return RETURN_SUCCESS;\r
}\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