TRCSEQEVR<n>

External register TRCSEQEVR<n> bits [31:0] are architecturally mapped to AArch64 System register TRCSEQEVR<n>[31:0].

This register is present only when FEAT_ETE is implemented, FEAT_TRC_EXT is implemented and TRCIDR5.NUMSEQSTATE != 0b000. Otherwise, direct accesses to TRCSEQEVR<n> are RES0.

Attributes

Field descriptions

Bits [31:16]

B_TYPE, bit [15]

Chooses the type of Resource Selector.

Backward field. Defines whether the backward resource event is a single Resource Selector or a Resource Selector pair. When the resource event occurs then the Sequencer state moves from state n+1 to state n. For example, if TRCSEQEVR2.B.SEL == 0x14 then when event 0x14 occurs, the Sequencer moves from state 3 to state 2.

B_TYPE	Meaning
0b0	A single Resource Selector. TRCSEQEVR<n>.B.SEL[4:0] selects the single Resource Selector, from 0-31, used to activate the resource event.
0b1	A Boolean-combined pair of Resource Selectors. TRCSEQEVR<n>.B.SEL[3:0] selects the Resource Selector pair, from 0-15, that has a Boolean function that is applied to it whose output is used to activate the resource event. TRCSEQEVR<n>.B.SEL[4] is RES0.

B_TYPE

Meaning

0b0

A single Resource Selector.

TRCSEQEVR<n>.B.SEL[4:0] selects the single Resource Selector, from 0-31, used to activate the resource event.

0b1

A Boolean-combined pair of Resource Selectors.

TRCSEQEVR<n>.B.SEL[3:0] selects the Resource Selector pair, from 0-15, that has a Boolean function that is applied to it whose output is used to activate the resource event. TRCSEQEVR<n>.B.SEL[4] is RES0.

The reset behavior of this field is:

On a Trace unit reset, this field resets to an architecturally UNKNOWN value.

Bits [14:13]

B_SEL, bits [12:8]

Defines the selected Resource Selector or pair of Resource Selectors. TRCSEQEVR<n>.B.TYPE controls whether TRCSEQEVR<n>.B.SEL is the index of a single Resource Selector, or the index of a pair of Resource Selectors.

Backward field. Selects the single Resource Selector or Resource Selector pair.

If an unimplemented Resource Selector is selected using this field, the behavior of the resource event is UNPREDICTABLE, and the resource event might fire or might not fire when the resources are not in the Paused state.

Selecting Resource Selector pair 0 using this field is UNPREDICTABLE, and the resource event might fire or might not fire when the resources are not in the Paused state.

The reset behavior of this field is:

On a Trace unit reset, this field resets to an architecturally UNKNOWN value.

F_TYPE, bit [7]

Chooses the type of Resource Selector.

Backward field. Defines whether the forward resource event is a single Resource Selector or a Resource Selector pair. When the resource event occurs then the Sequencer state moves from state n to state n+1. For example, if TRCSEQEVR1.F.SEL == 0x12 then when event 0x12 occurs, the Sequencer moves from state 1 to state 2.

F_TYPE	Meaning
0b0	A single Resource Selector. TRCSEQEVR<n>.F.SEL[4:0] selects the single Resource Selector, from 0-31, used to activate the resource event.
0b1	A Boolean-combined pair of Resource Selectors. TRCSEQEVR<n>.F.SEL[3:0] selects the Resource Selector pair, from 0-15, that has a Boolean function that is applied to it whose output is used to activate the resource event. TRCSEQEVR<n>.F.SEL[4] is RES0.

F_TYPE

Meaning

0b0

A single Resource Selector.

TRCSEQEVR<n>.F.SEL[4:0] selects the single Resource Selector, from 0-31, used to activate the resource event.

0b1

A Boolean-combined pair of Resource Selectors.

TRCSEQEVR<n>.F.SEL[3:0] selects the Resource Selector pair, from 0-15, that has a Boolean function that is applied to it whose output is used to activate the resource event. TRCSEQEVR<n>.F.SEL[4] is RES0.

The reset behavior of this field is:

On a Trace unit reset, this field resets to an architecturally UNKNOWN value.

Bits [6:5]

F_SEL, bits [4:0]

Defines the selected Resource Selector or pair of Resource Selectors. TRCSEQEVR<n>.F.TYPE controls whether TRCSEQEVR<n>.F.SEL is the index of a single Resource Selector, or the index of a pair of Resource Selectors.

Forward field. Selects the single Resource Selector or Resource Selector pair.

Selecting Resource Selector pair 0 using this field is UNPREDICTABLE, and the resource event might fire or might not fire when the resources are not in the Paused state.

The reset behavior of this field is:

On a Trace unit reset, this field resets to an architecturally UNKNOWN value.

Accessing TRCSEQEVR<n>

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

TRCSEQEVR<n> can be accessed through the external debug interface:

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																B_TYPE	RES0		B_SEL					F_TYPE	RES0		F_SEL

TRCSEQEVR<n>, Trace Sequencer State Transition Control Register <n>, n = 0 - 2

Purpose

Configuration

Attributes

Field descriptions

Bits [31:16]

B_TYPE, bit [15]

Bits [14:13]

B_SEL, bits [12:8]

F_TYPE, bit [7]

Bits [6:5]

F_SEL, bits [4:0]

Accessing TRCSEQEVR<n>

TRCSEQEVR<n> can be accessed through the external debug interface: