ARM Cortex-A76 Core - Part a Functional Description

ARM Cortex-A76 Core

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Part A

Functional description

Table of Contents

Default Chapter5
- Table of Contents5
Preface15
- About this Book16
- Feedback21
Part a Functional Description23
Chapter A125
Introduction25
- A1.1 about the Core26
- A1.2 Features27
- A1.3 Implementation Options28
- Supported Standards and Specifications29
- A1.5 Test Features30
- A1.6 Design Tasks31
- A1.7 Product Revisions32
Chapter A233
Technical Overview33
- A2.1 Components34
- A2.2 Interfaces38
- A2.3 about System Control39
- A2.4 about the Generic Timer40
Chapter A341
Clocks, Resets, and Input Synchronization41
- A3.1 about Clocks, Resets, and Input Synchronization41
- About Clocks, Resets, and Input Synchronization42
- A3.2 Asynchronous Interface43
Chapter A445
Power Management45
- A4.1 about Power Management46
- A4.2 Voltage Domains47
- A4.3 Power Domains48
- A4.4 Architectural Clock Gating Modes50
- A4.5 Power Control52
- A4.6 Core Power Modes53
- A4.7 Encoding for Power Modes56
- A4.8 Power Domain States for Power Modes57
- A4.9 Power up and down Sequences58
- A4.10 Debug over Powerdown59
Chapter A561
Memory Management Unit61
- A5.1 about the MMU62
- A5.2 TLB Organization64
- A5.3 TLB Match Process65
- A5.4 Translation Table Walks66
- A5.5 MMU Memory Accesses67
- A5.6 Specific Behaviors on Aborts and Memory Attributes68
Chapter A671
Level 1 Memory System71
- A6.1 about the L1 Memory System72
- A6.2 Cache Behavior73
- A6.3 L1 Instruction Memory System75
- A6.4 L1 Data Memory System77
- A6.5 Data Prefetching79
- A6.6 Direct Access to Internal Memory80
Chapter A797
Level 2 Memory System97
- A7.1 about the L2 Memory System98
- A7.2 about the L2 Cache99
- A7.3 Support for Memory Types100
Reliability, Availability, and Serviceability (RAS)101
- A8.1 Cache ECC and Parity102
- Cache Protection Behavior103
- A8.3 Uncorrected Errors and Data Poisoning105
- A8.4 RAS Error Types106
- A8.5 Error Synchronization Barrier107
- A8.6 Error Recording108
- A8.7 Error Injection109
Chapter A9111
Generic Interrupt Controller CPU Interface111
- A9.1 about the Generic Interrupt Controller CPU Interface112
- A9.2 Bypassing the CPU Interface113
Chapter A10115
Advanced SIMD and Floating-Point Support115
- A10.1 about the Advanced SIMD and Floating-Point Support116
- A10.2 Accessing the Feature Identification Registers117
Part B121
Chapter B1121
Aarch32 System Registers121
- B1.1 Aarch32 Architectural System Register Summary122
Chapter B2123
Aarch64 System Registers123
- B2.1 Aarch64 Registers126
- Aarch64 Architectural System Register Summary127
- B2.3 Aarch64 Implementation Defined Register Summary134
- Aarch64 Registers by Functional Group136
- B2.5 ACTLR_EL1, Auxiliary Control Register, EL1144
- B2.6 ACTLR_EL2, Auxiliary Control Register, EL2145
- B2.7 ACTLR_EL3, Auxiliary Control Register, EL3147
- B2.8 AFSR0_EL1, Auxiliary Fault Status Register 0, EL1149
- B2.9 AFSR0_EL2, Auxiliary Fault Status Register 0, EL2150
- B2.10 AFSR0_EL3, Auxiliary Fault Status Register 0, EL3151
- B2.11 AFSR1_EL1, Auxiliary Fault Status Register 1, EL1152
- B2.12 AFSR1_EL2, Auxiliary Fault Status Register 1, EL2153
- B2.13 AFSR1_EL3, Auxiliary Fault Status Register 1, EL3154
