/** @file Header file of OVMF instance of PciHostBridgeLib. Copyright (c) 2019 Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent **/ PCI_ROOT_BRIDGE * ScanForRootBridges ( UINTN *NumberOfRootBridges ); /** Initialize a PCI_ROOT_BRIDGE structure. @param[in] Supports Supported attributes. @param[in] Attributes Initial attributes. @param[in] AllocAttributes Allocation attributes. @param[in] RootBusNumber The bus number to store in RootBus. @param[in] MaxSubBusNumber The inclusive maximum bus number that can be assigned to any subordinate bus found behind any PCI bridge hanging off this root bus. The caller is repsonsible for ensuring that RootBusNumber <= MaxSubBusNumber. If RootBusNumber equals MaxSubBusNumber, then the root bus has no room for subordinate buses. @param[in] Io IO aperture. @param[in] Mem MMIO aperture. @param[in] MemAbove4G MMIO aperture above 4G. @param[in] PMem Prefetchable MMIO aperture. @param[in] PMemAbove4G Prefetchable MMIO aperture above 4G. @param[out] RootBus The PCI_ROOT_BRIDGE structure (allocated by the caller) that should be filled in by this function. @retval EFI_SUCCESS Initialization successful. A device path consisting of an ACPI device path node, with UID = RootBusNumber, has been allocated and linked into RootBus. @retval EFI_OUT_OF_RESOURCES Memory allocation failed. **/ EFI_STATUS InitRootBridge ( IN UINT64 Supports, IN UINT64 Attributes, IN UINT64 AllocAttributes, IN UINT8 RootBusNumber, IN UINT8 MaxSubBusNumber, IN PCI_ROOT_BRIDGE_APERTURE *Io, IN PCI_ROOT_BRIDGE_APERTURE *Mem, IN PCI_ROOT_BRIDGE_APERTURE *MemAbove4G, IN PCI_ROOT_BRIDGE_APERTURE *PMem, IN PCI_ROOT_BRIDGE_APERTURE *PMemAbove4G, OUT PCI_ROOT_BRIDGE *RootBus );