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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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//
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#include <plat_priv.h>
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#include "mm.h"
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#include "mmu.h"
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#include "mmapping.h"
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#include "mobject.h"
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#include "maddressspace.h"
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#include "mptalloc.h"
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#include "mmanager.h" // needed for DMemoryManager::Pin/Unpin, not nice, but no obvious way to break dependency
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#include "cache_maintenance.inl"
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//
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// DMemoryMapping
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//
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DMemoryMapping::DMemoryMapping(TUint aType)
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: DMemoryMappingBase(aType)
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{
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}
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TInt DMemoryMapping::Construct(TMemoryAttributes aAttributes, TMappingCreateFlags aFlags, TInt aOsAsid, TLinAddr aAddr, TUint aSize, TLinAddr aColourOffset)
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{
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TRACE(("DMemoryMapping[0x%08x]::Construct(0x%x,0x%x,%d,0x%08x,0x%08x,0x%08x)",this,(TUint32&)aAttributes,aFlags,aOsAsid,aAddr,aSize,aColourOffset));
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// setup PDE values...
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iBlankPde = Mmu::BlankPde(aAttributes);
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// setup flags...
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if(aFlags&EMappingCreateReserveAllResources)
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Flags() |= EPermanentPageTables;
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// allocate virtual memory...
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TInt r = AllocateVirtualMemory(aFlags,aOsAsid,aAddr,aSize,aColourOffset);
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if(r==KErrNone)
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{
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// add to address space...
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TLinAddr addr = iAllocatedLinAddrAndOsAsid&~KPageMask;
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TInt osAsid = iAllocatedLinAddrAndOsAsid&KPageMask;
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r = AddressSpace[osAsid]->AddMapping(addr,this);
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if(r!=KErrNone)
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FreeVirtualMemory();
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}
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return r;
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}
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DMemoryMapping::~DMemoryMapping()
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{
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TRACE(("DMemoryMapping[0x%08x]::~DMemoryMapping()",this));
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__NK_ASSERT_DEBUG(!IsAttached());
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// remove from address space...
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TLinAddr addr = iAllocatedLinAddrAndOsAsid&~KPageMask;
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TInt osAsid = iAllocatedLinAddrAndOsAsid&KPageMask;
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TAny* removed = AddressSpace[osAsid]->RemoveMapping(addr);
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if(removed)
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__NK_ASSERT_DEBUG(removed==this);
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FreeVirtualMemory();
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}
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void DMemoryMapping::BTraceCreate()
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{
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MmuLock::Lock();
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TUint32 data[4] = { iStartIndex, iSizeInPages, OsAsid(), Base() };
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BTraceContextN(BTrace::EFlexibleMemModel,BTrace::EMemoryMappingCreate,this,Memory(),data,sizeof(data));
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MmuLock::Unlock();
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}
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TInt DMemoryMapping::Map(DMemoryObject* aMemory, TUint aIndex, TUint aCount, TMappingPermissions aPermissions)
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{
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TRACE(("DMemoryMapping[0x%08x]::Map(0x%08x,0x%x,0x%x,0x%08x)",this,aMemory,aIndex,aCount,aPermissions));
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__NK_ASSERT_DEBUG(!IsAttached());
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// check reserved resources are compatible (memory objects with reserved resources
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// don't expect to have to allocate memory when mapping new pages),,,
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if(aMemory->iFlags&DMemoryObject::EReserveResources && !(Flags()&EPermanentPageTables))
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return KErrArgument;
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// check arguments for coarse mappings...
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if(IsCoarse())
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{
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if(!aMemory->IsCoarse())
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return KErrArgument;
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if((aCount|aIndex)&(KChunkMask>>KPageShift))
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return KErrArgument;
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}
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TLinAddr base = iAllocatedLinAddrAndOsAsid&~KPageMask;
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#ifdef _DEBUG
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TUint osAsid = iAllocatedLinAddrAndOsAsid&KPageMask;
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#endif
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// check user/supervisor memory partitioning...
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if(base<KUserMemoryLimit != (bool)(aPermissions&EUser))
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return KErrAccessDenied;
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// check mapping doesn't straddle KGlobalMemoryBase or KUserMemoryLimit...
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__NK_ASSERT_DEBUG(TUint(KGlobalMemoryBase-base)==0 || TUint(KGlobalMemoryBase-base)>=TUint(aCount<<KPageShift));
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__NK_ASSERT_DEBUG(TUint(KUserMemoryLimit-base)==0 || TUint(KUserMemoryLimit-base)>=TUint(aCount<<KPageShift));
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// setup attributes...
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TBool global = base>=KGlobalMemoryBase;
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__NK_ASSERT_DEBUG(global || osAsid!=(TInt)KKernelOsAsid); // prevent non-global memory in kernel process
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PteType() = Mmu::PteType(aPermissions,global);
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iBlankPte = Mmu::BlankPte(aMemory->Attributes(),PteType());
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// setup base address...
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TUint colourOffset = ((aIndex&KPageColourMask)<<KPageShift);
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if(colourOffset+aCount*KPageSize > iAllocatedSize)
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return KErrTooBig;
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__NK_ASSERT_DEBUG(!iLinAddrAndOsAsid || ((iLinAddrAndOsAsid^iAllocatedLinAddrAndOsAsid)&~(KPageColourMask<<KPageShift))==0); // new, OR, only differ in page colour
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iLinAddrAndOsAsid = iAllocatedLinAddrAndOsAsid+colourOffset;
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// attach to memory object...
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TInt r = Attach(aMemory,aIndex,aCount);
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// cleanup if error...
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if(r!=KErrNone)
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iLinAddrAndOsAsid = 0;
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return r;
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}
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void DMemoryMapping::Unmap()
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{
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Detach();
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// we can't clear iLinAddrAndOsAsid here because this may be needed by other code,
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// e.g. DFineMapping::MapPages/UnmapPages/RestrictPages/PageIn
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}
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TInt DMemoryMapping::AllocateVirtualMemory(TMappingCreateFlags aFlags, TInt aOsAsid, TLinAddr aAddr, TUint aSize, TLinAddr aColourOffset)
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{
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TRACE(("DMemoryMapping[0x%08x]::AllocateVirtualMemory(0x%x,%d,0x%08x,0x%08x,0x%08x)",this,aFlags,aOsAsid,aAddr,aSize,aColourOffset));
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__NK_ASSERT_DEBUG((aAddr&KPageMask)==0);
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__NK_ASSERT_DEBUG(!iAllocatedLinAddrAndOsAsid);
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__NK_ASSERT_DEBUG(!iAllocatedSize);
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// setup PDE type...
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TUint pdeType = 0;
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if(aFlags&EMappingCreateCommonVirtual)
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pdeType |= EVirtualSlabTypeCommonVirtual;
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if(aFlags&EMappingCreateDemandPaged)
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pdeType |= EVirtualSlabTypeDemandPaged;
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TInt r;
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TUint colourOffset = aColourOffset&(KPageColourMask<<KPageShift);
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TLinAddr addr;
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TUint size;
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if(aFlags&(EMappingCreateFixedVirtual|EMappingCreateAdoptVirtual))
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{
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// just use the supplied virtual address...
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__NK_ASSERT_ALWAYS(aAddr);
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__NK_ASSERT_ALWAYS(colourOffset==0);
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__NK_ASSERT_DEBUG((aFlags&EMappingCreateAdoptVirtual)==0 || AddressSpace[aOsAsid]->CheckPdeType(aAddr,aSize,pdeType));
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addr = aAddr;
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size = aSize;
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r = KErrNone;
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}
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else
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{
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if(aFlags&(EMappingCreateExactVirtual|EMappingCreateCommonVirtual))
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{
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__NK_ASSERT_ALWAYS(aAddr); // address must be specified
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}
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else
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{
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__NK_ASSERT_ALWAYS(!aAddr); // address shouldn't have been specified
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}
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// adjust for colour...
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TUint allocSize = aSize+colourOffset;
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TUint allocAddr = aAddr;
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if(allocAddr)
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{
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allocAddr -= colourOffset;
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if(allocAddr&(KPageColourMask<<KPageShift))
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return KErrArgument; // wrong colour
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}
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// allocate virtual addresses...
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if(aFlags&EMappingCreateUserGlobalVirtual)
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{
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if(aOsAsid!=(TInt)KKernelOsAsid)
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return KErrArgument;
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r = DAddressSpace::AllocateUserGlobalVirtualMemory(addr,size,allocAddr,allocSize,pdeType);
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}
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else
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r = AddressSpace[aOsAsid]->AllocateVirtualMemory(addr,size,allocAddr,allocSize,pdeType);
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}
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if(r==KErrNone)
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{
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iAllocatedLinAddrAndOsAsid = addr|aOsAsid;
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iAllocatedSize = size;
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}
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TRACE(("DMemoryMapping[0x%08x]::AllocateVirtualMemory returns %d address=0x%08x",this,r,addr));
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return r;
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}
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void DMemoryMapping::FreeVirtualMemory()
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{
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if(!iAllocatedSize)
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return; // no virtual memory to free
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TRACE(("DMemoryMapping[0x%08x]::FreeVirtualMemory()",this));
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iLinAddrAndOsAsid = 0;
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TLinAddr addr = iAllocatedLinAddrAndOsAsid&~KPageMask;
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TInt osAsid = iAllocatedLinAddrAndOsAsid&KPageMask;
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AddressSpace[osAsid]->FreeVirtualMemory(addr,iAllocatedSize);
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iAllocatedLinAddrAndOsAsid = 0;
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iAllocatedSize = 0;
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}
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//
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// DCoarseMapping
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//
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DCoarseMapping::DCoarseMapping()
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: DMemoryMapping(ECoarseMapping)
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{
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}
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DCoarseMapping::DCoarseMapping(TUint aFlags)
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: DMemoryMapping(ECoarseMapping|aFlags)
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{
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}
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DCoarseMapping::~DCoarseMapping()
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{
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}
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TInt DCoarseMapping::DoMap()
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{
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TRACE(("DCoarseMapping[0x%08x]::DoMap()", this));
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__NK_ASSERT_DEBUG(((iStartIndex|iSizeInPages)&(KChunkMask>>KPageShift))==0); // be extra paranoid about alignment
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MmuLock::Lock();
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TPde* pPde = Mmu::PageDirectoryEntry(OsAsid(),Base());
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DCoarseMemory* memory = (DCoarseMemory*)Memory(true); // safe because we're called from code which has added mapping to memory
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TUint flash = 0;
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TUint chunk = iStartIndex >> KPagesInPDEShift;
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TUint endChunk = (iStartIndex + iSizeInPages) >> KPagesInPDEShift;
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TBool sectionMappingsBroken = EFalse;
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while(chunk < endChunk)
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{
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MmuLock::Flash(flash,KMaxPdesInOneGo*2);
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TPte* pt = memory->GetPageTable(PteType(), chunk);
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if(!pt)
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{
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TRACE2(("!PDE %x=%x (was %x)",pPde,KPdeUnallocatedEntry,*pPde));
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__NK_ASSERT_DEBUG(*pPde==KPdeUnallocatedEntry);
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}
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else
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{
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TPde pde = Mmu::PageTablePhysAddr(pt)|iBlankPde;
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TRACE2(("!PDE %x=%x (was %x)",pPde,pde,*pPde));
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if (Mmu::PdeMapsSection(*pPde))
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{
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// break previous section mapping...
