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Contents 7-8 Translation Table Base Register ...............................................................................................7-7 7-9 Domain Access Control Register...............................................................................................7-8 7-10Fault Status Register .................................................................................................................7-8 7-11Fault Address Register ..............................................................................................................7-9 7-12Cache Functions........................................................................................................................7-9 7-13TLB Functions..........................................................................................................................7-11 7-14Cache Lockdown Functions.....................................................................................................7-11 7-15Data Cache Lock Register.......................................................................................................7-11 7-16TLB Lockdown Functions ........................................................................................................7-12 7-17Accessing Process ID..............................................................................................................7-12 7-18Process ID Register.................................................................................................................7-13 7-19Accessing the Debug Registers...............................................................................................7-13 7-20Coprocessor Access Register .................................................................................................7-14 7-21CP14 Registers........................................................................................................................7-16 7-22Accessing the Performance Monitoring Registers...................................................................7-16 7-23PWRMODE Register 7 ............................................................................................................7-17 7-24CCLKCFG Register 6 ..............................................................................................................7-17 7-25Clock and Power Management valid operations .....................................................................7-17 7-26Accessing the Debug Registers...............................................................................................7-18 8-1 Clock Count Register (CCNT) ...................................................................................................8-2 8-2 Performance Monitor Count Register (PMN0 and PMN1).........................................................8-2 8-3 Performance Monitor Control Register (CP14, register 0).........................................................8-3 8-4 Performance Monitoring Events ................................................................................................8-4 8-5 Some Common Uses of the PMU..............................................................................................8-5 9-1 TAP Controller Pin Definitions ...................................................................................................9-2 9-2 JTAG Instruction Codes.............................................................................................................9-4 9-3 JTAG Instruction Descriptions ...................................................................................................9-4 10-1Coprocessor 15 Debug Registers............................................................................................10-2 10-2Coprocessor 14 Debug Registers............................................................................................10-2 10-3Debug Control and Status Register (DCSR) ...........................................................................10-3 10-4Event Priority ...........................................................................................................................10-6 10-5Instruction Breakpoint Address and Control Register (IBCRx) ................................................10-9 10-6Data Breakpoint Register (DBRx)............................................................................................10-9 10-7Data Breakpoint Controls Register (DBCON)........................................................................10-10 10-8TX RX Control Register (TXRXCTRL)...................................................................................10-12 10-9Normal RX Handshaking .......................................................................................................10-12 10-10High-Speed Download Handshaking States ........................................................................10-13 10-11TX Handshaking...................................................................................................................10-14 10-12TXRXCTRL Mnemonic Extensions ......................................................................................10-14 10-13TX Register ..........................................................................................................................10-15 10-14RX Register..........................................................................................................................10-15 10-15DEBUG Data Register Reset Values ...................................................................................10-23 10-16CP 14 Trace Buffer Register Summary................................................................................10-24 10-17Checkpoint Register (CHKPTx) ...........................................................................................10-24 10-18TBREG Format ....................................................................................................................10-25 10-19Message Byte Formats ........................................................................................................10-28 10-20LDIC Cache Functions .........................................................................................................10-32 11-1Branch Latency Penalty...........................................................................................................11-1 11-2Latency Example .....................................................................................................................11-3 11-3Branch Instruction Timings (Those predicted by the BTB) ......................................................11-3 Intel® XScale™ Microarchitecture User’s Manual xi