1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/kernelhwsrv/kernel/eka/memmodel/epoc/multiple/x86/xmmu.cia	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,117 @@
     1.4 +// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of the License "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +// e32\memmodel\epoc\multiple\x86\xmmu.cia
    1.18 +// 
    1.19 +//
    1.20 +
    1.21 +#include <x86_mem.h>
    1.22 +
    1.23 +#if defined(KMMU)
    1.24 +extern "C" void __DebugMsgFlushTLB();
    1.25 +extern "C" void __DebugMsgLocalFlushTLB();
    1.26 +extern "C" void __DebugMsgTotalFlushTLB();
    1.27 +extern "C" void __DebugMsgINVLPG(int a);
    1.28 +#endif
    1.29 +
    1.30 +
    1.31 +extern "C"
    1.32 +{
    1.33 +
    1.34 +
    1.35 +__NAKED__ void __fastcall DoInvalidateTLBForPage(TLinAddr /*aLinAddr*/)
    1.36 +//
    1.37 +// Flush a specified virtual address from the TLB.
    1.38 +//
    1.39 +	{
    1.40 +	ASM_DEBUG1(INVLPG,ecx)
    1.41 +	asm("invlpg [ecx]");
    1.42 +	asm("ret");
    1.43 +	}
    1.44 +
    1.45 +// On 486 and Pentium this invalidates all TLB entries.
    1.46 +// On P6 and later CPUs it only invalidates non-global TLB entries.
    1.47 +__NAKED__ void DoLocalInvalidateTLB()
    1.48 +	{
    1.49 +	ASM_DEBUG0(LocalFlushTLB)
    1.50 +	asm("mov eax, cr3");
    1.51 +	asm("mov cr3, eax");
    1.52 +	asm("ret");
    1.53 +	}
    1.54 +
    1.55 +// This function is only used on P6 and later CPUs.
    1.56 +// It invalidates all TLB entries, including global ones.
    1.57 +extern "C" __NAKED__ void DoTotalInvalidateTLB()
    1.58 +	{
    1.59 +	ASM_DEBUG0(TotalFlushTLB)
    1.60 +	asm("pushfd");
    1.61 +	asm("mov eax, cr3");
    1.62 +	MOV_ECX_CR4;
    1.63 +	asm("mov edx, ecx");
    1.64 +	asm("and dl, 0x7f");
    1.65 +	asm("cli");
    1.66 +	MOV_CR4_EDX;
    1.67 +	asm("mov cr3, eax");
    1.68 +	MOV_CR4_ECX;
    1.69 +	asm("popfd");
    1.70 +	asm("ret");
    1.71 +	}
    1.72 +
    1.73 +// Invalidate all TLB entries regardless of CPU type.
    1.74 +__NAKED__ void DoInvalidateTLB()
    1.75 +	{
    1.76 +	ASM_DEBUG0(FlushTLB)
    1.77 +	asm("mov edx, [%a0]": : "i"(&X86_UseGlobalPTEs));
    1.78 +	asm("mov eax, cr3");
    1.79 +	asm("cmp edx, 0");
    1.80 +	asm("jz no_global_pages");
    1.81 +	MOV_ECX_CR4;
    1.82 +	asm("mov edx, ecx");
    1.83 +	asm("and dl, 0x7f");
    1.84 +	asm("pushfd");
    1.85 +	asm("cli");
    1.86 +	MOV_CR4_EDX;
    1.87 +	asm("mov cr3, eax");
    1.88 +	MOV_CR4_ECX;
    1.89 +	asm("popfd");
    1.90 +	asm("ret");
    1.91 +	asm("no_global_pages:");
    1.92 +	asm("mov cr3, eax");
    1.93 +	asm("ret");
    1.94 +	}
    1.95 +}
    1.96 +
    1.97 +__NAKED__ void DMemModelThread::RestoreAddressSpace()
    1.98 +	{
    1.99 +#ifndef __SMP__
   1.100 +	//SMP FIXME
   1.101 +	asm("mov eax, [%a0]": : "i"(&TheScheduler.iCurrentThread));
   1.102 +
   1.103 +	// edx = current thread owning process...
   1.104 +	asm("mov edx, 0");
   1.105 +	asm("lea edx, [edx+%0]": : "i"_FOFF(DThread,iNThread));
   1.106 +	asm("neg edx");
   1.107 +	asm("mov edx, [eax+edx+%0]": : "i"_FOFF(DThread,iOwningProcess));
   1.108 +
   1.109 +	// update page directory and address space values...
   1.110 +	asm("cli");
   1.111 +	asm("mov [%a0], edx": :"i"(&TheScheduler.iAddressSpace));
   1.112 +	asm("mov [eax+%0], edx": : "i"_FOFF(NThreadBase,iAddressSpace));
   1.113 +	asm("mov edx, [edx+%0]": : "i"_FOFF(DMemModelProcess,iGlobalPageDir));
   1.114 +	asm("mov cr3, edx");
   1.115 +	asm("sti");
   1.116 +#endif
   1.117 +	asm("ret");
   1.118 +	}
   1.119 +
   1.120 +