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__NK_ASSERT_DEBUG(*pPde==Mmu::PageToSectionEntry(pt[0],iBlankPde));
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sectionMappingsBroken = ETrue;
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}
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else
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__NK_ASSERT_DEBUG(*pPde==KPdeUnallocatedEntry || ((*pPde^pde)&~KPdeMatchMask)==0);
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*pPde = pde;
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SinglePdeUpdated(pPde);
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flash += 3; // increase flash rate because we've done quite a bit more work
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}
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++pPde;
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++chunk;
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}
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MmuLock::Unlock();
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if (sectionMappingsBroken)
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{
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// We must invalidate the TLB since we broke section mappings created by the bootstrap.
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// Since this will only ever happen on boot, we just invalidate the entire TLB for this
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// process.
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InvalidateTLBForAsid(OsAsid());
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}
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return KErrNone;
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}
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void DCoarseMapping::DoUnmap()
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{
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TRACE(("DCoarseMapping[0x%08x]::DoUnmap()", this));
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MmuLock::Lock();
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TPde* pPde = Mmu::PageDirectoryEntry(OsAsid(),Base());
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TPde* pPdeEnd = pPde+(iSizeInPages>>(KChunkShift-KPageShift));
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TUint flash = 0;
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do
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{
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MmuLock::Flash(flash,KMaxPdesInOneGo);
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TPde pde = KPdeUnallocatedEntry;
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TRACE2(("!PDE %x=%x",pPde,pde));
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*pPde = pde;
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SinglePdeUpdated(pPde);
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++pPde;
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}
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while(pPde<pPdeEnd);
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MmuLock::Unlock();
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InvalidateTLBForAsid(OsAsid());
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}
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TInt DCoarseMapping::MapPages(RPageArray::TIter aPages, TUint aMapInstanceCount)
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{
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// shouldn't ever be called because coarse mappings don't have their own page tables...
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__NK_ASSERT_DEBUG(0);
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return KErrNotSupported;
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}
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|
347 |
|
|
|
348 |
|
|
|
349 |
void DCoarseMapping::UnmapPages(RPageArray::TIter aPages, TUint aMapInstanceCount)
|
|
|
350 |
{
|
|
|
351 |
// shouldn't ever be called because coarse mappings don't have their own page tables...
|
|
|
352 |
__NK_ASSERT_DEBUG(0);
|
|
|
353 |
}
|
|
|
354 |
|
|
|
355 |
void DCoarseMapping::RemapPage(TPhysAddr& aPageArray, TUint aIndex, TUint aMapInstanceCount, TBool aInvalidateTLB)
|
|
|
356 |
{
|
|
|
357 |
// shouldn't ever be called because coarse mappings don't have their own page tables...
|
|
|
358 |
__NK_ASSERT_DEBUG(0);
|
|
|
359 |
}
|
|
|
360 |
|
|
|
361 |
void DCoarseMapping::RestrictPagesNA(RPageArray::TIter aPages, TUint aMapInstanceCount)
|
|
|
362 |
{
|
|
|
363 |
// shouldn't ever be called because coarse mappings don't have their own page tables...
|
|
|
364 |
__NK_ASSERT_DEBUG(0);
|
|
|
365 |
}
|
|
|
366 |
|
|
|
367 |
|
|
|
368 |
TInt DCoarseMapping::PageIn(RPageArray::TIter aPages, TPinArgs& aPinArgs, TUint aMapInstanceCount)
|
|
|
369 |
{
|
|
|
370 |
MmuLock::Lock();
|
|
|
371 |
|
|
|
372 |
if(!IsAttached())
|
|
|
373 |
{
|
|
|
374 |
MmuLock::Unlock();
|
|
|
375 |
return KErrNotFound;
|
|
|
376 |
}
|
|
|
377 |
|
|
|
378 |
DCoarseMemory* memory = (DCoarseMemory*)Memory(true); // safe because we've checked mapping IsAttached
|
|
|
379 |
return memory->PageIn(this, aPages, aPinArgs, aMapInstanceCount);
|
|
|
380 |
}
|
|
|
381 |
|
|
|
382 |
|
|
|
383 |
TBool DCoarseMapping::MovingPageIn(TPhysAddr& aPageArrayPtr, TUint aIndex)
|
|
|
384 |
{
|
|
|
385 |
__NK_ASSERT_DEBUG(MmuLock::IsHeld());
|
|
|
386 |
__NK_ASSERT_DEBUG(IsAttached());
|
|
|
387 |
|
|
|
388 |
DCoarseMemory* memory = (DCoarseMemory*)Memory(true); // safe because we've checked mapping IsAttached
|
|
|
389 |
TBool success = memory->MovingPageIn(this, aPageArrayPtr, aIndex);
|
|
|
390 |
if (success)
|
|
|
391 |
{
|
|
|
392 |
TLinAddr addr = Base() + (aIndex - iStartIndex) * KPageSize;
|
|
|
393 |
InvalidateTLBForPage(addr);
|
|
|
394 |
}
|
|
|
395 |
return success;
|
|
|
396 |
}
|
|
|
397 |
|
|
|
398 |
|
|
|
399 |
TPte* DCoarseMapping::FindPageTable(TLinAddr aLinAddr, TUint aMemoryIndex)
|
|
|
400 |
{
|
|
|
401 |
TRACE(("DCoarseMapping::FindPageTable(0x%x, %d)", aLinAddr, aMemoryIndex));
|
|
|
402 |
__NK_ASSERT_DEBUG(MmuLock::IsHeld());
|
|
|
403 |
__NK_ASSERT_DEBUG(IsAttached());
|
|
|
404 |
DCoarseMemory* memory = (DCoarseMemory*)Memory(true); // safe because we've checked mapping IsAttached
|
|
|
405 |
return memory->FindPageTable(this, aLinAddr, aMemoryIndex);
|
|
|
406 |
}
|
|
|
407 |
|
|
|
408 |
|
|
|
409 |
|
|
|
410 |
//
|
|
|
411 |
// DFineMapping
|
|
|
412 |
//
|
|
|
413 |
|
|
|
414 |
DFineMapping::DFineMapping()
|
|
|
415 |
: DMemoryMapping(0)
|
|
|
416 |
{
|
|
|
417 |
}
|
|
|
418 |
|
|
|
419 |
|
|
|
420 |
DFineMapping::~DFineMapping()
|
|
|
421 |
{
|
|
|
422 |
TRACE(("DFineMapping[0x%08x]::~DFineMapping()",this));
|
|
|
423 |
FreePermanentPageTables();
|
|
|
424 |
}
|
|
|
425 |
|
|
|
426 |
#ifdef _DEBUG
|
|
|
427 |
void DFineMapping::ValidatePageTable(TPte* aPt, TLinAddr aAddr)
|
|
|
428 |
{
|
|
|
429 |
if(aPt)
|
|
|
430 |
{
|
|
|
431 |
// check page table is correct...
|
|
|
432 |
SPageTableInfo* pti = SPageTableInfo::FromPtPtr(aPt);
|
|
|
433 |
__NK_ASSERT_DEBUG(pti->CheckFine(aAddr&~KChunkMask,OsAsid()));
|
|
|
434 |
DMemoryObject* memory = Memory();
|
|
|
435 |
if(memory)
|
|
|
436 |
{
|
|
|
437 |
if(memory->IsDemandPaged() && !IsPinned() && !(Flags()&EPageTablesAllocated))
|
|
|
438 |
__NK_ASSERT_DEBUG(pti->IsDemandPaged());
|
|
|
439 |
else
|
|
|
440 |
__NK_ASSERT_DEBUG(!pti->IsDemandPaged());
|
|
|
441 |
}
|
|
|
442 |
}
|
|
|
443 |
}
|
|
|
444 |
#endif
|
|
|
445 |
|
|
|
446 |
TPte* DFineMapping::GetPageTable(TLinAddr aAddr)
|
|
|
447 |
{
|
|
|
448 |
__NK_ASSERT_DEBUG(MmuLock::IsHeld());
|
|
|
449 |
|
|
|
450 |
// get address of PDE which refers to the page table...
|
|
|
451 |
TPde* pPde = Mmu::PageDirectoryEntry(OsAsid(),aAddr);
|
|
|
452 |
|
|
|
453 |
// get page table...
|
|
|
454 |
TPte* pt = Mmu::PageTableFromPde(*pPde);
|
|
|
455 |
#ifdef _DEBUG
|
|
|
456 |
ValidatePageTable(pt, aAddr);
|
|
|
457 |
#endif
|
|
|
458 |
return pt;
|
|
|
459 |
}
|
|
|
460 |
|
|
|
461 |
|
|
|
462 |
TPte* DFineMapping::GetOrAllocatePageTable(TLinAddr aAddr)
|
|
|
463 |
{
|
|
|
464 |
__NK_ASSERT_DEBUG(MmuLock::IsHeld());
|
|
|
465 |
|
|
|
466 |
// get address of PDE which refers to the page table...
|
|
|
467 |
TPde* pPde = Mmu::PageDirectoryEntry(OsAsid(),aAddr);
|
|
|
468 |
|
|
|
469 |
// get page table...
|
|
|
470 |
TPte* pt = Mmu::PageTableFromPde(*pPde);
|
|
|
471 |
if(!pt)
|
|
|
472 |
{
|
|
|
473 |
pt = AllocatePageTable(aAddr,pPde);
|
|
|
474 |
#ifdef _DEBUG
|
|
|
475 |
ValidatePageTable(pt, aAddr);
|
|
|
476 |
#endif
|
|
|
477 |
}
|
|
|
478 |
|
|
|
479 |
return pt;
|
|
|
480 |
}
|
|
|
481 |
|
|
|
482 |
|
|
|
483 |
TPte* DFineMapping::GetOrAllocatePageTable(TLinAddr aAddr, TPinArgs& aPinArgs)
|
|
|
484 |
{
|
|
|
485 |
__NK_ASSERT_DEBUG(aPinArgs.iPinnedPageTables);
|
|
|
486 |
|
|
|
487 |
if(!aPinArgs.HaveSufficientPages(KNumPagesToPinOnePageTable))
|
|
|
488 |
return 0;
|
|
|
489 |
|
|
|
490 |
TPte* pinnedPt = 0;
|
|
|
491 |
for(;;)
|
|
|
492 |
{
|
|
|
493 |
TPte* pt = GetOrAllocatePageTable(aAddr);
|
|
|
494 |
|
|
|
495 |
if(pinnedPt && pinnedPt!=pt)
|
|
|
496 |
{
|
|
|
497 |
// previously pinned page table not needed...
|
|
|
498 |
PageTableAllocator::UnpinPageTable(pinnedPt,aPinArgs);
|
|
|
499 |
|
|
|
500 |
// make sure we have memory for next pin attempt...
|
|
|
501 |
MmuLock::Unlock();
|
|
|
502 |
aPinArgs.AllocReplacementPages(KNumPagesToPinOnePageTable);
|
|
|
503 |
MmuLock::Lock();
|
|
|
504 |
if(!aPinArgs.HaveSufficientPages(KNumPagesToPinOnePageTable)) // if out of memory...
|
|
|
505 |
{
|
|
|
506 |
// make sure we free any unneeded page table we allocated...
|
|
|
507 |
if(pt)
|
|
|
508 |
FreePageTable(Mmu::PageDirectoryEntry(OsAsid(),aAddr));
|
|
|
509 |
return 0;
|
|
|
510 |
}
|
|
|
511 |
}
|
|
|
512 |
|
|
|
513 |
if(!pt)
|
|
|
514 |
return 0; // out of memory
|
|
|
515 |
|
|
|
516 |
if(pt==pinnedPt)
|
|
|
517 |
{
|
|
|
518 |
// we got a page table and it was pinned...
|
|
|
519 |
*aPinArgs.iPinnedPageTables++ = pt;
|
|
|
520 |
++aPinArgs.iNumPinnedPageTables;
|
|
|
521 |
return pt;
|
|
|
522 |
}
|
|
|
523 |
|
|
|
524 |
// don't pin page table if it's not paged (e.g. unpaged part of ROM)...
