When writing a driver for ARM A64 CPU, we need to write some ASM functions that are then used by C. In this case, we may need to use some general-purpose registers to implement logic functions. So, …
read more…

ARMv8 designs a synchronization model to provide non-blocking synchronization. This model includes the following key elements: * Load-Exclusive / Store-Exclusive instruction pair and Clear-Exclu…
read more…

* These instructions are used to implement the following mechanisms for power saving (Put a PE into low-power state that is IMPLEMENTATION DEFINED). * Wait for event (WFE/WFET, SEV/SEVL) * T…
read more…