/** @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; | |
} |