UefiCpuPkg/Include/Library/RegisterCpuFeaturesLib.h - third_party/edk2 - Git at Google

 /** @file
   Register CPU Features Library to register and manage CPU features.

   Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
   which accompanies this distribution.  The full text of the license may be found at
   http://opensource.org/licenses/bsd-license.php

   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

 **/

 #ifndef __REGISTER_CPU_FEATURES_LIB_H__
 #define __REGISTER_CPU_FEATURES_LIB_H__

 #include <AcpiCpuData.h>
 #include <Register/Cpuid.h>
 #include <Protocol/MpService.h>

 ///
 /// Defines used to identify a CPU feature.  The lower 16-bits are used to
 /// identify a unique CPU feature and the value represents a bit number in
 /// a bit mask.  The upper 16-bits are bit mask values that are used as
 /// modifiers of a CPU feature.  When used in a list, the define value
 /// CPU_FEATURE_END is used to terminate a list of CPU feature values.
 /// @{
 #define CPU_FEATURE_AESNI                           0
 #define CPU_FEATURE_TURBO_MODE                      1
 #define CPU_FEATURE_MWAIT                           2
 #define CPU_FEATURE_ACPI                            3
 #define CPU_FEATURE_EIST                            4
 #define CPU_FEATURE_XD                              5
 #define CPU_FEATURE_FASTSTRINGS                     6
 #define CPU_FEATURE_VMX                             7
 #define CPU_FEATURE_SMX                             8
 #define CPU_FEATURE_LMCE                            9
 #define CPU_FEATURE_LOCK_FEATURE_CONTROL_REGISTER   10
 #define CPU_FEATURE_LIMIT_CPUID_MAX_VAL             11
 #define CPU_FEATURE_MCE                             12
 #define CPU_FEATURE_MCA                             13
 #define CPU_FEATURE_MCG_CTL                         14
 #define CPU_FEATURE_PENDING_BREAK                   15
 #define CPU_FEATURE_C1E                             16
 #define CPU_FEATURE_C1_AUTO_DEMOTION                17
 #define CPU_FEATURE_C3_AUTO_DEMOTION                18
 #define CPU_FEATURE_C1_UNDEMOTION                   19
 #define CPU_FEATURE_C3_UNDEMOTION                   20
 #define CPU_FEATURE_C_STATE                         21
 #define CPU_FEATURE_TM                              22
 #define CPU_FEATURE_TM2                             23
 #define CPU_FEATURE_X2APIC                          24
 #define CPU_FEATURE_RESERVED_25                     25
 #define CPU_FEATURE_RESERVED_26                     26
 #define CPU_FEATURE_RESERVED_27                     27
 #define CPU_FEATURE_RESERVED_28                     28
 #define CPU_FEATURE_RESERVED_29                     29
 #define CPU_FEATURE_RESERVED_30                     30
 #define CPU_FEATURE_RESERVED_31                     31

 #define CPU_FEATURE_L2_PREFETCHER                   (32+0)
 #define CPU_FEATURE_L1_DATA_PREFETCHER              (32+1)
 #define CPU_FEATURE_HARDWARE_PREFETCHER             (32+2)
 #define CPU_FEATURE_ADJACENT_CACHE_LINE_PREFETCH    (32+3)
 #define CPU_FEATURE_DCU_PREFETCHER                  (32+4)
 #define CPU_FEATURE_IP_PREFETCHER                   (32+5)
 #define CPU_FEATURE_MLC_STREAMER_PREFETCHER         (32+6)
 #define CPU_FEATURE_MLC_SPATIAL_PREFETCHER          (32+7)
 #define CPU_FEATURE_THREE_STRICK_COUNTER            (32+8)
 #define CPU_FEATURE_APIC_TPR_UPDATE_MESSAGE         (32+9)
 #define CPU_FEATURE_ENERGY_PERFORMANCE_BIAS         (32+10)
 #define CPU_FEATURE_PPIN                            (32+11)
 #define CPU_FEATURE_PROC_TRACE                      (32+12)

 #define CPU_FEATURE_BEFORE_ALL                      BIT27
 #define CPU_FEATURE_AFTER_ALL                       BIT28
 #define CPU_FEATURE_BEFORE                          BIT29
 #define CPU_FEATURE_AFTER                           BIT30
 #define CPU_FEATURE_END                             MAX_UINT32
 /// @}

