1 files changed, 44 insertions, 3 deletions
diff --git a/IntelFsp2WrapperPkg/Library/BaseFspWrapperApiLib/X64/DispatchExecute.c b/IntelFsp2WrapperPkg/Library/BaseFspWrapperApiLib/X64/DispatchExecute.c
index 2ee5bc3dd4..591a5c7a55 100644
--- a/IntelFsp2WrapperPkg/Library/BaseFspWrapperApiLib/X64/DispatchExecute.c
+++ b/IntelFsp2WrapperPkg/Library/BaseFspWrapperApiLib/X64/DispatchExecute.c
@@ -1,9 +1,9 @@
 /** @file
-  Execute 32-bit code in Long Mode.
+  Execute 64-bit code in Long Mode.
   Provide a thunk function to transition from long mode to compatibility mode to execute 32-bit code and then transit
   back to long mode.
 
-  Copyright (c) 2014 - 2018, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2014 - 2022, Intel Corporation. All rights reserved.<BR>
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
@@ -12,6 +12,21 @@
 #include <Library/BaseLib.h>
 #include <FspEas.h>
 
+/**
+  FSP API functions.
+
+  @param[in] Param1       The first parameter to pass to 64bit code.
+  @param[in] Param2       The second parameter to pass to 64bit code.
+
+  @return EFI_STATUS.
+**/
+typedef
+EFI_STATUS
+(EFIAPI *FSP_FUNCTION)(
+  IN VOID *Param1,
+  IN VOID *Param2
+  );
+
 #pragma pack(1)
 typedef union {
   struct {
@@ -80,7 +95,7 @@ AsmExecute32BitCode (
   );
 
 /**
-  Wrapper for a thunk  to transition from long mode to compatibility mode to execute 32-bit code and then transit back to
+  Wrapper for a thunk to transition from long mode to compatibility mode to execute 32-bit code and then transit back to
   long mode.
 
   @param[in] Function     The 32bit code entry to be executed.
@@ -110,3 +125,29 @@ Execute32BitCode (
 
   return Status;
 }
+
+/**
+  Wrapper to execute 64-bit code directly from long mode.
+
+  @param[in] Function     The 64bit code entry to be executed.
+  @param[in] Param1       The first parameter to pass to 64bit code.
+  @param[in] Param2       The second parameter to pass to 64bit code.
+
+  @return EFI_STATUS.
+**/
+EFI_STATUS
+Execute64BitCode (
+  IN UINT64  Function,
+  IN UINT64  Param1,
+  IN UINT64  Param2
+  )
+{
+  FSP_FUNCTION  EntryFunc;
+  EFI_STATUS    Status;
+
+  EntryFunc = (FSP_FUNCTION)(UINTN)(Function);
+  Status    = EntryFunc ((VOID *)(UINTN)Param1, (VOID *)(UINTN)Param2);
+
+  return Status;
+}
+