gic_v3_cpu_interface.cc revision 13760:fcec3c5abbdf
112839Sgabeblack@google.com/* 212839Sgabeblack@google.com * Copyright (c) 2018 Metempsy Technology Consulting 312839Sgabeblack@google.com * All rights reserved. 412839Sgabeblack@google.com * 512839Sgabeblack@google.com * Redistribution and use in source and binary forms, with or without 612839Sgabeblack@google.com * modification, are permitted provided that the following conditions are 712839Sgabeblack@google.com * met: redistributions of source code must retain the above copyright 812839Sgabeblack@google.com * notice, this list of conditions and the following disclaimer; 912839Sgabeblack@google.com * redistributions in binary form must reproduce the above copyright 1012839Sgabeblack@google.com * notice, this list of conditions and the following disclaimer in the 1112839Sgabeblack@google.com * documentation and/or other materials provided with the distribution; 1212839Sgabeblack@google.com * neither the name of the copyright holders nor the names of its 1312839Sgabeblack@google.com * contributors may be used to endorse or promote products derived from 1412839Sgabeblack@google.com * this software without specific prior written permission. 1512839Sgabeblack@google.com * 1612839Sgabeblack@google.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1712839Sgabeblack@google.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1812839Sgabeblack@google.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1912839Sgabeblack@google.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2012839Sgabeblack@google.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2112839Sgabeblack@google.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2212839Sgabeblack@google.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2312839Sgabeblack@google.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2412839Sgabeblack@google.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2512839Sgabeblack@google.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2612839Sgabeblack@google.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2712839Sgabeblack@google.com * 2812839Sgabeblack@google.com * Authors: Jairo Balart 2912839Sgabeblack@google.com */ 3012839Sgabeblack@google.com 3112993Sgabeblack@google.com#include "dev/arm/gic_v3_cpu_interface.hh" 3212993Sgabeblack@google.com 3312993Sgabeblack@google.com#include "arch/arm/isa.hh" 3413129Sgabeblack@google.com#include "debug/GIC.hh" 3512993Sgabeblack@google.com#include "dev/arm/gic_v3.hh" 3612839Sgabeblack@google.com#include "dev/arm/gic_v3_distributor.hh" 3712839Sgabeblack@google.com#include "dev/arm/gic_v3_redistributor.hh" 3812993Sgabeblack@google.com 3912993Sgabeblack@google.comGicv3CPUInterface::Gicv3CPUInterface(Gicv3 * gic, uint32_t cpu_id) 4012993Sgabeblack@google.com : BaseISADevice(), 4112993Sgabeblack@google.com gic(gic), 4212993Sgabeblack@google.com redistributor(nullptr), 4312993Sgabeblack@google.com distributor(nullptr), 4412993Sgabeblack@google.com cpuId(cpu_id) 4512993Sgabeblack@google.com{ 4612993Sgabeblack@google.com} 4712993Sgabeblack@google.com 4812993Sgabeblack@google.comvoid 4912993Sgabeblack@google.comGicv3CPUInterface::init() 5012993Sgabeblack@google.com{ 5112993Sgabeblack@google.com redistributor = gic->getRedistributor(cpuId); 5212993Sgabeblack@google.com distributor = gic->getDistributor(); 5312993Sgabeblack@google.com} 5412993Sgabeblack@google.com 5512993Sgabeblack@google.comvoid 5612993Sgabeblack@google.comGicv3CPUInterface::initState() 5712993Sgabeblack@google.com{ 5812993Sgabeblack@google.com reset(); 5912993Sgabeblack@google.com} 6012993Sgabeblack@google.com 6112993Sgabeblack@google.comvoid 6212993Sgabeblack@google.comGicv3CPUInterface::reset() 6312993Sgabeblack@google.com{ 6412993Sgabeblack@google.com hppi.prio = 0xff; 6513131Sgabeblack@google.com} 6612993Sgabeblack@google.com 6713131Sgabeblack@google.combool 6812993Sgabeblack@google.comGicv3CPUInterface::getHCREL2FMO() const 6913194Sgabeblack@google.com{ 7013194Sgabeblack@google.com HCR hcr = isa->readMiscRegNoEffect(MISCREG_HCR_EL2); 7112993Sgabeblack@google.com 7212993Sgabeblack@google.com if (hcr.tge && hcr.e2h) { 7313207Sgabeblack@google.com return false; 7412993Sgabeblack@google.com } else if (hcr.tge) { 7512993Sgabeblack@google.com return true; 7613207Sgabeblack@google.com } else { 7712993Sgabeblack@google.com return hcr.fmo; 7812993Sgabeblack@google.com } 7913207Sgabeblack@google.com} 8012993Sgabeblack@google.com 8112993Sgabeblack@google.combool 8213207Sgabeblack@google.comGicv3CPUInterface::getHCREL2IMO() const 8312993Sgabeblack@google.com{ 8412993Sgabeblack@google.com HCR hcr = isa->readMiscRegNoEffect(MISCREG_HCR_EL2); 8513207Sgabeblack@google.com 8612993Sgabeblack@google.com if (hcr.tge && hcr.e2h) { 8712993Sgabeblack@google.com return false; 8813180Sgabeblack@google.com } else if (hcr.tge) { 8913180Sgabeblack@google.com return true; 9013180Sgabeblack@google.com } else { 9113180Sgabeblack@google.com return hcr.imo; 9213180Sgabeblack@google.com } 9313180Sgabeblack@google.com} 9413180Sgabeblack@google.com 9513180Sgabeblack@google.comRegVal 9613180Sgabeblack@google.comGicv3CPUInterface::readMiscReg(int misc_reg) 9713180Sgabeblack@google.com{ 9812993Sgabeblack@google.com RegVal value = isa->readMiscRegNoEffect(misc_reg); 9912993Sgabeblack@google.com bool hcr_fmo = getHCREL2FMO(); 10012993Sgabeblack@google.com bool hcr_imo = getHCREL2IMO(); 10112993Sgabeblack@google.com 10212993Sgabeblack@google.com switch (misc_reg) { 10312993Sgabeblack@google.com // Active Priorities Group 1 Registers 10412993Sgabeblack@google.com case MISCREG_ICC_AP1R0: 10512839Sgabeblack@google.com case MISCREG_ICC_AP1R0_EL1: { 10612839Sgabeblack@google.com if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 10712839Sgabeblack@google.com return isa->readMiscRegNoEffect(MISCREG_ICV_AP1R0_EL1); 10812993Sgabeblack@google.com } 10912993Sgabeblack@google.com 11012993Sgabeblack@google.com break; 11112839Sgabeblack@google.com } 11212839Sgabeblack@google.com 11312839Sgabeblack@google.com case MISCREG_ICC_AP1R1: 11412839Sgabeblack@google.com case MISCREG_ICC_AP1R1_EL1: 11512839Sgabeblack@google.com 11612993Sgabeblack@google.com // only implemented if supporting 6 or more bits of priority 11712839Sgabeblack@google.com case MISCREG_ICC_AP1R2: 11812839Sgabeblack@google.com case MISCREG_ICC_AP1R2_EL1: 11912839Sgabeblack@google.com 12012839Sgabeblack@google.com // only implemented if supporting 7 or more bits of priority 12112839Sgabeblack@google.com case MISCREG_ICC_AP1R3: 12212993Sgabeblack@google.com case MISCREG_ICC_AP1R3_EL1: 12312839Sgabeblack@google.com // only implemented if supporting 7 or more bits of priority 12412839Sgabeblack@google.com return 0; 12512839Sgabeblack@google.com 12612993Sgabeblack@google.com // Active Priorities Group 0 Registers 12712839Sgabeblack@google.com case MISCREG_ICC_AP0R0: 12812993Sgabeblack@google.com case MISCREG_ICC_AP0R0_EL1: { 12912839Sgabeblack@google.com if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 13012839Sgabeblack@google.com return isa->readMiscRegNoEffect(MISCREG_ICV_AP0R0_EL1); 13112839Sgabeblack@google.com } 13212839Sgabeblack@google.com 13312993Sgabeblack@google.com break; 13412839Sgabeblack@google.com } 13512993Sgabeblack@google.com 13612839Sgabeblack@google.com case MISCREG_ICC_AP0R1: 13712839Sgabeblack@google.com case MISCREG_ICC_AP0R1_EL1: 13812839Sgabeblack@google.com 13912993Sgabeblack@google.com // only implemented if supporting 6 or more bits of priority 14012839Sgabeblack@google.com case MISCREG_ICC_AP0R2: 14112993Sgabeblack@google.com case MISCREG_ICC_AP0R2_EL1: 14212839Sgabeblack@google.com 14312839Sgabeblack@google.com // only implemented if supporting 7 or more bits of priority 14412839Sgabeblack@google.com case MISCREG_ICC_AP0R3: 14512993Sgabeblack@google.com case MISCREG_ICC_AP0R3_EL1: 14612839Sgabeblack@google.com // only implemented if supporting 7 or more bits of priority 14712993Sgabeblack@google.com return 0; 14812839Sgabeblack@google.com 14912839Sgabeblack@google.com // Interrupt Group 0 Enable register EL1 15012839Sgabeblack@google.com case MISCREG_ICC_IGRPEN0: 15112993Sgabeblack@google.com case MISCREG_ICC_IGRPEN0_EL1: { 15212839Sgabeblack@google.com if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 15312993Sgabeblack@google.com return isa->readMiscRegNoEffect(MISCREG_ICV_IGRPEN0_EL1); 15412839Sgabeblack@google.com } 15512839Sgabeblack@google.com 15612839Sgabeblack@google.com break; 15712993Sgabeblack@google.com } 15812839Sgabeblack@google.com 15912993Sgabeblack@google.com // Interrupt Group 1 Enable register EL1 16012839Sgabeblack@google.com case MISCREG_ICC_IGRPEN1: 16112839Sgabeblack@google.com case MISCREG_ICC_IGRPEN1_EL1: { 16212839Sgabeblack@google.com if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 16312839Sgabeblack@google.com return isa->readMiscRegNoEffect(MISCREG_ICV_IGRPEN1_EL1); 16412839Sgabeblack@google.com } 16512839Sgabeblack@google.com 16612839Sgabeblack@google.com break; 16712839Sgabeblack@google.com } 16812839Sgabeblack@google.com 16912839Sgabeblack@google.com // Interrupt Group 1 Enable register EL3 17012839Sgabeblack@google.com case MISCREG_ICC_MGRPEN1: 17112839Sgabeblack@google.com case MISCREG_ICC_IGRPEN1_EL3: 17212839Sgabeblack@google.com