1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/kernelhwsrv/kernel/eka/memmodel/epoc/direct/arm/xkernel.cpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,88 @@
     1.4 +// Copyright (c) 1994-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of the License "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +// e32\memmodel\epoc\direct\arm\xkernel.cpp
    1.18 +// 
    1.19 +//
    1.20 +
    1.21 +#include "arm_mem.h"
    1.22 +
    1.23 +/********************************************
    1.24 + * Thread
    1.25 + ********************************************/
    1.26 +
    1.27 +TInt DArmPlatThread::SetupContext(SThreadCreateInfo& anInfo)
    1.28 +	{
    1.29 +#ifndef __SMP__
    1.30 +	if(iThreadType==EThreadUser)
    1.31 +		iNThread.iSpare3 /*iUserContextType*/ = NThread::EContextUndefined;
    1.32 +#endif
    1.33 +	return KErrNone;
    1.34 +	}
    1.35 +
    1.36 +DArmPlatProcess::DArmPlatProcess()
    1.37 +	{}
    1.38 +
    1.39 +DArmPlatProcess::~DArmPlatProcess()
    1.40 +	{
    1.41 +	__KTRACE_OPT(KMMU,Kern::Printf("DArmPlatProcess destruct"));
    1.42 +	DMemModelProcess::Destruct();
    1.43 +	}
    1.44 +
    1.45 +TBool Exc::IsMagic(TLinAddr /*anAddress*/)
    1.46 +//
    1.47 +// Return TRUE if anAddress is a 'magic' exception handling instruction
    1.48 +//
    1.49 +	{
    1.50 +	return EFalse;
    1.51 +	}
    1.52 +
    1.53 +void DThread::IpcExcHandler(TExcTrap* aTrap, DThread* aThread, TAny* aContext)
    1.54 +	{
    1.55 +	aThread->iIpcClient = 0;
    1.56 +	TIpcExcTrap& xt=*(TIpcExcTrap*)aTrap;
    1.57 +	TArmExcInfo& info=*(TArmExcInfo*)aContext;
    1.58 +	if (info.iExcCode==EArmExceptionDataAbort)
    1.59 +		{
    1.60 +		TUint32 opcode = *(TUint32*)info.iR15;		// faulting instruction
    1.61 +		if (opcode>=0xf0000000)
    1.62 +			return;									// not a load/store so fault the kernel
    1.63 +		TUint32 opc1 = (opcode>>25)&7;
    1.64 +		TBool load;
    1.65 +		if ( (opc1==2) || (opc1==4) || (opc1==3 && !(opcode&0x10)) )
    1.66 +			load=opcode & 0x00100000;				// bit 20=1 for load, 0 for store
    1.67 +		else if (opc1==0)
    1.68 +			{
    1.69 +			TUint32 opc2 = (opcode>>4)&0xf;
    1.70 +			if (opc2==0x0b)
    1.71 +				load=opcode & 0x00100000;			// bit 20=1 for load, 0 for store
    1.72 +			else if ((opc2&0x0d)==0x0d)
    1.73 +				{
    1.74 +				if (opcode&0x00100000)
    1.75 +					load=ETrue;						// LDRSB/LDRSH
    1.76 +				else
    1.77 +					load=(opcode&0x20)^0x20;		// LDRD/STRD, bit5=1 for STRD, 0 for LDRD
    1.78 +				}
    1.79 +			else
    1.80 +				return;								// not a load/store so fault the kernel
    1.81 +			}
    1.82 +		else
    1.83 +			return;									// not a load/store so fault the kernel
    1.84 +
    1.85 +		if ((load && !xt.iDir) || (!load && xt.iDir))
    1.86 +			xt.Exception(KErrBadDescriptor);	// problem accessing remote address - 'leave' so an error code will be returned
    1.87 +		NKern::UnlockSystem();			// else assume problem accessing local address - return and panic current thread as usual
    1.88 +		}
    1.89 +	// otherwise return and fault kernel
    1.90 +	}
    1.91 +