[Skiboot] [PATCH v4 1/8] SLW: Add support for p9_stop_api

Akshay Adiga akshay.adiga at linux.vnet.ibm.com
Fri Sep 15 19:55:02 AEST 2017



On 09/15/2017 01:53 PM, Vaidyanathan Srinivasan wrote:
> * Akshay Adiga <akshay.adiga at linux.vnet.ibm.com> [2017-09-15 13:04:29]:
>
>> p9_stop_api's are used to SPR state on a core wakeup form a deeper state.
>                            ^set                                 ^^ deeper low power state
>
>> p9_stop_api uses  low level platform formware and self-restore microcode
>                                         ^firmware
>> to restore the sprs to requested values.
>                                         ^ before control is passed to
>                                         Linux at 0x100 vector.
>
>
>> Code is taken from :
>> https://github.com/open-power/hostboot/tree/master/src/import/chips/p9/procedures/utils/stopreg
>
> This routine is a hardware procedure borrowed from hostboot source at:
> https://github.com/open-power/hostboot/tree/master/src/import/chips/p9/procedures/utils/stopreg
>
>> Signed-off-by: Akshay Adiga <akshay.adiga at linux.vnet.ibm.com>
>
> Reviewed-by: Vaidyanathan Srinivasan <svaidy at linux.vnet.ibm.com>

Thanks Vaidy, will change commit message and send the next version



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