 ///
 /// CPU Information passed into the SupportFunc and InitializeFunc of the
 /// RegisterCpuFeature() library function.  This structure contains information
 /// that is commonly used during CPU feature detection and initialization.
 ///
 typedef struct {
   ///
   /// The package that the CPU resides
   ///
   EFI_PROCESSOR_INFORMATION            ProcessorInfo;
   ///
   /// The Display Family of the CPU computed from CPUID leaf CPUID_VERSION_INFO
   ///
   UINT32                               DisplayFamily;
   ///
   /// The Display Model of the CPU computed from CPUID leaf CPUID_VERSION_INFO
   ///
   UINT32                               DisplayModel;
   ///
   /// The Stepping ID of the CPU computed from CPUID leaf CPUID_VERSION_INFO
   ///
   UINT32                               SteppingId;
   ///
   /// The Processor Type of the CPU computed from CPUID leaf CPUID_VERSION_INFO
   ///
   UINT32                               ProcessorType;
   ///
   /// Bit field structured returned in ECX from CPUID leaf CPUID_VERSION_INFO
   ///
   CPUID_VERSION_INFO_ECX               CpuIdVersionInfoEcx;
   ///
   /// Bit field structured returned in EDX from CPUID leaf CPUID_VERSION_INFO
   ///
   CPUID_VERSION_INFO_EDX               CpuIdVersionInfoEdx;
 } REGISTER_CPU_FEATURE_INFORMATION;

 /**
   Determines if a CPU feature is enabled in PcdCpuFeaturesSupport bit mask.
   If a CPU feature is disabled in PcdCpuFeaturesSupport then all the code/data
   associated with that feature should be optimized away if compiler
   optimizations are enabled.

   @param[in]  Feature  The bit number of the CPU feature to check in the PCD
                        PcdCpuFeaturesSupport.

   @retval  TRUE   The CPU feature is set in PcdCpuFeaturesSupport.
   @retval  FALSE  The CPU feature is not set in PcdCpuFeaturesSupport.

   @note This service could be called by BSP only.
 **/
 BOOLEAN
 EFIAPI
 IsCpuFeatureSupported (
   IN UINT32              Feature
   );

 /**
   Determines if a CPU feature is set in PcdCpuFeaturesSetting bit mask.

   @param[in]  Feature  The bit number of the CPU feature to check in the PCD
                        PcdCpuFeaturesSetting.

   @retval  TRUE   The CPU feature is set in PcdCpuFeaturesSetting.
   @retval  FALSE  The CPU feature is not set in PcdCpuFeaturesSetting.

   @note This service could be called by BSP only.
 **/
 BOOLEAN
 EFIAPI
 IsCpuFeatureInSetting (
   IN UINT32              Feature
   );

 /**
   Determines if a CPU feature is set in PcdCpuFeaturesCapability bit mask.

   @param[in]  Feature  The bit number of the CPU feature to check in the PCD
                        PcdCpuFeaturesCapability.

   @retval  TRUE   The CPU feature is set in PcdCpuFeaturesCapability.
   @retval  FALSE  The CPU feature is not set in PcdCpuFeaturesCapability.

   @note This service could be called by BSP only.
 **/
 BOOLEAN
 EFIAPI
 IsCpuFeatureCapability (
   IN UINT32              Feature
   );

 /**
   Determines if a CPU feature is set in PcdCpuFeaturesUserConfiguration bit mask.

   @param[in]  Feature  The bit number of the CPU feature to check in the PCD
                        PcdCpuFeaturesUserConfiguration.

   @retval  TRUE   The CPU feature is set in PcdCpuFeaturesUserConfiguration.
   @retval  FALSE  The CPU feature is not set in PcdCpuFeaturesUserConfiguration.

   @note This service could be called by BSP only.
 **/
 BOOLEAN
 EFIAPI
 IsCpuFeatureUserConfiguration (
   IN UINT32              Feature
   );

 /**
   Prepares for the data used by CPU feature detection and initialization.

   @param[in]  NumberOfProcessors  The number of CPUs in the platform.

   @return  Pointer to a buffer of CPU related configuration data.

   @note This service could be called by BSP only.
 **/
 typedef
 VOID *
 (EFIAPI *CPU_FEATURE_GET_CONFIG_DATA)(
   IN UINTN               NumberOfProcessors
   );

 /**
   Detects if CPU feature supported on current processor.

   @param[in]  ProcessorNumber  The index of the CPU executing this function.
   @param[in]  CpuInfo          A pointer to the REGISTER_CPU_FEATURE_INFORMATION
                                structure for the CPU executing this function.
   @param[in]  ConfigData       A pointer to the configuration buffer returned
                                by CPU_FEATURE_GET_CONFIG_DATA.  NULL if
                                CPU_FEATURE_GET_CONFIG_DATA was not provided in
                                RegisterCpuFeature().

   @retval TRUE     CPU feature is supported.
   @retval FALSE    CPU feature is not supported.

   @note This service could be called by BSP/APs.
 **/
 typedef
 BOOLEAN
 (EFIAPI *CPU_FEATURE_SUPPORT)(
   IN UINTN                             ProcessorNumber,
   IN REGISTER_CPU_FEATURE_INFORMATION  *CpuInfo,
   IN VOID                              *ConfigData  OPTIONAL
   );

 /**
   Initializes CPU feature to specific state.

