MdePkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / MdePkg / Library / PciSegmentLibSegmentInfo / BasePciSegmentLib.c

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