blob: e8b0d53bb1efcd13087114724bc791a6ae6a18c0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/*++ @file
Temp RAM PPI
Copyright (c) 2011, Apple Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiPei.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Ppi/TemporaryRamSupport.h>
VOID
EFIAPI
SecSwitchStack (
UINT32 TemporaryMemoryBase,
UINT32 PermenentMemoryBase
);
EFI_STATUS
EFIAPI
SecTemporaryRamSupport (
IN CONST EFI_PEI_SERVICES **PeiServices,
IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase,
IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase,
IN UINTN CopySize
)
{
//
// Migrate the whole temporary memory to permanent memory.
//
CopyMem (
(VOID*)(UINTN)PermanentMemoryBase,
(VOID*)(UINTN)TemporaryMemoryBase,
CopySize
);
//
// SecSwitchStack function must be invoked after the memory migration
// immediately, also we need fixup the stack change caused by new call into
// permanent memory.
//
SecSwitchStack ((UINT32) TemporaryMemoryBase, (UINT32) PermanentMemoryBase);
//
// We need *not* fix the return address because currently,
// The PeiCore is executed in flash.
//
//
// Simulate to invalid temporary memory, terminate temporary memory
//
//ZeroMem ((VOID*)(UINTN)TemporaryMemoryBase, CopySize);
return EFI_SUCCESS;
}
|
