The maximum clock rates for the ARM Cortex-A9 APU can be found in the Zynq-7000 AP SoC datasheets:
To find the clock frequency at which the processor is running at a given time, use the following command in Linux:
cat /proc/cpuinfo
| Answer Number | Answer Title | Version Found | Version Resolved |
|---|---|---|---|
| 52599 | Zynq-7000 AP SoC - Operating Systems Development | N/A | N/A |