TRCSTATR, Trace Status Register

The TRCSTATR characteristics are:

Purpose

Returns the trace unit status.

Configuration

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

This register is present only when ETE is implemented. Otherwise, direct accesses to TRCSTATR are RES0.

Attributes

TRCSTATR is a 32-bit register.

Field descriptions

The TRCSTATR bit assignments are:

Bits [31:2]

Reserved, RES0.

PMSTABLE, bit [1]

Programmers' model stable.

This bit is UNKNOWN while the trace unit is enabled.

IDLE, bit [0]

Idle status.

Accessing the TRCSTATR

TRCSTATR can be accessed through the external debug interface:

This interface is accessible as follows:

• When !AllowExternalTraceAccess(), or OSLockStatus() or !IsTraceCorePowered() accesses to this register generate an error response.
• Otherwise accesses to this register are RO.