- B2.14 AIDR_EL1, Auxiliary ID Register, EL1155
- B2.15 AMAIR_EL1, Auxiliary Memory Attribute Indirection Register, EL1156
- B2.16 AMAIR_EL2, Auxiliary Memory Attribute Indirection Register, EL2157
- B2.17 AMAIR_EL3, Auxiliary Memory Attribute Indirection Register, EL3158
- B2.18 CCSIDR_EL1, Cache Size ID Register, EL1159
- B2.19 CLIDR_EL1, Cache Level ID Register, EL1161
- B2.20 CPACR_EL1, Architectural Feature Access Control Register, EL1163
- B2.21 CPTR_EL2, Architectural Feature Trap Register, EL2164
- B2.22 CPTR_EL3, Architectural Feature Trap Register, EL3165
- B2.23 CPUACTLR_EL1, CPU Auxiliary Control Register, EL1166
- B2.24 CPUACTLR2_EL1, CPU Auxiliary Control Register 2, EL1168
- B2.25 CPUCFR_EL1, CPU Configuration Register, EL1170
- B2.26 CPUECTLR_EL1, CPU Extended Control Register, EL1172
- B2.27 CPUPCR_EL3, CPU Private Control Register, EL3180
- B2.28 CPUPMR_EL3, CPU Private Mask Register, EL3182
- B2.29 CPUPOR_EL3, CPU Private Operation Register, EL3184
- B2.30 CPUPSELR_EL3, CPU Private Selection Register, EL3186
- B2.31 CPUPWRCTLR_EL1, Power Control Register, EL1188
- B2.32 CSSELR_EL1, Cache Size Selection Register, EL1190
- B2.33 CTR_EL0, Cache Type Register, EL0191
- B2.34 DCZID_EL0, Data Cache Zero ID Register, EL0193
- B2.35 DISR_EL1, Deferred Interrupt Status Register, EL1194
- B2.36 ERRIDR_EL1, Error ID Register, EL1196
- B2.37 ERRSELR_EL1, Error Record Select Register, EL1197
- B2.38 ERXADDR_EL1, Selected Error Record Address Register, EL1198
- B2.39 ERXCTLR_EL1, Selected Error Record Control Register, EL1199
- B2.40 ERXFR_EL1, Selected Error Record Feature Register, EL1200
- B2.41 ERXMISC0_EL1, Selected Error Record Miscellaneous Register 0, EL1201
- B2.42 ERXMISC1_EL1, Selected Error Record Miscellaneous Register 1, EL1202
- ERXPFGCDNR_EL1, Selected Error Pseudo Fault Generation Count down Register, EL1203
  - B2.45 ERXPFGFR_EL1, Selected Pseudo Fault Generation Feature Register, EL1206
  - B2.46 ERXSTATUS_EL1, Selected Error Record Primary Status Register, EL1207
  - B2.47 ESR_EL1, Exception Syndrome Register, EL1208
  - B2.48 ESR_EL2, Exception Syndrome Register, EL2209
  - B2.49 ESR_EL3, Exception Syndrome Register, EL3210
  - B2.50 HACR_EL2, Hyp Auxiliary Configuration Register, EL2211
  - B2.51 HCR_EL2, Hypervisor Configuration Register, EL2212
  - B2.52 ID_AA64AFR0_EL1, Aarch64 Auxiliary Feature Register 0214
  - B2.53 ID_AA64AFR1_EL1, Aarch64 Auxiliary Feature Register 1215
  - B2.54 ID_AA64DFR0_EL1, Aarch64 Debug Feature Register 0, EL1216
  - B2.55 ID_AA64DFR1_EL1, Aarch64 Debug Feature Register 1, EL1218
  - B2.56 ID_AA64ISAR0_EL1, Aarch64 Instruction Set Attribute Register 0, EL1219
  - B2.57 ID_AA64ISAR1_EL1, Aarch64 Instruction Set Attribute Register 1, EL1221
  - B2.58 ID_AA64MMFR0_EL1, Aarch64 Memory Model Feature Register 0, EL1222
  - B2.59 ID_AA64MMFR1_EL1, Aarch64 Memory Model Feature Register 1, EL1224
  - B2.60 ID_AA64MMFR2_EL1, Aarch64 Memory Model Feature Register 2, EL1226
  - B2.61 ID_AA64PFR0_EL1, Aarch64 Processor Feature Register 0, EL1227
  - B2.62 ID_AA64PFR1_EL1, Aarch64 Processor Feature Register 1, EL1229
  - B2.63 ID_AFR0_EL1, Aarch32 Auxiliary Feature Register 0, EL1230
  - B2.64 ID_DFR0_EL1, Aarch32 Debug Feature Register 0, EL1231
