Cortex-A8 Technical Reference Manual - ARM Information Center

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List of Figures Figure 12-4 Debug Self Address Offset Register format ............................................................................ 12-15 Figure 12-5 Debug Status and Control Register format ............................................................................. 12-16 Figure 12-6 DTR Register format ............................................................................................................... 12-21 Figure 12-7 Vector Catch Register format .................................................................................................. 12-22 Figure 12-8 Event Catch Register format ................................................................................................... 12-24 Figure 12-9 Debug State Cache Control Register format .......................................................................... 12-25 Figure 12-10 ITR format ............................................................................................................................... 12-25 Figure 12-11 Debug Run Control Register format ........................................................................................ 12-26 Figure 12-12 Breakpoint Control Registers format ....................................................................................... 12-27 Figure 12-13 Watchpoint Control Registers format ...................................................................................... 12-31 Figure 12-14 OS Lock Access Register format ............................................................................................ 12-33 Figure 12-15 OS Lock Status Register format ............................................................................................. 12-34 Figure 12-16 OS Save and Restore Register format ................................................................................... 12-34 Figure 12-17 PRCR format ........................................................................................................................... 12-36 Figure 12-18 PRSR format ........................................................................................................................... 12-37 Figure 12-19 Integration Internal Output Control Register format ................................................................ 12-40 Figure 12-20 Integration External Output Control Register format ............................................................... 12-41 Figure 12-21 Integration Input Status Register format ................................................................................. 12-42 Figure 12-22 Integration Mode Control Register format ............................................................................... 12-43 Figure 12-23 Claim Tag Set Register format ................................................................................................ 12-44 Figure 12-24 Claim Tag Clear Register format ............................................................................................ 12-44 Figure 12-25 Lock Access Register format .................................................................................................. 12-45 Figure 12-26 Lock Status Register format .................................................................................................... 12-45 Figure 12-27 Authentication Status Register format .................................................................................... 12-46 Figure 12-28 Device Type Register format .................................................................................................. 12-47 Figure 12-29 Timing of core power-down and power-up sequences ........................................................... 12-66 Figure 13-1 NEON and VFP register bank ................................................................................................... 13-3 Figure 13-2 Register banks .......................................................................................................................... 13-6 Figure 13-3 Floating-Point System ID Register format ............................................................................... 13-11 Figure 13-4 Floating-Point Status and Control Register format ................................................................. 13-12 Figure 13-5 Floating-Point Exception Register format ............................................................................... 13-14 Figure 13-6 MVFR0 Register format .......................................................................................................... 13-14 Figure 13-7 MVFR1 Register format .......................................................................................................... 13-15 Figure 14-1 Example CoreSight debug environment ................................................................................... 14-4 Figure 14-2 ID Register format ..................................................................................................................... 14-7 Figure 14-3 Configuration Code Register format ......................................................................................... 14-8 Figure 14-4 Configuration Code Extension Register format ......................................................................... 14-9 Figure 14-5 Mapping between the Component ID Registers and the component ID value ....................... 14-11 Figure 14-6 ITMISCOUT Register format ................................................................................................... 14-12 Figure 14-7 ITMISCIN Register format ....................................................................................................... 