diff options
Diffstat (limited to 'UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.c')
| -rw-r--r-- | UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.c | 780 |
1 files changed, 390 insertions, 390 deletions
diff --git a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.c b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.c index 8fde742dce..6804eddf65 100644 --- a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.c +++ b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.c @@ -1,390 +1,390 @@ -/** @file - CPU Register Table Library functions. - - Copyright (c) 2016, 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 <PiPei.h> - -#include <Library/HobLib.h> -#include <Library/PeiServicesLib.h> -#include <Library/PeiServicesTablePointerLib.h> -#include <Ppi/MpServices.h> -#include "RegisterCpuFeatures.h" - -#define REGISTER_CPU_FEATURES_GUID \ - { \ - 0xa694c467, 0x697a, 0x446b, { 0xb9, 0x29, 0x5b, 0x14, 0xa0, 0xcf, 0x39, 0xf } \ - } - -EFI_GUID mRegisterCpuFeaturesHobGuid = REGISTER_CPU_FEATURES_GUID; - -/** - Worker function to get CPU_FEATURES_DATA pointer. - - @return Pointer to CPU_FEATURES_DATA. -**/ -CPU_FEATURES_DATA * -GetCpuFeaturesData ( - VOID - ) -{ - CPU_FEATURES_DATA *CpuInitData; - EFI_HOB_GUID_TYPE *GuidHob; - VOID *DataInHob; - UINT64 Data64; - - CpuInitData = NULL; - GuidHob = GetFirstGuidHob (&mRegisterCpuFeaturesHobGuid); - if (GuidHob != NULL) { - DataInHob = GET_GUID_HOB_DATA (GuidHob); - CpuInitData = (CPU_FEATURES_DATA *) (*(UINTN *) DataInHob); - ASSERT (CpuInitData != NULL); - } else { - CpuInitData = AllocateZeroPool (sizeof (CPU_FEATURES_DATA)); - ASSERT (CpuInitData != NULL); - // - // Build location of CPU MP DATA buffer in HOB - // - Data64 = (UINT64) (UINTN) CpuInitData; - BuildGuidDataHob ( - &mRegisterCpuFeaturesHobGuid, - (VOID *) &Data64, - sizeof (UINT64) - ); - } - - return CpuInitData; -} - -/** - Worker function to get MP PPI service pointer. - - @return PEI PPI service pointer. -**/ -EFI_PEI_MP_SERVICES_PPI * -GetMpPpi ( - VOID - ) -{ - EFI_STATUS Status; - EFI_PEI_MP_SERVICES_PPI *CpuMpPpi; - - // - // Get MP Services Protocol - // - Status = PeiServicesLocatePpi ( - &gEfiPeiMpServicesPpiGuid, - 0, - NULL, - (VOID **)&CpuMpPpi - ); - ASSERT_EFI_ERROR (Status); - return CpuMpPpi; -} - -/** - Worker function to return processor index. - - @return The processor index. -**/ -UINTN -GetProcessorIndex ( - VOID - ) -{ - EFI_STATUS Status; - EFI_PEI_MP_SERVICES_PPI *CpuMpPpi; - UINTN ProcessorIndex; - - CpuMpPpi = GetMpPpi (); - - Status = CpuMpPpi->WhoAmI(GetPeiServicesTablePointer (), CpuMpPpi, &ProcessorIndex); - ASSERT_EFI_ERROR (Status); - return ProcessorIndex; -} - -/** - Worker function to MP-related information on the requested processor at the - instant this call is made. - - @param[in] ProcessorNumber The handle number of processor. - @param[out] ProcessorInfoBuffer A pointer to the buffer where information for - the requested processor is deposited. - - @return Status of