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| author | Pierre Gondois <Pierre.Gondois@arm.com> | 2021-10-08 15:46:31 +0100 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2021-10-08 15:39:42 +0000 |
| commit | f17ef10e635036ddbc05791371b552beda8e0504 (patch) | |
| tree | 514419e2041c92515ffe87218aa1514af96e881c /DynamicTablesPkg/Include | |
| parent | a5e36ad9bcd945be98a50ff57170e85df7fda368 (diff) | |
| download | edk2-f17ef10e635036ddbc05791371b552beda8e0504.tar.gz edk2-f17ef10e635036ddbc05791371b552beda8e0504.tar.bz2 edk2-f17ef10e635036ddbc05791371b552beda8e0504.zip | |
DynamicTablesPkg: Add CM_ARM_LPI_INFO object
Introduce the CM_ARM_LPI_INFO CmObj in the ArmNameSpaceObjects.
This allows to describe LPI state information, as described in
ACPI 6.4, s8.4.4.3 "_LPI (Low Power Idle States)".
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>
Diffstat (limited to 'DynamicTablesPkg/Include')
| -rw-r--r-- | DynamicTablesPkg/Include/ArmNameSpaceObjects.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h index 2244eafaf0..f19c9c7066 100644 --- a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h +++ b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h @@ -58,6 +58,7 @@ typedef enum ArmObjectID { EArmObjGenericInitiatorAffinityInfo, ///< 34 - Generic Initiator Affinity
EArmObjSerialPortInfo, ///< 35 - Generic Serial Port Info
EArmObjCmn600Info, ///< 36 - CMN-600 Info
+ EArmObjLpiInfo, ///< 37 - Lpi Info
EArmObjMax
} EARM_OBJECT_ID;
@@ -711,6 +712,10 @@ typedef struct CmArmProcHierarchyInfo { /// the NoOfPrivateResources is 0, in which case it is recommended to set
/// this field to CM_NULL_TOKEN.
CM_OBJECT_TOKEN PrivateResourcesArrayToken;
+ /// Optional field: Reference Token for the Lpi state of this processor.
+ /// Token identifying a CM_ARM_OBJ_REF structure, itself referencing
+ /// CM_ARM_LPI_INFO objects.
+ CM_OBJECT_TOKEN LpiToken;
} CM_ARM_PROC_HIERARCHY_INFO;
/** A structure that describes the Cache Type Structure (Type 1) in PPTT
@@ -878,6 +883,69 @@ typedef struct CmArmCmn600Info { CM_ARM_EXTENDED_INTERRUPT DtcInterrupt[4];
} CM_ARM_CMN_600_INFO;
+/** 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
+*/
+typedef struct CmArmLpiInfo {
+ /** Minimum Residency. Time in microseconds after which a
+ state becomes more energy efficient than any shallower state.
+ */
+ UINT32 MinResidency;
+
+ /** Worst case time in microseconds from a wake interrupt
+ being asserted to the return to a running state
+ */
+ UINT32 WorstCaseWakeLatency;
+
+ /** Flags.
+ */
+ UINT32 Flags;
+
+ /** Architecture specific context loss flags.
+ */
+ UINT32 ArchFlags;
+
+ /** Residency counter frequency in cycles-per-second (Hz).
+ */
+ UINT32 ResCntFreq;
+
+ /** Every shallower power state in the parent is also enabled.
+ */
+ UINT32 EnableParentState;
+
+ /** 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.
+ */
+ BOOLEAN IsInteger;
+
+ /** EntryMethod described as an Integer.
+ */
+ UINT64 IntegerEntryMethod;
+
+ /** EntryMethod described as a EFI_ACPI_GENERIC_REGISTER_DESCRIPTOR.
+ */
+ EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE RegisterEntryMethod;
+
+ /** Residency counter register.
+ */
+ EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE ResidencyCounterRegister;
+
+ /** Usage counter register.
+ */
+ EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE UsageCounterRegister;
+
+ /** String representing the Lpi state
+ */
+ CHAR8 StateName[16];
+} CM_ARM_LPI_INFO;
+
#pragma pack()
#endif // ARM_NAMESPACE_OBJECTS_H_
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