--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/navienginebsp/naviengine_assp/register.cpp	Tue Sep 28 18:00:05 2010 +0100
@@ -0,0 +1,110 @@
+/*
+* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  
+* naviengine_assp\assp.cpp
+*
+*/
+
+
+
+#include <naviengine_priv.h>
+
+#ifdef __SMP__
+TSpinLock AsspLock(TSpinLock::EOrderGenericIrqLow1);
+#endif
+
+//
+//
+// MHA - Modular Hardware Adaption
+//
+// Register Access
+//
+//
+
+
+//
+// We need spin locks around read, modify, write operations because another CPU
+// may access the same memory in between operations and potentially cause
+// memory corruption.
+//
+EXPORT_C void AsspRegister::Modify8(TLinAddr aAddr, TUint8 aClearMask, TUint8 aSetMask)
+	{
+	TUint irq = __SPIN_LOCK_IRQSAVE(AsspLock);
+	TUint8  value = *(volatile TUint8  *)aAddr;
+	value &= ~aClearMask;
+	value |= aSetMask;
+	*(volatile TUint8  *)aAddr = value;
+	__SPIN_UNLOCK_IRQRESTORE(AsspLock,irq);
+	}
+
+EXPORT_C void AsspRegister::Modify16(TLinAddr aAddr, TUint16 aClearMask, TUint16 aSetMask)
+	{
+	TUint irq = __SPIN_LOCK_IRQSAVE(AsspLock);
+	TUint16 value = *(volatile TUint16 *)aAddr;
+	value &= ~aClearMask;
+	value |= aSetMask;
+	*(volatile TUint16 *)aAddr = value;
+	__SPIN_UNLOCK_IRQRESTORE(AsspLock,irq);
+	}
+
+EXPORT_C void AsspRegister::Modify32(TLinAddr aAddr, TUint32 aClearMask, TUint32 aSetMask)
+	{
+	TUint irq = __SPIN_LOCK_IRQSAVE(AsspLock);
+	TUint32 value = *(volatile TUint32 *)aAddr;
+	value &= ~aClearMask;
+	value |= aSetMask;
+	*(volatile TUint32 *)aAddr = value;
+	__SPIN_UNLOCK_IRQRESTORE(AsspLock,irq);
+	}
+
+//
+// 64 bit operations may be more complex than 8/16/32 bit operations, depending
+// upon hardware support for 64 bit accesses.
+//
+// For example, one platform required an assembly language function to prevent
+// the compliler optimising the accesses into 2 x 32 bit accesses and causing a
+// bus error.
+//
+// Spinlocks are required for non-atomic operations and are therefore
+// recommended for 64 bit accesses on current platforms.
+//
+extern TUint64 DoRead64(TLinAddr aAddr);
+
+EXPORT_C TUint64 AsspRegister::Read64(TLinAddr aAddr)
+	{
+	TUint irq = __SPIN_LOCK_IRQSAVE(AsspLock);
+	TUint64 value = DoRead64(aAddr);
+	__SPIN_UNLOCK_IRQRESTORE(AsspLock,irq);
+	return value;
+	}
+
+extern void DoWrite64(TLinAddr aAddr, TUint64 aValue);
+
+EXPORT_C void AsspRegister::Write64(TLinAddr aAddr, TUint64 aValue)
+	{
+	TUint irq = __SPIN_LOCK_IRQSAVE(AsspLock);
+	DoWrite64(aAddr, aValue);
+	__SPIN_UNLOCK_IRQRESTORE(AsspLock,irq);
+	}
+
+EXPORT_C void AsspRegister::Modify64(TLinAddr aAddr, TUint64 aClearMask, TUint64 aSetMask)
+	{
+	TUint irq = __SPIN_LOCK_IRQSAVE(AsspLock);
+	TUint64 value = DoRead64(aAddr);
+	value &= ~aClearMask;
+	value |= aSetMask;
+	DoWrite64(aAddr, value);
+	__SPIN_UNLOCK_IRQRESTORE(AsspLock,irq);
+	}
+