; 1757 uint16_t target_list = bits(val, 15, 0); 1758 uint32_t int_id = bits(val, 27, 24); 1759 bool irm = bits(val, 40, 40); 1760 uint8_t rs = bits(val, 47, 44); 1761 1762 bool ns = !inSecureState(); 1763 1764 for (int i = 0; i < gic->getSystem()->numContexts(); i++) { 1765 Gicv3Redistributor * redistributor_i = 1766 gic->getRedistributor(i); 1767 uint32_t affinity_i = redistributor_i->getAffinity(); 1768 1769 if (irm) { 1770 // Interrupts routed to all PEs in the system, 1771 // excluding "self" 1772 if (affinity_i == redistributor->getAffinity()) { 1773 continue; 1774 } 1775 } else { 1776 // Interrupts routed to the PEs specified by 1777 // Aff3.Aff2.Aff1.<target list> 1778 if ((affinity_i >> 8) != 1779 ((aff3 << 16) | (aff2 << 8) | (aff1 << 0))) { 1780 continue; 1781 } 1782 1783 uint8_t aff0_i = bits(affinity_i, 7, 0); 1784 1785 if (!(aff0_i >= rs * 16 && aff0_i < (rs + 1) * 16 && 1786 ((0x1 << (aff0_i - rs * 16)) & target_list))) { 1787 continue; 1788 } 1789 } 1790 1791 redistributor_i->sendSGI(int_id, group, ns); 1792 } 1793} 1794 1795void 1796Gicv3CPUInterface::activateIRQ(uint32_t int_id, Gicv3::GroupId group) 1797{ 1798 // Update active priority registers. 1799 uint32_t prio = hppi.prio & 0xf8; 1800 int apr_bit = prio >> (8 - PRIORITY_BITS); 1801 int reg_bit = apr_bit % 32; 1802 int apr_idx = group == Gicv3::G0S ? 1803 MISCREG_ICC_AP0R0_EL1 : MISCREG_ICC_AP1R0_EL1; 1804 RegVal apr = isa->readMiscRegNoEffect(apr_idx); 1805 apr |= (1 << reg_bit); 1806 isa->setMiscRegNoEffect(apr_idx, apr); 1807 1808 // Move interrupt state from pending to active. 1809 if (int_id < Gicv3::SGI_MAX + Gicv3::PPI_MAX) { 1810 // SGI or PPI, redistributor 1811 redistributor->activateIRQ(int_id); 1812 } else if (int_id < Gicv3::INTID_SECURE) { 1813 // SPI, distributor 1814 distributor->activateIRQ(int_id); 1815 } else if (int_id >= Gicv3Redistributor::SMALLEST_LPI_ID) { 1816 // LPI, Redistributor 1817 redistributor->setClrLPI(int_id, false); 1818 } 1819 1820 // By setting the priority to 0xff we are effectively 1821 // making the int_id not pending anymore at the cpu 1822 // interface. 1823 hppi.prio = 0xff; 1824 updateDistributor(); 1825} 1826 1827void 1828Gicv3CPUInterface::virtualActivateIRQ(uint32_t lr_idx) 1829{ 1830 // Update active priority registers. 1831 ICH_LR_EL2 ich_lr_el = isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + 1832 lr_idx); 1833 Gicv3::GroupId group = ich_lr_el.Group ? Gicv3::G1NS : Gicv3::G0S; 1834 uint8_t prio = ich_lr_el.Priority & 0xf8; 1835 int apr_bit = prio >> (8 - VIRTUAL_PREEMPTION_BITS); 1836 int reg_no = apr_bit / 32; 1837 int reg_bit = apr_bit % 32; 1838 int apr_idx = group == Gicv3::G0S ? 1839 MISCREG_ICH_AP0R0_EL2 + reg_no : MISCREG_ICH_AP1R0_EL2 + reg_no; 1840 RegVal apr = isa->readMiscRegNoEffect(apr_idx); 1841 apr |= (1 << reg_bit); 1842 isa->setMiscRegNoEffect(apr_idx, apr); 1843 // Move interrupt state from pending to active. 