diff options
Diffstat (limited to 'ArmPlatformPkg/Library/ArmPlatformGlobalVariableLib/PrePi')
2 files changed, 122 insertions, 0 deletions
diff --git a/ArmPlatformPkg/Library/ArmPlatformGlobalVariableLib/PrePi/PrePiArmPlatformGlobalVariableLib.c b/ArmPlatformPkg/Library/ArmPlatformGlobalVariableLib/PrePi/PrePiArmPlatformGlobalVariableLib.c new file mode 100644 index 0000000000..3d050bd150 --- /dev/null +++ b/ArmPlatformPkg/Library/ArmPlatformGlobalVariableLib/PrePi/PrePiArmPlatformGlobalVariableLib.c @@ -0,0 +1,76 @@ +/** @file +* +* Copyright (c) 2011, ARM Limited. All rights reserved. +* +* This program and the accompanying materials +* are licensed and made available under the terms and conditions of the BSD License +* which accompanies this distribution. The full text of the license may be found at +* http://opensource.org/licenses/bsd-license.php +* +* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +* +**/ + +#include <Uefi.h> +#include <Library/ArmPlatformGlobalVariableLib.h> +#include <Library/BaseLib.h> +#include <Library/BaseMemoryLib.h> +#include <Library/PcdLib.h> + +#define IS_XIP() ((PcdGet32 (PcdFdBaseAddress) > (PcdGet32 (PcdSystemMemoryBase) + PcdGet32 (PcdSystemMemorySize))) || \ + ((PcdGet32 (PcdFdBaseAddress) + PcdGet32 (PcdFdSize)) < PcdGet32 (PcdSystemMemoryBase))) + +// Declared by ArmPlatformPkg/PrePi Module +extern UINTN mGlobalVariableBase; + +VOID +ArmPlatformGetGlobalVariable ( + IN UINTN VariableOffset, + IN UINTN VariableSize, + OUT VOID* Variable + ) +{ + UINTN GlobalVariableBase; + + if (IS_XIP()) { + // In Case of XIP, we expect the Primary Stack at the top of the System Memory + GlobalVariableBase = PcdGet32 (PcdSystemMemoryBase) + PcdGet32 (PcdSystemMemorySize) - PcdGet32 (PcdPeiGlobalVariableSize); + } else { + GlobalVariableBase = mGlobalVariableBase; + } + + if (VariableSize == 4) { + *(UINT32*)Variable = ReadUnaligned32 ((CONST UINT32*)(GlobalVariableBase + VariableOffset)); + } else if (VariableSize == 8) { + *(UINT32*)Variable = ReadUnaligned64 ((CONST UINT64*)(GlobalVariableBase + VariableOffset)); + } else { + CopyMem (Variable, (VOID*)(GlobalVariableBase + VariableOffset), VariableSize); + } +} + +VOID +ArmPlatformSetGlobalVariable ( + IN UINTN VariableOffset, + IN UINTN VariableSize, + OUT VOID* Variable + ) +{ + UINTN GlobalVariableBase; + + if (IS_XIP()) { + // In Case of XIP, we expect the Primary Stack at the top of the System Memory + GlobalVariableBase = PcdGet32 (PcdSystemMemoryBase) + PcdGet32 (PcdSystemMemorySize) - PcdGet32 (PcdPeiGlobalVariableSize); + } else { + GlobalVariableBase = mGlobalVariableBase; + } + + if (VariableSize == 4) { + WriteUnaligned32 ((UINT32*)(GlobalVariableBase + VariableOffset), *(UINT32*)Variable); + } else if (VariableSize == 8) { + WriteUnaligned64 ((UINT64*)(GlobalVariableBase + VariableOffset), *(UINT64*)Variable); + } else { + CopyMem ((VOID*)(GlobalVariableBase + VariableOffset), Variable, VariableSize); + } +} + diff --git a/ArmPlatformPkg/Library/ArmPlatformGlobalVariableLib/PrePi/PrePiArmPlatformGlobalVariableLib.inf b/ArmPlatformPkg/Library/ArmPlatformGlobalVariableLib/PrePi/PrePiArmPlatformGlobalVariableLib.inf new file mode 100644 index 0000000000..dfe8f2e4b9 --- /dev/null +++ b/ArmPlatformPkg/Library/ArmPlatformGlobalVariableLib/PrePi/PrePiArmPlatformGlobalVariableLib.inf @@ -0,0 +1,46 @@ +#/** @file +# Timer library implementation +# +# +# Copyright (c) 2011, ARM Ltd. All rights reserved.<BR> +# This program and the accompanying materials +# are licensed and made available under the terms and conditions of the BSD License +# which accompanies this distribution. The full text of the license may be found at +# http://opensource.org/licenses/bsd-license.php +# +# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +# +#**/ + +[Defines] + INF_VERSION = 0x00010005 + BASE_NAME = PrePiArmPlatformGlobalVariableLib + FILE_GUID = 44d59470-e5e6-4811-af00-33bb573a804b + MODULE_TYPE = BASE + VERSION_STRING = 1.0 + LIBRARY_CLASS = ArmPlatformGlobalVariableLib + +[Sources.common] + PrePiArmPlatformGlobalVariableLib.c + +[Packages] + MdePkg/MdePkg.dec + ArmPlatformPkg/ArmPlatformPkg.dec + ArmPkg/ArmPkg.dec + +[LibraryClasses] + BaseLib + PcdLib + +[FixedPcd] + gArmTokenSpaceGuid.PcdFdBaseAddress + gArmTokenSpaceGuid.PcdFdSize + + gArmTokenSpaceGuid.PcdSystemMemoryBase + gArmTokenSpaceGuid.PcdSystemMemorySize + + gArmPlatformTokenSpaceGuid.PcdCPUCoresStackBase + gArmPlatformTokenSpaceGuid.PcdCPUCorePrimaryStackSize + gArmPlatformTokenSpaceGuid.PcdPeiGlobalVariableSize + |