mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-27 16:58:09 +01:00
88 lines
3.2 KiB
C
88 lines
3.2 KiB
C
|
/** @file
|
||
|
|
Enhanced Intel SpeedStep feature.
|
||
|
|
|
||
|
|
Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
|
||
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
||
|
|
|
||
|
|
**/
|
||
|
|
|
||
|
|
#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
|
||
|
|
)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// The scope of the MSR_IA32_MISC_ENABLE is core for below processor type, only program
|
||
|
|
// MSR_IA32_MISC_ENABLE for thread 0 in each core.
|
||
|
|
//
|
||
|
|
if (IS_ATOM_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||
|
||
|
|
IS_CORE_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||
|
||
|
|
IS_CORE2_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel)) {
|
||
|
|
if (CpuInfo->ProcessorInfo.Location.Thread != 0) {
|
||
|
|
return RETURN_SUCCESS;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
CPU_REGISTER_TABLE_WRITE_FIELD (
|
||
|
|
ProcessorNumber,
|
||
|
|
Msr,
|
||
|
|
MSR_IA32_MISC_ENABLE,
|
||
|
|
MSR_IA32_MISC_ENABLE_REGISTER,
|
||
|
|
Bits.EIST,
|
||
|
|
(State) ? 1 : 0
|
||
|
|
);
|
||
|
|
return RETURN_SUCCESS;
|
||
|
|
}
|