break; 17312839Sgabeblack@google.com 17412839Sgabeblack@google.com // Running Priority Register 17512839Sgabeblack@google.com case MISCREG_ICC_RPR: 17612839Sgabeblack@google.com case MISCREG_ICC_RPR_EL1: { 17712839Sgabeblack@google.com if ((currEL() == EL1) && !inSecureState() && 17812839Sgabeblack@google.com (hcr_imo || hcr_fmo)) { 17912839Sgabeblack@google.com return readMiscReg(MISCREG_ICV_RPR_EL1); 18012839Sgabeblack@google.com } 18112839Sgabeblack@google.com 18212839Sgabeblack@google.com uint8_t rprio = highestActivePriority(); 18312839Sgabeblack@google.com 18412839Sgabeblack@google.com if (haveEL(EL3) && !inSecureState() && 18512839Sgabeblack@google.com (isa->readMiscRegNoEffect(MISCREG_SCR_EL3) & (1U << 2))) { 18612839Sgabeblack@google.com // Spec section 4.8.1 18712839Sgabeblack@google.com // For Non-secure access to ICC_RPR_EL1 when SCR_EL3.FIQ == 1 18812839Sgabeblack@google.com if ((rprio & 0x80) == 0) { 18912839Sgabeblack@google.com // If the current priority mask value is in the range of 19012839Sgabeblack@google.com // 0x00-0x7F a read access returns the value 0x0 19112839Sgabeblack@google.com rprio = 0; 19212839Sgabeblack@google.com } else if (rprio != 0xff) { 19312839Sgabeblack@google.com // If the current priority mask value is in the range of 19412839Sgabeblack@google.com // 0x80-0xFF a read access returns the Non-secure read of 19512839Sgabeblack@google.com // the current value 19612839Sgabeblack@google.com rprio = (rprio << 1) & 0xff; 19712839Sgabeblack@google.com } 19812839Sgabeblack@google.com } 19912839Sgabeblack@google.com 20012839Sgabeblack@google.com value = rprio; 20112839Sgabeblack@google.com break; 20212839Sgabeblack@google.com } 20312839Sgabeblack@google.com 20412839Sgabeblack@google.com // Virtual Running Priority Register 20512839Sgabeblack@google.com case MISCREG_ICV_RPR_EL1: { 20612839Sgabeblack@google.com value = virtualHighestActivePriority(); 20712839Sgabeblack@google.com break; 20812839Sgabeblack@google.com } 20912839Sgabeblack@google.com 21012839Sgabeblack@google.com // Highest Priority Pending Interrupt Register 0 21112839Sgabeblack@google.com case MISCREG_ICC_HPPIR0: 21212839Sgabeblack@google.com case MISCREG_ICC_HPPIR0_EL1: { 21312839Sgabeblack@google.com if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 21412839Sgabeblack@google.com return readMiscReg(MISCREG_ICV_HPPIR0_EL1); 21512839Sgabeblack@google.com } 21612839Sgabeblack@google.com 21712839Sgabeblack@google.com value = getHPPIR0(); 21812839Sgabeblack@google.com break; 21912839Sgabeblack@google.com } 22012839Sgabeblack@google.com 22112839Sgabeblack@google.com // Virtual Highest Priority Pending Interrupt Register 0 22212839Sgabeblack@google.com case MISCREG_ICV_HPPIR0_EL1: { 22312839Sgabeblack@google.com value = Gicv3::INTID_SPURIOUS; 22412839Sgabeblack@google.com int lr_idx = getHPPVILR(); 22512839Sgabeblack@google.com 22612839Sgabeblack@google.com if (lr_idx >= 0) { 22712839Sgabeblack@google.com ICH_LR_EL2 ich_lr_el2 = 22812839Sgabeblack@google.com isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 22912839Sgabeblack@google.com Gicv3::GroupId group = 23012839Sgabeblack@google.com ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S; 23112839Sgabeblack@google.com 23212839Sgabeblack@google.com if (group == Gicv3::G0S) { 23312839Sgabeblack@google.com value = ich_lr_el2.vINTID; 23412839Sgabeblack@google.com } 235 } 236 237 break; 238 } 239 240 // Highest Priority Pending Interrupt Register 1 241 case MISCREG_ICC_HPPIR1: 242 case MISCREG_ICC_HPPIR1_EL1: { 243 if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 244 return readMiscReg(MISCREG_ICV_HPPIR1_EL1); 245 } 246 247 value = getHPPIR1(); 248 break; 249 } 250 251 // Virtual Highest Priority Pending Interrupt Register 1 252 case MISCREG_ICV_HPPIR1_EL1: { 253 value = Gicv3::INTID_SPURIOUS; 254 int lr_idx = getHPPVILR(); 255 256 if (lr_idx >= 0) { 257 ICH_LR_EL2 ich_lr_el2 = 258 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 259 Gicv3::GroupId group = 260 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S; 261 262 if (group == Gicv3::G1NS) { 263 value = ich_lr_el2.vINTID; 264 } 265 } 266 267 break; 268 } 269 270 // Binary Point Register 0 271 case MISCREG_ICC_BPR0: 272 case MISCREG_ICC_BPR0_EL1: 273 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 274 return readMiscReg(MISCREG_ICV_BPR0_EL1); 275 } 276 277 M5_FALLTHROUGH; 278 279 // Binary Point Register 1 280 case MISCREG_ICC_BPR1: 281 case MISCREG_ICC_BPR1_EL1: { 282 if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 283 return readMiscReg(MISCREG_ICV_BPR1_EL1); 284 } 285 286 Gicv3::GroupId group = 287 misc_reg == MISCREG_ICC_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1S; 288 289 if (group == Gicv3::G1S && !inSecureState()) { 290 group = Gicv3::G1NS; 291 } 292 293 ICC_CTLR_EL1 icc_ctlr_el1_s = 294 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S); 295 296 if ((group == Gicv3::G1S) && !isEL3OrMon() && 297 icc_ctlr_el1_s.CBPR) { 298 group = Gicv3::G0S; 299 } 300 301 bool sat_inc = false; 302 303 ICC_CTLR_EL1 icc_ctlr_el1_ns = 304 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS); 305 306 if ((group == Gicv3::G1NS) && (currEL() < EL3) && 307 icc_ctlr_el1_ns.CBPR) { 308 // Reads return BPR0 + 1 saturated to 7, WI 309 group = Gicv3::G0S; 310 sat_inc = true; 311 } 312 313 uint8_t bpr; 314 315 if (group == Gicv3::G0S) { 316 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR0_EL1); 317 } else { 318 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR1_EL1); 319 } 320 321 if (sat_inc) { 322 bpr++; 323 324 if (bpr > 7) { 325 bpr = 7; 326 } 327 } 328 329 value = bpr; 330 break; 331 } 332 333 // Virtual Binary Point Register 1 334 case MISCREG_ICV_BPR0_EL1: 335 case MISCREG_ICV_BPR1_EL1: { 336 Gicv3::GroupId group = 337 misc_reg == MISCREG_ICV_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1NS; 338 ICH_VMCR_EL2 ich_vmcr_el2 = 339 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 340 bool sat_inc = false; 341 342 if ((group == Gicv3::G1NS) && ich_vmcr_el2.VCBPR) { 343 // bpr0 + 1 saturated to 7, WI 344 group = Gicv3::G0S; 345 sat_inc = true; 346 } 347 348 uint8_t vbpr; 349 350 if (group == Gicv3::G0S) { 351 vbpr = ich_vmcr_el2.VBPR0; 352 } else { 353 vbpr = ich_vmcr_el2.VBPR1; 354 } 355 356 if (sat_inc) { 357 vbpr++; 358 359 if (vbpr > 7) { 360 vbpr = 7; 361 } 362 } 363 364 value = vbpr; 365 break; 366 } 367 368 // Interrupt Priority Mask Register 369 case MISCREG_ICC_PMR: 370 case MISCREG_ICC_PMR_EL1: 371 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) { 372 return isa->readMiscRegNoEffect(MISCREG_ICV_PMR_EL1); 373 } 374 375 if (haveEL(EL3) && !inSecureState() && 376 (isa->readMiscRegNoEffect(MISCREG_SCR_EL3) & (1U << 2))) { 377 // Spec section 4.8.1 378 // For Non-secure access to ICC_PMR_EL1 when SCR_EL3.FIQ == 1: 379 if ((value & 0x80) == 0) { 380 // If the current priority mask value is in the range of 381 // 0x00-0x7F a read access returns the value 0x00. 382 value = 0; 383 } else if (value != 0xff) { 384 // If the current priority mask value is in the range of 385 // 0x80-0xFF a read access returns the Non-secure read of the 386 // current value. 387 value = (value << 1) & 0xff; 388 } 389 } 390 391 break; 392 393 // Interrupt Acknowledge Register 0 394 case MISCREG_ICC_IAR0: 395 case MISCREG_ICC_IAR0_EL1: { 396 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 397 return readMiscReg(MISCREG_ICV_IAR0_EL1); 398 } 399 400 uint32_t int_id; 401 402 if (hppiCanPreempt()) { 403 int_id = getHPPIR0(); 404 405 // avoid activation for special interrupts 406 if (int_id < Gicv3::INTID_SECURE) { 407 activateIRQ(int_id, hppi.group); 408 } 409 } else { 410 int_id = Gicv3::INTID_SPURIOUS; 411 } 412 413 value = int_id; 414 break; 415 } 416 417 // Virtual Interrupt Acknowledge Register 0 418 case MISCREG_ICV_IAR0_EL1: { 419 int lr_idx = getHPPVILR(); 420 uint32_t int_id = Gicv3::INTID_SPURIOUS; 421 422 if (lr_idx >= 0) { 423 ICH_LR_EL2 ich_lr_el2 = 424 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 425 426 if (!ich_lr_el2.Group && hppviCanPreempt(lr_idx)) { 427 int_id = ich_lr_el2.vINTID; 428 429 if (int_id < Gicv3::INTID_SECURE || 430 int_id > Gicv3::INTID_SPURIOUS) { 431 virtualActivateIRQ(lr_idx); 432 } else { 433 // Bogus... Pseudocode says: 434 // - Move from pending to invalid... 435 // - Return de bogus id... 436 ich_lr_el2.State = ICH_LR_EL2_STATE_INVALID; 437 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, 438 ich_lr_el2); 439 } 440 } 441 } 442 443 value = int_id; 444 virtualUpdate(); 445 break; 446 } 447 448 // Interrupt Acknowledge Register 1 449 case MISCREG_ICC_IAR1: 450 case MISCREG_ICC_IAR1_EL1: { 451 if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 452 return readMiscReg(MISCREG_ICV_IAR1_EL1); 453 } 454 455 uint32_t int_id; 456 457 if (hppiCanPreempt()) { 458 int_id = getHPPIR1(); 459 460 // avoid activation for special interrupts 461 if (int_id < Gicv3::INTID_SECURE) { 462 activateIRQ(int_id, hppi.group); 463 } 464 } else { 465 int_id = Gicv3::INTID_SPURIOUS; 466 } 467 468 value = int_id; 469 break; 470 } 471 472 // Virtual Interrupt Acknowledge Register 1 473 case MISCREG_ICV_IAR1_EL1: { 474 int lr_idx = getHPPVILR(); 475 uint32_t int_id = Gicv3::INTID_SPURIOUS; 476 477 if (lr_idx >= 0) { 478 ICH_LR_EL2 ich_lr_el2 = 479 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 480 481 if (ich_lr_el2.Group && hppviCanPreempt(lr_idx)) { 482 int_id = ich_lr_el2.vINTID; 483 484 if (int_id < Gicv3::INTID_SECURE || 485 int_id > Gicv3::INTID_SPURIOUS) { 486 virtualActivateIRQ(lr_idx); 487 } else { 488 // Bogus... Pseudocode says: 489 // - Move from pending to invalid... 