1 files changed, 51 insertions, 0 deletions
diff --git a/MdePkg/Library/PciSegmentLibSegmentInfo/PciSegmentLibCommon.h b/MdePkg/Library/PciSegmentLibSegmentInfo/PciSegmentLibCommon.h
new file mode 100644
index 000000000000..5b6c08ca8b05
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+++ b/MdePkg/Library/PciSegmentLibSegmentInfo/PciSegmentLibCommon.h
@@ -0,0 +1,51 @@
+/** @file
+  Provide common routines used by BasePciSegmentLibSegmentInfo and
+  DxeRuntimePciSegmentLibSegmentInfo libraries.
+
+  Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef _PCI_SEGMENT_LIB_COMMON_H_
+#define _PCI_SEGMENT_LIB_COMMON_H_
+
+#include <Base.h>
+#include <IndustryStandard/PciExpress21.h>
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/IoLib.h>
+#include <Library/PciSegmentLib.h>
+#include <Library/PciSegmentInfoLib.h>
+
+/**
+  Return the linear address for the physical address.
+
+  @param  Address  The physical address.
+
+  @retval The linear address.
+**/
+UINTN
+PciSegmentLibVirtualAddress (
+  IN UINTN                     Address
+  );
+
+/**
+  Internal function that converts PciSegmentLib format address that encodes the PCI Bus, Device,
+  Function and Register to ECAM (Enhanced Configuration Access Mechanism) address.
+
+  @param Address     The address that encodes the PCI Bus, Device, Function and
+                     Register.
+  @param SegmentInfo An array of PCI_SEGMENT_INFO holding the segment information.
+  @param Count       Number of segments.
+
+  @retval ECAM address.
+**/
+UINTN
+PciSegmentLibGetEcamAddress (
+  IN UINT64                    Address,
+  IN CONST PCI_SEGMENT_INFO    *SegmentInfo,
+  IN UINTN                     Count
+  );
+
+#endif