Cortex-A8 R2P2.pdf - ARM Information Center

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System Control CoprocessorTable 3-30 shows the results of attempted access for each mode.Table 3-30 Results of access to Instruction Set Attributes Register 1 aSecure privileged Nonsecure privileged Secure User Nonsecure UserRead Write Read Write Read Write Read WriteData Undefined Data Undefined Undefined Undefined Undefined Undefineda. An entry of Undefined in the table means that the access gives an Undefined Instruction exception when the coprocessorinstruction is executed.To access the Instruction Set Attributes Register 1, read CP15 with:MRC p15, 0, , c0, c2, 1 ; Read Instruction Set Attributes Register 13.2.17 c0, Instruction Set Attributes Register 2The purpose of the Instruction Set Attributes Register 2 is to provide information aboutthe instruction set that the processor supports beyond the basic set.The Instruction Set Attributes Register 2 is:• a read-only register common to the Secure and Nonsecure states• accessible in privileged modes only.Figure 3-13 shows the bit arrangement for the Instruction Set Attributes Register 2.31 28 27 24 23 20 19 16 15 12 11 8 7 4 3 0Unsigned SignedMemory Load andReversal PSRMultiply Interruptiblemultiply multiplyhint storeinstructions instructionsinstructions instructionsinstructions instructionsinstructions instructionsFigure 3-13 Instruction Set Attributes Register 2 format3-46 Copyright © 2006-2008 ARM Limited. All rights reserved. ARM DDI 0344E
System Control CoprocessorTable 3-31 shows how the bit values correspond with the Instruction Set AttributesRegister 2 functions.Table 3-31 Instruction Set Attributes Register 2 bit functionsBits Field Function[31:28] Reversalinstructions[27:24] PSRinstructions[23:20] Unsignedmultiplyinstructions[19:16] Signedmultiplyinstructions[15:12] Multiplyinstructions[11:8] Interruptibleinstructions[7:4] Memoryhintinstructions[3:0] Load andstoreinstructionsIndicates support for reversal instructions.0x2 = Processor supports:• REV• REV16• REVSH• RBIT.Indicates support for PSR instructions:0x1 = Processor supports MRS and MSR exception return instructions for data processing.Indicates support for advanced unsigned multiply instructions.0x2 = Processor supports:• UMULL and UMLAL• UMAAL.Indicates support for advanced signed multiply instructions.0x3 = Processor supports:• SMULL and SMLAL• SMLABB, SMLABT, SMLALBB,SMLALBT, SMLALTB, SMLALTT, SMLATB, SMLATT, SMLAWB, SMLAWT,SMULBB, SMULBT, SMULTB, SMULTT, SMULWB, SMULWT, and Q flag in PSRs• SMLAD, SMLADX, SMLALD, SMLALDX, SMLSD, SMLSDX, SMLSLD, SMLSLDX, SMMLA, SMMLAR, SMMLS,SMMLSR, SMMUL, SMMULR, SMUAD, SMUADX, SMUSD, and SMUSDX.Indicates support for multiply instructions:0x2 = Processor supports MUL, MLA, and MLS.Indicates support for multi-access interruptible instructions:0x0 = Processor does not support restartable LDM and STM.Indicates support for memory hint instructions:0x3 = Processor supports PLD, memory hint YIELD (true NOP), and PLI (NOP).Indicates support for load and store instructions:0x1 = Processor supports LDRD and STRD.ARM DDI 0344E Copyright © 2006-2008 ARM Limited. All rights reserved. 3-47
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Cortex -A8Revision: r2p2Technical R
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Product StatusThe information in th
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ContentsCortex-A8 Technical Referen
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Contents7.8 Parity detection ......
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ContentsA.2 ATB interface .........
