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/** @file
Instance of Base PCI Segment Library that support multi-segment PCI configuration access.
PCI Segment Library that consumes segment information provided by PciSegmentInfoLib to
support multi-segment PCI configuration access through enhanced configuration access mechanism.
Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "PciSegmentLibCommon.h"
/**
Return the virtual address for the physical address.
@param Address The physical address.
@retval The virtual address.
**/
UINTN
PciSegmentLibVirtualAddress (
IN UINTN Address
)
{
return Address;
}
/**
Register a PCI device so PCI configuration registers may be accessed after
SetVirtualAddressMap().
If any reserved bits in Address are set, then ASSERT().
@param Address The address that encodes the PCI Bus, Device, Function and
Register.
@retval RETURN_SUCCESS The PCI device was registered for runtime access.
@retval RETURN_UNSUPPORTED An attempt was made to call this function
after ExitBootServices().
@retval RETURN_UNSUPPORTED The resources required to access the PCI device
at runtime could not be mapped.
@retval RETURN_OUT_OF_RESOURCES There are not enough resources available to
complete the registration.
**/
RETURN_STATUS
EFIAPI
PciSegmentRegisterForRuntimeAccess (
IN UINTN Address
)
{
//
// Use PciSegmentLibGetEcamAddress() to validate the Address.
//
DEBUG_CODE (
UINTN Count;
PCI_SEGMENT_INFO *SegmentInfo;
SegmentInfo = GetPciSegmentInfo (&Count);
PciSegmentLibGetEcamAddress (Address, SegmentInfo, Count);
);
return RETURN_SUCCESS;
}
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