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cf1d4549 JY |
1 | /** @file\r |
2 | \r | |
630df8c8 | 3 | Copyright (c) 2014 - 2022, 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 | #include <Base.h>\r | |
9 | #include <Library/BaseLib.h>\r | |
10 | #include <Library/FspCommonLib.h>\r | |
11 | \r | |
12 | /**\r | |
13 | \r | |
14 | Switch the current stack to the previous saved stack.\r | |
15 | \r | |
16 | @param[in] NewStack The new stack to be switched.\r | |
17 | \r | |
18 | @return OldStack After switching to the saved stack,\r | |
19 | this value will be saved in eax before returning.\r | |
20 | \r | |
21 | \r | |
22 | **/\r | |
411b3ff6 | 23 | UINTN\r |
630df8c8 | 24 | EFIAPI\r |
cf1d4549 | 25 | SwapStack (\r |
411b3ff6 | 26 | IN UINTN NewStack\r |
cf1d4549 JY |
27 | )\r |
28 | {\r | |
29 | FSP_GLOBAL_DATA *FspData;\r | |
411b3ff6 | 30 | UINTN OldStack;\r |
cf1d4549 | 31 | \r |
111f2228 MK |
32 | FspData = GetFspGlobalDataPointer ();\r |
33 | OldStack = FspData->CoreStack;\r | |
411b3ff6 | 34 | FspData->CoreStack = (UINTN) NewStack;\r |
cf1d4549 JY |
35 | return OldStack;\r |
36 | }\r |