|
|
|
525 |
SPageTableInfo* pti = SPageTableInfo::FromPtPtr(pt);
|
|
|
526 |
if(!pti->IsDemandPaged())
|
|
|
527 |
return pt;
|
|
|
528 |
|
|
|
529 |
// pin the page table...
|
|
|
530 |
pinnedPt = pt;
|
|
|
531 |
PageTableAllocator::PinPageTable(pinnedPt,aPinArgs);
|
|
|
532 |
}
|
|
|
533 |
}
|
|
|
534 |
|
|
|
535 |
|
|
|
536 |
TInt DFineMapping::AllocateVirtualMemory(TMappingCreateFlags aFlags, TInt aOsAsid, TLinAddr aAddr, TUint aSize, TLinAddr aColourOffset)
|
|
|
537 |
{
|
|
|
538 |
TInt r = DMemoryMapping::AllocateVirtualMemory(aFlags,aOsAsid,aAddr,aSize,aColourOffset);
|
|
|
539 |
if(r==KErrNone && (Flags()&EPermanentPageTables))
|
|
|
540 |
{
|
|
|
541 |
r = AllocatePermanentPageTables();
|
|
|
542 |
if(r!=KErrNone)
|
|
|
543 |
FreeVirtualMemory();
|
|
|
544 |
}
|
|
|
545 |
return r;
|
|
|
546 |
}
|
|
|
547 |
|
|
|
548 |
|
|
|
549 |
void DFineMapping::FreeVirtualMemory()
|
|
|
550 |
{
|
|
|
551 |
FreePermanentPageTables();
|
|
|
552 |
DMemoryMapping::FreeVirtualMemory();
|
|
|
553 |
}
|
|
|
554 |
|
|
|
555 |
|
|
|
556 |
TPte* DFineMapping::AllocatePageTable(TLinAddr aAddr, TPde* aPdeAddress, TBool aPermanent)
|
|
|
557 |
{
|
|
|
558 |
TRACE2(("DFineMapping[0x%08x]::AllocatePageTable(0x%08x,0x%08x,%d)",this,aAddr,aPdeAddress,aPermanent));
|
|
|
559 |
|
|
|
560 |
__NK_ASSERT_DEBUG(MmuLock::IsHeld());
|
|
|
561 |
|
|
|
562 |
for(;;)
|
|
|
563 |
{
|
|
|
564 |
// mapping is going, so we don't need a page table any more...
|
|
|
565 |
if(BeingDetached())
|
|
|
566 |
return 0;
|
|
|
567 |
|
|
|
568 |
// get paged state...
|
|
|
569 |
TBool demandPaged = false;
|
|
|
570 |
if(!aPermanent)
|
|
|
571 |
{
|
|
|
572 |
DMemoryObject* memory = Memory();
|
|
|
573 |
__NK_ASSERT_DEBUG(memory); // can't be NULL because not BeingDetached()
|
|
|
574 |
demandPaged = memory->IsDemandPaged();
|
|
|
575 |
}
|
|
|
576 |
|
|
|
577 |
// get page table...
|
|
|
578 |
TPte* pt = Mmu::PageTableFromPde(*aPdeAddress);
|
|
|
579 |
if(pt!=0)
|
|
|
580 |
{
|
|
|
581 |
// we have a page table...
|
|
|
582 |
__NK_ASSERT_DEBUG(SPageTableInfo::FromPtPtr(pt)->CheckFine(aAddr&~KChunkMask,iAllocatedLinAddrAndOsAsid&KPageMask));
|
|
|
583 |
if(aPermanent)
|
|
|
584 |
{
|
|
|
585 |
__NK_ASSERT_DEBUG(BeingDetached()==false);
|
|
|
586 |
__NK_ASSERT_ALWAYS(!demandPaged);
|
|
|
587 |
SPageTableInfo* pti = SPageTableInfo::FromPtPtr(pt);
|
|
|
588 |
pti->IncPermanenceCount();
|
|
|
589 |
}
|
|
|
590 |
return pt;
|
|
|
591 |
}
|
|
|
592 |
|
|
|
593 |
// allocate a new page table...
|
|
|
594 |
MmuLock::Unlock();
|
|
|
595 |
::PageTables.Lock();
|
|
|
596 |
TPte* newPt = ::PageTables.Alloc(demandPaged);
|
|
|
597 |
if(!newPt)
|
|
|
598 |
{
|
|
|
599 |
// out of memory...
|
|
|
600 |
::PageTables.Unlock();
|
|
|
601 |
MmuLock::Lock();
|
|
|
602 |
return 0;
|
|
|
603 |
}
|
|
|
604 |
|
|
|
605 |
// check if new page table is still needed...
|
|
|
606 |
MmuLock::Lock();
|
|
|
607 |
pt = Mmu::PageTableFromPde(*aPdeAddress);
|
|
|
608 |
if(pt)
|
|
|
609 |
{
|
|
|
610 |
// someone else has already allocated a page table,
|
|
|
611 |
// so free the one we just allocated and try again...
|
|
|
612 |
MmuLock::Unlock();
|
|
|
613 |
::PageTables.Free(newPt);
|
|
|
614 |
}
|
|
|
615 |
else if(BeingDetached())
|
|
|
616 |
{
|
|
|
617 |
// mapping is going, so we don't need a page table any more...
|
|
|
618 |
MmuLock::Unlock();
|
|
|
619 |
::PageTables.Free(newPt);
|
|
|
620 |
::PageTables.Unlock();
|
|
|
621 |
MmuLock::Lock();
|
|
|
622 |
return 0;
|
|
|
623 |
}
|
|
|
624 |
else
|
|
|
625 |
{
|
|
|
626 |
// setup new page table...
|
|
|
627 |
SPageTableInfo* pti = SPageTableInfo::FromPtPtr(newPt);
|
|
|
628 |
pti->SetFine(aAddr&~KChunkMask,iAllocatedLinAddrAndOsAsid&KPageMask);
|
|
|
629 |
|
|
|
630 |
TPde pde = Mmu::PageTablePhysAddr(newPt)|iBlankPde;
|
|
|
631 |
TRACE2(("!PDE %x=%x",aPdeAddress,pde));
|
|
|
632 |
__NK_ASSERT_DEBUG(((*aPdeAddress^pde)&~KPdeMatchMask)==0 || *aPdeAddress==KPdeUnallocatedEntry);
|
|
|
633 |
*aPdeAddress = pde;
|
|
|
634 |
SinglePdeUpdated(aPdeAddress);
|
|
|
635 |
|
|
|
636 |
MmuLock::Unlock();
|
|
|
637 |
}
|
|
|
638 |
|
|
|
639 |
// loop back and recheck...
|
|
|
640 |
::PageTables.Unlock();
|
|
|
641 |
MmuLock::Lock();
|
|
|
642 |
}
|
|
|
643 |
}
|
|
|
644 |
|
|
|
645 |
|
|
|
646 |
void DFineMapping::FreePageTable(TPde* aPdeAddress)
|
|
|
647 |
{
|
|
|
648 |
TRACE2(("DFineMapping[0x%08x]::FreePageTable(0x%08x)",this,aPdeAddress));
|
|
|
649 |
|
|
|
650 |
// get page table lock...
|
|
|
651 |
::PageTables.Lock();
|
|
|
652 |
MmuLock::Lock();
|
|
|
653 |
|
|
|
654 |
// find page table...
|
|
|
655 |
TPte* pt = Mmu::PageTableFromPde(*aPdeAddress);
|
|
|
656 |
if(pt)
|
|
|
657 |
{
|
|
|
658 |
SPageTableInfo* pti = SPageTableInfo::FromPtPtr(pt);
|
|
|
659 |
if(pti->PageCount() || pti->PermanenceCount())
|
|
|
660 |
{
|
|
|
661 |
// page table still in use, so don't free it...
|
|
|
662 |
pt = 0;
|
|
|
663 |
}
|
|
|
664 |
else
|
|
|
665 |
{
|
|
|
666 |
// page table not used, so unmap it...
|
|
|
667 |
TPde pde = KPdeUnallocatedEntry;
|
|
|
668 |
TRACE2(("!PDE %x=%x",aPdeAddress,pde));
|
|
|
669 |
*aPdeAddress = pde;
|
|
|
670 |
SinglePdeUpdated(aPdeAddress);
|
|
|
671 |
}
|
|
|
672 |
}
|
|
|
673 |
|
|
|
674 |
MmuLock::Unlock();
|
|
|
675 |
if(pt)
|
|
|
676 |
::PageTables.Free(pt);
|
|
|
677 |
::PageTables.Unlock();
|
|
|
678 |
}
|
|
|
679 |
|
|
|
680 |
|
|
|
681 |
void DFineMapping::RemapPage(TPhysAddr& aPageArray, TUint aIndex, TUint aMapInstanceCount, TBool aInvalidateTLB)
|
|
|
682 |
{
|
|
|
683 |
TRACE2(("DFineMemoryMapping[0x%08x]::RemapPage(0x%x,0x%x,%d,%d)",this,aPageArray,aIndex,aMapInstanceCount,aInvalidateTLB));
|
|
|
684 |
|
|
|
685 |
__NK_ASSERT_DEBUG(aIndex >= iStartIndex);
|
|
|
686 |
__NK_ASSERT_DEBUG(aIndex < iStartIndex + iSizeInPages);
|
|
|
687 |
|
|
|
688 |
TLinAddr addr = Base() + ((aIndex - iStartIndex) << KPageShift);
|
|
|
689 |
TUint pteIndex = (addr >> KPageShift) & (KChunkMask >> KPageShift);
|
|
|
690 |
|
|
|
691 |
// get address of page table...
|
|
|
692 |
MmuLock::Lock();
|
|
|
693 |
TPte* pPte = GetPageTable(addr);
|
|
|
694 |
|
|
|
695 |
// check the page is still mapped and mapping isn't being detached
|
|
|
696 |
// or hasn't been reused for another purpose...
|
|
|
697 |
if(!pPte || BeingDetached() || aMapInstanceCount != MapInstanceCount())
|
|
|
698 |
{
|
|
|
699 |
// can't map pages to this mapping any more so just exit.
|
|
|
700 |
MmuLock::Unlock();
|
|
|
701 |
return;
|
|
|
702 |
}
|
|
|
703 |
|
|
|
704 |
// remap the page...
|
|
|
705 |
pPte += pteIndex;
|
|
|
706 |
Mmu::RemapPage(pPte, aPageArray, iBlankPte);
|
|
|
707 |
MmuLock::Unlock();
|
|
|
708 |
|
|
|
709 |
#ifndef COARSE_GRAINED_TLB_MAINTENANCE
|
|
|
710 |
// clean TLB...
|
|
|
711 |
if (aInvalidateTLB)
|
|
|
712 |
{
|
|
|
713 |
InvalidateTLBForPage(addr + OsAsid());
|
|
|
714 |
}
|
|
|
715 |
#endif
|
|
|
716 |
}
|
|
|
717 |
|
|
|
718 |
|
|
|
719 |
TInt DFineMapping::MapPages(RPageArray::TIter aPages, TUint aMapInstanceCount)
|
|
|
720 |
{
|
|
|
721 |
TRACE2(("DFineMapping[0x%08x]::MapPages(?,%d) index=0x%x count=0x%x",this,aMapInstanceCount,aPages.Index(),aPages.Count()));
|
|
|
722 |
|
|
|
723 |
__NK_ASSERT_DEBUG(aPages.Count());
|
|
|
724 |
__NK_ASSERT_DEBUG(aPages.Index()>=iStartIndex);
|
|
|
725 |
__NK_ASSERT_DEBUG(aPages.IndexEnd()-iStartIndex<=iSizeInPages);
|
|
|
726 |
|
|
|
727 |
TLinAddr addr = Base()+(aPages.Index()-iStartIndex)*KPageSize;
|
|
|
728 |
for(;;)
|
|
|
729 |
{
|
|
|
730 |
TUint pteIndex = (addr>>KPageShift)&(KChunkMask>>KPageShift);
|
|
|
731 |
|
|
|
732 |
// calculate max number of pages to do...