  - B2.65 ID_ISAR0_EL1, Aarch32 Instruction Set Attribute Register 0, EL1233
  - B2.66 ID_ISAR1_EL1, Aarch32 Instruction Set Attribute Register 1, EL1235
  - B2.67 ID_ISAR2_EL1, Aarch32 Instruction Set Attribute Register 2, EL1237
  - B2.68 ID_ISAR3_EL1, Aarch32 Instruction Set Attribute Register 3, EL1239
  - B2.69 ID_ISAR4_EL1, Aarch32 Instruction Set Attribute Register 4, EL1241
  - B2.70 ID_ISAR5_EL1, Aarch32 Instruction Set Attribute Register 5, EL1243
  - B2.71 ID_ISAR6_EL1, Aarch32 Instruction Set Attribute Register 6, EL1245
  - B2.72 ID_MMFR0_EL1, Aarch32 Memory Model Feature Register 0, EL1246
  - B2.73 ID_MMFR1_EL1, Aarch32 Memory Model Feature Register 1, EL1248
  - B2.74 ID_MMFR2_EL1, Aarch32 Memory Model Feature Register 2, EL1250
  - B2.75 ID_MMFR3_EL1, Aarch32 Memory Model Feature Register 3, EL1252
  - B2.76 ID_MMFR4_EL1, Aarch32 Memory Model Feature Register 4, EL1254
  - B2.77 ID_PFR0_EL1, Aarch32 Processor Feature Register 0, EL1256
  - B2.78 ID_PFR1_EL1, Aarch32 Processor Feature Register 1, EL1258
  - B2.79 ID_PFR2_EL1, Aarch32 Processor Feature Register 2, EL1260
  - B2.80 LORC_EL1, Loregion Control Register, EL1261
  - B2.81 LORID_EL1, Loregion ID Register, EL1262
  - B2.82 LORN_EL1, Loregion Number Register, EL1263
  - B2.83 MDCR_EL3, Monitor Debug Configuration Register, EL3264
  - B2.84 MIDR_EL1, Main ID Register, EL1266
  - B2.85 MPIDR_EL1, Multiprocessor Affinity Register, EL1267
  - B2.86 PAR_EL1, Physical Address Register, EL1269
  - B2.87 REVIDR_EL1, Revision ID Register, EL1270
  - B2.88 RMR_EL3, Reset Management Register271
  - B2.89 RVBAR_EL3, Reset Vector Base Address Register, EL3272
  - B2.90 SCTLR_EL1, System Control Register, EL1273
  - B2.91 SCTLR_EL2, System Control Register, EL2275
  - B2.92 SCTLR_EL3, System Control Register, EL3276
  - B2.93 TCR_EL1, Translation Control Register, EL1278
  - B2.94 TCR_EL2, Translation Control Register, EL2279
  - B2.95 TCR_EL3, Translation Control Register, EL3280
  - B2.96 TTBR0_EL1, Translation Table Base Register 0, EL1281
  - B2.97 TTBR0_EL2, Translation Table Base Register 0, EL2282
  - B2.98 TTBR0_EL3, Translation Table Base Register 0, EL3283
  - B2.99 TTBR1_EL1, Translation Table Base Register 1, EL1284
  - B2.100 TTBR1_EL2, Translation Table Base Register 1, EL2285
  - B2.101 VDISR_EL2, Virtual Deferred Interrupt Status Register, EL2286
  - B2.102 VSESR_EL2, Virtual Serror Exception Syndrome Register287
  - B2.103 VTCR_EL2, Virtualization Translation Control Register, EL2288
  - B2.104 VTTBR_EL2, Virtualization Translation Table Base Register, EL2289
  - B3.1 Error System Register Summary292
  - B3.2 ERR0ADDR, Error Record Address Register293
  - B3.3 ERR0CTLR, Error Record Control Register294
  - B3.4 ERR0FR, Error Record Feature Register296
  - B3.5 ERR0MISC0, Error Record Miscellaneous Register 0298
  - B3.6 ERR0MISC1, Error Record Miscellaneous Register 1301
  - B3.7 ERR0PFGCDNR, Error Pseudo Fault Generation Count down Register302
  - B3.8 ERR0PFGCTLR, Error Pseudo Fault Generation Control Register303
  - B3.9 ERR0PFGFR, Error Pseudo Fault Generation Feature Register305
  - B3.10 ERR0STATUS, Error Record Primary Status Register307
  - B4.1 CPU Interface Registers313