14-13 Figure 14-8 ITTRIGGER Register format ................................................................................................... 14-13 Figure 14-9 ITATBDATA0 Register format ................................................................................................. 14-14 Figure 14-10 ITATBCTR2 Register format ................................................................................................... 14-14 Figure 14-11 ITATBCTR1 Register format ................................................................................................... 14-15 Figure 14-12 ITATBCTR0 Register format ................................................................................................... 14-15 Figure 15-1 Debug system components ...................................................................................................... 15-2 Figure 15-2 Cross Trigger Interface channels .............................................................................................. 15-3 Figure 15-3 Asynchronous to synchronous converter .................................................................................. 15-7 Figure 15-4 CTI Control Register format .................................................................................................... 15-11 Figure 15-5 CTI Interrupt Acknowledge Register format ............................................................................ 15-11 Figure 15-6 CTI Application Trigger Set Register format ........................................................................... 15-12 Figure 15-7 CTI Application Trigger Clear Register format ........................................................................ 15-13 Figure 15-8 CTI Application Pulse Register format .................................................................................... 15-13 Figure 15-9 CTI Trigger to Channel Enable Registers format .................................................................... 15-14 Figure 15-10 CTI Channel to Trigger Enable Registers format .................................................................... 15-14 Figure 15-11 CTI Trigger In Status Register format ..................................................................................... 15-15 Figure 15-12 CTI Trigger Out Status Register format .................................................................................. 15-15 Figure 15-13 CTI Channel In Status Register format ................................................................................... 15-16 Figure 15-14 CTI Channel Gate Register format ......................................................................................... 15-17 Figure 15-15 ASIC Control Register format ................................................................................................. 15-17 ARM DDI 0344K Copyright © 2006-2010 ARM Limited. All rights reserved. xviii ID060510 Non-Confidential
List of Figures Figure 15-16 CTI Channel Out Status Register format ................................................................................ 15-18 Figure 15-17 ITTRIGINACK Register format ................................................................................................ 15-19 Figure 15-18 ITCHOUT Register format ...................................................................................................... 15-20 Figure 15-19 ITTRIGOUT Register format ................................................................................................... 15-20 Figure 15-20 ITTRIGOUTACK Register format ............................................................................................ 15-21 Figure 15-21 ITCHIN Register format .......................................................................................................... 15-22 Figure 15-22 ITTRIGIN Register format ....................................................................................................... 15-22 Figure 15-23 Mapping between the Component ID Registers and the component ID value ....................... 15-26 Figure 17-1 Input timing parameters ............................................................................................................ 17-2 Figure 17-2 Output timing parameters ......................................................................................................... 17-2 ARM DDI 0344K Copyright © 2006-2010 ARM Limited. All rights reserved. xix ID060510 Non-Confidential
Page 1 and 2: Copyright © 2006-2010 ARM Limited.
Page 3 and 4: Web Address http://www.arm.com ARM
Page 5 and 6: Contents 2.14 The program status re
Page 7 and 8: Contents 16.6 Instruction-specific
Page 9 and 10: List of Tables Table 3-16 Debug Fea
Page 11 and 12: List of Tables Table 3-136 Secure o
Page 13 and 14: List of Tables Table 12-59 Values t
Page 15 and 16: List of Figures Cortex-A8 Technical
Page 17: List of Figures Figure 3-77 BTB arr
Page 21 and 22: About this manual Product revision
Page 23 and 24: old Highlights interface elements,
Page 25 and 26: Feedback Feedback on the product Fe
Page 27 and 28: 1.1 About the processor Introductio
Page 29 and 30: 1.3 Components of the processor L1
Page 31 and 32: 1.3.6 NEON 1.3.7 ETM The NEON unit
Page 33 and 34: 1.5 Debug Introduction The processo
Page 35 and 36: 1.7 Configurable options Table 1-1
Page 37 and 38: Introduction • The various data a
Page 39 and 40: 1.9.6 r2p0-r2p1 1.9.7 r2p1-r2p2 1.9
Page 41 and 42: Chapter 2 Programmers Model This ch
Page 43 and 44: 2.2 Thumb-2 instruction set Program
Page 45 and 46: Bits Field Function Programmers Mod
Page 47 and 48: 2.4 Jazelle Extension 2.4.1 Jazelle
Page 49 and 50: 2.5 Security Extensions architectur
Page 51 and 52: 2.6 Advanced SIMD architecture Prog
Page 53 and 54: 2.8 Processor operating states 2.8.
