tyler.durden
/
audk
mirror of https://github.com/acidanthera/audk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
audk/MdeModulePkg/Bus/Pci/PciBusDxe/PciOptionRomSupport.c

784 lines
24 KiB
C
Raw Blame History

/** @file
PCI Rom supporting funtions implementation for PCI Bus module.
Copyright (c) 2006 - 2015, 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 "PciBus.h"
/**
Load the EFI Image from Option ROM
@param PciIoDevice PCI IO device instance.
@param FilePath The file path of the EFI Image
@param BufferSize On input the size of Buffer in bytes. On output with a return
code of EFI_SUCCESS, the amount of data transferred to Buffer.
On output with a return code of EFI_BUFFER_TOO_SMALL,
the size of Buffer required to retrieve the requested file.
@param Buffer The memory buffer to transfer the file to. If Buffer is NULL,
then no the size of the requested file is returned in BufferSize.
@retval EFI_SUCCESS The file was loaded.
@retval EFI_INVALID_PARAMETER FilePath is not a valid device path, or
BufferSize is NULL.
@retval EFI_NOT_FOUND Not found PCI Option Rom on PCI device.
@retval EFI_DEVICE_ERROR Failed to decompress PCI Option Rom image.
@retval EFI_BUFFER_TOO_SMALL The BufferSize is too small to read the current directory entry.
BufferSize has been updated with the size needed to complete the request.
**/
EFI_STATUS
LocalLoadFile2 (
IN PCI_IO_DEVICE *PciIoDevice,
IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
IN OUT UINTN *BufferSize,
IN VOID *Buffer OPTIONAL
)
{
EFI_STATUS Status;
MEDIA_RELATIVE_OFFSET_RANGE_DEVICE_PATH *EfiOpRomImageNode;
EFI_PCI_EXPANSION_ROM_HEADER *EfiRomHeader;
PCI_DATA_STRUCTURE *Pcir;
UINT32 ImageSize;
UINT8 *ImageBuffer;
UINT32 ImageLength;
UINT32 DestinationSize;
UINT32 ScratchSize;
VOID *Scratch;
EFI_DECOMPRESS_PROTOCOL *Decompress;
UINT32 InitializationSize;
EfiOpRomImageNode = (MEDIA_RELATIVE_OFFSET_RANGE_DEVICE_PATH *) FilePath;
if ((EfiOpRomImageNode == NULL) ||
(DevicePathType (FilePath) != MEDIA_DEVICE_PATH) ||
(DevicePathSubType (FilePath) != MEDIA_RELATIVE_OFFSET_RANGE_DP) ||
(DevicePathNodeLength (FilePath) != sizeof (MEDIA_RELATIVE_OFFSET_RANGE_DEVICE_PATH)) ||
(!IsDevicePathEnd (NextDevicePathNode (FilePath))) ||
(EfiOpRomImageNode->StartingOffset > EfiOpRomImageNode->EndingOffset) ||
(EfiOpRomImageNode->EndingOffset >= PciIoDevice->RomSize) ||
(BufferSize == NULL)
) {
return EFI_INVALID_PARAMETER;
}
EfiRomHeader = (EFI_PCI_EXPANSION_ROM_HEADER *) (
(UINT8 *) PciIoDevice->PciIo.RomImage + EfiOpRomImageNode->StartingOffset
);
if (EfiRomHeader->Signature != PCI_EXPANSION_ROM_HEADER_SIGNATURE) {
return EFI_NOT_FOUND;
}
Pcir = (PCI_DATA_STRUCTURE *) ((UINT8 *) EfiRomHeader + EfiRomHeader->PcirOffset);
ASSERT (Pcir->Signature == PCI_DATA_STRUCTURE_SIGNATURE);
if ((Pcir->CodeType == PCI_CODE_TYPE_EFI_IMAGE) &&
(EfiRomHeader->EfiSignature == EFI_PCI_EXPANSION_ROM_HEADER_EFISIGNATURE) &&
((EfiRomHeader->EfiSubsystem == EFI_IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER) ||
(EfiRomHeader->EfiSubsystem == EFI_IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER)) &&
(EfiRomHeader->CompressionType <= EFI_PCI_EXPANSION_ROM_HEADER_COMPRESSED)
) {
ImageSize = Pcir->ImageLength * 512;
InitializationSize = (UINT32) EfiRomHeader->InitializationSize * 512;
