|
0
|
1 |
// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
|
|
|
2 |
// All rights reserved.
|
|
|
3 |
// This component and the accompanying materials are made available
|
|
|
4 |
// under the terms of the License "Eclipse Public License v1.0"
|
|
|
5 |
// which accompanies this distribution, and is available
|
|
|
6 |
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
|
|
|
7 |
//
|
|
|
8 |
// Initial Contributors:
|
|
|
9 |
// Nokia Corporation - initial contribution.
|
|
|
10 |
//
|
|
|
11 |
// Contributors:
|
|
|
12 |
//
|
|
|
13 |
// Description:
|
|
|
14 |
//
|
|
|
15 |
|
|
|
16 |
#include <plat_priv.h>
|
|
|
17 |
#include "cache_maintenance.h"
|
|
|
18 |
#include "decompress.h" // include for the generic BytePairDecompress().
|
|
|
19 |
#include "mm.h"
|
|
|
20 |
#include "mmu.h"
|
|
|
21 |
#include "mpager.h"
|
|
|
22 |
#include "mmanager.h"
|
|
|
23 |
#include "mmapping.h"
|
|
|
24 |
#include "mobject.h"
|
|
|
25 |
#include "mcleanup.h"
|
|
|
26 |
|
|
|
27 |
|
|
|
28 |
//
|
|
|
29 |
// DMemoryManager
|
|
|
30 |
//
|
|
|
31 |
|
|
|
32 |
TInt DMemoryManager::New(DMemoryObject*& aMemory, TUint aSizeInPages, TMemoryAttributes aAttributes, TMemoryCreateFlags aCreateFlags)
|
|
|
33 |
{
|
|
|
34 |
DMemoryObject* memory;
|
|
|
35 |
if(aSizeInPages&(KChunkMask>>KPageShift))
|
|
|
36 |
memory = DFineMemory::New(this,aSizeInPages,aAttributes,aCreateFlags);
|
|
|
37 |
else
|
|
|
38 |
memory = DCoarseMemory::New(this,aSizeInPages,aAttributes,aCreateFlags);
|
|
|
39 |
aMemory = memory;
|
|
|
40 |
if(!memory)
|
|
|
41 |
return KErrNoMemory;
|
|
|
42 |
return KErrNone;
|
|
|
43 |
}
|
|
|
44 |
|
|
|
45 |
|
|
|
46 |
TInt DMemoryManager::Alloc(DMemoryObject* /*aMemory*/, TUint /*aIndex*/, TUint /*aCount*/)
|
|
|
47 |
{
|
|
|
48 |
return KErrNotSupported;
|
|
|
49 |
}
|
|
|
50 |
|
|
|
51 |
|
|
|
52 |
TInt DMemoryManager::AllocContiguous(DMemoryObject* /*aMemory*/, TUint /*aIndex*/, TUint /*aCount*/, TUint /*aAlign*/, TPhysAddr& /*aPhysAddr*/)
|
|
|
53 |
{
|
|
|
54 |
return KErrNotSupported;
|
|
|
55 |
}
|
|
|
56 |
|
|
|
57 |
|
|
|
58 |
void DMemoryManager::Free(DMemoryObject* /*aMemory*/, TUint /*aIndex*/, TUint /*aCount*/)
|
|
|
59 |
{
|
|
|
60 |
}
|
|
|
61 |
|
|
|
62 |
|
|
|
63 |
TInt DMemoryManager::Wipe(DMemoryObject* /*aMemory*/)
|
|
|
64 |
{
|
|
|
65 |
return KErrNotSupported;
|
|
|
66 |
}
|
|
|
67 |
|
|
|
68 |
|
|
|
69 |
TInt DMemoryManager::AddPages(DMemoryObject* /*aMemory*/, TUint /*aIndex*/, TUint /*aCount*/, TPhysAddr* /*aPages*/)
|
|
|
70 |
{
|
|
|
71 |
return KErrNotSupported;
|
|
|
72 |
}
|
|
|
73 |
|
|
|
74 |
|
|
|
75 |
TInt DMemoryManager::AddContiguous(DMemoryObject* /*aMemory*/, TUint /*aIndex*/, TUint /*aCount*/, TPhysAddr /*aPhysAddr*/)
|
|
|
76 |
{
|
|
|
77 |
return KErrNotSupported;
|
|
|
78 |
}
|
|
|
79 |
|
|
|
80 |
|
|
|
81 |
TInt DMemoryManager::RemovePages(DMemoryObject* /*aMemory*/, TUint /*aIndex*/, TUint /*aCount*/, TPhysAddr* /*aPages*/)
|
|
|
82 |
{
|
|
|
83 |
return KErrNotSupported;
|
|
|
84 |
}
|
|
|
85 |
|
|
|
86 |
|
|
|
87 |
TInt DMemoryManager::AllowDiscard(DMemoryObject* /*aMemory*/, TUint /*aIndex*/, TUint /*aCount*/)
|
|
|
88 |
{
|
|
|
89 |
return KErrNotSupported;
|
|
|
90 |
}
|
|
|
91 |
|
|
|
92 |
|
|
|
93 |
TInt DMemoryManager::DisallowDiscard(DMemoryObject* /*aMemory*/, TUint /*aIndex*/, TUint /*aCount*/)
|
|
|
94 |
{
|
|
|
95 |
return KErrNotSupported;
|
|
|
96 |
}
|
|
|
97 |
|
|
|
98 |
|
|
|
99 |
TInt DMemoryManager::StealPage(DMemoryObject* /*aMemory*/, SPageInfo* /*aPageInfo*/)
|
|
|
100 |
{
|
|
|
101 |
return KErrNotSupported;
|
|
|
102 |
}
|
|
|
103 |
|
|
|
104 |
|
|
|
105 |
TInt DMemoryManager::RestrictPage(DMemoryObject* /*aMemory*/, SPageInfo* /*aPageInfo*/, TRestrictPagesType /*aRestriction*/)
|
|
|
106 |
{
|
|
|
107 |
return KErrNotSupported;
|
|
|
108 |
}
|
|
|
109 |
|
|
|
110 |
|
|
|
111 |
TInt DMemoryManager::CleanPage(DMemoryObject* aMemory, SPageInfo* aPageInfo, TPhysAddr*& /*aPageArrayEntry*/)
|
|
|
112 |
{
|
|
|
113 |
if(aPageInfo->IsDirty()==false)
|
|
|
114 |
return KErrNone;
|
|
|
115 |
__NK_ASSERT_DEBUG(0);
|
|
|
116 |
return KErrNotSupported;
|
|
|
117 |
}
|
|
|
118 |
|
|
|
119 |
|
|
|
120 |
TInt DMemoryManager::HandleFault( DMemoryObject* aMemory, TUint aIndex, DMemoryMapping* aMapping,
|
|
|
121 |
TUint aMapInstanceCount, TUint aAccessPermissions)
|
|
|
122 |
{
|
|
|
123 |
(void)aMemory;
|
|
|
124 |
(void)aIndex;
|
|
|
125 |
(void)aMapping;
|
|
|
126 |
(void)aMapInstanceCount;
|
|
|
127 |
(void)aAccessPermissions;
|
|
|
128 |
// Kern::Printf("DMemoryManager::HandlePageFault(0x%08x,0x%x,0x%08x,%d)",aMemory,aIndex,aMapping,aAccessPermissions);
|
|
|
129 |
return KErrAbort;
|
|
|
130 |
}
|
|
|
131 |
|
|
|
132 |
|
|
|
133 |
TInt DMemoryManager::MovePage( DMemoryObject* aMemory, SPageInfo* aOldPageInfo,
|
|
|
134 |
TPhysAddr& aNewPage, TUint aBlockZoneId, TBool aBlockRest)
|
|
|
135 |
{
|
|
|
136 |
return KErrNotSupported;
|
|
|
137 |
}
|
|
|
138 |
|
|
|
139 |
TZonePageType DMemoryManager::PageType()
|
|
|
140 |
{// This should not be invoked on memory managers that do not use the methods
|
|
|
141 |
// AllocPages() and FreePages().
