Vlv2TbltDevicePkg/Include/Protocol/EnhancedSpeedstep.h

   1 /*++
   2
   3   Copyright (c) 2004  - 2014, Intel Corporation. All rights reserved.<BR>
   4
   5   SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7
   8
   9
  10
  11 Module Name:
  12
  13   EnhancedSpeedstep.h
  14
  15 Abstract:
  16
  17   Enhanced Speedstep protocol
  18
  19   The Enhanced Speedstep Protocol support.
  20
  21 **/
  22
  23 #ifndef _ENHANCED_SPEEDSTEP_H_
  24 #define _ENHANCED_SPEEDSTEP_H_
  25
  26 #define ENHANCED_SPEEDSTEP_PROTOCOL_GUID \
  27   { \
  28     0x91a1ddcf, 0x5374, 0x4939, 0x89, 0x51, 0xd7, 0x29, 0x3f, 0x1a, 0x78, 0x6f \
  29   }
  30
  31 typedef struct _ENHANCED_SPEEDSTEP_PROTOCOL ENHANCED_SPEEDSTEP_PROTOCOL;
  32
  33 typedef struct {
  34   UINT8   Version;      // EIST State format
  35   UINT8   Size;         // Size of element
  36   UINT32  RatioStep;    // Step
  37   UINT32  MinRatio;     // Calculated min ratio
  38   UINT32  MaxRatio;     // Calculated max ratio
  39   UINT32  MinCoreFreq;  // Calculated min freq
  40   UINT32  MaxCoreFreq;  // Calculated max freq
  41   UINT32  MinPower;     // Calculated min power
  42   UINT32  MaxPower;     // Calculated max power
  43   UINT32  NumStates;    // Number of states
  44 } EIST_INFORMATION;
  45
  46 typedef struct {
  47   UINT32  CoreFrequency;
  48   UINT32  Power;
  49   UINT32  TransitionLatency;
  50   UINT32  BusMasterLatency;
  51   UINT32  Control;
  52   UINT32  Status;
  53 } EFI_ACPI_CPU_PSS_STATE;
  54
  55 typedef
  56 EFI_STATUS
  57 (EFIAPI *GET_EIST_TABLE) (
  58   IN    ENHANCED_SPEEDSTEP_PROTOCOL    *This,
  59   OUT   EIST_INFORMATION               **EistInformation,
  60   OUT   VOID                           **PssStates
  61   );
  62
  63 struct _ENHANCED_SPEEDSTEP_PROTOCOL {
  64   UINT32              ProcApicId;
  65   GET_EIST_TABLE      GetEistTable;
  66 };
  67
  68 //
  69 // There will be an instance of this protocol for every processor
  70 // in the system.  ProcNumber is used to manage all the different
  71 // processors in the system and passed into the MP protocol
  72 // to run code streams on application processors
  73 //
  74 extern EFI_GUID gEnhancedSpeedstepProtocolGuid;
  75
  76 #endif