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

[Masahiro Yamada]

2018-04-16 17:13 GMT+09:00 Patrick Delaunay <patrick.delaunay at st.com>:
> 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
>
> Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
> ---
>
> Changes in v2: None


Reviewed-by: Masahiro Yamada <yamada.masahiro at socionext.com>




-- 
Best Regards
Masahiro Yamada