2 x64-specifc functionality for DxeLoad.
4 Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
16 #include "X64/VirtualMemory.h"
21 Transfers control to DxeCore.
23 This function performs a CPU architecture specific operations to execute
24 the entry point of DxeCore with the parameters of HobList.
25 It also installs EFI_END_OF_PEI_PPI to signal the end of PEI phase.
27 @param DxeCoreEntryPoint The entry point of DxeCore.
28 @param HobList The start of HobList passed to DxeCore.
33 IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint
,
34 IN EFI_PEI_HOB_POINTERS HobList
42 EFI_VECTOR_HANDOFF_INFO
*VectorInfo
;
43 EFI_PEI_VECTOR_HANDOFF_INFO_PPI
*VectorHandoffInfoPpi
;
46 // Get Vector Hand-off Info PPI and build Guided HOB
48 Status
= PeiServicesLocatePpi (
49 &gEfiVectorHandoffInfoPpiGuid
,
52 (VOID
**)&VectorHandoffInfoPpi
54 if (Status
== EFI_SUCCESS
) {
55 DEBUG ((EFI_D_INFO
, "Vector Hand-off Info PPI is gotten, GUIDed HOB is created!\n"));
56 VectorInfo
= VectorHandoffInfoPpi
->Info
;
58 while (VectorInfo
->Attribute
!= EFI_VECTOR_HANDOFF_LAST_ENTRY
) {
63 &gEfiVectorHandoffInfoPpiGuid
,
64 VectorHandoffInfoPpi
->Info
,
65 sizeof (EFI_VECTOR_HANDOFF_INFO
) * Index
70 // Allocate 128KB for the Stack
72 BaseOfStack
= AllocatePages (EFI_SIZE_TO_PAGES (STACK_SIZE
));
73 ASSERT (BaseOfStack
!= NULL
);
76 // Compute the top of the stack we were allocated. Pre-allocate a UINTN
79 TopOfStack
= (VOID
*) ((UINTN
) BaseOfStack
+ EFI_SIZE_TO_PAGES (STACK_SIZE
) * EFI_PAGE_SIZE
- CPU_STACK_ALIGNMENT
);
80 TopOfStack
= ALIGN_POINTER (TopOfStack
, CPU_STACK_ALIGNMENT
);
83 if (FeaturePcdGet (PcdDxeIplBuildPageTables
)) {
85 // Create page table and save PageMapLevel4 to CR3
87 PageTables
= CreateIdentityMappingPageTables ();
91 // End of PEI phase signal
93 Status
= PeiServicesInstallPpi (&gEndOfPeiSignalPpi
);
94 ASSERT_EFI_ERROR (Status
);
96 if (FeaturePcdGet (PcdDxeIplBuildPageTables
)) {
97 AsmWriteCr3 (PageTables
);
101 // Update the contents of BSP stack HOB to reflect the real stack info passed to DxeCore.
103 UpdateStackHob ((EFI_PHYSICAL_ADDRESS
)(UINTN
) BaseOfStack
, STACK_SIZE
);
106 // Transfer the control to the entry point of DxeCore.
109 (SWITCH_STACK_ENTRY_POINT
)(UINTN
)DxeCoreEntryPoint
,