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TRCTRACEIDR: Trace ID Register

Purpose

Sets the trace ID for instruction trace.

Configuration

External register TRCTRACEIDR bits [31:0] are architecturally mapped to AArch64 System register TRCTRACEIDR[31:0].

This register is present only when FEAT_ETE is implemented and FEAT_TRC_EXT is implemented. Otherwise, direct accesses to TRCTRACEIDR are RES0.

Attributes

TRCTRACEIDR is a 32-bit register.

Field descriptions

313029282726252423222120191817161514131211109876543210
RES0TRACEID

Bits [31:7]

Reserved, RES0.

TRACEID, bits [6:0]

Trace ID field. Sets the trace ID value for instruction trace. The width of the field is indicated by the value of TRCIDR5.TRACEIDSIZE. Unimplemented bits are RES0.

If an implementation supports AMBA ATB, then:

See the AMBA ATB Protocol Specification for information about which ATID values are reserved.

The reset behavior of this field is:

Accessing TRCTRACEIDR

Must be programmed if implemented.

Writes are CONSTRAINED UNPREDICTABLE if the trace unit is not in the Idle state.

TRCTRACEIDR can be accessed through the external debug interface:

ComponentOffsetInstance
ETE0x040TRCTRACEIDR

This interface is accessible as follows: