--- /dev/null
+#------------------------------------------------------------------------------\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
+# Abstract:\r
+#\r
+# Switch the stack from temporary memory to permenent memory.\r
+#\r
+#------------------------------------------------------------------------------\r
+\r
+ASM_GLOBAL ASM_PFX(Pei2LoaderSwitchStack)\r
+ASM_GLOBAL ASM_PFX(Loader2PeiSwitchStack)\r
+\r
+#------------------------------------------------------------------------------\r
+# UINT32\r
+# EFIAPI\r
+# Pei2LoaderSwitchStack (\r
+# VOID\r
+# )\r
+#------------------------------------------------------------------------------\r
+ASM_GLOBAL ASM_PFX(Pei2LoaderSwitchStack)\r
+ASM_PFX(Pei2LoaderSwitchStack):\r
+ jmp ASM_PFX(Loader2PeiSwitchStack)\r
+\r
+#------------------------------------------------------------------------------\r
+# UINT32\r
+# EFIAPI\r
+# Loader2PeiSwitchStack (\r
+# )\r
+#------------------------------------------------------------------------------\r
+ASM_GLOBAL ASM_PFX(Loader2PeiSwitchStack)\r
+ASM_PFX(Loader2PeiSwitchStack):\r
+#Save current contexts\r
+ push $exit\r
+ pushf\r
+ pushf\r
+ cli\r
+ pusha\r
+ push $0x0\r
+ push $0x0\r
+ sidt (%esp)\r
+\r
+ # Load new stack\r
+ push %esp\r
+ call ASM_PFX(SwapStack)\r
+ mov %eax,%esp\r
+\r
+ # Restore previous contexts\r
+ lidt (%esp)\r
+ add $8,%esp\r
+ popa\r
+ popf\r
+ popf\r
+exit:\r
+ ret\r
+\r
+\r