if (InitializationSize > ImageSize || EfiRomHeader->EfiImageHeaderOffset >= InitializationSize) {
return EFI_NOT_FOUND;
}
ImageBuffer = (UINT8 *) EfiRomHeader + EfiRomHeader->EfiImageHeaderOffset;
ImageLength = InitializationSize - EfiRomHeader->EfiImageHeaderOffset;
if (EfiRomHeader->CompressionType != EFI_PCI_EXPANSION_ROM_HEADER_COMPRESSED) {
//
// Uncompressed: Copy the EFI Image directly to user's buffer
//
if (Buffer == NULL || *BufferSize < ImageLength) {
*BufferSize = ImageLength;
return EFI_BUFFER_TOO_SMALL;
}
*BufferSize = ImageLength;
CopyMem (Buffer, ImageBuffer, ImageLength);
return EFI_SUCCESS;
} else {
//
// Compressed: Uncompress before copying
//
Status = gBS->LocateProtocol (&gEfiDecompressProtocolGuid, NULL, (VOID **) &Decompress);
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
Status = Decompress->GetInfo (
Decompress,
ImageBuffer,
ImageLength,
&DestinationSize,
&ScratchSize
);
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
if (Buffer == NULL || *BufferSize < DestinationSize) {
*BufferSize = DestinationSize;
return EFI_BUFFER_TOO_SMALL;
}
*BufferSize = DestinationSize;
Scratch = AllocatePool (ScratchSize);
if (Scratch == NULL) {
return EFI_DEVICE_ERROR;
}
Status = Decompress->Decompress (
Decompress,
ImageBuffer,
ImageLength,
Buffer,
DestinationSize,
Scratch,
ScratchSize
);
FreePool (Scratch);
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}
/**
Initialize a PCI LoadFile2 instance.
@param PciIoDevice PCI IO Device.
**/
VOID
InitializePciLoadFile2 (
IN PCI_IO_DEVICE *PciIoDevice
)
{
PciIoDevice->LoadFile2.LoadFile = LoadFile2;
}
/**
Causes the driver to load a specified file.
@param This Indicates a pointer to the calling context.
@param FilePath The device specific path of the file to load.
@param BootPolicy Should always be FALSE.
@param BufferSize On input the size of Buffer in bytes. On output with a return
code of EFI_SUCCESS, the amount of data transferred to Buffer.
On output with a return code of EFI_BUFFER_TOO_SMALL,
the size of Buffer required to retrieve the requested file.
@param Buffer The memory buffer to transfer the file to. If Buffer is NULL,
then no the size of the requested file is returned in BufferSize.
@retval EFI_SUCCESS The file was loaded.
@retval EFI_UNSUPPORTED BootPolicy is TRUE.
@retval EFI_INVALID_PARAMETER FilePath is not a valid device path, or
BufferSize is NULL.
@retval EFI_NOT_FOUND Not found PCI Option Rom on PCI device.
@retval EFI_DEVICE_ERROR Failed to decompress PCI Option Rom image.
@retval EFI_BUFFER_TOO_SMALL The BufferSize is too small to read the current directory entry.
BufferSize has been updated with the size needed to complete the request.
**/
EFI_STATUS
EFIAPI
LoadFile2 (
IN EFI_LOAD_FILE2_PROTOCOL *This,
IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
IN BOOLEAN BootPolicy,
IN OUT UINTN *BufferSize,
IN VOID *Buffer OPTIONAL
)
{
PCI_IO_DEVICE *PciIoDevice;
if (BootPolicy) {
return EFI_UNSUPPORTED;
}
PciIoDevice = PCI_IO_DEVICE_FROM_LOAD_FILE2_THIS (This);
return LocalLoadFile2 (
PciIoDevice,
FilePath,
BufferSize,
Buffer
);
}
/**
Get Pci device's oprom information.
@param PciIoDevice Input Pci device instance.
Output Pci device instance with updated OptionRom size.
@retval EFI_NOT_FOUND Pci device has not Option Rom.
@retval EFI_SUCCESS Pci device has Option Rom.
