| Ronak Kanabar | 1ae366f | 2023-06-07 01:21:56 +0530 | [diff] [blame^] | 1 | /** @file |
| 2 | |
| 3 | Copyright (c) 2014 - 2020, Intel Corporation. All rights reserved.<BR> |
| 4 | SPDX-License-Identifier: BSD-2-Clause-Patent |
| 5 | |
| 6 | **/ |
| 7 | |
| 8 | #ifndef _FSP_SWITCH_STACK_LIB_H_ |
| 9 | #define _FSP_SWITCH_STACK_LIB_H_ |
| 10 | |
| 11 | /** |
| 12 | |
| 13 | This function will switch the current stack to the previous saved stack. |
| 14 | Before calling the previous stack has to be set in FSP_GLOBAL_DATA.CoreStack. |
| 15 | EIP |
| 16 | FLAGS 16 bit FLAGS 16 bit |
| 17 | EDI |
| 18 | ESI |
| 19 | EBP |
| 20 | ESP |
| 21 | EBX |
| 22 | EDX |
| 23 | ECX |
| 24 | EAX |
| 25 | DWORD IDT base1 |
| 26 | StackPointer: DWORD IDT base2 |
| 27 | |
| 28 | @return ReturnKey After switching to the saved stack, |
| 29 | this value will be saved in eax before returning. |
| 30 | |
| 31 | |
| 32 | **/ |
| 33 | EFI_STATUS |
| 34 | EFIAPI |
| 35 | Pei2LoaderSwitchStack ( |
| 36 | VOID |
| 37 | ); |
| 38 | |
| 39 | /** |
| 40 | |
| 41 | This function is equivalent to Pei2LoaderSwitchStack () but just indicates |
| 42 | the stack after switched is FSP stack. |
| 43 | |
| 44 | @return ReturnKey After switching to the saved stack, |
| 45 | this value will be saved in eax before returning. |
| 46 | |
| 47 | |
| 48 | **/ |
| 49 | EFI_STATUS |
| 50 | EFIAPI |
| 51 | Loader2PeiSwitchStack ( |
| 52 | VOID |
| 53 | ); |
| 54 | |
| 55 | #endif |