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Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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Module Name:
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EnhancedSpeedstep.h
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Abstract:
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Enhanced Speedstep protocol
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The Enhanced Speedstep Protocol support.
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**/
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#ifndef _ENHANCED_SPEEDSTEP_H_
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#define _ENHANCED_SPEEDSTEP_H_
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#define ENHANCED_SPEEDSTEP_PROTOCOL_GUID \
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{ \
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0x91a1ddcf, 0x5374, 0x4939, 0x89, 0x51, 0xd7, 0x29, 0x3f, 0x1a, 0x78, 0x6f \
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}
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typedef struct _ENHANCED_SPEEDSTEP_PROTOCOL ENHANCED_SPEEDSTEP_PROTOCOL;
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typedef struct {
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UINT8 Version; // EIST State format
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UINT8 Size; // Size of element
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UINT32 RatioStep; // Step
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UINT32 MinRatio; // Calculated min ratio
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UINT32 MaxRatio; // Calculated max ratio
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UINT32 MinCoreFreq; // Calculated min freq
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UINT32 MaxCoreFreq; // Calculated max freq
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UINT32 MinPower; // Calculated min power
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UINT32 MaxPower; // Calculated max power
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UINT32 NumStates; // Number of states
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} EIST_INFORMATION;
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typedef struct {
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UINT32 CoreFrequency;
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UINT32 Power;
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UINT32 TransitionLatency;
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UINT32 BusMasterLatency;
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UINT32 Control;
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UINT32 Status;
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} EFI_ACPI_CPU_PSS_STATE;
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typedef
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EFI_STATUS
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(EFIAPI *GET_EIST_TABLE) (
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IN ENHANCED_SPEEDSTEP_PROTOCOL *This,
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OUT EIST_INFORMATION **EistInformation,
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OUT VOID **PssStates
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);
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struct _ENHANCED_SPEEDSTEP_PROTOCOL {
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UINT32 ProcApicId;
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GET_EIST_TABLE GetEistTable;
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};
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//
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// There will be an instance of this protocol for every processor
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// in the system. ProcNumber is used to manage all the different
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// processors in the system and passed into the MP protocol
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// to run code streams on application processors
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//
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extern EFI_GUID gEnhancedSpeedstepProtocolGuid;
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#endif
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