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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>
This program and the accompanying materials are
licensed and made available under the terms and conditions of
the BSD License which accompanies this distribution. The full
text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#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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