Add capsule > 4GB support. When capsule data is put above 4GB, IA32 PEI transfers to long mode to get capsule data.
Signed-off-by: li-elvin Reviewed-by: lgao4, mdkinney git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12264 6f19259b-4bc3-4df7-8a09-765794883524
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/** @file
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Create the variable to save the base address of page table and stack
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for transferring into long mode in IA32 capsule PEI.
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Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Uefi.h>
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#include <Protocol/Capsule.h>
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#include <Protocol/DxeSmmReadyToLock.h>
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#include <Guid/CapsuleVendor.h>
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#include <Guid/AcpiS3Context.h>
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#include <Library/DebugLib.h>
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#include <Library/PcdLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/UefiRuntimeServicesTableLib.h>
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#include <Library/UefiRuntimeLib.h>
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#include <Library/BaseLib.h>
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#include <Library/LockBoxLib.h>
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#include <Library/UefiLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/HobLib.h>
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/**
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Allocate EfiACPIMemoryNVS below 4G memory address.
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This function allocates EfiACPIMemoryNVS below 4G memory address.
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@param Size Size of memory to allocate.
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@return Allocated address for output.
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**/
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VOID*
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AllocateAcpiNvsMemoryBelow4G (
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IN UINTN Size
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)
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{
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UINTN Pages;
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EFI_PHYSICAL_ADDRESS Address;
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EFI_STATUS Status;
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VOID* Buffer;
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Pages = EFI_SIZE_TO_PAGES (Size);
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Address = 0xffffffff;
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Status = gBS->AllocatePages (
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AllocateMaxAddress,
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EfiACPIMemoryNVS,
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Pages,
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&Address
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);
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ASSERT_EFI_ERROR (Status);
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Buffer = (VOID *) (UINTN) Address;
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ZeroMem (Buffer, Size);
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return Buffer;
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}
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/**
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DxeSmmReadyToLock Protocol notification event handler.
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We reuse S3 ACPI NVS reserved memory to do capsule process
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after reset.
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@param[in] Event Event whose notification function is being invoked.
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@param[in] Context Pointer to the notification function's context.
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**/
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VOID
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EFIAPI
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DxeSmmReadyToLockNotification (
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IN EFI_EVENT Event,
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IN VOID *Context
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)
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{
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EFI_STATUS Status;
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VOID *DxeSmmReadyToLock;
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UINTN VarSize;
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EFI_PHYSICAL_ADDRESS TempAcpiS3Context;
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ACPI_S3_CONTEXT *AcpiS3Context;
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EFI_CAPSULE_LONG_MODE_BUFFER LongModeBuffer;
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UINTN TotalPagesNum;
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UINT8 PhysicalAddressBits;
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VOID *Hob;
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UINT32 NumberOfPml4EntriesNeeded;
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UINT32 NumberOfPdpEntriesNeeded;
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BOOLEAN LockBoxFound;
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Status = gBS->LocateProtocol (
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&gEfiDxeSmmReadyToLockProtocolGuid,
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NULL,
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&DxeSmmReadyToLock
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);
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if (EFI_ERROR (Status)) {
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return ;
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}
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//
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// Get the ACPI NVS pages reserved by AcpiS3Save
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//
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LockBoxFound = FALSE;
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VarSize = sizeof (EFI_PHYSICAL_ADDRESS);
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Status = RestoreLockBox (
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&gEfiAcpiVariableGuid,
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&TempAcpiS3Context,
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&VarSize
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);
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if (!EFI_ERROR (Status)) {
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AcpiS3Context = (ACPI_S3_CONTEXT *)(UINTN)TempAcpiS3Context;
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ASSERT (AcpiS3Context != NULL);
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Status = RestoreLockBox (
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&gEfiAcpiS3ContextGuid,
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NULL,
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NULL
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);
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if (!EFI_ERROR (Status)) {
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LongModeBuffer.PageTableAddress = AcpiS3Context->S3NvsPageTableAddress;
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LongModeBuffer.StackBaseAddress = AcpiS3Context->BootScriptStackBase;
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LongModeBuffer.StackSize = AcpiS3Context->BootScriptStackSize;
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LockBoxFound = TRUE;
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}
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}
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if (!LockBoxFound) {
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//
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// Page table base address and stack base address can not be found in lock box,
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// allocate both here.
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//
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//
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// Get physical address bits supported from CPU HOB.
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//
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PhysicalAddressBits = 36;
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Hob = GetFirstHob (EFI_HOB_TYPE_CPU);
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if (Hob != NULL) {
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PhysicalAddressBits = ((EFI_HOB_CPU *) Hob)->SizeOfMemorySpace;
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}
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//
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// IA-32e paging translates 48-bit linear addresses to 52-bit physical addresses.
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//
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ASSERT (PhysicalAddressBits <= 52);
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if (PhysicalAddressBits > 48) {
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PhysicalAddressBits = 48;
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}
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//
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// Calculate page table size and allocate memory for it.
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//
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if (PhysicalAddressBits <= 39 ) {
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NumberOfPml4EntriesNeeded = 1;
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NumberOfPdpEntriesNeeded = 1 << (PhysicalAddressBits - 30);
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} else {
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NumberOfPml4EntriesNeeded = 1 << (PhysicalAddressBits - 39);
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NumberOfPdpEntriesNeeded = 512;
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}
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TotalPagesNum = (NumberOfPdpEntriesNeeded + 1) * NumberOfPml4EntriesNeeded + 1;
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LongModeBuffer.PageTableAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)AllocateAcpiNvsMemoryBelow4G (EFI_PAGES_TO_SIZE (TotalPagesNum));
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ASSERT (LongModeBuffer.PageTableAddress != 0);
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//
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// Allocate stack
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//
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LongModeBuffer.StackSize = PcdGet32 (PcdCapsulePeiLongModeStackSize);
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LongModeBuffer.StackBaseAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)AllocateAcpiNvsMemoryBelow4G (PcdGet32 (PcdCapsulePeiLongModeStackSize));
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ASSERT (LongModeBuffer.StackBaseAddress != 0);
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}
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Status = gRT->SetVariable (
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EFI_CAPSULE_LONG_MODE_BUFFER_NAME,
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&gEfiCapsuleVendorGuid,
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EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
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sizeof (EFI_CAPSULE_LONG_MODE_BUFFER),
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&LongModeBuffer
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);
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ASSERT_EFI_ERROR (Status);
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//
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// Close event, so it will not be invoked again.
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//
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gBS->CloseEvent (Event);
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return ;
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}
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/**
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Create the variable to save the base address of page table and stack
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for transferring into long mode in IA32 capsule PEI.
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**/
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VOID
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SaveLongModeContext (
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VOID
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)
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{
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VOID *Registration;
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if ((FeaturePcdGet(PcdSupportUpdateCapsuleReset)) && (FeaturePcdGet (PcdDxeIplSwitchToLongMode))) {
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//
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// Register event to get ACPI NVS pages reserved from lock box, these pages will be used by
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// Capsule IA32 PEI to transfer to long mode to access capsule above 4GB.
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//
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EfiCreateProtocolNotifyEvent (
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&gEfiDxeSmmReadyToLockProtocolGuid,
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TPL_CALLBACK,
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DxeSmmReadyToLockNotification,
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NULL,
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&Registration
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);
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}
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}
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