   This service does not initialize hardware and only produces entries in the
   Register Table for specified processor. Hardware initialization on BSP/APs
   will be done in CpuFeaturesInitialize().

   @param[in]  ProcessorNumber  The index of the CPU executing this function.
   @param[in]  CpuInfo          A pointer to the REGISTER_CPU_FEATURE_INFORMATION
                                structure for the CPU executing this function.
   @param[in]  ConfigData       A pointer to the configuration buffer returned
                                by CPU_FEATURE_GET_CONFIG_DATA.  NULL if
                                CPU_FEATURE_GET_CONFIG_DATA was not provided in
                                RegisterCpuFeature().
   @param[in]  State            If TRUE, then the CPU feature must be enabled.
                                If FALSE, then the CPU feature must be disabled.

   @retval RETURN_SUCCESS       CPU feature is initialized.

   @note This service could be called by BSP only.
 **/
 typedef
 RETURN_STATUS
 (EFIAPI *CPU_FEATURE_INITIALIZE)(
   IN UINTN                             ProcessorNumber,
   IN REGISTER_CPU_FEATURE_INFORMATION  *CpuInfo,
   IN VOID                              *ConfigData,  OPTIONAL
   IN BOOLEAN                           State
   );

 /**
   Registers a CPU Feature.

   @param[in]  FeatureName        A Null-terminated Ascii string indicates CPU feature
                                  name.
   @param[in]  GetConfigDataFunc  CPU feature get configuration data function.  This
                                  is an optional parameter that may be NULL.  If NULL,
                                  then the most recently registered function for the
                                  CPU feature is used.  If no functions are registered
                                  for a CPU feature, then the CPU configuration data
                                  for the registered feature is NULL.
   @param[in]  SupportFunc        CPU feature support function.  This is an optional
                                  parameter that may be NULL.  If NULL, then the most
                                  recently registered function for the CPU feature is
                                  used. If no functions are registered for a CPU
                                  feature, then the CPU feature is assumed to be
                                  supported by all CPUs.
   @param[in]  InitializeFunc     CPU feature initialize function.  This is an optional
                                  parameter that may be NULL.  If NULL, then the most
                                  recently registered function for the CPU feature is
                                  used. If no functions are registered for a CPU
                                  feature, then the CPU feature initialization is
                                  skipped.
   @param[in]  ...                Variable argument list of UINT32 CPU feature value.
                                  Values with no modifiers are the features provided
                                  by the registered functions.
                                  Values with CPU_FEATURE_BEFORE modifier are features
                                  that must be initialized after the features provided
                                  by the registered functions are used.
                                  Values with CPU_FEATURE_AFTER modifier are features
                                  that must be initialized before the features provided
                                  by the registered functions are used.
                                  The last argument in this variable argument list must
                                  always be CPU_FEATURE_END.

   @retval  RETURN_SUCCESS           The CPU feature was successfully registered.
   @retval  RETURN_OUT_OF_RESOURCES  There are not enough resources to register
                                     the CPU feature.
   @retval  RETURN_UNSUPPORTED       Registration of the CPU feature is not
                                     supported due to a circular dependency between
                                     BEFORE and AFTER features.

   @note This service could be called by BSP only.
 **/
 RETURN_STATUS
 EFIAPI
 RegisterCpuFeature (
   IN CHAR8                             *FeatureName,       OPTIONAL
   IN CPU_FEATURE_GET_CONFIG_DATA       GetConfigDataFunc,  OPTIONAL
   IN CPU_FEATURE_SUPPORT               SupportFunc,        OPTIONAL
   IN CPU_FEATURE_INITIALIZE            InitializeFunc,     OPTIONAL
   ...
   );

 /**
   Performs CPU features detection.

   This service will invoke MP service to check CPU features'
   capabilities on BSP/APs.

   @note This service could be called by BSP only.
 **/
 VOID
 EFIAPI
 CpuFeaturesDetect (
   VOID
   );

 /**
   Performs CPU features Initialization.

   This service will invoke MP service to perform CPU features
   initialization on BSP/APs per user configuration.

   @note This service could be called by BSP only.
 **/
 VOID
 EFIAPI
 CpuFeaturesInitialize (
   VOID
   );

 /**
   Switches to assigned BSP after CPU features initialization.

   @param[in]  ProcessorNumber  The index of the CPU executing this function.

   @note This service could be called by BSP only.
 **/
 VOID
 EFIAPI
 SwitchBspAfterFeaturesInitialize (
   IN UINTN               ProcessorNumber
   );

 /**
   Adds an entry in specified register table.

   This function adds an entry in specified register table, with given register type,
   register index, bit section and value.