490 // - Return de bogus id... 491 ich_lr_el2.State = ICH_LR_EL2_STATE_INVALID; 492 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, 493 ich_lr_el2); 494 } 495 } 496 } 497 498 value = int_id; 499 virtualUpdate(); 500 break; 501 } 502 503 // System Register Enable Register EL1 504 case MISCREG_ICC_SRE: 505 case MISCREG_ICC_SRE_EL1: { 506 /* 507 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI) 508 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI) 509 * SRE [0] == 1 (Only system register interface supported, RAO/WI) 510 */ 511 ICC_SRE_EL1 icc_sre_el1 = 0; 512 icc_sre_el1.SRE = 1; 513 icc_sre_el1.DIB = 1; 514 icc_sre_el1.DFB = 1; 515 value = icc_sre_el1; 516 break; 517 } 518 519 // System Register Enable Register EL2 520 case MISCREG_ICC_HSRE: 521 case MISCREG_ICC_SRE_EL2: { 522 /* 523 * Enable [3] == 1 524 * (EL1 accesses to ICC_SRE_EL1 do not trap to EL2, RAO/WI) 525 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI) 526 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI) 527 * SRE [0] == 1 (Only system register interface supported, RAO/WI) 528 */ 529 ICC_SRE_EL2 icc_sre_el2 = 0; 530 icc_sre_el2.SRE = 1; 531 icc_sre_el2.DIB = 1; 532 icc_sre_el2.DFB = 1; 533 icc_sre_el2.Enable = 1; 534 value = icc_sre_el2; 535 break; 536 } 537 538 // System Register Enable Register EL3 539 case MISCREG_ICC_MSRE: 540 case MISCREG_ICC_SRE_EL3: { 541 /* 542 * Enable [3] == 1 543 * (EL1 accesses to ICC_SRE_EL1 do not trap to EL3. 544 * EL2 accesses to ICC_SRE_EL1 and ICC_SRE_EL2 do not trap to EL3. 545 * RAO/WI) 546 * DIB [2] == 1 (IRQ bypass not supported, RAO/WI) 547 * DFB [1] == 1 (FIQ bypass not supported, RAO/WI) 548 * SRE [0] == 1 (Only system register interface supported, RAO/WI) 549 */ 550 ICC_SRE_EL3 icc_sre_el3 = 0; 551 icc_sre_el3.SRE = 1; 552 icc_sre_el3.DIB = 1; 553 icc_sre_el3.DFB = 1; 554 icc_sre_el3.Enable = 1; 555 value = icc_sre_el3; 556 break; 557 } 558 559 // Control Register 560 case MISCREG_ICC_CTLR: 561 case MISCREG_ICC_CTLR_EL1: { 562 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) { 563 return readMiscReg(MISCREG_ICV_CTLR_EL1); 564 } 565 566 // Enforce value for RO bits 567 // ExtRange [19], INTIDs in the range 1024..8191 not supported 568 // RSS [18], SGIs with affinity level 0 values of 0-255 are supported 569 // A3V [15], supports non-zero values of the Aff3 field in SGI 570 // generation System registers 571 // SEIS [14], does not support generation of SEIs (deprecated) 572 // IDbits [13:11], 001 = 24 bits | 000 = 16 bits 573 // PRIbits [10:8], number of priority bits implemented, minus one 574 ICC_CTLR_EL1 icc_ctlr_el1 = value; 575 icc_ctlr_el1.ExtRange = 0; 576 icc_ctlr_el1.RSS = 1; 577 icc_ctlr_el1.A3V = 1; 578 icc_ctlr_el1.SEIS = 0; 579 icc_ctlr_el1.IDbits = 1; 580 icc_ctlr_el1.PRIbits = PRIORITY_BITS - 1; 581 value = icc_ctlr_el1; 582 break; 583 } 584 585 // Virtual Control Register 586 case MISCREG_ICV_CTLR_EL1: { 587 ICV_CTLR_EL1 icv_ctlr_el1 = value; 588 icv_ctlr_el1.RSS = 0; 589 icv_ctlr_el1.A3V = 1; 590 icv_ctlr_el1.SEIS = 0; 591 icv_ctlr_el1.IDbits = 1; 592 icv_ctlr_el1.PRIbits = 7; 593 value = icv_ctlr_el1; 594 break; 595 } 596 597 // Control Register 598 case MISCREG_ICC_MCTLR: 599 case MISCREG_ICC_CTLR_EL3: { 600 // Enforce value for RO bits 601 // ExtRange [19], INTIDs in the range 1024..8191 not supported 602 // RSS [18], SGIs with affinity level 0 values of 0-255 are supported 603 // nDS [17], supports disabling of security 604 // A3V [15], supports non-zero values of the Aff3 field in SGI 605 // generation System registers 606 // SEIS [14], does not support generation of SEIs (deprecated) 607 // IDbits [13:11], 001 = 24 bits | 000 = 16 bits 608 // PRIbits [10:8], number of priority bits implemented, minus one 609 ICC_CTLR_EL3 icc_ctlr_el3 = value; 610 icc_ctlr_el3.ExtRange = 0; 611 icc_ctlr_el3.RSS = 1; 612 icc_ctlr_el3.nDS = 0; 613 icc_ctlr_el3.A3V = 1; 614 icc_ctlr_el3.SEIS = 0; 615 icc_ctlr_el3.IDbits = 0; 616 icc_ctlr_el3.PRIbits = PRIORITY_BITS - 1; 617 value = icc_ctlr_el3; 618 break; 619 } 620 621 // Hyp Control Register 622 case MISCREG_ICH_HCR: 623 case MISCREG_ICH_HCR_EL2: 624 break; 625 626 // Hyp Active Priorities Group 0 Registers 627 case MISCREG_ICH_AP0R0: 628 case MISCREG_ICH_AP0R0_EL2: 629 break; 630 631 // Hyp Active Priorities Group 1 Registers 632 case MISCREG_ICH_AP1R0: 633 case MISCREG_ICH_AP1R0_EL2: 634 break; 635 636 // Maintenance Interrupt State Register 637 case MISCREG_ICH_MISR: 638 case MISCREG_ICH_MISR_EL2: 639 value = maintenanceInterruptStatus(); 640 break; 641 642 // VGIC Type Register 643 case MISCREG_ICH_VTR: 644 case MISCREG_ICH_VTR_EL2: { 645 ICH_VTR_EL2 ich_vtr_el2 = value; 646 647 ich_vtr_el2.ListRegs = VIRTUAL_NUM_LIST_REGS - 1; 648 ich_vtr_el2.A3V = 1; 649 ich_vtr_el2.IDbits = 1; 650 ich_vtr_el2.PREbits = VIRTUAL_PREEMPTION_BITS - 1; 651 ich_vtr_el2.PRIbits = VIRTUAL_PRIORITY_BITS - 1; 652 653 value = ich_vtr_el2; 654 break; 655 } 656 657 // End of Interrupt Status Register 658 case MISCREG_ICH_EISR: 659 case MISCREG_ICH_EISR_EL2: 660 value = eoiMaintenanceInterruptStatus(); 661 break; 662 663 // Empty List Register Status Register 664 case MISCREG_ICH_ELRSR: 665 case MISCREG_ICH_ELRSR_EL2: 666 value = 0; 667 668 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) { 669 ICH_LR_EL2 ich_lr_el2 = 670 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 671 672 if ((ich_lr_el2.State == ICH_LR_EL2_STATE_INVALID) && 673 (ich_lr_el2.HW || !ich_lr_el2.EOI)) { 674 value |= (1 << lr_idx); 675 } 676 } 677 678 break; 679 680 // List Registers 681 case MISCREG_ICH_LRC0 ... MISCREG_ICH_LRC15: 682 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 high half part) 683 value = value >> 32; 684 break; 685 686 // List Registers 687 case MISCREG_ICH_LR0 ... MISCREG_ICH_LR15: 688 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 low half part) 689 value = value & 0xffffffff; 690 break; 691 692 // List Registers 693 case MISCREG_ICH_LR0_EL2 ... MISCREG_ICH_LR15_EL2: 694 break; 695 696 // Virtual Machine Control Register 697 case MISCREG_ICH_VMCR: 698 case MISCREG_ICH_VMCR_EL2: 699 break; 700 701 default: 702 panic("Gicv3CPUInterface::readMiscReg(): unknown register %d (%s)", 703 misc_reg, miscRegName[misc_reg]); 704 } 705 706 DPRINTF(GIC, "Gicv3CPUInterface::readMiscReg(): register %s value %#x\n", 707 miscRegName[misc_reg], value); 708 return value; 709} 710 711void 712Gicv3CPUInterface::setMiscReg(int misc_reg, RegVal val) 713{ 714 bool do_virtual_update = false; 715 DPRINTF(GIC, "Gicv3CPUInterface::setMiscReg(): register %s value %#x\n", 716 miscRegName[misc_reg], val); 717 bool hcr_fmo = getHCREL2FMO(); 718 bool hcr_imo = getHCREL2IMO(); 719 720 switch (misc_reg) { 721 // Active Priorities Group 1 Registers 722 case MISCREG_ICC_AP1R0: 723 case MISCREG_ICC_AP1R0_EL1: 724 if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 725 return isa->setMiscRegNoEffect(MISCREG_ICV_AP1R0_EL1, val); 726 } 727 728 break; 729 730 case MISCREG_ICC_AP1R1: 731 case MISCREG_ICC_AP1R1_EL1: 732 733 // only implemented if supporting 6 or more bits of priority 734 case MISCREG_ICC_AP1R2: 735 case MISCREG_ICC_AP1R2_EL1: 736 737 // only implemented if supporting 7 or more bits of priority 738 case MISCREG_ICC_AP1R3: 739 case MISCREG_ICC_AP1R3_EL1: 740 // only implemented if supporting 7 or more bits of priority 741 break; 742 743 // Active Priorities Group 0 Registers 744 case MISCREG_ICC_AP0R0: 745 case MISCREG_ICC_AP0R0_EL1: 746 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 747 return isa->setMiscRegNoEffect(MISCREG_ICV_AP0R0_EL1, val); 748 } 749 750 break; 751 752 case MISCREG_ICC_AP0R1: 753 case MISCREG_ICC_AP0R1_EL1: 754 755 // only implemented if supporting 6 or more bits of priority 756 case MISCREG_ICC_AP0R2: 757 case MISCREG_ICC_AP0R2_EL1: 758 759 // only implemented if supporting 7 or more bits of priority 760 case MISCREG_ICC_AP0R3: 761 case MISCREG_ICC_AP0R3_EL1: 762 // only implemented if supporting 7 or more bits of priority 763 break; 764 765 // End Of Interrupt Register 0 766 case MISCREG_ICC_EOIR0: 767 case MISCREG_ICC_EOIR0_EL1: { // End Of Interrupt Register 0 768 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 769 return setMiscReg(MISCREG_ICV_EOIR0_EL1, val); 770 } 771 772 int int_id = val & 0xffffff; 773 774 // avoid activation for special interrupts 775 if (int_id >= Gicv3::INTID_SECURE) { 776 return; 777 } 778 779 Gicv3::GroupId group = Gicv3::G0S; 780 781 if (highestActiveGroup() != group) { 782 return; 783 } 784 785 dropPriority(group); 786 787 if (!isEOISplitMode()) { 788 deactivateIRQ(int_id, group); 789 } 790 791 break; 792 } 793 794 // Virtual End Of Interrupt Register 0 795 case MISCREG_ICV_EOIR0_EL1: { 796 int int_id = val & 0xffffff; 797 798 // avoid deactivation for special interrupts 799 if (int_id >= Gicv3::INTID_SECURE && 800 int_id <= Gicv3::INTID_SPURIOUS) { 801 return; 802 } 803 804 uint8_t drop_prio = virtualDropPriority(); 805 806 if (drop_prio == 0xff) { 807 return; 808 } 809 810 int lr_idx = virtualFindActive(int_id); 811 812 if (lr_idx < 0) { 813 // No LR found matching 814 virtualIncrementEOICount(); 815 } else { 816 ICH_LR_EL2 ich_lr_el2 = 817 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 818 Gicv3::GroupId lr_group = 819 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S; 820 uint8_t lr_group_prio = ich_lr_el2.Priority & 0xf8; 821 822 if (lr_group == Gicv3::G0S && lr_group_prio == drop_prio) { 823 //if (!virtualIsEOISplitMode()) 824 { 825 virtualDeactivateIRQ(lr_idx); 826 } 827 } 828 } 829 830 virtualUpdate(); 831 break; 832 } 833 834 // End Of Interrupt Register 1 835 case MISCREG_ICC_EOIR1: 836 case MISCREG_ICC_EOIR1_EL1: { 837 if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 838 return setMiscReg(MISCREG_ICV_EOIR1_EL1, val); 839 } 840 841 int int_id = val & 0xffffff; 842 843 // avoid deactivation for special interrupts 844 if (int_id >= Gicv3::INTID_SECURE) { 845 return; 846 } 847 848 Gicv3::GroupId group = inSecureState() ? Gicv3::G1S : Gicv3::G1NS; 849 850 if (highestActiveGroup() == Gicv3::G0S) { 851 return; 852 } 853 854 if (distributor->DS == 0) { 855 if (highestActiveGroup() == Gicv3::G1S && !inSecureState()) { 856 return; 857 } else if (highestActiveGroup() == Gicv3::G1NS && 858 !