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

/** @file\r
\r
  Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#ifndef _FSP_SWITCH_STACK_LIB_H_\r
#define _FSP_SWITCH_STACK_LIB_H_\r
\r
/**\r
\r
  This function 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
Commit	Line	Data
cf1d4549 JY	1	/** @file\r
	2	\r
	3	Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>\r
9672cd30	4	SPDX-License-Identifier: BSD-2-Clause-Patent\r
cf1d4549 JY	5	\r
	6	**/\r
	7	\r
	8	#ifndef _FSP_SWITCH_STACK_LIB_H_\r
	9	#define _FSP_SWITCH_STACK_LIB_H_\r
	10	\r
	11	/**\r
	12	\r
058dcbf2	13	This function will switch the current stack to the previous saved stack.\r
cf1d4549 JY	14	Before calling the previous stack has to be set in FSP_GLOBAL_DATA.CoreStack.\r
	15	EIP\r
	16	FLAGS 16 bit FLAGS 16 bit\r
	17	EDI\r
	18	ESI\r
	19	EBP\r
	20	ESP\r
	21	EBX\r
	22	EDX\r
	23	ECX\r
	24	EAX\r
	25	DWORD IDT base1\r
	26	StackPointer: DWORD IDT base2\r
	27	\r
	28	@return ReturnKey After switching to the saved stack,\r
	29	this value will be saved in eax before returning.\r
	30	\r
	31	\r
	32	**/\r
	33	UINT32\r
	34	EFIAPI\r
	35	Pei2LoaderSwitchStack (\r
	36	VOID\r
	37	);\r
	38	\r
	39	#endif\r