|
|
|
142 |
__NK_ASSERT_DEBUG(0);
|
|
|
143 |
return EPageFixed;
|
|
|
144 |
}
|
|
|
145 |
|
|
|
146 |
static TMemoryCleanup Cleanup;
|
|
|
147 |
|
|
|
148 |
DMemoryObject* DMemoryManager::iCleanupHead = 0;
|
|
|
149 |
TSpinLock DMemoryManager::iCleanupLock(TSpinLock::EOrderGenericIrqHigh3);
|
|
|
150 |
|
|
|
151 |
void DMemoryManager::CleanupFunction(TAny*)
|
|
|
152 |
{
|
|
|
153 |
for(;;)
|
|
|
154 |
{
|
|
|
155 |
__SPIN_LOCK_IRQ(iCleanupLock);
|
|
|
156 |
|
|
|
157 |
// get an object from queue...
|
|
|
158 |
DMemoryObject* memory = iCleanupHead;
|
|
|
159 |
if(!memory)
|
|
|
160 |
{
|
|
|
161 |
// none left, so end...
|
|
|
162 |
__SPIN_UNLOCK_IRQ(iCleanupLock);
|
|
|
163 |
return;
|
|
|
164 |
}
|
|
|
165 |
|
|
|
166 |
if(memory->iCleanupFlags&ECleanupDecommitted)
|
|
|
167 |
{
|
|
|
168 |
// object requires cleanup of decommitted pages...
|
|
|
169 |
memory->iCleanupFlags &= ~ECleanupDecommitted;
|
|
|
170 |
__SPIN_UNLOCK_IRQ(iCleanupLock);
|
|
|
171 |
memory->iManager->DoCleanupDecommitted(memory);
|
|
|
172 |
}
|
|
|
173 |
else
|
|
|
174 |
{
|
|
|
175 |
// object has no more cleanup operations to perform,
|
|
|
176 |
// so remove it from the cleanup queue...
|
|
|
177 |
__NK_ASSERT_DEBUG(memory->iCleanupFlags==ECleanupIsQueued); // no operations left, just flag to say its in the cleanup queue
|
|
|
178 |
memory->iCleanupFlags &= ~ECleanupIsQueued;
|
|
|
179 |
iCleanupHead = memory->iCleanupNext;
|
|
|
180 |
memory->iCleanupNext = NULL;
|
|
|
181 |
__SPIN_UNLOCK_IRQ(iCleanupLock);
|
|
|
182 |
|
|
|
183 |
// close reference which was added when object was queued...
|
|
|
184 |
memory->Close();
|
|
|
185 |
}
|
|
|
186 |
}
|
|
|
187 |
}
|
|
|
188 |
|
|
|
189 |
|
|
|
190 |
void DMemoryManager::QueueCleanup(DMemoryObject* aMemory, TCleanupOperationFlag aCleanupOp)
|
|
|
191 |
{
|
|
|
192 |
// add new cleanup operation...
|
|
|
193 |
__SPIN_LOCK_IRQ(iCleanupLock);
|
|
|
194 |
TUint32 oldFlags = aMemory->iCleanupFlags;
|
|
|
195 |
aMemory->iCleanupFlags = oldFlags|aCleanupOp|ECleanupIsQueued;
|
|
|
196 |
__SPIN_UNLOCK_IRQ(iCleanupLock);
|
|
|
197 |
|
|
|
198 |
// if cleanup was already requested...
|
|
|
199 |
if(oldFlags)
|
|
|
200 |
return; // nothing more to do
|
|
|
201 |
|
|
|
202 |
// increase reference count...
|
|
|
203 |
aMemory->Open();
|
|
|
204 |
|
|
|
205 |
// add object to cleanup queue...
|
|
|
206 |
__SPIN_LOCK_IRQ(iCleanupLock);
|
|
|
207 |
aMemory->iCleanupNext = iCleanupHead;
|
|
|
208 |
iCleanupHead = aMemory;
|
|
|
209 |
__SPIN_UNLOCK_IRQ(iCleanupLock);
|
|
|
210 |
|
|
|
211 |
// queue cleanup function to run...
|
|
|
212 |
Cleanup.Add((TMemoryCleanupCallback)CleanupFunction,0);
|
|
|
213 |
}
|
|
|
214 |
|
|
|
215 |
|
|
|
216 |
void DMemoryManager::DoCleanupDecommitted(DMemoryObject* aMemory)
|
|
|
217 |
{
|
|
|
218 |
TRACE2(("DMemoryManager::DoCleanupDecommitted(0x%08x)",aMemory));
|
|
|
219 |
__NK_ASSERT_DEBUG(0);
|
|
|
220 |
}
|
|
|
221 |
|
|
|
222 |
|
|
|
223 |
void DMemoryManager::ReAllocDecommitted(DMemoryObject* aMemory, TUint aIndex, TUint aCount)
|
|
|
224 |
{
|
|
|
225 |
__NK_ASSERT_DEBUG(MemoryObjectLock::IsHeld(aMemory));
|
|
|
226 |
|
|
|
227 |
// make iterator for region...
|
|
|
228 |
RPageArray::TIter pageIter;
|
|
|
229 |
aMemory->iPages.FindStart(aIndex,aCount,pageIter);
|
|
|
230 |
|
|
|
231 |
for(;;)
|
|
|
232 |
{
|
|
|
233 |
// find some pages...
|
|
|
234 |
RPageArray::TIter pageList;
|
|
|
235 |
TUint n = pageIter.Find(pageList);
|
|
|
236 |
if(!n)
|
|
|
237 |
break;
|
|
|
238 |
|
|
|
239 |
// check each existing page...
|
|
|
240 |
RamAllocLock::Lock();
|
|
|
241 |
TPhysAddr* pages;
|
|
|
242 |
while(pageList.Pages(pages))
|
|
|
243 |
{
|
|
|
244 |
TPhysAddr page = *pages;
|
|
|
245 |
if(RPageArray::State(page)==RPageArray::EDecommitted)
|
|
|
246 |
{
|
|
|
247 |
// decommitted pages need re-initialising...
|
|
|
248 |
TPhysAddr pagePhys = page&~KPageMask;
|
|
|
249 |
*pages = pagePhys|RPageArray::ECommitted;
|
|
|
250 |
TheMmu.PagesAllocated(&pagePhys,1,aMemory->RamAllocFlags(),true);
|
|
|
251 |
}
|
|
|
252 |
pageList.Skip(1);
|
|
|
253 |
}
|
|
|
254 |
RamAllocLock::Unlock();
|
|
|
255 |
|
|
|
256 |
// move on...
|
|
|
257 |
pageIter.FindRelease(n);
|
|
|
258 |
}
|
|
|
259 |
|
|
|
260 |
aMemory->iPages.FindEnd(aIndex,aCount);
|
|
|
261 |
}
|
|
|
262 |
|
|
|
263 |
|
|
|
264 |
void DMemoryManager::FreeDecommitted(DMemoryObject* aMemory, TUint aIndex, TUint aCount)
|
|
|
265 |
{
|
|
|
266 |
TRACE2(("DMemoryManager::FreeDecommitted(0x%08x,0x%x,0x%x)",aMemory, aIndex, aCount));
|
|
|
267 |
__NK_ASSERT_DEBUG(MemoryObjectLock::IsHeld(aMemory));
|
|
|
268 |
|
|
|
269 |
// make iterator for region...
|
|
|
270 |
RPageArray::TIter pageIter;
|
|
|
271 |
aMemory->iPages.FindStart(aIndex,aCount,pageIter);
|
|
|
272 |
|
|
|
273 |
for(;;)
|
|
|
274 |
{
|
|
|
275 |
// find some pages...
