mirror of https://github.com/acidanthera/audk.git
49 lines
1.6 KiB
NASM
49 lines
1.6 KiB
NASM
//
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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 <Chipset/ArmV7.h>
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#include <AutoGen.h>
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INCLUDE AsmMacroIoLib.inc
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EXPORT ArmIsScuEnable
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EXPORT ArmGetScuBaseAddress
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AREA ArmV7MPCore, CODE, READONLY
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// IN None
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// OUT r0 = SCU Base Address
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ArmGetScuBaseAddress
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// Read Configuration Base Address Register. ArmCBar cannot be called to get
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// the Configuration BAR as a stack is not necessary setup. The SCU is at the
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// offset 0x0000 from the Private Memory Region.
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mrc p15, 4, r0, c15, c0, 0
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bx lr
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// IN None
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// OUT r1 = SCU enabled (boolean)
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ArmIsScuEnable
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// Read Configuration Base Address Register. ArmCBar cannot be called to get
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// the Configuration BAR as a stack is not necessary setup. The SCU is at the
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// offset 0x0000 from the Private Memory Region.
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mrc p15, 4, r0, c15, c0, 0
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add r1, r0, #SCU_CONTROL_OFFSET
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ldr r1, [r1]
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and r1, r1, #1
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bx lr
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END
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