69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
/** @file
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Header file of OVMF instance of PciHostBridgeLib.
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Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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PCI_ROOT_BRIDGE *
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ScanForRootBridges (
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UINTN *NumberOfRootBridges
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);
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/**
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Initialize a PCI_ROOT_BRIDGE structure.
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@param[in] Supports Supported attributes.
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@param[in] Attributes Initial attributes.
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@param[in] AllocAttributes Allocation attributes.
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@param[in] RootBusNumber The bus number to store in RootBus.
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@param[in] MaxSubBusNumber The inclusive maximum bus number that can be
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assigned to any subordinate bus found behind any
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PCI bridge hanging off this root bus.
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The caller is repsonsible for ensuring that
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RootBusNumber <= MaxSubBusNumber. If
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RootBusNumber equals MaxSubBusNumber, then the
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root bus has no room for subordinate buses.
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@param[in] Io IO aperture.
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@param[in] Mem MMIO aperture.
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@param[in] MemAbove4G MMIO aperture above 4G.
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@param[in] PMem Prefetchable MMIO aperture.
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@param[in] PMemAbove4G Prefetchable MMIO aperture above 4G.
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@param[out] RootBus The PCI_ROOT_BRIDGE structure (allocated by the
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caller) that should be filled in by this
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function.
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@retval EFI_SUCCESS Initialization successful. A device path
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consisting of an ACPI device path node, with
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UID = RootBusNumber, has been allocated and
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linked into RootBus.
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@retval EFI_OUT_OF_RESOURCES Memory allocation failed.
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**/
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EFI_STATUS
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InitRootBridge (
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IN UINT64 Supports,
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IN UINT64 Attributes,
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IN UINT64 AllocAttributes,
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IN UINT8 RootBusNumber,
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IN UINT8 MaxSubBusNumber,
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IN PCI_ROOT_BRIDGE_APERTURE *Io,
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IN PCI_ROOT_BRIDGE_APERTURE *Mem,
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IN PCI_ROOT_BRIDGE_APERTURE *MemAbove4G,
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IN PCI_ROOT_BRIDGE_APERTURE *PMem,
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IN PCI_ROOT_BRIDGE_APERTURE *PMemAbove4G,
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OUT PCI_ROOT_BRIDGE *RootBus
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);
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