  - B4.2 Aarch64 Physical GIC CPU Interface System Register Summary314
  - B4.5 ICC_BPR0_EL1, Interrupt Controller Binary Point Register 0, EL1317
  - B4.6 ICC_BPR1_EL1, Interrupt Controller Binary Point Register 1, EL1318
  - B4.7 ICC_CTLR_EL1, Interrupt Controller Control Register, EL1319
  - B4.8 ICC_CTLR_EL3, Interrupt Controller Control Register, EL3321
  - B4.9 ICC_SRE_EL1, Interrupt Controller System Register Enable Register, EL1323
  - B4.10 ICC_SRE_EL2, Interrupt Controller System Register Enable Register, EL2324
  - B4.11 ICC_SRE_EL3, Interrupt Controller System Register Enable Register, EL3326
  - B4.12 Aarch64 Virtual GIC CPU Interface Register Summary328
  - B4.15 ICV_BPR0_EL1, Interrupt Controller Virtual Binary Point Register 0, EL1331
  - B4.16 ICV_BPR1_EL1, Interrupt Controller Virtual Binary Point Register 1, EL1332
  - B4.17 ICV_CTLR_EL1, Interrupt Controller Virtual Control Register, EL1333
  - B4.18 Aarch64 Virtual Interface Control System Register Summary335
  - B4.21 ICH_HCR_EL2, Interrupt Controller Hyp Control Register, EL2338
  - B4.22 ICH_VMCR_EL2, Interrupt Controller Virtual Machine Control Register, EL2341
  - B4.23 ICH_VTR_EL2, Interrupt Controller VGIC Type Register, EL2343
  - B5.1 Aarch64 Register Summary346
  - B5.2 FPCR, Floating-Point Control Register347
  - B5.3 FPSR, Floating-Point Status Register349
  - B5.4 MVFR0_EL1, Media and VFP Feature Register 0, EL1351
  - B5.5 MVFR1_EL1, Media and VFP Feature Register 1, EL1353
  - B5.6 MVFR2_EL1, Media and VFP Feature Register 2, EL1355
  - B5.7 Aarch32 Register Summary357
  - B5.8 FPSCR, Floating-Point Status and Control Register358
  - C1.1 about Debug Methods365
  - C1.2 Debug Register Interfaces367
  - C1.3 Debug Events369
  - C2.1 about the PMU372
  - C2.2 PMU Functional Description373
  - C2.3 PMU Events374
  - C2.4 PMU Interrupts383
  - C2.5 Exporting PMU Events384
  - C3.1 about the AMU386
  - C3.2 Accessing the Activity Monitors387
  - C3.3 AMU Counters388
  - C3.4 AMU Events389
  - C4.1 about the ETM392
  - C4.2 ETM Trace Unit Generation Options and Resources393
  - C4.3 ETM Trace Unit Functional Description395
  - C4.4 Resetting the ETM396
  - C4.5 Programming and Reading ETM Trace Unit Registers397
  - C4.6 ETM Trace Unit Register Interfaces398
  - C4.7 Interaction with the PMU and Debug399
  - D1.1 Aarch32 Debug Register Summary403
  - D2.1 Aarch64 Debug Register Summary405
  - D2.2 Dbgbcrn_El1, Debug Breakpoint Control Registers, EL1407
  - D3.1 Memory-Mapped Debug Register Summary416
  - D3.2 EDCIDR0, External Debug Component Identification Register 0420
  - D3.3 EDCIDR1, External Debug Component Identification Register 1421
  - D3.4 EDCIDR2, External Debug Component Identification Register 2422
  - D3.5 EDCIDR3, External Debug Component Identification Register 3423
  - D3.6 EDDEVID, External Debug Device ID Register 0424
  - D3.7 EDDEVID1, External Debug Device ID Register 1425
  - D3.8 EDPIDR0, External Debug Peripheral Identification Register 0426
  - D3.9 EDPIDR1, External Debug Peripheral Identification Register 1427
  - D3.10 EDPIDR2, External Debug Peripheral Identification Register 2428
  - D3.11 EDPIDR3, External Debug Peripheral Identification Register 3429
  - D3.12 EDPIDR4, External Debug Peripheral Identification Register 4430