Page 55 and 56: 2.10 Memory formats 2.10.1 Byte-inv
Page 57 and 58: 2.12 Operating modes Programmers Mo
Page 59 and 60: System and User r0 r1 r2 r3 r4 r5 r
Page 61 and 62: 2.14 The program status registers 2
Page 63 and 64: 2.14.5 The GE[3:0] bits Programmers
Page 65 and 66: Mode bits Programmers Model M[4:0]
Page 67 and 68: 2.15 Exceptions 2.15.1 Exception en
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2.15.5 Interrupt request 2.15.6 Abo
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This restores both the PC and the C
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2.15.13 Exception priorities Progra
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2.17 Hardware consideration for Sec
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SECMONOUT[78] instruction caches at
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Chapter 3 System Control Coprocesso
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System Control Coprocessor Register
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3.1.3 MMU control and configuration
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3.2 System control coprocessor regi
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CRn Op1 CRm Op2 Register or operati
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3.2.2 c0, Main ID Register System C
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3.2.4 c0, TCM Type Register 3.2.5 c
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3.2.7 c0, Processor Feature Registe
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• accessible in privileged modes
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System Control Coprocessor Table 3-
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Bits Field Function [11:8] L1 Harva
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Bits Field Function [11:8] Harvard
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31 28 27 24 23 20 19 16 15 12 11 8
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Table 3-30 shows the results of att
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System Control Coprocessor 31 28 27
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Table 3-36 shows the results of att
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• accessible in privileged modes
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CSSR Size 3.2.24 c0, Cache Size Sel
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System Control Coprocessor 31 30 29
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MCR p15, 0, , c1, c0, 0 ; Write Con
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Bits Field [19] Clock stop request
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Bits Field Security State NS S Tabl
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3.2.28 c1, Secure Configuration Reg
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AW EA Function Table 3-55 shows the
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3.2.32 c2, Translation Table Base R
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System Control Coprocessor Figure 3
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Bits Field Function 3.2.35 c5, Data
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3.2.36 c5, Instruction Fault Status
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3.2.38 c6, Data Fault Address Regis
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System Control Coprocessor Note •
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System Control Coprocessor Figure 3
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3.2.41 c8, TLB operations The data
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Figure 3-38 shows the bit arrangeme
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EN b 3.2.44 c9, Count Enable Clear
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EN b 3.2.46 c9, Software Increment
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EN b 3.2.48 c9, Cycle Count Registe
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EN b Table 3-96 shows the results o
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Value Description 0x44 Any cacheabl
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DBGEN || NIDEN 3.2.51 c9, User Enab
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EN 3.2.53 c9, Interrupt Enable Clea
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Figure 3-48 shows the bit arrangeme
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3.2.55 c9, L2 Cache Auxiliary Contr
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Bits Field Function [8:6] Tag RAM l
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TL bit value 3.2.57 c10, TLB preloa
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The PLE Identification and Status R
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3.2.62 c11, PLE enable commands U b
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Bits Field Function System Control
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U bit PLE bit Table 3-129 shows the
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U bit PLE bit System Control Coproc
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3.2.68 c12, Secure or Nonsecure Vec
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3.2.70 c12, Interrupt Status Regist
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The FCSE PID Register is: • a rea
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TLB CAM read/write TLB ATTR read/wr
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MCR p15 0, , c15, c3, 4 ; I-L1 TLB
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31 27 26 22 21 0 Reserved L1 Data 0
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System Control Coprocessor The L1 H
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3.2.78 c15, L1 data array operation
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Instruction L1 Data 0 register Inst
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Parity/ECC RAM read/write Data RAM
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3.2.82 c15, L2 parity/ECC array ope
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3.2.84 c15, L2 data array operation
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4.1 About unaligned and mixed-endia
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Unaligned Data and Mixed-endian Dat
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Chapter 5 Program Flow Prediction T
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5.2 Predicted instructions Program
