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Diffstat (limited to 'UefiCpuPkg/Library/CpuCommonFeaturesLib/MachineCheck.c')
-rw-r--r-- | UefiCpuPkg/Library/CpuCommonFeaturesLib/MachineCheck.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/UefiCpuPkg/Library/CpuCommonFeaturesLib/MachineCheck.c b/UefiCpuPkg/Library/CpuCommonFeaturesLib/MachineCheck.c new file mode 100644 index 0000000000..2d9501b91a --- /dev/null +++ b/UefiCpuPkg/Library/CpuCommonFeaturesLib/MachineCheck.c @@ -0,0 +1,231 @@ +/** @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; +} + |