author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 07 Jan 2010 13:38:45 +0200 | |
changeset 10 | 36bfc973b146 |
parent 9 | 96e5fb8b040d |
child 22 | 2f92ad2dc5db |
permissions | -rw-r--r-- |
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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 "memmodel.h" |
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#include "mm.h" |
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#include "mmu.h" |
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#include "mpdalloc.h" |
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#include "mobject.h" |
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#include "cache_maintenance.inl" |
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// check enough space for page directories... |
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__ASSERT_COMPILE(KNumOsAsids <= (KPageDirectoryEnd-KPageDirectoryBase)/KPageDirectorySize); |
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PageDirectoryAllocator PageDirectories; |
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const TUint KLocalPdShift = KPageDirectoryShift > KPageShift ? KPageDirectoryShift-1 : KPageShift; |
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const TUint KLocalPdSize = 1<<KLocalPdShift; |
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const TUint KLocalPdPages = 1<<(KLocalPdShift-KPageShift); |
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__ASSERT_COMPILE((KPageDirectoryBase&(31*KPageDirectorySize))==0); // following code assumes this alignment |
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void PageDirectoryAllocator::GlobalPdeChanged(TPde* aPde) |
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{ |
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__NK_ASSERT_DEBUG(MmuLock::IsHeld()); |
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__NK_ASSERT_DEBUG(TLinAddr(aPde)>=KPageDirectoryBase); |
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__NK_ASSERT_DEBUG(TLinAddr(aPde)<KPageDirectoryEnd); |
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__NK_ASSERT_DEBUG(KLocalPdSize==(TUint)KPageDirectorySize); // shouldn't be called if we have separate global PDs |
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TLinAddr addr = (TLinAddr(aPde)&KPageDirectoryMask)*(KChunkSize/sizeof(TPde)); |
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if(addr<KGlobalMemoryBase) |
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return; // change was in local part of PD, so nothing to do |
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if(addr-KIPCAlias<KIPCAliasAreaSize) |
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return; // change was in IPC alias area, so nothing to do |
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if(!iAllocator) |
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return; // not yet initialised |
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TRACE2(("PageDirectoryAllocator::GlobalPdeChanged(0x%08x)",aPde)); |
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TPde pde = *aPde; |
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TLinAddr pPde = KPageDirectoryBase+(TLinAddr(aPde)&KPageDirectoryMask); // first page directory |
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// copy PDE to all allocated page directories |
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pPde -= KPageDirectorySize; // start off at PD minus one |
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TLinAddr lastPd = KPageDirectoryBase+(KNumOsAsids-1)*KPageDirectorySize; |
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TUint32* ptr = iAllocator->iMap; |
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do |
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{ |
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TUint32 bits = ~*ptr++; |
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do |
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{ |
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pPde += KPageDirectorySize; // step to next page directory |
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if(bits&0x80000000u) |
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{ |
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TRACE2(("!PDE %x=%x",pPde,pde)); |
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*(TPde*)pPde = pde; |
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CacheMaintenance::SinglePdeUpdated(pPde); |
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} |
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} |
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while(bits<<=1); |
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pPde |= 31*KPageDirectorySize; // step to next group of 32 PDs |
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} |
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while(pPde<lastPd); |
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} |
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void PageDirectoryAllocator::Init2() |
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{ |
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TRACEB(("PageDirectoryAllocator::Init2()")); |
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// construct memory object for page directories... |
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#if defined(__CPU_PAGE_TABLES_FULLY_CACHED) |
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TMemoryAttributes memAttr = EMemoryAttributeStandard; |
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#else |
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TMemoryAttributes memAttr = (TMemoryAttributes)(EMemoryAttributeNormalUncached|EMemoryAttributeDefaultShareable); |
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#endif |
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TInt r = MM::InitFixedKernelMemory(iPageDirectoryMemory, KPageDirectoryBase, KPageDirectoryEnd, KPageDirectorySize, EMemoryObjectHardware, EMemoryCreateNoWipe, memAttr, EMappingCreateFixedVirtual); |
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__NK_ASSERT_ALWAYS(r==KErrNone); |
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// initialise kernel page directory... |
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TPhysAddr kernelPd = Mmu::LinearToPhysical((TLinAddr)Mmu::PageDirectory(KKernelOsAsid)); |
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iKernelPageDirectory = kernelPd; |
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((DMemModelProcess*)K::TheKernelProcess)->iPageDir = kernelPd; |
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AssignPages(KKernelOsAsid*(KPageDirectorySize>>KPageShift),KPageDirectorySize>>KPageShift,kernelPd); |
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|
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// construct allocator... |
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iAllocator = TBitMapAllocator::New(KNumOsAsids,ETrue); |
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__NK_ASSERT_ALWAYS(iAllocator); |
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iAllocator->Alloc(KKernelOsAsid,1); // kernel page directory already allocated |
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105 |
|
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TRACEB(("PageDirectoryAllocator::Init2 done")); |
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} |
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108 |
|
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109 |
|
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void PageDirectoryAllocator::AssignPages(TUint aIndex, TUint aCount, TPhysAddr aPhysAddr) |
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111 |
{ |
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__NK_ASSERT_DEBUG(aCount<=KMaxPageInfoUpdatesInOneGo); |
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MmuLock::Lock(); |
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SPageInfo* pi = SPageInfo::FromPhysAddr(aPhysAddr); |
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SPageInfo* piEnd = pi+aCount; |
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while(pi<piEnd) |
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{ |
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pi->SetPhysAlloc(iPageDirectoryMemory,aIndex); |
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++pi; |
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++aIndex; |
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} |
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MmuLock::Unlock(); |
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} |
