+++ /dev/null
-/** @file\r
- Local machine check exception feature.\r
-\r
- Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>\r
- This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-\r
-**/\r
-\r
-#include "CpuCommonFeatures.h"\r
-\r
-/**\r
- Detects if Local machine check exception feature supported on current \r
- processor.\r
-\r
- @param[in] ProcessorNumber The index of the CPU executing this function.\r
- @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION\r
- structure for the CPU executing this function.\r
- @param[in] ConfigData A pointer to the configuration buffer returned\r
- by CPU_FEATURE_GET_CONFIG_DATA. NULL if\r
- CPU_FEATURE_GET_CONFIG_DATA was not provided in\r
- RegisterCpuFeature().\r
-\r
- @retval TRUE Local machine check exception feature is supported.\r
- @retval FALSE Local machine check exception feature is not supported.\r
-\r
- @note This service could be called by BSP/APs.\r
-**/\r
-BOOLEAN\r
-EFIAPI\r
-LmceSupport (\r
- IN UINTN ProcessorNumber,\r
- IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,\r
- IN VOID *ConfigData OPTIONAL\r
- )\r
-{\r
- MSR_IA32_MCG_CAP_REGISTER McgCap;\r
-\r
- if (!McaSupport (ProcessorNumber, CpuInfo, ConfigData)) {\r
- return FALSE;\r
- }\r
-\r
- McgCap.Uint64 = AsmReadMsr64 (MSR_IA32_MCG_CAP);\r
- if (ProcessorNumber == 0) {\r
- DEBUG ((EFI_D_INFO, "LMCE eanble = %x\n", (BOOLEAN) (McgCap.Bits.MCG_LMCE_P != 0)));\r
- }\r
- return (BOOLEAN) (McgCap.Bits.MCG_LMCE_P != 0);\r
-}\r
-\r
-/**\r
- Initializes Local machine check exception feature to specific state.\r
-\r
- @param[in] ProcessorNumber The index of the CPU executing this function.\r
- @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION\r
- structure for the CPU executing this function.\r
- @param[in] ConfigData A pointer to the configuration buffer returned\r
- by CPU_FEATURE_GET_CONFIG_DATA. NULL if\r
- CPU_FEATURE_GET_CONFIG_DATA was not provided in\r
- RegisterCpuFeature().\r
- @param[in] State If TRUE, then the Local machine check exception\r
- feature must be enabled.\r
- If FALSE, then the Local machine check exception\r
- feature must be disabled.\r
-\r
- @retval RETURN_SUCCESS Local machine check exception feature is initialized.\r
-\r
-**/\r
-RETURN_STATUS\r
-EFIAPI\r
-LmceInitialize (\r
- IN UINTN ProcessorNumber,\r
- IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,\r
- IN VOID *ConfigData, OPTIONAL\r
- IN BOOLEAN State\r
- )\r
-{\r
- MSR_IA32_FEATURE_CONTROL_REGISTER *MsrRegister;\r
-\r
- ASSERT (ConfigData != NULL);\r
- MsrRegister = (MSR_IA32_FEATURE_CONTROL_REGISTER *) ConfigData;\r
- if (MsrRegister[ProcessorNumber].Bits.Lock == 0) {\r
- CPU_REGISTER_TABLE_WRITE_FIELD (\r
- ProcessorNumber,\r
- Msr,\r
- MSR_IA32_FEATURE_CONTROL,\r
- MSR_IA32_FEATURE_CONTROL_REGISTER,\r
- Bits.LmceOn,\r
- (State) ? 1 : 0\r
- );\r
- }\r
- return RETURN_SUCCESS;\r
-}\r