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List of TablesCortex-A8 Technical R
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List of TablesTable 3-103 Results o
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List of TablesTable 12-1 Access to
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List of TablesTable 15-3 CTI regist
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List of Tablesxx Copyright © 2006-
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List of FiguresFigure 3-10 Memory M
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List of FiguresFigure 10-13 Retenti
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List of FiguresFigure 15-16 CTI Cha
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PrefaceAbout this manualThis is the
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PrefaceChapter 16 Instruction Cycle
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PrefacePrefix CPrefix HPrefix nPref
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PrefaceFeedbackARM welcomes feedbac
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Introduction1.1 About the processor
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Introduction1.3 Components of the p
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Introduction1.3.4 Load/storeThe loa
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Introduction1.4 External interfaces
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Introduction1.6 Power managementThe
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Introduction1.8 Product revisionsTh
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Introduction1-14 Copyright © 2006-
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Programmer’s Model• Hardware co
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Programmer’s Model2.2 Thumb-2 ins
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Programmer’s Model2.3 ThumbEE ins
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Programmer’s ModelThumbEE Handler
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Programmer’s Model2.4 Jazelle Ext
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Programmer’s Model— the registe
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Programmer’s ModelNonsecureSecure
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Programmer’s Model2.7 VFPv3 archi
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Programmer’s Model2.9 Data typesT
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Programmer’s ModelBitHigher addre
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Programmer’s Model2.12 Operating
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Programmer’s ModelIn privileged m
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Programmer’s Model16 generalpurpo
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Programmer’s ModelIn ARM state, y
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Programmer’s Model2.14.5 The GE[3
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Programmer’s ModelT bitThe T bit
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Programmer’s ModelOnly secure pri
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Programmer’s Model2.15.2 Leaving
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Programmer’s ModelAn internal or
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Programmer’s ModelImprecise data
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Programmer’s ModelNoteIf the Embe
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Page 98 and 99: System Control Coprocessor3.1 About
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Page 102 and 103: System Control CoprocessorSecurity
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System Control CoprocessorVA to PA
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System Control CoprocessorTable 3-8
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System Control CoprocessorInvalidat
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System Control CoprocessorThe PMNC
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System Control CoprocessorCWhen wri
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System Control Coprocessor3.2.47 c9
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System Control CoprocessorMRC p15,
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System Control Coprocessorb. The EN
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System Control CoprocessorCWhen rea
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System Control Coprocessor• acces
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System Control CoprocessorBits Fiel
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System Control CoprocessorYou can c
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System Control CoprocessorIf the op
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System Control Coprocessor31 20 19
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System Control CoprocessorTo access
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System Control Coprocessora. An ent
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System Control CoprocessorTo access
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System Control CoprocessorThe PLE I
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System Control CoprocessorMRC p15,
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System Control Coprocessor31 25 24
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System Control CoprocessorFigure 3-
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System Control CoprocessorTo perfor
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System Control CoprocessorLDR R1, =
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System Control CoprocessorLDR R1, =
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System Control CoprocessorL1 Data 0
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System Control CoprocessorInstructi
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System Control CoprocessorParity/EC
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System Control CoprocessorL2 parity
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System Control CoprocessorThe L2 da
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Chapter 4Unaligned Data and Mixed-e
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Unaligned Data and Mixed-endian Dat
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Unaligned Data and Mixed-endian Dat
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Chapter 5Program Flow PredictionThi
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Program Flow Prediction5.2 Predicte
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Program Flow Prediction5.2.1 Return
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Program Flow Prediction5.4 Guidelin
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Program Flow Prediction5.6 Operatin
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Chapter 6Memory Management UnitThis
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Memory Management Unit6.2 Memory ac
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Memory Management Unit6.4 MMU inter
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Memory Management Unit6.6 TLB lockd
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Chapter 7Level 1 Memory SystemThis
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Level 1 Memory System7.2 Cache orga
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Level 1 Memory System7.3 Memory att
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Level 1 Memory SystemTable 7-1 Memo
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Level 1 Memory System7.5 Data cache
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Level 1 Memory SystemAn exception t
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Level 1 Memory System7.8 Parity det
