+/** @file\r
+ SwitchStack() function for IPF.\r
+\r
+ Copyright (c) 2007, Intel Corporation<BR>\r
+ All rights reserved. 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
+ Module Name: InternalSwitchStack.c\r
+\r
+**/\r
+\r
+#include <BaseLibInternals.h>\r
+\r
+/**
+ Transfers control to a function starting with a new stack.
+
+ Transfers control to the function specified by EntryPoint using the
+ new stack specified by NewStack and passing in the parameters specified
+ by Context1 and Context2. Context1 and Context2 are optional and may
+ be NULL. The function EntryPoint must never return.
+ Marker will be ignored on IA-32, x64, and EBC.
+ IPF CPUs expect one additional parameter of type VOID * that specifies
+ the new backing store pointer.\r
+
+ If EntryPoint is NULL, then ASSERT().\r
+ If NewStack is NULL, then ASSERT().\r
+
+ @param EntryPoint A pointer to function to call with the new stack.
+ @param Context1 A pointer to the context to pass into the EntryPoint
+ function.
+ @param Context2 A pointer to the context to pass into the EntryPoint
+ function.
+ @param NewStack A pointer to the new stack to use for the EntryPoint
+ function.\r
+ @param Marker VA_LIST marker for the variable argument list.
+
+**/\r
+VOID
+EFIAPI
+InternalSwitchStack (
+ IN SWITCH_STACK_ENTRY_POINT EntryPoint,
+ IN VOID *Context1, OPTIONAL
+ IN VOID *Context2, OPTIONAL
+ IN VOID *NewStack,
+ IN VA_LIST Marker
+ )\r
+\r
+{\r
+ VOID *NewBsp;\r
+\r
+ //\r
+ // Get new backing store pointer from variable list\r
+ //\r
+ NewBsp = VA_ARG (Marker, VOID *);\r
+\r
+ //\r
+ // Stack should be aligned with CPU_STACK_ALIGNMENT\r
+ //\r
+ ASSERT (((UINTN)NewStack & (CPU_STACK_ALIGNMENT - 1)) == 0);\r
+ ASSERT (((UINTN)NewBsp & (CPU_STACK_ALIGNMENT - 1)) == 0);\r
+\r
+ AsmSwitchStackAndBackingStore (EntryPoint, Context1, Context2, NewStack, NewBsp);\r
+}\r