// 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");

 	}