**/
EFI_STATUS
GetOpRomInfo (
IN OUT PCI_IO_DEVICE *PciIoDevice
)
{
UINT8 RomBarIndex;
UINT32 AllOnes;
UINT64 Address;
EFI_STATUS Status;
UINT8 Bus;
UINT8 Device;
UINT8 Function;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
Bus = PciIoDevice->BusNumber;
Device = PciIoDevice->DeviceNumber;
Function = PciIoDevice->FunctionNumber;
PciRootBridgeIo = PciIoDevice->PciRootBridgeIo;
//
// Offset is 0x30 if is not ppb
//
//
// 0x30
//
RomBarIndex = PCI_EXPANSION_ROM_BASE;
if (IS_PCI_BRIDGE (&PciIoDevice->Pci)) {
//
// If is ppb, 0x38
//
RomBarIndex = PCI_BRIDGE_ROMBAR;
}
//
// The bit0 is 0 to prevent the enabling of the Rom address decoder
//
AllOnes = 0xfffffffe;
Address = EFI_PCI_ADDRESS (Bus, Device, Function, RomBarIndex);
Status = PciRootBridgeIo->Pci.Write (
PciRootBridgeIo,
EfiPciWidthUint32,
Address,
1,
&AllOnes
);
if (EFI_ERROR (Status)) {
return EFI_NOT_FOUND;
}
//
// Read back
//
Status = PciRootBridgeIo->Pci.Read(
PciRootBridgeIo,
EfiPciWidthUint32,
Address,
1,
&AllOnes
);
if (EFI_ERROR (Status)) {
return EFI_NOT_FOUND;
}
//
// Bits [1, 10] are reserved
//
AllOnes &= 0xFFFFF800;
if ((AllOnes == 0) || (AllOnes == 0xFFFFF800)) {
return EFI_NOT_FOUND;
}
PciIoDevice->RomSize = (UINT64) ((~AllOnes) + 1);
return EFI_SUCCESS;
}
/**
Check if the RomImage contains EFI Images.
@param RomImage The ROM address of Image for check.
@param RomSize Size of ROM for check.
@retval TRUE ROM contain EFI Image.
@retval FALSE ROM not contain EFI Image.
**/
BOOLEAN
ContainEfiImage (
IN VOID *RomImage,
IN UINT64 RomSize
)
{
PCI_EXPANSION_ROM_HEADER *RomHeader;
PCI_DATA_STRUCTURE *RomPcir;
UINT8 Indicator;
Indicator = 0;
RomHeader = RomImage;
if (RomHeader == NULL) {
return FALSE;
}
do {
if (RomHeader->Signature != PCI_EXPANSION_ROM_HEADER_SIGNATURE) {
RomHeader = (PCI_EXPANSION_ROM_HEADER *) ((UINT8 *) RomHeader + 512);
continue;
}
//
// The PCI Data Structure must be DWORD aligned.
//
if (RomHeader->PcirOffset == 0 ||
(RomHeader->PcirOffset & 3) != 0 ||
(UINT8 *) RomHeader + RomHeader->PcirOffset + sizeof (PCI_DATA_STRUCTURE) > (UINT8 *) RomImage + RomSize) {
break;
}
RomPcir = (PCI_DATA_STRUCTURE *) ((UINT8 *) RomHeader + RomHeader->PcirOffset);
if (RomPcir->Signature != PCI_DATA_STRUCTURE_SIGNATURE) {
break;
}
if (RomPcir->CodeType == PCI_CODE_TYPE_EFI_IMAGE) {
return TRUE;
}
Indicator = RomPcir->Indicator;
RomHeader = (PCI_EXPANSION_ROM_HEADER *) ((UINT8 *) RomHeader + RomPcir->ImageLength * 512);
} while (((UINT8 *) RomHeader < (UINT8 *) RomImage + RomSize) && ((Indicator & 0x80) == 0x00));
return FALSE;
}
/**
Load Option Rom image for specified PCI device.
@param PciDevice Pci device instance.
@param RomBase Base address of Option Rom.
@retval EFI_OUT_OF_RESOURCES No enough memory to hold image.
@retval EFI_SUCESS Successfully loaded Option Rom.
