The EDDEVID characteristics are:
Provides extra information for external debuggers about features of the debug implementation.
When FEAT_DoPD is implemented, EDDEVID is in the Core power domain. Otherwise, EDDEVID is in the Debug power domain.
EDDEVID 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 | AuxRegs | RES0 | DebugPower | PCSample | |||||||||||||||||||||||||||
Reserved, RES0.
Indicates support for Auxiliary registers.
The value of this field is an IMPLEMENTATION DEFINED choice of:
| AuxRegs | Meaning |
|---|---|
| 0b0000 |
None supported. |
| 0b0001 |
Support for External Debug Auxiliary Control Register, EDACR. |
All other values are reserved.
Access to this field is RO.
Reserved, RES0.
Indicates support for the FEAT_DoPD feature.
The value of this field is an IMPLEMENTATION DEFINED choice of:
| DebugPower | Meaning |
|---|---|
| 0b0000 |
FEAT_DoPD not implemented. Registers in the external debug interface register map are implemented in a mix of the Debug and Core power domains. |
| 0b0001 |
FEAT_DoPD implemented. All registers in the external debug interface register map are implemented in the Core power domain. |
FEAT_DoPD implements the functionality added by the value 0b0001.
All other values are reserved.
Access to this field is RO.
Indicates the level of PC Sample-based Profiling support using external debug registers.
The value of this field is an IMPLEMENTATION DEFINED choice of:
| 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_PCSRv8p2 is implemented, the only permitted value is 0b0000.
FEAT_PCSRv8p2 implements the PC Sample-based Profiling Extension in the Performance Monitors register space, as indicated by the value of PMDEVID.PCSample.
Access to this field is RO.
| Component | Offset | Instance |
|---|---|---|
| Debug | 0xFC8 | EDDEVID |
This interface is accessible as follows:
26/03/2024 09:49; 67c0ae5282a7629ba0ea0ba7267b43cd4f7939f6
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