How to compare ACPI states (Sx, Cx) with ARM Cortex-A processor states (Standby, Retention, Power Down, Dormant Mode, Hotplug, Stop, Deep Sleep) ?

Hello, I'm a student and I'm interested in how to compare ACPI Sleep States (Sx) and processor power states (Cx) with ARM Cortex-A states e.g. Standby, Retention, Power Down, Dormant Mode, Hotplug, Stop...
How to compare ACPI states (Sx, Cx) with ARM Cortex-A processor states (Standby, Retention, Power Down, Dormant Mode, Hotplug, Stop, Deep Sleep) ?

Hello, I'm a student and I'm interested in how to compare ACPI Sleep States (Sx) and processor power states (Cx) with ARM Cortex-A states e.g. Standby, Retention, Power Down, Dormant Mode, Hotplug, Stop...
How to construct any variable retention like PLC systems?

When the power supply shutting down, value of some variables is important and need to retention. How to construct it? I used static ,extern, to define this variable, but fail. Chip board:STM32F0Discovery...
How to construct any variable retention like PLC systems?

When the power supply shutting down, value of some variables is important and need to retention. How to construct it? I used static ,extern, to define this variable, but fail. Chip board:STM32F0Discovery...
CA55 snoop response behavior when cache line is clean

A system with CA55,DDR,System NOC Which interconnected using a CCI550. 1.CA55 Read address 0xA from DDR and store in cache. 2.System Noc send read address 0xA to CCI550 3.CA550 snoop filter hit...