(!inSecureState() or (currEL() == EL3))) { 859 return; 860 } 861 } 862 863 dropPriority(group); 864 865 if (!isEOISplitMode()) { 866 deactivateIRQ(int_id, group); 867 } 868 869 break; 870 } 871 872 // Virtual End Of Interrupt Register 1 873 case MISCREG_ICV_EOIR1_EL1: { 874 int int_id = val & 0xffffff; 875 876 // avoid deactivation for special interrupts 877 if (int_id >= Gicv3::INTID_SECURE && 878 int_id <= Gicv3::INTID_SPURIOUS) { 879 return; 880 } 881 882 uint8_t drop_prio = virtualDropPriority(); 883 884 if (drop_prio == 0xff) { 885 return; 886 } 887 888 int lr_idx = virtualFindActive(int_id); 889 890 if (lr_idx < 0) { 891 // No matching LR found 892 virtualIncrementEOICount(); 893 } else { 894 ICH_LR_EL2 ich_lr_el2 = 895 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 896 Gicv3::GroupId lr_group = 897 ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S; 898 uint8_t lr_group_prio = ich_lr_el2.Priority & 0xf8; 899 900 if (lr_group == Gicv3::G1NS && lr_group_prio == drop_prio) { 901 if (!virtualIsEOISplitMode()) { 902 virtualDeactivateIRQ(lr_idx); 903 } 904 } 905 } 906 907 virtualUpdate(); 908 break; 909 } 910 911 // Deactivate Interrupt Register 912 case MISCREG_ICC_DIR: 913 case MISCREG_ICC_DIR_EL1: { 914 if ((currEL() == EL1) && !inSecureState() && 915 (hcr_imo || hcr_fmo)) { 916 return setMiscReg(MISCREG_ICV_DIR_EL1, val); 917 } 918 919 int int_id = val & 0xffffff; 920 921 // The following checks are as per spec pseudocode 922 // aarch64/support/ICC_DIR_EL1 923 924 // Check for spurious ID 925 if (int_id >= Gicv3::INTID_SECURE) { 926 return; 927 } 928 929 // EOI mode is not set, so don't deactivate 930 if (!isEOISplitMode()) { 931 return; 932 } 933 934 Gicv3::GroupId group = 935 int_id >= 32 ? distributor->getIntGroup(int_id) : 936 redistributor->getIntGroup(int_id); 937 bool irq_is_grp0 = group == Gicv3::G0S; 938 bool single_sec_state = distributor->DS; 939 bool irq_is_secure = !single_sec_state && (group != Gicv3::G1NS); 940 SCR scr_el3 = isa->readMiscRegNoEffect(MISCREG_SCR_EL3); 941 bool route_fiq_to_el3 = scr_el3.fiq; 942 bool route_irq_to_el3 = scr_el3.irq; 943 bool route_fiq_to_el2 = hcr_fmo; 944 bool route_irq_to_el2 = hcr_imo; 945 946 switch (currEL()) { 947 case EL3: 948 break; 949 950 case EL2: 951 if (single_sec_state && irq_is_grp0 && !route_fiq_to_el3) { 952 break; 953 } 954 955 if (!irq_is_secure && !irq_is_grp0 && !route_irq_to_el3) { 956 break; 957 } 958 959 return; 960 961 case EL1: 962 if (!isSecureBelowEL3()) { 963 if (single_sec_state && irq_is_grp0 && 964 !route_fiq_to_el3 && !route_fiq_to_el2) { 965 break; 966 } 967 968 if (!irq_is_secure && !irq_is_grp0 && 969 !route_irq_to_el3 && !route_irq_to_el2) { 970 break; 971 } 972 } else { 973 if (irq_is_grp0 && !route_fiq_to_el3) { 974 break; 975 } 976 977 if (!irq_is_grp0 && 978 (!irq_is_secure || !single_sec_state) && 979 !route_irq_to_el3) { 980 break; 981 } 982 } 983 984 return; 985 986 default: 987 break; 988 } 989 990 deactivateIRQ(int_id, group); 991 break; 992 } 993 994 // Deactivate Virtual Interrupt Register 995 case MISCREG_ICV_DIR_EL1: { 996 int int_id = val & 0xffffff; 997 998 // avoid deactivation for special interrupts 999 if (int_id >= Gicv3::INTID_SECURE && 1000 int_id <= Gicv3::INTID_SPURIOUS) { 1001 return; 1002 } 1003 1004 if (!virtualIsEOISplitMode()) { 1005 return; 1006 } 1007 1008 int lr_idx = virtualFindActive(int_id); 1009 1010 if (lr_idx < 0) { 1011 // No matching LR found 1012 virtualIncrementEOICount(); 1013 } else { 1014 virtualDeactivateIRQ(lr_idx); 1015 } 1016 1017 virtualUpdate(); 1018 break; 1019 } 1020 1021 // Binary Point Register 0 1022 case MISCREG_ICC_BPR0: 1023 case MISCREG_ICC_BPR0_EL1: 1024 // Binary Point Register 1 1025 case MISCREG_ICC_BPR1: 1026 case MISCREG_ICC_BPR1_EL1: { 1027 if ((currEL() == EL1) && !inSecureState()) { 1028 if (misc_reg == MISCREG_ICC_BPR0_EL1 && hcr_fmo) { 1029 return setMiscReg(MISCREG_ICV_BPR0_EL1, val); 1030 } else if (misc_reg == MISCREG_ICC_BPR1_EL1 && hcr_imo) { 1031 return setMiscReg(MISCREG_ICV_BPR1_EL1, val); 1032 } 1033 } 1034 1035 Gicv3::GroupId group = 1036 misc_reg == MISCREG_ICC_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1S; 1037 1038 if (group == Gicv3::G1S && !inSecureState()) { 1039 group = Gicv3::G1NS; 1040 } 1041 1042 ICC_CTLR_EL1 icc_ctlr_el1_s = 1043 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S); 1044 1045 if ((group == Gicv3::G1S) && !isEL3OrMon() && 1046 icc_ctlr_el1_s.CBPR) { 1047 group = Gicv3::G0S; 1048 } 1049 1050 ICC_CTLR_EL1 icc_ctlr_el1_ns = 1051 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS); 1052 1053 if ((group == Gicv3::G1NS) && (currEL() < EL3) && 1054 icc_ctlr_el1_ns.CBPR) { 1055 // BPR0 + 1 saturated to 7, WI 1056 return; 1057 } 1058 1059 uint8_t min_val = (group == Gicv3::G1NS) ? 1060 GIC_MIN_BPR_NS : GIC_MIN_BPR; 1061 val &= 0x7; 1062 1063 if (val < min_val) { 1064 val = min_val; 1065 } 1066 1067 break; 1068 } 1069 1070 // Virtual Binary Point Register 0 1071 case MISCREG_ICV_BPR0_EL1: 1072 // Virtual Binary Point Register 1 1073 case MISCREG_ICV_BPR1_EL1: { 1074 Gicv3::GroupId group = 1075 misc_reg == MISCREG_ICV_BPR0_EL1 ? Gicv3::G0S : Gicv3::G1NS; 1076 ICH_VMCR_EL2 ich_vmcr_el2 = 1077 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 1078 1079 if ((group == Gicv3::G1NS) && ich_vmcr_el2.VCBPR) { 1080 // BPR0 + 1 saturated to 7, WI 1081 return; 1082 } 1083 1084 uint8_t min_VPBR = 7 - VIRTUAL_PREEMPTION_BITS; 1085 1086 if (group != Gicv3::G0S) { 1087 min_VPBR++; 1088 } 1089 1090 if (val < min_VPBR) { 1091 val = min_VPBR; 1092 } 1093 1094 if (group == Gicv3::G0S) { 1095 ich_vmcr_el2.VBPR0 = val; 1096 } else { 1097 ich_vmcr_el2.VBPR1 = val; 1098 } 1099 1100 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2); 1101 do_virtual_update = true; 1102 break; 1103 } 1104 1105 // Control Register EL1 1106 case MISCREG_ICC_CTLR: 1107 case MISCREG_ICC_CTLR_EL1: { 1108 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) { 1109 return setMiscReg(MISCREG_ICV_CTLR_EL1, val); 1110 } 1111 1112 /* 1113 * ExtRange is RO. 1114 * RSS is RO. 1115 * A3V is RO. 1116 * SEIS is RO. 1117 * IDbits is RO. 1118 * PRIbits is RO. 1119 */ 1120 ICC_CTLR_EL1 requested_icc_ctlr_el1 = val; 1121 ICC_CTLR_EL1 icc_ctlr_el1 = 1122 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1); 1123 1124 ICC_CTLR_EL3 icc_ctlr_el3 = 1125 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3); 1126 1127 // The following could be refactored but it is following 1128 // spec description section 9.2.6 point by point. 1129 1130 // PMHE 1131 if (haveEL(EL3)) { 1132 // PMHE is alias of ICC_CTLR_EL3.PMHE 1133 1134 if (distributor->DS == 0) { 1135 // PMHE is RO 1136 } else if (distributor->DS == 1) { 1137 // PMHE is RW 1138 icc_ctlr_el1.PMHE = requested_icc_ctlr_el1.PMHE; 1139 icc_ctlr_el3.PMHE = icc_ctlr_el1.PMHE; 1140 } 1141 } else { 1142 // PMHE is RW (by implementation choice) 1143 icc_ctlr_el1.PMHE = requested_icc_ctlr_el1.PMHE; 1144 } 1145 1146 // EOImode 1147 icc_ctlr_el1.EOImode = requested_icc_ctlr_el1.EOImode; 1148 1149 if (inSecureState()) { 1150 // EOIMode is alias of ICC_CTLR_EL3.EOImode_EL1S 1151 icc_ctlr_el3.EOImode_EL1S = icc_ctlr_el1.EOImode; 1152 } else { 1153 // EOIMode is alias of ICC_CTLR_EL3.EOImode_EL1NS 1154 icc_ctlr_el3.EOImode_EL1NS = icc_ctlr_el1.EOImode; 1155 } 1156 1157 // CBPR 1158 if (haveEL(EL3)) { 1159 // CBPR is alias of ICC_CTLR_EL3.CBPR_EL1{S,NS} 1160 1161 if (distributor->DS == 0) { 1162 // CBPR is RO 1163 } else { 1164 // CBPR is RW 1165 icc_ctlr_el1.CBPR = requested_icc_ctlr_el1.CBPR; 1166 1167 if (inSecureState()) { 1168 icc_ctlr_el3.CBPR_EL1S = icc_ctlr_el1.CBPR; 1169 } else { 1170 icc_ctlr_el3.CBPR_EL1NS = icc_ctlr_el1.CBPR; 1171 } 1172 } 1173 } else { 1174 // CBPR is RW 1175 icc_ctlr_el1.CBPR = requested_icc_ctlr_el1.CBPR; 1176 } 1177 1178 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL3, icc_ctlr_el3); 1179 1180 val = icc_ctlr_el1; 1181 break; 1182 } 1183 1184 // Virtual Control Register 1185 case MISCREG_ICV_CTLR_EL1: { 1186 ICV_CTLR_EL1 requested_icv_ctlr_el1 = val; 1187 ICV_CTLR_EL1 icv_ctlr_el1 = 1188 isa->readMiscRegNoEffect(MISCREG_ICV_CTLR_EL1); 1189 icv_ctlr_el1.EOImode = requested_icv_ctlr_el1.EOImode; 1190 icv_ctlr_el1.CBPR = requested_icv_ctlr_el1.CBPR; 1191 val = icv_ctlr_el1; 1192 1193 // Aliases 1194 // ICV_CTLR_EL1.CBPR aliases ICH_VMCR_EL2.VCBPR. 