13.7.21. Trace ID Register 4

The TRCIDR4 characteristics are:

Purpose

Returns how many resources the trace unit supports.

Usage constraints

There are no usage constraints.

Configurations

Available in all configurations.

Attributes

See the register summary in Table 13.3.

Figure 13.22 shows the TRCIDR4 bit assignments.

Figure 13.22. TRCIDR4 bit assignments

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Table 13.24 shows the TRCIDR4 bit assignments.

Table 13.24. TRCIDR4 bit assignments

BitsNameFunction
[31:28]NUMVMIDC

Indicates the number of VMID comparators available for tracing. This value is:

0x1

One VMID comparator is available.

[27:24]NUMCIDC

Indicates the number of CID comparators available for tracing. This value is:

0x1

One Context ID comparator is available.

[23:20]NUMSSCC

Indicates the number of single-shot comparator controls available for tracing. This value is:

0x1

One single-shot comparator control is available.

[19:16]NUMRSPAIR

Indicates the number of resource selection pairs available for tracing. This value is:

0x7

Eight resource selection pairs are available.

[15:12]NUMPC

Indicates the number of processor comparator inputs available for tracing. This value is:

0x0

No processor comparator inputs are available.

[11:9]-

Reserved, res0.

[8]SUPPDAC

Indicates whether the implementation supports data address comparisons: This value is:

0

Data address comparisons are not supported.

[7:4]NUMDVC

Indicates the number of data value comparators available for tracing. This value is:

0x0

No data value comparators are available.

[3:0]NUMACPPAIRS

Indicates the number of address comparator pairs available for tracing. This value is:

0x4

Four 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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