|
|
|
733 |
TUint n = (KChunkSize>>KPageShift)-pteIndex; // pages left in page table
|
|
|
734 |
if(n>KMaxPagesInOneGo)
|
|
|
735 |
n = KMaxPagesInOneGo;
|
|
|
736 |
|
|
|
737 |
// get some pages...
|
|
|
738 |
TPhysAddr* pages;
|
|
|
739 |
n = aPages.Pages(pages,n);
|
|
|
740 |
if(!n)
|
|
|
741 |
break;
|
|
|
742 |
|
|
|
743 |
// get address of page table...
|
|
|
744 |
MmuLock::Lock();
|
|
|
745 |
TPte* pPte = GetOrAllocatePageTable(addr);
|
|
|
746 |
|
|
|
747 |
// check mapping isn't being unmapped, or been reused for another purpose...
|
|
|
748 |
if(BeingDetached() || aMapInstanceCount!=MapInstanceCount())
|
|
|
749 |
{
|
|
|
750 |
// can't map pages to this mapping any more, so free any page table
|
|
|
751 |
// we just got (if it's not used)...
|
|
|
752 |
if(!pPte)
|
|
|
753 |
MmuLock::Unlock();
|
|
|
754 |
else
|
|
|
755 |
{
|
|
|
756 |
SPageTableInfo* pti = SPageTableInfo::FromPtPtr(pPte);
|
|
|
757 |
TBool keepPt = pti->PermanenceCount() || pti->PageCount();
|
|
|
758 |
MmuLock::Unlock();
|
|
|
759 |
if(!keepPt)
|
|
|
760 |
FreePageTable(Mmu::PageDirectoryEntry(OsAsid(),addr));
|
|
|
761 |
}
|
|
|
762 |
// then end...
|
|
|
763 |
return KErrNone;
|
|
|
764 |
}
|
|
|
765 |
|
|
|
766 |
// check for OOM...
|
|
|
767 |
if(!pPte)
|
|
|
768 |
{
|
|
|
769 |
MmuLock::Unlock();
|
|
|
770 |
return KErrNoMemory;
|
|
|
771 |
}
|
|
|
772 |
|
|
|
773 |
// map some pages...
|
|
|
774 |
pPte += pteIndex;
|
|
|
775 |
TBool keepPt = Mmu::MapPages(pPte, n, pages, iBlankPte);
|
|
|
776 |
MmuLock::Unlock();
|
|
|
777 |
|
|
|
778 |
// free page table if no longer needed...
|
|
|
779 |
if(!keepPt)
|
|
|
780 |
FreePageTable(Mmu::PageDirectoryEntry(OsAsid(),addr));
|
|
|
781 |
|
|
|
782 |
// move on...
|
|
|
783 |
aPages.Skip(n);
|
|
|
784 |
addr += n*KPageSize;
|
|
|
785 |
}
|
|
|
786 |
|
|
|
787 |
return KErrNone;
|
|
|
788 |
}
|
|
|
789 |
|
|
|
790 |
|
|
|
791 |
void DFineMapping::UnmapPages(RPageArray::TIter aPages, TUint aMapInstanceCount)
|
|
|
792 |
{
|
|
|
793 |
TRACE2(("DFineMapping[0x%08x]::UnmapPages(?,%d) index=0x%x count=0x%x",this,aMapInstanceCount,aPages.Index(),aPages.Count()));
|
|
|
794 |
|
|
|
795 |
__NK_ASSERT_DEBUG(aPages.Count());
|
|
|
796 |
|
|
|
797 |
TLinAddr addr = Base()+(aPages.Index()-iStartIndex)*KPageSize;
|
|
|
798 |
#ifndef COARSE_GRAINED_TLB_MAINTENANCE
|
|
|
799 |
TLinAddr startAddr = addr;
|
|
|
800 |
#endif
|
|
|
801 |
for(;;)
|
|
|
802 |
{
|
|
|
803 |
TUint pteIndex = (addr>>KPageShift)&(KChunkMask>>KPageShift);
|
|
|
804 |
|
|
|
805 |
// calculate max number of pages to do...
|
|
|
806 |
TUint n = (KChunkSize>>KPageShift)-pteIndex; // pages left in page table
|
|
|
807 |
if(n>KMaxPagesInOneGo)
|
|
|
808 |
n = KMaxPagesInOneGo;
|
|
|
809 |
|
|
|
810 |
// get some pages...
|
|
|
811 |
TPhysAddr* pages;
|
|
|
812 |
n = aPages.Pages(pages,n);
|
|
|
813 |
if(!n)
|
|
|
814 |
break;
|
|
|
815 |
|
|
|
816 |
MmuLock::Lock();
|
|
|
817 |
|
|
|
818 |
// check that mapping hasn't been reused for another purpose...
|
|
|
819 |
if(aMapInstanceCount!=MapInstanceCount())
|
|
|
820 |
{
|
|
|
821 |
MmuLock::Unlock();
|
|
|
822 |
break;
|
|
|
823 |
}
|
|
|
824 |
|
|
|
825 |
// get address of PTE for pages...
|
|
|
826 |
TPde* pPde = Mmu::PageDirectoryEntry(OsAsid(),addr);
|
|
|
827 |
TPte* pPte = Mmu::PageTableFromPde(*pPde);
|
|
|
828 |
if(pPte)
|
|
|
829 |
{
|
|
|
830 |
// unmap some pages...
|
|
|
831 |
pPte += pteIndex;
|
|
|
832 |
TBool keepPt = Mmu::UnmapPages(pPte,n,pages);
|
|
|
833 |
MmuLock::Unlock();
|
|
|
834 |
|
|
|
835 |
// free page table if no longer needed...
|
|
|
836 |
if(!keepPt)
|
|
|
837 |
FreePageTable(pPde);
|
|
|
838 |
}
|
|
|
839 |
else
|
|
|
840 |
{
|
|
|
841 |
// no page table found...
|
|
|
842 |
MmuLock::Unlock();
|
|
|
843 |
}
|
|
|
844 |
|
|
|
845 |
// move on...
|
|
|
846 |
aPages.Skip(n);
|
|
|
847 |
addr += n*KPageSize;
|
|
|
848 |
}
|
|
|
849 |
|
|
|
850 |
#ifndef COARSE_GRAINED_TLB_MAINTENANCE
|
|
|
851 |
// clean TLB...
|
|
|
852 |
TLinAddr endAddr = addr;
|
|
|
853 |
addr = startAddr+OsAsid();
|
|
|
854 |
do InvalidateTLBForPage(addr);
|
|
|
855 |
while((addr+=KPageSize)<endAddr);
|
|
|
856 |
#endif
|
|
|
857 |
}
|
|
|
858 |
|
|
|
859 |
|
|
|
860 |
void DFineMapping::RestrictPagesNA(RPageArray::TIter aPages, TUint aMapInstanceCount)
|
|
|
861 |
{
|
|
|
862 |
TRACE2(("DFineMapping[0x%08x]::RestrictPages(?,%d) index=0x%x count=0x%x",this,aMapInstanceCount,aPages.Index(),aPages.Count()));
|
|
|
863 |
|
|
|
864 |
__NK_ASSERT_DEBUG(aPages.Count());
|
|
|
865 |
|
|
|
866 |
TLinAddr addr = Base()+(aPages.Index()-iStartIndex)*KPageSize;
|
|
|
867 |
#ifndef COARSE_GRAINED_TLB_MAINTENANCE
|
|
|
868 |
TLinAddr startAddr = addr;
|
|
|
869 |
#endif
|
|
|
870 |
for(;;)
|
|
|
871 |
{
|
|
|
872 |
TUint pteIndex = (addr>>KPageShift)&(KChunkMask>>KPageShift);
|
|
|
873 |
|
|
|
874 |
// calculate max number of pages to do...
|
|
|
875 |
TUint n = (KChunkSize>>KPageShift)-pteIndex; // pages left in page table
|
|
|
876 |
if(n>KMaxPagesInOneGo)
|
|
|
877 |
n = KMaxPagesInOneGo;
|
|
|
878 |
|
|
|
879 |
// get some pages...
|
|
|
880 |
TPhysAddr* pages;
|
|
|
881 |
n = aPages.Pages(pages,n);
|
|
|
882 |
if(!n)
|
|
|
883 |
break;
|
|
|
884 |
|
|
|
885 |
MmuLock::Lock();
|
|
|
886 |
|
|
|
887 |
// check that mapping hasn't been reused for another purpose...
|
|
|
888 |
if(aMapInstanceCount!=MapInstanceCount())
|
|
|
889 |
{
|
|
|
890 |
MmuLock::Unlock();
|
|
|
891 |
break;
|
|
|
892 |
}
|
|
|
893 |
|
|
|
894 |
// get address of PTE for pages...
|
|
|
895 |
TPde* pPde = Mmu::PageDirectoryEntry(OsAsid(),addr);
|
|
|
896 |
TPte* pPte = Mmu::PageTableFromPde(*pPde);
|
|
|
897 |
if(pPte)
|
|
|
898 |
{
|
|
|
899 |
// restrict some pages...
|
|
|
900 |
pPte += pteIndex;
|
|
|
901 |
Mmu::RestrictPagesNA(pPte,n,pages);
|
|
|
902 |
}
|
|
|
903 |
MmuLock::Unlock();
|
|
|
904 |
|
|
|
905 |
// move on...
|
|
|
906 |
aPages.Skip(n);
|
|
|
907 |
addr += n*KPageSize;
|
|
|
908 |
}
|
|
|
909 |
|
|
|
910 |
#ifndef COARSE_GRAINED_TLB_MAINTENANCE
|
|
|
911 |
// clean TLB...
|
|
|
912 |
TLinAddr endAddr = addr;
|
|
|
913 |
addr = startAddr+OsAsid();
|
|
|
914 |
do InvalidateTLBForPage(addr);
|
|
|
915 |
while((addr+=KPageSize)<endAddr);
|
|
|
916 |
#endif
|
|
|
917 |
}
|
|
|
918 |
|
|
|
919 |
|
|
|
920 |
TInt DFineMapping::PageIn(RPageArray::TIter aPages, TPinArgs& aPinArgs, TUint aMapInstanceCount)
|
|
|
921 |
{
|
|
|
922 |
TRACE2(("DFineMapping[0x%08x]::PageIn(?,?,%d) index=0x%x count=0x%x",this,aMapInstanceCount,aPages.Index(),aPages.Count()));
|
|
|
923 |
|
|
|
924 |
__NK_ASSERT_DEBUG(aPages.Count());
|
|
|
925 |
__NK_ASSERT_DEBUG(aPages.Index()>=iStartIndex);
|
|
|
926 |
__NK_ASSERT_DEBUG(aPages.IndexEnd()-iStartIndex<=iSizeInPages);
|
|
|
927 |
|
|
|
928 |
TInt r = KErrNone;
|
|
|
929 |
|
|
|
930 |
TLinAddr addr = Base()+(aPages.Index()-iStartIndex)*KPageSize;
|
|
|
931 |
#ifndef COARSE_GRAINED_TLB_MAINTENANCE
|
|
|
932 |
TLinAddr startAddr = addr;
|
|
|
933 |
#endif
|
|
|
934 |
TBool pinPageTable = aPinArgs.iPinnedPageTables!=0; // check if we need to pin the first page table
|
|
|
935 |
for(;;)
|
|
|
936 |
{
|
|
|
937 |
TUint pteIndex = (addr>>KPageShift)&(KChunkMask>>KPageShift);
|
|
|
938 |
if(pteIndex==0)
|
|
|
939 |
pinPageTable = aPinArgs.iPinnedPageTables!=0; // started a new page table, check if we need to pin it
|
|
|
940 |
|
|
|
941 |
// calculate max number of pages to do...
