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TRCOSLAR, OS Lock Access Register

The TRCOSLAR sets and clears the OS Lock, to lock out external debugger accesses to the ETM trace unit registers.

Bit field descriptions

The TRCOSLAR is a 32-bit register.

Figure D10-49 TRCOSLAR bit assignments

RES0, [31:1]
OSLK, [0]

OS Lock key value:

0Unlock the OS Lock.
1Lock the OS Lock.

Bit fields and details not provided in this description are architecturally defined. See the Arm® Embedded Trace Macrocell Architecture Specification ETMv4.

The TRCOSLAR can be accessed through the external debug interface, offset 0x300.