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// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of the License "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// e32\memmodel\epoc\multiple\x86\xmmu.cia
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//
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//
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#include <x86_mem.h>
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#if defined(KMMU)
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extern "C" void __DebugMsgFlushTLB();
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extern "C" void __DebugMsgLocalFlushTLB();
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extern "C" void __DebugMsgTotalFlushTLB();
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extern "C" void __DebugMsgINVLPG(int a);
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#endif
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extern "C"
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{
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__NAKED__ void __fastcall DoInvalidateTLBForPage(TLinAddr /*aLinAddr*/)
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//
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// Flush a specified virtual address from the TLB.
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//
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{
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ASM_DEBUG1(INVLPG,ecx)
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asm("invlpg [ecx]");
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asm("ret");
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}
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// On 486 and Pentium this invalidates all TLB entries.
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// On P6 and later CPUs it only invalidates non-global TLB entries.
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__NAKED__ void DoLocalInvalidateTLB()
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{
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ASM_DEBUG0(LocalFlushTLB)
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asm("mov eax, cr3");
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asm("mov cr3, eax");
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asm("ret");
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}
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// This function is only used on P6 and later CPUs.
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// It invalidates all TLB entries, including global ones.
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extern "C" __NAKED__ void DoTotalInvalidateTLB()
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{
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ASM_DEBUG0(TotalFlushTLB)
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asm("pushfd");
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asm("mov eax, cr3");
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MOV_ECX_CR4;
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asm("mov edx, ecx");
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asm("and dl, 0x7f");
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asm("cli");
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MOV_CR4_EDX;
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asm("mov cr3, eax");
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MOV_CR4_ECX;
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asm("popfd");
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asm("ret");
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}
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// Invalidate all TLB entries regardless of CPU type.
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__NAKED__ void DoInvalidateTLB()
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{
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ASM_DEBUG0(FlushTLB)
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asm("mov edx, [%a0]": : "i"(&X86_UseGlobalPTEs));
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asm("mov eax, cr3");
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asm("cmp edx, 0");
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asm("jz no_global_pages");
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MOV_ECX_CR4;
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asm("mov edx, ecx");
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asm("and dl, 0x7f");
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asm("pushfd");
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asm("cli");
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MOV_CR4_EDX;
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asm("mov cr3, eax");
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MOV_CR4_ECX;
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asm("popfd");
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asm("ret");
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asm("no_global_pages:");
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asm("mov cr3, eax");
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asm("ret");
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}
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}
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__NAKED__ void DMemModelThread::RestoreAddressSpace()
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{
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#ifndef __SMP__
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//SMP FIXME
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asm("mov eax, [%a0]": : "i"(&TheScheduler.iCurrentThread));
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// edx = current thread owning process...
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asm("mov edx, 0");
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asm("lea edx, [edx+%0]": : "i"_FOFF(DThread,iNThread));
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asm("neg edx");
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asm("mov edx, [eax+edx+%0]": : "i"_FOFF(DThread,iOwningProcess));
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// update page directory and address space values...
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asm("cli");
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asm("mov [%a0], edx": :"i"(&TheScheduler.iAddressSpace));
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asm("mov [eax+%0], edx": : "i"_FOFF(NThreadBase,iAddressSpace));
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asm("mov edx, [edx+%0]": : "i"_FOFF(DMemModelProcess,iGlobalPageDir));
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asm("mov cr3, edx");
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asm("sti");
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#endif
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asm("ret");
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}
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