|
|
|
276 |
RPageArray::TIter pageList;
|
|
|
277 |
TUint findCount = pageIter.Find(pageList);
|
|
|
278 |
if(!findCount)
|
|
|
279 |
break;
|
|
|
280 |
|
|
|
281 |
// search for decommitted pages...
|
|
|
282 |
RamAllocLock::Lock();
|
|
|
283 |
TPhysAddr* pages;
|
|
|
284 |
TUint numPages;
|
|
|
285 |
while((numPages=pageList.Pages(pages))!=0)
|
|
|
286 |
{
|
|
|
287 |
TUint n=0;
|
|
|
288 |
if(RPageArray::State(pages[n])!=RPageArray::EDecommitted)
|
|
|
289 |
{
|
|
|
290 |
// skip pages which aren't EDecommitted...
|
|
|
291 |
while(++n<numPages && RPageArray::State(pages[n])!=RPageArray::EDecommitted)
|
|
|
292 |
{}
|
|
|
293 |
}
|
|
|
294 |
else
|
|
|
295 |
{
|
|
|
296 |
// find range of pages which are EDecommitted...
|
|
|
297 |
while(++n<numPages && RPageArray::State(pages[n])==RPageArray::EDecommitted)
|
|
|
298 |
{}
|
|
|
299 |
RPageArray::TIter decommittedList(pageList.Left(n));
|
|
|
300 |
|
|
|
301 |
// free pages...
|
|
|
302 |
TUint freedCount = FreePages(aMemory,decommittedList);
|
|
|
303 |
(void)freedCount;
|
|
|
304 |
TRACE2(("DMemoryManager::FreeDecommitted(0x%08x) freed %d in 0x%x..0x%x",aMemory,freedCount,decommittedList.Index(),decommittedList.IndexEnd()));
|
|
|
305 |
}
|
|
|
306 |
pageList.Skip(n);
|
|
|
307 |
}
|
|
|
308 |
RamAllocLock::Unlock();
|
|
|
309 |
|
|
|
310 |
// move on...
|
|
|
311 |
pageIter.FindRelease(findCount);
|
|
|
312 |
}
|
|
|
313 |
|
|
|
314 |
aMemory->iPages.FindEnd(aIndex,aCount);
|
|
|
315 |
}
|
|
|
316 |
|
|
|
317 |
|
|
|
318 |
void DMemoryManager::DoFree(DMemoryObject* aMemory, TUint aIndex, TUint aCount)
|
|
|
319 |
{
|
|
|
320 |
TRACE2(("DMemoryManager::DoFree(0x%08x,0x%x,0x%x)",aMemory, aIndex, aCount));
|
|
|
321 |
__NK_ASSERT_DEBUG(MemoryObjectLock::IsHeld(aMemory));
|
|
|
322 |
|
|
|
323 |
RPageArray::TIter pageIter;
|
|
|
324 |
aMemory->iPages.FindStart(aIndex,aCount,pageIter);
|
|
|
325 |
|
|
|
326 |
for(;;)
|
|
|
327 |
{
|
|
|
328 |
// find some pages...
|
|
|
329 |
RPageArray::TIter pageList;
|
|
|
330 |
TUint n = pageIter.RemoveFind(pageList);
|
|
|
331 |
if(!n)
|
|
|
332 |
break;
|
|
|
333 |
|
|
|
334 |
// free pages...
|
|
|
335 |
FreePages(aMemory,pageList);
|
|
|
336 |
|
|
|
337 |
// move on...
|
|
|
338 |
pageIter.FindRelease(n);
|
|
|
339 |
}
|
|
|
340 |
|
|
|
341 |
aMemory->iPages.FindEnd(aIndex,aCount);
|
|
|
342 |
}
|
|
|
343 |
|
|
|
344 |
|
|
|
345 |
TInt DMemoryManager::FreePages(DMemoryObject* aMemory, RPageArray::TIter aPageList)
|
|
|
346 |
{
|
|
|
347 |
// unmap the pages...
|
|
|
348 |
aMemory->UnmapPages(aPageList,true);
|
|
|
349 |
|
|
|
350 |
RamAllocLock::Lock();
|
|
|
351 |
|
|
|
352 |
// remove and free pages...
|
|
|
353 |
Mmu& m = TheMmu;
|
|
|
354 |
TUint count = 0;
|
|
|
355 |
TPhysAddr pages[KMaxPagesInOneGo];
|
|
|
356 |
TUint n;
|
|
|
357 |
while((n=aPageList.Remove(KMaxPagesInOneGo,pages))!=0)
|
|
|
358 |
{
|
|
|
359 |
count += n;
|
|
|
360 |
m.FreeRam(pages, n, aMemory->iManager->PageType());
|
|
|
361 |
}
|
|
|
362 |
|
|
|
363 |
RamAllocLock::Unlock();
|
|
|
364 |
|
|
|
365 |
return count;
|
|
|
366 |
}
|
|
|
367 |
|
|
|
368 |
|
|
|
369 |
|
|
|
370 |
/**
|
|
|
371 |
Manager for memory objects containing normal unpaged program memory (RAM) which
|
|
|
372 |
is allocated from a system wide pool. The physical pages allocated to this
|
|
|
373 |
memory are fixed until explicitly freed.
|
|
|
374 |
|
|
|
375 |
This is normally used for kernel memory and any other situation where it
|
|
|
376 |
is not permissible for memory accesses to generate page faults of any kind.
|
|
|
377 |
*/
|
|
|
378 |
class DUnpagedMemoryManager : public DMemoryManager
|
|
|
379 |
{
|
|
|
380 |
public:
|
|
|
381 |
// from DMemoryManager...
|
|
|
382 |
virtual void Destruct(DMemoryObject* aMemory);
|
|
|
383 |
virtual TInt Alloc(DMemoryObject* aMemory, TUint aIndex, TUint aCount);
|
|
|
384 |
virtual TInt AllocContiguous(DMemoryObject* aMemory, TUint aIndex, TUint aCount, TUint aAlign, TPhysAddr& aPhysAddr);
|
|
|
385 |
virtual void Free(DMemoryObject* aMemory, TUint aIndex, TUint aCount);
|
|
|
386 |
virtual TInt Pin(DMemoryObject* aMemory, DMemoryMappingBase* aMapping, TPinArgs& aPinArgs);
|
|
|
387 |
virtual void Unpin(DMemoryObject* aMemory, DMemoryMappingBase* aMapping, TPinArgs& aPinArgs);
|
|
|
388 |
virtual TInt Wipe(DMemoryObject* aMemory);
|
|
|
389 |
virtual TZonePageType PageType();
|
|
|
390 |
|
|
|
391 |
private:
|
|
|
392 |
// from DMemoryManager...
|
|
|
393 |
virtual void DoCleanupDecommitted(DMemoryObject* aMemory);
|
|
|
394 |
|
|
|
395 |
/**
|
|
|
396 |
Implementation factor for implementation of #Alloc.
|
|
|
397 |
*/
|
|
|
398 |
static TInt AllocPages(DMemoryObject* aMemory, RPageArray::TIter aPageList);
|
|
|
399 |
|
|
|
400 |
/**
|
|
|
401 |
Implementation factor for implementation of #AllocContiguous.
|
|
|
402 |
*/
|
|
|
403 |
static TInt AllocContiguousPages(DMemoryObject* aMemory, RPageArray::TIter aPageList, TUint aAlign, TPhysAddr& aPhysAddr);
|
|
|
404 |
|
|
|
405 |
/**
|
|
|
406 |
Implementation factor for implementation of #Wipe.
|
|
|
407 |
*/
|
|
|
408 |
static void WipePages(DMemoryObject* aMemory, RPageArray::TIter aPageList);
|
|
|
409 |
|
|
|
410 |
public:
|
|
|
411 |
/**
|
|
|
412 |
The single instance of this manager class.
