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/** @file
Copyright (c) 2006, Intel Corporation
All rights reserved. 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"
/**
Initializes a PCI Driver Override Instance.
@param PciIoDevice Device instance.
**/
VOID
InitializePciDriverOverrideInstance (
PCI_IO_DEVICE *PciIoDevice
)
{
PciIoDevice->PciDriverOverride.GetDriver = GetDriver;
}
/**
Get a overriding driver image.
@param This Pointer to instance of EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL.
@param DriverImageHandle Override driver image.
@retval EFI_SUCCESS Success to get driver image handle.
@retval EFI_NOT_FOUND can not find override driver image.
@retval EFI_INVALID_PARAMETER Invalid parameter.
**/
EFI_STATUS
EFIAPI
GetDriver (
IN EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL *This,
IN OUT EFI_HANDLE *DriverImageHandle
)
{
PCI_IO_DEVICE *PciIoDevice;
LIST_ENTRY *CurrentLink;
PCI_DRIVER_OVERRIDE_LIST *Node;
PciIoDevice = PCI_IO_DEVICE_FROM_PCI_DRIVER_OVERRIDE_THIS (This);
CurrentLink = PciIoDevice->OptionRomDriverList.ForwardLink;
while (CurrentLink != NULL && CurrentLink != &PciIoDevice->OptionRomDriverList) {
Node = DRIVER_OVERRIDE_FROM_LINK (CurrentLink);
if (*DriverImageHandle == NULL) {
*DriverImageHandle = Node->DriverImageHandle;
return EFI_SUCCESS;
}
if (*DriverImageHandle == Node->DriverImageHandle) {
if (CurrentLink->ForwardLink == &PciIoDevice->OptionRomDriverList ||
CurrentLink->ForwardLink == NULL) {
return EFI_NOT_FOUND;
}
//
// Get next node
//
Node = DRIVER_OVERRIDE_FROM_LINK (CurrentLink->ForwardLink);
*DriverImageHandle = Node->DriverImageHandle;
return EFI_SUCCESS;
}
CurrentLink = CurrentLink->ForwardLink;
}
return EFI_INVALID_PARAMETER;
}
/**
Add an overriding driver image
@param PciIoDevice Instance of PciIo device.
@param DriverImageHandle new added driver image.
@retval EFI_OUT_OF_RESOURCES no memory resource for new driver instance.
@retval EFI_SUCCESS Success add driver.
**/
EFI_STATUS
AddDriver (
IN PCI_IO_DEVICE *PciIoDevice,
IN EFI_HANDLE DriverImageHandle
)
{
EFI_STATUS Status;
EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;
PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;
PCI_DRIVER_OVERRIDE_LIST *Node;
Status = gBS->HandleProtocol (DriverImageHandle, &gEfiLoadedImageProtocolGuid, (VOID **) &LoadedImage);
if (EFI_ERROR (Status)) {
return Status;
}
Node = AllocatePool (sizeof (PCI_DRIVER_OVERRIDE_LIST));
if (Node == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Node->Signature = DRIVER_OVERRIDE_SIGNATURE;
Node->DriverImageHandle = DriverImageHandle;
InsertTailList (&PciIoDevice->OptionRomDriverList, &(Node->Link));
PciIoDevice->BusOverride = TRUE;
ImageContext.Handle = LoadedImage->ImageBase;
ImageContext.ImageRead = PeCoffLoaderImageReadFromMemory;
//
// Get information about the image
//
Status = PeCoffLoaderGetImageInfo (&ImageContext);
if (EFI_ERROR (Status)) {
return EFI_SUCCESS;
}
if (ImageContext.Machine != EFI_IMAGE_MACHINE_EBC) {
return EFI_SUCCESS;
}
return EFI_SUCCESS;
}
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