-/** @file
- Enhanced Intel SpeedStep feature.
-
- 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.
-
-**/
-
-#include "CpuCommonFeatures.h"
-
-/**
- Detects if Enhanced Intel SpeedStep 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 Enhanced Intel SpeedStep feature is supported.
- @retval FALSE Enhanced Intel SpeedStep feature is not supported.
-
- @note This service could be called by BSP/APs.
-**/
-BOOLEAN
-EFIAPI
-EistSupport (
- IN UINTN ProcessorNumber,
- IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
- IN VOID *ConfigData OPTIONAL
- )
-{
- return (CpuInfo->CpuIdVersionInfoEcx.Bits.EIST == 1);
-}
-
-/**
- Initializes Enhanced Intel SpeedStep feature to specific state.
-
- @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 Enhanced Intel SpeedStep feature
- must be enabled.
- If FALSE, then the Enhanced Intel SpeedStep feature
- must be disabled.
-
- @retval RETURN_SUCCESS Enhanced Intel SpeedStep feature is initialized.
-
- @note This service could be called by BSP only.
-**/
-RETURN_STATUS
-EFIAPI
-EistInitialize (
- IN UINTN ProcessorNumber,
- IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
- IN VOID *ConfigData, OPTIONAL
- IN BOOLEAN State
- )
-{
- CPU_REGISTER_TABLE_WRITE_FIELD (
- ProcessorNumber,
- Msr,
- MSR_IA32_MISC_ENABLE,
- MSR_IA32_MISC_ENABLE_REGISTER,
- Bits.EIST,
- (State) ? 1 : 0
- );
- return RETURN_SUCCESS;
-}
+/** @file\r
+ Enhanced Intel SpeedStep feature.\r
+\r
+ Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>\r
+ This program and the accompanying materials\r
+ are licensed and made available under the terms and conditions of the BSD License\r
+ which accompanies this distribution. The full text of the license may be found at\r
+ http://opensource.org/licenses/bsd-license.php\r
+\r
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+\r
+#include "CpuCommonFeatures.h"\r
+\r
+/**\r
+ Detects if Enhanced Intel SpeedStep feature supported on current processor.\r
+\r
+ @param[in] ProcessorNumber The index of the CPU executing this function.\r
+ @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION\r
+ structure for the CPU executing this function.\r
+ @param[in] ConfigData A pointer to the configuration buffer returned\r
+ by CPU_FEATURE_GET_CONFIG_DATA. NULL if\r
+ CPU_FEATURE_GET_CONFIG_DATA was not provided in\r
+ RegisterCpuFeature().\r
+\r
+ @retval TRUE Enhanced Intel SpeedStep feature is supported.\r
+ @retval FALSE Enhanced Intel SpeedStep feature is not supported.\r
+\r
+ @note This service could be called by BSP/APs.\r
+**/\r
+BOOLEAN\r
+EFIAPI\r
+EistSupport (\r
+ IN UINTN ProcessorNumber,\r
+ IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,\r
+ IN VOID *ConfigData OPTIONAL\r
+ )\r
+{\r
+ return (CpuInfo->CpuIdVersionInfoEcx.Bits.EIST == 1);\r
+}\r
+\r
+/**\r
+ Initializes Enhanced Intel SpeedStep feature to specific state.\r
+\r
+ @param[in] ProcessorNumber The index of the CPU executing this function.\r
+ @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION\r
+ structure for the CPU executing this function.\r
+ @param[in] ConfigData A pointer to the configuration buffer returned\r
+ by CPU_FEATURE_GET_CONFIG_DATA. NULL if\r
+ CPU_FEATURE_GET_CONFIG_DATA was not provided in\r
+ RegisterCpuFeature().\r
+ @param[in] State If TRUE, then the Enhanced Intel SpeedStep feature\r
+ must be enabled.\r
+ If FALSE, then the Enhanced Intel SpeedStep feature\r
+ must be disabled.\r
+\r
+ @retval RETURN_SUCCESS Enhanced Intel SpeedStep feature is initialized.\r
+\r
+ @note This service could be called by BSP only.\r
+**/\r
+RETURN_STATUS\r
+EFIAPI\r
+EistInitialize (\r
+ IN UINTN ProcessorNumber,\r
+ IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,\r
+ IN VOID *ConfigData, OPTIONAL\r
+ IN BOOLEAN State\r
+ )\r
+{\r
+ CPU_REGISTER_TABLE_WRITE_FIELD (\r
+ ProcessorNumber,\r
+ Msr,\r
+ MSR_IA32_MISC_ENABLE,\r
+ MSR_IA32_MISC_ENABLE_REGISTER,\r
+ Bits.EIST,\r
+ (State) ? 1 : 0\r
+ );\r
+ return RETURN_SUCCESS;\r
+}\r
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