MpServices->GetProcessorInfo(). -**/ -EFI_STATUS -GetProcessorInformation ( - IN UINTN ProcessorNumber, - OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer - ) -{ - EFI_PEI_MP_SERVICES_PPI *CpuMpPpi; - EFI_STATUS Status; - - CpuMpPpi = GetMpPpi (); - Status = CpuMpPpi->GetProcessorInfo ( - GetPeiServicesTablePointer(), - CpuMpPpi, - ProcessorNumber, - ProcessorInfoBuffer - ); - return Status; -} - -/** - Worker function to execute a caller provided function on all enabled APs. - - @param[in] Procedure A pointer to the function to be run on - enabled APs of the system. -**/ -VOID -StartupAPsWorker ( - IN EFI_AP_PROCEDURE Procedure - ) -{ - EFI_STATUS Status; - EFI_PEI_MP_SERVICES_PPI *CpuMpPpi; - - // - // Get MP Services Protocol - // - Status = PeiServicesLocatePpi ( - &gEfiPeiMpServicesPpiGuid, - 0, - NULL, - (VOID **)&CpuMpPpi - ); - ASSERT_EFI_ERROR (Status); - - // - // Wakeup all APs for data collection. - // - Status = CpuMpPpi->StartupAllAPs ( - GetPeiServicesTablePointer (), - CpuMpPpi, - Procedure, - FALSE, - 0, - NULL - ); - ASSERT_EFI_ERROR (Status); -} - -/** - Worker function to switch the requested AP to be the BSP from that point onward. - - @param[in] ProcessorNumber The handle number of AP that is to become the new BSP. -**/ -VOID -SwitchNewBsp ( - IN UINTN ProcessorNumber - ) -{ - EFI_STATUS Status; - EFI_PEI_MP_SERVICES_PPI *CpuMpPpi; - - // - // Get MP Services Protocol - // - Status = PeiServicesLocatePpi ( - &gEfiPeiMpServicesPpiGuid, - 0, - NULL, - (VOID **)&CpuMpPpi - ); - ASSERT_EFI_ERROR (Status); - - // - // Wakeup all APs for data collection. - // - Status = CpuMpPpi->SwitchBSP ( - GetPeiServicesTablePointer (), - CpuMpPpi, - ProcessorNumber, - TRUE - ); - ASSERT_EFI_ERROR (Status); -} - -/** - Worker function to retrieve the number of logical processor in the platform. - - @param[out] NumberOfCpus Pointer to the total number of logical - processors in the system, including the BSP - and disabled APs. - @param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical - processors that exist in system, including - the BSP. -**/ -VOID -GetNumberOfProcessor ( - OUT UINTN *NumberOfCpus, - OUT UINTN *NumberOfEnabledProcessors - ) -{ - EFI_STATUS Status; - EFI_PEI_MP_SERVICES_PPI *CpuMpPpi; - - // - // Get MP Services Protocol - // - Status = PeiServicesLocatePpi ( - &gEfiPeiMpServicesPpiGuid, - 0, - NULL, - (VOID **)&CpuMpPpi - ); - ASSERT_EFI_ERROR (Status); - - // - // Get the number of CPUs - // - Status = CpuMpPpi->GetNumberOfProcessors ( - GetPeiServicesTablePointer (), - CpuMpPpi, - NumberOfCpus, - NumberOfEnabledProcessors - ); - ASSERT_EFI_ERROR (Status); -} - -/** - Allocates ACPI NVS memory to save ACPI_CPU_DATA. - - @return Pointer to allocated ACPI_CPU_DATA. -**/ -ACPI_CPU_DATA * -AllocateAcpiCpuData ( - VOID - ) -{ - EFI_STATUS Status; - EFI_PEI_MP_SERVICES_PPI *CpuMpPpi; - UINTN NumberOfCpus; - UINTN NumberOfEnabledProcessors; - ACPI_CPU_DATA *AcpiCpuData; - EFI_PHYSICAL_ADDRESS Address; - UINTN TableSize; - CPU_REGISTER_TABLE *RegisterTable; - UINTN Index; - EFI_PROCESSOR_INFORMATION ProcessorInfoBuffer; - - Status = PeiServicesAllocatePages ( - EfiACPIMemoryNVS, - EFI_SIZE_TO_PAGES (sizeof (ACPI_CPU_DATA)), - &Address - ); - ASSERT_EFI_ERROR (Status); - AcpiCpuData = (ACPI_CPU_DATA *) (UINTN) Address; - ASSERT (AcpiCpuData != NULL); - - // - // Get MP Services Protocol - // - Status = PeiServicesLocatePpi ( - &gEfiPeiMpServicesPpiGuid, - 0, - NULL, - (VOID **)&CpuMpPpi - ); - ASSERT_EFI_ERROR (Status); - - // - // Get the number of CPUs - // - Status = CpuMpPpi->GetNumberOfProcessors ( - GetPeiServicesTablePointer (), - CpuMpPpi, - &NumberOfCpus, - &NumberOfEnabledProcessors - ); - ASSERT_EFI_ERROR (Status); - AcpiCpuData->NumberOfCpus = (UINT32)NumberOfCpus; - - // - // Allocate buffer for empty RegisterTable and PreSmmInitRegisterTable for all CPUs - // - TableSize = 2 * NumberOfCpus * sizeof (CPU_REGISTER_TABLE); - Status = PeiServicesAllocatePages ( - EfiACPIMemoryNVS, - EFI_SIZE_TO_PAGES (TableSize), - &Address - ); - ASSERT_EFI_ERROR (Status); - RegisterTable = (CPU_REGISTER_TABLE *) (UINTN) Address; - - for (Index = 0; Index < NumberOfCpus; Index++) { - Status = CpuMpPpi->GetProcessorInfo ( - GetPeiServicesTablePointer (), - CpuMpPpi, - Index, - &ProcessorInfoBuffer - ); - ASSERT_EFI_ERROR (Status); - - RegisterTable[Index].InitialApicId = (UINT32)ProcessorInfoBuffer.ProcessorId; - RegisterTable[Index].TableLength = 0; - RegisterTable[Index].AllocatedSize = 0; - RegisterTable[Index].RegisterTableEntry = 0; - - RegisterTable[NumberOfCpus + Index].InitialApicId = (UINT32)ProcessorInfoBuffer.ProcessorId; - RegisterTable[NumberOfCpus + Index].TableLength = 0; - RegisterTable[NumberOfCpus + Index].AllocatedSize = 0; - RegisterTable[NumberOfCpus + Index].RegisterTableEntry = 0; - } - AcpiCpuData->RegisterTable = (EFI_PHYSICAL_ADDRESS)(UINTN)RegisterTable; - AcpiCpuData->PreSmmInitRegisterTable = (EFI_PHYSICAL_ADDRESS)(UINTN)(RegisterTable + NumberOfCpus); - - return AcpiCpuData; -} - -/** - Enlarges CPU register table for each processor. - - @param[in, out] RegisterTable Pointer processor's CPU register table -**/ -VOID -EnlargeRegisterTable ( - IN OUT CPU_REGISTER_TABLE *RegisterTable - ) -{ - EFI_STATUS Status; - EFI_PHYSICAL_ADDRESS Address; - UINTN AllocatePages; - - AllocatePages = RegisterTable->AllocatedSize / EFI_PAGE_SIZE; - Status = PeiServicesAllocatePages ( - EfiACPIMemoryNVS, - AllocatePages + 1, - &Address - ); - ASSERT_EFI_ERROR (Status); - - // - // If there are records existing in the register table, then copy its contents - // to new region and free the old one. - // - if (RegisterTable->AllocatedSize > 0) { - CopyMem ( - (VOID *) (UINTN) Address, - (VOID *) (UINTN) RegisterTable->RegisterTableEntry, - RegisterTable->AllocatedSize - ); - } - - // - // Adjust the allocated size and register table base address. - // - RegisterTable->AllocatedSize += EFI_PAGE_SIZE; - RegisterTable->RegisterTableEntry = Address; -} +/** @file
+ CPU Register Table Library functions.
