TRCRSR, Trace Resources Status Register

The TRCRSR characteristics are:

Purpose

Use this to set, or read, the status of the resources.

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

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

TRCRSR is a 32-bit register.

31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
RES0																			TA	EVENT[3]	EVENT[2]	EVENT[1]	EVENT[0]	RES0				EXTIN[3]	EXTIN[2]	EXTIN[1]	EXTIN[0]

Reserved, RES0.

Tracing active.

TA	Meaning
0b0	Tracing is not active.
0b1	Tracing is active.

The reset behavior of this field is:

Untraced status of ETEEvents.

EVENT[<m>]	Meaning
0b0	An ETEEvent <m> has not occurred.
0b1	An ETEEvent <m> has occurred while the resources were in the Paused state.

The reset behavior of this field is:

Accessing this field has the following behavior:

Reserved, RES0.

The sticky status of the External Input Selectors.

EXTIN[<m>]	Meaning
0b0	An event selected by External Input Selector <m> has not occurred.
0b1	At least one event selected by External Input Selector <m> has occurred while the resources were in the Paused state.

The reset behavior of this field is:

Accessing this field has the following behavior:

Must always be programmed.

Writes are CONSTRAINED UNPREDICTABLE if the trace unit is not in the Idle state.

Reads from this register might return an UNKNOWN value if the trace unit is not in either of the Idle or Stable states.

Component	Offset	Instance
ETE	0x028	TRCRSR

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.

26/03/2024 09:49; 67c0ae5282a7629ba0ea0ba7267b43cd4f7939f6