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/** @file
Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "UefiPayloadEntry.h"
/**
Allocate pages for code.
@param[in] Pages Number of pages to be allocated.
@return Allocated memory.
**/
VOID*
AllocateCodePages (
IN UINTN Pages
)
{
VOID *Alloc;
EFI_PEI_HOB_POINTERS Hob;
Alloc = AllocatePages (Pages);
if (Alloc == NULL) {
return NULL;
}
// find the HOB we just created, and change the type to EfiBootServicesCode
Hob.Raw = GetFirstHob (EFI_HOB_TYPE_MEMORY_ALLOCATION);
while (Hob.Raw != NULL) {
if (Hob.MemoryAllocation->AllocDescriptor.MemoryBaseAddress == (UINTN)Alloc) {
Hob.MemoryAllocation->AllocDescriptor.MemoryType = EfiBootServicesCode;
return Alloc;
}
Hob.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, GET_NEXT_HOB (Hob));
}
ASSERT (FALSE);
FreePages (Alloc, Pages);
return NULL;
}
/**
Loads and relocates a PE/COFF image
@param[in] PeCoffImage Point to a Pe/Coff image.
@param[out] ImageAddress The image memory address after relocation.
@param[out] ImageSize The image size.
@param[out] EntryPoint The image entry point.
@return EFI_SUCCESS If the image is loaded and relocated successfully.
@return Others If the image failed to load or relocate.
**/
EFI_STATUS
LoadPeCoffImage (
IN VOID *PeCoffImage,
OUT EFI_PHYSICAL_ADDRESS *ImageAddress,
OUT UINT64 *ImageSize,
OUT EFI_PHYSICAL_ADDRESS *EntryPoint
)
{
RETURN_STATUS Status;
PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;
VOID *Buffer;
ZeroMem (&ImageContext, sizeof (ImageContext));
ImageContext.Handle = PeCoffImage;
ImageContext.ImageRead = PeCoffLoaderImageReadFromMemory;
Status = PeCoffLoaderGetImageInfo (&ImageContext);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return Status;
}
//
// Allocate Memory for the image
//
Buffer = AllocateCodePages (EFI_SIZE_TO_PAGES((UINT32)ImageContext.ImageSize));
if (Buffer == NULL) {
return EFI_OUT_OF_RESOURCES;
}
ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)Buffer;
//
// Load the image to our new buffer
//
Status = PeCoffLoaderLoadImage (&ImageContext);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return Status;
}
//
// Relocate the image in our new buffer
//
Status = PeCoffLoaderRelocateImage (&ImageContext);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return Status;
}
*ImageAddress = ImageContext.ImageAddress;
*ImageSize = ImageContext.ImageSize;
*EntryPoint = ImageContext.EntryPoint;
return EFI_SUCCESS;
}
/**
This function searchs a given file type with a given Guid within a valid FV.
If input Guid is NULL, will locate the first section having the given file type
@param FvHeader A pointer to firmware volume header that contains the set of files
to be searched.
@param FileType File type to be searched.
@param Guid Will ignore if it is NULL.
@param FileHeader A pointer to the discovered file, if successful.
@retval EFI_SUCCESS Successfully found FileType
@retval EFI_NOT_FOUND File type can't be found.
**/
EFI_STATUS
FvFindFileByTypeGuid (
IN EFI_FIRMWARE_VOLUME_HEADER *FvHeader,
IN EFI_FV_FILETYPE FileType,
IN EFI_GUID *Guid OPTIONAL,
OUT EFI_FFS_FILE_HEADER **FileHeader
)
{
EFI_PHYSICAL_ADDRESS CurrentAddress;
EFI_PHYSICAL_ADDRESS EndOfFirmwareVolume;
EFI_FFS_FILE_HEADER *File;
UINT32 Size;
EFI_PHYSICAL_ADDRESS EndOfFile;
CurrentAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) FvHeader;
EndOfFirmwareVolume = CurrentAddress + FvHeader->FvLength;
//
// Loop through the FFS files
//
for (EndOfFile = CurrentAddress + FvHeader->HeaderLength; ; ) {
CurrentAddress = (EndOfFile + 7) & 0xfffffffffffffff8ULL;
if (CurrentAddress > EndOfFirmwareVolume) {
break;
}
File = (EFI_FFS_FILE_HEADER*)(UINTN) CurrentAddress;
if (IS_FFS_FILE2 (File)) {
Size = FFS_FILE2_SIZE (File);
if (Size <= 0x00FFFFFF) {
break;
}
} else {
Size = FFS_FILE_SIZE (File);
if (Size < sizeof (EFI_FFS_FILE_HEADER)) {
break;
}
}
EndOfFile = CurrentAddress + Size;
if (EndOfFile > EndOfFirmwareVolume) {
break;
}
//
// Look for file type
//
if (File->Type == FileType) {
if (Guid == NULL || CompareGuid(&File->Name, Guid)) {
*FileHeader = File;
return EFI_SUCCESS;
}
}
}
return EFI_NOT_FOUND;
}
/**
This function searchs a given section type within a valid FFS file.
@param FileHeader A pointer to the file header that contains the set of sections to
be searched.
@param SectionType The value of the section type to search.
@param SectionData A pointer to the discovered section, if successful.
@retval EFI_SUCCESS The section was found.
@retval EFI_NOT_FOUND The section was not found.