+
+ Copyright (c) 2016, 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 <PiPei.h>
+
+#include <Library/HobLib.h>
+#include <Library/PeiServicesLib.h>
+#include <Library/PeiServicesTablePointerLib.h>
+#include <Ppi/MpServices.h>
+#include "RegisterCpuFeatures.h"
+
+#define REGISTER_CPU_FEATURES_GUID \
+ { \
+ 0xa694c467, 0x697a, 0x446b, { 0xb9, 0x29, 0x5b, 0x14, 0xa0, 0xcf, 0x39, 0xf } \
+ }
+
+EFI_GUID mRegisterCpuFeaturesHobGuid = REGISTER_CPU_FEATURES_GUID;
+
+/**
+ Worker function to get CPU_FEATURES_DATA pointer.
+
+ @return Pointer to CPU_FEATURES_DATA.
+**/
+CPU_FEATURES_DATA *
+GetCpuFeaturesData (
+ VOID
+ )
+{
+ CPU_FEATURES_DATA *CpuInitData;
+ EFI_HOB_GUID_TYPE *GuidHob;
+ VOID *DataInHob;
+ UINT64 Data64;
+
+ CpuInitData = NULL;
+ GuidHob = GetFirstGuidHob (&mRegisterCpuFeaturesHobGuid);
+ if (GuidHob != NULL) {
+ DataInHob = GET_GUID_HOB_DATA (GuidHob);
+ CpuInitData = (CPU_FEATURES_DATA *) (*(UINTN *) DataInHob);
+ ASSERT (CpuInitData != NULL);
+ } else {
+ CpuInitData = AllocateZeroPool (sizeof (CPU_FEATURES_DATA));
+ ASSERT (CpuInitData != NULL);
+ //
+ // Build location of CPU MP DATA buffer in HOB
+ //
+ Data64 = (UINT64) (UINTN) CpuInitData;
+ BuildGuidDataHob (
+ &mRegisterCpuFeaturesHobGuid,
+ (VOID *) &Data64,
+ sizeof (UINT64)
+ );
+ }
+
+ return CpuInitData;
+}
+
+/**
+ Worker function to get MP PPI service pointer.
+
+ @return PEI PPI service pointer.
+**/
+EFI_PEI_MP_SERVICES_PPI *
+GetMpPpi (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ EFI_PEI_MP_SERVICES_PPI *CpuMpPpi;
+
+ //
+ // Get MP Services Protocol
+ //
+ Status = PeiServicesLocatePpi (
+ &gEfiPeiMpServicesPpiGuid,
+ 0,
+ NULL,
+ (VOID **)&CpuMpPpi
+ );
+ ASSERT_EFI_ERROR (Status);
+ return CpuMpPpi;
+}
+
+/**
+ Worker function to return processor index.
+
+ @return The processor index.
+**/
+UINTN
+GetProcessorIndex (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ EFI_PEI_MP_SERVICES_PPI *CpuMpPpi;
+ UINTN ProcessorIndex;
+
+ CpuMpPpi = GetMpPpi ();
+
+ Status = CpuMpPpi->WhoAmI(GetPeiServicesTablePointer (), CpuMpPpi, &ProcessorIndex);
+ ASSERT_EFI_ERROR (Status);
+ return ProcessorIndex;
+}
+
+/**
+ Worker function to MP-related information on the requested processor at the
+ instant this call is made.
+
+ @param[in] ProcessorNumber The handle number of processor.
+ @param[out] ProcessorInfoBuffer A pointer to the buffer where information for
+ the requested processor is deposited.
+
+ @return Status of MpServices->GetProcessorInfo().
+**/
+EFI_STATUS
+GetProcessorInformation (
+ IN UINTN ProcessorNumber,
+ OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer
+ )
+{
+ EFI_PEI_MP_SERVICES_PPI *CpuMpPpi;
+ EFI_STATUS Status;
+
+ CpuMpPpi = GetMpPpi ();
+ Status = CpuMpPpi->GetProcessorInfo (
+ GetPeiServicesTablePointer(),
+ CpuMpPpi,
+ ProcessorNumber,
+ ProcessorInfoBuffer
+ );
+ return Status;
+}
+
+/**
+ Worker function to execute a caller provided function on all enabled APs.