1844 ich_lr_el.State = ICH_LR_EL2_STATE_ACTIVE; 1845 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, ich_lr_el); 1846} 1847 1848void 1849Gicv3CPUInterface::deactivateIRQ(uint32_t int_id, Gicv3::GroupId group) 1850{ 1851 if (int_id < Gicv3::SGI_MAX + Gicv3::PPI_MAX) { 1852 // SGI or PPI, redistributor 1853 redistributor->deactivateIRQ(int_id); 1854 } else if (int_id < Gicv3::INTID_SECURE) { 1855 // SPI, distributor 1856 distributor->deactivateIRQ(int_id); 1857 } 1858 1859 updateDistributor(); 1860} 1861 1862void 1863Gicv3CPUInterface::virtualDeactivateIRQ(int lr_idx) 1864{ 1865 ICH_LR_EL2 ich_lr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + 1866 lr_idx); 1867 1868 if (ich_lr_el2.HW) { 1869 // Deactivate the associated physical interrupt 1870 if (ich_lr_el2.pINTID < Gicv3::INTID_SECURE) { 1871 Gicv3::GroupId group = ich_lr_el2.pINTID >= 32 ? 1872 distributor->getIntGroup(ich_lr_el2.pINTID) : 1873 redistributor->getIntGroup(ich_lr_el2.pINTID); 1874 deactivateIRQ(ich_lr_el2.pINTID, group); 1875 } 1876 } 1877 1878 // Remove the active bit 1879 ich_lr_el2.State = ich_lr_el2.State & ~ICH_LR_EL2_STATE_ACTIVE; 1880 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, ich_lr_el2); 1881} 1882 1883/* 1884 * Returns the priority group field for the current BPR value for the group. 1885 * GroupBits() Pseudocode from spec. 1886 */ 1887uint32_t 1888Gicv3CPUInterface::groupPriorityMask(Gicv3::GroupId group) 1889{ 1890 ICC_CTLR_EL1 icc_ctlr_el1_s = 1891 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S); 1892 ICC_CTLR_EL1 icc_ctlr_el1_ns = 1893 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS); 1894 1895 if ((group == Gicv3::G1S && icc_ctlr_el1_s.CBPR) || 1896 (group == Gicv3::G1NS && icc_ctlr_el1_ns.CBPR)) { 1897 group = Gicv3::G0S; 1898 } 1899 1900 int bpr; 1901 1902 if (group == Gicv3::G0S) { 1903 bpr = readMiscReg(MISCREG_ICC_BPR0_EL1) & 0x7; 1904 } else if (group == Gicv3::G1S) { 1905 bpr = bpr1(Gicv3::G1S) & 0x7; 1906 } else { 1907 bpr = bpr1(Gicv3::G1NS) & 0x7; 1908 } 1909 1910 if (group == Gicv3::G1NS) { 1911 assert(bpr > 0); 1912 bpr--; 1913 } 1914 1915 return ~0U << (bpr + 1); 1916} 1917 1918uint32_t 1919Gicv3CPUInterface::virtualGroupPriorityMask(Gicv3::GroupId group) const 1920{ 1921 ICH_VMCR_EL2 ich_vmcr_el2 = 1922 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 1923 1924 if ((group == Gicv3::G1NS) && ich_vmcr_el2.VCBPR) { 1925 group = Gicv3::G0S; 1926 } 1927 1928 int bpr; 1929 1930 if (group == Gicv3::G0S) { 1931 bpr = ich_vmcr_el2.VBPR0; 1932 } else { 1933 bpr = ich_vmcr_el2.VBPR1; 1934 } 1935 1936 if (group == Gicv3::G1NS) { 1937 assert(bpr > 0); 1938 bpr--; 1939 } 1940 1941 return ~0U << (bpr + 1); 1942} 1943 1944bool 1945Gicv3CPUInterface::isEOISplitMode() const 1946{ 1947 if (isEL3OrMon()) { 1948 ICC_CTLR_EL3 icc_ctlr_el3 = 1949 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3); 1950 return icc_ctlr_el3.EOImode_EL3; 1951 } else { 1952 ICC_CTLR_EL1 icc_ctlr_el1 = 1953 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1); 1954 return icc_ctlr_el1.EOImode; 1955 } 1956} 1957 1958bool 1959Gicv3CPUInterface::virtualIsEOISplitMode() const 1960{ 1961 ICH_VMCR_EL2 ich_vmcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 1962 return ich_vmcr_el2.VEOIM; 1963} 1964 1965int 1966Gicv3CPUInterface::highestActiveGroup() const 1967{ 1968 int