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The CNTSR characteristics are:
Provides counter frequency status information.
The power domain of CNTSR is IMPLEMENTATION DEFINED.
Some or all RW fields of this register have defined reset values. These apply only on a reset of the reset domain in which the register is implemented. The register is not affected by a reset of any other reset domain.
For more information see 'Power and reset domains for the system level implementation of the Generic Timer' in the Arm® Architecture Reference Manual, Armv8, for Armv8-A architecture profile.
CNTSR is a 32-bit register.
The CNTSR 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 |
FCACK | RES0 | DBGH | RES0 |
Frequency change acknowledge. Indicates the currently selected entry in the Frequency modes table, see 'The Frequency modes table' in Chapter I1 of the Arm® Architecture Reference Manual, Armv8, for Armv8-A architecture profile.
This field resets to 0.
Reserved, RES0.
Indicates whether the counter is halted because the Halt-on-debug signal is asserted:
DBGH | Meaning |
---|---|
0b0 | Counter is not halted. |
0b1 | Counter is halted. |
This field resets to an architecturally UNKNOWN value.
Reserved, RES0.
In a system that supports Secure and Non-secure memory maps the CNTControlBase frame, that includes this register, is implemented only in the Secure memory map.
Component | Frame | Offset | Instance |
---|---|---|---|
Timer | CNTControlBase | 0x004 | CNTSR |
Accesses on this interface are RO.
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