+
+ @param[in] Procedure A pointer to the function to be run on
+ enabled APs of the system.
+**/
+VOID
+StartupAPsWorker (
+ IN EFI_AP_PROCEDURE Procedure
+ )
+{
+ EFI_STATUS Status;
+ EFI_PEI_MP_SERVICES_PPI *CpuMpPpi;
+
+ //
+ // Get MP Services Protocol
+ //
+ Status = PeiServicesLocatePpi (
+ &gEfiPeiMpServicesPpiGuid,
+ 0,
+ NULL,
+ (VOID **)&CpuMpPpi
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Wakeup all APs for data collection.
+ //
+ Status = CpuMpPpi->StartupAllAPs (
+ GetPeiServicesTablePointer (),
+ CpuMpPpi,
+ Procedure,
+ FALSE,
+ 0,
+ NULL
+ );
+ ASSERT_EFI_ERROR (Status);
+}
+
+/**
+ Worker function to switch the requested AP to be the BSP from that point onward.
+
+ @param[in] ProcessorNumber The handle number of AP that is to become the new BSP.
+**/
+VOID
+SwitchNewBsp (
+ IN UINTN ProcessorNumber
+ )
+{
+ EFI_STATUS Status;
+ EFI_PEI_MP_SERVICES_PPI *CpuMpPpi;
+
+ //
+ // Get MP Services Protocol
+ //
+ Status = PeiServicesLocatePpi (
+ &gEfiPeiMpServicesPpiGuid,
+ 0,
+ NULL,
+ (VOID **)&CpuMpPpi
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Wakeup all APs for data collection.
+ //
+ Status = CpuMpPpi->SwitchBSP (
+ GetPeiServicesTablePointer (),
+ CpuMpPpi,
+ ProcessorNumber,
+ TRUE
+ );
+ ASSERT_EFI_ERROR (Status);
+}
+
+/**
+ Worker function to retrieve the number of logical processor in the platform.
+
+ @param[out] NumberOfCpus Pointer to the total number of logical
+ processors in the system, including the BSP
+ and disabled APs.
+ @param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical
+ processors that exist in system, including
+ the BSP.
+**/
+VOID
+GetNumberOfProcessor (
+ OUT UINTN *NumberOfCpus,
+ OUT UINTN *NumberOfEnabledProcessors
+ )
+{
+ EFI_STATUS Status;
+ EFI_PEI_MP_SERVICES_PPI *CpuMpPpi;
+
+ //
+ // Get MP Services Protocol
+ //
+ Status = PeiServicesLocatePpi (
+ &gEfiPeiMpServicesPpiGuid,
+ 0,
+ NULL,
+ (VOID **)&CpuMpPpi
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Get the number of CPUs
+ //
+ Status = CpuMpPpi->GetNumberOfProcessors (
+ GetPeiServicesTablePointer (),
+ CpuMpPpi,
+ NumberOfCpus,
+ NumberOfEnabledProcessors
+ );
+ ASSERT_EFI_ERROR (Status);
+}
+
+/**
+ Allocates ACPI NVS memory to save ACPI_CPU_DATA.
+
+ @return Pointer to allocated ACPI_CPU_DATA.