g0_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP0R0_EL1)); 1969 int gq_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_S)); 1970 int g1nz_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_NS)); 1971 1972 if (g1nz_ctz < g0_ctz && g1nz_ctz < gq_ctz) { 1973 return Gicv3::G1NS; 1974 } 1975 1976 if (gq_ctz < g0_ctz) { 1977 return Gicv3::G1S; 1978 } 1979 1980 if (g0_ctz < 32) { 1981 return Gicv3::G0S; 1982 } 1983 1984 return -1; 1985} 1986 1987void 1988Gicv3CPUInterface::updateDistributor() 1989{ 1990 distributor->update(); 1991} 1992 1993void 1994Gicv3CPUInterface::update() 1995{ 1996 bool signal_IRQ = false; 1997 bool signal_FIQ = false; 1998 1999 if (hppi.group == Gicv3::G1S && !haveEL(EL3)) { 2000 /* 2001 * Secure enabled GIC sending a G1S IRQ to a secure disabled 2002 * CPU -> send G0 IRQ 2003 */ 2004 hppi.group = Gicv3::G0S; 2005 } 2006 2007 if (hppiCanPreempt()) { 2008 ArmISA::InterruptTypes int_type = intSignalType(hppi.group); 2009 DPRINTF(GIC, "Gicv3CPUInterface::update(): " 2010 "posting int as %d!\n", int_type); 2011 int_type == ArmISA::INT_IRQ ? signal_IRQ = true : signal_FIQ = true; 2012 } 2013 2014 if (signal_IRQ) { 2015 gic->postInt(cpuId, ArmISA::INT_IRQ); 2016 } else { 2017 gic->deassertInt(cpuId, ArmISA::INT_IRQ); 2018 } 2019 2020 if (signal_FIQ) { 2021 gic->postInt(cpuId, ArmISA::INT_FIQ); 2022 } else { 2023 gic->deassertInt(cpuId, ArmISA::INT_FIQ); 2024 } 2025} 2026 2027void 2028Gicv3CPUInterface::virtualUpdate() 2029{ 2030 bool signal_IRQ = false; 2031 bool signal_FIQ = false; 2032 int lr_idx = getHPPVILR(); 2033 2034 if (lr_idx >= 0) { 2035 ICH_LR_EL2 ich_lr_el2 = 2036 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 2037 2038 if (hppviCanPreempt(lr_idx)) { 2039 if (ich_lr_el2.Group) { 2040 signal_IRQ = true; 2041 } else { 2042 signal_FIQ = true; 2043 } 2044 } 2045 } 2046 2047 ICH_HCR_EL2 ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2); 2048 2049 if (ich_hcr_el2.En) { 2050 if (maintenanceInterruptStatus()) { 2051 maintenanceInterrupt->raise(); 2052 } 2053 } 2054 2055 if (signal_IRQ) { 2056 DPRINTF(GIC, "Gicv3CPUInterface::virtualUpdate(): " 2057 "posting int as %d!\n", ArmISA::INT_VIRT_IRQ); 2058 gic->postInt(cpuId, ArmISA::INT_VIRT_IRQ); 2059 } else { 2060 gic->deassertInt(cpuId, ArmISA::INT_VIRT_IRQ); 2061 } 2062 2063 if (signal_FIQ) { 2064 DPRINTF(GIC, "Gicv3CPUInterface::virtualUpdate(): " 2065 "posting int as %d!\n", ArmISA::INT_VIRT_FIQ); 2066 gic->postInt(cpuId, ArmISA::INT_VIRT_FIQ); 2067 } else { 2068 gic->deassertInt(cpuId, ArmISA::INT_VIRT_FIQ); 2069 } 2070} 2071 2072// Returns the index of the LR with the HPPI 2073int 2074Gicv3CPUInterface::getHPPVILR() const 2075{ 2076 int idx = -1; 2077 ICH_VMCR_EL2 ich_vmcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 2078 2079 if (!ich_vmcr_el2.VENG0 && !ich_vmcr_el2.VENG1) { 2080 // VG0 and VG1 disabled... 