  - D3.13 Edpidrn, External Debug Peripheral Identification Registers 5-7431
  - D3.14 EDRCR, External Debug Reserve Control Register432
  - D4.1 Aarch32 PMU Register Summary434
  - D4.2 PMCEID0, Performance Monitors Common Event Identification Register 0436
  - D4.3 PMCEID1, Performance Monitors Common Event Identification Register 1439
  - D4.4 PMCR, Performance Monitors Control Register441
  - D5.1 Aarch64 PMU Register Summary445
  - D6.1 Memory-Mapped PMU Register Summary456
  - D6.2 PMCFGR, Performance Monitors Configuration Register460
  - D6.3 PMCIDR0, Performance Monitors Component Identification Register 0461
  - D6.4 PMCIDR1, Performance Monitors Component Identification Register 1462
  - D6.5 PMCIDR2, Performance Monitors Component Identification Register 2463
  - D6.6 PMCIDR3, Performance Monitors Component Identification Register 3464
  - D6.7 PMPIDR0, Performance Monitors Peripheral Identification Register 0465
  - D6.8 PMPIDR1, Performance Monitors Peripheral Identification Register 1466
  - D6.9 PMPIDR2, Performance Monitors Peripheral Identification Register 2467
  - D6.10 PMPIDR3, Performance Monitors Peripheral Identification Register 3468
  - D6.11 PMPIDR4, Performance Monitors Peripheral Identification Register 4469
  - D6.12 Pmpidrn, Performance Monitors Peripheral Identification Register 5-7470
  - D7.1 PMU Snapshot Register Summary472
  - D7.2 PMPCSSR, Snapshot Program Counter Sample Register473
  - D7.3 PMCIDSSR, Snapshot CONTEXTIDR_EL1 Sample Register474
  - D7.4 PMCID2SSR, Snapshot CONTEXTIDR_EL2 Sample Register475
  - D7.5 PMSSSR, PMU Snapshot Status Register476
  - D7.6 PMOVSSR, PMU Overflow Status Snapshot Register477
  - D7.7 PMCCNTSR, PMU Cycle Counter Snapshot Register478
  - D7.8 Pmevcntsrn, PMU Cycle Counter Snapshot Registers 0-5479
  - D7.9 PMSSCR, PMU Snapshot Capture Register480
  - D8.1 Aarch64 AMU Register Summary482
  - D8.2 AMCNTENCLR0_EL0, Activity Monitors Count Enable Clear Register, EL0483
  - D8.3 AMCNTENSET_EL0, Activity Monitors Count Enable Set Register, EL0484
  - D8.4 AMCFGR_EL0, Activity Monitors Configuration Register, EL0485
  - D8.5 AMUSERENR_EL0, Activity Monitor EL0 Enable Access, EL0487
  - D8.6 Amevcntrn_El0, Activity Monitor Event Counter Register, EL0489
  - D8.7 Amevtypern_El0, Activity Monitor Event Type Register, EL0490
  - D9.1 ETM Register Summary495
  - D9.2 Trcacatrn, Address Comparator Access Type Registers 0-7499
  - D9.3 Trcacvrn, Address Comparator Value Registers 0-7501
  - D9.4 TRCAUTHSTATUS, Authentication Status Register502
  - D9.5 TRCAUXCTLR, Auxiliary Control Register503
  - D9.6 TRCBBCTLR, Branch Broadcast Control Register505
  - D9.7 TRCCCCTLR, Cycle Count Control Register506
  - D9.8 TRCCIDCCTLR0, Context ID Comparator Control Register 0507
  - D9.9 TRCCIDCVR0, Context ID Comparator Value Register 0508
  - D9.10 TRCCIDR0, ETM Component Identification Register 0509
  - D9.11 TRCCIDR1, ETM Component Identification Register 1510
  - D9.12 TRCCIDR2, ETM Component Identification Register 2511
  - D9.13 TRCCIDR3, ETM Component Identification Register 3512
  - D9.14 TRCCLAIMCLR, Claim Tag Clear Register513
  - D9.15 TRCCLAIMSET, Claim Tag Set Register514
  - D9.16 TRCCNTCTLR0, Counter Control Register 0515
