1 /*++
2 
3   Copyright (c) 2004  - 2014, Intel Corporation. All rights reserved.<BR>
4 
5 
6   This program and the accompanying materials are licensed and made available under
7 
8   the terms and conditions of the BSD License that accompanies this distribution.
9 
10   The full text of the license may be found at
11 
12   http://opensource.org/licenses/bsd-license.php.
13 
14 
15 
16   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
17 
18   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
19 
20 
21 
22 
23 
24 
25 Module Name:
26 
27   EnhancedSpeedstep.h
28 
29 Abstract:
30 
31   Enhanced Speedstep protocol
32 
33   The Enhanced Speedstep Protocol support.
34 
35 **/
36 
37 #ifndef _ENHANCED_SPEEDSTEP_H_
38 #define _ENHANCED_SPEEDSTEP_H_
39 
40 #define ENHANCED_SPEEDSTEP_PROTOCOL_GUID \
41   { \
42     0x91a1ddcf, 0x5374, 0x4939, 0x89, 0x51, 0xd7, 0x29, 0x3f, 0x1a, 0x78, 0x6f \
43   }
44 
45 typedef struct _ENHANCED_SPEEDSTEP_PROTOCOL ENHANCED_SPEEDSTEP_PROTOCOL;
46 
47 typedef struct {
48   UINT8   Version;      // EIST State format
49   UINT8   Size;         // Size of element
50   UINT32  RatioStep;    // Step
51   UINT32  MinRatio;     // Calculated min ratio
52   UINT32  MaxRatio;     // Calculated max ratio
53   UINT32  MinCoreFreq;  // Calculated min freq
54   UINT32  MaxCoreFreq;  // Calculated max freq
55   UINT32  MinPower;     // Calculated min power
56   UINT32  MaxPower;     // Calculated max power
57   UINT32  NumStates;    // Number of states
58 } EIST_INFORMATION;
59 
60 typedef struct {
61   UINT32  CoreFrequency;
62   UINT32  Power;
63   UINT32  TransitionLatency;
64   UINT32  BusMasterLatency;
65   UINT32  Control;
66   UINT32  Status;
67 } EFI_ACPI_CPU_PSS_STATE;
68 
69 typedef
70 EFI_STATUS
71 (EFIAPI *GET_EIST_TABLE) (
72   IN    ENHANCED_SPEEDSTEP_PROTOCOL    *This,
73   OUT   EIST_INFORMATION               **EistInformation,
74   OUT   VOID                           **PssStates
75   );
76 
77 struct _ENHANCED_SPEEDSTEP_PROTOCOL {
78   UINT32              ProcApicId;
79   GET_EIST_TABLE      GetEistTable;
80 };
81 
82 //
83 // There will be an instance of this protocol for every processor
84 // in the system.  ProcNumber is used to manage all the different
85 // processors in the system and passed into the MP protocol
86 // to run code streams on application processors
87 //
88 extern EFI_GUID gEnhancedSpeedstepProtocolGuid;
89 
90 #endif
91