2081 return idx; 2082 } 2083 2084 uint8_t highest_prio = 0xff; 2085 2086 for (int i = 0; i < 16; i++) { 2087 ICH_LR_EL2 ich_lr_el2 = 2088 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + i); 2089 2090 if (ich_lr_el2.State != Gicv3::INT_PENDING) { 2091 continue; 2092 } 2093 2094 if (ich_lr_el2.Group) { 2095 // VG1 2096 if (!ich_vmcr_el2.VENG1) { 2097 continue; 2098 } 2099 } else { 2100 // VG0 2101 if (!ich_vmcr_el2.VENG0) { 2102 continue; 2103 } 2104 } 2105 2106 uint8_t prio = ich_lr_el2.Priority; 2107 2108 if (prio < highest_prio) { 2109 highest_prio = prio; 2110 idx = i; 2111 } 2112 } 2113 2114 return idx; 2115} 2116 2117bool 2118Gicv3CPUInterface::hppviCanPreempt(int lr_idx) const 2119{ 2120 ICH_HCR_EL2 ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2); 2121 if (!ich_hcr_el2.En) { 2122 // virtual interface is disabled 2123 return false; 2124 } 2125 2126 ICH_LR_EL2 ich_lr_el2 = 2127 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 2128 uint8_t prio = ich_lr_el2.Priority; 2129 uint8_t vpmr = 2130 bits(isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2), 31, 24); 2131 2132 if (prio >= vpmr) { 2133 // prioriry masked 2134 return false; 2135 } 2136 2137 uint8_t rprio = virtualHighestActivePriority(); 2138 2139 if (rprio == 0xff) { 2140 return true; 2141 } 2142 2143 Gicv3::GroupId group = ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S; 2144 uint32_t prio_mask = virtualGroupPriorityMask(group); 2145 2146 if ((prio & prio_mask) < (rprio & prio_mask)) { 2147 return true; 2148 } 2149 2150 return false; 2151} 2152 2153uint8_t 2154Gicv3CPUInterface::virtualHighestActivePriority() const 2155{ 2156 uint8_t num_aprs = 1 << (VIRTUAL_PRIORITY_BITS - 5); 2157 2158 for (int i = 0; i < num_aprs; i++) { 2159 RegVal vapr = 2160 isa->readMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i) | 2161 isa->readMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i); 2162 2163 if (!vapr) { 2164 continue; 2165 } 2166 2167 return (i * 32 + ctz32(vapr)) << (GIC_MIN_VBPR + 1); 2168 } 2169 2170 // no active interrups, return idle priority 2171 return 0xff; 2172} 2173 2174void 2175Gicv3CPUInterface::virtualIncrementEOICount() 2176{ 2177 // Increment the EOICOUNT field in ICH_HCR_EL2 2178 RegVal ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2); 2179 uint32_t EOI_cout = bits(ich_hcr_el2, 31, 27); 2180 EOI_cout++; 2181 ich_hcr_el2 = insertBits(ich_hcr_el2, 31, 27, EOI_cout); 2182 isa->setMiscRegNoEffect(MISCREG_ICH_HCR_EL2, ich_hcr_el2); 2183} 2184 2185// spec section 4.6.2 2186ArmISA::InterruptTypes 2187Gicv3CPUInterface::intSignalType(Gicv3::GroupId group) const 2188{ 2189 bool is_fiq = false; 2190 2191 switch (group) { 2192 case Gicv3::G0S: 2193 is_fiq = true; 2194 break; 2195 2196 case Gicv3::G1S: 2197 is_fiq = (distributor->DS == 0) && 2198 (!inSecureState() || ((currEL() == EL3) && isAA64())); 2199 break; 2200 2201 case Gicv3::G1NS: 2202 is_fiq = (distributor->DS == 0) && inSecureState(); 2203 break; 2204 2205 default: 2206 panic("Gicv3CPUInterface::intSignalType(): invalid group!"); 2207 } 2208 2209 if (is_fiq) { 2210 return ArmISA::INT_FIQ; 2211 } else { 2212 return ArmISA::INT_IRQ; 2213 } 2214} 2215 2216bool 2217Gicv3CPUInterface::hppiCanPreempt() 2218{ 2219 if (hppi.prio == 0xff) { 2220 // there is no pending interrupt 2221 return false; 2222 } 2223 2224 if (!groupEnabled(hppi.group)) { 2225 // group disabled at CPU interface 2226 return