EFI_STATUS
PciRomLoadEfiDriversFromOptionRomTable (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo
)
/*++
Routine Description:
Arguments:
Returns:
--*/
{
EFI_STATUS Status;
EFI_PCI_OPTION_ROM_TABLE *PciOptionRomTable;
EFI_PCI_OPTION_ROM_DESCRIPTOR *PciOptionRomDescriptor;
UINTN Index;
EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Descriptors;
UINT16 MinBus;
UINT16 MaxBus;
Status = EfiGetSystemConfigurationTable (&gEfiPciOptionRomTableGuid, (VOID **) &PciOptionRomTable);
if (EFI_ERROR (Status)) {
return EFI_NOT_FOUND;
}
Status = EFI_NOT_FOUND;
for (Index = 0; Index < PciOptionRomTable->PciOptionRomCount; Index++) {
PciOptionRomDescriptor = &PciOptionRomTable->PciOptionRomDescriptors[Index];
if (!PciOptionRomDescriptor->DontLoadEfiRom) {
if (PciOptionRomDescriptor->Seg == PciRootBridgeIo->SegmentNumber) {
Status = PciRootBridgeIo->Configuration (PciRootBridgeIo, (VOID **) &Descriptors);
if (EFI_ERROR (Status)) {
return Status;
}
PciGetBusRange (&Descriptors, &MinBus, &MaxBus, NULL);
if ((MinBus <= PciOptionRomDescriptor->Bus) && (PciOptionRomDescriptor->Bus <= MaxBus)) {
Status = PciRomLoadEfiDriversFromRomImage (This, PciOptionRomDescriptor);
PciOptionRomDescriptor->DontLoadEfiRom |= 2;
}
}
}
}
return Status;
}
STATIC
VOID
LoadVideoRom (
VOID
)
{
PCI_DATA_STRUCTURE *Pcir;
UINTN RomSize;
//
// The virtual machines sometimes load the video rom image
// directly at the legacy video BIOS location of C000:0000,
// and do not implement the PCI expansion ROM feature.
//
Pcir = (PCI_DATA_STRUCTURE *) (UINTN) 0xc0000;
RomSize = Pcir->ImageLength * 512;
PciRomLoadEfiDriversFromRomImage (0xc0000, RomSize);
}