1195 // ICV_CTLR_EL1.EOImode aliases ICH_VMCR_EL2.VEOIM. 1196 ICH_VMCR_EL2 ich_vmcr_el2 = 1197 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 1198 ich_vmcr_el2.VCBPR = icv_ctlr_el1.CBPR; 1199 ich_vmcr_el2.VEOIM = icv_ctlr_el1.EOImode; 1200 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2); 1201 break; 1202 } 1203 1204 // Control Register EL3 1205 case MISCREG_ICC_MCTLR: 1206 case MISCREG_ICC_CTLR_EL3: { 1207 /* 1208 * ExtRange is RO. 1209 * RSS is RO. 1210 * nDS is RO. 1211 * A3V is RO. 1212 * SEIS is RO. 1213 * IDbits is RO. 1214 * PRIbits is RO. 1215 * PMHE is RAO/WI, priority-based routing is always used. 1216 */ 1217 ICC_CTLR_EL3 requested_icc_ctlr_el3 = val; 1218 1219 // Aliases 1220 if (haveEL(EL3)) 1221 { 1222 ICC_CTLR_EL1 icc_ctlr_el1_s = 1223 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S); 1224 ICC_CTLR_EL1 icc_ctlr_el1_ns = 1225 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS); 1226 1227 // ICC_CTLR_EL1(NS).EOImode is an alias of 1228 // ICC_CTLR_EL3.EOImode_EL1NS 1229 icc_ctlr_el1_ns.EOImode = requested_icc_ctlr_el3.EOImode_EL1NS; 1230 // ICC_CTLR_EL1(S).EOImode is an alias of 1231 // ICC_CTLR_EL3.EOImode_EL1S 1232 icc_ctlr_el1_s.EOImode = requested_icc_ctlr_el3.EOImode_EL1S; 1233 // ICC_CTLR_EL1(NS).CBPR is an alias of ICC_CTLR_EL3.CBPR_EL1NS 1234 icc_ctlr_el1_ns.CBPR = requested_icc_ctlr_el3.CBPR_EL1NS; 1235 // ICC_CTLR_EL1(S).CBPR is an alias of ICC_CTLR_EL3.CBPR_EL1S 1236 icc_ctlr_el1_s.CBPR = requested_icc_ctlr_el3.CBPR_EL1S; 1237 1238 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S, icc_ctlr_el1_s); 1239 isa->setMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS, 1240 icc_ctlr_el1_ns); 1241 } 1242 1243 ICC_CTLR_EL3 icc_ctlr_el3 = 1244 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3); 1245 1246 icc_ctlr_el3.RM = requested_icc_ctlr_el3.RM; 1247 icc_ctlr_el3.EOImode_EL1NS = requested_icc_ctlr_el3.EOImode_EL1NS; 1248 icc_ctlr_el3.EOImode_EL1S = requested_icc_ctlr_el3.EOImode_EL1S; 1249 icc_ctlr_el3.EOImode_EL3 = requested_icc_ctlr_el3.EOImode_EL3; 1250 icc_ctlr_el3.CBPR_EL1NS = requested_icc_ctlr_el3.CBPR_EL1NS; 1251 icc_ctlr_el3.CBPR_EL1S = requested_icc_ctlr_el3.CBPR_EL1S; 1252 1253 val = icc_ctlr_el3; 1254 break; 1255 } 1256 1257 // Priority Mask Register 1258 case MISCREG_ICC_PMR: 1259 case MISCREG_ICC_PMR_EL1: { 1260 if ((currEL() == EL1) && !inSecureState() && (hcr_imo || hcr_fmo)) { 1261 return isa->setMiscRegNoEffect(MISCREG_ICV_PMR_EL1, val); 1262 } 1263 1264 val &= 0xff; 1265 SCR scr_el3 = isa->readMiscRegNoEffect(MISCREG_SCR_EL3); 1266 1267 if (haveEL(EL3) && !inSecureState() && (scr_el3.fiq)) { 1268 // Spec section 4.8.1 1269 // For Non-secure access to ICC_PMR_EL1 SCR_EL3.FIQ == 1: 1270 RegVal old_icc_pmr_el1 = 1271 isa->readMiscRegNoEffect(MISCREG_ICC_PMR_EL1); 1272 1273 if (!(old_icc_pmr_el1 & 0x80)) { 1274 // If the current priority mask value is in the range of 1275 // 0x00-0x7F then WI 1276 return; 1277 } 1278 1279 // If the current priority mask value is in the range of 1280 // 0x80-0xFF then a write access to ICC_PMR_EL1 succeeds, 1281 // based on the Non-secure read of the priority mask value 1282 // written to the register. 1283 1284 val = (val >> 1) | 0x80; 1285 } 1286 1287 val &= ~0U << (8 - PRIORITY_BITS); 1288 break; 1289 } 1290 1291 // Interrupt Group 0 Enable Register EL1 1292 case MISCREG_ICC_IGRPEN0: 1293 case MISCREG_ICC_IGRPEN0_EL1: { 1294 if ((currEL() == EL1) && !inSecureState() && hcr_fmo) { 1295 return setMiscReg(MISCREG_ICV_IGRPEN0_EL1, val); 1296 } 1297 1298 break; 1299 } 1300 1301 // Virtual Interrupt Group 0 Enable register 1302 case MISCREG_ICV_IGRPEN0_EL1: { 1303 bool enable = val & 0x1; 1304 ICH_VMCR_EL2 ich_vmcr_el2 = 1305 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 1306 ich_vmcr_el2.VENG0 = enable; 1307 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2); 1308 virtualUpdate(); 1309 return; 1310 } 1311 1312 // Interrupt Group 1 Enable register EL1 1313 case MISCREG_ICC_IGRPEN1: 1314 case MISCREG_ICC_IGRPEN1_EL1: { 1315 if ((currEL() == EL1) && !inSecureState() && hcr_imo) { 1316 return setMiscReg(MISCREG_ICV_IGRPEN1_EL1, val); 1317 } 1318 1319 if (haveEL(EL3)) { 1320 ICC_IGRPEN1_EL1 icc_igrpen1_el1 = val; 1321 ICC_IGRPEN1_EL3 icc_igrpen1_el3 = 1322 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL3); 1323 1324 if (inSecureState()) { 1325 // Enable is RW alias of ICC_IGRPEN1_EL3.EnableGrp1S 1326 icc_igrpen1_el3.EnableGrp1S = icc_igrpen1_el1.Enable; 1327 } else { 1328 // Enable is RW alias of ICC_IGRPEN1_EL3.EnableGrp1NS 1329 icc_igrpen1_el3.EnableGrp1NS = icc_igrpen1_el1.Enable; 1330 } 1331 1332 isa->setMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL3, 1333 icc_igrpen1_el3); 1334 } 1335 1336 break; 1337 } 1338 1339 // Virtual Interrupt Group 1 Enable register 1340 case MISCREG_ICV_IGRPEN1_EL1: { 1341 bool enable = val & 0x1; 1342 ICH_VMCR_EL2 ich_vmcr_el2 = 1343 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 1344 ich_vmcr_el2.VENG1 = enable; 1345 isa->setMiscRegNoEffect(MISCREG_ICH_VMCR_EL2, ich_vmcr_el2); 1346 virtualUpdate(); 1347 return; 1348 } 1349 1350 // Interrupt Group 1 Enable register 1351 case MISCREG_ICC_MGRPEN1: 1352 case MISCREG_ICC_IGRPEN1_EL3: { 1353 ICC_IGRPEN1_EL3 icc_igrpen1_el3 = val; 1354 ICC_IGRPEN1_EL1 icc_igrpen1_el1 = 1355 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1); 1356 1357 if (inSecureState()) { 1358 // ICC_IGRPEN1_EL1.Enable is RW alias of EnableGrp1S 1359 icc_igrpen1_el1.Enable = icc_igrpen1_el3.EnableGrp1S; 1360 } else { 1361 // ICC_IGRPEN1_EL1.Enable is RW alias of EnableGrp1NS 1362 icc_igrpen1_el1.Enable = icc_igrpen1_el3.EnableGrp1NS; 1363 } 1364 1365 isa->setMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1, icc_igrpen1_el1); 1366 break; 1367 } 1368 1369 // Software Generated Interrupt Group 0 Register 1370 case MISCREG_ICC_SGI0R: 1371 case MISCREG_ICC_SGI0R_EL1: 1372 1373 // Software Generated Interrupt Group 1 Register 1374 case MISCREG_ICC_SGI1R: 1375 case MISCREG_ICC_SGI1R_EL1: 1376 1377 // Alias Software Generated Interrupt Group 1 Register 1378 case MISCREG_ICC_ASGI1R: 1379 case MISCREG_ICC_ASGI1R_EL1: { 1380 bool ns = !inSecureState(); 1381 Gicv3::GroupId group; 1382 1383 if (misc_reg == MISCREG_ICC_SGI1R_EL1) { 1384 group = ns ? Gicv3::G1NS : Gicv3::G1S; 1385 } else if (misc_reg == MISCREG_ICC_ASGI1R_EL1) { 1386 group = ns ? Gicv3::G1S : Gicv3::G1NS; 1387 } else { 1388 group = Gicv3::G0S; 1389 } 1390 1391 if (distributor->DS && group == Gicv3::G1S) { 1392 group = Gicv3::G0S; 1393 } 1394 1395 uint8_t aff3 = bits(val, 55, 48); 1396 uint8_t aff2 = bits(val, 39, 32); 1397 uint8_t aff1 = bits(val, 23, 16);; 1398 uint16_t target_list = bits(val, 15, 0); 1399 uint32_t int_id = bits(val, 27, 24); 1400 bool irm = bits(val, 40, 40); 1401 uint8_t rs = bits(val, 47, 44); 1402 1403 for (int i = 0; i < gic->getSystem()->numContexts(); i++) { 1404 Gicv3Redistributor * redistributor_i = 1405 gic->getRedistributor(i); 1406 uint32_t affinity_i = redistributor_i->getAffinity(); 1407 1408 if (irm) { 1409 // Interrupts routed to all PEs in the system, 1410 // excluding "self" 1411 if (affinity_i == redistributor->getAffinity()) { 1412 continue; 1413 } 1414 } else { 1415 // Interrupts routed to the PEs specified by 1416 // Aff3.Aff2.Aff1.<target list> 1417 if ((affinity_i >> 8) != 1418 ((aff3 << 16) | (aff2 << 8) | (aff1 << 0))) { 1419 continue; 1420 } 1421 1422 uint8_t aff0_i = bits(affinity_i, 7, 0); 1423 1424 if (!(aff0_i >= rs * 16 && aff0_i < (rs + 1) * 16 && 1425 ((0x1 << (aff0_i - rs * 16)) & target_list))) { 1426 continue; 1427 } 1428 } 1429 1430 redistributor_i->sendSGI(int_id, group, ns); 1431 } 1432 1433 break; 1434 } 1435 1436 // System Register Enable Register EL1 1437 case MISCREG_ICC_SRE: 1438 case MISCREG_ICC_SRE_EL1: 1439 // System Register Enable Register EL2 1440 case MISCREG_ICC_HSRE: 1441 case MISCREG_ICC_SRE_EL2: 1442 // System Register Enable Register EL3 1443 case MISCREG_ICC_MSRE: 1444 case MISCREG_ICC_SRE_EL3: 1445 // All bits are RAO/WI 1446 return; 1447 1448 // Hyp Control Register 1449 case MISCREG_ICH_HCR: 1450 case MISCREG_ICH_HCR_EL2: { 1451 ICH_HCR_EL2 requested_ich_hcr_el2 = val; 1452 ICH_HCR_EL2 ich_hcr_el2 = 1453 isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2); 1454 1455 if (requested_ich_hcr_el2.EOIcount >= ich_hcr_el2.EOIcount) 1456 { 1457 // EOIcount - Permitted behaviors are: 1458 // - Increment EOIcount. 1459 // - Leave EOIcount unchanged. 