mirror of https://github.com/acidanthera/audk.git
86 lines
3.0 KiB
C
86 lines
3.0 KiB
C
/** @file
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*
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* Copyright (c) 2011-2012, ARM Limited. All rights reserved.
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*
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* This program and the accompanying materials
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* are licensed and made available under the terms and conditions of the BSD License
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* which accompanies this distribution. The full text of the license may be found at
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* http://opensource.org/licenses/bsd-license.php
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*
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* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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*
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**/
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#include <Uefi.h>
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#include <Library/ArmPlatformGlobalVariableLib.h>
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/PcdLib.h>
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#include <Library/DebugLib.h>
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#define IS_XIP() (((UINT32)PcdGet32 (PcdFdBaseAddress) > (UINT32)(PcdGet32 (PcdSystemMemoryBase) + PcdGet32 (PcdSystemMemorySize))) || \
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((PcdGet32 (PcdFdBaseAddress) + PcdGet32 (PcdFdSize)) < PcdGet32 (PcdSystemMemoryBase)))
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// Declared by ArmPlatformPkg/PrePi Module
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extern UINTN mGlobalVariableBase;
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VOID
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ArmPlatformGetGlobalVariable (
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IN UINTN VariableOffset,
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IN UINTN VariableSize,
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OUT VOID* Variable
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)
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{
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UINTN GlobalVariableBase;
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// Ensure the Global Variable Size have been initialized
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ASSERT (VariableOffset < PcdGet32 (PcdPeiGlobalVariableSize));
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if (IS_XIP()) {
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// In Case of XIP, we expect the Primary Stack at the top of the System Memory
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// The size must be 64bit aligned to allow 64bit variable to be aligned
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GlobalVariableBase = PcdGet32 (PcdSystemMemoryBase) + PcdGet32 (PcdSystemMemorySize) - ALIGN_VALUE(PcdGet32 (PcdPeiGlobalVariableSize),0x8);
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} else {
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GlobalVariableBase = mGlobalVariableBase;
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}
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if (VariableSize == 4) {
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*(UINT32*)Variable = ReadUnaligned32 ((CONST UINT32*)(GlobalVariableBase + VariableOffset));
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} else if (VariableSize == 8) {
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*(UINT32*)Variable = ReadUnaligned64 ((CONST UINT64*)(GlobalVariableBase + VariableOffset));
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} else {
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CopyMem (Variable, (VOID*)(GlobalVariableBase + VariableOffset), VariableSize);
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}
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}
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VOID
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ArmPlatformSetGlobalVariable (
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IN UINTN VariableOffset,
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IN UINTN VariableSize,
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OUT VOID* Variable
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)
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{
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UINTN GlobalVariableBase;
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// Ensure the Global Variable Size have been initialized
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ASSERT (VariableOffset < PcdGet32 (PcdPeiGlobalVariableSize));
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if (IS_XIP()) {
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// In Case of XIP, we expect the Primary Stack at the top of the System Memory
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// The size must be 64bit aligned to allow 64bit variable to be aligned
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GlobalVariableBase = PcdGet32 (PcdSystemMemoryBase) + PcdGet32 (PcdSystemMemorySize) - ALIGN_VALUE(PcdGet32 (PcdPeiGlobalVariableSize),0x8);
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} else {
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GlobalVariableBase = mGlobalVariableBase;
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}
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if (VariableSize == 4) {
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WriteUnaligned32 ((UINT32*)(GlobalVariableBase + VariableOffset), *(UINT32*)Variable);
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} else if (VariableSize == 8) {
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WriteUnaligned64 ((UINT64*)(GlobalVariableBase + VariableOffset), *(UINT64*)Variable);
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} else {
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CopyMem ((VOID*)(GlobalVariableBase + VariableOffset), Variable, VariableSize);
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}
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}
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