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/** @file
Machine Check 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.
**/
#include "CpuCommonFeatures.h"
/**
Detects if Machine Check Exception 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 Machine Check Exception feature is supported.
@retval FALSE Machine Check Exception feature is not supported.
@note This service could be called by BSP/APs.
**/
BOOLEAN
EFIAPI
MceSupport (
IN UINTN ProcessorNumber,
IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
IN VOID *ConfigData OPTIONAL
)
{
return (CpuInfo->CpuIdVersionInfoEdx.Bits.MCE == 1);
}
/**
Initializes Machine Check Exception 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 Machine Check Exception feature must be enabled.
If FALSE, then the Machine Check Exception feature must be disabled.
@retval RETURN_SUCCESS Machine Check Exception feature is initialized.
@note This service could be called by BSP only.
**/
RETURN_STATUS
EFIAPI
MceInitialize (
IN UINTN ProcessorNumber,
IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
IN VOID *ConfigData, OPTIONAL
IN BOOLEAN State
)
{
//
// Set MCE bit in CR4
//
CPU_REGISTER_TABLE_WRITE_FIELD (
ProcessorNumber,
ControlRegister,
4,
IA32_CR4,
Bits.MCE,
(State) ? 1 : 0
);
return RETURN_SUCCESS;
}
/**
Detects if Machine Check Architecture 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 Machine Check Architecture feature is supported.
@retval FALSE Machine Check Architecture feature is not supported.
@note This service could be called by BSP/APs.
**/
BOOLEAN
EFIAPI
McaSupport (
IN UINTN ProcessorNumber,
IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
IN VOID *ConfigData OPTIONAL
)
{
return (CpuInfo->CpuIdVersionInfoEdx.Bits.MCA == 1);
}
/**
Initializes Machine Check Architecture 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 Machine Check Architecture feature must be enabled.
If FALSE, then the Machine Check Architecture feature must be disabled.
@retval RETURN_SUCCESS Machine Check Architecture feature is initialized.
@note This service could be called by BSP only.
**/
RETURN_STATUS
EFIAPI
McaInitialize (
IN UINTN ProcessorNumber,
IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
IN VOID *ConfigData, OPTIONAL
IN BOOLEAN State
)
{
MSR_IA32_MCG_CAP_REGISTER McgCap;
UINT32 BankIndex;
McgCap.Uint64 = AsmReadMsr64 (MSR_IA32_MCG_CAP);
for (BankIndex = 0; BankIndex < (UINT32) McgCap.Bits.Count; BankIndex++) {
CPU_REGISTER_TABLE_WRITE64 (
ProcessorNumber,
Msr,
MSR_IA32_MC0_CTL + BankIndex * 4,
MAX_UINT64
);
}
if (PcdGetBool (PcdIsPowerOnReset)) {
for (BankIndex = 0; BankIndex < (UINTN) McgCap.Bits.Count; BankIndex++) {
CPU_REGISTER_TABLE_WRITE64 (
ProcessorNumber,
Msr,
MSR_IA32_MC0_STATUS + BankIndex * 4,
0
);
}
}
return RETURN_SUCCESS;
}
/**
Detects if IA32_MCG_CTL 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 IA32_MCG_CTL feature is supported.
@retval FALSE IA32_MCG_CTL feature is not supported.
@note This service could be called by BSP/APs.
**/
BOOLEAN
EFIAPI
McgCtlSupport (
IN UINTN ProcessorNumber,
IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
IN VOID *ConfigData OPTIONAL
)
{
MSR_IA32_MCG_CAP_REGISTER McgCap;
if (!McaSupport (ProcessorNumber, CpuInfo, ConfigData)) {
return FALSE;
}
McgCap.Uint64 = AsmReadMsr64 (MSR_IA32_MCG_CAP);
return (McgCap.Bits.MCG_CTL_P == 1);
}
/**
Initializes IA32_MCG_CTL 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 IA32_MCG_CTL feature must be enabled.
If FALSE, then the IA32_MCG_CTL feature must be disabled.
@retval RETURN_SUCCESS IA32_MCG_CTL feature is initialized.
@note This service could be called by BSP only.
**/
RETURN_STATUS
EFIAPI
McgCtlInitialize (
IN UINTN ProcessorNumber,
IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
IN VOID *ConfigData, OPTIONAL
IN BOOLEAN State
)
{
CPU_REGISTER_TABLE_WRITE64 (
ProcessorNumber,
Msr,
MSR_IA32_MCG_CTL,
(State)? MAX_UINT64 : 0
);
return RETURN_SUCCESS;
}
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