false; 2227 } 2228 2229 if (hppi.prio >= isa->readMiscRegNoEffect(MISCREG_ICC_PMR_EL1)) { 2230 // priority masked 2231 return false; 2232 } 2233 2234 uint8_t rprio = highestActivePriority(); 2235 2236 if (rprio == 0xff) { 2237 return true; 2238 } 2239 2240 uint32_t prio_mask = groupPriorityMask(hppi.group); 2241 2242 if ((hppi.prio & prio_mask) < (rprio & prio_mask)) { 2243 return true; 2244 } 2245 2246 return false; 2247} 2248 2249uint8_t 2250Gicv3CPUInterface::highestActivePriority() const 2251{ 2252 uint32_t apr = isa->readMiscRegNoEffect(MISCREG_ICC_AP0R0_EL1) | 2253 isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_NS) | 2254 isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_S); 2255 2256 if (apr) { 2257 return ctz32(apr) << (GIC_MIN_BPR + 1); 2258 } 2259 2260 // no active interrups, return idle priority 2261 return 0xff; 2262} 2263 2264bool 2265Gicv3CPUInterface::groupEnabled(Gicv3::GroupId group) const 2266{ 2267 switch (group) { 2268 case Gicv3::G0S: { 2269 ICC_IGRPEN0_EL1 icc_igrpen0_el1 = 2270 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN0_EL1); 2271 return icc_igrpen0_el1.Enable && distributor->EnableGrp0; 2272 } 2273 2274 case Gicv3::G1S: { 2275 ICC_IGRPEN1_EL1 icc_igrpen1_el1_s = 2276 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_S); 2277 return icc_igrpen1_el1_s.Enable && distributor->EnableGrp1S; 2278 } 2279 2280 case Gicv3::G1NS: { 2281 ICC_IGRPEN1_EL1 icc_igrpen1_el1_ns = 2282 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_NS); 2283 return icc_igrpen1_el1_ns.Enable && distributor->EnableGrp1NS; 2284 } 2285 2286 default: 2287 panic("Gicv3CPUInterface::groupEnable(): invalid group!\n"); 2288 } 2289} 2290 2291bool 2292Gicv3CPUInterface::inSecureState() const 2293{ 2294 if (!gic->getSystem()->haveSecurity()) { 2295 return false; 2296 } 2297 2298 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR); 2299 SCR scr = isa->readMiscRegNoEffect(MISCREG_SCR); 2300 return ArmISA::inSecureState(scr, cpsr); 2301} 2302 2303int 2304Gicv3CPUInterface::currEL() const 2305{ 2306 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR); 2307 bool is_64 = opModeIs64((OperatingMode)(uint8_t) cpsr.mode); 2308 2309 if (is_64) { 2310 return (ExceptionLevel)(uint8_t) cpsr.el; 2311 } else { 2312 switch (cpsr.mode) { 2313 case MODE_USER: 2314 return 0; 2315 2316 case MODE_HYP: 2317 return 2; 2318 2319 case MODE_MON: 2320 return 3; 2321 2322 default: 2323 return 1; 2324 } 2325 } 2326} 2327 2328bool 2329Gicv3CPUInterface::haveEL(ExceptionLevel el) const 2330{ 2331 switch (el) { 2332 case EL0: 2333 case EL1: 2334 return true; 2335 2336 case EL2: 2337 return gic->getSystem()->haveVirtualization(); 2338 2339 case EL3: 2340 return gic->getSystem()->haveSecurity(); 2341 2342 default: 2343 warn("Unimplemented Exception Level\n"); 2344 return false; 2345 } 2346} 2347 2348bool 2349Gicv3CPUInterface::isSecureBelowEL3() const 2350{ 2351 SCR scr = isa->readMiscRegNoEffect(MISCREG_SCR_EL3); 2352 return haveEL(EL3) && scr.ns == 0; 2353} 2354 2355bool 2356Gicv3CPUInterface::isAA64() const 2357{ 2358 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR); 2359 return