|
|
|
942 |
TUint n = (KChunkSize>>KPageShift)-pteIndex; // pages left in page table
|
|
|
943 |
if(n>KMaxPagesInOneGo)
|
|
|
944 |
n = KMaxPagesInOneGo;
|
|
|
945 |
|
|
|
946 |
// get some pages...
|
|
|
947 |
TPhysAddr* pages;
|
|
|
948 |
n = aPages.Pages(pages,n);
|
|
|
949 |
if(!n)
|
|
|
950 |
break;
|
|
|
951 |
|
|
|
952 |
// make sure we have memory to pin the page table if required...
|
|
|
953 |
if(pinPageTable)
|
|
|
954 |
aPinArgs.AllocReplacementPages(KNumPagesToPinOnePageTable);
|
|
|
955 |
|
|
|
956 |
// get address of page table...
|
|
|
957 |
MmuLock::Lock();
|
|
|
958 |
TPte* pPte;
|
|
|
959 |
if(pinPageTable)
|
|
|
960 |
pPte = GetOrAllocatePageTable(addr,aPinArgs);
|
|
|
961 |
else
|
|
|
962 |
pPte = GetOrAllocatePageTable(addr);
|
|
|
963 |
|
|
|
964 |
// check mapping isn't being unmapped or hasn't been reused...
|
|
|
965 |
if(BeingDetached() || aMapInstanceCount != MapInstanceCount())
|
|
|
966 |
{
|
|
|
967 |
// can't map pages to this mapping any more, so free any page table
|
|
|
968 |
// we just got (if it's not used)...
|
|
|
969 |
if(!pPte)
|
|
|
970 |
MmuLock::Unlock();
|
|
|
971 |
else
|
|
|
972 |
{
|
|
|
973 |
SPageTableInfo* pti = SPageTableInfo::FromPtPtr(pPte);
|
|
|
974 |
TBool keepPt = pti->PermanenceCount() || pti->PageCount();
|
|
|
975 |
MmuLock::Unlock();
|
|
|
976 |
if(!keepPt)
|
|
|
977 |
FreePageTable(Mmu::PageDirectoryEntry(OsAsid(),addr));
|
|
|
978 |
}
|
|
|
979 |
// then end...
|
|
|
980 |
r = KErrNotFound;
|
|
|
981 |
break;
|
|
|
982 |
}
|
|
|
983 |
|
|
|
984 |
// check for OOM...
|
|
|
985 |
if(!pPte)
|
|
|
986 |
{
|
|
|
987 |
MmuLock::Unlock();
|
|
|
988 |
r = KErrNoMemory;
|
|
|
989 |
break;
|
|
|
990 |
}
|
|
|
991 |
|
|
|
992 |
// map some pages...
|
|
|
993 |
pPte += pteIndex;
|
|
|
994 |
TPte blankPte = iBlankPte;
|
|
|
995 |
if(aPinArgs.iReadOnly)
|
|
|
996 |
blankPte = Mmu::MakePteInaccessible(blankPte,true);
|
|
|
997 |
TBool keepPt = Mmu::PageInPages(pPte, n, pages, blankPte);
|
|
|
998 |
MmuLock::Unlock();
|
|
|
999 |
|
|
|
1000 |
// free page table if no longer needed...
|
|
|
1001 |
if(!keepPt)
|
|
|
1002 |
FreePageTable(Mmu::PageDirectoryEntry(OsAsid(),addr));
|
|
|
1003 |
|
|
|
1004 |
// move on...
|
|
|
1005 |
aPages.Skip(n);
|
|
|
1006 |
addr += n*KPageSize;
|
|
|
1007 |
pinPageTable = false;
|
|
|
1008 |
}
|
|
|
1009 |
|
|
|
1010 |
#ifndef COARSE_GRAINED_TLB_MAINTENANCE
|
|
|
1011 |
// clean TLB...
|
|
|
1012 |
TLinAddr endAddr = addr;
|
|
|
1013 |
addr = startAddr+OsAsid();
|
|
|
1014 |
do InvalidateTLBForPage(addr);
|
|
|
1015 |
while((addr+=KPageSize)<endAddr);
|
|
|
1016 |
#endif
|
|
|
1017 |
return r;
|
|
|
1018 |
}
|
|
|
1019 |
|
|
|
1020 |
|
|
|
1021 |
TBool DFineMapping::MovingPageIn(TPhysAddr& aPageArrayPtr, TUint aIndex)
|
|
|
1022 |
{
|
|
|
1023 |
__NK_ASSERT_DEBUG(MmuLock::IsHeld());
|
|
|
1024 |
__NK_ASSERT_DEBUG(IsAttached());
|
|
|
1025 |
__NK_ASSERT_DEBUG(!BeingDetached());
|
|
|
1026 |
|
|
|
1027 |
TLinAddr addr = Base() + (aIndex - iStartIndex) * KPageSize;
|
|
|
1028 |
TUint pteIndex = (addr >> KPageShift) & (KChunkMask >> KPageShift);
|
|
|
1029 |
|
|
|
1030 |
// get address of page table...
|
|
|
1031 |
TPte* pPte = GetPageTable(addr);
|
|
|
1032 |
|
|
|
1033 |
// Check the page is still mapped.
|
|
|
1034 |
if (!pPte)
|
|
|
1035 |
return EFalse;
|
|
|
1036 |
|
|
|
1037 |
// map some pages...
|
|
|
1038 |
pPte += pteIndex;
|
|
|
1039 |
Mmu::RemapPage(pPte, aPageArrayPtr, iBlankPte);
|
|
|
1040 |
InvalidateTLBForPage(addr);
|
|
|
1041 |
return ETrue;
|
|
|
1042 |
}
|
|
|
1043 |
|
|
|
1044 |
|
|
|
1045 |
TInt DFineMapping::DoMap()
|
|
|
1046 |
{
|
|
|
1047 |
TRACE(("DFineMapping[0x%08x]::DoMap()", this));
|
|
|
1048 |
DMemoryObject* memory = Memory(true); // safe because we're called from code which has added mapping to memory
|
|
|
1049 |
if(memory->IsDemandPaged())
|
|
|
1050 |
{
|
|
|
1051 |
// do nothing, allow pages to be mapped on demand...
|
|
|
1052 |
return KErrNone;
|
|
|
1053 |
}
|
|
|
1054 |
|
|
|
1055 |
RPageArray::TIter pageIter;
|
|
|
1056 |
memory->iPages.FindStart(iStartIndex,iSizeInPages,pageIter);
|
|
|
1057 |
|
|
|
1058 |
// map pages...
|
|
|
1059 |
TInt r = KErrNone;
|
|
|
1060 |
for(;;)
|
|
|
1061 |
{
|
|
|
1062 |
// find some pages...
|
|
|
1063 |
RPageArray::TIter pageList;
|
|
|
1064 |
TUint n = pageIter.Find(pageList);
|
|
|
1065 |
if(!n)
|
|
|
1066 |
break; // done
|
|
|
1067 |
|
|
|
1068 |
// map some pages...
|
|
|
1069 |
r = MapPages(pageList,MapInstanceCount());
|
|
|
1070 |
|
|
|
1071 |
// done with pages...
|
|
|
1072 |
pageIter.FindRelease(n);
|
|
|
1073 |
|
|
|
1074 |
if(r!=KErrNone)
|
|
|
1075 |
break;
|
|
|
1076 |
}
|
|
|
1077 |
|
|
|
1078 |
memory->iPages.FindEnd(iStartIndex,iSizeInPages);
|
|
|
1079 |
return r;
|
|
|
1080 |
}
|
|
|
1081 |
|
|
|
1082 |
|
|
|
1083 |
void DFineMapping::DoUnmap()
|
|
|
1084 |
{
|
|
|
1085 |
TRACE2(("DFineMapping[0x%08x]::DoUnmap()",this));
|
|
|
1086 |
|
|
|
1087 |
TLinAddr startAddr = Base();
|
|
|
1088 |
TUint count = iSizeInPages;
|
|
|
1089 |
TLinAddr addr = startAddr;
|
|
|
1090 |
TPde* pPde = Mmu::PageDirectoryEntry(OsAsid(),addr);
|
|
|
1091 |
|
|
|
1092 |
for(;;)
|
|
|
1093 |
{
|
|
|
1094 |
TUint pteIndex = (addr>>KPageShift)&(KChunkMask>>KPageShift);
|
|
|
1095 |
|
|
|
1096 |
// calculate number of pages to do...
|
|
|
1097 |
TUint n = (KChunkSize>>KPageShift)-pteIndex; // pages left in page table
|
|
|
1098 |
if(n>count)
|
|
|
1099 |
n = count;
|
|
|
1100 |
|
|
|
1101 |
// get page table...
|
|
|
1102 |
MmuLock::Lock();
|
|
|
1103 |
TPte* pPte = Mmu::PageTableFromPde(*pPde);
|
|
|
1104 |
if(!pPte)
|
|
|
1105 |
{
|
|
|
1106 |
// no page table found, so nothing to do...
|
|
|
1107 |
MmuLock::Unlock();
|
|
|
1108 |
}
|
|
|
1109 |
else
|
|
|
1110 |
{
|
|
|
1111 |
// unmap some pages...
|
|
|
1112 |
pPte += pteIndex;
|
|
|
1113 |
if(n>KMaxPagesInOneGo)
|
|
|
1114 |
n = KMaxPagesInOneGo;
|
|
|
1115 |
TBool keepPt = Mmu::UnmapPages(pPte, n);
|
|
|
1116 |
MmuLock::Unlock();
|
|
|
1117 |
|
|
|
1118 |
// free page table if no longer needed...
|
|
|
1119 |
if(!keepPt)
|
|
|
1120 |
FreePageTable(pPde);
|
|
|
1121 |
}
|
|
|
1122 |
|
|
|
1123 |
// move on...
|
|
|
1124 |
addr += n*KPageSize;
|
|
|
1125 |
count -= n;
|
|
|
1126 |
if(!count)
|
|
|
1127 |
break;
|
|
|
1128 |
if(!(addr&KChunkMask))
|
|
|
1129 |
++pPde;
|
|
|
1130 |
}
|
|
|
1131 |
|
|
|
1132 |
#ifdef COARSE_GRAINED_TLB_MAINTENANCE
|
|
|
1133 |
InvalidateTLBForAsid(OsAsid());
|
|
|
1134 |
#else
|
|
|
1135 |
// clean TLB...
