mirror of https://github.com/acidanthera/audk.git
144 lines
4.4 KiB
C
144 lines
4.4 KiB
C
/** @file
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Functions implementation for Bus Specific Driver Override protoocl.
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Copyright (c) 2006 - 2009, 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 "PciBus.h"
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/**
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Initializes a PCI Driver Override Instance.
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@param PciIoDevice PCI Device instance.
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**/
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VOID
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InitializePciDriverOverrideInstance (
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IN OUT PCI_IO_DEVICE *PciIoDevice
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)
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{
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PciIoDevice->PciDriverOverride.GetDriver = GetDriver;
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}
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/**
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Uses a bus specific algorithm to retrieve a driver image handle for a controller.
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@param This A pointer to the EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL instance.
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@param DriverImageHandle On input, a pointer to the previous driver image handle returned
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by GetDriver(). On output, a pointer to the next driver
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image handle. Passing in a NULL, will return the first driver
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image handle.
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@retval EFI_SUCCESS A bus specific override driver is returned in DriverImageHandle.
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@retval EFI_NOT_FOUND The end of the list of override drivers was reached.
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A bus specific override driver is not returned in DriverImageHandle.
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@retval EFI_INVALID_PARAMETER DriverImageHandle is not a handle that was returned on a
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previous call to GetDriver().
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**/
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EFI_STATUS
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EFIAPI
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GetDriver (
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IN EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL *This,
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IN OUT EFI_HANDLE *DriverImageHandle
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)
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{
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PCI_IO_DEVICE *PciIoDevice;
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LIST_ENTRY *CurrentLink;
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PCI_DRIVER_OVERRIDE_LIST *Node;
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PciIoDevice = PCI_IO_DEVICE_FROM_PCI_DRIVER_OVERRIDE_THIS (This);
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CurrentLink = PciIoDevice->OptionRomDriverList.ForwardLink;
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while (CurrentLink != NULL && CurrentLink != &PciIoDevice->OptionRomDriverList) {
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Node = DRIVER_OVERRIDE_FROM_LINK (CurrentLink);
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if (*DriverImageHandle == NULL) {
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*DriverImageHandle = Node->DriverImageHandle;
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return EFI_SUCCESS;
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}
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if (*DriverImageHandle == Node->DriverImageHandle) {
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if (CurrentLink->ForwardLink == &PciIoDevice->OptionRomDriverList ||
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CurrentLink->ForwardLink == NULL) {
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return EFI_NOT_FOUND;
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}
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//
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// Get next node
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//
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Node = DRIVER_OVERRIDE_FROM_LINK (CurrentLink->ForwardLink);
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*DriverImageHandle = Node->DriverImageHandle;
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return EFI_SUCCESS;
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}
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CurrentLink = CurrentLink->ForwardLink;
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}
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return EFI_INVALID_PARAMETER;
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}
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/**
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Add an overriding driver image.
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@param PciIoDevice Instance of PciIo device.
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@param DriverImageHandle new added driver image.
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@retval EFI_SUCCESS Successfully added driver.
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@retval EFI_OUT_OF_RESOURCES No memory resource for new driver instance.
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@retval other Some error occurred when locating gEfiLoadedImageProtocolGuid.
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**/
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EFI_STATUS
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AddDriver (
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IN PCI_IO_DEVICE *PciIoDevice,
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IN EFI_HANDLE DriverImageHandle
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)
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{
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EFI_STATUS Status;
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EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;
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PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;
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PCI_DRIVER_OVERRIDE_LIST *Node;
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Status = gBS->HandleProtocol (DriverImageHandle, &gEfiLoadedImageProtocolGuid, (VOID **) &LoadedImage);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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Node = AllocatePool (sizeof (PCI_DRIVER_OVERRIDE_LIST));
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if (Node == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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Node->Signature = DRIVER_OVERRIDE_SIGNATURE;
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Node->DriverImageHandle = DriverImageHandle;
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InsertTailList (&PciIoDevice->OptionRomDriverList, &(Node->Link));
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PciIoDevice->BusOverride = TRUE;
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ImageContext.Handle = LoadedImage->ImageBase;
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ImageContext.ImageRead = PeCoffLoaderImageReadFromMemory;
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//
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// Get information about the image
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//
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PeCoffLoaderGetImageInfo (&ImageContext);
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return EFI_SUCCESS;
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}
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