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 | } |