diff options
Diffstat (limited to 'UefiCpuPkg/Library/CpuCommonFeaturesLib/Eist.c')
| -rw-r--r-- | UefiCpuPkg/Library/CpuCommonFeaturesLib/Eist.c | 162 |
1 files changed, 81 insertions, 81 deletions
diff --git a/UefiCpuPkg/Library/CpuCommonFeaturesLib/Eist.c b/UefiCpuPkg/Library/CpuCommonFeaturesLib/Eist.c index e1d3d42d99..2038171a14 100644 --- a/UefiCpuPkg/Library/CpuCommonFeaturesLib/Eist.c +++ b/UefiCpuPkg/Library/CpuCommonFeaturesLib/Eist.c @@ -1,81 +1,81 @@ -/** @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
+ 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;
+}
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