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Arm Cortex-A55 Core Technical Reference Manual : TRCSTATR, Status Register

TRCSTATR, Status Register

The TRCSTATR indicates the ETM trace unit status.

Bit field descriptions

Figure D8-65 TRCSTATR bit assignments


RES0, [31:2]
res0Reserved.
PMSTABLE, [1]

Indicates whether the ETM trace unit registers are stable and can be read:

0The programmers model is not stable.
1The programmers model is stable.
IDLE, [0]

Idle status:

0The ETM trace unit is not idle.
1The ETM trace unit is idle.

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 TRCSTATR can be accessed through the external debug interface, offset 0x00C.

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