|
|
|
413 |
*/
|
|
|
414 |
static DUnpagedMemoryManager TheManager;
|
|
|
415 |
};
|
|
|
416 |
|
|
|
417 |
|
|
|
418 |
DUnpagedMemoryManager DUnpagedMemoryManager::TheManager;
|
|
|
419 |
DMemoryManager* TheUnpagedMemoryManager = &DUnpagedMemoryManager::TheManager;
|
|
|
420 |
|
|
|
421 |
|
|
|
422 |
void DUnpagedMemoryManager::Destruct(DMemoryObject* aMemory)
|
|
|
423 |
{
|
|
|
424 |
MemoryObjectLock::Lock(aMemory);
|
|
|
425 |
Free(aMemory,0,aMemory->iSizeInPages);
|
|
|
426 |
MemoryObjectLock::Unlock(aMemory);
|
|
|
427 |
aMemory->Close();
|
|
|
428 |
}
|
|
|
429 |
|
|
|
430 |
|
|
|
431 |
TInt DUnpagedMemoryManager::Alloc(DMemoryObject* aMemory, TUint aIndex, TUint aCount)
|
|
|
432 |
{
|
|
|
433 |
TRACE2(("DUnpagedMemoryManager::Alloc(0x%08x,0x%x,0x%x)",aMemory, aIndex, aCount));
|
|
|
434 |
__NK_ASSERT_DEBUG(MemoryObjectLock::IsHeld(aMemory));
|
|
|
435 |
|
|
|
436 |
// re-initialise any decommitted pages which we may still own because they were pinned...
|
|
|
437 |
ReAllocDecommitted(aMemory,aIndex,aCount);
|
|
|
438 |
|
|
|
439 |
// check and allocate page array entries...
|
|
|
440 |
RPageArray::TIter pageList;
|
|
|
441 |
TInt r = aMemory->iPages.AddStart(aIndex,aCount,pageList,true);
|
|
|
442 |
if(r!=KErrNone)
|
|
|
443 |
return r;
|
|
|
444 |
|
|
|
445 |
// allocate RAM and add it to page array...
|
|
|
446 |
r = AllocPages(aMemory,pageList);
|
|
|
447 |
|
|
|
448 |
// map pages...
|
|
|
449 |
if(r==KErrNone)
|
|
|
450 |
r = aMemory->MapPages(pageList);
|
|
|
451 |
|
|
|
452 |
// release page array entries...
|
|
|
453 |
aMemory->iPages.AddEnd(aIndex,aCount);
|
|
|
454 |
|
|
|
455 |
// revert if error...
|
|
|
456 |
if(r!=KErrNone)
|
|
|
457 |
Free(aMemory,aIndex,aCount);
|
|
|
458 |
|
|
|
459 |
return r;
|
|
|
460 |
}
|
|
|
461 |
|
|
|
462 |
|
|
|
463 |
TInt DUnpagedMemoryManager::AllocContiguous(DMemoryObject* aMemory, TUint aIndex, TUint aCount, TUint aAlign, TPhysAddr& aPhysAddr)
|
|
|
464 |
{
|
|
|
465 |
TRACE2(("DUnpagedMemoryManager::AllocContiguous(0x%08x,0x%x,0x%x,%d,?)",aMemory, aIndex, aCount, aAlign));
|
|
|
466 |
__NK_ASSERT_DEBUG(MemoryObjectLock::IsHeld(aMemory));
|
|
|
467 |
|
|
|
468 |
// set invalid memory in case of error...
|
|
|
469 |
aPhysAddr = KPhysAddrInvalid;
|
|
|
470 |
|
|
|
471 |
// check and allocate page array entries...
|
|
|
472 |
RPageArray::TIter pageList;
|
|
|
473 |
TInt r = aMemory->iPages.AddStart(aIndex,aCount,pageList);
|
|
|
474 |
if(r!=KErrNone)
|
|
|
475 |
return r;
|
|
|
476 |
|
|
|
477 |
// allocate memory...
|
|
|
478 |
TPhysAddr physAddr;
|
|
|
479 |
r = AllocContiguousPages(aMemory, pageList, aAlign, physAddr);
|
|
|
480 |
|
|
|
481 |
// map memory...
|
|
|
482 |
if(r==KErrNone)
|
|
|
483 |
{
|
|
|
484 |
r = aMemory->MapPages(pageList);
|
|
|
485 |
if(r==KErrNone)
|
|
|
486 |
aPhysAddr = physAddr;
|
|
|
487 |
}
|
|
|
488 |
|
|
|
489 |
// release page array entries...
|
|
|
490 |
aMemory->iPages.AddEnd(aIndex,aCount);
|
|
|
491 |
|
|
|
492 |
// revert if error...
|
|
|
493 |
if(r!=KErrNone)
|
|
|
494 |
Free(aMemory,aIndex,aCount);
|
|
|
495 |
|
|
|
496 |
return r;
|
|
|
497 |
}
|
|
|
498 |
|
|
|
499 |
|
|
|
500 |
void DUnpagedMemoryManager::Free(DMemoryObject* aMemory, TUint aIndex, TUint aCount)
|
|
|
501 |
{
|
|
|
502 |
DoFree(aMemory,aIndex,aCount);
|
|
|
503 |
}
|
|
|
504 |
|
|
|
505 |
|
|
|
506 |
TInt DUnpagedMemoryManager::AllocPages(DMemoryObject* aMemory, RPageArray::TIter aPageList)
|
|
|
507 |
{
|
|
|
508 |
TInt r = KErrNone;
|
|
|
509 |
RamAllocLock::Lock();
|
|
|
510 |
|
|
|
511 |
Mmu& m = TheMmu;
|
|
|
512 |
for(;;)
|
|
|
513 |
{
|
|
|
514 |
// find entries in page array to allocate...
|
|
|
515 |
RPageArray::TIter allocList;
|
|
|
516 |
TUint n = aPageList.AddFind(allocList);
|
|
|
517 |
if(!n)
|
|
|
518 |
break;
|
|
|
519 |
|
|
|
520 |
do
|
|
|
521 |
{
|
|
|
522 |
// allocate ram...
|
|
|
523 |
TPhysAddr pages[KMaxPagesInOneGo];
|
|
|
524 |
if(n>KMaxPagesInOneGo)
|
|
|
525 |
n = KMaxPagesInOneGo;
|
|
|
526 |
r = m.AllocRam(pages, n, aMemory->RamAllocFlags(), aMemory->iManager->PageType());
|
|
|
527 |
if(r!=KErrNone)
|
|
|
528 |
goto done;
|
|
|
529 |
|
|
|
530 |
// assign pages to memory object...
|
|
|
531 |
{
|
|
|
532 |
TUint index = allocList.Index();
|
|
|
533 |
TUint flags = aMemory->PageInfoFlags();
|
|
|
534 |
TUint i=0;
|
|
|
535 |
MmuLock::Lock();
|
|
|
536 |
do
|
|
|
537 |
{
|
|
|
538 |
SPageInfo* pi = SPageInfo::FromPhysAddr(pages[i]);
|
|
|
539 |
pi->SetManaged(aMemory,index+i,flags);
|
|
|
540 |
}
|
|
|
541 |
while(++i<n);
|
|
|
542 |
MmuLock::Unlock();
|
|
|
543 |
}
|
|
|
544 |
|
|
|
545 |
// add pages to page array...
|
|
|
546 |
allocList.Add(n,pages);
|
|
|
547 |
}
|
|
|
548 |
while((n=allocList.Count())!=0);
|
|
|
549 |
}
|
|
|
550 |
done:
|
|
|
551 |
RamAllocLock::Unlock();
|
|
|
552 |
return r;
|
|
|
553 |
}
|
|
|
554 |
|
|
|
555 |
|
|
|
556 |
TInt DUnpagedMemoryManager::AllocContiguousPages(DMemoryObject* aMemory, RPageArray::TIter aPageList, TUint aAlign, TPhysAddr& aPhysAddr)
|
|
|
557 |
{
|
|
|
558 |
TUint size = aPageList.Count();
|
|
|
559 |
RamAllocLock::Lock();
|
|
|
560 |
|
|
|
561 |
// allocate memory...