**/
EFI_STATUS
LoadOpRomImage (
IN PCI_IO_DEVICE *PciDevice,
IN UINT64 RomBase
)
{
UINT8 RomBarIndex;
UINT8 Indicator;
UINT16 OffsetPcir;
UINT32 RomBarOffset;
UINT32 RomBar;
EFI_STATUS RetStatus;
BOOLEAN FirstCheck;
UINT8 *Image;
PCI_EXPANSION_ROM_HEADER *RomHeader;
PCI_DATA_STRUCTURE *RomPcir;
UINT64 RomSize;
UINT64 RomImageSize;
UINT32 LegacyImageLength;
UINT8 *RomInMemory;
UINT8 CodeType;
RomSize = PciDevice->RomSize;
Indicator = 0;
RomImageSize = 0;
RomInMemory = NULL;
CodeType = 0xFF;
//
// Get the RomBarIndex
//
//
// 0x30
//
RomBarIndex = PCI_EXPANSION_ROM_BASE;
if (IS_PCI_BRIDGE (&(PciDevice->Pci))) {
//
// if is ppb
//
//
// 0x38
//
RomBarIndex = PCI_BRIDGE_ROMBAR;
}
//
// Allocate memory for Rom header and PCIR
//
RomHeader = AllocatePool (sizeof (PCI_EXPANSION_ROM_HEADER));
if (RomHeader == NULL) {
return EFI_OUT_OF_RESOURCES;
}
RomPcir = AllocatePool (sizeof (PCI_DATA_STRUCTURE));
if (RomPcir == NULL) {
FreePool (RomHeader);
return EFI_OUT_OF_RESOURCES;
}
RomBar = (UINT32) RomBase;
//
// Enable RomBar
//
RomDecode (PciDevice, RomBarIndex, RomBar, TRUE);
RomBarOffset = RomBar;
RetStatus = EFI_NOT_FOUND;
FirstCheck = TRUE;
LegacyImageLength = 0;
do {
PciDevice->PciRootBridgeIo->Mem.Read (
PciDevice->PciRootBridgeIo,
EfiPciWidthUint8,
RomBarOffset,
sizeof (PCI_EXPANSION_ROM_HEADER),
(UINT8 *) RomHeader
);
if (RomHeader->Signature != PCI_EXPANSION_ROM_HEADER_SIGNATURE) {
RomBarOffset = RomBarOffset + 512;
if (FirstCheck) {
break;
} else {
RomImageSize = RomImageSize + 512;
continue;
}
}
FirstCheck = FALSE;
OffsetPcir = RomHeader->PcirOffset;
//
// If the pointer to the PCI Data Structure is invalid, no further images can be located.
// The PCI Data Structure must be DWORD aligned.
//
if (OffsetPcir == 0 ||
(OffsetPcir & 3) != 0 ||
RomImageSize + OffsetPcir + sizeof (PCI_DATA_STRUCTURE) > RomSize) {
break;
}
PciDevice->PciRootBridgeIo->Mem.Read (
PciDevice->PciRootBridgeIo,
EfiPciWidthUint8,
RomBarOffset + OffsetPcir,
sizeof (PCI_DATA_STRUCTURE),
(UINT8 *) RomPcir
);
//
// If a valid signature is not present in the PCI Data Structure, no further images can be located.
