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TRCEVENTCTL0R: Trace Event Control 0 Register

Purpose

Controls the generation of ETEEvents.

Configuration

External register TRCEVENTCTL0R bits [31:0] are architecturally mapped to AArch64 System register TRCEVENTCTL0R[31:0].

This register is present only when FEAT_ETE is implemented, FEAT_TRC_EXT is implemented and TRCIDR4.NUMRSPAIR != 0b0000. Otherwise, direct accesses to TRCEVENTCTL0R are RES0.

Attributes

TRCEVENTCTL0R is a 32-bit register.

Field descriptions

313029282726252423222120191817161514131211109876543210
EVENT3_TYPERES0EVENT3_SELEVENT2_TYPERES0EVENT2_SELEVENT1_TYPERES0EVENT1_SELEVENT0_TYPERES0EVENT0_SEL

EVENT3_TYPE, bit [31]

When TRCIDR4.NUMRSPAIR != 0b0000 and UInt(TRCIDR0.NUMEVENT) >= 3:

Chooses the type of Resource Selector.

EVENT3_TYPEMeaning
0b0

A single Resource Selector.

TRCEVENTCTL0R.EVENT3.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.

TRCEVENTCTL0R.EVENT3.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. TRCEVENTCTL0R.EVENT3.SEL[4] is RES0.

The reset behavior of this field is:



Otherwise:

Reserved, RES0.

Bits [30:29]

Reserved, RES0.

EVENT3_SEL, bits [28:24]

When TRCIDR4.NUMRSPAIR != 0b0000 and UInt(TRCIDR0.NUMEVENT) >= 3:

When any of the selected resource events occurs and TRCEVENTCTL1R.INSTEN[3] == 1, then Event element 3 is generated in the instruction trace element stream.

Defines the selected Resource Selector or pair of Resource Selectors. TRCEVENTCTL0R.EVENT3.TYPE controls whether TRCEVENTCTL0R.EVENT3.SEL is the index of a single Resource Selector, or the index of a pair of Resource Selectors.

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:



Otherwise:

Reserved, RES0.

EVENT2_TYPE, bit [23]

When TRCIDR4.NUMRSPAIR != 0b0000 and UInt(TRCIDR0.NUMEVENT) >= 2:

Chooses the type of Resource Selector.

EVENT2_TYPEMeaning
0b0

A single Resource Selector.

TRCEVENTCTL0R.EVENT2.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.

TRCEVENTCTL0R.EVENT2.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. TRCEVENTCTL0R.EVENT2.SEL[4] is RES0.

The reset behavior of this field is:



Otherwise:

Reserved, RES0.

Bits [22:21]

Reserved, RES0.

EVENT2_SEL, bits [20:16]

When TRCIDR4.NUMRSPAIR != 0b0000 and UInt(TRCIDR0.NUMEVENT) >= 2:

When any of the selected resource events occurs and TRCEVENTCTL1R.INSTEN[2] == 1, then Event element 2 is generated in the instruction trace element stream.

Defines the selected Resource Selector or pair of Resource Selectors. TRCEVENTCTL0R.EVENT2.TYPE controls whether TRCEVENTCTL0R.EVENT2.SEL is the index of a single Resource Selector, or the index of a pair of Resource Selectors.

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:



Otherwise:

Reserved, RES0.

EVENT1_TYPE, bit [15]

When TRCIDR4.NUMRSPAIR != 0b0000 and UInt(TRCIDR0.NUMEVENT) >= 1:

Chooses the type of Resource Selector.

EVENT1_TYPEMeaning
0b0

A single Resource Selector.

TRCEVENTCTL0R.EVENT1.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.

TRCEVENTCTL0R.EVENT1.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. TRCEVENTCTL0R.EVENT1.SEL[4] is RES0.

The reset behavior of this field is:



Otherwise:

Reserved, RES0.

Bits [14:13]

Reserved, RES0.

EVENT1_SEL, bits [12:8]

When TRCIDR4.NUMRSPAIR != 0b0000 and UInt(TRCIDR0.NUMEVENT) >= 1:

When any of the selected resource events occurs and TRCEVENTCTL1R.INSTEN[1] == 1, then Event element 1 is generated in the instruction trace element stream.

Defines the selected Resource Selector or pair of Resource Selectors. TRCEVENTCTL0R.EVENT1.TYPE controls whether TRCEVENTCTL0R.EVENT1.SEL is the index of a single Resource Selector, or the index of a pair of Resource Selectors.

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:



Otherwise:

Reserved, RES0.

EVENT0_TYPE, bit [7]

When TRCIDR4.NUMRSPAIR != 0b0000:

Chooses the type of Resource Selector.

EVENT0_TYPEMeaning
0b0

A single Resource Selector.

TRCEVENTCTL0R.EVENT0.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.

TRCEVENTCTL0R.EVENT0.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. TRCEVENTCTL0R.EVENT0.SEL[4] is RES0.

The reset behavior of this field is:



Otherwise:

Reserved, RES0.

Bits [6:5]

Reserved, RES0.

EVENT0_SEL, bits [4:0]

When TRCIDR4.NUMRSPAIR != 0b0000:

When any of the selected resource events occurs and TRCEVENTCTL1R.INSTEN[0] == 1, then Event element 0 is generated in the instruction trace element stream.

Defines the selected Resource Selector or pair of Resource Selectors. TRCEVENTCTL0R.EVENT0.TYPE controls whether TRCEVENTCTL0R.EVENT0.SEL is the index of a single Resource Selector, or the index of a pair of Resource Selectors.

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:



Otherwise:

Reserved, RES0.

Accessing TRCEVENTCTL0R

Must be programmed if implemented.

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

TRCEVENTCTL0R can be accessed through the external debug interface:

ComponentOffsetInstance
ETE0x020TRCEVENTCTL0R

This interface is accessible as follows: