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