opModeIs64((OperatingMode)(uint8_t) cpsr.mode); 2360} 2361 2362bool 2363Gicv3CPUInterface::isEL3OrMon() const 2364{ 2365 if (haveEL(EL3)) { 2366 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR); 2367 bool is_64 = opModeIs64((OperatingMode)(uint8_t) cpsr.mode); 2368 2369 if (is_64 && (cpsr.el == EL3)) { 2370 return true; 2371 } else if (!is_64 && (cpsr.mode == MODE_MON)) { 2372 return true; 2373 } 2374 } 2375 2376 return false; 2377} 2378 2379// Computes ICH_EISR_EL2 2380uint64_t 2381Gicv3CPUInterface::eoiMaintenanceInterruptStatus() const 2382{ 2383 // ICH_EISR_EL2 2384 // Bits [63:16] - RES0 2385 // Status<n>, bit [n], for n = 0 to 15 2386 // EOI maintenance interrupt status bit for List register <n>: 2387 // 0 if List register <n>, ICH_LR<n>_EL2, does not have an EOI 2388 // maintenance interrupt. 2389 // 1 if List register <n>, ICH_LR<n>_EL2, has an EOI maintenance 2390 // interrupt that has not been handled. 2391 // 2392 // For any ICH_LR<n>_EL2, the corresponding status bit is set to 1 if all 2393 // of the following are true: 2394 // - ICH_LR<n>_EL2.State is 0b00 (ICH_LR_EL2_STATE_INVALID). 2395 // - ICH_LR<n>_EL2.HW is 0. 2396 // - ICH_LR<n>_EL2.EOI (bit [41]) is 1. 2397 2398 uint64_t value = 0; 2399 2400 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) { 2401 ICH_LR_EL2 ich_lr_el2 = 2402 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 2403 2404 if ((ich_lr_el2.State == ICH_LR_EL2_STATE_INVALID) && 2405 !ich_lr_el2.HW && ich_lr_el2.EOI) { 2406 value |= (1 << lr_idx); 2407 } 2408 } 2409 2410 return value; 2411} 2412 2413Gicv3CPUInterface::ICH_MISR_EL2 2414Gicv3CPUInterface::maintenanceInterruptStatus() const 2415{ 2416 // Comments are copied from SPEC section 9.4.7 (ID012119) 2417 ICH_MISR_EL2 ich_misr_el2 = 0; 2418 ICH_HCR_EL2 ich_hcr_el2 = 2419 isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2); 2420 ICH_VMCR_EL2 ich_vmcr_el2 = 2421 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 2422 2423 // End Of Interrupt. [bit 0] 2424 // This maintenance interrupt is asserted when at least one bit in 2425 // ICH_EISR_EL2 is 1. 2426 2427 if (eoiMaintenanceInterruptStatus()) { 2428 ich_misr_el2.EOI = 1; 2429 } 2430 2431 // Underflow. [bit 1] 2432 // This maintenance interrupt is asserted when ICH_HCR_EL2.UIE==1 and 2433 // zero or one of the List register entries are marked as a valid 2434 // interrupt, that is, if the corresponding ICH_LR<n>_EL2.State bits 2435 // do not equal 0x0. 2436 uint32_t num_valid_interrupts = 0; 2437 uint32_t num_pending_interrupts = 0; 2438 2439 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) { 2440 ICH_LR_EL2 ich_lr_el2 = 2441 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 2442 2443 if (ich_lr_el2.State != ICH_LR_EL2_STATE_INVALID) { 2444 num_valid_interrupts++; 2445 } 2446 2447 if (ich_lr_el2.State == ICH_LR_EL2_STATE_PENDING) { 2448 num_pending_interrupts++; 2449 } 2450 } 2451 2452 if (ich_hcr_el2.UIE && (num_valid_interrupts < 2)) { 2453 ich_misr_el2.U = 1; 2454 } 2455 2456 // List Register Entry Not Present. [bit 2] 2457 // This maintenance interrupt is asserted when ICH_HCR_EL2.LRENPIE==1 2458 // and ICH_HCR_EL2.EOIcount is non-zero. 2459 if (ich_hcr_el2.LRENPIE && ich_hcr_el2.EOIcount) { 2460 ich_misr_el2.LRENP = 1; 2461 } 2462 2463 // No Pending. [bit 3] 2464 // This maintenance interrupt is asserted when ICH_HCR_EL2.NPIE==1 and 2465 // no List register is in pending state. 