   @param[in]  ProcessorNumber  The index of the CPU to add a register table entry.
   @param[in]  RegisterType     Type of the register to program
   @param[in]  Index            Index of the register to program
   @param[in]  ValueMask        Mask of bits in register to write
   @param[in]  Value            Value to write

   @note This service could be called by BSP only.
 **/
 VOID
 EFIAPI
 CpuRegisterTableWrite (
   IN UINTN               ProcessorNumber,
   IN REGISTER_TYPE       RegisterType,
   IN UINT64              Index,
   IN UINT64              ValueMask,
   IN UINT64              Value
   );

 /**
   Adds an entry in specified Pre-SMM register table.

   This function adds an entry in specified register table, with given register type,
   register index, bit section and value.

   @param[in]  ProcessorNumber  The index of the CPU to add a register table entry.
   @param[in]  RegisterType     Type of the register to program
   @param[in]  Index            Index of the register to program
   @param[in]  ValueMask        Mask of bits in register to write
   @param[in]  Value            Value to write

   @note This service could be called by BSP only.
 **/
 VOID
 EFIAPI
 PreSmmCpuRegisterTableWrite (
   IN UINTN               ProcessorNumber,
   IN REGISTER_TYPE       RegisterType,
   IN UINT64              Index,
   IN UINT64              ValueMask,
   IN UINT64              Value
   );

 /**
   Adds a 32-bit register write entry in specified register table.

   This macro adds an entry in specified register table, with given register type,
   register index, and value.

   @param[in]  ProcessorNumber  The index of the CPU to add a register table entry.
   @param[in]  RegisterType     Type of the register to program
   @param[in]  Index            Index of the register to program
   @param[in]  Value            Value to write

   @note This service could be called by BSP only.
 **/
 #define CPU_REGISTER_TABLE_WRITE32(ProcessorNumber, RegisterType, Index, Value)       \
   do {                                                                                \
     CpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, MAX_UINT32, Value);  \
   } while(FALSE);

 /**
   Adds a 64-bit register write entry in specified register table.

   This macro adds an entry in specified register table, with given register type,
   register index, and value.

   @param[in]  ProcessorNumber  The index of the CPU to add a register table entry.
   @param[in]  RegisterType     Type of the register to program
   @param[in]  Index            Index of the register to program
   @param[in]  Value            Value to write

   @note This service could be called by BSP only.
 **/
 #define CPU_REGISTER_TABLE_WRITE64(ProcessorNumber, RegisterType, Index, Value)       \
   do {                                                                                \
     CpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, MAX_UINT64, Value);  \
   } while(FALSE);

 /**
   Adds a bit field write entry in specified register table.

   This macro adds an entry in specified register table, with given register type,
   register index, bit field section, and value.

   @param[in]  ProcessorNumber  The index of the CPU to add a register table entry.
   @param[in]  RegisterType     Type of the register to program.
   @param[in]  Index            Index of the register to program.
   @param[in]  Type             The data type name of a register structure.
   @param[in]  Field            The bit fiel name in register structure to write.
   @param[in]  Value            Value to write to the bit field.

   @note This service could be called by BSP only.
 **/
 #define CPU_REGISTER_TABLE_WRITE_FIELD(ProcessorNumber, RegisterType, Index, Type, Field, Value) \
   do {                                                                                           \
     UINT64  ValueMask;                                                                           \
     ValueMask = MAX_UINT64;                                                                      \
     ((Type *)(&ValueMask))->Field = 0;                                                           \
     CpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, ~ValueMask, Value);             \
   } while(FALSE);

 /**
   Adds a 32-bit register write entry in specified register table.

   This macro adds an entry in specified register table, with given register type,
   register index, and value.

   @param[in]  ProcessorNumber  The index of the CPU to add a register table entry.
   @param[in]  RegisterType     Type of the register to program
   @param[in]  Index            Index of the register to program
   @param[in]  Value            Value to write

   @note This service could be called by BSP only.
 **/
 #define PRE_SMM_CPU_REGISTER_TABLE_WRITE32(ProcessorNumber, RegisterType, Index, Value)    \
   do {                                                                                     \
     PreSmmCpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, MAX_UINT32, Value); \
   } while(FALSE);

 /**
   Adds a 64-bit register write entry in specified register table.

   This macro adds an entry in specified register table, with given register type,
   register index, and value.

   @param[in]  ProcessorNumber  The index of the CPU to add a register table entry.
   @param[in]  RegisterType     Type of the register to program
   @param[in]  Index            Index of the register to program
   @param[in]  Value            Value to write

   @note This service could be called by BSP only.
 **/
 #define PRE_SMM_CPU_REGISTER_TABLE_WRITE64(ProcessorNumber, RegisterType, Index, Value)    \
   do {                                                                                     \
     PreSmmCpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, MAX_UINT64, Value); \
   } while(FALSE);

 /**
   Adds a bit field write entry in specified register table.

   This macro adds an entry in specified register table, with given register type,
   register index, bit field section, and value.

   @param[in]  ProcessorNumber  The index of the CPU to add a register table entry.
   @param[in]  RegisterType     Type of the register to program.
   @param[in]  Index            Index of the register to program.
   @param[in]  Type             The data type name of a register structure.
   @param[in]  Field            The bit fiel name in register structure to write.
   @param[in]  Value            Value to write to the bit field.

