1 files changed, 64 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/PciSegmentLibSegmentInfo/BasePciSegmentLib.c b/roms/edk2/MdePkg/Library/PciSegmentLibSegmentInfo/BasePciSegmentLib.c
new file mode 100644
index 000000000..b0d51c45b
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/PciSegmentLibSegmentInfo/BasePciSegmentLib.c
@@ -0,0 +1,64 @@
+/** @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;
+}