mirror of https://github.com/acidanthera/audk.git
58 lines
2.1 KiB
ArmAsm
Executable File
58 lines
2.1 KiB
ArmAsm
Executable File
//
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// Copyright (c) 2011, 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 <AsmMacroIoLib.h>
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#include <Base.h>
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#include <Library/PcdLib.h>
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#include <BeagleBoard.h>
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#include <AutoGen.h>
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.text
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.align 3
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GCC_ASM_EXPORT(ArmPlatformIsBootMemoryInitialized)
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GCC_ASM_EXPORT(ArmPlatformInitializeBootMemory)
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/**
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Called at the early stage of the Boot phase to know if the memory has already been initialized
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Running the code from the reset vector does not mean we start from cold boot. In some case, we
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can go through this code with the memory already initialized.
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Because this function is called at the early stage, the implementation must not use the stack.
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Its implementation must probably done in assembly to ensure this requirement.
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@return Return a non zero value if initialized
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**/
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ASM_PFX(ArmPlatformIsBootMemoryInitialized):
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// The system memory is initialized by the BeagleBoard firmware
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mov r0, #1
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bx lr
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/**
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Initialize the memory where the initial stacks will reside
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This memory can contain the initial stacks (Secure and Secure Monitor stacks).
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In some platform, this region is already initialized and the implementation of this function can
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do nothing. This memory can also represent the Secure RAM.
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This function is called before the satck has been set up. Its implementation must ensure the stack
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pointer is not used (probably required to use assembly language)
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**/
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ASM_PFX(ArmPlatformInitializeBootMemory):
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// We must need to go into this function
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bx lr
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ASM_FUNCTION_REMOVE_IF_UNREFERENCED
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