mirror of https://github.com/acidanthera/audk.git
121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/** @file
|
|
x64-specifc functionality for DxeLoad.
|
|
|
|
Copyright (c) 2006 - 2015, 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 "DxeIpl.h"
|
|
#include "X64/VirtualMemory.h"
|
|
|
|
|
|
|
|
/**
|
|
Transfers control to DxeCore.
|
|
|
|
This function performs a CPU architecture specific operations to execute
|
|
the entry point of DxeCore with the parameters of HobList.
|
|
It also installs EFI_END_OF_PEI_PPI to signal the end of PEI phase.
|
|
|
|
@param DxeCoreEntryPoint The entry point of DxeCore.
|
|
@param HobList The start of HobList passed to DxeCore.
|
|
|
|
**/
|
|
VOID
|
|
HandOffToDxeCore (
|
|
IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint,
|
|
IN EFI_PEI_HOB_POINTERS HobList
|
|
)
|
|
{
|
|
VOID *BaseOfStack;
|
|
VOID *TopOfStack;
|
|
EFI_STATUS Status;
|
|
UINTN PageTables;
|
|
UINT32 Index;
|
|
EFI_VECTOR_HANDOFF_INFO *VectorInfo;
|
|
EFI_PEI_VECTOR_HANDOFF_INFO_PPI *VectorHandoffInfoPpi;
|
|
|
|
//
|
|
// Get Vector Hand-off Info PPI and build Guided HOB
|
|
//
|
|
Status = PeiServicesLocatePpi (
|
|
&gEfiVectorHandoffInfoPpiGuid,
|
|
0,
|
|
NULL,
|
|
(VOID **)&VectorHandoffInfoPpi
|
|
);
|
|
if (Status == EFI_SUCCESS) {
|
|
DEBUG ((EFI_D_INFO, "Vector Hand-off Info PPI is gotten, GUIDed HOB is created!\n"));
|
|
VectorInfo = VectorHandoffInfoPpi->Info;
|
|
Index = 1;
|
|
while (VectorInfo->Attribute != EFI_VECTOR_HANDOFF_LAST_ENTRY) {
|
|
VectorInfo ++;
|
|
Index ++;
|
|
}
|
|
BuildGuidDataHob (
|
|
&gEfiVectorHandoffInfoPpiGuid,
|
|
VectorHandoffInfoPpi->Info,
|
|
sizeof (EFI_VECTOR_HANDOFF_INFO) * Index
|
|
);
|
|
}
|
|
|
|
//
|
|
// Allocate 128KB for the Stack
|
|
//
|
|
BaseOfStack = AllocatePages (EFI_SIZE_TO_PAGES (STACK_SIZE));
|
|
ASSERT (BaseOfStack != NULL);
|
|
|
|
//
|
|
// Compute the top of the stack we were allocated. Pre-allocate a UINTN
|
|
// for safety.
|
|
//
|
|
TopOfStack = (VOID *) ((UINTN) BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT);
|
|
TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);
|
|
|
|
PageTables = 0;
|
|
if (FeaturePcdGet (PcdDxeIplBuildPageTables)) {
|
|
//
|
|
// Create page table and save PageMapLevel4 to CR3
|
|
//
|
|
PageTables = CreateIdentityMappingPageTables ((EFI_PHYSICAL_ADDRESS) (UINTN) BaseOfStack, STACK_SIZE);
|
|
} else {
|
|
//
|
|
// Set NX for stack feature also require PcdDxeIplBuildPageTables be TRUE
|
|
// for the DxeIpl and the DxeCore are both X64.
|
|
//
|
|
ASSERT (PcdGetBool (PcdSetNxForStack) == FALSE);
|
|
}
|
|
|
|
//
|
|
// End of PEI phase signal
|
|
//
|
|
Status = PeiServicesInstallPpi (&gEndOfPeiSignalPpi);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
if (FeaturePcdGet (PcdDxeIplBuildPageTables)) {
|
|
AsmWriteCr3 (PageTables);
|
|
}
|
|
|
|
//
|
|
// Update the contents of BSP stack HOB to reflect the real stack info passed to DxeCore.
|
|
//
|
|
UpdateStackHob ((EFI_PHYSICAL_ADDRESS)(UINTN) BaseOfStack, STACK_SIZE);
|
|
|
|
//
|
|
// Transfer the control to the entry point of DxeCore.
|
|
//
|
|
SwitchStack (
|
|
(SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,
|
|
HobList.Raw,
|
|
NULL,
|
|
TopOfStack
|
|
);
|
|
}
|