411b3ff6dd
REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3832 Add BaseFspSwitchStackLib Support for X64. Cc: Chasel Chiu <chasel.chiu@intel.com> Cc: Nate DeSimone <nathaniel.l.desimone@intel.com> Cc: Star Zeng <star.zeng@intel.com> Cc: Ashraf Ali S <ashraf.ali.s@intel.com> Signed-off-by: Ted Kuo <ted.kuo@intel.com> Reviewed-by: Chasel Chiu <chasel.chiu@intel.com>
36 lines
778 B
C
36 lines
778 B
C
/** @file
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Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Base.h>
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#include <Library/BaseLib.h>
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#include <Library/FspCommonLib.h>
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/**
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Switch the current stack to the previous saved stack.
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@param[in] NewStack The new stack to be switched.
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@return OldStack After switching to the saved stack,
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this value will be saved in eax before returning.
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**/
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UINTN
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SwapStack (
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IN UINTN NewStack
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)
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{
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FSP_GLOBAL_DATA *FspData;
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UINTN OldStack;
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FspData = GetFspGlobalDataPointer ();
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OldStack = FspData->CoreStack;
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FspData->CoreStack = (UINTN) NewStack;
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return OldStack;
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}
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