//
if (RomPcir->Signature != PCI_DATA_STRUCTURE_SIGNATURE) {
break;
}
if (RomImageSize + RomPcir->ImageLength * 512 > RomSize) {
break;
}
if (RomPcir->CodeType == PCI_CODE_TYPE_PCAT_IMAGE) {
CodeType = PCI_CODE_TYPE_PCAT_IMAGE;
LegacyImageLength = ((UINT32)((EFI_LEGACY_EXPANSION_ROM_HEADER *)RomHeader)->Size512) * 512;
}
Indicator = RomPcir->Indicator;
RomImageSize = RomImageSize + RomPcir->ImageLength * 512;
RomBarOffset = RomBarOffset + RomPcir->ImageLength * 512;
} while (((Indicator & 0x80) == 0x00) && ((RomBarOffset - RomBar) < RomSize));
//
// Some Legacy Cards do not report the correct ImageLength so used the maximum
// of the legacy length and the PCIR Image Length
//
if (CodeType == PCI_CODE_TYPE_PCAT_IMAGE) {
RomImageSize = MAX (RomImageSize, LegacyImageLength);
}
if (RomImageSize > 0) {
RetStatus = EFI_SUCCESS;
Image = AllocatePool ((UINT32) RomImageSize);
if (Image == NULL) {
RomDecode (PciDevice, RomBarIndex, RomBar, FALSE);
FreePool (RomHeader);
FreePool (RomPcir);
return EFI_OUT_OF_RESOURCES;
}
//
// Copy Rom image into memory
//
PciDevice->PciRootBridgeIo->Mem.Read (
PciDevice->PciRootBridgeIo,
EfiPciWidthUint8,
RomBar,
(UINT32) RomImageSize,
Image
);
RomInMemory = Image;
}
RomDecode (PciDevice, RomBarIndex, RomBar, FALSE);
PciDevice->EmbeddedRom = TRUE;
PciDevice->PciIo.RomSize = RomImageSize;
PciDevice->PciIo.RomImage = RomInMemory;
//
// For OpROM read from PCI device:
// Add the Rom Image to internal database for later PCI light enumeration
//
PciRomAddImageMapping (
NULL,
PciDevice->PciRootBridgeIo->SegmentNumber,
PciDevice->BusNumber,
PciDevice->DeviceNumber,
PciDevice->FunctionNumber,
(UINT64) (UINTN) PciDevice->PciIo.RomImage,
PciDevice->PciIo.RomSize
);
//
// Free allocated memory
//
FreePool (RomHeader);
FreePool (RomPcir);
return RetStatus;
}
/**
Enable/Disable Option Rom decode.
@param PciDevice Pci device instance.
@param RomBarIndex The BAR index of the standard PCI Configuration header to use as the
base address for resource range. The legal range for this field is 0..5.
@param RomBar Base address of Option Rom.
@param Enable Flag for enable/disable decode.
**/
VOID
RomDecode (
IN PCI_IO_DEVICE *PciDevice,
IN UINT8 RomBarIndex,
IN UINT32 RomBar,
IN BOOLEAN Enable
)
{
UINT32 Value32;
UINT32 Offset;
UINT32 OffsetMax;
EFI_PCI_IO_PROTOCOL *PciIo;
PciIo = &PciDevice->PciIo;
if (Enable) {
//
// Clear all bars
//
OffsetMax = 0x24;
if (IS_PCI_BRIDGE(&PciDevice->Pci)) {
OffsetMax = 0x14;
}
for (Offset = 0x10; Offset <= OffsetMax; Offset += sizeof (UINT32)) {
PciIo->Pci.Write (PciIo, EfiPciIoWidthUint32, Offset, 1, &gAllZero);
}
//
// set the Rom base address: now is hardcode
// enable its decoder
//
Value32 = RomBar | 0x1;
PciIo->Pci.Write (
PciIo,
(EFI_PCI_IO_PROTOCOL_WIDTH) EfiPciWidthUint32,
RomBarIndex,
1,
&Value32
);
//
// Programe all upstream bridge
//
ProgrameUpstreamBridgeForRom(PciDevice, RomBar, TRUE);
//
// Setting the memory space bit in the function's command register
//
PCI_ENABLE_COMMAND_REGISTER(PciDevice, EFI_PCI_COMMAND_MEMORY_SPACE);
} else {
//
// disable command register decode to memory
//
PCI_DISABLE_COMMAND_REGISTER(PciDevice, EFI_PCI_COMMAND_MEMORY_SPACE);
//
// Destroy the programmed bar in all the upstream bridge.
//
ProgrameUpstreamBridgeForRom(PciDevice, RomBar, FALSE);
//
// disable rom decode
//
Value32 = 0xFFFFFFFE;
PciIo->Pci.Write (
PciIo,
(EFI_PCI_IO_PROTOCOL_WIDTH) EfiPciWidthUint32,
RomBarIndex,
1,
&Value32
);
}
}
/**
Load and start the Option Rom image.
@param PciDevice Pci device instance.
@retval EFI_SUCCESS Successfully loaded and started PCI Option Rom image.
@retval EFI_NOT_FOUND Failed to process PCI Option Rom image.