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Chapter 8Level 2 Memory SystemThis
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Level 2 Memory System8.2 Cache orga
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Level 2 Memory System8.3 Enabling a
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Level 2 Memory SystemControl Regist
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Level 2 Memory System8.4.4 Memory r
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Level 2 Memory System8.5 Synchroniz
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Level 2 Memory System8.6 Locked acc
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Chapter 9External Memory InterfaceT
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External Memory Interfaceto the wri
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External Memory InterfaceTable 9-2
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External Memory Interface9.3 AXI in
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External Memory InterfaceBWBCNoTTSS
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Chapter 10Clock, Reset, and Power C
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Clock, Reset, and Power Controlfami
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Clock, Reset, and Power Control10.2
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Clock, Reset, and Power Control•
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Clock, Reset, and Power Control2. F
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Clock, Reset, and Power ControlNote
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Clock, Reset, and Power ControlAfte
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Clock, Reset, and Power Control•
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Clock, Reset, and Power Control—
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Clock, Reset, and Power ControlThe
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Clock, Reset, and Power ControlPowe
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Clock, Reset, and Power ControlTo p
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Clock, Reset, and Power ControlPowe
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Clock, Reset, and Power ControlATBI
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Clock, Reset, and Power Control7. P
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Chapter 11Design for TestThis chapt
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Design for Test11.1.2 MBIST registe
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Design for Testdseed[3:0]Write the
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Design for TestNoteOnly arrays with
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Design for Test• read and write l
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Design for TestTable 11-10 Selectin
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Design for TestTable 11-15 shows ho
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Design for TestArrayFail[22:0] fail
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Design for TestWhen testing the tag
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Design for Test• Bitmap test mode
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Design for TestCLKARESETnMBISTMODEM
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Design for TestCLKARESETnMBISTMODEM
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Design for TestTable 11-19 shows th
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Design for TestNoteNormal MBIST tes
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Design for TestRowmaxmax - 11 1 1 1
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Design for Test2. R, W_, R_, incr.3
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Design for TestRow3210Addressingdir
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Design for TestRow32100 00 00 00 00
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Design for Test11.2 ATPG test featu
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Design for TestWBR in place of the
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Design for TestOne methodology for
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Chapter 12DebugThis chapter describ
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Debug12.1.3 Debug targetThe debug t
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DebugWhen execution of a monitor ta
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Debug12.3 Debug register interfaceY
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DebugTable 12-3 Debug memory-mapped
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Debug12.3.6 Power domains and debug
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DebugLocks permissionYou can lock t
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DebugTable 12-6 shows the behavior
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Debug12.4 Debug register descriptio
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DebugTable 12-11 shows how the bit
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DebugThe Debug Self Address Offset
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DebugBits Field FunctionTable 12-14
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DebugBits Field Function[9] - Reser
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DebugThe DTR access mode can be one
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DebugBitsFieldFunctionTable 12-16 s
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DebugTable 12-17 Vector Catch Regis
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Debug31 3 2 1 0ReservedNot write-th
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DebugTable 12-23 Breakpoint Control
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Debug12.4.16 Watchpoint Control Reg
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DebugTable 12-26 Watchpoint Control
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DebugNoteOn system reset, PRSR[1] r
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DebugTable 12-32 Management registe
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DebugFigure 12-19 shows the bit arr
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Debug12.5.5 Integration Mode Contro
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Debug12.5.8 Lock Access RegisterThe
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Debug31 8 7 6 5 4 3 2 1 0ReservedSe
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DebugTable 12-44 Peripheral Identif
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DebugTable 12-50 shows how the bit
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Debug12.6.2 Halting debug event•
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Debug12.6.5 Watchpoint debug events
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DebugNoteThe Data Abort handler che
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DebugIf the debugged code is not ru
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DebugTable 12-54 shows the read PC
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Debug12.8.4 Writing to the CPSR in
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DebugCoprocessor instructionsThe ru
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DebugSVCSMCUndefinedThe processor i
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Debug12.9 Cache debugThere are seve
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Debug12.10 External debug interface
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DebugDBGROMADDRThe DBGROMADDR signa
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Debug4. Issue an Instruction Synchr
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Debug12.11.1 Debug communications c
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DebugDebugger access to the DCCA de
