2 files changed, 95 insertions, 0 deletions
diff --git a/UefiPayloadPkg/Library/PciSegmentInfoLibAcpiBoardInfo/PciSegmentInfoLibAcpiBoardInfo.c b/UefiPayloadPkg/Library/PciSegmentInfoLibAcpiBoardInfo/PciSegmentInfoLibAcpiBoardInfo.c
new file mode 100644
index 0000000000..d37c91cc9f
--- /dev/null
+++ b/UefiPayloadPkg/Library/PciSegmentInfoLibAcpiBoardInfo/PciSegmentInfoLibAcpiBoardInfo.c
@@ -0,0 +1,59 @@
+/** @file
+  PCI Segment Information Library that returns one segment whose
+  segment base address is retrieved from AcpiBoardInfo HOB.
+
+  Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <PiDxe.h>
+#include <Guid/AcpiBoardInfoGuid.h>
+
+#include <Library/HobLib.h>
+#include <Library/PciSegmentInfoLib.h>
+#include <Library/DebugLib.h>
+
+STATIC PCI_SEGMENT_INFO mPciSegment0 = {
+  0,  // Segment number
+  0,  // To be fixed later
+  0,  // Start bus number
+  255 // End bus number
+};
+
+/**
+  Return an array of PCI_SEGMENT_INFO holding the segment information.
+
+  Note: The returned array/buffer is owned by callee.
+
+  @param  Count  Return the count of segments.
+
+  @retval A callee owned array holding the segment information.
+**/
+PCI_SEGMENT_INFO *
+EFIAPI
+GetPciSegmentInfo (
+  UINTN  *Count
+  )
+{
+  EFI_HOB_GUID_TYPE  *GuidHob;
+  ACPI_BOARD_INFO    *AcpiBoardInfo;
+
+  ASSERT (Count != NULL);
+  if (Count == NULL) {
+    return NULL;
+  }
+
+  if (mPciSegment0.BaseAddress == 0) {
+    //
+    // Find the acpi board information guid hob
+    //
+    GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid);
+    ASSERT (GuidHob != NULL);
+
+    AcpiBoardInfo = (ACPI_BOARD_INFO *) GET_GUID_HOB_DATA (GuidHob);
+    mPciSegment0.BaseAddress = AcpiBoardInfo->PcieBaseAddress;
+  }
+  *Count = 1;
+  return &mPciSegment0;
+}
diff --git a/UefiPayloadPkg/Library/PciSegmentInfoLibAcpiBoardInfo/PciSegmentInfoLibAcpiBoardInfo.inf b/UefiPayloadPkg/Library/PciSegmentInfoLibAcpiBoardInfo/PciSegmentInfoLibAcpiBoardInfo.inf
new file mode 100644
index 0000000000..ec4dbaaa55
--- /dev/null
+++ b/UefiPayloadPkg/Library/PciSegmentInfoLibAcpiBoardInfo/PciSegmentInfoLibAcpiBoardInfo.inf
@@ -0,0 +1,36 @@
+## @file
+#   PCI Segment Information Library that returns one segment whose
+#   segment base address is retrieved from AcpiBoardInfo HOB.
+#
+# Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = PciSegmentInfoLibAcpiBoardInfo
+  FILE_GUID                      = 0EA82AA2-6C36-4FD5-BC90-FFA3ECB5E0CE
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = PciSegmentInfoLib | DXE_DRIVER
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 EBC
+#
+
+[Sources]
+  PciSegmentInfoLibAcpiBoardInfo.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  UefiPayloadPkg/UefiPayloadPkg.dec
+
+[LibraryClasses]
+  PcdLib
+  HobLib
+  DebugLib