Data Fields
UINT32	MinResidency

UINT32	WorstCaseWakeLatency

UINT32	Flags

UINT32	ArchFlags

UINT32	ResCntFreq

UINT32	EnableParentState

BOOLEAN	IsInteger

UINT64	IntegerEntryMethod

EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE	RegisterEntryMethod

EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE	ResidencyCounterRegister

EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE	UsageCounterRegister

CHAR8	StateName [16]

Detailed Description

A structure that describes the Lpi information.

The Low Power Idle states are described in DSDT/SSDT and associated to cpus/clusters in the cpu topology.

ID: EArmObjLpiInfo

Field Documentation

UINT32 CmArmLpiInfo::ArchFlags

Architecture specific context loss flags.

UINT32 CmArmLpiInfo::EnableParentState

Every shallower power state in the parent is also enabled.

UINT32 CmArmLpiInfo::Flags

Flags.

UINT64 CmArmLpiInfo::IntegerEntryMethod

EntryMethod described as an Integer.

BOOLEAN CmArmLpiInfo::IsInteger

The EntryMethod _LPI field can be described as an integer or in a Register resource data descriptor.

If IsInteger is TRUE, the IntegerEntryMethod field is used. If IsInteger is FALSE, the RegisterEntryMethod field is used.

UINT32 CmArmLpiInfo::MinResidency

Minimum Residency. Time in microseconds after which a state becomes more energy efficient than any shallower state.

EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE CmArmLpiInfo::RegisterEntryMethod

EntryMethod described as a EFI_ACPI_GENERIC_REGISTER_DESCRIPTOR.

UINT32 CmArmLpiInfo::ResCntFreq

Residency counter frequency in cycles-per-second (Hz).

EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE CmArmLpiInfo::ResidencyCounterRegister

Residency counter register.

CHAR8 CmArmLpiInfo::StateName[16]

String representing the Lpi state

EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE CmArmLpiInfo::UsageCounterRegister

Usage counter register.

UINT32 CmArmLpiInfo::WorstCaseWakeLatency

Worst case time in microseconds from a wake interrupt being asserted to the return to a running state