Add IntelFsp2Pkg and IntelFsp2WrapperPkg.

[mirror_edk2.git] / IntelFsp2Pkg / Include / Library / FspSwitchStackLib.h

diff --git a/IntelFsp2Pkg/Include/Library/FspSwitchStackLib.h b/IntelFsp2Pkg/Include/Library/FspSwitchStackLib.h
new file mode 100644 (file)
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--- /dev/null
+++ b/IntelFsp2Pkg/Include/Library/FspSwitchStackLib.h
@@ -0,0 +1,45 @@
+/** @file\r
+\r
+  Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>\r
+  This program and the accompanying materials\r
+  are licensed and made available under the terms and conditions of the BSD License\r
+  which accompanies this distribution.  The full text of the license may be found at\r
+  http://opensource.org/licenses/bsd-license.php.\r
+\r
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+\r
+#ifndef _FSP_SWITCH_STACK_LIB_H_\r
+#define _FSP_SWITCH_STACK_LIB_H_\r
+\r
+/**\r
+\r
+  This funciton will switch the current stack to the previous saved stack.\r
+  Before calling the previous stack has to be set in  FSP_GLOBAL_DATA.CoreStack.\r
+                    EIP\r
+                    FLAGS  16 bit  FLAGS  16 bit\r
+                    EDI\r
+                    ESI\r
+                    EBP\r
+                    ESP\r
+                    EBX\r
+                    EDX\r
+                    ECX\r
+                    EAX\r
+                    DWORD     IDT base1\r
+  StackPointer:     DWORD     IDT base2\r
+\r
+  @return ReturnKey          After switching to the saved stack,\r
+                             this value will be saved in eax before returning.\r
+\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+Pei2LoaderSwitchStack (\r
+  VOID\r
+  );\r
+\r
+#endif\r