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p9_stop_api's are used to set SPR state on a core wakeup form a deeper
low power state. p9_stop_api uses low level platform formware and
self-restore microcode to restore the sprs to requested values.
Code is taken from :
https://github.com/open-power/hostboot/tree/master/src/import/chips/p9/procedures/utils/stopreg
Signed-off-by: Akshay Adiga <akshay.adiga@linux.vnet.ibm.com>
Reviewed-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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