[U-Boot] [PATCH v2 1/3] arm: psci: save context id for cpu_on PSCI command

[Stephen Warren]

On 04/16/2018 02:13 AM, Patrick Delaunay wrote:
> Save and use the 3rd parameter of PSCI CPU_ON request: context_id.
> 
> The context_id parameter is only meaningful to the caller.
> U-Boot PSCI preserves a copy of the value passed in this parameter.
> Following wakeup from a  powerdown state, U-BOOT PSCI places
> this value in R0 when it first enters the OS.
> 
> NB: this context id is not (yet?) used by Linux but it is mandatory
>      to be PSCI compliant.
> 
> update armv7 psci functions:
> - psci_save_target_pc(): keep for backward compatibility with
>    current platform (only save PC and force context id to 0)
>    => should be removed when all platform migrate to the new API
> 
> - psci_save(): new API to use by ARMv7 platform with PSCI,
>    save pc (= entry_point_address) and context_id

Reviewed-by: Stephen Warren <swarren at nvidia.com>