The PMDEVID characteristics are:
Provides information about features of the Performance Monitors implementation.
This register is part of the Performance Monitors registers functional group.
This register is accessible as follows:
Default |
---|
RO |
PMDEVID is in the Debug power domain.
This register is required from ARMv8.2 and in any implementation that includes ARMv8.2-PCSample. Otherwise, its location is RES0.
Before ARMv8.2, the PC Sample-based Profiling Extension can be implemented in the external debug register space, as indicated by the value of EDDEVID.PCSample.
PMDEVID is a 32-bit register.
The PMDEVID 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 |
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | PCSample |
Reserved, RES0.
Indicates the level of PC Sample-based Profiling support using Performance Monitors registers. Permitted values of this field are:
PCSample | Meaning |
---|---|
0000 |
PC Sample-based Profiling Extension is not implemented in the Performance Monitors register space. |
0001 |
PC Sample-based Profiling Extension is implemented in the Performance Monitors register space. |
All other values are reserved.
ARMv8.2-PCSample implements the functionality identified by the value 0001.
PMDEVID can be accessed through the external debug interface:
Component | Offset |
---|---|
PMU | 0xFC8 |
28/09/2017 08:24
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