**/
EFI_STATUS
ProcessOpRomImage (
IN PCI_IO_DEVICE *PciDevice
)
{
UINT8 Indicator;
UINT32 ImageSize;
VOID *RomBar;
UINT8 *RomBarOffset;
EFI_HANDLE ImageHandle;
EFI_STATUS Status;
EFI_STATUS RetStatus;
EFI_PCI_EXPANSION_ROM_HEADER *EfiRomHeader;
PCI_DATA_STRUCTURE *Pcir;
EFI_DEVICE_PATH_PROTOCOL *PciOptionRomImageDevicePath;
MEDIA_RELATIVE_OFFSET_RANGE_DEVICE_PATH EfiOpRomImageNode;
VOID *Buffer;
UINTN BufferSize;
Indicator = 0;
//
// Get the Address of the Option Rom image
//
RomBar = PciDevice->PciIo.RomImage;
RomBarOffset = (UINT8 *) RomBar;
RetStatus = EFI_NOT_FOUND;
if (RomBar == NULL) {
return RetStatus;
}
ASSERT (((EFI_PCI_EXPANSION_ROM_HEADER *) RomBarOffset)->Signature == PCI_EXPANSION_ROM_HEADER_SIGNATURE);
do {
EfiRomHeader = (EFI_PCI_EXPANSION_ROM_HEADER *) RomBarOffset;
if (EfiRomHeader->Signature != PCI_EXPANSION_ROM_HEADER_SIGNATURE) {
RomBarOffset += 512;
continue;
}
Pcir = (PCI_DATA_STRUCTURE *) (RomBarOffset + EfiRomHeader->PcirOffset);
ASSERT (Pcir->Signature == PCI_DATA_STRUCTURE_SIGNATURE);
ImageSize = (UINT32) (Pcir->ImageLength * 512);
Indicator = Pcir->Indicator;
//
// Skip the image if it is not an EFI PCI Option ROM image
//
if (Pcir->CodeType != PCI_CODE_TYPE_EFI_IMAGE) {
goto NextImage;
}
//
// Skip the EFI PCI Option ROM image if its machine type is not supported
//
if (!EFI_IMAGE_MACHINE_TYPE_SUPPORTED (EfiRomHeader->EfiMachineType)) {
goto NextImage;
}
//
// Ignore the EFI PCI Option ROM image if it is an EFI application
//
if (EfiRomHeader->EfiSubsystem == EFI_IMAGE_SUBSYSTEM_EFI_APPLICATION) {
goto NextImage;
}
//
// Create Pci Option Rom Image device path header
//
EfiOpRomImageNode.Header.Type = MEDIA_DEVICE_PATH;
EfiOpRomImageNode.Header.SubType = MEDIA_RELATIVE_OFFSET_RANGE_DP;
SetDevicePathNodeLength (&EfiOpRomImageNode.Header, sizeof (EfiOpRomImageNode));
EfiOpRomImageNode.StartingOffset = (UINTN) RomBarOffset - (UINTN) RomBar;
EfiOpRomImageNode.EndingOffset = (UINTN) RomBarOffset + ImageSize - 1 - (UINTN) RomBar;
PciOptionRomImageDevicePath = AppendDevicePathNode (PciDevice->DevicePath, &EfiOpRomImageNode.Header);
ASSERT (PciOptionRomImageDevicePath != NULL);
//
// load image and start image
//
BufferSize = 0;
Buffer = NULL;
ImageHandle = NULL;
Status = gBS->LoadImage (
FALSE,
gPciBusDriverBinding.DriverBindingHandle,
PciOptionRomImageDevicePath,
Buffer,
BufferSize,
&ImageHandle
);
FreePool (PciOptionRomImageDevicePath);
if (!EFI_ERROR (Status)) {
Status = gBS->StartImage (ImageHandle, NULL, NULL);
if (!EFI_ERROR (Status)) {
AddDriver (PciDevice, ImageHandle);
PciRomAddImageMapping (
ImageHandle,
PciDevice->PciRootBridgeIo->SegmentNumber,
PciDevice->BusNumber,
PciDevice->DeviceNumber,
PciDevice->FunctionNumber,
(UINT64) (UINTN) PciDevice->PciIo.RomImage,
PciDevice->PciIo.RomSize
);
RetStatus = EFI_SUCCESS;
}
}
NextImage:
RomBarOffset += ImageSize;
} while (((Indicator & 0x80) == 0x00) && ((UINTN) (RomBarOffset - (UINT8 *) RomBar) < PciDevice->RomSize));
return RetStatus;
}
Reference in New Issue View Git Blame Copy Permalink