13.7.21 Trace ID Register 4

The TRCIDR4 characteristics are:
PurposeReturns how many resources the trace unit supports.
Usage constraintsThere are no usage constraints.
ConfigurationsAvailable in all configurations.
AttributesSee 13.6 Register summary.
The following figure shows the TRCIDR4 bit assignments.
Figure 13-22 TRCIDR4 bit assignments
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The following table shows the TRCIDR4 bit assignments.

Table 13-24 TRCIDR4 bit assignments

Bits Name Function
[31:28] NUMVMIDC
Indicates the number of VMID comparators available for tracing. This value is:
0x1One VMID comparator is available.
[27:24] NUMCIDC
Indicates the number of CID comparators available for tracing. This value is:
0x1One Context ID comparator is available.
[23:20] NUMSSCC
Indicates the number of single-shot comparator controls available for tracing. This value is:
0x1One single-shot comparator control is available.
[19:16] NUMRSPAIR
Indicates the number of resource selection pairs available for tracing. This value is:
0x7Eight resource selection pairs are available.
[15:12] NUMPC
Indicates the number of processor comparator inputs available for tracing. This value is:
0x0No processor comparator inputs are available.
[11:9] - Reserved, RES0.
[8] SUPPDAC
Indicates whether the implementation supports data address comparisons: This value is:
0Data address comparisons are not supported.
[7:4] NUMDVC
Indicates the number of data value comparators available for tracing. This value is:
0x0No data value comparators are available.
[3:0] NUMRSPAIRS
Indicates the number of address comparator pairs available for tracing. This value is:
0x4Four address comparator pairs are available.
The TRCIDR4 can be accessed through the internal memory-mapped interface and the external debug interface, offset 0x1F0.
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