|
|
|
562 |
Mmu& m = TheMmu;
|
|
|
563 |
TPhysAddr physAddr;
|
|
|
564 |
TInt r = m.AllocContiguousRam(physAddr, size, aAlign, aMemory->RamAllocFlags());
|
|
|
565 |
if(r==KErrNone)
|
|
|
566 |
{
|
|
|
567 |
// assign pages to memory object...
|
|
|
568 |
TUint index = aPageList.Index();
|
|
|
569 |
TUint flags = aMemory->PageInfoFlags();
|
|
|
570 |
SPageInfo* pi = SPageInfo::FromPhysAddr(physAddr);
|
|
|
571 |
SPageInfo* piEnd = pi+size;
|
|
|
572 |
TUint flash = 0;
|
|
|
573 |
MmuLock::Lock();
|
|
|
574 |
while(pi<piEnd)
|
|
|
575 |
{
|
|
|
576 |
MmuLock::Flash(flash,KMaxPageInfoUpdatesInOneGo);
|
|
|
577 |
pi->SetManaged(aMemory,index++,flags);
|
|
|
578 |
++pi;
|
|
|
579 |
}
|
|
|
580 |
MmuLock::Unlock();
|
|
|
581 |
|
|
|
582 |
// add pages to page array...
|
|
|
583 |
aPageList.AddContiguous(size,physAddr);
|
|
|
584 |
|
|
|
585 |
// set result...
|
|
|
586 |
aPhysAddr = physAddr;
|
|
|
587 |
}
|
|
|
588 |
|
|
|
589 |
RamAllocLock::Unlock();
|
|
|
590 |
return r;
|
|
|
591 |
}
|
|
|
592 |
|
|
|
593 |
|
|
|
594 |
TInt DUnpagedMemoryManager::Pin(DMemoryObject* aMemory, DMemoryMappingBase* aMapping, TPinArgs& aPinArgs)
|
|
|
595 |
{
|
|
|
596 |
RPageArray::TIter pageList;
|
|
|
597 |
aMemory->iPages.FindStart(aMapping->iStartIndex,aMapping->iSizeInPages,pageList);
|
|
|
598 |
|
|
|
599 |
MmuLock::Lock();
|
|
|
600 |
|
|
|
601 |
TUint n;
|
|
|
602 |
TPhysAddr* pages;
|
|
|
603 |
TUint flash = 0;
|
|
|
604 |
while((n=pageList.Pages(pages,KMaxPageInfoUpdatesInOneGo))!=0)
|
|
|
605 |
{
|
|
|
606 |
TPhysAddr* p = pages;
|
|
|
607 |
TPhysAddr* pEnd = p+n;
|
|
|
608 |
do
|
|
|
609 |
{
|
|
|
610 |
TPhysAddr page = *p++;
|
|
|
611 |
if(RPageArray::TargetStateIsDecommitted(page))
|
|
|
612 |
goto stop; // page is being decommitted, so can't pin it
|
|
|
613 |
}
|
|
|
614 |
while(p!=pEnd);
|
|
|
615 |
pageList.Skip(n);
|
|
|
616 |
flash += n;
|
|
|
617 |
MmuLock::Flash(flash,KMaxPageInfoUpdatesInOneGo);
|
|
|
618 |
}
|
|
|
619 |
stop:
|
|
|
620 |
MmuLock::Unlock();
|
|
|
621 |
|
|
|
622 |
aMemory->iPages.FindEnd(aMapping->iStartIndex,aMapping->iSizeInPages);
|
|
|
623 |
|
|
|
624 |
return pageList.Count() ? KErrNotFound : KErrNone;
|
|
|
625 |
}
|
|
|
626 |
|
|
|
627 |
|
|
|
628 |
void DUnpagedMemoryManager::Unpin(DMemoryObject* aMemory, DMemoryMappingBase* aMapping, TPinArgs& aPinArgs)
|
|
|
629 |
{
|
|
|
630 |
}
|
|
|
631 |
|
|
|
632 |
|
|
|
633 |
void DUnpagedMemoryManager::DoCleanupDecommitted(DMemoryObject* aMemory)
|
|
|
634 |
{
|
|
|
635 |
MemoryObjectLock::Lock(aMemory);
|
|
|
636 |
FreeDecommitted(aMemory,0,aMemory->iSizeInPages);
|
|
|
637 |
MemoryObjectLock::Unlock(aMemory);
|
|
|
638 |
}
|
|
|
639 |
|
|
|
640 |
|
|
|
641 |
TInt DUnpagedMemoryManager::Wipe(DMemoryObject* aMemory)
|
|
|
642 |
{
|
|
|
643 |
__NK_ASSERT_DEBUG(MemoryObjectLock::IsHeld(aMemory));
|
|
|
644 |
|
|
|
645 |
// make iterator for region...
|
|
|
646 |
RPageArray::TIter pageIter;
|
|
|
647 |
aMemory->iPages.FindStart(0,aMemory->iSizeInPages,pageIter);
|
|
|
648 |
|
|
|
649 |
for(;;)
|
|
|
650 |
{
|
|
|
651 |
// find some pages...
|
|
|
652 |
RPageArray::TIter pageList;
|
|
|
653 |
TUint n = pageIter.Find(pageList);
|
|
|
654 |
if(!n)
|
|
|
655 |
break;
|
|
|
656 |
|
|
|
657 |
// wipe some pages...
|
|
|
658 |
WipePages(aMemory,pageList);
|
|
|
659 |
|
|
|
660 |
// move on...
|
|
|
661 |
pageIter.FindRelease(n);
|
|
|
662 |
}
|
|
|
663 |
|
|
|
664 |
aMemory->iPages.FindEnd(0,aMemory->iSizeInPages);
|
|
|
665 |
|
|
|
666 |
return KErrNone;
|
|
|
667 |
}
|
|
|
668 |
|
|
|
669 |
|
|
|
670 |
void DUnpagedMemoryManager::WipePages(DMemoryObject* aMemory, RPageArray::TIter aPageList)
|
|
|
671 |
{
|
|
|
672 |
TUint index = aPageList.Index();
|
|
|
673 |
TUint count = aPageList.Count();
|
|
|
674 |
TRACE(("DUnpagedMemoryManager::WipePages(0x%08x,0x%x,0x%x)",aMemory,index,count));
|
|
|
675 |
|
|
|
676 |
__NK_ASSERT_ALWAYS(!aMemory->IsReadOnly()); // trap wiping read-only memory
|
|
|
677 |
|
|
|
678 |
RamAllocLock::Lock();
|
|
|
679 |
|
|
|
680 |
while(count)
|
|
|
681 |
{
|
|
|
682 |
// get some physical page addresses...
|
|
|
683 |
TPhysAddr pages[KMaxPagesInOneGo];
|
|
|
684 |
TPhysAddr physAddr;
|
|
|
685 |
TUint n = count;
|
|
|
686 |
if(n>KMaxPagesInOneGo)
|
|
|
687 |
n = KMaxPagesInOneGo;
|
|
|
688 |
TInt r = aMemory->iPages.PhysAddr(index,n,physAddr,pages);
|
|
|
689 |
__NK_ASSERT_ALWAYS(r>=0); // caller should have ensured all pages are present
|
|
|
690 |
|
|
|
691 |
// wipe some pages...
|
|
|
692 |
TPhysAddr* pagesToWipe = r!=0 ? pages : (TPhysAddr*)((TLinAddr)physAddr|1);
|
|
|
693 |
TheMmu.PagesAllocated(pagesToWipe,n,aMemory->RamAllocFlags(),true);
|
|
|
694 |
|
|
|
695 |
// move on...
|
|
|
696 |
index += n;
|
|
|
697 |
count -= n;
|
|
|
698 |
}
|
|
|
699 |
|
|
|
700 |
RamAllocLock::Unlock();
|
|
|
701 |
}
|
|
|
702 |
|
|
|
703 |
|
|
|
704 |
TZonePageType DUnpagedMemoryManager::PageType()
|
|
|
705 |
{// Unpaged memory cannot be moved or discarded therefore it is fixed.
