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8fc38a3f | 1 | /** @file |
2 | * | |
3 | * Copyright (c) 2011, ARM Limited. All rights reserved. | |
4 | * | |
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 <Uefi.h> | |
16 | #include <Library/ArmPlatformGlobalVariableLib.h> | |
17 | #include <Library/BaseLib.h> | |
18 | #include <Library/BaseMemoryLib.h> | |
19 | #include <Library/PcdLib.h> | |
20 | ||
21 | #define IS_XIP() ((PcdGet32 (PcdFdBaseAddress) > (PcdGet32 (PcdSystemMemoryBase) + PcdGet32 (PcdSystemMemorySize))) || \ | |
22 | ((PcdGet32 (PcdFdBaseAddress) + PcdGet32 (PcdFdSize)) < PcdGet32 (PcdSystemMemoryBase))) | |
23 | ||
24 | // Declared by ArmPlatformPkg/PrePi Module | |
25 | extern UINTN mGlobalVariableBase; | |
26 | ||
27 | VOID | |
28 | ArmPlatformGetGlobalVariable ( | |
29 | IN UINTN VariableOffset, | |
30 | IN UINTN VariableSize, | |
31 | OUT VOID* Variable | |
32 | ) | |
33 | { | |
34 | UINTN GlobalVariableBase; | |
35 | ||
36 | if (IS_XIP()) { | |
37 | // In Case of XIP, we expect the Primary Stack at the top of the System Memory | |
38 | GlobalVariableBase = PcdGet32 (PcdSystemMemoryBase) + PcdGet32 (PcdSystemMemorySize) - PcdGet32 (PcdPeiGlobalVariableSize); | |
39 | } else { | |
40 | GlobalVariableBase = mGlobalVariableBase; | |
41 | } | |
42 | ||
43 | if (VariableSize == 4) { | |
44 | *(UINT32*)Variable = ReadUnaligned32 ((CONST UINT32*)(GlobalVariableBase + VariableOffset)); | |
45 | } else if (VariableSize == 8) { | |
46 | *(UINT32*)Variable = ReadUnaligned64 ((CONST UINT64*)(GlobalVariableBase + VariableOffset)); | |
47 | } else { | |
48 | CopyMem (Variable, (VOID*)(GlobalVariableBase + VariableOffset), VariableSize); | |
49 | } | |
50 | } | |
51 | ||
52 | VOID | |
53 | ArmPlatformSetGlobalVariable ( | |
54 | IN UINTN VariableOffset, | |
55 | IN UINTN VariableSize, | |
56 | OUT VOID* Variable | |
57 | ) | |
58 | { | |
59 | UINTN GlobalVariableBase; | |
60 | ||
61 | if (IS_XIP()) { | |
62 | // In Case of XIP, we expect the Primary Stack at the top of the System Memory | |
63 | GlobalVariableBase = PcdGet32 (PcdSystemMemoryBase) + PcdGet32 (PcdSystemMemorySize) - PcdGet32 (PcdPeiGlobalVariableSize); | |
64 | } else { | |
65 | GlobalVariableBase = mGlobalVariableBase; | |
66 | } | |
67 | ||
68 | if (VariableSize == 4) { | |
69 | WriteUnaligned32 ((UINT32*)(GlobalVariableBase + VariableOffset), *(UINT32*)Variable); | |
70 | } else if (VariableSize == 8) { | |
71 | WriteUnaligned64 ((UINT64*)(GlobalVariableBase + VariableOffset), *(UINT64*)Variable); | |
72 | } else { | |
73 | CopyMem ((VOID*)(GlobalVariableBase + VariableOffset), Variable, VariableSize); | |
74 | } | |
75 | } | |
76 |