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Program Flow Prediction Because ret
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5.4 Guidelines for optimal performa
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5.6 Operating system and predictor
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6.1 About the MMU Memory Management
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6.3 16MB supersection support Memor
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6.5 External aborts 6.5.1 External
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6.7 MMU software-accessible registe
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7.1 About the L1 memory system Leve
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7.2.6 Instruction cache maintenance
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L1 inner policy a L2 outer policy N
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7.5 Data cache features 7.5.1 Data
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7.7 Hardware support for virtual al
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Chapter 8 Level 2 Memory System Thi
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8.2 Cache organization 8.2.1 L2 cac
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8.3 Enabling and disabling the L2 c
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Level 2 Memory System Note It is en
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Level 2 Memory System Note You must
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Lock address : LockAddr Lock free :
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8.7 Parity and error correction cod
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9.1 About the external memory inter
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Integer data and CP14 writes Noncac
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9.4 AXI data read/write transaction
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Noncacheable, or strongly ordered,
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Noncacheable store word Noncacheabl
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LA Last Access External Memory Inte
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10.1 Clock domains 10.1.1 AXI clock
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10.2 Reset domains 10.2.1 Power-on
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REFCLK (PLL input) nPORESET ARESETn
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10.3 Power control 10.3.1 Dynamic p
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Clock, Reset, and Power Control the
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ATB APB I/O clamp I/O clamp L/S = L
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ATB APB I/O clamp I/O clamp LS = Le
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Clock, Reset, and Power Control 3.
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Powering up the debug and ETM domai
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7. Perform a normal software reset
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Clock, Reset, and Power Control 5.
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Chapter 11 Design for Test This cha
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In L1 MBIST Instruction Register Fi
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Note Do not test the CAMBIST arrays
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• number of rows of the L2 data,
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Design for Test Not all row setting
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In Design for Test Figure 11-4 show
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Design for Test When testing the ta
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CLK ARESETn MBISTMODE MBISTSHIFT MB
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End-of-test datalog retrieval Desig
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Pattern N RWRXMARCH 8N Row-fast Sta
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4. rscan array, data_seed = invert.
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3. R_, W, R, decr. 4. rscan data fr
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• the data after pass 1 of XADDRB
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(1 + (2 17)) 2 17 = 4,587,520 cycle
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processor input ports WEXTEST WINTE
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Design for Test toggling during shi
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12.1 Debug systems 12.1.1 Debug hos
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12.2.3 Security extensions and debu
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Instruction Mnemonic Description 12
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12.3.6 Power domains and debug 12.3
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Table 12-5 shows the APB interface
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12.4 Debug register descriptions Te
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MRC p14, 0, , c0, c0, 0 ; Read Debu
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31 30 29 28 27 26 25 24 23 22 21 20
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Bits Field Function [21:20] DTR acc
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Bits Field Function To access the D
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12.4.7 Watchpoint Fault Address Reg
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Bits Access Normal address [2] RW V
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12.4.12 Debug Run Control Register
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Table 12-23 shows how the bit value
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BVR[22:20] Meaning b011 The corresp
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Bits Field Function [15:14] Secure
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12.4.18 Operating System Lock Statu
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Debug • The sequence can be aband
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12.5 Management registers Offset Th
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Offset Register number Mnemonic Fun
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Bits Field Function [5] nDMAIRQ nDM
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12.5.7 Claim Tag Clear Register 12.