1460 ich_hcr_el2.EOIcount = requested_ich_hcr_el2.EOIcount; 1461 } 1462 1463 ich_hcr_el2.TDIR = requested_ich_hcr_el2.TDIR; 1464 ich_hcr_el2.TSEI = requested_ich_hcr_el2.TSEI; 1465 ich_hcr_el2.TALL1 = requested_ich_hcr_el2.TALL1;; 1466 ich_hcr_el2.TALL0 = requested_ich_hcr_el2.TALL0;; 1467 ich_hcr_el2.TC = requested_ich_hcr_el2.TC; 1468 ich_hcr_el2.VGrp1DIE = requested_ich_hcr_el2.VGrp1DIE; 1469 ich_hcr_el2.VGrp1EIE = requested_ich_hcr_el2.VGrp1EIE; 1470 ich_hcr_el2.VGrp0DIE = requested_ich_hcr_el2.VGrp0DIE; 1471 ich_hcr_el2.VGrp0EIE = requested_ich_hcr_el2.VGrp0EIE; 1472 ich_hcr_el2.NPIE = requested_ich_hcr_el2.NPIE; 1473 ich_hcr_el2.LRENPIE = requested_ich_hcr_el2.LRENPIE; 1474 ich_hcr_el2.UIE = requested_ich_hcr_el2.UIE; 1475 ich_hcr_el2.En = requested_ich_hcr_el2.En; 1476 val = ich_hcr_el2; 1477 do_virtual_update = true; 1478 break; 1479 } 1480 1481 // List Registers 1482 case MISCREG_ICH_LRC0 ... MISCREG_ICH_LRC15: { 1483 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 high half part) 1484 ICH_LRC requested_ich_lrc = val; 1485 ICH_LRC ich_lrc = isa->readMiscRegNoEffect(misc_reg); 1486 1487 ich_lrc.State = requested_ich_lrc.State; 1488 ich_lrc.HW = requested_ich_lrc.HW; 1489 ich_lrc.Group = requested_ich_lrc.Group; 1490 1491 // Priority, bits [23:16] 1492 // At least five bits must be implemented. 1493 // Unimplemented bits are RES0 and start from bit[16] up to bit[18]. 1494 // We implement 5 bits. 1495 ich_lrc.Priority = (requested_ich_lrc.Priority & 0xf8) | 1496 (ich_lrc.Priority & 0x07); 1497 1498 // pINTID, bits [12:0] 1499 // When ICH_LR<n>.HW is 0 this field has the following meaning: 1500 // - Bits[12:10] : RES0. 1501 // - Bit[9] : EOI. 1502 // - Bits[8:0] : RES0. 1503 // When ICH_LR<n>.HW is 1: 1504 // - This field is only required to implement enough bits to hold a 1505 // valid value for the implemented INTID size. Any unused higher 1506 // order bits are RES0. 1507 if (requested_ich_lrc.HW == 0) { 1508 ich_lrc.EOI = requested_ich_lrc.EOI; 1509 } else { 1510 ich_lrc.pINTID = requested_ich_lrc.pINTID; 1511 } 1512 1513 val = ich_lrc; 1514 do_virtual_update = true; 1515 break; 1516 } 1517 1518 // List Registers 1519 case MISCREG_ICH_LR0 ... MISCREG_ICH_LR15: { 1520 // AArch32 (maps to AArch64 MISCREG_ICH_LR<n>_EL2 low half part) 1521 RegVal old_val = isa->readMiscRegNoEffect(misc_reg); 1522 val = (old_val & 0xffffffff00000000) | (val & 0xffffffff); 1523 do_virtual_update = true; 1524 break; 1525 } 1526 1527 // List Registers 1528 case MISCREG_ICH_LR0_EL2 ... MISCREG_ICH_LR15_EL2: { // AArch64 1529 ICH_LR_EL2 requested_ich_lr_el2 = val; 1530 ICH_LR_EL2 ich_lr_el2 = isa->readMiscRegNoEffect(misc_reg); 1531 1532 ich_lr_el2.State = requested_ich_lr_el2.State; 1533 ich_lr_el2.HW = requested_ich_lr_el2.HW; 1534 ich_lr_el2.Group = requested_ich_lr_el2.Group; 1535 1536 // Priority, bits [55:48] 1537 // At least five bits must be implemented. 1538 // Unimplemented bits are RES0 and start from bit[48] up to bit[50]. 1539 // We implement 5 bits. 1540 ich_lr_el2.Priority = (requested_ich_lr_el2.Priority & 0xf8) | 1541 (ich_lr_el2.Priority & 0x07); 1542 1543 // pINTID, bits [44:32] 1544 // When ICH_LR<n>_EL2.HW is 0 this field has the following meaning: 1545 // - Bits[44:42] : RES0. 1546 // - Bit[41] : EOI. 1547 // - Bits[40:32] : RES0. 1548 // When ICH_LR<n>_EL2.HW is 1: 1549 // - This field is only required to implement enough bits to hold a 1550 // valid value for the implemented INTID size. Any unused higher 1551 // order bits are RES0. 1552 if (requested_ich_lr_el2.HW == 0) { 1553 ich_lr_el2.EOI = requested_ich_lr_el2.EOI; 1554 } else { 1555 ich_lr_el2.pINTID = requested_ich_lr_el2.pINTID; 1556 } 1557 1558 // vINTID, bits [31:0] 1559 // It is IMPLEMENTATION DEFINED how many bits are implemented, 1560 // though at least 16 bits must be implemented. 1561 // Unimplemented bits are RES0. 1562 ich_lr_el2.vINTID = requested_ich_lr_el2.vINTID; 1563 1564 val = ich_lr_el2; 1565 do_virtual_update = true; 1566 break; 1567 } 1568 1569 // Virtual Machine Control Register 1570 case MISCREG_ICH_VMCR: 1571 case MISCREG_ICH_VMCR_EL2: { 1572 ICH_VMCR_EL2 requested_ich_vmcr_el2 = val; 1573 ICH_VMCR_EL2 ich_vmcr_el2 = 1574 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 1575 ich_vmcr_el2.VPMR = requested_ich_vmcr_el2.VPMR; 1576 uint8_t min_vpr0 = 7 - VIRTUAL_PREEMPTION_BITS; 1577 1578 if (requested_ich_vmcr_el2.VBPR0 < min_vpr0) { 1579 ich_vmcr_el2.VBPR0 = min_vpr0; 1580 } else { 1581 ich_vmcr_el2.VBPR0 = requested_ich_vmcr_el2.VBPR0; 1582 } 1583 1584 uint8_t min_vpr1 = min_vpr0 + 1; 1585 1586 if (requested_ich_vmcr_el2.VBPR1 < min_vpr1) { 1587 ich_vmcr_el2.VBPR1 = min_vpr1; 1588 } else { 1589 ich_vmcr_el2.VBPR1 = requested_ich_vmcr_el2.VBPR1; 1590 } 1591 1592 ich_vmcr_el2.VEOIM = requested_ich_vmcr_el2.VEOIM; 1593 ich_vmcr_el2.VCBPR = requested_ich_vmcr_el2.VCBPR; 1594 ich_vmcr_el2.VENG1 = requested_ich_vmcr_el2.VENG1; 1595 ich_vmcr_el2.VENG0 = requested_ich_vmcr_el2.VENG0; 1596 val = ich_vmcr_el2; 1597 break; 1598 } 1599 1600 // Hyp Active Priorities Group 0 Registers 1601 case MISCREG_ICH_AP0R0 ... MISCREG_ICH_AP0R3: 1602 case MISCREG_ICH_AP0R0_EL2 ... MISCREG_ICH_AP0R3_EL2: 1603 // Hyp Active Priorities Group 1 Registers 1604 case MISCREG_ICH_AP1R0 ... MISCREG_ICH_AP1R3: 1605 case MISCREG_ICH_AP1R0_EL2 ... MISCREG_ICH_AP1R3_EL2: 1606 break; 1607 1608 default: 1609 panic("Gicv3CPUInterface::setMiscReg(): unknown register %d (%s)", 1610 misc_reg, miscRegName[misc_reg]); 1611 } 1612 1613 isa->setMiscRegNoEffect(misc_reg, val); 1614 1615 if (do_virtual_update) { 1616 virtualUpdate(); 1617 } 1618} 1619 1620int 1621Gicv3CPUInterface::virtualFindActive(uint32_t int_id) const 1622{ 1623 for (uint32_t lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) { 1624 ICH_LR_EL2 ich_lr_el2 = 1625 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 1626 1627 if (((ich_lr_el2.State == ICH_LR_EL2_STATE_ACTIVE) || 1628 (ich_lr_el2.State == ICH_LR_EL2_STATE_ACTIVE_PENDING)) && 1629 (ich_lr_el2.vINTID == int_id)) { 1630 return lr_idx; 1631 } 1632 } 1633 1634 return -1; 1635} 1636 1637uint32_t 1638Gicv3CPUInterface::getHPPIR0() const 1639{ 1640 if (hppi.prio == 0xff) { 1641 return Gicv3::INTID_SPURIOUS; 1642 } 1643 1644 bool irq_is_secure = !distributor->DS && hppi.group != Gicv3::G1NS; 1645 1646 if ((hppi.group != Gicv3::G0S) && isEL3OrMon()) { 1647 // interrupt for the other state pending 1648 return irq_is_secure ? Gicv3::INTID_SECURE : Gicv3::INTID_NONSECURE; 1649 } 1650 1651 if ((hppi.group != Gicv3::G0S)) { // && !isEL3OrMon()) 1652 return Gicv3::INTID_SPURIOUS; 1653 } 1654 1655 if (irq_is_secure && !inSecureState()) { 1656 // Secure interrupts not visible in Non-secure 1657 return Gicv3::INTID_SPURIOUS; 1658 } 1659 1660 return hppi.intid; 1661} 1662 1663uint32_t 1664Gicv3CPUInterface::getHPPIR1() const 1665{ 1666 if (hppi.prio == 0xff) { 1667 return Gicv3::INTID_SPURIOUS; 1668 } 1669 1670 ICC_CTLR_EL3 icc_ctlr_el3 = isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3); 1671 if ((currEL() == EL3) && icc_ctlr_el3.RM) { 1672 if (hppi.group == Gicv3::G0S) { 1673 return Gicv3::INTID_SECURE; 1674 } else if (hppi.group == Gicv3::G1NS) { 1675 return Gicv3::INTID_NONSECURE; 1676 } 1677 } 1678 1679 if (hppi.group == Gicv3::G0S) { 1680 return Gicv3::INTID_SPURIOUS; 1681 } 1682 1683 bool irq_is_secure = (distributor->DS == 0) && (hppi.group != Gicv3::G1NS); 1684 1685 if (irq_is_secure) { 1686 if (!inSecureState()) { 1687 // Secure interrupts not visible in Non-secure 1688 return Gicv3::INTID_SPURIOUS; 1689 } 1690 } else if (!isEL3OrMon() && inSecureState()) { 1691 // Group 1 non-secure interrupts not visible in Secure EL1 1692 return Gicv3::INTID_SPURIOUS; 1693 } 1694 1695 return hppi.intid; 1696} 1697 1698void 1699Gicv3CPUInterface::dropPriority(Gicv3::GroupId group) 1700{ 1701 int apr_misc_reg; 1702 RegVal apr; 1703 apr_misc_reg = group == Gicv3::G0S ? 1704 MISCREG_ICC_AP0R0_EL1 : MISCREG_ICC_AP1R0_EL1; 1705 apr = isa->readMiscRegNoEffect(apr_misc_reg); 1706 1707 if (apr) { 1708 apr &= apr - 1; 1709 isa->setMiscRegNoEffect(apr_misc_reg, apr); 1710 } 1711 1712 update(); 1713} 1714 1715uint8_t 1716Gicv3CPUInterface::virtualDropPriority() 1717{ 1718 int apr_max = 1 << (VIRTUAL_PREEMPTION_BITS - 5); 1719 1720 for (int i = 0; i < apr_max; i++) { 1721 RegVal vapr0 = isa->readMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i); 1722 RegVal vapr1 = isa->readMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i); 1723 1724 if (!vapr0 && !vapr1) { 1725 continue; 1726 } 1727 1728 int vapr0_count = ctz32(vapr0); 1729 int vapr1_count = ctz32(vapr1); 1730 1731 if (vapr0_count <= vapr1_count) { 1732 vapr0 &= vapr0 - 1; 1733 isa->setMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i, vapr0); 1734 return (vapr0_count + i * 32) << (GIC_MIN_VBPR + 1); 1735 } else { 1736 vapr1 &= vapr1 - 1; 1737 isa->setMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i, vapr1); 1738 return (vapr1_count + i * 32) << (GIC_MIN_VBPR + 1); 1739 } 1740 } 1741 1742 return 0xff; 1743} 1744 1745void 1746Gicv3CPUInterface::activateIRQ(uint32_t int_id, Gicv3::GroupId group) 1747{ 1748 // Update active priority registers. 1749 uint32_t prio = hppi.prio & 0xf8; 1750 int apr_bit = prio >> (8 - PRIORITY_BITS); 1751 int reg_bit = apr_bit % 32; 1752 int apr_idx = group == Gicv3::G0S ? 1753 MISCREG_ICC_AP0R0_EL1 : MISCREG_ICC_AP1R0_EL1; 1754 RegVal apr = isa->readMiscRegNoEffect(apr_idx); 1755 apr |= (1 << reg_bit); 1756 isa->setMiscRegNoEffect(apr_idx, apr); 1757 1758 // Move interrupt state from pending to active. 