Vlv2TbltDevicePkg/Include/Protocol/EnhancedSpeedstep.h

   1 /*++
   2
   3   Copyright (c) 2004  - 2014, Intel Corporation. All rights reserved.<BR>
   4
   5   This program and the accompanying materials are licensed and made available under
   6   the terms and conditions of the BSD License that accompanies this distribution.
   7   The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php.
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13
  14
  15
  16 Module Name:
  17
  18   EnhancedSpeedstep.h
  19
  20 Abstract:
  21
  22   Enhanced Speedstep protocol
  23
  24   The Enhanced Speedstep Protocol support.
  25
  26 **/
  27
  28 #ifndef _ENHANCED_SPEEDSTEP_H_
  29 #define _ENHANCED_SPEEDSTEP_H_
  30
  31 #define ENHANCED_SPEEDSTEP_PROTOCOL_GUID \
  32   { \
  33     0x91a1ddcf, 0x5374, 0x4939, 0x89, 0x51, 0xd7, 0x29, 0x3f, 0x1a, 0x78, 0x6f \
  34   }
  35
  36 typedef struct _ENHANCED_SPEEDSTEP_PROTOCOL ENHANCED_SPEEDSTEP_PROTOCOL;
  37
  38 typedef struct {
  39   UINT8   Version;      // EIST State format
  40   UINT8   Size;         // Size of element
  41   UINT32  RatioStep;    // Step
  42   UINT32  MinRatio;     // Calculated min ratio
  43   UINT32  MaxRatio;     // Calculated max ratio
  44   UINT32  MinCoreFreq;  // Calculated min freq
  45   UINT32  MaxCoreFreq;  // Calculated max freq
  46   UINT32  MinPower;     // Calculated min power
  47   UINT32  MaxPower;     // Calculated max power
  48   UINT32  NumStates;    // Number of states
  49 } EIST_INFORMATION;
  50
  51 typedef struct {
  52   UINT32  CoreFrequency;
  53   UINT32  Power;
  54   UINT32  TransitionLatency;
  55   UINT32  BusMasterLatency;
  56   UINT32  Control;
  57   UINT32  Status;
  58 } EFI_ACPI_CPU_PSS_STATE;
  59
  60 typedef
  61 EFI_STATUS
  62 (EFIAPI *GET_EIST_TABLE) (
  63   IN    ENHANCED_SPEEDSTEP_PROTOCOL    *This,
  64   OUT   EIST_INFORMATION               **EistInformation,
  65   OUT   VOID                           **PssStates
  66   );
  67
  68 struct _ENHANCED_SPEEDSTEP_PROTOCOL {
  69   UINT32              ProcApicId;
  70   GET_EIST_TABLE      GetEistTable;
  71 };
  72
  73 //
  74 // There will be an instance of this protocol for every processor
  75 // in the system.  ProcNumber is used to manage all the different
  76 // processors in the system and passed into the MP protocol
  77 // to run code streams on application processors
  78 //
  79 extern EFI_GUID gEnhancedSpeedstepProtocolGuid;
  80
  81 #endif