MRC instructions for accesing PMU register in SOC with different processor

I had an Soc with t A55 arch and R52 core. I can acees the PMU of register with below command of PMU control register of A55 core. asm volatile("mrs %0, pmccntr_el0" : "=r" (value)); Is there...
What's the difference between core, processor,cluster and CPU in ARM architecture?

What's the difference between core, processor,cluster and CPU?
What's the difference between core, processor,cluster and CPU in ARM architecture?

What's the difference between core, processor,cluster and CPU?
GNU Toolchain - Unknown or missing system register (GIC register - Cortex-A53)

I have started a simple bare-metal project for the Cortex-A53. Now I want to implement interrupt handling, but run into an issue with the toolchain. Want to read out and write into the ICC_x registers...
GNU Toolchain - Unknown or missing system register (GIC register - Cortex-A53)

I have started a simple bare-metal project for the Cortex-A53. Now I want to implement interrupt handling, but run into an issue with the toolchain. Want to read out and write into the ICC_x registers...