|
|
|
706 |
return EPageFixed;
|
|
|
707 |
}
|
|
|
708 |
|
|
|
709 |
|
|
|
710 |
/**
|
|
|
711 |
Manager for memory objects containing normal unpaged RAM, as
|
|
|
712 |
#DUnpagedMemoryManager, but which may be 'moved' by RAM
|
|
|
713 |
defragmentation. I.e. have the physical pages used to store its content
|
|
|
714 |
substituted for others.
|
|
|
715 |
|
|
|
716 |
Such memory may cause transient page faults if it is accessed whilst its
|
|
|
717 |
contents are being moved, this makes it unsuitable for most kernel-side
|
|
|
718 |
usage. This is the memory management scheme normally used for unpaged user
|
|
|
719 |
memory.
|
|
|
720 |
*/
|
|
|
721 |
class DMovableMemoryManager : public DUnpagedMemoryManager
|
|
|
722 |
{
|
|
|
723 |
public:
|
|
|
724 |
// from DMemoryManager...
|
|
|
725 |
virtual TInt MovePage(DMemoryObject* aMemory, SPageInfo* aOldPageInfo, TPhysAddr& aNewPage, TUint aBlockZoneId, TBool aBlockRest);
|
|
|
726 |
virtual TInt HandleFault( DMemoryObject* aMemory, TUint aIndex, DMemoryMapping* aMapping,
|
|
|
727 |
TUint aMapInstanceCount, TUint aAccessPermissions);
|
|
|
728 |
virtual TZonePageType PageType();
|
|
|
729 |
public:
|
|
|
730 |
/**
|
|
|
731 |
The single instance of this manager class.
|
|
|
732 |
*/
|
|
|
733 |
static DMovableMemoryManager TheManager;
|
|
|
734 |
};
|
|
|
735 |
|
|
|
736 |
|
|
|
737 |
DMovableMemoryManager DMovableMemoryManager::TheManager;
|
|
|
738 |
DMemoryManager* TheMovableMemoryManager = &DMovableMemoryManager::TheManager;
|
|
|
739 |
|
|
|
740 |
|
|
|
741 |
TInt DMovableMemoryManager::MovePage( DMemoryObject* aMemory, SPageInfo* aOldPageInfo,
|
|
|
742 |
TPhysAddr& aNewPage, TUint aBlockZoneId, TBool aBlockRest)
|
|
|
743 |
{
|
|
|
744 |
__NK_ASSERT_DEBUG(RamAllocLock::IsHeld());
|
|
|
745 |
|
|
|
746 |
// Allocate the new page to move to, ensuring that we use the page type of the
|
|
|
747 |
// manager assigned to this page.
|
|
|
748 |
TPhysAddr newPage;
|
|
|
749 |
Mmu& m = TheMmu;
|
|
|
750 |
TInt r = m.AllocRam(&newPage, 1, aMemory->RamAllocFlags(), aMemory->iManager->PageType(),
|
|
|
751 |
aBlockZoneId, aBlockRest);
|
|
|
752 |
if (r != KErrNone)
|
|
|
753 |
{// Failed to allocate a new page to move the page to so can't continue.
|
|
|
754 |
return r;
|
|
|
755 |
}
|
|
|
756 |
|
|
|
757 |
r = KErrInUse;
|
|
|
758 |
MmuLock::Lock();
|
|
|
759 |
|
|
|
760 |
TUint index = aOldPageInfo->Index();
|
|
|
761 |
TRACE( ("DMovableMemoryManager::MovePage(0x%08x,0x%08x,?,0x%08x,%d) index=0x%x",
|
|
|
762 |
aMemory,aOldPageInfo,aBlockZoneId,aBlockRest,index));
|
|
|
763 |
__NK_ASSERT_DEBUG(aMemory==aOldPageInfo->Owner());
|
|
|
764 |
|
|
|
765 |
// Mark the page as being moved and get a pointer to the page array entry.
|
|
|
766 |
RPageArray::TIter pageIter;
|
|
|
767 |
TPhysAddr* const movingPageArrayPtr = aMemory->iPages.MovePageStart(index, pageIter);
|
|
|
768 |
if (!movingPageArrayPtr)
|
|
|
769 |
{// Can't move the page another operation is being performed on it.
|
|
|
770 |
MmuLock::Unlock();
|
|
|
771 |
TheMmu.FreeRam(&newPage, 1, aMemory->iManager->PageType());
|
|
|
772 |
return r;
|
|
|
773 |
}
|
|
|
774 |
__NK_ASSERT_DEBUG(RPageArray::IsPresent(*movingPageArrayPtr));
|
|
|
775 |
TPhysAddr oldPageEntry = *movingPageArrayPtr;
|
|
|
776 |
TPhysAddr oldPage = oldPageEntry & ~KPageMask;
|
|
|
777 |
#ifdef _DEBUG
|
|
|
778 |
if (oldPage != aOldPageInfo->PhysAddr())
|
|
|
779 |
{// The address of page array entry and the page info should match except
|
|
|
780 |
// when the page is being shadowed.
|
|
|
781 |
__NK_ASSERT_DEBUG(SPageInfo::FromPhysAddr(oldPage)->Type() == SPageInfo::EShadow);
|
|
|
782 |
}
|
|
|
783 |
#endif
|
|
|
784 |
__NK_ASSERT_DEBUG((newPage & KPageMask) == 0);
|
|
|
785 |
__NK_ASSERT_DEBUG(newPage != oldPage);
|
|
|
786 |
|
|
|
787 |
// Set the modifier so we can detect if the page state is updated.
|
|
|
788 |
aOldPageInfo->SetModifier(&pageIter);
|
|
|
789 |
|
|
|
790 |
// Restrict the page ready for moving.
|
|
|
791 |
// Read only memory objects don't need to be restricted but we still need
|
|
|
792 |
// to discover any physically pinned mappings.
|
|
|
793 |
TBool pageRestrictedNA = !aMemory->IsReadOnly();
|
|
|
794 |
TRestrictPagesType restrictType = pageRestrictedNA ?
|
|
|
795 |
ERestrictPagesNoAccessForMoving :
|
|
|
796 |
ERestrictPagesForMovingFlag;
|
|
|
797 |
|
|
|
798 |
// This page's contents may be changed so restrict the page to no access
|
|
|
799 |
// so we can detect any access to it while we are moving it.
|
|
|
800 |
MmuLock::Unlock();
|
|
|
801 |
// This will clear the memory objects mapping added flag so we can detect any new mappings.
|
|
|
802 |
aMemory->RestrictPages(pageIter, restrictType);
|
|
|
803 |
|
|
|
804 |
const TUint KOldMappingSlot = 0;
|
|
|
805 |
const TUint KNewMappingSlot = 1;
|
|
|
806 |
const TAny* tmpPtrOld = NULL;
|
|
|
807 |
TAny* tmpPtrNew;
|
|
|
808 |
// Verify that page restricting wasn't interrupted, if it was then the page
|
|
|
809 |
// can't be moved so remap it.
|
|
|
810 |
// If the page array entry (*movingPageArrayPtr) has been modified then a pinning
|
|
|
811 |
// veto'd the preparation.
|
|
|
812 |
MmuLock::Lock();
|
|
|
813 |
if (aOldPageInfo->CheckModified(&pageIter) || oldPageEntry != *movingPageArrayPtr)
|
|
|
814 |
{// Page is pinned or has been modified by another operation.
|
|
|
815 |
MmuLock::Unlock();
|
|
|
816 |
TheMmu.FreeRam(&newPage, 1, aMemory->iManager->PageType());
|
|
|
817 |
goto remap;
|
|
|
818 |
}
|
|
|
819 |
|
|
|
820 |
MmuLock::Unlock();
|
|
|
821 |
// Copy the contents of the page using some temporary mappings.