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|
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|
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TInt PageDirectoryAllocator::Alloc(TUint aOsAsid, TPhysAddr& aPageDirectory) |
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{ |
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TRACE(("PageDirectoryAllocator::Alloc(%d)",aOsAsid)); |
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|
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// get memory for local page directory... |
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Mmu& m = TheMmu; |
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TUint offset = aOsAsid*KPageDirectorySize; |
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TPhysAddr pdPhys; |
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RamAllocLock::Lock(); |
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TInt r = m.AllocContiguousRam(pdPhys, KLocalPdPages, KLocalPdShift-KPageShift, iPageDirectoryMemory->RamAllocFlags()); |
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if(r==KErrNone) |
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AssignPages(offset>>KPageShift,KLocalPdPages,pdPhys); |
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RamAllocLock::Unlock(); |
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|
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if(r==KErrNone) |
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141 |
{ |
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TRACE(("PageDirectoryAllocator::Alloc pdPhys = 0x%08x",pdPhys)); |
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|
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// map local page directory... |
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r = MM::MemoryAddContiguous(iPageDirectoryMemory,MM::BytesToPages(offset),KLocalPdPages,pdPhys); |
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if(r!=KErrNone) |
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{ |
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RamAllocLock::Lock(); |
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m.FreeContiguousRam(pdPhys,KLocalPdPages); |
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RamAllocLock::Unlock(); |
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} |
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else |
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{ |
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aPageDirectory = pdPhys; |
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|
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TPde* pd = Mmu::PageDirectory(aOsAsid); |
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const TUint globalOffset = (KGlobalMemoryBase>>KChunkShift)*sizeof(TPde); // start of global part |
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|
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// clear local entries in page directory... |
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memclr(pd,globalOffset); |
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CacheMaintenance::PdesInitialised((TLinAddr)pd,globalOffset); |
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|
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if(KLocalPdSize<(TUint)KPageDirectorySize) |
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{ |
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// map global page directory after local part... |
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__NK_ASSERT_DEBUG(KLocalPdSize==globalOffset); |
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r = MM::MemoryAddContiguous(iPageDirectoryMemory, MM::BytesToPages(offset+KLocalPdSize), |
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(KPageDirectorySize-KLocalPdSize)/KPageSize, iKernelPageDirectory+KLocalPdSize); |
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__NK_ASSERT_DEBUG(r==KErrNone); // can't fail |
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MmuLock::Lock(); // need lock because allocator not otherwise atomic |
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iAllocator->Alloc(aOsAsid,1); |
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MmuLock::Unlock(); |
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} |
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else |
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{ |
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// copy global entries to local page directory... |
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TPde* globalPd = Mmu::PageDirectory(KKernelOsAsid); |
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MmuLock::Lock(); // need lock because allocator not otherwise atomic, also to make sure GlobalPdeChanged() only accesses extant PDs |
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memcpy((TUint8*)pd+globalOffset,(TUint8*)globalPd+globalOffset,KPageDirectorySize-globalOffset); |
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iAllocator->Alloc(aOsAsid,1); |
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MmuLock::Unlock(); |
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CacheMaintenance::PdesInitialised((TLinAddr)((TUint8*)pd+globalOffset),KPageDirectorySize-globalOffset); |
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} |
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} |
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} |
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TRACE(("PageDirectoryAllocator::Alloc returns %d",r)); |
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return r; |
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} |
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|
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|
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void PageDirectoryAllocator::Free(TUint aOsAsid) |
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{ |
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TRACE(("PageDirectoryAllocator::Free(%d)",aOsAsid)); |
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|
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MmuLock::Lock(); // need lock because allocator not otherwise atomic, also to make sure GlobalPdeChanged() only accesses extant PDs |
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iAllocator->Free(aOsAsid, 1); |
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MmuLock::Unlock(); |
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|
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const TUint KPageDirectoryPageCount = KPageDirectorySize>>KPageShift; |
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TPhysAddr pages[KPageDirectoryPageCount]; |
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TUint n = MM::MemoryRemovePages(iPageDirectoryMemory,aOsAsid*KPageDirectoryPageCount,KPageDirectoryPageCount,pages); |
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Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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(void)n; |
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Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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__NK_ASSERT_DEBUG(n==KPageDirectoryPageCount); |
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Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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|
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Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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RamAllocLock::Lock(); |
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Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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Mmu& m = TheMmu; |
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Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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// Page directories are fixed. |
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Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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m.FreeRam(pages, KLocalPdPages, EPageFixed); |
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Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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RamAllocLock::Unlock(); |
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Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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} |
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Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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211 |