1759 if (int_id < Gicv3::SGI_MAX + Gicv3::PPI_MAX) { 1760 // SGI or PPI, redistributor 1761 redistributor->activateIRQ(int_id); 1762 redistributor->updateAndInformCPUInterface(); 1763 } else if (int_id < Gicv3::INTID_SECURE) { 1764 // SPI, distributor 1765 distributor->activateIRQ(int_id); 1766 distributor->updateAndInformCPUInterfaces(); 1767 } 1768} 1769 1770void 1771Gicv3CPUInterface::virtualActivateIRQ(uint32_t lr_idx) 1772{ 1773 // Update active priority registers. 1774 ICH_LR_EL2 ich_lr_el = isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + 1775 lr_idx); 1776 Gicv3::GroupId group = ich_lr_el.Group ? Gicv3::G1NS : Gicv3::G0S; 1777 uint8_t prio = ich_lr_el.Priority & 0xf8; 1778 int apr_bit = prio >> (8 - VIRTUAL_PREEMPTION_BITS); 1779 int reg_no = apr_bit / 32; 1780 int reg_bit = apr_bit % 32; 1781 int apr_idx = group == Gicv3::G0S ? 1782 MISCREG_ICH_AP0R0_EL2 + reg_no : MISCREG_ICH_AP1R0_EL2 + reg_no; 1783 RegVal apr = isa->readMiscRegNoEffect(apr_idx); 1784 apr |= (1 << reg_bit); 1785 isa->setMiscRegNoEffect(apr_idx, apr); 1786 // Move interrupt state from pending to active. 1787 ich_lr_el.State = ICH_LR_EL2_STATE_ACTIVE; 1788 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, ich_lr_el); 1789} 1790 1791void 1792Gicv3CPUInterface::deactivateIRQ(uint32_t int_id, Gicv3::GroupId group) 1793{ 1794 if (int_id < Gicv3::SGI_MAX + Gicv3::PPI_MAX) { 1795 // SGI or PPI, redistributor 1796 redistributor->deactivateIRQ(int_id); 1797 redistributor->updateAndInformCPUInterface(); 1798 } else if (int_id < Gicv3::INTID_SECURE) { 1799 // SPI, distributor 1800 distributor->deactivateIRQ(int_id); 1801 distributor->updateAndInformCPUInterfaces(); 1802 } else { 1803 return; 1804 } 1805} 1806 1807void 1808Gicv3CPUInterface::virtualDeactivateIRQ(int lr_idx) 1809{ 1810 ICH_LR_EL2 ich_lr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + 1811 lr_idx); 1812 1813 if (ich_lr_el2.HW) { 1814 // Deactivate the associated physical interrupt 1815 if (ich_lr_el2.pINTID < Gicv3::INTID_SECURE) { 1816 Gicv3::GroupId group = ich_lr_el2.pINTID >= 32 ? 1817 distributor->getIntGroup(ich_lr_el2.pINTID) : 1818 redistributor->getIntGroup(ich_lr_el2.pINTID); 1819 deactivateIRQ(ich_lr_el2.pINTID, group); 1820 } 1821 } 1822 1823 // Remove the active bit 1824 ich_lr_el2.State = ich_lr_el2.State & ~ICH_LR_EL2_STATE_ACTIVE; 1825 isa->setMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx, ich_lr_el2); 1826} 1827 1828/* 1829 * Returns the priority group field for the current BPR value for the group. 1830 * GroupBits() Pseudocode from spec. 1831 */ 1832uint32_t 1833Gicv3CPUInterface::groupPriorityMask(Gicv3::GroupId group) const 1834{ 1835 ICC_CTLR_EL1 icc_ctlr_el1_s = 1836 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_S); 1837 ICC_CTLR_EL1 icc_ctlr_el1_ns = 1838 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1_NS); 1839 1840 if ((group == Gicv3::G1S && icc_ctlr_el1_s.CBPR) || 1841 (group == Gicv3::G1NS && icc_ctlr_el1_ns.CBPR)) { 1842 group = Gicv3::G0S; 1843 } 1844 1845 int bpr; 1846 1847 if (group == Gicv3::G0S) { 1848 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR0_EL1) & 0x7; 1849 } else { 1850 bpr = isa->readMiscRegNoEffect(MISCREG_ICC_BPR1_EL1) & 0x7; 1851 } 1852 1853 if (group == Gicv3::G1NS) { 1854 assert(bpr > 0); 1855 bpr--; 1856 } 1857 1858 return ~0U << (bpr + 1); 1859} 1860 1861uint32_t 1862Gicv3CPUInterface::virtualGroupPriorityMask(Gicv3::GroupId group) const 1863{ 1864 ICH_VMCR_EL2 ich_vmcr_el2 = 1865 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 1866 1867 if ((group == Gicv3::G1NS) && ich_vmcr_el2.VCBPR) { 1868 group = Gicv3::G0S; 1869 } 1870 1871 int bpr; 1872 1873 if (group == Gicv3::G0S) { 1874 bpr = ich_vmcr_el2.VBPR0; 1875 } else { 1876 bpr = ich_vmcr_el2.VBPR1; 1877 } 1878 1879 if (group == Gicv3::G1NS) { 1880 assert(bpr > 0); 1881 bpr--; 1882 } 1883 1884 return ~0U << (bpr + 1); 1885} 1886 1887bool 1888Gicv3CPUInterface::isEOISplitMode() const 1889{ 1890 if (isEL3OrMon()) { 1891 ICC_CTLR_EL3 icc_ctlr_el3 = 1892 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL3); 1893 return icc_ctlr_el3.EOImode_EL3; 1894 } else { 1895 ICC_CTLR_EL1 icc_ctlr_el1 = 1896 isa->readMiscRegNoEffect(MISCREG_ICC_CTLR_EL1); 1897 return icc_ctlr_el1.EOImode; 1898 } 1899} 1900 1901bool 1902Gicv3CPUInterface::virtualIsEOISplitMode() const 1903{ 1904 ICH_VMCR_EL2 ich_vmcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 1905 return ich_vmcr_el2.VEOIM; 1906} 1907 1908int 1909Gicv3CPUInterface::highestActiveGroup() const 1910{ 1911 int g0_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP0R0_EL1)); 1912 int gq_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_S)); 1913 int g1nz_ctz = ctz32(isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_NS)); 1914 1915 if (g1nz_ctz < g0_ctz && g1nz_ctz < gq_ctz) { 1916 return Gicv3::G1NS; 1917 } 1918 1919 if (gq_ctz < g0_ctz) { 1920 return Gicv3::G1S; 1921 } 1922 1923 if (g0_ctz < 32) { 1924 return Gicv3::G0S; 1925 } 1926 1927 return -1; 1928} 1929 1930void 1931Gicv3CPUInterface::update() 1932{ 1933 bool signal_IRQ = false; 1934 bool signal_FIQ = false; 1935 1936 if (hppi.group == Gicv3::G1S && !haveEL(EL3)) { 1937 /* 1938 * Secure enabled GIC sending a G1S IRQ to a secure disabled 1939 * CPU -> send G0 IRQ 1940 */ 1941 hppi.group = Gicv3::G0S; 1942 } 1943 1944 if (hppiCanPreempt()) { 1945 ArmISA::InterruptTypes int_type = intSignalType(hppi.group); 1946 DPRINTF(GIC, "Gicv3CPUInterface::update(): " 1947 "posting int as %d!\n", int_type); 1948 int_type == ArmISA::INT_IRQ ? signal_IRQ = true : signal_FIQ = true; 1949 } 1950 1951 if (signal_IRQ) { 1952 gic->postInt(cpuId, ArmISA::INT_IRQ); 1953 } else { 1954 gic->deassertInt(cpuId, ArmISA::INT_IRQ); 1955 } 1956 1957 if (signal_FIQ) { 1958 gic->postInt(cpuId, ArmISA::INT_FIQ); 1959 } else { 1960 gic->deassertInt(cpuId, ArmISA::INT_FIQ); 1961 } 1962} 1963 1964void 1965Gicv3CPUInterface::virtualUpdate() 1966{ 1967 bool signal_IRQ = false; 1968 bool signal_FIQ = false; 1969 int lr_idx = getHPPVILR(); 1970 1971 if (lr_idx >= 0) { 1972 ICH_LR_EL2 ich_lr_el2 = 1973 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 1974 1975 if (hppviCanPreempt(lr_idx)) { 1976 if (ich_lr_el2.Group) { 1977 signal_IRQ = true; 1978 } else { 1979 signal_FIQ = true; 1980 } 1981 } 1982 } 1983 1984 ICH_HCR_EL2 ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2); 1985 1986 if (ich_hcr_el2.En) { 1987 if (maintenanceInterruptStatus()) { 1988 redistributor->sendPPInt(25); 1989 } 1990 } 1991 1992 if (signal_IRQ) { 1993 DPRINTF(GIC, "Gicv3CPUInterface::virtualUpdate(): " 1994 "posting int as %d!\n", ArmISA::INT_VIRT_IRQ); 1995 gic->postInt(cpuId, ArmISA::INT_VIRT_IRQ); 1996 } else { 1997 gic->deassertInt(cpuId, ArmISA::INT_VIRT_IRQ); 1998 } 1999 2000 if (signal_FIQ) { 2001 DPRINTF(GIC, "Gicv3CPUInterface::virtualUpdate(): " 2002 "posting int as %d!\n", ArmISA::INT_VIRT_FIQ); 2003 gic->postInt(cpuId, ArmISA::INT_VIRT_FIQ); 2004 } else { 2005 gic->deassertInt(cpuId, ArmISA::INT_VIRT_FIQ); 2006 } 2007} 2008 2009// Returns the index of the LR with the HPPI 2010int 2011Gicv3CPUInterface::getHPPVILR() const 2012{ 2013 int idx = -1; 2014 ICH_VMCR_EL2 ich_vmcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 2015 2016 if (!ich_vmcr_el2.VENG0 && !ich_vmcr_el2.VENG1) { 2017 // VG0 and VG1 disabled... 2018 return idx; 2019 } 2020 2021 uint8_t highest_prio = 0xff; 2022 2023 for (int i = 0; i < 16; i++) { 2024 ICH_LR_EL2 ich_lr_el2 = 2025 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + i); 2026 2027 if (ich_lr_el2.State != Gicv3::INT_PENDING) { 2028 continue; 2029 } 2030 2031 if (ich_lr_el2.Group) { 2032 // VG1 2033 if (!ich_vmcr_el2.VENG1) { 2034 continue; 2035 } 2036 } else { 2037 // VG0 2038 if (!ich_vmcr_el2.VENG0) { 2039 continue; 2040 } 2041 } 2042 2043 uint8_t prio = ich_lr_el2.Priority; 2044 2045 if (prio < highest_prio) { 2046 highest_prio = prio; 2047 idx = i; 2048 } 2049 } 2050 2051 return idx; 2052} 2053 2054bool 2055Gicv3CPUInterface::hppviCanPreempt(int lr_idx) const 2056{ 2057 ICH_HCR_EL2 ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2); 2058 if (!ich_hcr_el2.En) { 2059 // virtual interface is disabled 2060 return false; 2061 } 2062 2063 ICH_LR_EL2 ich_lr_el2 = 2064 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 2065 uint8_t prio = ich_lr_el2.Priority; 2066 uint8_t vpmr = 2067 bits(isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2), 31, 24); 2068 2069 if (prio >= vpmr) { 2070 // prioriry masked 2071 return false; 2072 } 2073 2074 uint8_t rprio = virtualHighestActivePriority(); 2075 2076 if (rprio == 0xff) { 2077 return true; 2078 } 2079 2080 Gicv3::GroupId group = ich_lr_el2.Group ? Gicv3::G1NS : Gicv3::G0S; 2081 uint32_t prio_mask = virtualGroupPriorityMask(group); 2082 2083 if ((prio & prio_mask) < (rprio & prio_mask)) { 2084 return true; 2085 } 2086 2087 return false; 2088} 2089 2090uint8_t 2091Gicv3CPUInterface::virtualHighestActivePriority() const 2092{ 2093 uint8_t num_aprs = 1 << (VIRTUAL_PRIORITY_BITS - 5); 2094 2095 for (int i = 0; i < num_aprs; i++) { 2096 RegVal vapr = 2097 isa->readMiscRegNoEffect(MISCREG_ICH_AP0R0_EL2 + i) | 2098 isa->readMiscRegNoEffect(MISCREG_ICH_AP1R0_EL2 + i); 2099 2100 if (!vapr) { 2101 continue; 2102 } 2103 2104 return (i * 32 + ctz32(vapr)) << (GIC_MIN_VBPR + 1); 2105 } 2106 2107 // no active interrups, return idle priority 2108 return 0xff; 2109} 2110 2111void 