2466 if (ich_hcr_el2.NPIE && (num_pending_interrupts == 0)) { 2467 ich_misr_el2.NP = 1; 2468 } 2469 2470 // vPE Group 0 Enabled. [bit 4] 2471 // This maintenance interrupt is asserted when 2472 // ICH_HCR_EL2.VGrp0EIE==1 and ICH_VMCR_EL2.VENG0==1. 2473 if (ich_hcr_el2.VGrp0EIE && ich_vmcr_el2.VENG0) { 2474 ich_misr_el2.VGrp0E = 1; 2475 } 2476 2477 // vPE Group 0 Disabled. [bit 5] 2478 // This maintenance interrupt is asserted when 2479 // ICH_HCR_EL2.VGrp0DIE==1 and ICH_VMCR_EL2.VENG0==0. 2480 if (ich_hcr_el2.VGrp0DIE && !ich_vmcr_el2.VENG0) { 2481 ich_misr_el2.VGrp0D = 1; 2482 } 2483 2484 // vPE Group 1 Enabled. [bit 6] 2485 // This maintenance interrupt is asserted when 2486 // ICH_HCR_EL2.VGrp1EIE==1 and ICH_VMCR_EL2.VENG1==is 1. 2487 if (ich_hcr_el2.VGrp1EIE && ich_vmcr_el2.VENG1) { 2488 ich_misr_el2.VGrp1E = 1; 2489 } 2490 2491 // vPE Group 1 Disabled. [bit 7] 2492 // This maintenance interrupt is asserted when 2493 // ICH_HCR_EL2.VGrp1DIE==1 and ICH_VMCR_EL2.VENG1==is 0. 2494 if (ich_hcr_el2.VGrp1DIE && !ich_vmcr_el2.VENG1) { 2495 ich_misr_el2.VGrp1D = 1; 2496 } 2497 2498 return ich_misr_el2; 2499} 2500 2501RegVal 2502Gicv3CPUInterface::bpr1(Gicv3::GroupId group) 2503{ 2504 bool hcr_imo = getHCREL2IMO(); 2505 if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 2506 return readMiscReg(MISCREG_ICV_BPR1_EL1); 2507 } 2508 2509 RegVal bpr = 0; 2510 2511 if (group == Gicv3::G1S) { 2512 ICC_CTLR_EL1 icc_ctlr_el1_s = 2513 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S); 2514 2515 if (!isEL3OrMon() && icc_ctlr_el1_s.CBPR) { 2516 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR0_EL1); 2517 } else { 2518 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR1_EL1_S); 2519 bpr = bpr > GIC_MIN_BPR ? bpr : GIC_MIN_BPR; 2520 } 2521 } else if (group == Gicv3::G1NS) { 2522 ICC_CTLR_EL1 icc_ctlr_el1_ns = 2523 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS); 2524 2525 // Check if EL3 is implemented and this is a non secure accesses at 2526 // EL1 and EL2 2527 if (haveEL(EL3) && !isEL3OrMon() && icc_ctlr_el1_ns.CBPR) { 2528 // Reads return BPR0 + 1 saturated to 7, WI 2529 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR0_EL1) + 1; 2530 bpr = bpr < 7 ? bpr : 7; 2531 } else { 2532 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR1_EL1_NS); 2533 bpr = bpr > GIC_MIN_BPR_NS ? bpr : GIC_MIN_BPR_NS; 2534 } 2535 } else { 2536 panic("Should be used with G1S and G1NS only\n"); 2537 } 2538 2539 return bpr; 2540} 2541 2542void 2543Gicv3CPUInterface::serialize(CheckpointOut & cp) const 2544{ 2545 SERIALIZE_SCALAR(hppi.intid); 2546 SERIALIZE_SCALAR(hppi.prio); 2547 SERIALIZE_ENUM(hppi.group); 2548} 2549 2550void 2551Gicv3CPUInterface::unserialize(CheckpointIn & cp) 2552{ 2553 UNSERIALIZE_SCALAR(hppi.intid); 2554 UNSERIALIZE_SCALAR(hppi.prio); 2555 UNSERIALIZE_ENUM(hppi.group); 2556} 2557