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Commit | Line | Data |
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aac0fea7 | 1 | /*++ @file |
2 | Temp RAM PPI | |
3 | ||
4 | Copyright (c) 2011, Apple Inc. All rights reserved.<BR> | |
5 | This program and the accompanying materials | |
6 | are licensed and made available under the terms and conditions of the BSD License | |
7 | which accompanies this distribution. The full text of the license may be found at | |
8 | http://opensource.org/licenses/bsd-license.php | |
9 | ||
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
12 | ||
13 | **/ | |
14 | ||
15 | #include <PiPei.h> | |
16 | #include <Library/DebugLib.h> | |
17 | #include <Library/BaseMemoryLib.h> | |
18 | ||
19 | #include <Ppi/TemporaryRamSupport.h> | |
20 | ||
21 | VOID | |
22 | EFIAPI | |
23 | SecSwitchStack ( | |
24 | UINT32 TemporaryMemoryBase, | |
25 | UINT32 PermenentMemoryBase | |
26 | ); | |
27 | ||
28 | ||
29 | EFI_STATUS | |
30 | EFIAPI | |
31 | SecTemporaryRamSupport ( | |
32 | IN CONST EFI_PEI_SERVICES **PeiServices, | |
33 | IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase, | |
34 | IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase, | |
35 | IN UINTN CopySize | |
36 | ) | |
37 | { | |
38 | // | |
39 | // Migrate the whole temporary memory to permenent memory. | |
40 | // | |
41 | CopyMem ( | |
42 | (VOID*)(UINTN)PermanentMemoryBase, | |
43 | (VOID*)(UINTN)TemporaryMemoryBase, | |
44 | CopySize | |
45 | ); | |
46 | ||
47 | // | |
48 | // SecSwitchStack function must be invoked after the memory migration | |
49 | // immediatly, also we need fixup the stack change caused by new call into | |
50 | // permenent memory. | |
51 | // | |
52 | SecSwitchStack ((UINT32) TemporaryMemoryBase, (UINT32) PermanentMemoryBase); | |
53 | ||
54 | // | |
55 | // We need *not* fix the return address because currently, | |
56 | // The PeiCore is excuted in flash. | |
57 | // | |
58 | ||
59 | // | |
60 | // Simulate to invalid temporary memory, terminate temporary memory | |
61 | // | |
62 | //ZeroMem ((VOID*)(UINTN)TemporaryMemoryBase, CopySize); | |
63 | ||
64 | return EFI_SUCCESS; | |
65 | } |