kernel/eka/nkernsmp/x86/ncutilf.cpp
author Pat Downey <patd@symbian.org>
Wed, 01 Sep 2010 12:34:56 +0100
branchRCL_3
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parent 256 c1f20ce4abcf
permissions -rw-r--r--
Revert incorrect RCL_3 drop: Revision: 201035 Kit: 201035
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// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of the License "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// e32\nkernsmp\x86\ncutilf.cpp
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// 
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//
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#include <nkern.h>
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extern "C" {
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extern SVariantInterfaceBlock* VIB;
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}
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/******************************************************************************
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 * Spin lock
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 ******************************************************************************/
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/** Create a spin lock
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	@publishedPartner
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	@released
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*/
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EXPORT_C TSpinLock::TSpinLock(TUint aOrder)
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	{
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	(void)aOrder;
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	__NK_ASSERT_DEBUG( (aOrder==EOrderNone) || ((aOrder&0x7f)<0x20) );
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	if (aOrder>=0x80 && aOrder!=EOrderNone)
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		aOrder -= 0x60;
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	aOrder |= 0xFF00u;
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	iLock = TUint64(aOrder)<<48;	// byte 6 = 00-1F for interrupt, 20-3F for preemption
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									// byte 7 = FF if not held
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	}
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/******************************************************************************
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 * Read/Write Spin lock
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 ******************************************************************************/
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/** Create a spin lock
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	@publishedPartner
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	@released
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*/
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EXPORT_C TRWSpinLock::TRWSpinLock(TUint aOrder)
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	{
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	(void)aOrder;
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	__NK_ASSERT_DEBUG( (aOrder==TSpinLock::EOrderNone) || ((aOrder&0x7f)<0x20) );
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	if (aOrder>=0x80 && aOrder!=TSpinLock::EOrderNone)
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		aOrder -= 0x60;
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	aOrder |= 0xFF00u;
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	iLock = TUint64(aOrder)<<48;	// byte 6 = 00-1F for interrupt, 20-3F for preemption
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									// byte 7 = FF if not held
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	}
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/** Get the frequency of counter queried by NKern::Timestamp().
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*/
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EXPORT_C TUint32 NKern::TimestampFrequency()
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	{
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	return VIB->iTimestampFreq;
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	}
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