   @note This service could be called by BSP only.
 **/
 #define PRE_SMM_CPU_REGISTER_TABLE_WRITE_FIELD(ProcessorNumber, RegisterType, Index, Type, Field, Value) \
   do {                                                                                                   \
     UINT64  ValueMask;                                                                                   \
     ValueMask = MAX_UINT64;                                                                              \
     ((Type *)(&ValueMask))->Field = 0;                                                                   \
     PreSmmCpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, ~ValueMask, Value);                \
   } while(FALSE);

 #endif
	/** @file
	Register CPU Features Library to register and manage CPU features.

	Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
	This program and the accompanying materials
	are licensed and made available under the terms and conditions of the BSD License
	which accompanies this distribution. The full text of the license may be found at
	http://opensource.org/licenses/bsd-license.php

	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

	**/

	#ifndef __REGISTER_CPU_FEATURES_LIB_H__
	#define __REGISTER_CPU_FEATURES_LIB_H__

	#include <AcpiCpuData.h>
	#include <Register/Cpuid.h>
	#include <Protocol/MpService.h>

	///
	/// Defines used to identify a CPU feature. The lower 16-bits are used to
	/// identify a unique CPU feature and the value represents a bit number in
	/// a bit mask. The upper 16-bits are bit mask values that are used as
	/// modifiers of a CPU feature. When used in a list, the define value
	/// CPU_FEATURE_END is used to terminate a list of CPU feature values.
	/// @{
	#define CPU_FEATURE_AESNI 0
	#define CPU_FEATURE_TURBO_MODE 1
	#define CPU_FEATURE_MWAIT 2
	#define CPU_FEATURE_ACPI 3
	#define CPU_FEATURE_EIST 4
	#define CPU_FEATURE_XD 5
	#define CPU_FEATURE_FASTSTRINGS 6
	#define CPU_FEATURE_VMX 7
	#define CPU_FEATURE_SMX 8
	#define CPU_FEATURE_LMCE 9
	#define CPU_FEATURE_LOCK_FEATURE_CONTROL_REGISTER 10
	#define CPU_FEATURE_LIMIT_CPUID_MAX_VAL 11
	#define CPU_FEATURE_MCE 12
	#define CPU_FEATURE_MCA 13
	#define CPU_FEATURE_MCG_CTL 14
	#define CPU_FEATURE_PENDING_BREAK 15
	#define CPU_FEATURE_C1E 16
	#define CPU_FEATURE_C1_AUTO_DEMOTION 17
	#define CPU_FEATURE_C3_AUTO_DEMOTION 18
	#define CPU_FEATURE_C1_UNDEMOTION 19
	#define CPU_FEATURE_C3_UNDEMOTION 20
	#define CPU_FEATURE_C_STATE 21
	#define CPU_FEATURE_TM 22
	#define CPU_FEATURE_TM2 23
	#define CPU_FEATURE_X2APIC 24
	#define CPU_FEATURE_RESERVED_25 25
	#define CPU_FEATURE_RESERVED_26 26
	#define CPU_FEATURE_RESERVED_27 27
	#define CPU_FEATURE_RESERVED_28 28
	#define CPU_FEATURE_RESERVED_29 29
	#define CPU_FEATURE_RESERVED_30 30
	#define CPU_FEATURE_RESERVED_31 31

	#define CPU_FEATURE_L2_PREFETCHER (32+0)
	#define CPU_FEATURE_L1_DATA_PREFETCHER (32+1)
	#define CPU_FEATURE_HARDWARE_PREFETCHER (32+2)
	#define CPU_FEATURE_ADJACENT_CACHE_LINE_PREFETCH (32+3)
	#define CPU_FEATURE_DCU_PREFETCHER (32+4)
	#define CPU_FEATURE_IP_PREFETCHER (32+5)
	#define CPU_FEATURE_MLC_STREAMER_PREFETCHER (32+6)
	#define CPU_FEATURE_MLC_SPATIAL_PREFETCHER (32+7)
	#define CPU_FEATURE_THREE_STRICK_COUNTER (32+8)
	#define CPU_FEATURE_APIC_TPR_UPDATE_MESSAGE (32+9)
	#define CPU_FEATURE_ENERGY_PERFORMANCE_BIAS (32+10)
	#define CPU_FEATURE_PPIN (32+11)
	#define CPU_FEATURE_PROC_TRACE (32+12)

	#define CPU_FEATURE_BEFORE_ALL BIT27
	#define CPU_FEATURE_AFTER_ALL BIT28
	#define CPU_FEATURE_BEFORE BIT29
	#define CPU_FEATURE_AFTER BIT30
	#define CPU_FEATURE_END MAX_UINT32
	/// @}

