-/** @file
- X2Apic 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 X2Apci feature supported on current processor.
-
- Detect if X2Apci has been already enabled.
-
- @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 X2Apci feature is supported.
- @retval FALSE X2Apci feature is not supported.
-
- @note This service could be called by BSP/APs.
-**/
-BOOLEAN
-EFIAPI
-X2ApicSupport (
- IN UINTN ProcessorNumber,
- IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
- IN VOID *ConfigData OPTIONAL
- )
-{
- return (GetApicMode () == LOCAL_APIC_MODE_X2APIC);
-}
-
-/**
- Initializes X2Apci 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 X2Apci feature must be enabled.
- If FALSE, then the X2Apci feature must be disabled.
-
- @retval RETURN_SUCCESS X2Apci feature is initialized.
-
- @note This service could be called by BSP only.
-**/
-RETURN_STATUS
-EFIAPI
-X2ApicInitialize (
- IN UINTN ProcessorNumber,
- IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
- IN VOID *ConfigData, OPTIONAL
- IN BOOLEAN State
- )
-{
- PRE_SMM_CPU_REGISTER_TABLE_WRITE_FIELD (
- ProcessorNumber,
- Msr,
- MSR_IA32_APIC_BASE,
- MSR_IA32_APIC_BASE_REGISTER,
- Bits.EXTD,
- (State) ? 1 : 0
- );
- return RETURN_SUCCESS;
-}
+/** @file\r
+ X2Apic feature.\r
+\r
+ Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>\r
+ SPDX-License-Identifier: BSD-2-Clause-Patent\r
+\r
+**/\r
+\r
+#include "CpuCommonFeatures.h"\r
+\r
+/**\r
+ Prepares for the data used by CPU feature detection and initialization.\r
+\r
+ @param[in] NumberOfProcessors The number of CPUs in the platform.\r
+\r
+ @return Pointer to a buffer of CPU related configuration data.\r
+\r
+ @note This service could be called by BSP only.\r
+**/\r
+VOID *\r
+EFIAPI\r
+X2ApicGetConfigData (\r
+ IN UINTN NumberOfProcessors\r
+ )\r
+{\r
+ BOOLEAN *ConfigData;\r
+\r
+ ConfigData = AllocateZeroPool (sizeof (BOOLEAN) * NumberOfProcessors);\r
+ ASSERT (ConfigData != NULL);\r
+ return ConfigData;\r
+}\r
+\r
+/**\r
+ Detects if X2Apci feature supported on current processor.\r
+\r
+ Detect if X2Apci has been already enabled.\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 X2Apci feature is supported.\r
+ @retval FALSE X2Apci feature is not supported.\r
+\r
+ @note This service could be called by BSP/APs.\r
+**/\r
+BOOLEAN\r
+EFIAPI\r
+X2ApicSupport (\r
+ IN UINTN ProcessorNumber,\r
+ IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,\r
+ IN VOID *ConfigData OPTIONAL\r
+ )\r
+{\r
+ BOOLEAN *X2ApicEnabled;\r
+\r
+ ASSERT (ConfigData != NULL);\r
+ X2ApicEnabled = (BOOLEAN *) ConfigData;\r
+ //\r
+ // *ConfigData indicates if X2APIC enabled on current processor\r
+ //\r
+ X2ApicEnabled[ProcessorNumber] = (GetApicMode () == LOCAL_APIC_MODE_X2APIC) ? TRUE : FALSE;\r
+\r
+ return (CpuInfo->CpuIdVersionInfoEcx.Bits.x2APIC == 1);\r
+}\r
+\r
+/**\r
+ Initializes X2Apci 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 X2Apci feature must be enabled.\r
+ If FALSE, then the X2Apci feature must be disabled.\r
+\r
+ @retval RETURN_SUCCESS X2Apci feature is initialized.\r
+\r
+ @note This service could be called by BSP only.\r
+**/\r
+RETURN_STATUS\r
+EFIAPI\r
+X2ApicInitialize (\r
+ IN UINTN ProcessorNumber,\r
+ IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,\r
+ IN VOID *ConfigData, OPTIONAL\r
+ IN BOOLEAN State\r
+ )\r
+{\r
+ BOOLEAN *X2ApicEnabled;\r
+\r
+ //\r
+ // The scope of the MSR_IA32_APIC_BASE is core for below processor type, only program\r
+ // MSR_IA32_APIC_BASE for thread 0 in each core.\r
+ //\r
+ if (IS_SILVERMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel)) {\r
+ if (CpuInfo->ProcessorInfo.Location.Thread != 0) {\r
+ return RETURN_SUCCESS;\r
+ }\r
+ }\r
+\r
+ ASSERT (ConfigData != NULL);\r
+ X2ApicEnabled = (BOOLEAN *) ConfigData;\r
+ if (X2ApicEnabled[ProcessorNumber]) {\r
+ PRE_SMM_CPU_REGISTER_TABLE_WRITE_FIELD (\r
+ ProcessorNumber,\r
+ Msr,\r
+ MSR_IA32_APIC_BASE,\r
+ MSR_IA32_APIC_BASE_REGISTER,\r
+ Bits.EXTD,\r
+ 1\r
+ );\r
+ } else {\r
+ //\r
+ // Enable X2APIC mode only if X2APIC is not enabled,\r
+ // Needn't to disabe X2APIC mode again if X2APIC is not enabled\r
+ //\r
+ if (State) {\r
+ CPU_REGISTER_TABLE_WRITE_FIELD (\r
+ ProcessorNumber,\r
+ Msr,\r
+ MSR_IA32_APIC_BASE,\r
+ MSR_IA32_APIC_BASE_REGISTER,\r
+ Bits.EXTD,\r
+ 1\r
+ );\r
+ }\r
+ }\r
+ return RETURN_SUCCESS;\r
+}\r
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