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User’s Manual
Preliminary PPC440x5 CPU Core
debug.fm.
September 12, 2002
Page 247 of 589
8.6.8 Debug Data Register (DBDR)
The DBDR can be used for communication between software running on the processor and debug tool hard-
ware and software. The DBDR can be written from a GPR using mtspr, and can be read into a GPR using
mfspr.
Figure 8-8. Debug Data Register (DBDR)
0:31 Debug Data
0 31
- PPC440x5 CPU Core 1
- User’s Manual 1
- Preliminary 1
- Copyright and Disclaimer 2
- Contents 3
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- PPC440x5 CPU Core Preliminary 10
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- Page 22 of 583 22
- About This Book 23
- Notation 24
- Related Publications 25
- Page 26 of 589 26
- 1. Overview 27
- – 64-bit time base 28
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- 1.3 PPC440x5 Organization 30
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- 1.4 Core Interfaces 35
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- 2. Programming Model 39
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- 2.2 Registers 47
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- 2.3 Instruction Classes 53
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- .]” syntax 59
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- .]” and “[o]” 63
- 2.5 Branch Processing 64
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- 2.6 Integer Processing 71
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- 2.7 Processor Control 74
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- 2.8 User and Supervisor Modes 80
- 2.9 Speculative Accesses 81
- 2.10 Synchronization 82
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- 3. Initialization 85
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- 3.2 Reset Types 89
- 3.3 Reset Sources 89
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- Preliminary PPC440x5 CPU Core 101
- Page 101 of 589 101
- TRANSIENT LINES 102
- LOCKED LINES 102
- NORMAL LINES 102
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- Programming Note: 105
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- 0 Cache line is not valid 113
- 1 Cache line is valid 113
- 0 TID enable 114
- 1 TID disable 114
- 4.3 Data Cache Controller 115
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- 5. Memory Management 133
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- 5.3 Page Identification 138
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- 5.4 Address Translation 140
- MSR[IS] for instruction fetch 141
- 5.5 Access Control 142
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- 5.6 Storage Attributes 145
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- 5.7 Storage Control Registers 147
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- 5.8 Shadow TLB Arrays 151
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- 5.11 TLB Parity Operations 155
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- 6. Interrupts and Exceptions 159
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- 6.3 Interrupt Processing 162
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- 6.5 Interrupt Definitions 175
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- Machine State Register (MSR) 198
- ME Unchanged 198
- All other MSR bits set to 0 198
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- 6.7 Exception Priorities 202
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- Page 208 of 589 208
- 7.1 Time Base 209
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- 7.2 Decrementer (DEC) 211
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- 7.4 Watchdog Timer 213
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- 8. Debug Facilities 219
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- 8.3 Debug Events 221
- IAC Event Enable Field 222
- IAC Mode Field 222
- IAC User/Supervisor Field 223
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- DAC Event Enable Field 226
- DAC Mode Field 227
- DAC User/Supervisor Field 228
- DVC Byte Enable Field 228
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- DVC Mode Field 232
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- 8.4 Debug Reset 238
- 8.5 Debug Timer Freeze 238
- 8.6 Debug Registers 238
- 01 Core reset 239
- 01 Reserved 240
- ≤ address < IAC2 241
- ≤ address < IAC4 241
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- 9. Instruction Set 249
- 9.2 Instruction Formats 250
- 9.3 Pseudocode 251
- Page 252 of 589 252
- 9.4 Register Usage 253
- PPC440x5 core 254
- Registers Altered 255
- Add Carrying 256
- Add Extended 257
- Add Immediate 258
- Programming Note 258
- Add Immediate Carrying 259
- Invalid Instruction Forms 262
- AND with Complement 265
- AND Immediate 266
- AND Immediate Shifted 267
- Branch Conditional 270
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- ← CIA + 4 272
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- Programming Notes 284
- Count Leading Zeros Word 286
- Data Cache Block Allocate 295
- Data Cache Block Flush 296
- Exceptions 296
- Data Cache Block Store 298
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- Data Cache Block Set to Zero 303
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- Architecture Note 304
- Data Cache Read 305
- Divide Word 307
- Divide Word Unsigned 308
- Equivalent 310
- Extend Sign Byte 311
- Extend Sign Halfword 312
- Instruction Cache Block Touch 315
- Page 315 of 589 315
- Instruction Cache Read 317
- Instruction Synchronize 320
- Load Byte and Zero 321
- Load Byte and Zero Indexed 324
- Load Halfword Algebraic 325
- Load Halfword and Zero 330
- Load Multiple Word 334
- Load Word and Reserve Indexed 339
- Load Word and Zero 341
- Load Word and Zero Indexed 344
- Move Condition Register Field 358
- Move From Condition Register 360
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- OR with Complement 393
- OR Immediate 394
- OR Immediate Shifted 395
- Return From Interrupt 397
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- Shift Left Word 405
- Shift Right Word 408
- Store Byte 409
- Store Byte with Update 410
- Store Byte Indexed 412
- Store Halfword 413
- Store Halfword with Update 415
- Store Halfword Indexed 417
- Store Multiple Word 418
- Store Word 422
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- Store Word with Update 426
- Store Word Indexed 428
- Subtract From 429
- Subtract From Carrying 430
- Subtract From Extended 431
- TLB Read Entry 435
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- TLB Synchronize 438
- Trap Word 441
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- Trap Word Immediate 444
- Page 444 of 589 444
- Extended mnemonic for 445
- Invalid Instruction Forms: 446
- XOR Immediate 449
- XOR Immediate Shifted 450
- 10. Register Summary 451
- ICDBDR, ICDBTRH, ICDBTRL 452
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- 10.2 Reserved Fields 457
- 10.3 Device Control Registers 457
- Page 458 of 589 458
- 0.Register Summary 459
- SPR 0x3B3 Supervisor R/W 460
- CCR0 (cont.) 461
- SPR 0x378 Supervisor R/W 462
- CCR1 (cont.) 463
- User Read/Write 464
- SPR 0x03A Supervisor R/W 465
- SPR 0x03B Supervisor R/W 466
- SPR 0x009 User R/W 467
- DAC1–DAC2 468
- SPR 0x134 Supervisor R/W 469
- DBCR0 (cont.) 470
- DBCR1 (cont.) 472
- Debug Control Register 2 473
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- DBCR2 (cont.) 474
- SPR 0x3F3 Supervisor R/W 475
- DBSR (cont.) 477
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- SPR 0x03D Supervisor R/W 480
- SPR 0x016 Supervisor R/W 481
- Decrementer Auto-Reload 482
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- DNV0–DNV3 483
- DTV0–DTV3 484
- DVC1–DVC2 485
- SPR 0x398 Supervisor R/W 486
- SPR 0x03E Supervisor R/W 487
- ESR (cont.) 488
- GPR0–GPR31 489
- IAC1–IAC4 490
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- INV0–INV3 494
- ITV0–ITV3 495
- SPR 0x399 Supervisor R/W 496
- IVOR0–IVOR15 497
- SPR 0x03F Supervisor R/W 498
- SPR 0x008 User R/W 499
- Machine Check Status Register 500
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- SPR 0x23A Supervisor R/W 501
- SPR 0x23B Supervisor R/W 502
- SPR 0x3B2 Supervisor R/W 503
- Supervisor R/W 504
- MSR (cont.) 505
- SPR 0x030 Supervisor R/W 506
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- Processor Version Register 508
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- SPR 39B Supervisor Read-Only 509
- SPRG0–SPRG7 510
- SPR 0x01A Supervisor R/W 511
- SPR 0x01B Supervisor R/W 512
- See Time Base on page 209 513
- Timer Control Register 515
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- Timer Status Register 516
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- SPR 0x100 (User R/W) 517
- Integer Exception Register 518
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- A.1 Instruction Formats 519
- A.1.1 Instruction Fields 520
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- A.1.2.5 X-Form 523
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- ←¬((RS) ⊕ (RB)) 538
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- ← (DCR(DCRN)) 543
- ← (MSR) 543
- ← (SPR(SPRN)) 544
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- September 12, 2002 571
- H, I, J, K 578
- Page 588 of 583 588
- Revision Log 589
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