3 * Copyright (c) 2011-2012, ARM Limited. All rights reserved.
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
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.
16 #include <Library/ArmPlatformGlobalVariableLib.h>
17 #include <Library/BaseLib.h>
18 #include <Library/BaseMemoryLib.h>
19 #include <Library/PcdLib.h>
20 #include <Library/DebugLib.h>
22 // Declared by ArmPlatformPkg/PrePi Module
23 extern UINTN mGlobalVariableBase
;
26 ArmPlatformGetGlobalVariable (
27 IN UINTN VariableOffset
,
28 IN UINTN VariableSize
,
32 UINTN GlobalVariableBase
;
34 // Ensure the Global Variable Size have been initialized
35 ASSERT (VariableOffset
< PcdGet32 (PcdPeiGlobalVariableSize
));
37 GlobalVariableBase
= PcdGet32 (PcdCPUCoresStackBase
) + PcdGet32 (PcdCPUCorePrimaryStackSize
) - PcdGet32 (PcdPeiGlobalVariableSize
) + VariableOffset
;
39 if (VariableSize
== 4) {
40 *(UINT32
*)Variable
= ReadUnaligned32 ((CONST UINT32
*)(GlobalVariableBase
+ VariableOffset
));
41 } else if (VariableSize
== 8) {
42 *(UINT64
*)Variable
= ReadUnaligned64 ((CONST UINT64
*)(GlobalVariableBase
+ VariableOffset
));
44 CopyMem (Variable
, (VOID
*)(GlobalVariableBase
+ VariableOffset
), VariableSize
);
49 ArmPlatformSetGlobalVariable (
50 IN UINTN VariableOffset
,
51 IN UINTN VariableSize
,
55 UINTN GlobalVariableBase
;
57 // Ensure the Global Variable Size have been initialized
58 ASSERT (VariableOffset
< PcdGet32 (PcdPeiGlobalVariableSize
));
60 GlobalVariableBase
= PcdGet32 (PcdCPUCoresStackBase
) + PcdGet32 (PcdCPUCorePrimaryStackSize
) - PcdGet32 (PcdPeiGlobalVariableSize
) + VariableOffset
;
62 if (VariableSize
== 4) {
63 WriteUnaligned32 ((UINT32
*)(GlobalVariableBase
+ VariableOffset
), *(UINT32
*)Variable
);
64 } else if (VariableSize
== 8) {
65 WriteUnaligned64 ((UINT64
*)(GlobalVariableBase
+ VariableOffset
), *(UINT64
*)Variable
);
67 CopyMem ((VOID
*)(GlobalVariableBase
+ VariableOffset
), Variable
, VariableSize
);
72 ArmPlatformGetGlobalVariableAddress (
73 IN UINTN VariableOffset
76 UINTN GlobalVariableBase
;
78 // Ensure the Global Variable Size have been initialized
79 ASSERT (VariableOffset
< PcdGet32 (PcdPeiGlobalVariableSize
));
81 GlobalVariableBase
= PcdGet32 (PcdCPUCoresStackBase
) + PcdGet32 (PcdCPUCorePrimaryStackSize
) - PcdGet32 (PcdPeiGlobalVariableSize
);
83 return (VOID
*)(GlobalVariableBase
+ VariableOffset
);