2112Gicv3CPUInterface::virtualIncrementEOICount() 2113{ 2114 // Increment the EOICOUNT field in ICH_HCR_EL2 2115 RegVal ich_hcr_el2 = isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2); 2116 uint32_t EOI_cout = bits(ich_hcr_el2, 31, 27); 2117 EOI_cout++; 2118 ich_hcr_el2 = insertBits(ich_hcr_el2, 31, 27, EOI_cout); 2119 isa->setMiscRegNoEffect(MISCREG_ICH_HCR_EL2, ich_hcr_el2); 2120} 2121 2122// spec section 4.6.2 2123ArmISA::InterruptTypes 2124Gicv3CPUInterface::intSignalType(Gicv3::GroupId group) const 2125{ 2126 bool is_fiq = false; 2127 2128 switch (group) { 2129 case Gicv3::G0S: 2130 is_fiq = true; 2131 break; 2132 2133 case Gicv3::G1S: 2134 is_fiq = (distributor->DS == 0) && 2135 (!inSecureState() || ((currEL() == EL3) && isAA64())); 2136 break; 2137 2138 case Gicv3::G1NS: 2139 is_fiq = (distributor->DS == 0) && inSecureState(); 2140 break; 2141 2142 default: 2143 panic("Gicv3CPUInterface::intSignalType(): invalid group!"); 2144 } 2145 2146 if (is_fiq) { 2147 return ArmISA::INT_FIQ; 2148 } else { 2149 return ArmISA::INT_IRQ; 2150 } 2151} 2152 2153bool 2154Gicv3CPUInterface::hppiCanPreempt() const 2155{ 2156 if (hppi.prio == 0xff) { 2157 // there is no pending interrupt 2158 return false; 2159 } 2160 2161 if (!groupEnabled(hppi.group)) { 2162 // group disabled at CPU interface 2163 return false; 2164 } 2165 2166 if (hppi.prio >= isa->readMiscRegNoEffect(MISCREG_ICC_PMR_EL1)) { 2167 // priority masked 2168 return false; 2169 } 2170 2171 uint8_t rprio = highestActivePriority(); 2172 2173 if (rprio == 0xff) { 2174 return true; 2175 } 2176 2177 uint32_t prio_mask = groupPriorityMask(hppi.group); 2178 2179 if ((hppi.prio & prio_mask) < (rprio & prio_mask)) { 2180 return true; 2181 } 2182 2183 return false; 2184} 2185 2186uint8_t 2187Gicv3CPUInterface::highestActivePriority() const 2188{ 2189 uint32_t apr = isa->readMiscRegNoEffect(MISCREG_ICC_AP0R0_EL1) | 2190 isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_NS) | 2191 isa->readMiscRegNoEffect(MISCREG_ICC_AP1R0_EL1_S); 2192 2193 if (apr) { 2194 return ctz32(apr) << (GIC_MIN_BPR + 1); 2195 } 2196 2197 // no active interrups, return idle priority 2198 return 0xff; 2199} 2200 2201bool 2202Gicv3CPUInterface::groupEnabled(Gicv3::GroupId group) const 2203{ 2204 switch (group) { 2205 case Gicv3::G0S: { 2206 ICC_IGRPEN0_EL1 icc_igrpen0_el1 = 2207 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN0_EL1); 2208 return icc_igrpen0_el1.Enable; 2209 } 2210 2211 case Gicv3::G1S: { 2212 ICC_IGRPEN1_EL1 icc_igrpen1_el1_s = 2213 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_S); 2214 return icc_igrpen1_el1_s.Enable; 2215 } 2216 2217 case Gicv3::G1NS: { 2218 ICC_IGRPEN1_EL1 icc_igrpen1_el1_ns = 2219 isa->readMiscRegNoEffect(MISCREG_ICC_IGRPEN1_EL1_NS); 2220 return icc_igrpen1_el1_ns.Enable; 2221 } 2222 2223 default: 2224 panic("Gicv3CPUInterface::groupEnable(): invalid group!\n"); 2225 } 2226} 2227 2228bool 2229Gicv3CPUInterface::inSecureState() const 2230{ 2231 if (!gic->getSystem()->haveSecurity()) { 2232 return false; 2233 } 2234 2235 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR); 2236 SCR scr = isa->readMiscRegNoEffect(MISCREG_SCR); 2237 return ArmISA::inSecureState(scr, cpsr); 2238} 2239 2240int 2241Gicv3CPUInterface::currEL() const 2242{ 2243 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR); 2244 bool is_64 = opModeIs64((OperatingMode)(uint8_t) cpsr.mode); 2245 2246 if (is_64) { 2247 return (ExceptionLevel)(uint8_t) cpsr.el; 2248 } else { 2249 switch (cpsr.mode) { 2250 case MODE_USER: 2251 return 0; 2252 2253 case MODE_HYP: 2254 return 2; 2255 2256 case MODE_MON: 2257 return 3; 2258 2259 default: 2260 return 1; 2261 } 2262 } 2263} 2264 2265bool 2266Gicv3CPUInterface::haveEL(ExceptionLevel el) const 2267{ 2268 switch (el) { 2269 case EL0: 2270 case EL1: 2271 return true; 2272 2273 case EL2: 2274 return gic->getSystem()->haveVirtualization(); 2275 2276 case EL3: 2277 return gic->getSystem()->haveSecurity(); 2278 2279 default: 2280 warn("Unimplemented Exception Level\n"); 2281 return false; 2282 } 2283} 2284 2285bool 2286Gicv3CPUInterface::isSecureBelowEL3() const 2287{ 2288 SCR scr = isa->readMiscRegNoEffect(MISCREG_SCR_EL3); 2289 return haveEL(EL3) && scr.ns == 0; 2290} 2291 2292bool 2293Gicv3CPUInterface::isAA64() const 2294{ 2295 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR); 2296 return opModeIs64((OperatingMode)(uint8_t) cpsr.mode); 2297} 2298 2299bool 2300Gicv3CPUInterface::isEL3OrMon() const 2301{ 2302 if (haveEL(EL3)) { 2303 CPSR cpsr = isa->readMiscRegNoEffect(MISCREG_CPSR); 2304 bool is_64 = opModeIs64((OperatingMode)(uint8_t) cpsr.mode); 2305 2306 if (is_64 && (cpsr.el == EL3)) { 2307 return true; 2308 } else if (!is_64 && (cpsr.mode == MODE_MON)) { 2309 return true; 2310 } 2311 } 2312 2313 return false; 2314} 2315 2316// Computes ICH_EISR_EL2 2317uint64_t 2318Gicv3CPUInterface::eoiMaintenanceInterruptStatus() const 2319{ 2320 // ICH_EISR_EL2 2321 // Bits [63:16] - RES0 2322 // Status<n>, bit [n], for n = 0 to 15 2323 // EOI maintenance interrupt status bit for List register <n>: 2324 // 0 if List register <n>, ICH_LR<n>_EL2, does not have an EOI 2325 // maintenance interrupt. 2326 // 1 if List register <n>, ICH_LR<n>_EL2, has an EOI maintenance 2327 // interrupt that has not been handled. 2328 // 2329 // For any ICH_LR<n>_EL2, the corresponding status bit is set to 1 if all 2330 // of the following are true: 2331 // - ICH_LR<n>_EL2.State is 0b00 (ICH_LR_EL2_STATE_INVALID). 2332 // - ICH_LR<n>_EL2.HW is 0. 2333 // - ICH_LR<n>_EL2.EOI (bit [41]) is 1. 2334 2335 uint64_t value = 0; 2336 2337 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) { 2338 ICH_LR_EL2 ich_lr_el2 = 2339 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 2340 2341 if ((ich_lr_el2.State == ICH_LR_EL2_STATE_INVALID) && 2342 !ich_lr_el2.HW && ich_lr_el2.EOI) { 2343 value |= (1 << lr_idx); 2344 } 2345 } 2346 2347 return value; 2348} 2349 2350Gicv3CPUInterface::ICH_MISR_EL2 2351Gicv3CPUInterface::maintenanceInterruptStatus() const 2352{ 2353 // Comments are copied from SPEC section 9.4.7 (ID012119) 2354 ICH_MISR_EL2 ich_misr_el2 = 0; 2355 ICH_HCR_EL2 ich_hcr_el2 = 2356 isa->readMiscRegNoEffect(MISCREG_ICH_HCR_EL2); 2357 ICH_VMCR_EL2 ich_vmcr_el2 = 2358 isa->readMiscRegNoEffect(MISCREG_ICH_VMCR_EL2); 2359 2360 // End Of Interrupt. [bit 0] 2361 // This maintenance interrupt is asserted when at least one bit in 2362 // ICH_EISR_EL2 is 1. 2363 2364 if (eoiMaintenanceInterruptStatus()) { 2365 ich_misr_el2.EOI = 1; 2366 } 2367 2368 // Underflow. [bit 1] 2369 // This maintenance interrupt is asserted when ICH_HCR_EL2.UIE==1 and 2370 // zero or one of the List register entries are marked as a valid 2371 // interrupt, that is, if the corresponding ICH_LR<n>_EL2.State bits 2372 // do not equal 0x0. 2373 uint32_t num_valid_interrupts = 0; 2374 uint32_t num_pending_interrupts = 0; 2375 2376 for (int lr_idx = 0; lr_idx < VIRTUAL_NUM_LIST_REGS; lr_idx++) { 2377 ICH_LR_EL2 ich_lr_el2 = 2378 isa->readMiscRegNoEffect(MISCREG_ICH_LR0_EL2 + lr_idx); 2379 2380 if (ich_lr_el2.State != ICH_LR_EL2_STATE_INVALID) { 2381 num_valid_interrupts++; 2382 } 2383 2384 if (ich_lr_el2.State == ICH_LR_EL2_STATE_PENDING) { 2385 num_pending_interrupts++; 2386 } 2387 } 2388 2389 if (ich_hcr_el2.UIE && (num_valid_interrupts < 2)) { 2390 ich_misr_el2.U = 1; 2391 } 2392 2393 // List Register Entry Not Present. [bit 2] 2394 // This maintenance interrupt is asserted when ICH_HCR_EL2.LRENPIE==1 2395 // and ICH_HCR_EL2.EOIcount is non-zero. 2396 if (ich_hcr_el2.LRENPIE && ich_hcr_el2.EOIcount) { 2397 ich_misr_el2.LRENP = 1; 2398 } 2399 2400 // No Pending. [bit 3] 2401 // This maintenance interrupt is asserted when ICH_HCR_EL2.NPIE==1 and 2402 // no List register is in pending state. 2403 if (ich_hcr_el2.NPIE && (num_pending_interrupts == 0)) { 2404 ich_misr_el2.NP = 1; 2405 } 2406 2407 // vPE Group 0 Enabled. [bit 4] 2408 // This maintenance interrupt is asserted when 2409 // ICH_HCR_EL2.VGrp0EIE==1 and ICH_VMCR_EL2.VENG0==1. 2410 if (ich_hcr_el2.VGrp0EIE && ich_vmcr_el2.VENG0) { 2411 ich_misr_el2.VGrp0E = 1; 2412 } 2413 2414 // vPE Group 0 Disabled. [bit 5] 2415 // This maintenance interrupt is asserted when 2416 // ICH_HCR_EL2.VGrp0DIE==1 and ICH_VMCR_EL2.VENG0==0. 2417 if (ich_hcr_el2.VGrp0DIE && !ich_vmcr_el2.VENG0) { 2418 ich_misr_el2.VGrp0D = 1; 2419 } 2420 2421 // vPE Group 1 Enabled. [bit 6] 2422 // This maintenance interrupt is asserted when 2423 // ICH_HCR_EL2.VGrp1EIE==1 and ICH_VMCR_EL2.VENG1==is 1. 2424 if (ich_hcr_el2.VGrp1EIE && ich_vmcr_el2.VENG1) { 2425 ich_misr_el2.VGrp1E = 1; 2426 } 2427 2428 // vPE Group 1 Disabled. [bit 7] 2429 // This maintenance interrupt is asserted when 2430 // ICH_HCR_EL2.VGrp1DIE==1 and ICH_VMCR_EL2.VENG1==is 0. 2431 if (ich_hcr_el2.VGrp1DIE && !ich_vmcr_el2.VENG1) { 2432 ich_misr_el2.VGrp1D = 1; 2433 } 2434 2435 return ich_misr_el2; 2436} 2437 2438void 2439Gicv3CPUInterface::serialize(CheckpointOut & cp) const 2440{ 2441 SERIALIZE_SCALAR(hppi.intid); 2442 SERIALIZE_SCALAR(hppi.prio); 2443 SERIALIZE_ENUM(hppi.group); 2444} 2445 2446void 2447Gicv3CPUInterface::unserialize(CheckpointIn & cp) 2448{ 2449 UNSERIALIZE_SCALAR(hppi.intid); 2450 UNSERIALIZE_SCALAR(hppi.prio); 2451 UNSERIALIZE_ENUM(hppi.group); 2452} 2453