1 files changed, 45 insertions, 0 deletions
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;
+}
+
+