// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// This component and the accompanying materials are made available
// under the terms of the License "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:
//

#include <arm_mem.h>
#include "execs.h"


__NAKED__ TUint32 TTCR()
	{
	asm("mrc p15, 0, r0, c2, c0, 2 ");
	asm("and r0, r0, #7 ");	// only bottom 3 bits are defined
	__JUMP(,lr);
	}


__NAKED__ TUint32 CPUID(TInt /*aRegNum*/)
	{
	asm("movs r1, r0");
	asm("mrcmi p15, 0, r0, c0, c0, 0 "); // for -ve reg, return old CPUID register
	asm("mrceq p15, 0, r0, c0, c1, 0 ");
	asm("subs r1, r1, #1");
	asm("mrceq p15, 0, r0, c0, c1, 1 ");
	asm("subs r1, r1, #1");
	asm("mrceq p15, 0, r0, c0, c1, 2 ");
	asm("subs r1, r1, #1");
	asm("mrceq p15, 0, r0, c0, c1, 3 ");
	asm("subs r1, r1, #1");
	asm("mrceq p15, 0, r0, c0, c1, 4 ");
	asm("subs r1, r1, #1");
	asm("mrceq p15, 0, r0, c0, c1, 5 ");
	asm("subs r1, r1, #1");
	asm("mrceq p15, 0, r0, c0, c1, 6 ");
	asm("subs r1, r1, #1");
	asm("mrceq p15, 0, r0, c0, c1, 7 ");
	asm("subs r1, r1, #1");
	asm("mrceq p15, 0, r0, c0, c2, 0 ");
	asm("subs r1, r1, #1");
	asm("mrceq p15, 0, r0, c0, c2, 1 ");
	asm("subs r1, r1, #1");
	asm("mrceq p15, 0, r0, c0, c2, 2 ");
	asm("subs r1, r1, #1");
	asm("mrceq p15, 0, r0, c0, c2, 3 ");
	asm("subs r1, r1, #1");
	asm("mrceq p15, 0, r0, c0, c2, 4 ");
	asm("subs r1, r1, #1");
	asm("mrceq p15, 0, r0, c0, c2, 5 ");
	asm("subs r1, r1, #1");
	asm("mrceq p15, 0, r0, c0, c2, 6 ");
	asm("subs r1, r1, #1");
	asm("mrceq p15, 0, r0, c0, c2, 7 ");
	__JUMP(,lr);
	}


__NAKED__ void UnlockIPCAlias()
	{
	asm("mrc p15, 0, r0, c3, c0, 0 ");
	asm("orr r0, r0, #%a0 " : : "i" (1 << (2*KIPCAliasDomain)));	// Allow client access to Alias mappings
	asm("mcr p15, 0, r0, c3, c0, 0 ");
	__INST_SYNC_BARRIER_Z__(r0);
	__JUMP(,lr);
	}

__NAKED__ void LockIPCAlias()
	{
	asm("mrc p15, 0, r0, c3, c0, 0 ");
	asm("bic r0, r0, #%a0 " : : "i" (3 << (2*KIPCAliasDomain)));	// Prevent access to Alias mappings
	asm("mcr p15, 0, r0, c3, c0, 0 ");
	__INST_SYNC_BARRIER_Z__(r0);
	__JUMP(,lr);
	}


__NAKED__ void M::LockUserMemory()
	{
	USER_MEMORY_GUARD_ON(,r0,r0);		// Prevent access to User mappings in domain 15
	__JUMP(,lr);
	}


__NAKED__ void M::UnlockUserMemory()
	{
	USER_MEMORY_GUARD_OFF(,r0,r0);		// Allow access to User mappings in domain 15
	__JUMP(,lr);
	}


__NAKED__ void UserWriteFault(TLinAddr /*aAddr*/)
	{
	asm("strbt r1,[r0]");
	__JUMP(,lr);
	}

__NAKED__ void UserReadFault(TLinAddr  /*aAddr*/)
	{	
	asm("ldrbt r1,[r0]");
	__JUMP(,lr);
	}


extern "C" __NAKED__ void __e32_instruction_barrier()
	{
	__INST_SYNC_BARRIER_Z__(r0);
	__JUMP(,lr);
	}