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12.5.10 Authentication Status Regis
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Table 12-45 shows fields that are i
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12.6 Debug events 12.6.1 Software d
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12.6.5 Watchpoint debug events If a
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Table 12-53 shows the values in the
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12.8 Debug state 12.8.1 Entering de
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12.8.4 Writing to the CPSR in debug
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Mode SCR[0] For CP15 instructions,
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12.8.9 Leaving debug state Imprecis
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12.9.3 Cache usage profiling Debug
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Note DBGPWRDWNREQ must be tied LOW
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If software running on the processo
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Rules for accessing the DCC At the
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} While the processor is running, i
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Debug Table 12-59 Values to write t
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12.11.4 Debug state entry Example 1
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} // Step 1. Update the CPSR value
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Writing the CPSR in debug state Exa
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Debug Example 12-21 Reading a word
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} // Step 9. Check for aborts. abor
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12.12 Debugging systems with energy
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MOV r0, r4 POP {r4, pc} Example 12-
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Chapter 13 NEON and VFP Programmers
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13.2 General-purpose registers 13.2
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13.3 Short vectors 13.3.1 About reg
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13.3.2 Operations using register ba
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NEON and VFP Programmers Model The
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Note All hardware ID information is
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Bits Field Function [12:8] - Reserv
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NEON and VFP Programmers Model Tabl
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13.6 Compliance with the IEEE 754 s
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Underflow NEON and VFP Programmers
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14.1 About the ETM 14.1.1 ETM featu
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14.1.3 NEON Bridge and bus matrix A
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14.3 ETM register summary The ETM r
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Bits Field Function [11:8] Major ET
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14.4.4 Peripheral Identification Re
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See the ETM Architecture Specificat
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Embedded Trace Macrocell Table 14-1
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14.5.3 Enabling events 14.5.4 Addre
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14.7 Context ID tracing Embedded Tr
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14.9 Idle state control Embedded Tr
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Page 465 and 466:
Chapter 15 Cross Trigger Interface
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CTICHIN[0] CTICHIN[1] CTICHIN[2] CT
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15.2 Trigger inputs and outputs Tri
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15.3 Connecting asynchronous channe
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15.5 CTI register summary Address o
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15.6 CTI register descriptions This
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15.6.4 CTI Application Trigger Clea
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Table 15-10 shows how the bit value
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15.6.12 ASIC Control Register, ASIC
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15.7 CTI Integration Test Registers
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15.7.4 ITTRIGOUTACK, 0xEF0 15.7.5 I
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Cross Trigger Interface Table 15-26
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15.8.3 Device Type Identifier, 0xFC
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Cross Trigger Interface Table 15-31
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16.1 About instruction cycle timing
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Instruction Cycle Timing Example 16
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Table 16-4 shows the operation of m
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Table 16-9 shows the operation of l
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d. See Load/store instructions on p
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Instruction Cycle Timing Table 16-1
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16.4 Other pipeline-dependent laten
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16.4.5 Conditional instructions Ins
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16.6 Instruction-specific schedulin
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Instruction Cycle Timing VNEG Dd,Dm
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VMLA a VMLS a VMLAa VMLSa VQDMLAa V
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VSLI VSRI 16.6.5 Advanced SIMD floa
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16.6.6 Advanced SIMD byte permute i
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Instruction Table 16-23 shows the o
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Instruction VST3 3-reg (unaligned)
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Instruction VLD3 3-reg (unaligned)
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Instruction Single precision cycles
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• FMACS, FNMACS • FMSCS, FNMSCS
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is dual issued with previous instru
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17.1 About setup and hold times AC
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17.2 AXI interface Table 17-2 shows
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17.3 ATB and CTI interfaces Table 1
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AC Characteristics Table 17-4 Timin
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17.6 L2 preload interface AC Charac
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17.8 Miscellaneous signals AC Chara
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A.1 AXI interface Signal Descriptio
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A.3 MBIST and DFT interface A.3.1 M
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A.4 Preload engine interface Table
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A.6 Miscellaneous signals Table A-7
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Signal I/O Reset Description CFGNMF
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Signal I/O Reset Description DBGNOP
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Appendix B Instruction Mnemonics Th
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Instruction Mnemonics Table B-1 Adv
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Appendix C Revisions This appendix
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Revisions Added text to clarify des
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Glossary This glossary describes so
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Glossary Automatic Test Pattern Gen
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Big-endian memory Memory in which:
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Conditional execution Glossary incl
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Glossary Embedded Trace Macrocell (
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Illegal instruction An instruction
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Glossary NaN Not a number. A symbol
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Glossary Significand The component
Page 579 and 580:
Glossary Watchpoint A watchpoint is
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