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The TRCOSLAR sets and clears the OS Lock, to lock out external debugger accesses to the ETM trace unit registers.
The TRCOSLAR is a 32-bit register.
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