|
|
|
1136 |
TLinAddr endAddr = addr;
|
|
|
1137 |
addr = LinAddrAndOsAsid();
|
|
|
1138 |
do InvalidateTLBForPage(addr);
|
|
|
1139 |
while((addr+=KPageSize)<endAddr);
|
|
|
1140 |
#endif
|
|
|
1141 |
}
|
|
|
1142 |
|
|
|
1143 |
|
|
|
1144 |
TInt DFineMapping::AllocatePermanentPageTables()
|
|
|
1145 |
{
|
|
|
1146 |
TRACE2(("DFineMapping[0x%08x]::AllocatePermanentPageTables()",this));
|
|
|
1147 |
__NK_ASSERT_DEBUG(((Flags()&EPageTablesAllocated)==0));
|
|
|
1148 |
__NK_ASSERT_DEBUG(iBlankPde);
|
|
|
1149 |
|
|
|
1150 |
TLinAddr addr = iAllocatedLinAddrAndOsAsid&~KPageMask;
|
|
|
1151 |
TInt osAsid = iAllocatedLinAddrAndOsAsid&KPageMask;
|
|
|
1152 |
TPde* pStartPde = Mmu::PageDirectoryEntry(osAsid,addr);
|
|
|
1153 |
TPde* pEndPde = Mmu::PageDirectoryEntry(osAsid,addr+iAllocatedSize-1);
|
|
|
1154 |
TPde* pPde = pStartPde;
|
|
|
1155 |
|
|
|
1156 |
while(pPde<=pEndPde)
|
|
|
1157 |
{
|
|
|
1158 |
MmuLock::Lock();
|
|
|
1159 |
TPte* pPte = AllocatePageTable(addr,pPde,true);
|
|
|
1160 |
if(!pPte)
|
|
|
1161 |
{
|
|
|
1162 |
// out of memory...
|
|
|
1163 |
MmuLock::Unlock();
|
|
|
1164 |
FreePermanentPageTables(pStartPde,pPde-1);
|
|
|
1165 |
return KErrNoMemory;
|
|
|
1166 |
}
|
|
|
1167 |
MmuLock::Unlock();
|
|
|
1168 |
|
|
|
1169 |
addr += KChunkSize;
|
|
|
1170 |
++pPde;
|
|
|
1171 |
}
|
|
|
1172 |
|
|
|
1173 |
TRACE2(("DFineMapping[0x%08x]::AllocatePermanentPageTables() done",this));
|
|
|
1174 |
Flags() |= DMemoryMapping::EPageTablesAllocated;
|
|
|
1175 |
return KErrNone;
|
|
|
1176 |
}
|
|
|
1177 |
|
|
|
1178 |
|
|
|
1179 |
void DFineMapping::FreePermanentPageTables(TPde* aFirstPde, TPde* aLastPde)
|
|
|
1180 |
{
|
|
|
1181 |
Flags() &= ~DMemoryMapping::EPageTablesAllocated;
|
|
|
1182 |
|
|
|
1183 |
MmuLock::Lock();
|
|
|
1184 |
|
|
|
1185 |
TUint flash = 0;
|
|
|
1186 |
TPde* pPde = aFirstPde;
|
|
|
1187 |
while(pPde<=aLastPde)
|
|
|
1188 |
{
|
|
|
1189 |
TPte* pPte = Mmu::PageTableFromPde(*pPde);
|
|
|
1190 |
__NK_ASSERT_DEBUG(pPte);
|
|
|
1191 |
SPageTableInfo* pti = SPageTableInfo::FromPtPtr(pPte);
|
|
|
1192 |
if(pti->DecPermanenceCount() || pti->PageCount())
|
|
|
1193 |
{
|
|
|
1194 |
// still in use...
|
|
|
1195 |
MmuLock::Flash(flash,KMaxPageInfoUpdatesInOneGo*2);
|
|
|
1196 |
}
|
|
|
1197 |
else
|
|
|
1198 |
{
|
|
|
1199 |
// page table no longer used for anything...
|
|
|
1200 |
MmuLock::Unlock();
|
|
|
1201 |
FreePageTable(pPde);
|
|
|
1202 |
MmuLock::Lock();
|
|
|
1203 |
}
|
|
|
1204 |
|
|
|
1205 |
++pPde;
|
|
|
1206 |
}
|
|
|
1207 |
|
|
|
1208 |
MmuLock::Unlock();
|
|
|
1209 |
}
|
|
|
1210 |
|
|
|
1211 |
|
|
|
1212 |
void DFineMapping::FreePermanentPageTables()
|
|
|
1213 |
{
|
|
|
1214 |
if((Flags()&EPageTablesAllocated)==0)
|
|
|
1215 |
return;
|
|
|
1216 |
|
|
|
1217 |
TRACE2(("DFineMapping[0x%08x]::FreePermanentPageTables()",this));
|
|
|
1218 |
|
|
|
1219 |
TLinAddr addr = iAllocatedLinAddrAndOsAsid&~KPageMask;
|
|
|
1220 |
TInt osAsid = iAllocatedLinAddrAndOsAsid&KPageMask;
|
|
|
1221 |
TPde* pPde = Mmu::PageDirectoryEntry(osAsid,addr);
|
|
|
1222 |
TPde* pEndPde = Mmu::PageDirectoryEntry(osAsid,addr+iAllocatedSize-1);
|
|
|
1223 |
FreePermanentPageTables(pPde,pEndPde);
|
|
|
1224 |
}
|
|
|
1225 |
|
|
|
1226 |
|
|
|
1227 |
TPte* DFineMapping::FindPageTable(TLinAddr aLinAddr, TUint aMemoryIndex)
|
|
|
1228 |
{
|
|
|
1229 |
TRACE(("DFineMapping::FindPageTable(0x%x, %d)", aLinAddr, aMemoryIndex));
|
|
|
1230 |
__NK_ASSERT_DEBUG(MmuLock::IsHeld());
|
|
|
1231 |
__NK_ASSERT_DEBUG(IsAttached());
|
|
|
1232 |
return GetPageTable(aLinAddr);
|
|
|
1233 |
}
|
|
|
1234 |
|
|
|
1235 |
|
|
|
1236 |
|
|
|
1237 |
//
|
|
|
1238 |
// DPhysicalPinMapping
|
|
|
1239 |
//
|
|
|
1240 |
|
|
|
1241 |
DPhysicalPinMapping::DPhysicalPinMapping()
|
|
|
1242 |
: DMemoryMappingBase(EPinned|EPhysicalPinningMapping)
|
|
|
1243 |
{
|
|
|
1244 |
}
|
|
|
1245 |
|
|
|
1246 |
|
|
|
1247 |
TInt DPhysicalPinMapping::PhysAddr(TUint aIndex, TUint aCount, TPhysAddr& aPhysicalAddress, TPhysAddr* aPhysicalPageList)
|
|
|
1248 |
{
|
|
|
1249 |
__NK_ASSERT_ALWAYS(IsAttached());
|
|
|
1250 |
|
|
|
1251 |
__NK_ASSERT_ALWAYS(TUint(aIndex+aCount)>aIndex && TUint(aIndex+aCount)<=iSizeInPages);
|
|
|
1252 |
aIndex += iStartIndex;
|
|
|
1253 |
|
|
|
1254 |
DCoarseMemory* memory = (DCoarseMemory*)Memory(true); // safe because we should only be called whilst memory is Pinned
|
|
|
1255 |
TInt r = memory->PhysAddr(aIndex,aCount,aPhysicalAddress,aPhysicalPageList);
|
|
|
1256 |
if(r!=KErrNone)
|
|
|
1257 |
return r;
|
|
|
1258 |
|
|
|
1259 |
if(memory->IsDemandPaged() && !IsReadOnly())
|
|
|
1260 |
{
|
|
|
1261 |
// the memory is demand paged and writeable so we need to mark it as dirty
|
|
|
1262 |
// as we have to assume that the memory will be modified via the physical
|
|
|
1263 |
// addresses we return...
|
|
|
1264 |
MmuLock::Lock();
|
|
|
1265 |
TPhysAddr* pages = aPhysicalPageList;
|
|
|
1266 |
TUint count = aCount;
|
|
|
1267 |
while(count)
|
|
|
1268 |
{
|
|
|
1269 |
SPageInfo* pi = SPageInfo::FromPhysAddr(*(pages++));
|
|
|
1270 |
pi->SetDirty();
|
|
|
1271 |
if((count&(KMaxPageInfoUpdatesInOneGo-1))==0)
|
|
|
1272 |
MmuLock::Flash(); // flash lock every KMaxPageInfoUpdatesInOneGo iterations of the loop
|
|
|
1273 |
--count;
|
|
|
1274 |
}
|
|
|
1275 |
MmuLock::Unlock();
|
|
|
1276 |
}
|
|
|
1277 |
|
|
|
1278 |
return KErrNone;
|
|
|
1279 |
}
|
|
|
1280 |
|
|
|
1281 |
|
|
|
1282 |
TInt DPhysicalPinMapping::Pin(DMemoryObject* aMemory, TUint aIndex, TUint aCount, TMappingPermissions aPermissions)
|
|
|
1283 |
{
|
|
|
1284 |
PteType() = Mmu::PteType(aPermissions,true);
|
|
|
1285 |
return Attach(aMemory,aIndex,aCount);
|
|
|
1286 |
}
|
|
|
1287 |
|
|
|
1288 |
|
|
|
1289 |
void DPhysicalPinMapping::Unpin()
|
|
|
1290 |
{
|
|
|
1291 |
Detach();
|
|
|
1292 |
}
|
|
|
1293 |
|
|
|
1294 |
|
|
|
1295 |
TInt DPhysicalPinMapping::MapPages(RPageArray::TIter /*aPages*/, TUint /*aMapInstanceCount*/)
|
|
|
1296 |
{
|
|
|
1297 |
// shouldn't ever be called because these mappings are always pinned...
|
|
|
1298 |
__NK_ASSERT_DEBUG(0);
|
|
|
1299 |
return KErrNotSupported;
|
|
|
1300 |
}
|
|
|
1301 |
|
|
|
1302 |
|
|
|
1303 |
void DPhysicalPinMapping::UnmapPages(RPageArray::TIter /*aPages*/, TUint /*aMapInstanceCount*/)
|
|
|
1304 |
{
|
|
|
1305 |
// nothing to do...
|
|
|
1306 |
}
|
|
|
1307 |
|
|
|
1308 |
|
|
|
1309 |
void DPhysicalPinMapping::RemapPage(TPhysAddr& /*aPageArrayPtr*/, TUint /*aIndex*/, TUint /*aMapInstanceCount*/, TBool /*aInvalidateTLB*/)
|
|
|
1310 |
{
|
|
|
1311 |
// shouldn't ever be called because physically pinned mappings block page moving.
|
|
|
1312 |
__NK_ASSERT_DEBUG(0);
|
|
|
1313 |
}
|
|
|
1314 |
|
|
|
1315 |
|
|
|
1316 |
void DPhysicalPinMapping::RestrictPagesNA(RPageArray::TIter /*aPages*/, TUint /*aMapInstanceCount*/)
|
|
|
1317 |
{
|
|
|
1318 |
// nothing to do...
|
|
|
1319 |
}
|
|
|
1320 |
|
|
|
1321 |
|
|
|
1322 |
TInt DPhysicalPinMapping::PageIn(RPageArray::TIter /*aPages*/, TPinArgs& /*aPinArgs*/, TUint /*aMapInstanceCount*/)
|
|
|
1323 |
{
|
|
|
1324 |
// nothing to do...
|
|
|
1325 |
return KErrNone;
|
|
|
1326 |
}
|
|
|
1327 |
|
|
|
1328 |
|
|
|
1329 |
TInt DPhysicalPinMapping::MovingPageIn(TPhysAddr& /*aPageArrayPtr*/, TUint /*aIndex*/)
|
|
|
1330 |
{
|
|
|
1331 |
// Should never be asked to page in a page that is being moved as physical
|
|
|
1332 |
// pin mappings don't own any page tables.
|
|
|
1333 |
__NK_ASSERT_DEBUG(0);
|
|
|
1334 |
return KErrAbort;
|
|
|
1335 |
}
|
|
|
1336 |
|
|
|
1337 |
TInt DPhysicalPinMapping::DoMap()
|
|
|
1338 |
{
|
|
|
1339 |
// nothing to do...
