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Intel
®
IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
September 2006 DM
Order Number: 252480-006US 331
AHB/APB Bridge—Intel
®
IXP42X product line and IXC1100 control plane processors
- IXP42X Product Line of 1
- Control Plane Processor 1
- DM September 2006 2
- 2 Order Number: 252480-006US 2
- Contents 3
- Revision History 23
- 1.0 Introduction 26
- 2.0 Overview of Product Line 30
- Figure 1. Intel 31
- Figure 2. Intel 32
- Figure 3. Intel 33
- Figure 4. Intel 34
- North AHB 35
- 2.1.1.1 ARM 36
- Compatibility 36
- 2.1.1.3 Memory Management 37
- 2.1.1.4 Instruction Cache 37
- 2.1.1.5 Branch Target Buffer 37
- 2.1.1.6 Data Cache 37
- 2.1.1.7 Intel XScale 38
- 2.3 Internal Bus 39
- 2.4 MII Interfaces 39
- 2.5 AHB Queue Manager 39
- 2.6 UTOPIA 2 40
- 2.7 USB v1.1 40
- 2.9 Memory Controller 40
- 2.10 Expansion Bus 41
- 2.13 GPIO 42
- 2.14 Interrupt Controller 42
- 2.15 Timers 42
- 2.16 JTAG 43
- 3.0 Intel XScale 44
- Processor 44
- 3.1.1 Memory Attributes 45
- 3.1.3 MMU Control 48
- 3.1.3.2 Enabling/Disabling 48
- 3.1.3.3 Locking Entries 49
- 3.2 Instruction Cache 52
- Example: 32K byte cache 53
- 3.3 Branch Target Buffer 58
- History 59
- Bits[1:0] 59
- 3.4 Data Cache 60
- Example: 32-Kbyte cache 61
- Example: 2K byte cache 62
- 3.4.2 Cacheability 63
- Example 11. Creating Data RAM 70
- 3.5 Configuration 73
- 3.5.1 CP15 Registers 75
- 3.5.1.5 Register 4: Reserved 80
- 3.5.2 CP14 Registers 86
- 3.6 Software Debug 88
- 3.6.1 Definitions 89
- 3.6.2 Debug Registers 89
- 3.6.3 Debug Modes 89
- 3.6.3.1 Halt Mode 90
- 3.6.3.2 Monitor Mode 90
- 3.6.4.2 Halt Mode Bit (H) 91
- 3.6.4.4 Sticky Abort Bit (SA) 92
- 3.6.5.1 Halt Mode 93
- 3.6.5.2 Monitor Mode 94
- 3.6.6 HW Breakpoint Resources 95
- 3.6.6.2 Data Breakpoints 96
- (TXRXCTRL) 98
- ’ system 99
- 3.6.8.2 Overflow Flag (OV) 100
- 3.6.8.3 Download Flag (D) 100
- 3.6.9 Transmit Register 101
- 3.6.10 Receive Register 102
- 3.6.11 Debug JTAG Access 102
- 3.6.11.1 SELDCSR JTAG Command 102
- 3.6.12 Trace Buffer 109
- 3.6.13 Trace Buffer Entries 111
- 3.6.13.1 Message Byte 111
- 3.6.14.1 LDIC JTAG Command 116
- 3.6.14.3 LDIC Cache Functions 118
- Debugger Actions 123
- Debug Handler Actions 123
- 3.7 Performance Monitoring 133
- (PMN0 - PMN3) 134
- (EVTSEL) 137
- 3.7.6 Examples 142
- 3.8 Programming Model 144
- 3.8.2.2 26-Bit Architecture 145
- 3.8.2.3 Thumb 145
- 3.8.2.4 ARM 145
- DSP-Enhanced Instruction Set 145
- 3.8.2.5 Base Register Update 145
- 3.8.3 Extensions to ARM 146
- Architecture 146
- 3.8.3.2 New Page Attributes 152
- 3.8.3.4 Event Architecture 154
- 3.9.1 Interrupt Latency 159