	///
	/// CPU Information passed into the SupportFunc and InitializeFunc of the
	/// RegisterCpuFeature() library function. This structure contains information
	/// that is commonly used during CPU feature detection and initialization.
	///
	typedef struct {
	///
	/// The package that the CPU resides
	///
	EFI_PROCESSOR_INFORMATION ProcessorInfo;
	///
	/// The Display Family of the CPU computed from CPUID leaf CPUID_VERSION_INFO
	///
	UINT32 DisplayFamily;
	///
	/// The Display Model of the CPU computed from CPUID leaf CPUID_VERSION_INFO
	///
	UINT32 DisplayModel;
	///
	/// The Stepping ID of the CPU computed from CPUID leaf CPUID_VERSION_INFO
	///
	UINT32 SteppingId;
	///
	/// The Processor Type of the CPU computed from CPUID leaf CPUID_VERSION_INFO
	///
	UINT32 ProcessorType;
	///
	/// Bit field structured returned in ECX from CPUID leaf CPUID_VERSION_INFO
	///
	CPUID_VERSION_INFO_ECX CpuIdVersionInfoEcx;
	///
	/// Bit field structured returned in EDX from CPUID leaf CPUID_VERSION_INFO
	///
	CPUID_VERSION_INFO_EDX CpuIdVersionInfoEdx;
	} REGISTER_CPU_FEATURE_INFORMATION;

	/**
	Determines if a CPU feature is enabled in PcdCpuFeaturesSupport bit mask.
	If a CPU feature is disabled in PcdCpuFeaturesSupport then all the code/data
	associated with that feature should be optimized away if compiler
	optimizations are enabled.

	@param[in] Feature The bit number of the CPU feature to check in the PCD
	PcdCpuFeaturesSupport.

	@retval TRUE The CPU feature is set in PcdCpuFeaturesSupport.
	@retval FALSE The CPU feature is not set in PcdCpuFeaturesSupport.

	@note This service could be called by BSP only.
	**/
	BOOLEAN
	EFIAPI
	IsCpuFeatureSupported (
	IN UINT32 Feature
	);

	/**
	Determines if a CPU feature is set in PcdCpuFeaturesSetting bit mask.

	@param[in] Feature The bit number of the CPU feature to check in the PCD
	PcdCpuFeaturesSetting.

	@retval TRUE The CPU feature is set in PcdCpuFeaturesSetting.
	@retval FALSE The CPU feature is not set in PcdCpuFeaturesSetting.

	@note This service could be called by BSP only.
	**/
	BOOLEAN
	EFIAPI
	IsCpuFeatureInSetting (
	IN UINT32 Feature
	);

	/**
	Determines if a CPU feature is set in PcdCpuFeaturesCapability bit mask.

	@param[in] Feature The bit number of the CPU feature to check in the PCD
	PcdCpuFeaturesCapability.

	@retval TRUE The CPU feature is set in PcdCpuFeaturesCapability.
	@retval FALSE The CPU feature is not set in PcdCpuFeaturesCapability.

	@note This service could be called by BSP only.
	**/
	BOOLEAN
	EFIAPI
	IsCpuFeatureCapability (
	IN UINT32 Feature
	);

	/**
	Determines if a CPU feature is set in PcdCpuFeaturesUserConfiguration bit mask.

	@param[in] Feature The bit number of the CPU feature to check in the PCD
	PcdCpuFeaturesUserConfiguration.

	@retval TRUE The CPU feature is set in PcdCpuFeaturesUserConfiguration.
	@retval FALSE The CPU feature is not set in PcdCpuFeaturesUserConfiguration.

	@note This service could be called by BSP only.
	**/
	BOOLEAN
	EFIAPI
	IsCpuFeatureUserConfiguration (
	IN UINT32 Feature
	);

	/**
	Prepares for the data used by CPU feature detection and initialization.

	@param[in] NumberOfProcessors The number of CPUs in the platform.

	@return Pointer to a buffer of CPU related configuration data.

	@note This service could be called by BSP only.
	**/
	typedef
	VOID *
	(EFIAPI *CPU_FEATURE_GET_CONFIG_DATA)(
	IN UINTN NumberOfProcessors
	);

	/**
	Detects if CPU feature supported on current processor.

	@param[in] ProcessorNumber The index of the CPU executing this function.
	@param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION
	structure for the CPU executing this function.
	@param[in] ConfigData A pointer to the configuration buffer returned
	by CPU_FEATURE_GET_CONFIG_DATA. NULL if
	CPU_FEATURE_GET_CONFIG_DATA was not provided in
	RegisterCpuFeature().

	@retval TRUE CPU feature is supported.
	@retval FALSE CPU feature is not supported.

	@note This service could be called by BSP/APs.
	**/
	typedef
	BOOLEAN
	(EFIAPI *CPU_FEATURE_SUPPORT)(
	IN UINTN ProcessorNumber,
	IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
	IN VOID *ConfigData OPTIONAL
	);

	/**
	Initializes CPU feature to specific state.

