/** @file | |
Ipf-specific functionality for DxeLoad. | |
Copyright (c) 2006 - 2008, 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" | |
/** | |
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; | |
VOID *BspStore; | |
EFI_STATUS Status; | |
// | |
// Allocate 128KB for the Stack | |
// | |
BaseOfStack = AllocatePages (EFI_SIZE_TO_PAGES (STACK_SIZE)); | |
ASSERT (BaseOfStack != NULL); | |
// | |
// Allocate 16KB for the BspStore | |
// | |
BspStore = AllocatePages (EFI_SIZE_TO_PAGES (BSP_STORE_SIZE)); | |
ASSERT (BspStore != NULL); | |
// | |
// Build BspStoreHob | |
// | |
BuildBspStoreHob ((EFI_PHYSICAL_ADDRESS) (UINTN) BspStore, BSP_STORE_SIZE, EfiBootServicesData); | |
// | |
// 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); | |
// | |
// End of PEI phase signal | |
// | |
Status = PeiServicesInstallPpi (&gEndOfPeiSignalPpi); | |
ASSERT_EFI_ERROR (Status); | |
// | |
// 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, | |
BspStore | |
); | |
} |