|
|
|
1340 |
return KErrNone;
|
|
|
1341 |
}
|
|
|
1342 |
|
|
|
1343 |
|
|
|
1344 |
void DPhysicalPinMapping::DoUnmap()
|
|
|
1345 |
{
|
|
|
1346 |
// nothing to do...
|
|
|
1347 |
}
|
|
|
1348 |
|
|
|
1349 |
|
|
|
1350 |
|
|
|
1351 |
//
|
|
|
1352 |
// DVirtualPinMapping
|
|
|
1353 |
//
|
|
|
1354 |
|
|
|
1355 |
DVirtualPinMapping::DVirtualPinMapping()
|
|
|
1356 |
: iMaxCount(0)
|
|
|
1357 |
{
|
|
|
1358 |
// Clear flag so it is possible to distingish between virtual and physical pin mappings.
|
|
|
1359 |
Flags() &= ~EPhysicalPinningMapping;
|
|
|
1360 |
}
|
|
|
1361 |
|
|
|
1362 |
|
|
|
1363 |
DVirtualPinMapping::~DVirtualPinMapping()
|
|
|
1364 |
{
|
|
|
1365 |
TRACE(("DVirtualPinMapping[0x%08x]::~DVirtualPinMapping()",this));
|
|
|
1366 |
FreePageTableArray();
|
|
|
1367 |
}
|
|
|
1368 |
|
|
|
1369 |
|
|
|
1370 |
DVirtualPinMapping* DVirtualPinMapping::New(TUint aMaxCount)
|
|
|
1371 |
{
|
|
|
1372 |
TRACE(("DVirtualPinMapping::New(0x%x)",aMaxCount));
|
|
|
1373 |
DVirtualPinMapping* self = new DVirtualPinMapping;
|
|
|
1374 |
if(aMaxCount)
|
|
|
1375 |
{
|
|
|
1376 |
// pages have been reserved for our use.
|
|
|
1377 |
|
|
|
1378 |
// Create the array for storing pinned paged tables now, so we
|
|
|
1379 |
// don't risk out-of-memory errors trying to do so later...
|
|
|
1380 |
if(self->AllocPageTableArray(aMaxCount)!=KErrNone)
|
|
|
1381 |
{
|
|
|
1382 |
// failed, so cleanup...
|
|
|
1383 |
self->Close();
|
|
|
1384 |
self = 0;
|
|
|
1385 |
}
|
|
|
1386 |
else
|
|
|
1387 |
{
|
|
|
1388 |
// success, so remember the pages that have been reserved for us...
|
|
|
1389 |
self->iMaxCount = aMaxCount;
|
|
|
1390 |
self->Flags() |= EPinningPagesReserved;
|
|
|
1391 |
}
|
|
|
1392 |
}
|
|
|
1393 |
TRACE(("DVirtualPinMapping::New(0x%x) returns 0x%08x",aMaxCount,self));
|
|
|
1394 |
return self;
|
|
|
1395 |
}
|
|
|
1396 |
|
|
|
1397 |
|
|
|
1398 |
TUint DVirtualPinMapping::MaxPageTables(TUint aPageCount)
|
|
|
1399 |
{
|
|
|
1400 |
return (aPageCount+2*KChunkSize/KPageSize-2)>>(KChunkShift-KPageShift);
|
|
|
1401 |
}
|
|
|
1402 |
|
|
|
1403 |
|
|
|
1404 |
TInt DVirtualPinMapping::AllocPageTableArray(TUint aCount)
|
|
|
1405 |
{
|
|
|
1406 |
__NK_ASSERT_ALWAYS(iAllocatedPinnedPageTables==0);
|
|
|
1407 |
TUint maxPt = MaxPageTables(aCount);
|
|
|
1408 |
if(maxPt>KSmallPinnedPageTableCount)
|
|
|
1409 |
{
|
|
|
1410 |
iAllocatedPinnedPageTables = new TPte*[maxPt];
|
|
|
1411 |
if(!iAllocatedPinnedPageTables)
|
|
|
1412 |
return KErrNoMemory;
|
|
|
1413 |
}
|
|
|
1414 |
return KErrNone;
|
|
|
1415 |
}
|
|
|
1416 |
|
|
|
1417 |
|
|
|
1418 |
void DVirtualPinMapping::FreePageTableArray()
|
|
|
1419 |
{
|
|
|
1420 |
delete [] iAllocatedPinnedPageTables;
|
|
|
1421 |
iAllocatedPinnedPageTables = 0;
|
|
|
1422 |
}
|
|
|
1423 |
|
|
|
1424 |
|
|
|
1425 |
TPte** DVirtualPinMapping::PageTableArray()
|
|
|
1426 |
{
|
|
|
1427 |
return iAllocatedPinnedPageTables ? iAllocatedPinnedPageTables : iSmallPinnedPageTablesArray;
|
|
|
1428 |
}
|
|
|
1429 |
|
|
|
1430 |
|
|
|
1431 |
TInt DVirtualPinMapping::Pin( DMemoryObject* aMemory, TUint aIndex, TUint aCount, TMappingPermissions aPermissions,
|
|
|
1432 |
DMemoryMappingBase* aMapping, TUint aMappingInstanceCount)
|
|
|
1433 |
{
|
|
|
1434 |
// Virtual pinning ensures a page is always mapped to a particular virtual address
|
|
|
1435 |
// and therefore require a non-pinning mapping of the virtual address to pin.
|
|
|
1436 |
__NK_ASSERT_ALWAYS(aMapping && !aMapping->IsPinned());
|
|
|
1437 |
|
|
|
1438 |
if(iMaxCount)
|
|
|
1439 |
{
|
|
|
1440 |
if(aCount>iMaxCount)
|
|
|
1441 |
return KErrArgument;
|
|
|
1442 |
}
|
|
|
1443 |
else
|
|
|
1444 |
{
|
|
|
1445 |
TInt r = AllocPageTableArray(aCount);
|
|
|
1446 |
if(r!=KErrNone)
|
|
|
1447 |
return r;
|
|
|
1448 |
}
|
|
|
1449 |
|
|
|
1450 |
iPinVirtualMapping = aMapping;
|
|
|
1451 |
iPinVirtualMapInstanceCount = aMappingInstanceCount;
|
|
|
1452 |
TInt r = DPhysicalPinMapping::Pin(aMemory,aIndex,aCount,aPermissions);
|
|
|
1453 |
iPinVirtualMapping = 0;
|
|
|
1454 |
|
|
|
1455 |
return r;
|
|
|
1456 |
}
|
|
|
1457 |
|
|
|
1458 |
|
|
|
1459 |
void DVirtualPinMapping::Unpin()
|
|
|
1460 |
{
|
|
|
1461 |
Detach();
|
|
|
1462 |
}
|
|
|
1463 |
|
|
|
1464 |
|
|
|
1465 |
void DVirtualPinMapping::UnpinPageTables(TPinArgs& aPinArgs)
|
|
|
1466 |
{
|
|
|
1467 |
TPte** pPt = PageTableArray();
|
|
|
1468 |
TPte** pPtEnd = pPt+iNumPinnedPageTables;
|
|
|
1469 |
|
|
|
1470 |
MmuLock::Lock();
|
|
|
1471 |
while(pPt<pPtEnd)
|
|
|
1472 |
PageTableAllocator::UnpinPageTable(*pPt++,aPinArgs);
|
|
|
1473 |
MmuLock::Unlock();
|
|
|
1474 |
iNumPinnedPageTables = 0;
|
|
|
1475 |
|
|
|
1476 |
if(!iMaxCount)
|
|
|
1477 |
FreePageTableArray();
|
|
|
1478 |
}
|
|
|
1479 |
|
|
|
1480 |
|
|
|
1481 |
void DVirtualPinMapping::RemapPage(TPhysAddr& /*aPageArrayPtr*/, TUint /*aIndex*/, TUint /*aMapInstanceCount*/, TBool /*aInvalidateTLB*/)
|
|
|
1482 |
{
|
|
|
1483 |
__NK_ASSERT_DEBUG(0);
|
|
|
1484 |
}
|
|
|
1485 |
|
|
|
1486 |
|
|
|
1487 |
TInt DVirtualPinMapping::PageIn(RPageArray::TIter aPages, TPinArgs& aPinArgs, TUint aMapInstanceCount)
|
|
|
1488 |
{
|
|
|
1489 |
if(iPinVirtualMapping)
|
|
|
1490 |
return iPinVirtualMapping->PageIn(aPages, aPinArgs, iPinVirtualMapInstanceCount);
|
|
|
1491 |
return KErrNone;
|
|
|
1492 |
}
|
|
|
1493 |
|
|
|
1494 |
|
|
|
1495 |
TInt DVirtualPinMapping::MovingPageIn(TPhysAddr& /*aPageArrayPtr*/, TUint /*aIndex*/)
|
|
|
1496 |
{
|
|
|
1497 |
// Should never be asked to page in a page that is being moved as virtual
|
|
|
1498 |
// pin mappings don't own any page tables.
|
|
|
1499 |
__NK_ASSERT_DEBUG(0);
|
|
|
1500 |
return KErrAbort;
|
|
|
1501 |
}
|
|
|
1502 |
|
|
|
1503 |
|
|
|
1504 |
TInt DVirtualPinMapping::DoPin(TPinArgs& aPinArgs)
|
|
|
1505 |
{
|
|
|
1506 |
// setup for page table pinning...
|
|
|
1507 |
aPinArgs.iPinnedPageTables = PageTableArray();
|
|
|
1508 |
|
|
|
1509 |
// do pinning...
|
|
|
1510 |
TInt r = DPhysicalPinMapping::DoPin(aPinArgs);
|
|
|
1511 |
|
|
|
1512 |
// save results...
|
|
|
1513 |
iNumPinnedPageTables = aPinArgs.iNumPinnedPageTables;
|
|
|
1514 |
__NK_ASSERT_DEBUG(iNumPinnedPageTables<=MaxPageTables(iSizeInPages));
|
|
|
1515 |
|
|
|
1516 |
// cleanup if error...
|
|
|
1517 |
if(r!=KErrNone)
|
|
|
1518 |
UnpinPageTables(aPinArgs);
|
|
|
1519 |
|
|
|
1520 |
return r;
|
|
|
1521 |
}
|
|
|
1522 |
|
|
|
1523 |
|
|
|
1524 |
void DVirtualPinMapping::DoUnpin(TPinArgs& aPinArgs)
|
|
|
1525 |
{
|
|
|
1526 |
DPhysicalPinMapping::DoUnpin(aPinArgs);
|
|
|
1527 |
UnpinPageTables(aPinArgs);
|
|
|
1528 |
}
|
|
|
1529 |
|
|
|
1530 |
|
|
|
1531 |
|
|
|
1532 |
//
|
|
|
1533 |
// DMemoryMappingBase
|
|
|
1534 |
//
|
|
|
1535 |
|
|
|
1536 |
|
|
|
1537 |
DMemoryMappingBase::DMemoryMappingBase(TUint aType)
|
|
|
1538 |
{
|
|
|
1539 |
Flags() = aType; // rest of members cleared by DBase
|
|
|
1540 |
}
|
|
|
1541 |
|
|
|
1542 |
|
|
|
1543 |
TInt DMemoryMappingBase::Attach(DMemoryObject* aMemory, TUint aIndex, TUint aCount)
|
|
|
1544 |
{
|
|
|
1545 |
TRACE(("DMemoryMappingBase[0x%08x]::Attach(0x%08x,0x%x,0x%x)",this,aMemory,aIndex,aCount));
|
|
|
1546 |
__NK_ASSERT_DEBUG(!IsAttached());
|
|
|
1547 |
TInt r;
|
|
|
1548 |
|
|
|
1549 |
if(++iMapInstanceCount>1)
|
|
|
1550 |
{// This mapping is being reused...