	This service does not initialize hardware and only produces entries in the
	Register Table for specified processor. Hardware initialization on BSP/APs
	will be done in CpuFeaturesInitialize().

	@param[in] ProcessorNumber The index of the CPU executing this function.
	@param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION
	structure for the CPU executing this function.
	@param[in] ConfigData A pointer to the configuration buffer returned
	by CPU_FEATURE_GET_CONFIG_DATA. NULL if
	CPU_FEATURE_GET_CONFIG_DATA was not provided in
	RegisterCpuFeature().
	@param[in] State If TRUE, then the CPU feature must be enabled.
	If FALSE, then the CPU feature must be disabled.

	@retval RETURN_SUCCESS CPU feature is initialized.

	@note This service could be called by BSP only.
	**/
	typedef
	RETURN_STATUS
	(EFIAPI *CPU_FEATURE_INITIALIZE)(
	IN UINTN ProcessorNumber,
	IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
	IN VOID *ConfigData, OPTIONAL
	IN BOOLEAN State
	);

	/**
	Registers a CPU Feature.

	@param[in] FeatureName A Null-terminated Ascii string indicates CPU feature
	name.
	@param[in] GetConfigDataFunc CPU feature get configuration data function. This
	is an optional parameter that may be NULL. If NULL,
	then the most recently registered function for the
	CPU feature is used. If no functions are registered
	for a CPU feature, then the CPU configuration data
	for the registered feature is NULL.
	@param[in] SupportFunc CPU feature support function. This is an optional
	parameter that may be NULL. If NULL, then the most
	recently registered function for the CPU feature is
	used. If no functions are registered for a CPU
	feature, then the CPU feature is assumed to be
	supported by all CPUs.
	@param[in] InitializeFunc CPU feature initialize function. This is an optional
	parameter that may be NULL. If NULL, then the most
	recently registered function for the CPU feature is
	used. If no functions are registered for a CPU
	feature, then the CPU feature initialization is
	skipped.
	@param[in] ... Variable argument list of UINT32 CPU feature value.
	Values with no modifiers are the features provided
	by the registered functions.
	Values with CPU_FEATURE_BEFORE modifier are features
	that must be initialized after the features provided
	by the registered functions are used.
	Values with CPU_FEATURE_AFTER modifier are features
	that must be initialized before the features provided
	by the registered functions are used.
	The last argument in this variable argument list must
	always be CPU_FEATURE_END.

	@retval RETURN_SUCCESS The CPU feature was successfully registered.
	@retval RETURN_OUT_OF_RESOURCES There are not enough resources to register
	the CPU feature.
	@retval RETURN_UNSUPPORTED Registration of the CPU feature is not
	supported due to a circular dependency between
	BEFORE and AFTER features.

	@note This service could be called by BSP only.
	**/
	RETURN_STATUS
	EFIAPI
	RegisterCpuFeature (
	IN CHAR8 *FeatureName, OPTIONAL
	IN CPU_FEATURE_GET_CONFIG_DATA GetConfigDataFunc, OPTIONAL
	IN CPU_FEATURE_SUPPORT SupportFunc, OPTIONAL
	IN CPU_FEATURE_INITIALIZE InitializeFunc, OPTIONAL
	...
	);

	/**
	Performs CPU features detection.

	This service will invoke MP service to check CPU features'
	capabilities on BSP/APs.

	@note This service could be called by BSP only.
	**/
	VOID
	EFIAPI
	CpuFeaturesDetect (
	VOID
	);

	/**
	Performs CPU features Initialization.

	This service will invoke MP service to perform CPU features
	initialization on BSP/APs per user configuration.

	@note This service could be called by BSP only.
	**/
	VOID
	EFIAPI
	CpuFeaturesInitialize (
	VOID
	);

	/**
	Switches to assigned BSP after CPU features initialization.

	@param[in] ProcessorNumber The index of the CPU executing this function.

	@note This service could be called by BSP only.
	**/
	VOID
	EFIAPI
	SwitchBspAfterFeaturesInitialize (
	IN UINTN ProcessorNumber
	);

	/**
	Adds an entry in specified register table.

	This function adds an entry in specified register table, with given register type,
	register index, bit section and value.

	@param[in] ProcessorNumber The index of the CPU to add a register table entry.
	@param[in] RegisterType Type of the register to program
	@param[in] Index Index of the register to program
	@param[in] ValueMask Mask of bits in register to write
	@param[in] Value Value to write

	@note This service could be called by BSP only.
	**/
	VOID
	EFIAPI
	CpuRegisterTableWrite (
	IN UINTN ProcessorNumber,
	IN REGISTER_TYPE RegisterType,
	IN UINT64 Index,
	IN UINT64 ValueMask,
	IN UINT64 Value
	);

	/**
	Adds an entry in specified Pre-SMM register table.

