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// Copyright (c) 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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//
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#include <memmodel.h>
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#include <ramalloc.h>
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#include "mm.h"
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#include "mmu.h"
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#include "mmanager.h"
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#include "mobject.h"
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#include "mpager.h"
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#include "mmapping.h"
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TInt M::RamDefragFault(TAny* /*aExceptionInfo*/)
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{// Defag faults are handled by Mmu::HandlePageFault() on the flexible memory model.
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return KErrAbort;
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}
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EXPORT_C TInt Epoc::MovePhysicalPage(TPhysAddr aOld, TPhysAddr& aNew, TRamDefragPageToMove aPageToMove)
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{
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CHECK_PRECONDITIONS(MASK_THREAD_CRITICAL,"Epoc::MovePhysicalPage");
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__KTRACE_OPT(KMMU,Kern::Printf("Epoc::MovePhysicalPage() old=%08x pageToMove=%d",aOld,aPageToMove));
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// Mark aNew as invalid if a page is moved then this will be updated.
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// However, if the page couldn't be moved or is discarded then it must be invalid.
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aNew = KPhysAddrInvalid;
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TInt r = KErrNotFound;
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switch (aPageToMove)
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{
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case ERamDefragPage_Physical :
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break;
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case ERamDefragPage_PageTable :
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{
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// Assume aOld is a linear address in current thread and get the physical
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// address of the page table that maps it and move that.
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TLinAddr linAddr = (TLinAddr) aOld;
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DMemModelThread* thread = (DMemModelThread*)TheCurrentThread;
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// Get the os asid of current thread's process so no need to open reference on it.
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TUint osAsid = ((DMemModelProcess*)thread->iOwningProcess)->OsAsid();
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TUint offsetInMapping;
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TUint mapInstanceCount;
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DMemoryMapping* mapping = MM::FindMappingInAddressSpace(osAsid,linAddr,1,offsetInMapping,mapInstanceCount);
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if (!mapping)
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return r;
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MmuLock::Lock();
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TUint memoryIndex = (offsetInMapping >> KPageShift)+ mapping->iStartIndex;
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TPte* pte = mapping->FindPageTable(linAddr, memoryIndex);
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if (mapInstanceCount != mapping->MapInstanceCount() || !pte)
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{
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MmuLock::Unlock();
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mapping->Close();
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return r;
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}
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TPhysAddr physAddr = TheMmu.LinearToPhysical((TLinAddr)pte, KKernelOsAsid);
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__NK_ASSERT_DEBUG(physAddr != KPhysAddrInvalid);
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aOld = physAddr; // Have physical address of page table page so move it.
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MmuLock::Unlock();
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mapping->Close();
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break;
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}
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case ERamDefragPage_PageTableInfo :
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{
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// Assume aOld is a linear address in current thread and get physical
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// address of the page table info of the page table that maps it
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// and move that.
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TLinAddr linAddr = (TLinAddr) aOld;
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DMemModelThread* thread = (DMemModelThread*)TheCurrentThread;
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// Get the os asid of current thread's process so no need to open reference on it.
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TUint osAsid = ((DMemModelProcess*)thread->iOwningProcess)->OsAsid();
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TUint offsetInMapping;
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TUint mapInstanceCount;
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DMemoryMapping* mapping = MM::FindMappingInAddressSpace(osAsid,linAddr,1,offsetInMapping,mapInstanceCount);
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if (!mapping)
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return r;
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MmuLock::Lock();
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TUint memoryIndex = (offsetInMapping >> KPageShift)+ mapping->iStartIndex;
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TPte* pte = mapping->FindPageTable(linAddr, memoryIndex);
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if (mapInstanceCount != mapping->MapInstanceCount() || !pte)
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{
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MmuLock::Unlock();
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mapping->Close();
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return r;
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}
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SPageTableInfo* pti = SPageTableInfo::FromPtPtr(pte);
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TPhysAddr physAddr = TheMmu.LinearToPhysical((TLinAddr)pti, KKernelOsAsid);
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__NK_ASSERT_DEBUG(physAddr != KPhysAddrInvalid);
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aOld = physAddr; // Have physical address of page table info page so move it.
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MmuLock::Unlock();
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mapping->Close();
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break;
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}
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default :
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r = KErrNotSupported;
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return r;
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}
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RamAllocLock::Lock();
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// Move the page to any RAM zone.
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r = M::MovePage(aOld, aNew, KRamZoneInvalidId, 0);
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RamAllocLock::Unlock();
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return r;
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}
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TInt M::MovePage(TPhysAddr aOld, TPhysAddr& aNew, TUint aBlockZoneId, TUint aMoveDisFlags)
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{
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// Returns this when page is not paged or managed or free but is a real RAM page.
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TInt r = KErrNotSupported;
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0
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// get memory object corresponding to the page...
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DMemoryObject* memory = 0;
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MmuLock::Lock();
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SPageInfo* pi = SPageInfo::SafeFromPhysAddr(aOld & ~KPageMask);
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if (pi)
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{
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if (pi->PagedState() != SPageInfo::EUnpaged)
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{// The page is paged so let the pager handle it.
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return ThePager.DiscardPage(pi, aBlockZoneId, aMoveDisFlags);
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}
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switch (pi->Type())
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{
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case SPageInfo::EManaged:
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memory = pi->Owner();
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memory->Open();
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// move page, this will release the mmu lock.
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r = memory->iManager->MovePage( memory, pi, aNew, aBlockZoneId,
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(aMoveDisFlags & M::EMoveDisBlockRest)!=0);
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memory->AsyncClose();
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break;
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case SPageInfo::EUnused:
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r = KErrNotFound; // This page is free so nothing to do.
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// Fall through..
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default:
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MmuLock::Unlock();
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}
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}
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else
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{// page info for aOld not found so aOld is not a RAM page...
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MmuLock::Unlock();
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r = KErrArgument;
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}
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return r;
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}
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TInt M::MoveAndAllocPage(TPhysAddr aAddr, TZonePageType aPageType)
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{
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// Returns this when page is not paged or managed or free but is a real RAM page.
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TInt r = KErrNotSupported;
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// get memory object corresponding to the page...
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DMemoryObject* memory = 0;
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MmuLock::Lock();
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SPageInfo* pi = SPageInfo::SafeFromPhysAddr(aAddr & ~KPageMask);
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if(pi)
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{
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if (pi->PagedState() != SPageInfo::EUnpaged)
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{// The page is paged so let the pager handle it.
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return ThePager.DiscardAndAllocPage(pi, aPageType);
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}
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switch (pi->Type())
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{
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case SPageInfo::EManaged:
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memory = pi->Owner();
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memory->Open();
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// move page, this will release the mmu lock.
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r = memory->iManager->MoveAndAllocPage(memory, pi, aPageType);
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memory->AsyncClose();
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break;
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case SPageInfo::EUnused:
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r = KErrNone; // This page is free so nothing to do.
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// Fall through..
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default:
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MmuLock::Unlock();
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}
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}
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else
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{// page info for aAddr not found so aAddr is not a RAM page...
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MmuLock::Unlock();
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r = KErrArgument;
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}
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return r;
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}
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