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PMCID2SR, CONTEXTIDR_EL2 Sample Register

The PMCID2SR characteristics are:

Purpose

Contains the sampled value of CONTEXTIDR_EL2, captured on reading PMU.PMPCSR[31:0].PMPCSR[31:0].

Configuration

ThisPMCID2SR register is presentin onlythe whenCore FEAT_PMUv3_EXT32power is implemented. Otherwise, direct accesses to PMCID2SR aredomain. RES0.

If FEAT_PMUv3_EXT64 is implemented, the same content is present in the same location, and can be accessed using PMCCIDSR[63:32].

This register is present only when FEAT_PCSRv8p2 is implemented and EL2 is implemented. Otherwise, direct accesses to PMCID2SR are RES0.

PMCIDR2SR is in the Core power domain.

Note

If FEAT_PCSRv8p2 is not implemented, the PC Sample-based Profiling Extension can be implemented in the external debug register space, as indicated by the value of EDDEVID.PCSample.

Attributes

PMCID2SR is a 32-bit register.

This register is part of the PMU block.

Field descriptions

313029282726252423222120191817161514131211109876543210
CONTEXTIDR_EL2

CONTEXTIDR_EL2, bits [31:0]

Context ID. The value of CONTEXTIDR_EL2 that is associated with the most recent PMU.PMPCSR sample. When the most recent PMU.PMPCSR sample is generated:PMPCSR sample. When the most recent PMPCSR sample is generated:

Because the value written to this fieldPMCID2SR is an indirect read of CONTEXTIDR_EL2, it is CONSTRAINED UNPREDICTABLE whether thisPMCID2SR field is set to the original or new value if PMU.PMPCSR samples:PMPCSR samples:

The reset behavior of this field is:

Accessing PMCID2SR

IMPLEMENTATION DEFINED extensions to external debug might make the value of this register UNKNOWN, see 'Permitted behavior that might make the PC Sample-based profiling registers UNKNOWN'.

PMCID2SR can be accessed through the external debug interface:

ComponentOffsetInstance
PMU0x22CPMCID2SR

This interface is accessible as follows:

Accessing PMCID2SR

IMPLEMENTATION DEFINED extensions to external debug might make the value of this register UNKNOWN, see 'Permitted behavior that might make the PC Sample-based profiling registers UNKNOWN'.

Accesses to this register use the following encodings in the external debug interface:

BlockAccess at address 0x22C

PMCID2SR can be accessed through the PMU block as follows:

FrameOffset
PMU0x22C

3005/0907/2022 1517:5708; 21c5a6dd0fdaf10a712e2f2d6fffbdbd66d4d96fb0421fa9a8865165f9b91af9b4a566111f866305

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