- 3.9.2 Branch Prediction 160
- 3.9.3 Addressing Modes 160
- 3.9.4 Instruction Latencies 160
- 3.9.4.1 Performance Terms 160
- UMLALr6,r8,r0,r1 161
- ADD r9,r10,r11 161
- SUB r2,r8,r9 161
- MOV r0,r1 161
- 3.10 Optimization Guide 167
- 3.10.1.1 About This Section 168
- 3.10.2 Processors’ Pipeline 168
- F1 F2 ID RF X1 X2 169
- M1 M2 Mx 169
- 3.10.2.4 Memory Pipeline 172
- 3.10.3 Basic Optimizations 173
- 3.10.4.1 Instruction Cache 180
- 3.10.4.2 Data and Mini Cache 181
- 3.10.4.3 Cache Considerations 184
- 3.10.5 Instruction Scheduling 191
- 3.10.5.1 Scheduling Loads 191
- 3.10.6 Optimizing C Libraries 199
- 3.10.7 Optimizations for Size 199
- 5.0 Internal Bus 204
- 5.2 Memory Map 205
- Table 96. Memory Map 206
- 6.0 PCI Controller 208
- South AHB 210
- Figure 33 216
- Register 220
- Translation 222
- Register Name Description 225
- 6.6.1 PCI Byte Enables 226
- 0x00000010 227
- 0x00000110 DATA 228
- 0x00028F91 DAT 229
- 0xB 0x0 229
- 0x00000014 230
- 0x00000015 232
- 0x00000014 DATA 0 234
- 6.13 PCI RCOMP Circuitry 249
- 6.14 Register Descriptions 249
- (PCI_DIDVID) 250
- (PCI_SRCR) 250
- PCI_SRCR (Sheet 1 of 2) 251
- (PCI_BAR0) 253
- PCI_BHLC 253
- PCI_BAR0 253
- (PCI_CRP_WDATA) 261
- PCI_CRP_AD_CBE 261
- PCI_CRP_WDATA 261
- (PCI_ISR) 263
- PCI_ISR (Sheet 1 of 2) 263
- PCI_CSR (Sheet 2 of 2) 263
- (PCI_INTEN) 264
- PCI_INTEN 264
- PCI_ISR (Sheet 2 of 2) 264
- (PCI_DMACTRL) 265
- PCI_DMACTRL (Sheet 1 of 2) 265
- (PCI_PTADMA0_AHBADDR) 271
- (PCI_PTADMA0_PCIADDR) 271
- PCI_PTADMA0_AHBADDR 271
- 7.0 SDRAM Controller 276
- B4963-01 277
- B4964-01 278
- 7.1 SDRAM Memory Space 279
- 7.2.1 Initializing the SDRAM 283
- 7.3 SDRAM Memory Accesses 285
- 7.3.2 Write Transfer 286
- 7.3.2.1 Write Transfer 286
- 7.4 Register Description 287
- 7.4.2 Refresh Register 288
- 7.4.3 Instruction Register 288
- SDR_CONFIG 288
- SDR_REFRESH 288
- SDRAM controller: 289
- Table 116. SDRAM Commands 290
- 8.0 Expansion Bus Controller 292
- (9+CNFG[3:0]) 295
- 8.6 Using I/O Wait 301
- Valid Data 302
- Valid Address 302
- 8.8.1 Intel 305
- 8.8.2 Intel 306
- Multiplexed-Mode Read Access 306
- 8.8.3 Intel 307
- Simplex-Mode Write Access 307
- 8.8.4 Intel 308
- Simplex-Mode Read Access 308
- T1 T2 T3 T4 T5 311
- Motorola* Simplex 311
- Write Mode 311
- Motorola* Simplex 312
- Read Mode 312
- 8.8.9 TI* HPI-8 Write Access 313
- 8.8.10 TI* HPI-8 Read Access 314
- 8.9 Register Descriptions 319
- BYTE_SWAP_EN 325
- 9.0 AHB/APB Bridge 328
- Figure 77. APB Interface 329
- Peripheral 330
- TXD or RXD 333
- Bit Definition 333
- Figure 79. UART Block Diagram 334
- 10.2 Configuring the UART 335
- 10.2.4 UART Interrupts 339
- 10.4 Register Descriptions 344