|
|
|
822 |
tmpPtrOld = (TAny*)TheMmu.MapTemp(oldPage, index, KOldMappingSlot);
|
|
|
823 |
tmpPtrNew = (TAny*)TheMmu.MapTemp(newPage, index, KNewMappingSlot);
|
|
|
824 |
pagecpy(tmpPtrNew, tmpPtrOld);
|
|
|
825 |
|
|
|
826 |
// Unmap and perform cache maintenance if the memory object is executable.
|
|
|
827 |
// Must do cache maintenance before we add any new mappings to the new page
|
|
|
828 |
// to ensure that any old instruction cache entries for the new page aren't
|
|
|
829 |
// picked up by any remapped executable mappings.
|
|
|
830 |
if (aMemory->IsExecutable())
|
|
|
831 |
CacheMaintenance::CodeChanged((TLinAddr)tmpPtrNew, KPageSize);
|
|
|
832 |
TheMmu.UnmapTemp(KNewMappingSlot);
|
|
|
833 |
#ifndef _DEBUG
|
|
|
834 |
TheMmu.UnmapTemp(KOldMappingSlot);
|
|
|
835 |
#endif
|
|
|
836 |
|
|
|
837 |
MmuLock::Lock();
|
|
|
838 |
if (!aOldPageInfo->CheckModified(&pageIter) && oldPageEntry == *movingPageArrayPtr &&
|
|
|
839 |
!aMemory->MappingAddedFlag())
|
|
|
840 |
{
|
|
|
841 |
// The page has been copied without anyone modifying it so set the page
|
|
|
842 |
// array entry to new physical address and map the page.
|
|
|
843 |
RPageArray::PageMoveNewAddr(*movingPageArrayPtr, newPage);
|
|
|
844 |
|
|
|
845 |
// Copy across the page info data from the old page to the new.
|
|
|
846 |
SPageInfo& newPageInfo = *SPageInfo::FromPhysAddr(newPage);
|
|
|
847 |
newPageInfo = *aOldPageInfo;
|
|
|
848 |
if (aMemory->IsDemandPaged())
|
|
|
849 |
{// Let the pager deal with the live list links for this page if required.
|
|
|
850 |
ThePager.ReplacePage(*aOldPageInfo, newPageInfo);
|
|
|
851 |
}
|
|
|
852 |
|
|
|
853 |
MmuLock::Unlock();
|
|
|
854 |
r = KErrNone;
|
|
|
855 |
aNewPage = newPage;
|
|
|
856 |
}
|
|
|
857 |
else
|
|
|
858 |
{
|
|
|
859 |
MmuLock::Unlock();
|
|
|
860 |
TheMmu.FreeRam(&newPage, 1, aMemory->iManager->PageType());
|
|
|
861 |
}
|
|
|
862 |
remap:
|
|
|
863 |
// Remap all mappings to the new physical address if the move was successful or
|
|
|
864 |
// back to the old page if the move failed.
|
|
|
865 |
// Invalidate the TLB for the page if old mappings still exist or new
|
|
|
866 |
// mappings were added but will be removed as the page can't be moved.
|
|
|
867 |
TBool invalidateTLB = !pageRestrictedNA || r != KErrNone;
|
|
|
868 |
aMemory->RemapPage(*movingPageArrayPtr, index, invalidateTLB);
|
|
|
869 |
|
|
|
870 |
if (r == KErrNone)
|
|
|
871 |
{// Must wait until here as read only memory objects' mappings aren't
|
|
|
872 |
// all guaranteed to point to the new page until after RemapPage().
|
|
|
873 |
TheMmu.FreeRam(&oldPage, 1, aMemory->iManager->PageType());
|
|
|
874 |
#ifdef _DEBUG
|
|
|
875 |
// For testing purposes clear the old page to help detect any
|
|
|
876 |
// erroneous mappings to the old page.
|
|
|
877 |
memclr((TAny*)tmpPtrOld, KPageSize);
|
|
|
878 |
}
|
|
|
879 |
TheMmu.UnmapTemp(KOldMappingSlot); // Will invalidate the TLB entry for the mapping.
|
|
|
880 |
#else
|
|
|
881 |
}
|
|
|
882 |
#endif
|
|
|
883 |
// indicate we've stopped moving memory now...
|
|
|
884 |
MmuLock::Lock();
|
|
|
885 |
RPageArray::MovePageEnd(*movingPageArrayPtr);
|
|
|
886 |
MmuLock::Unlock();
|
|
|
887 |
|
|
|
888 |
return r;
|
|
|
889 |
}
|
|
|
890 |
|
|
|
891 |
|
|
|
892 |
TInt DMovableMemoryManager::HandleFault(DMemoryObject* aMemory, TUint aIndex, DMemoryMapping* aMapping,
|
|
|
893 |
TUint aMapInstanceCount, TUint aAccessPermissions)
|
|
|
894 |
{
|
|
|
895 |
TInt r = KErrNotFound;
|
|
|
896 |
SPageInfo* pageInfo;
|
|
|
897 |
MmuLock::Lock();
|
|
|
898 |
__UNLOCK_GUARD_START(MmuLock);
|
|
|
899 |
TPhysAddr* const pageEntry = aMemory->iPages.PageEntry(aIndex);
|
|
|
900 |
if (!pageEntry || !RPageArray::IsPresent(*pageEntry) ||
|
|
|
901 |
aMapInstanceCount != aMapping->MapInstanceCount() || aMapping->BeingDetached())
|
|
|
902 |
{// The page isn't present or has been unmapped so invalid access.
|
|
|
903 |
goto exit;
|
|
|
904 |
}
|
|
|
905 |
|
|
|
906 |
if (aMapping->MovingPageIn(*pageEntry, aIndex))
|
|
|
907 |
{// The page was has been paged in as it was still mapped.
|
|
|
908 |
pageInfo = SPageInfo::FromPhysAddr(*pageEntry & ~KPageMask);
|
|
|
909 |
pageInfo->SetModifier(0); // Signal to MovePage() that the page has been paged in.
|
|
|
910 |
r = KErrNone;
|
|
|
911 |
}
|
|
|
912 |
|
|
|
913 |
exit:
|
|
|
914 |
__UNLOCK_GUARD_END(MmuLock);
|
|
|
915 |
MmuLock::Unlock();
|
|
|
916 |
return r;
|
|
|
917 |
}
|
|
|
918 |
|
|
|
919 |
|
|
|
920 |
TZonePageType DMovableMemoryManager::PageType()
|
|
|
921 |
{// Movable memory object pages are movable.
|
|
|
922 |
return EPageMovable;
|
|
|
923 |
}
|
|
|
924 |
|
|
|
925 |
|
|
|
926 |
/**
|
|
|
927 |
Manager for memory objects containing normal unpaged RAM, which
|
|
|
928 |
as well as being 'movable', like #DMovableMemoryManager,
|
|
|
929 |
may also have regions marked as 'discardable'. Discardable pages may be
|
|
|
930 |
reclaimed (removed) by the system at any time; this state is controlled using
|
|
|
931 |
the functions #AllowDiscard and #DisallowDiscard.
|
|
|
932 |
<P>
|
|
|
933 |
This is used for the memory containing file system caches. Discardable memory
|
|
|
934 |
is managed using similar
|
|
|
935 |
*/
|
|
|
936 |
class DDiscardableMemoryManager : public DMovableMemoryManager
|
|
|
937 |
{
|
|
|
938 |
public:
|
|
|
939 |
// from DMemoryManager...
|
|
|
940 |
virtual TInt AllowDiscard(DMemoryObject* aMemory, TUint aIndex, TUint aCount);
|
|
|
941 |
virtual TInt DisallowDiscard(DMemoryObject* aMemory, TUint aIndex, TUint aCount);
|
|
|
942 |
virtual TInt StealPage(DMemoryObject* aMemory, SPageInfo* aPageInfo);
|
|
|
943 |
virtual TInt RestrictPage(DMemoryObject* aMemory, SPageInfo* aPageInfo, TRestrictPagesType aRestriction);
|
|
|
944 |
virtual TZonePageType PageType();
|
|
|
945 |
public:
|
|
|
946 |
/**
|
|
|
947 |
The single instance of this manager class.
