0a70d1c304
This NULL CPU common Features Library instance will register some CPU features
defined in Intel(R) 64 and IA-32 Architectures Software Developer's Manual,
Volume 3, September 2016, Chapter 35 Model-Specific-Registers (MSR).
Add PCD PcdCpuClockModulationDutyCycle and PcdIsPowerOnReset consumed by NULL
CPU Common Features Library instance.
v2:
1. Using MSR_IA32_EFER to enable/disable NX feature instead of using
MSR_IA32_MISC_ENABLE.
2. Fix bug that SMX and VMX feature is swapped.
v3:
1. Add AesniGetConfigData() to get current register state.
v5:
Move MSR reading from AesniGetConfigData() to AesniSupport().
Cc: Feng Tian <feng.tian@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
107 lines
3.8 KiB
C
107 lines
3.8 KiB
C
/** @file
|
|
Clock Modulation 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 Clock Modulation 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 Clock Modulation feature is supported.
|
|
@retval FALSE Clock Modulation feature is not supported.
|
|
|
|
@note This service could be called by BSP/APs.
|
|
**/
|
|
BOOLEAN
|
|
EFIAPI
|
|
ClockModulationSupport (
|
|
IN UINTN ProcessorNumber,
|
|
IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
|
|
IN VOID *ConfigData OPTIONAL
|
|
)
|
|
{
|
|
return (CpuInfo->CpuIdVersionInfoEdx.Bits.ACPI == 1);
|
|
}
|
|
|
|
/**
|
|
Initializes Clock Modulation 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 Clock Modulation feature must be enabled.
|
|
If FALSE, then the Clock Modulation feature must be disabled.
|
|
|
|
@retval RETURN_SUCCESS Clock Modulation feature is initialized.
|
|
|
|
@note This service could be called by BSP only.
|
|
**/
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
ClockModulationInitialize (
|
|
IN UINTN ProcessorNumber,
|
|
IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
|
|
IN VOID *ConfigData, OPTIONAL
|
|
IN BOOLEAN State
|
|
)
|
|
{
|
|
if (IS_SANDY_BRIDGE_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel)) {
|
|
CPU_REGISTER_TABLE_WRITE_FIELD (
|
|
ProcessorNumber,
|
|
Msr,
|
|
MSR_SANDY_BRIDGE_IA32_CLOCK_MODULATION,
|
|
MSR_SANDY_BRIDGE_IA32_CLOCK_MODULATION_REGISTER,
|
|
Bits.OnDemandClockModulationDutyCycle,
|
|
PcdGet8 (PcdCpuClockModulationDutyCycle)
|
|
);
|
|
CPU_REGISTER_TABLE_WRITE_FIELD (
|
|
ProcessorNumber,
|
|
Msr,
|
|
MSR_SANDY_BRIDGE_IA32_CLOCK_MODULATION,
|
|
MSR_SANDY_BRIDGE_IA32_CLOCK_MODULATION_REGISTER,
|
|
Bits.OnDemandClockModulationEnable,
|
|
(State) ? 1 : 0
|
|
);
|
|
} else {
|
|
CPU_REGISTER_TABLE_WRITE_FIELD (
|
|
ProcessorNumber,
|
|
Msr,
|
|
MSR_IA32_CLOCK_MODULATION,
|
|
MSR_IA32_CLOCK_MODULATION_REGISTER,
|
|
Bits.OnDemandClockModulationDutyCycle,
|
|
PcdGet8 (PcdCpuClockModulationDutyCycle)
|
|
);
|
|
CPU_REGISTER_TABLE_WRITE_FIELD (
|
|
ProcessorNumber,
|
|
Msr,
|
|
MSR_IA32_CLOCK_MODULATION,
|
|
MSR_IA32_CLOCK_MODULATION_REGISTER,
|
|
Bits.OnDemandClockModulationEnable,
|
|
(State) ? 1 : 0
|
|
);
|
|
}
|
|
return RETURN_SUCCESS;
|
|
}
|