mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-27 12:15:19 +01:00
77 lines
2.6 KiB
C
77 lines
2.6 KiB
C
/** @file
|
|
ACPI Low Power Idle Table (LPIT) definitions
|
|
|
|
Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
@par Revision Reference:
|
|
- ACPI Low Power Idle Table (LPIT) Revision 001, dated July 2014
|
|
http://www.uefi.org/sites/default/files/resources/ACPI_Low_Power_Idle_Table.pdf
|
|
|
|
@par Glossary:
|
|
- GAS - Generic Address Structure
|
|
- LPI - Low Power Idle
|
|
**/
|
|
#ifndef _LOW_POWER_IDLE_TABLE_H_
|
|
#define _LOW_POWER_IDLE_TABLE_H_
|
|
|
|
#include <IndustryStandard/Acpi.h>
|
|
|
|
#pragma pack(1)
|
|
|
|
///
|
|
/// LPI Structure Types
|
|
///
|
|
#define ACPI_LPI_STRUCTURE_TYPE_NATIVE_CSTATE 0x00
|
|
|
|
///
|
|
/// Low Power Idle (LPI) State Flags
|
|
///
|
|
typedef union {
|
|
struct {
|
|
UINT32 Disabled : 1; ///< If set, LPI state is not used
|
|
/**
|
|
If set, Residency counter is not available for this LPI state and
|
|
Residency Counter Frequency is invalid
|
|
**/
|
|
UINT32 CounterUnavailable : 1;
|
|
UINT32 Reserved : 30; ///< Reserved for future use. Must be zero
|
|
} Bits;
|
|
UINT32 Data32;
|
|
} ACPI_LPI_STATE_FLAGS;
|
|
|
|
///
|
|
/// Low Power Idle (LPI) structure with Native C-state instruction entry trigger descriptor
|
|
///
|
|
typedef struct {
|
|
UINT32 Type; ///< LPI State descriptor Type 0
|
|
UINT32 Length; ///< Length of LPI state Descriptor Structure
|
|
///
|
|
/// Unique LPI state identifier: zero based, monotonically increasing identifier
|
|
///
|
|
UINT16 UniqueId;
|
|
UINT8 Reserved[2]; ///< Must be Zero
|
|
ACPI_LPI_STATE_FLAGS Flags; ///< LPI state flags
|
|
/**
|
|
The LPI entry trigger, matching an existing _CST.Register object, represented as a
|
|
Generic Address Structure. All processors must request this state or deeper to trigger.
|
|
**/
|
|
EFI_ACPI_6_1_GENERIC_ADDRESS_STRUCTURE EntryTrigger;
|
|
UINT32 Residency; ///< Minimum residency or break-even in uSec
|
|
UINT32 Latency; ///< Worst case exit latency in uSec
|
|
/**
|
|
[optional] Residency counter, represented as a Generic Address Structure.
|
|
If not present, Flags[1] bit should be set.
|
|
**/
|
|
EFI_ACPI_6_1_GENERIC_ADDRESS_STRUCTURE ResidencyCounter;
|
|
/**
|
|
[optional] Residency counter frequency in cycles per second. Value 0 indicates that
|
|
counter runs at TSC frequency. Valid only if Residency Counter is present.
|
|
**/
|
|
UINT64 ResidencyCounterFrequency;
|
|
} ACPI_LPI_NATIVE_CSTATE_DESCRIPTOR;
|
|
|
|
#pragma pack()
|
|
|
|
#endif
|