// Copyright (c) 2007-2009 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:

// e32\nkern\x86\ncthrd.cia

// 

//

#include <x86.h>

const TLinAddr NKern_Exit = (TLinAddr)NKern::Exit;

const TLinAddr NKern_Lock = (TLinAddr)NKern::Lock;

// Called by a thread when it first runs

__NAKED__ void __StartThread()

	{

	// On entry edi=entry point, esi=parameter block

	asm("sti");

	asm("mov ax, ss");

	asm("mov ds, ax");

	asm("mov es, ax");

	asm("push esi");

	asm("call edi");

	asm("add esp, 4");

	asm("call %a0" : : "i"(NKern_Exit));

	}

// Called by a thread which has been forced to exit

// Interrupts off here, kernel unlocked

__NAKED__ void __DoForcedExit()

	{

	asm("sti");

	asm("call %a0" : : "i"(NKern_Lock));

	asm("mov ecx, [%a0]" : : "i"(&TheScheduler.iCurrentThread));

	asm("mov dword ptr [ecx+%0], 0" : : "i"_FOFF(NThreadBase,iCsCount));

#ifdef __GCC32__

	asm("push ecx");

	asm("call __ZN11NThreadBase4ExitEv"); 

	asm("pop ecx");

#else

	TheScheduler.iCurrentThread->Exit();

#endif

	}

__NAKED__ TUint32 X86::GetCR0()

	{

	asm("mov eax, cr0");

	asm("ret");

	}

__NAKED__ void X86::SetCR0(TUint32)

	{

	asm("mov eax, [esp+4]");

	asm("mov cr0, eax");

	asm("ret");

	}

__NAKED__ TUint32 X86::ModifyCR0(TUint32 /*clear*/, TUint32 /*set*/)

	{

	asm("mov ecx, [esp+4]");

	asm("mov edx, [esp+8]");

	asm("mov eax, cr0");

	asm("not ecx");

	asm("and ecx, eax");

	asm("or ecx, edx");

	asm("mov cr0, ecx");

	asm("ret");

	}