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The EDDEVID characteristics are:
Provides extra information for external debuggers about features of the debug implementation.
If FEAT_DoPDARMv8.3-DoPD is implemented, this register is in the Core power domain.
If FEAT_DoPDARMv8.3-DoPD is not implemented, this register is in the Debug power domain.
EDDEVID is a 32-bit register.
The EDDEVID bit assignments are:
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 | AuxRegs | RES0 | DebugPower | PCSample |
Reserved, RES0.
Indicates support for Auxiliary registers. Defined values are:
AuxRegs | Meaning |
---|---|
0b0000 | None supported. |
0b0001 | Support for External Debug Auxiliary Control Register, EDACR. |
All other values are reserved.
Reserved, RES0.
Indicates support for the FEAT_DoPDARMv8.3-DoPD feature. Defined values are:
DebugPower | Meaning |
---|---|
0b0000 | FEAT_DoPD |
0b0001 | FEAT_DoPD |
FEAT_DoPDARMv8.3-DoPD implements the functionality added by the value 0b0001.
All other values are reserved.
Indicates the level of PC Sample-based Profiling support using external debug registers. Defined values are:
PCSample | Meaning |
---|---|
0b0000 | PC Sample-based Profiling Extension is not implemented in the external debug registers space. |
0b0010 | Only EDPCSR and EDCIDSR are implemented. This option is only permitted if EL3 and EL2 are not implemented. |
0b0011 |
All other values are reserved.
When FEAT_PCSRv8p2ARMv8.2-PCSample is implemented, the only permitted value is 0b0000.
FEAT_PCSRv8p2ARMv8.2-PCSample implements the PC Sample-based Profiling Extension in the Performance Monitors register space, as indicated by the value of PMDEVID.PCSample.
Component | Offset | Instance |
---|---|---|
Debug | 0xFC8 | EDDEVID |
This interface is accessible as follows:
0114/0704/2020 1520:5709; 80324f0b9997bede489cc15ad1565345720bcd2adff0d3e465311dd9ce541b6a1e1d6c05a0668645
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