- Modem Control Register 346
- 10.4.7 FIFO Control Register 349
- 10.4.8 Line Control Register 350
- 10.4.9 Modem Control Register 352
- 10.4.10 Line Status Register 353
- LSR (Sheet 1 of 2) 353
- 10.4.11 Modem Status Register 354
- LSR (Sheet 2 of 2) 354
- 10.4.12 Scratch-Pad Register 355
- ISR (Sheet 1 of 2) 356
- 10.5 Console UART 357
- Interrupt Mask: 365
- ISR (Sheet 2 of 2) 370
- 11.1 Initializing the IBPMU 372
- 11.2 Using the IBPMU 373
- 11.2.2 Monitored SDRAM Events 377
- 11.2.3 Cycle Count 377
- 11.3 Register Descriptions 378
- PSMR (Sheet 1 of 2) 384
- PSMR (Sheet 2 of 2) 385
- -MHz clock cycles before an 388
- 12.4 Register Description 391
- (GPIT2R) 394
- GPIT2R (Sheet 1 of 2) 394
- 12.4.7 GPIO Clock Register 395
- (GPCLKR) 395
- GPIT2R (Sheet 2 of 2) 395
- GPCLKR (Sheet 1 of 2) 395
- GPCLKR (Sheet 2 of 2) 396
- 13.0 Interrupt Controller 398
- 13.4 Reading Interrupt Status 400
- INTR_ST (Sheet 1 of 2) 402
- INTR_ST (Sheet 2 of 2) 403
- 13.5.4 IRQ Status Register 404
- 13.5.5 FIQ Status Register 404
- INTR_PRTY 405
- INTR_IRQ_ENC_ST 406
- INTR_FIQ_ENC_ST 406
- 14.0 Timers 408
- 14.2 Time-Stamp Timer 409
- 14.3 General-Purpose Timers 409
- 14.4.1 Time-Stamp Timer 411
- OST_TIM0 411
- OST_TIM0_RL 412
- OST_TIM1 412
- 14.4.6 Watch-Dog Timer 413
- OST_TIM1_RL 413
- OST_WDOG 413
- 14.4.8 Watch-Dog Key Register 414
- OST_WDOG_ENAB 414
- OST_WDOG_KEY 414
- 14.4.9 Timer Status 415
- OST_STATUS 415
- 15.0 Ethernet MAC A 416
- 15.1 Ethernet Coprocessor 417
- 15.2 Register Descriptions 427
- 15.2.1 Transmit Control 1 428
- 15.2.2 Transmit Control 2 429
- 15.2.3 Receive Control 1 429
- 15.2.4 Receive Control 2 430
- 15.2.5 Random Seed 430
- 15.2.13 Slot Time 433
- 15.2.15 MDIO Command 1 434
- 15.2.16 MDIO Command 2 434
- 15.2.17 MDIO Command 3 435
- 15.2.18 MDIO Command 4 435
- 15.2.19 MDIO Status Registers 435
- MDIO Command 435
- 15.2.20 MDIO Status 1 436
- 15.2.21 MDIO Status 2 436
- 15.2.22 MDIO Status 3 436
- 15.2.23 MDIO Status 4 436
- 15.2.25 Address Mask 1 437
- 15.2.26 Address Mask 2 438
- 15.2.27 Address Mask 3 438
- 15.2.28 Address Mask 4 438
- 15.2.29 Address Mask 5 438
- 15.2.30 Address Mask 6 439
- 15.2.31 Address Registers 439
- 15.2.32 Address 1 440
- 15.2.33 Address 2 440
- 15.2.34 Address 3 440
- 15.2.35 Address 4 440
- 15.2.36 Address 5 441
- 15.2.37 Address 6 441
- 15.2.40 Unicast Address 1 443
- 15.2.41 Unicast Address 2 443
- 15.2.42 Unicast Address 3 443
- 15.2.43 Unicast Address 4 443
- 15.2.44 Unicast Address 5 444
- 15.2.45 Unicast Address 6 444
- 15.2.46 Core Control 444
- 16.0 Ethernet MAC B 446
- Correct interval 454
- Data from here is processed 454
- 17.5.1 HSS Clock and Jitter 455
- Characterization 456
- PeriodPeriodPj −= 457
- 17.6.2 E1 459
- 17.6.3 MVIP 460
- Timeslots 463
- MHz clock 463
- Frame pulse 463
- B4252-02 464
- Unused Bytes 465
- 18.1 USB Overview 468
- 18.2 Device Configuration 469
- 18.3 USB Operation 470
- 18.3.2 Bit Encoding 471
- 18.3.3 Field Formats 472
- The presence of SOF 474
- 18.3.5 Transaction Formats 475
- 18.3.6 UDC Device Requests 477
- 18.3.7 UDC Configuration 478
- 18.4 UDC Hardware Connections 479
- 18.5 Register Descriptions 479
- 18.5.1.1 UDC Enable 481
- 18.5.1.2 UDC Active 481
- 18.5.1.3 UDC Resume (RSM) 481
- 0 x 00000000 485
- 18.5.3.3 Flush Tx FIFO (FTF) 486
- 18.5.3.5 Sent STALL (SST) 486
- 18.5.3.6 Force STALL (FST) 486
- 18.5.3.7 Bit 6 Reserved 487
- 18.5.7.3 Flush Tx FIFO (FTF) 494
- 18.5.7.5 Sent STALL (SST) 494
- 18.5.7.6 Force STALL (FST) 494
- 18.5.7.7 Bit 6 Reserved 494
- (UDCCS6) 495
- 18.5.8.7 Bit 6 Reserved 497
- UDCCS7 (Sheet 1 of 2) 499
- 18.5.10.6 Bit 5 Reserved 501
- 18.5.10.7 Bit 6 Reserved 501
- 18.5.12.3 Flush Tx FIFO (FTF) 504
- 18.5.12.5 Sent STALL (SST) 504
- 18.5.12.6 Force STALL (FST) 504
- 18.5.12.7 Bit 6 Reserved 504
- 18.5.13.7 Bit 6 Reserved 507
- UDCCS11 (Sheet 1 of 2) 507
- 18.5.14.6 Force Stall (FST) 509
- 18.5.15.3 Flush Tx FIFO (FTF) 510
- UDCCS14 (Sheet 1 of 2) 513
- 18.5.17.3 Flush Tx FIFO (FTF) 514
- UDCCS14 (Sheet 2 of 2) 514
- 18.5.17.5 Sent STALL (SST) 515
- 18.5.17.6 Force STALL (FST) 515
- 18.5.17.7 Bit 6 Reserved 515
- Access: Read/Write 518
- 18.5.41 UDC Data Register 11 535
- (UDDR11) 535
- processor writes 537
- 19.0 UTOPIA Level-2 538
- 19.1 UTOPIA Transmit Module 540
- 19.2 UTOPIA Receive Module 543
- (a.k.a. – RX_CLAV) 545
- (a.k.a. – RX_ENB_N) 545
- 19.4 MPHY Polling Routines 546
- 19.5 UTOPIA Level-2 Clocks 546
- 20.0 JTAG Interface 548
- 20.1.1 Test-Logic-Reset State 549
- 20.1.2 Run-Test/Idle State 550
- 20.1.3 Select-DR-Scan State 550
- 20.1.4 Capture-DR State 550
- 20.1.5 Shift-DR State 550
- 20.1.6 Exit1-DR State 551
- 20.1.7 Pause-DR State 551
- 20.1.8 Exit2-DR State 551
- 20.1.9 Update-DR State 551
- 20.1.10 Select-IR-Scan State 552
- 20.1.11 Capture-IR State 552
- 20.1.12 Shift-IR State 552
- 20.1.13 Exit1-IR State 552
- 20.1.14 Pause-IR State 552
- 20.2 JTAG Instructions 553
- 20.3 Data Registers 554
- 20.3.1 Boundary Scan Register 555
- 20.3.2 Instruction Register 555
- 21.0 AHB Queue Manager (AQM) 556
- 21.3 Functional Description 557
- 21.4 AHB Interface 558
- 21.4.1 Queue Control 559
- 21.4.2 Queue Status 560
- 21.4.2.1 Status Update 560
- 21.4.2.2 Flag Bus 561
- 21.5 Register Descriptions 562
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