3 files changed, 101 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/BaseS3StallLib/BaseS3StallLib.inf b/roms/edk2/MdePkg/Library/BaseS3StallLib/BaseS3StallLib.inf
new file mode 100644
index 000000000..ae0350921
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/BaseS3StallLib/BaseS3StallLib.inf
@@ -0,0 +1,39 @@
+## @file
+# Instance of S3 Stall Library based on Timer and S3 BootScript Library.
+#
+# Stall Services that do stall and also enable the Stall operatation
+# to be replayed during an S3 resume.
+#
+# Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = BaseS3StallLib
+  MODULE_UNI_FILE                = BaseS3StallLib.uni
+  FILE_GUID                      = 498C6AC3-CC29-4821-BE6F-7C6F4ECF2C14
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = S3StallLib
+
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 EBC
+#
+
+[Sources]
+  S3StallLib.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+
+[LibraryClasses]
+  DebugLib
+  TimerLib
+  S3BootScriptLib
+
diff --git a/roms/edk2/MdePkg/Library/BaseS3StallLib/BaseS3StallLib.uni b/roms/edk2/MdePkg/Library/BaseS3StallLib/BaseS3StallLib.uni
new file mode 100644
index 000000000..40ee09f10
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/BaseS3StallLib/BaseS3StallLib.uni
@@ -0,0 +1,17 @@
+// /** @file
+// Instance of S3 Stall Library based on Timer and S3 BootScript Library.
+//
+// Stall Services that do stall and also enable the Stall operatation
+// to be replayed during an S3 resume.
+//
+// Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+// **/
+
+
+#string STR_MODULE_ABSTRACT             #language en-US "Instance of S3 Stall Library based on Timer and S3 BootScript Library"
+
+#string STR_MODULE_DESCRIPTION          #language en-US "Stall Services that do stall and also enable the Stall operation to be replayed during an S3 resume."
+
diff --git a/roms/edk2/MdePkg/Library/BaseS3StallLib/S3StallLib.c b/roms/edk2/MdePkg/Library/BaseS3StallLib/S3StallLib.c
new file mode 100644
index 000000000..f1f338844
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/BaseS3StallLib/S3StallLib.c
@@ -0,0 +1,45 @@
+/** @file
+  Stall Services that do stall and also enable the Stall operatation
+  to be replayed during an S3 resume. This library class maps directly on top
+  of the Timer class.
+
+  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Base.h>
+
+#include <Library/TimerLib.h>
+#include <Library/DebugLib.h>
+#include <Library/S3BootScriptLib.h>
+#include <Library/S3StallLib.h>
+
+
+/**
+  Stalls the CPU for at least the given number of microseconds and and saves
+  the value in the S3 script to be replayed on S3 resume.
+
+  Stalls the CPU for the number of microseconds specified by MicroSeconds.
+
+  @param  MicroSeconds  The minimum number of microseconds to delay.
+
+  @return MicroSeconds
+
+**/
+UINTN
+EFIAPI
+S3Stall (
+  IN UINTN                     MicroSeconds
+  )
+{
+  RETURN_STATUS    Status;
+
+  Status = S3BootScriptSaveStall (MicroSecondDelay (MicroSeconds));
+  ASSERT (Status == RETURN_SUCCESS);
+
+  return MicroSeconds;
+}
+
+