+**/
+ACPI_CPU_DATA *
+AllocateAcpiCpuData (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ EFI_PEI_MP_SERVICES_PPI *CpuMpPpi;
+ UINTN NumberOfCpus;
+ UINTN NumberOfEnabledProcessors;
+ ACPI_CPU_DATA *AcpiCpuData;
+ EFI_PHYSICAL_ADDRESS Address;
+ UINTN TableSize;
+ CPU_REGISTER_TABLE *RegisterTable;
+ UINTN Index;
+ EFI_PROCESSOR_INFORMATION ProcessorInfoBuffer;
+
+ Status = PeiServicesAllocatePages (
+ EfiACPIMemoryNVS,
+ EFI_SIZE_TO_PAGES (sizeof (ACPI_CPU_DATA)),
+ &Address
+ );
+ ASSERT_EFI_ERROR (Status);
+ AcpiCpuData = (ACPI_CPU_DATA *) (UINTN) Address;
+ ASSERT (AcpiCpuData != NULL);
+
+ //
+ // Get MP Services Protocol
+ //
+ Status = PeiServicesLocatePpi (
+ &gEfiPeiMpServicesPpiGuid,
+ 0,
+ NULL,
+ (VOID **)&CpuMpPpi
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Get the number of CPUs
+ //
+ Status = CpuMpPpi->GetNumberOfProcessors (
+ GetPeiServicesTablePointer (),
+ CpuMpPpi,
+ &NumberOfCpus,
+ &NumberOfEnabledProcessors
+ );
+ ASSERT_EFI_ERROR (Status);
+ AcpiCpuData->NumberOfCpus = (UINT32)NumberOfCpus;
+
+ //
+ // Allocate buffer for empty RegisterTable and PreSmmInitRegisterTable for all CPUs
+ //
+ TableSize = 2 * NumberOfCpus * sizeof (CPU_REGISTER_TABLE);
+ Status = PeiServicesAllocatePages (
+ EfiACPIMemoryNVS,
+ EFI_SIZE_TO_PAGES (TableSize),
+ &Address
+ );
+ ASSERT_EFI_ERROR (Status);
+ RegisterTable = (CPU_REGISTER_TABLE *) (UINTN) Address;
+
+ for (Index = 0; Index < NumberOfCpus; Index++) {
+ Status = CpuMpPpi->GetProcessorInfo (
+ GetPeiServicesTablePointer (),
+ CpuMpPpi,
+ Index,
+ &ProcessorInfoBuffer
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ RegisterTable[Index].InitialApicId = (UINT32)ProcessorInfoBuffer.ProcessorId;
+ RegisterTable[Index].TableLength = 0;
+ RegisterTable[Index].AllocatedSize = 0;
+ RegisterTable[Index].RegisterTableEntry = 0;
+
+ RegisterTable[NumberOfCpus + Index].InitialApicId = (UINT32)ProcessorInfoBuffer.ProcessorId;
+ RegisterTable[NumberOfCpus + Index].TableLength = 0;
+ RegisterTable[NumberOfCpus + Index].AllocatedSize = 0;
+ RegisterTable[NumberOfCpus + Index].RegisterTableEntry = 0;
+ }
+ AcpiCpuData->RegisterTable = (EFI_PHYSICAL_ADDRESS)(UINTN)RegisterTable;
+ AcpiCpuData->PreSmmInitRegisterTable = (EFI_PHYSICAL_ADDRESS)(UINTN)(RegisterTable + NumberOfCpus);
+
+ return AcpiCpuData;
+}
+
+/**
+ Enlarges CPU register table for each processor.
+
+ @param[in, out] RegisterTable Pointer processor's CPU register table
+**/
+VOID
+EnlargeRegisterTable (
+ IN OUT CPU_REGISTER_TABLE *RegisterTable
+ )
+{
+ EFI_STATUS Status;
+ EFI_PHYSICAL_ADDRESS Address;
+ UINTN AllocatePages;
+
+ AllocatePages = RegisterTable->AllocatedSize / EFI_PAGE_SIZE;
+ Status = PeiServicesAllocatePages (
+ EfiACPIMemoryNVS,
+ AllocatePages + 1,
+ &Address
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // If there are records existing in the register table, then copy its contents
+ // to new region and free the old one.
+ //
+ if (RegisterTable->AllocatedSize > 0) {
+ CopyMem (
+ (VOID *) (UINTN) Address,
+ (VOID *) (UINTN) RegisterTable->RegisterTableEntry,
+ RegisterTable->AllocatedSize
+ );
+ }
+
+ //
+ // Adjust the allocated size and register table base address.
+ //
+ RegisterTable->AllocatedSize += EFI_PAGE_SIZE;
+ RegisterTable->RegisterTableEntry = Address;
+}
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