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/** @file
Provide common utility functions to PciHostBridgeLib instances in
ArmVirtPkg and OvmfPkg.
Copyright (C) 2016, Red Hat, Inc.
Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2020, Huawei Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __PCI_HOST_BRIDGE_UTILITY_LIB_H__
#define __PCI_HOST_BRIDGE_UTILITY_LIB_H__
#include <Library/PciHostBridgeLib.h>
/**
Utility function to initialize a PCI_ROOT_BRIDGE structure.
@param[in] Supports Supported attributes.
@param[in] Attributes Initial attributes.
@param[in] AllocAttributes Allocation attributes.
@param[in] DmaAbove4G DMA above 4GB memory.
@param[in] NoExtendedConfigSpace No Extended Config Space.
@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
EFIAPI
PciHostBridgeUtilityInitRootBridge (
IN UINT64 Supports,
IN UINT64 Attributes,
IN UINT64 AllocAttributes,
IN BOOLEAN DmaAbove4G,
IN BOOLEAN NoExtendedConfigSpace,
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
);
/**
Utility function to uninitialize a PCI_ROOT_BRIDGE structure set up with
PciHostBridgeUtilityInitRootBridge().
@param[in] RootBus The PCI_ROOT_BRIDGE structure, allocated by the caller and
initialized with PciHostBridgeUtilityInitRootBridge(),
that should be uninitialized. This function doesn't free
RootBus.
**/
VOID
EFIAPI
PciHostBridgeUtilityUninitRootBridge (
IN PCI_ROOT_BRIDGE *RootBus
);
/**
Utility function to inform the platform that the resource conflict happens.
@param[in] Configuration Pointer to PCI I/O and PCI memory resource
descriptors. The Configuration contains the
resources for all the root bridges. The resource
for each root bridge is terminated with END
descriptor and an additional END is appended
indicating the end of the entire resources. The
resource descriptor field values follow the
description in
EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL
.SubmitResources().
**/
VOID
EFIAPI
PciHostBridgeUtilityResourceConflict (
IN VOID *Configuration
);
#endif // __PCI_HOST_BRIDGE_UTILITY_LIB_H__
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