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DebugTable 12-58 Values to write to
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Debug}when 1:byte_address_select :=
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DebugNoteIn Example 12-10 on page 1
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Debug12.11.5 Debug state exitWhen e
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DebugExample 12-15 Reading the PCRe
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DebugExample 12-19 Checking for an
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DebugExample 12-22 shows the sequen
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Debug}dscr := ReadDebugRegister(34)
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Debug}scr := (scr | 1);WriteCPReg(1
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DebugIf on a power-down request fro
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Debug; Step 2. Loop writing words f
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Chapter 13NEON and VFP Programmer
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NEON and VFP Programmer’s Modelre
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NEON and VFP Programmer’s ModelS0
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NEON and VFP Programmer’s ModelBa
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NEON and VFP Programmer’s ModelFC
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NEON and VFP Programmer’s ModelTa
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NEON and VFP Programmer’s Model31
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NEON and VFP Programmer’s ModelCo
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Chapter 14Embedded Trace MacrocellT
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Embedded Trace Macrocell14.1.2 The
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Embedded Trace Macrocell(DAP) throu
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Embedded Trace MacrocellTable 14-1
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Embedded Trace MacrocellRegister na
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Embedded Trace MacrocellSee the ETM
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Embedded Trace Macrocell14.5 Precis
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Embedded Trace MacrocellThe followi
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Embedded Trace Macrocellcomparator
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Embedded Trace Macrocell14.8 Instru
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Embedded Trace MacrocellWhen a WFI
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Embedded Trace MacrocellYou can use
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Chapter 15Cross Trigger InterfaceTh
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Cross Trigger Interface• An input
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Cross Trigger Interface15.1.2 The c
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Cross Trigger InterfaceTable 15-2 T
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Cross Trigger Interface15.4 About t
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Cross Trigger InterfaceTable 15-3 C
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Cross Trigger Interface15.6 CTI reg
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Cross Trigger InterfaceNoteThe CTII
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Cross Trigger InterfaceBits Field F
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Cross Trigger Interface15.6.9 CTI T
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Cross Trigger InterfaceTable 15-14
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Cross Trigger Interface15.7.4 ITTRI
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Cross Trigger Interface15.8.3 Devic
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Cross Trigger InterfaceActual Compo
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Chapter 16Instruction Cycle TimingT
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Instruction Cycle Timing16.2 Instru
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Instruction Cycle Timingis availabl
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Instruction Cycle TimingTable 16-4
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Instruction Cycle Timing16.2.7 Stat
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Instruction Cycle TimingThe number
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Instruction Cycle Timing16.3 Dual-i
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Instruction Cycle TimingReplayevent
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Instruction Cycle TimingPredicting
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Instruction Cycle TimingUsing MCR i
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Instruction Cycle TimingExample 16-
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Instruction Cycle Timing16.6.3 Adva
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Instruction Cycle Timing16.6.5 Adva
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Instruction Cycle TimingFor example
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Instruction Cycle Timing16.7 VFP in
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Instruction Cycle Timing16.7.2 VFP
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Chapter 17AC CharacteristicsThis ch
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AC CharacteristicsThe timing parame
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AC CharacteristicsTable 17-2 Timing
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AC Characteristics17.4 APB interfac
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AC Characteristics17.5 L1 and L2 MB
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AC Characteristics17.7 DFT interfac
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AC Characteristicsb. Figure 10-6 on
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Appendix ASignal DescriptionsThis a
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Signal DescriptionsA.2 ATB interfac
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Signal DescriptionsTable A-3 MBIST
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Signal DescriptionsA.4 Preload engi
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Signal DescriptionsTable A-6 APB in
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Signal DescriptionsTable A-7 Miscel
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Signal DescriptionsA.8 Miscellaneou
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Appendix BInstruction MnemonicsThis
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Instruction MnemonicsTable B-1 Adva
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Instruction MnemonicsB.2 VFP data-p
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GlossaryThis glossary describes som
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GlossaryApplication Specific Integr
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GlossaryRead ID capabilityThe maxim
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GlossaryByte-invariantIn a byte-inv
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GlossaryCAM includes comparison log
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GlossaryDouble-precision valueConsi
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Glossary• arithmetic operation re
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GlossaryInvalidateJazelle architect
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GlossaryPAPenaltyPower-on resetPref
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GlossarySetSet-associative cacheSee
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GlossaryTrapTrigger instructionAn e
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GlossaryWrite-back (WB)Write buffer
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