0d5163977b
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6333 6f19259b-4bc3-4df7-8a09-765794883524
163 lines
5.3 KiB
C
163 lines
5.3 KiB
C
/** @file
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This module provide Hand-Off Block manupulation.
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Copyright (c) 2006, Intel Corporation
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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 "PeiMain.h"
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/**
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Gets the pointer to the HOB List.
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@param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
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@param HobList Pointer to the HOB List.
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@retval EFI_SUCCESS Get the pointer of HOB List
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@retval EFI_NOT_AVAILABLE_YET the HOB List is not yet published
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@retval EFI_INVALID_PARAMETER HobList is NULL (in debug mode)
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**/
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EFI_STATUS
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EFIAPI
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PeiGetHobList (
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IN CONST EFI_PEI_SERVICES **PeiServices,
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IN OUT VOID **HobList
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)
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{
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PEI_CORE_INSTANCE *PrivateData;
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//
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// Only check this parameter in debug mode
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//
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DEBUG_CODE_BEGIN ();
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if (HobList == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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DEBUG_CODE_END ();
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PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS(PeiServices);
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*HobList = PrivateData->HobList.Raw;
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return EFI_SUCCESS;
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}
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/**
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Add a new HOB to the HOB List.
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@param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
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@param Type Type of the new HOB.
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@param Length Length of the new HOB to allocate.
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@param Hob Pointer to the new HOB.
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@return EFI_SUCCESS Success to create hob.
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@retval EFI_INVALID_PARAMETER if Hob is NULL
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@retval EFI_NOT_AVAILABLE_YET if HobList is still not available.
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@retval EFI_OUT_OF_RESOURCES if there is no more memory to grow the Hoblist.
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**/
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EFI_STATUS
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EFIAPI
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PeiCreateHob (
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IN CONST EFI_PEI_SERVICES **PeiServices,
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IN UINT16 Type,
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IN UINT16 Length,
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IN OUT VOID **Hob
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)
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{
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EFI_STATUS Status;
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EFI_HOB_HANDOFF_INFO_TABLE *HandOffHob;
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EFI_HOB_GENERIC_HEADER *HobEnd;
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EFI_PHYSICAL_ADDRESS FreeMemory;
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Status = PeiGetHobList (PeiServices, Hob);
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if (EFI_ERROR(Status)) {
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return Status;
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}
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HandOffHob = *Hob;
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Length = (UINT16)((Length + 0x7) & (~0x7));
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FreeMemory = HandOffHob->EfiFreeMemoryTop -
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HandOffHob->EfiFreeMemoryBottom;
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if (FreeMemory < Length) {
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DEBUG ((EFI_D_ERROR, "PeiCreateHob fail: Length - 0x%08x\n", (UINTN)Length));
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DEBUG ((EFI_D_ERROR, " FreeMemoryTop - 0x%08x\n", (UINTN)HandOffHob->EfiFreeMemoryTop));
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DEBUG ((EFI_D_ERROR, " FreeMemoryBottom - 0x%08x\n", (UINTN)HandOffHob->EfiFreeMemoryBottom));
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return EFI_OUT_OF_RESOURCES;
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}
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*Hob = (VOID*) (UINTN) HandOffHob->EfiEndOfHobList;
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((EFI_HOB_GENERIC_HEADER*) *Hob)->HobType = Type;
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((EFI_HOB_GENERIC_HEADER*) *Hob)->HobLength = Length;
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((EFI_HOB_GENERIC_HEADER*) *Hob)->Reserved = 0;
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HobEnd = (EFI_HOB_GENERIC_HEADER*) ((UINTN) *Hob + Length);
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HandOffHob->EfiEndOfHobList = (EFI_PHYSICAL_ADDRESS) (UINTN) HobEnd;
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HobEnd->HobType = EFI_HOB_TYPE_END_OF_HOB_LIST;
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HobEnd->HobLength = sizeof(EFI_HOB_GENERIC_HEADER);
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HobEnd->Reserved = 0;
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HobEnd++;
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HandOffHob->EfiFreeMemoryBottom = (EFI_PHYSICAL_ADDRESS) (UINTN) HobEnd;
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return EFI_SUCCESS;
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}
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/**
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Builds a Handoff Information Table HOB
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@param BootMode - Current Bootmode
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@param MemoryBegin - Start Memory Address.
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@param MemoryLength - Length of Memory.
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@return EFI_SUCCESS Always success to initialize HOB.
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**/
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EFI_STATUS
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PeiCoreBuildHobHandoffInfoTable (
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IN EFI_BOOT_MODE BootMode,
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IN EFI_PHYSICAL_ADDRESS MemoryBegin,
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IN UINT64 MemoryLength
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)
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{
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EFI_HOB_HANDOFF_INFO_TABLE *Hob;
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EFI_HOB_GENERIC_HEADER *HobEnd;
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Hob = (VOID *)(UINTN)MemoryBegin;
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HobEnd = (EFI_HOB_GENERIC_HEADER*) (Hob+1);
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Hob->Header.HobType = EFI_HOB_TYPE_HANDOFF;
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Hob->Header.HobLength = sizeof(EFI_HOB_HANDOFF_INFO_TABLE);
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Hob->Header.Reserved = 0;
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HobEnd->HobType = EFI_HOB_TYPE_END_OF_HOB_LIST;
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HobEnd->HobLength = sizeof(EFI_HOB_GENERIC_HEADER);
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HobEnd->Reserved = 0;
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Hob->Version = EFI_HOB_HANDOFF_TABLE_VERSION;
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Hob->BootMode = BootMode;
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Hob->EfiMemoryTop = MemoryBegin + MemoryLength;
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Hob->EfiMemoryBottom = MemoryBegin;
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Hob->EfiFreeMemoryTop = MemoryBegin + MemoryLength;
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Hob->EfiFreeMemoryBottom = (EFI_PHYSICAL_ADDRESS) (UINTN) (HobEnd + 1);
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Hob->EfiEndOfHobList = (EFI_PHYSICAL_ADDRESS) (UINTN) HobEnd;
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return EFI_SUCCESS;
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}
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