	This function adds an entry in specified register table, with given register type,
	register index, bit section and value.

	@param[in] ProcessorNumber The index of the CPU to add a register table entry.
	@param[in] RegisterType Type of the register to program
	@param[in] Index Index of the register to program
	@param[in] ValueMask Mask of bits in register to write
	@param[in] Value Value to write

	@note This service could be called by BSP only.
	**/
	VOID
	EFIAPI
	PreSmmCpuRegisterTableWrite (
	IN UINTN ProcessorNumber,
	IN REGISTER_TYPE RegisterType,
	IN UINT64 Index,
	IN UINT64 ValueMask,
	IN UINT64 Value
	);

	/**
	Adds a 32-bit register write entry in specified register table.

	This macro adds an entry in specified register table, with given register type,
	register index, and value.

	@param[in] ProcessorNumber The index of the CPU to add a register table entry.
	@param[in] RegisterType Type of the register to program
	@param[in] Index Index of the register to program
	@param[in] Value Value to write

	@note This service could be called by BSP only.
	**/
	#define CPU_REGISTER_TABLE_WRITE32(ProcessorNumber, RegisterType, Index, Value) \
	do { \
	CpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, MAX_UINT32, Value); \
	} while(FALSE);

	/**
	Adds a 64-bit register write entry in specified register table.

	This macro adds an entry in specified register table, with given register type,
	register index, and value.

	@param[in] ProcessorNumber The index of the CPU to add a register table entry.
	@param[in] RegisterType Type of the register to program
	@param[in] Index Index of the register to program
	@param[in] Value Value to write

	@note This service could be called by BSP only.
	**/
	#define CPU_REGISTER_TABLE_WRITE64(ProcessorNumber, RegisterType, Index, Value) \
	do { \
	CpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, MAX_UINT64, Value); \
	} while(FALSE);

	/**
	Adds a bit field write entry in specified register table.

	This macro adds an entry in specified register table, with given register type,
	register index, bit field section, and value.

	@param[in] ProcessorNumber The index of the CPU to add a register table entry.
	@param[in] RegisterType Type of the register to program.
	@param[in] Index Index of the register to program.
	@param[in] Type The data type name of a register structure.
	@param[in] Field The bit fiel name in register structure to write.
	@param[in] Value Value to write to the bit field.

	@note This service could be called by BSP only.
	**/
	#define CPU_REGISTER_TABLE_WRITE_FIELD(ProcessorNumber, RegisterType, Index, Type, Field, Value) \
	do { \
	UINT64 ValueMask; \
	ValueMask = MAX_UINT64; \
	((Type *)(&ValueMask))->Field = 0; \
	CpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, ~ValueMask, Value); \
	} while(FALSE);

	/**
	Adds a 32-bit register write entry in specified register table.

	This macro adds an entry in specified register table, with given register type,
	register index, and value.

	@param[in] ProcessorNumber The index of the CPU to add a register table entry.
	@param[in] RegisterType Type of the register to program
	@param[in] Index Index of the register to program
	@param[in] Value Value to write

	@note This service could be called by BSP only.
	**/
	#define PRE_SMM_CPU_REGISTER_TABLE_WRITE32(ProcessorNumber, RegisterType, Index, Value) \
	do { \
	PreSmmCpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, MAX_UINT32, Value); \
	} while(FALSE);

	/**
	Adds a 64-bit register write entry in specified register table.

	This macro adds an entry in specified register table, with given register type,
	register index, and value.

	@param[in] ProcessorNumber The index of the CPU to add a register table entry.
	@param[in] RegisterType Type of the register to program
	@param[in] Index Index of the register to program
	@param[in] Value Value to write

	@note This service could be called by BSP only.
	**/
	#define PRE_SMM_CPU_REGISTER_TABLE_WRITE64(ProcessorNumber, RegisterType, Index, Value) \
	do { \
	PreSmmCpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, MAX_UINT64, Value); \
	} while(FALSE);

	/**
	Adds a bit field write entry in specified register table.

	This macro adds an entry in specified register table, with given register type,
	register index, bit field section, and value.

	@param[in] ProcessorNumber The index of the CPU to add a register table entry.
	@param[in] RegisterType Type of the register to program.
	@param[in] Index Index of the register to program.
	@param[in] Type The data type name of a register structure.
	@param[in] Field The bit fiel name in register structure to write.
	@param[in] Value Value to write to the bit field.

	@note This service could be called by BSP only.
	**/
	#define PRE_SMM_CPU_REGISTER_TABLE_WRITE_FIELD(ProcessorNumber, RegisterType, Index, Type, Field, Value) \
	do { \
	UINT64 ValueMask; \
	ValueMask = MAX_UINT64; \
	((Type *)(&ValueMask))->Field = 0; \
	PreSmmCpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, ~ValueMask, Value); \
	} while(FALSE);

	#endif