// 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\memmodel\epoc\multiple\x86\xmmu.cia

 // 

 //

 #include <x86_mem.h>

 #if defined(KMMU)

 extern "C" void __DebugMsgFlushTLB();

 extern "C" void __DebugMsgLocalFlushTLB();

 extern "C" void __DebugMsgTotalFlushTLB();

 extern "C" void __DebugMsgINVLPG(int a);

 #endif

 extern "C"

 {

 __NAKED__ void __fastcall DoInvalidateTLBForPage(TLinAddr /*aLinAddr*/)

 //

 // Flush a specified virtual address from the TLB.

 //

 	{

 	ASM_DEBUG1(INVLPG,ecx)

 	asm("invlpg [ecx]");

 	asm("ret");

 	}

 // On 486 and Pentium this invalidates all TLB entries.

 // On P6 and later CPUs it only invalidates non-global TLB entries.

 __NAKED__ void DoLocalInvalidateTLB()

 	{

 	ASM_DEBUG0(LocalFlushTLB)

 	asm("mov eax, cr3");

 	asm("mov cr3, eax");

 	asm("ret");

 	}

 // This function is only used on P6 and later CPUs.

 // It invalidates all TLB entries, including global ones.

 extern "C" __NAKED__ void DoTotalInvalidateTLB()

 	{

 	ASM_DEBUG0(TotalFlushTLB)

 	asm("pushfd");

 	asm("mov eax, cr3");

 	MOV_ECX_CR4;

 	asm("mov edx, ecx");

 	asm("and dl, 0x7f");

 	asm("cli");

 	MOV_CR4_EDX;

 	asm("mov cr3, eax");

 	MOV_CR4_ECX;

 	asm("popfd");

 	asm("ret");

 	}

 // Invalidate all TLB entries regardless of CPU type.

 __NAKED__ void DoInvalidateTLB()

 	{

 	ASM_DEBUG0(FlushTLB)

 	asm("mov edx, [%a0]": : "i"(&X86_UseGlobalPTEs));

 	asm("mov eax, cr3");

 	asm("cmp edx, 0");

 	asm("jz no_global_pages");

 	MOV_ECX_CR4;

 	asm("mov edx, ecx");

 	asm("and dl, 0x7f");

 	asm("pushfd");

 	asm("cli");

 	MOV_CR4_EDX;

 	asm("mov cr3, eax");

 	MOV_CR4_ECX;

 	asm("popfd");

 	asm("ret");

 	asm("no_global_pages:");

 	asm("mov cr3, eax");

 	asm("ret");

 	}

 }

 __NAKED__ void DMemModelThread::RestoreAddressSpace()

 	{

 #ifndef __SMP__

 	//SMP FIXME

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

 	// edx = current thread owning process...

 	asm("mov edx, 0");

 	asm("lea edx, [edx+%0]": : "i"_FOFF(DThread,iNThread));

 	asm("neg edx");

 	asm("mov edx, [eax+edx+%0]": : "i"_FOFF(DThread,iOwningProcess));

 	// update page directory and address space values...

 	asm("cli");

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

 	asm("mov [eax+%0], edx": : "i"_FOFF(NThreadBase,iAddressSpace));

 	asm("mov edx, [edx+%0]": : "i"_FOFF(DMemModelProcess,iGlobalPageDir));

 	asm("mov cr3, edx");

 	asm("sti");

 #endif

 	asm("ret");

 	}