  - D9.17 TRCCNTCTLR1, Counter Control Register 1517
  - D9.18 Trccntrldvrn, Counter Reload Value Registers 0-1519
  - D9.19 Trccntvrn, Counter Value Registers 0-1520
  - D9.20 TRCCONFIGR, Trace Configuration Register521
  - D9.21 TRCDEVAFF0, Device Affinity Register 0524
  - D9.22 TRCDEVAFF1, Device Affinity Register 1526
  - D9.23 TRCDEVARCH, Device Architecture Register527
  - D9.24 TRCDEVID, Device ID Register528
  - D9.25 TRCDEVTYPE, Device Type Register529
  - D9.26 TRCEVENTCTL0R, Event Control 0 Register530
  - D9.27 TRCEVENTCTL1R, Event Control 1 Register532
  - D9.28 TRCEXTINSELR, External Input Select Register533
  - D9.29 TRCIDR0, ID Register 0534
  - D9.30 TRCIDR1, ID Register 1536
  - D9.31 TRCIDR2, ID Register 2537
  - D9.32 TRCIDR3, ID Register 3539
  - D9.33 TRCIDR4, ID Register 4541
  - D9.34 TRCIDR5, ID Register 5543
  - D9.35 TRCIDR8, ID Register 8545
  - D9.36 TRCIDR9, ID Register 9546
  - D9.37 TRCIDR10, ID Register 10547
  - D9.38 TRCIDR11, ID Register 11548
  - D9.39 TRCIDR12, ID Register 12549
  - D9.40 TRCIDR13, ID Register 13550
  - D9.41 TRCIMSPEC0, Implementation Specific Register 0551
  - D9.42 TRCITATBIDR, Integration ATB Identification Register552
  - D9.43 TRCITCTRL, Integration Mode Control Register553
  - D9.44 TRCITIATBINR, Integration Instruction ATB in Register554
  - D9.45 TRCITIATBOUTR, Integration Instruction ATB out Register555
  - D9.46 TRCITIDATAR, Integration Instruction ATB Data Register556
  - D9.47 TRCLAR, Software Lock Access Register557
  - D9.48 TRCLSR, Software Lock Status Register558
  - D9.49 Trccntvrn, Counter Value Registers 0-1559
  - D9.50 TRCOSLAR, os Lock Access Register560
  - D9.51 TRCOSLSR, os Lock Status Register561
  - D9.52 TRCPDCR, Power down Control Register562
  - D9.53 TRCPDSR, Power down Status Register563
  - D9.54 TRCPIDR0, ETM Peripheral Identification Register 0564
  - D9.55 TRCPIDR1, ETM Peripheral Identification Register 1565
  - D9.56 TRCPIDR2, ETM Peripheral Identification Register 2566
  - D9.57 TRCPIDR3, ETM Peripheral Identification Register 3567
  - D9.58 TRCPIDR4, ETM Peripheral Identification Register 4568
  - D9.59 Trcpidrn, ETM Peripheral Identification Registers 5-7569
  - D9.60 TRCPRGCTLR, Programming Control Register570
  - D9.61 Trcrsctlrn, Resource Selection Control Registers 2-16571
  - D9.62 Trcseqevrn, Sequencer State Transition Control Registers 0-2572
  - D9.63 TRCSEQRSTEVR, Sequencer Reset Control Register574
  - D9.64 TRCSEQSTR, Sequencer State Register575
  - D9.65 TRCSSCCR0, Single-Shot Comparator Control Register 0576
  - D9.66 TRCSSCSR0, Single-Shot Comparator Status Register 0577
  - D9.67 TRCSTALLCTLR, Stall Control Register578
  - D9.68 TRCSTATR, Status Register579
  - D9.69 TRCSYNCPR, Synchronization Period Register580
  - D9.70 TRCTRACEIDR, Trace ID Register581
  - D9.71 TRCTSCTLR, Global Timestamp Control Register582
  - D9.72 TRCVICTLR, Viewinst Main Control Register583
  - D9.73 TRCVIIECTLR, Viewinst Include-Exclude Control Register585
  - D9.74 TRCVISSCTLR, Viewinst Start-Stop Control Register586
  - D9.75 TRCVMIDCVR0, VMID Comparator Value Register 0587
  - D9.76 TRCVMIDCCTLR0, Virtual Context Identifier Comparator Control Register 0588

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