pci express architecture power management

ThispaperpresentspowermanagementguidelinesforPCIExpresslinksonIntel-basedMobileplatforms.Itdescribesthemappingfromplatformsleepingstatesanddevicepowerstatestolinkpowerstates,includingtheproceduretosupportMobile-specificS1/POSandCPUC3/C4scenarios.Deviceandplatformpowersavingopportunities