TRCPRGCTLR: Trace Programming Control Register

Purpose

Enables the trace unit.

Configuration

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

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

Attributes

TRCPRGCTLR is a 32-bit register.

Field descriptions

Bits [31:1]

EN, bit [0]

Accessing TRCPRGCTLR

Must be programmed.

TRCPRGCTLR can be accessed through the external debug interface:

This interface is accessible as follows:

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