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/** @file
This file implements some PEI services about Hob.
Copyright (c) 2023, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "UnitTestPeiServicesTablePointerLib.h"
/**
Gets the pointer to the HOB List.
@param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
@param HobList Pointer to the HOB List.
@retval EFI_SUCCESS Get the pointer of HOB List
@retval EFI_NOT_AVAILABLE_YET the HOB List is not yet published
@retval EFI_INVALID_PARAMETER HobList is NULL (in debug mode)
**/
EFI_STATUS
EFIAPI
UnitTestGetHobList (
IN CONST EFI_PEI_SERVICES **PeiServices,
IN OUT VOID **HobList
)
{
PEI_CORE_INSTANCE *PrivateData;
if (HobList == NULL) {
return EFI_INVALID_PARAMETER;
}
PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS (PeiServices);
*HobList = PrivateData->HobList.Raw;
return EFI_SUCCESS;
}
/**
Add a new HOB to the HOB List.
@param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
@param Type Type of the new HOB.
@param Length Length of the new HOB to allocate.
@param Hob Pointer to the new HOB.
@return EFI_SUCCESS Success to create HOB.
@retval EFI_INVALID_PARAMETER if Hob is NULL
@retval EFI_NOT_AVAILABLE_YET if HobList is still not available.
@retval EFI_OUT_OF_RESOURCES if there is no more memory to grow the Hoblist.
**/
EFI_STATUS
EFIAPI
UnitTestCreateHob (
IN CONST EFI_PEI_SERVICES **PeiServices,
IN UINT16 Type,
IN UINT16 Length,
IN OUT VOID **Hob
)
{
EFI_STATUS Status;
EFI_HOB_HANDOFF_INFO_TABLE *HandOffHob;
EFI_HOB_GENERIC_HEADER *HobEnd;
EFI_PHYSICAL_ADDRESS FreeMemory;
Status = UnitTestGetHobList (PeiServices, Hob);
if (EFI_ERROR (Status)) {
return Status;
}
HandOffHob = *Hob;
//
// Check Length to avoid data overflow.
//
if (0x10000 - Length <= 0x7) {
return EFI_INVALID_PARAMETER;
}
Length = (UINT16)((Length + 0x7) & (~0x7));
FreeMemory = HandOffHob->EfiFreeMemoryTop -
HandOffHob->EfiFreeMemoryBottom;
if (FreeMemory < Length) {
DEBUG ((DEBUG_ERROR, "PeiCreateHob fail: Length - 0x%08x\n", (UINTN)Length));
DEBUG ((DEBUG_ERROR, " FreeMemoryTop - 0x%08x\n", (UINTN)HandOffHob->EfiFreeMemoryTop));
DEBUG ((DEBUG_ERROR, " FreeMemoryBottom - 0x%08x\n", (UINTN)HandOffHob->EfiFreeMemoryBottom));
return EFI_OUT_OF_RESOURCES;
}
*Hob = (VOID *)(UINTN)HandOffHob->EfiEndOfHobList;
((EFI_HOB_GENERIC_HEADER *)*Hob)->HobType = Type;
((EFI_HOB_GENERIC_HEADER *)*Hob)->HobLength = Length;
((EFI_HOB_GENERIC_HEADER *)*Hob)->Reserved = 0;
HobEnd = (EFI_HOB_GENERIC_HEADER *)((UINTN)*Hob + Length);
HandOffHob->EfiEndOfHobList = (EFI_PHYSICAL_ADDRESS)(UINTN)HobEnd;
HobEnd->HobType = EFI_HOB_TYPE_END_OF_HOB_LIST;
HobEnd->HobLength = (UINT16)sizeof (EFI_HOB_GENERIC_HEADER);
HobEnd->Reserved = 0;
HobEnd++;
HandOffHob->EfiFreeMemoryBottom = (EFI_PHYSICAL_ADDRESS)(UINTN)HobEnd;
return EFI_SUCCESS;
}
/**
Builds a Handoff Information Table HOB
@param BootMode - Current Bootmode
@param MemoryBegin - Start Memory Address.
@param MemoryLength - Length of Memory.
@return EFI_SUCCESS Always success to initialize HOB.
**/
EFI_STATUS
UnitTestCoreBuildHobHandoffInfoTable (
IN EFI_BOOT_MODE BootMode,
IN EFI_PHYSICAL_ADDRESS MemoryBegin,
IN UINT64 MemoryLength
)
{
EFI_HOB_HANDOFF_INFO_TABLE *Hob;
EFI_HOB_GENERIC_HEADER *HobEnd;
Hob = (VOID *)(UINTN)MemoryBegin;
HobEnd = (EFI_HOB_GENERIC_HEADER *)(Hob+1);
Hob->Header.HobType = EFI_HOB_TYPE_HANDOFF;
Hob->Header.HobLength = (UINT16)sizeof (EFI_HOB_HANDOFF_INFO_TABLE);
Hob->Header.Reserved = 0;
HobEnd->HobType = EFI_HOB_TYPE_END_OF_HOB_LIST;
HobEnd->HobLength = (UINT16)sizeof (EFI_HOB_GENERIC_HEADER);
HobEnd->Reserved = 0;
Hob->Version = EFI_HOB_HANDOFF_TABLE_VERSION;
Hob->BootMode = BootMode;
Hob->EfiMemoryTop = MemoryBegin + MemoryLength;
Hob->EfiMemoryBottom = MemoryBegin;
Hob->EfiFreeMemoryTop = MemoryBegin + MemoryLength;
Hob->EfiFreeMemoryBottom = (EFI_PHYSICAL_ADDRESS)(UINTN)(HobEnd + 1);
Hob->EfiEndOfHobList = (EFI_PHYSICAL_ADDRESS)(UINTN)HobEnd;
return EFI_SUCCESS;
}
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