ARM Cortex-A15 MPCore Processor Technical Reference Manual

Program Trace Macrocell12.7.2 Configuration Code RegisterThe ETMCCR characteristics are:PurposeEnables software to read the implementation-defined configuration of thePTM, giving the number of each type of resource. Where a value indicatesthe number of instances of a particular resource, zero indicates that thereare no implemented resources of that resource type.Usage constraints There are no usage constraints.ConfigurationsAvailable in all PTM configurations.Attributes See the register summary in Table 12-4 on page 12-11.Figure 12-3 shows the ETMCCR bit assignments.31 30 28 27 26 25 24 23 22 20 19 17 16 15 13 12 4 3 011 ReservedID RegisterpresentReservedSoftware accesssupportedTrace start/stopblock presentNumber of countersSequencer presentNumber of external inputsNumber of external outputsFIFOFULL logic presentNumber ofaddresscomparatorpairsNumber of Context ID comparatorsFigure 12-3 ETMCCR bit assignmentsTable 12-6 shows the ETMCCR bit assignments.Table 12-6 ETMCCR bit assignmentsBits Name Function[31] ID Register present ID Register:1 ID Register is present. See ETM ID Register on page 12-20 formore information.[30:28] - RAZ.[27] Software access supported Software access support:1 The Cortex-A15 MPCore processor supports software access.[26] Trace start/stop block present Trace start/stop block:1 The trace start/stop block is present.[25:24] Number of Context ID comparators Number of Context ID comparators. For the Cortex-A15 MPCore processor, thisvalue is 1.[23] FIFOFULL logic present Indicates that it is not possible to stall the processor to prevent FIFO overflow.For the Cortex-A15 MPCore processor, this value is 0.[22:20] Number of external outputs Specifies the number of external outputs. For the Cortex-A15 MPCore processor,this value is 2.[19:17] Number of external inputs Specifies the number of external inputs. For the Cortex-A15 MPCore processor,this value is 4.ARM DDI 0438I Copyright © 2011-2013 ARM. All rights reserved. 12-16ID062913Non-Confidential