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
Figure D8-48 TRCOSLAR bit assignments
- RES0, [31:1]
- OSLK, 
OS Lock key value:
Unlock the OS Lock.
Lock the OS Lock.
Bit fields and details not provided in this description are architecturally defined. See the Arm® Architecture Reference Manual Armv8, for Armv8-A architecture profile.
The TRCOSLAR can be accessed through the external debug interface, offset