1 files changed, 56 insertions, 0 deletions
diff --git a/src/vendorcode/intel/edk2/edk2-stable202005/MdePkg/Include/Ppi/Stall.h b/src/vendorcode/intel/edk2/edk2-stable202005/MdePkg/Include/Ppi/Stall.h
new file mode 100644
index 0000000000..f0dc62a25d
--- /dev/null
+++ b/src/vendorcode/intel/edk2/edk2-stable202005/MdePkg/Include/Ppi/Stall.h
@@ -0,0 +1,56 @@
+/** @file
+  This file declares Stall PPI.
+
+  This ppi abstracts the blocking stall service to other agents.
+
+  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+  @par Revision Reference:
+  This PPI is introduced in PI Version 1.0.
+
+**/
+
+#ifndef __STALL_PPI_H__
+#define __STALL_PPI_H__
+
+#define EFI_PEI_STALL_PPI_GUID \
+  { 0x1f4c6f90, 0xb06b, 0x48d8, {0xa2, 0x01, 0xba, 0xe5, 0xf1, 0xcd, 0x7d, 0x56 } }
+
+typedef struct _EFI_PEI_STALL_PPI EFI_PEI_STALL_PPI;
+
+/**
+  The Stall() function provides a blocking stall for at least the number
+  of microseconds stipulated in the final argument of the API.
+
+  @param  PeiServices    An indirect pointer to the PEI Services Table
+                         published by the PEI Foundation.
+  @param  This           Pointer to the local data for the interface.
+  @param  Microseconds   Number of microseconds for which to stall.
+
+  @retval EFI_SUCCESS    The service provided at least the required delay.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PEI_STALL)(
+  IN CONST EFI_PEI_SERVICES     **PeiServices,
+  IN CONST EFI_PEI_STALL_PPI    *This,
+  IN UINTN                      Microseconds
+  );
+
+///
+/// This service provides a simple, blocking stall with platform-specific resolution.
+///
+struct _EFI_PEI_STALL_PPI {
+  ///
+  /// The resolution in microseconds of the stall services.
+  ///
+  UINTN          Resolution;
+
+  EFI_PEI_STALL  Stall;
+};
+
+extern EFI_GUID gEfiPeiStallPpiGuid;
+
+#endif