91d92e2564
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5174 6f19259b-4bc3-4df7-8a09-765794883524
85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/** @file
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Ipf-specifc functionality for DxeLoad.
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Copyright (c) 2006 - 2008, Intel Corporation. <BR>
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All rights reserved. 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 "DxeIpl.h"
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/**
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Transfers control to DxeCore.
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This function performs a CPU architecture specific operations to execute
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the entry point of DxeCore with the parameters of HobList.
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It also intalls EFI_END_OF_PEI_PPI to signal the end of PEI phase.
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@param DxeCoreEntryPoint The entrypoint of DxeCore.
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@param HobList The start of HobList passed to DxeCore.
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@param EndOfPeiSignal The PPI descriptor for EFI_END_OF_PEI_PPI.
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**/
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VOID
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HandOffToDxeCore (
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IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint,
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IN EFI_PEI_HOB_POINTERS HobList,
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IN EFI_PEI_PPI_DESCRIPTOR *EndOfPeiSignal
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)
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{
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VOID *BaseOfStack;
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VOID *TopOfStack;
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VOID *BspStore;
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EFI_STATUS Status;
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//
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// Allocate 128KB for the Stack
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//
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BaseOfStack = AllocatePages (EFI_SIZE_TO_PAGES (STACK_SIZE));
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ASSERT (BaseOfStack != NULL);
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//
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// Allocate 16KB for the BspStore
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//
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BspStore = AllocatePages (EFI_SIZE_TO_PAGES (BSP_STORE_SIZE));
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ASSERT (BspStore != NULL);
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//
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// Build BspStoreHob
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//
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BuildBspStoreHob ((EFI_PHYSICAL_ADDRESS) (UINTN) BspStore, BSP_STORE_SIZE, EfiBootServicesData);
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//
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// Compute the top of the stack we were allocated. Pre-allocate a UINTN
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// for safety.
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//
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TopOfStack = (VOID *) ((UINTN) BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT);
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TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);
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//
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// End of PEI phase singal
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//
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Status = PeiServicesInstallPpi (EndOfPeiSignal);
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ASSERT_EFI_ERROR (Status);
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//
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// Update the contents of BSP stack HOB to reflect the real stack info passed to DxeCore.
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//
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UpdateStackHob ((EFI_PHYSICAL_ADDRESS)(UINTN) BaseOfStack, STACK_SIZE);
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SwitchStack (
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(SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,
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HobList.Raw,
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NULL,
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TopOfStack,
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BspStore
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);
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}
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