**/
EFI_STATUS
FileFindSection (
IN EFI_FFS_FILE_HEADER *FileHeader,
IN EFI_SECTION_TYPE SectionType,
OUT VOID **SectionData
)
{
UINT32 FileSize;
EFI_COMMON_SECTION_HEADER *Section;
UINT32 SectionSize;
UINT32 Index;
if (IS_FFS_FILE2 (FileHeader)) {
FileSize = FFS_FILE2_SIZE (FileHeader);
} else {
FileSize = FFS_FILE_SIZE (FileHeader);
}
FileSize -= sizeof (EFI_FFS_FILE_HEADER);
Section = (EFI_COMMON_SECTION_HEADER *)(FileHeader + 1);
Index = 0;
while (Index < FileSize) {
if (Section->Type == SectionType) {
if (IS_SECTION2 (Section)) {
*SectionData = (VOID *)((UINT8 *) Section + sizeof (EFI_COMMON_SECTION_HEADER2));
} else {
*SectionData = (VOID *)((UINT8 *) Section + sizeof (EFI_COMMON_SECTION_HEADER));
}
return EFI_SUCCESS;
}
if (IS_SECTION2 (Section)) {
SectionSize = SECTION2_SIZE (Section);
} else {
SectionSize = SECTION_SIZE (Section);
}
SectionSize = GET_OCCUPIED_SIZE (SectionSize, 4);
ASSERT (SectionSize != 0);
Index += SectionSize;
Section = (EFI_COMMON_SECTION_HEADER *)((UINT8 *)Section + SectionSize);
}
return EFI_NOT_FOUND;
}
/**
Find DXE core from FV and build DXE core HOBs.
@param[out] DxeCoreEntryPoint DXE core entry point
@retval EFI_SUCCESS If it completed successfully.
@retval EFI_NOT_FOUND If it failed to load DXE FV.
**/
EFI_STATUS
LoadDxeCore (
OUT PHYSICAL_ADDRESS *DxeCoreEntryPoint
)
{
EFI_STATUS Status;
EFI_FIRMWARE_VOLUME_HEADER *PayloadFv;
EFI_FIRMWARE_VOLUME_HEADER *DxeCoreFv;
EFI_FFS_FILE_HEADER *FileHeader;
VOID *PeCoffImage;
EFI_PHYSICAL_ADDRESS ImageAddress;
UINT64 ImageSize;
PayloadFv = (EFI_FIRMWARE_VOLUME_HEADER *)(UINTN)PcdGet32 (PcdPayloadFdMemBase);
//
// DXE FV is inside Payload FV. Here find DXE FV from Payload FV
//
Status = FvFindFileByTypeGuid (PayloadFv, EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE, NULL, &FileHeader);
if (EFI_ERROR (Status)) {
return Status;
}
Status = FileFindSection (FileHeader, EFI_SECTION_FIRMWARE_VOLUME_IMAGE, (VOID **)&DxeCoreFv);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Report DXE FV to DXE core
//
BuildFvHob ((EFI_PHYSICAL_ADDRESS) (UINTN) DxeCoreFv, DxeCoreFv->FvLength);
//
// Find DXE core file from DXE FV
//
Status = FvFindFileByTypeGuid (DxeCoreFv, EFI_FV_FILETYPE_DXE_CORE, NULL, &FileHeader);
if (EFI_ERROR (Status)) {
return Status;
}
Status = FileFindSection (FileHeader, EFI_SECTION_PE32, (VOID **)&PeCoffImage);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Get DXE core info
//
Status = LoadPeCoffImage (PeCoffImage, &ImageAddress, &ImageSize, DxeCoreEntryPoint);
if (EFI_ERROR (Status)) {
return Status;
}
BuildModuleHob (&FileHeader->Name, ImageAddress, EFI_SIZE_TO_PAGES ((UINT32) ImageSize) * EFI_PAGE_SIZE, *DxeCoreEntryPoint);
return EFI_SUCCESS;
}
/**
Find DXE core from FV and build DXE core HOBs.
@param[in] DxeFv The FV where to find the DXE core.
@param[out] DxeCoreEntryPoint DXE core entry point
@retval EFI_SUCCESS If it completed successfully.
@retval EFI_NOT_FOUND If it failed to load DXE FV.
**/
EFI_STATUS
UniversalLoadDxeCore (
IN EFI_FIRMWARE_VOLUME_HEADER *DxeFv,
OUT PHYSICAL_ADDRESS *DxeCoreEntryPoint
)
{
EFI_STATUS Status;
EFI_FFS_FILE_HEADER *FileHeader;
VOID *PeCoffImage;
EFI_PHYSICAL_ADDRESS ImageAddress;
UINT64 ImageSize;
//
// Find DXE core file from DXE FV
//
Status = FvFindFileByTypeGuid (DxeFv, EFI_FV_FILETYPE_DXE_CORE, NULL, &FileHeader);
if (EFI_ERROR (Status)) {
return Status;
}
Status = FileFindSection (FileHeader, EFI_SECTION_PE32, (VOID **)&PeCoffImage);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Get DXE core info
//
Status = LoadPeCoffImage (PeCoffImage, &ImageAddress, &ImageSize, DxeCoreEntryPoint);
if (EFI_ERROR (Status)) {
return Status;
}
BuildModuleHob (&FileHeader->Name, ImageAddress, EFI_SIZE_TO_PAGES ((UINT32) ImageSize) * EFI_PAGE_SIZE, *DxeCoreEntryPoint);
return EFI_SUCCESS;
}
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