// 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\ncutils.cia

// 

//

#include <x86.h>

EXPORT_C __NAKED__ TUint64 X86::Timestamp()

	{

	asm("rdtsc");

	asm("ret");

	}

extern "C" __NAKED__ void NKIdle(TInt)

	{

	asm("hlt");

	asm("ret");

	}

__NAKED__ void InitFpu()

	{

	asm("mov eax, cr0");

	asm("and al, 0xf7");	// enable access to FPU

	asm("mov cr0, eax");

	asm("fninit");

	asm("lea ecx, %a0": : "i"(DefaultCoprocessorState));

	asm("fwait");

	asm("fnsave [ecx]");	// save clean coprocessor state

	asm("fwait");

	asm("or al, 8");

	asm("mov cr0, eax");	// disable access to coprocessor

	asm("ret");

	}

const TLinAddr addressof_CrashState = (TLinAddr)&::CrashState;

const TLinAddr addressof_X86_Regs = (TLinAddr)&::X86_Regs;

const TLinAddr addressof_X86_IrqNestCount = (TLinAddr)&::X86_IrqNestCount;

/** @internalTechnology

	Called to indicate that the system has crashed and all CPUs should be

	halted and should dump their registers.

	Doesn't return

*/

__NAKED__ void NKern::NotifyCrash(const TAny* /*a0*/, TInt /*a1*/)

	{

	asm("pushfd ");

	asm("cli ");

	asm("push ebp ");

	asm("mov ebp, %0" : : "i" (addressof_CrashState));

	asm("mov dword ptr [ebp], 1 ");

	asm("mov ebp, %0" : : "i" (addressof_X86_Regs));

	asm("mov [ebp+%0], eax" : : "i" _FOFF(SFullX86RegSet,iEax));

	asm("mov [ebp+%0], ebx" : : "i" _FOFF(SFullX86RegSet,iEbx));

	asm("mov [ebp+%0], ecx" : : "i" _FOFF(SFullX86RegSet,iEcx));

	asm("mov [ebp+%0], edx" : : "i" _FOFF(SFullX86RegSet,iEdx));

	asm("mov [ebp+%0], esi" : : "i" _FOFF(SFullX86RegSet,iEsi));

	asm("mov [ebp+%0], edi" : : "i" _FOFF(SFullX86RegSet,iEdi));

	asm("pop dword ptr [ebp+%0]" : : "i" _FOFF(SFullX86RegSet,iEbp));			// pushed EBP

	asm("pop dword ptr [ebp+%0]" : : "i" _FOFF(SFullX86RegSet,iEflags));		// pushed EFLAGS

	asm("pop dword ptr [ebp+%0]" : : "i" _FOFF(SFullX86RegSet,iEip));			// return address

	asm("pop dword ptr [ebp+%0]" : : "i" _FOFF(SFullX86RegSet,iFaultCategory));	// a0 parameter

	asm("pop dword ptr [ebp+%0]" : : "i" _FOFF(SFullX86RegSet,iFaultReason));	// a1 parameter

	asm("mov [ebp+%0], esp" : : "i" _FOFF(SFullX86RegSet,iEsp));

	asm("lea eax, [ebp+%0]" : : "i" _FOFF(SFullX86RegSet,iCs));

	asm("mov [eax], cs ");

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

	asm("mov [eax+8], es ");

	asm("mov [eax+12], fs ");

	asm("mov [eax+16], gs ");

	asm("mov [eax+20], ss ");

	asm("mov ebx, %0" : : "i" (addressof_X86_IrqNestCount));

	asm("mov eax, 0x80000000 ");

	asm("lock xchg eax, [ebx] ");

	asm("mov [ebp+%0], eax" : : "i" _FOFF(SFullX86RegSet,iIrqNestCount));

	asm("xor eax, eax ");

	asm("push eax ");

	asm("push eax ");

	asm("push eax ");

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

	asm("pop eax ");

	asm("pop eax ");

	asm("pop eax ");

	asm("push dword ptr [ebp+%0]" : : "i" _FOFF(SFullX86RegSet,iFaultReason));		// a1 parameter

	asm("push dword ptr [ebp+%0]" : : "i" _FOFF(SFullX86RegSet,iFaultCategory));	// a0 parameter

	asm("push 1 ");

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

	asm("int 0xff ");	// shouldn't get here

	}