2 x64-specifc functionality for DxeLoad.
4 Copyright (c) 2006 - 2008, Intel Corporation. <BR>
5 All rights reserved. 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
43 // Allocate 128KB for the Stack
45 BaseOfStack
= AllocatePages (EFI_SIZE_TO_PAGES (STACK_SIZE
));
46 ASSERT (BaseOfStack
!= NULL
);
49 // Compute the top of the stack we were allocated. Pre-allocate a UINTN
52 TopOfStack
= (VOID
*) ((UINTN
) BaseOfStack
+ EFI_SIZE_TO_PAGES (STACK_SIZE
) * EFI_PAGE_SIZE
- CPU_STACK_ALIGNMENT
);
53 TopOfStack
= ALIGN_POINTER (TopOfStack
, CPU_STACK_ALIGNMENT
);
56 // Create page table and save PageMapLevel4 to CR3
58 PageTables
= CreateIdentityMappingPageTables ();
61 // End of PEI phase signal
63 Status
= PeiServicesInstallPpi (&gEndOfPeiSignalPpi
);
64 ASSERT_EFI_ERROR (Status
);
66 AsmWriteCr3 (PageTables
);
69 // Update the contents of BSP stack HOB to reflect the real stack info passed to DxeCore.
71 UpdateStackHob ((EFI_PHYSICAL_ADDRESS
)(UINTN
) BaseOfStack
, STACK_SIZE
);
74 // Transfer the control to the entry point of DxeCore.
77 (SWITCH_STACK_ENTRY_POINT
)(UINTN
)DxeCoreEntryPoint
,