|
|
|
1551 |
|
|
|
1552 |
// Non-pinned mappings can be reused however this is only exercised
|
|
|
1553 |
// by aligned shared buffers whose memory is managed by the unpaged
|
|
|
1554 |
// or hardware memory manager. Reusing mappings to paged or movable
|
|
|
1555 |
// memory hasn't tested and may need reusing mappings and its
|
|
|
1556 |
// interactions with the fault handler, pinning etc to be tested.
|
|
|
1557 |
__NK_ASSERT_DEBUG( IsPinned() ||
|
|
|
1558 |
aMemory->iManager == TheUnpagedMemoryManager ||
|
|
|
1559 |
aMemory->iManager == TheHardwareMemoryManager);
|
|
|
1560 |
|
|
|
1561 |
// make sure new instance count is seen by other threads which may be operating
|
|
|
1562 |
// on old mapping instance (this will stop them changing the mapping any more)...
|
|
|
1563 |
MmuLock::Lock();
|
|
|
1564 |
MmuLock::Unlock();
|
|
|
1565 |
// clear unmapping flag from previous use...
|
|
|
1566 |
__e32_atomic_and_ord16(&Flags(), (TUint16)~(EDetaching|EPageUnmapVetoed));
|
|
|
1567 |
}
|
|
|
1568 |
|
|
|
1569 |
__NK_ASSERT_DEBUG((Flags()&(EDetaching|EPageUnmapVetoed))==0);
|
|
|
1570 |
|
|
|
1571 |
// set region being mapped...
|
|
|
1572 |
iStartIndex = aIndex;
|
|
|
1573 |
iSizeInPages = aCount;
|
|
|
1574 |
|
|
|
1575 |
// reserve any pages required for pinning demand paged memory.
|
|
|
1576 |
// We must do this before we add the mapping to the memory object
|
|
|
1577 |
// because once that is done the pages we are mapping will be prevented
|
|
|
1578 |
// from being paged out. That could leave the paging system without
|
|
|
1579 |
// enough pages to correctly handle page faults...
|
|
|
1580 |
TPinArgs pinArgs;
|
|
|
1581 |
pinArgs.iReadOnly = IsReadOnly();
|
|
|
1582 |
if(IsPinned() && aMemory->IsDemandPaged())
|
|
|
1583 |
{
|
|
|
1584 |
pinArgs.iUseReserve = Flags()&EPinningPagesReserved;
|
|
|
1585 |
r = pinArgs.AllocReplacementPages(aCount);
|
|
|
1586 |
if(r!=KErrNone)
|
|
|
1587 |
return r;
|
|
|
1588 |
}
|
|
|
1589 |
|
|
|
1590 |
// link into memory object...
|
|
|
1591 |
r = aMemory->AddMapping(this);
|
|
|
1592 |
if(r==KErrNone)
|
|
|
1593 |
{
|
|
|
1594 |
// pin pages if needed...
|
|
|
1595 |
if(IsPinned())
|
|
|
1596 |
r = DoPin(pinArgs);
|
|
|
1597 |
|
|
|
1598 |
// add pages to this mapping...
|
|
|
1599 |
if(r==KErrNone)
|
|
|
1600 |
r = DoMap();
|
|
|
1601 |
|
|
|
1602 |
// revert if error...
|
|
|
1603 |
if(r!=KErrNone)
|
|
|
1604 |
Detach();
|
|
|
1605 |
}
|
|
|
1606 |
|
|
|
1607 |
// free any left over pinning pages...
|
|
|
1608 |
pinArgs.FreeReplacementPages();
|
|
|
1609 |
|
|
|
1610 |
return r;
|
|
|
1611 |
}
|
|
|
1612 |
|
|
|
1613 |
|
|
|
1614 |
void DMemoryMappingBase::Detach()
|
|
|
1615 |
{
|
|
|
1616 |
TRACE(("DMemoryMappingBase[0x%08x]::Detach()",this));
|
|
|
1617 |
__NK_ASSERT_DEBUG(IsAttached());
|
|
|
1618 |
|
|
|
1619 |
// set EDetaching flag, which prevents anyone modifying pages in this
|
|
|
1620 |
// mapping, except to remove them...
|
|
|
1621 |
MmuLock::Lock();
|
|
|
1622 |
__e32_atomic_ior_ord16(&Flags(), (TUint16)EDetaching);
|
|
|
1623 |
MmuLock::Unlock();
|
|
|
1624 |
|
|
|
1625 |
// remove all pages from this mapping...
|
|
|
1626 |
DoUnmap();
|
|
|
1627 |
|
|
|
1628 |
// unpin pages if needed...
|
|
|
1629 |
TPinArgs pinArgs;
|
|
|
1630 |
if(IsPinned())
|
|
|
1631 |
DoUnpin(pinArgs);
|
|
|
1632 |
|
|
|
1633 |
// unlink from memory object...
|
|
|
1634 |
iMemory->RemoveMapping(this);
|
|
|
1635 |
|
|
|
1636 |
// free any spare pages produced by unpinning...
|
|
|
1637 |
pinArgs.FreeReplacementPages();
|
|
|
1638 |
}
|
|
|
1639 |
|
|
|
1640 |
|
|
|
1641 |
TInt DMemoryMappingBase::DoPin(TPinArgs& aPinArgs)
|
|
|
1642 |
{
|
|
|
1643 |
DMemoryObject* memory = Memory(true); // safe because we're called from code which has added mapping to memory
|
|
|
1644 |
return memory->iManager->Pin(memory,this,aPinArgs);
|
|
|
1645 |
}
|
|
|
1646 |
|
|
|
1647 |
|
|
|
1648 |
void DMemoryMappingBase::DoUnpin(TPinArgs& aPinArgs)
|
|
|
1649 |
{
|
|
|
1650 |
DMemoryObject* memory = Memory(true); // safe because we're called from code which will be removing this mapping from memory afterwards
|
|
|
1651 |
memory->iManager->Unpin(memory,this,aPinArgs);
|
|
|
1652 |
}
|
|
|
1653 |
|
|
|
1654 |
|
|
|
1655 |
void DMemoryMappingBase::LinkToMemory(DMemoryObject* aMemory, TMappingList& aMappingList)
|
|
|
1656 |
{
|
|
|
1657 |
TRACE(("DMemoryMappingBase[0x%08x]::LinkToMemory(0x%08x,?)",this,aMemory));
|
|
|
1658 |
__NK_ASSERT_DEBUG(MmuLock::IsHeld());
|
|
|
1659 |
__NK_ASSERT_DEBUG(aMappingList.LockIsHeld());
|
|
|
1660 |
__NK_ASSERT_ALWAYS(!IsAttached());
|
|
|
1661 |
__NK_ASSERT_DEBUG(!BeingDetached());
|
|
|
1662 |
aMappingList.Add(this);
|
|
|
1663 |
iMemory = aMemory;
|
|
|
1664 |
iMemory->SetMappingAddedFlag();
|
|
|
1665 |
}
|
|
|
1666 |
|
|
|
1667 |
|
|
|
1668 |
void DMemoryMappingBase::UnlinkFromMemory(TMappingList& aMappingList)
|
|
|
1669 |
{
|
|
|
1670 |
TRACE(("DMemoryMappingBase[0x%08x]::UnlinkMapping(?)",this));
|
|
|
1671 |
|
|
|
1672 |
// unlink...
|
|
|
1673 |
MmuLock::Lock();
|
|
|
1674 |
aMappingList.Lock();
|
|
|
1675 |
__NK_ASSERT_DEBUG(IsAttached());
|
|
|
1676 |
__NK_ASSERT_DEBUG(BeingDetached());
|
|
|
1677 |
aMappingList.Remove(this);
|
|
|
1678 |
DMemoryObject* memory = iMemory;
|
|
|
1679 |
iMemory = 0;
|
|
|
1680 |
aMappingList.Unlock();
|
|
|
1681 |
MmuLock::Unlock();
|
|
|
1682 |
|
|
|
1683 |
// if mapping had vetoed any page decommits...
|
|
|
1684 |
if(Flags()&DMemoryMapping::EPageUnmapVetoed)
|
|
|
1685 |
{
|
|
|
1686 |
// then queue cleanup of decommitted pages...
|
|
|
1687 |
memory->iManager->QueueCleanup(memory,DMemoryManager::ECleanupDecommitted);
|
|
|
1688 |
}
|
|
|
1689 |
}
|
|
|
1690 |
|
|
|
1691 |
|
|
|
1692 |
|
|
|
1693 |
//
|
|
|
1694 |
// Debug
|
|
|
1695 |
//
|
|
|
1696 |
|
|
|
1697 |
void DMemoryMappingBase::Dump()
|
|
|
1698 |
{
|
|
|
1699 |
#ifdef _DEBUG
|
|
|
1700 |
Kern::Printf("DMemoryMappingBase[0x%08x]::Dump()",this);
|
|
|
1701 |
Kern::Printf(" IsAttached() = %d",(bool)IsAttached());
|
|
|
1702 |
Kern::Printf(" iMemory = 0x%08x",iMemory);
|
|
|
1703 |
Kern::Printf(" iStartIndex = 0x%x",iStartIndex);
|
|
|
1704 |
Kern::Printf(" iSizeInPages = 0x%x",iSizeInPages);
|
|
|
1705 |
Kern::Printf(" Flags() = 0x%x",Flags());
|
|
|
1706 |
Kern::Printf(" PteType() = 0x%x",PteType());
|
|
|
1707 |
#endif // _DEBUG
|
|
|
1708 |
}
|
|
|
1709 |
|
|
|
1710 |
|
|
|
1711 |
void DMemoryMapping::Dump()
|
|
|
1712 |
{
|
|
|
1713 |
#ifdef _DEBUG
|
|
|
1714 |
Kern::Printf("DMemoryMapping[0x%08x]::Dump()",this);
|
|
|
1715 |
Kern::Printf(" Base() = 0x08%x",iLinAddrAndOsAsid&~KPageMask);
|
|
|
1716 |
Kern::Printf(" OsAsid() = %d",iLinAddrAndOsAsid&KPageMask);
|
|
|
1717 |
Kern::Printf(" iBlankPde = 0x%08x",iBlankPde);
|
|
|
1718 |
Kern::Printf(" iBlankPte = 0x%08x",iBlankPte);
|
|
|
1719 |
Kern::Printf(" iAllocatedLinAddrAndOsAsid = 0x%08x",iAllocatedLinAddrAndOsAsid);
|
|
|
1720 |
Kern::Printf(" iAllocatedSize = 0x%x",iAllocatedSize);
|
|
|
1721 |
DMemoryMappingBase::Dump();
|
|
|
1722 |
#endif // _DEBUG
|
|
|
1723 |
}
|
|
|
1724 |
|
|
|
1725 |
|
|
|
1726 |
void DVirtualPinMapping::Dump()
|
|
|
1727 |
{
|
|
|
1728 |
#ifdef _DEBUG
|
|
|
1729 |
Kern::Printf("DVirtualPinMapping[0x%08x]::Dump()",this);
|
|
|
1730 |
Kern::Printf(" iMaxCount = %d",iMaxCount);
|
|
|
1731 |
Kern::Printf(" iNumPinnedPageTables = %d",iNumPinnedPageTables);
|
|
|
1732 |
DMemoryMappingBase::Dump();
|
|
|
1733 |
#endif // _DEBUG
|
|
|
1734 |
}
|
|
|
1735 |
|