|
|
|
948 |
*/
|
|
|
949 |
static DDiscardableMemoryManager TheManager;
|
|
|
950 |
};
|
|
|
951 |
|
|
|
952 |
|
|
|
953 |
DDiscardableMemoryManager DDiscardableMemoryManager::TheManager;
|
|
|
954 |
DMemoryManager* TheDiscardableMemoryManager = &DDiscardableMemoryManager::TheManager;
|
|
|
955 |
|
|
|
956 |
|
|
|
957 |
TInt DDiscardableMemoryManager::AllowDiscard(DMemoryObject* aMemory, TUint aIndex, TUint aCount)
|
|
|
958 |
{
|
|
|
959 |
TRACE2(("DDiscardableMemoryManager::AllowDiscard(0x%08x,0x%x,0x%x)",aMemory, aIndex, aCount));
|
|
|
960 |
__NK_ASSERT_DEBUG(MemoryObjectLock::IsHeld(aMemory));
|
|
|
961 |
|
|
|
962 |
// make iterator for region...
|
|
|
963 |
RPageArray::TIter pageIter;
|
|
|
964 |
aMemory->iPages.FindStart(aIndex,aCount,pageIter);
|
|
|
965 |
|
|
|
966 |
for(;;)
|
|
|
967 |
{
|
|
|
968 |
// find some pages...
|
|
|
969 |
RPageArray::TIter pageList;
|
|
|
970 |
TUint nFound = pageIter.Find(pageList);
|
|
|
971 |
if(!nFound)
|
|
|
972 |
break;
|
|
|
973 |
|
|
|
974 |
// donate pages...
|
|
|
975 |
TUint n;
|
|
|
976 |
TPhysAddr* pages;
|
|
|
977 |
while((n=pageList.Pages(pages,KMaxPagesInOneGo))!=0)
|
|
|
978 |
{
|
|
|
979 |
pageList.Skip(n);
|
|
|
980 |
ThePager.DonatePages(n,pages);
|
|
|
981 |
}
|
|
|
982 |
|
|
|
983 |
// move on...
|
|
|
984 |
pageIter.FindRelease(nFound);
|
|
|
985 |
}
|
|
|
986 |
|
|
|
987 |
// done...
|
|
|
988 |
aMemory->iPages.FindEnd(aIndex,aCount);
|
|
|
989 |
|
|
|
990 |
return KErrNone;
|
|
|
991 |
}
|
|
|
992 |
|
|
|
993 |
|
|
|
994 |
TInt DDiscardableMemoryManager::DisallowDiscard(DMemoryObject* aMemory, TUint aIndex, TUint aCount)
|
|
|
995 |
{
|
|
|
996 |
TRACE2(("DDiscardableMemoryManager::DisallowDiscard(0x%08x,0x%x,0x%x)",aMemory, aIndex, aCount));
|
|
|
997 |
__NK_ASSERT_DEBUG(MemoryObjectLock::IsHeld(aMemory));
|
|
|
998 |
|
|
|
999 |
TInt r = KErrNone;
|
|
|
1000 |
|
|
|
1001 |
// get pages...
|
|
|
1002 |
RPageArray::TIter pageIter;
|
|
|
1003 |
aMemory->iPages.FindStart(aIndex,aCount,pageIter);
|
|
|
1004 |
|
|
|
1005 |
RPageArray::TIter pageList;
|
|
|
1006 |
TUint numPages = pageIter.Find(pageList);
|
|
|
1007 |
|
|
|
1008 |
if(numPages!=aCount)
|
|
|
1009 |
{
|
|
|
1010 |
// not all pages are present...
|
|
|
1011 |
r = KErrNotFound;
|
|
|
1012 |
}
|
|
|
1013 |
else
|
|
|
1014 |
{
|
|
|
1015 |
TUint n;
|
|
|
1016 |
TPhysAddr* pages;
|
|
|
1017 |
while((n=pageList.Pages(pages,KMaxPagesInOneGo))!=0)
|
|
|
1018 |
{
|
|
|
1019 |
pageList.Skip(n);
|
|
|
1020 |
r = ThePager.ReclaimPages(n,pages);
|
|
|
1021 |
if(r!=KErrNone)
|
|
|
1022 |
break;
|
|
|
1023 |
}
|
|
|
1024 |
}
|
|
|
1025 |
|
|
|
1026 |
// done with pages...
|
|
|
1027 |
if(numPages)
|
|
|
1028 |
pageIter.FindRelease(numPages);
|
|
|
1029 |
aMemory->iPages.FindEnd(aIndex,aCount);
|
|
|
1030 |
|
|
|
1031 |
return r;
|
|
|
1032 |
}
|
|
|
1033 |
|
|
|
1034 |
|
|
|
1035 |
TInt DDiscardableMemoryManager::StealPage(DMemoryObject* aMemory, SPageInfo* aPageInfo)
|
|
|
1036 |
{
|
|
|
1037 |
TRACE2(("DDiscardableMemoryManager::StealPage(0x%08x,0x%08x)",aMemory,aPageInfo));
|
|
|
1038 |
__NK_ASSERT_DEBUG(RamAllocLock::IsHeld());
|
|
|
1039 |
__NK_ASSERT_DEBUG(MmuLock::IsHeld());
|
|
|
1040 |
__UNLOCK_GUARD_START(MmuLock);
|
|
|
1041 |
|
|
|
1042 |
TUint index = aPageInfo->Index();
|
|
|
1043 |
TInt r;
|
|
|
1044 |
|
|
|
1045 |
RPageArray::TIter pageList;
|
|
|
1046 |
TPhysAddr* p = aMemory->iPages.StealPageStart(index,pageList);
|
|
|
1047 |
__NK_ASSERT_DEBUG((*p&~KPageMask)==aPageInfo->PhysAddr()); // object should have our page
|
|
|
1048 |
|
|
|
1049 |
aPageInfo->SetModifier(&pageList);
|
|
|
1050 |
|
|
|
1051 |
__UNLOCK_GUARD_END(MmuLock);
|
|
|
1052 |
MmuLock::Unlock();
|
|
|
1053 |
|
|
|
1054 |
// unmap the page...
|
|
|
1055 |
aMemory->UnmapPages(pageList,false);
|
|
|
1056 |
|
|
|
1057 |
MmuLock::Lock();
|
|
|
1058 |
|
|
|
1059 |
__NK_ASSERT_DEBUG((*p&~KPageMask)==aPageInfo->PhysAddr()); // object should still have our page because freeing a page requires the RamAllocLock, which we hold
|
|
|
1060 |
|
|
|
1061 |
if(aPageInfo->CheckModified(&pageList))
|
|
|
1062 |
{
|
|
|
1063 |
// page state was changed, this can only happen if a page fault put this page
|
|
|
1064 |
// back into the committed state or if the page was pinned.
|
|
|
1065 |
// From either of these states it's possible to subsequently change
|
|
|
1066 |
// to any other state or use (so we can't assert anything here).
|
|
|
1067 |
r = KErrInUse;
|
|
|
1068 |
}
|
|
|
1069 |
else
|
|
|
1070 |
{
|
|
|
1071 |
// nobody else has modified page state, so we can...
|
|
|
1072 |
TPhysAddr page = *p;
|
|
|
1073 |
__NK_ASSERT_DEBUG(RPageArray::TargetStateIsDecommitted(page));
|
|
|
1074 |
if(page&RPageArray::EUnmapVetoed)
|
|
|
1075 |
{
|
|
|
1076 |
// operation was vetoed, which means page had a pinned mapping but the pin
|
|
|
1077 |
// operation hadn't got around to removing the page from the live list,
|
|
|
1078 |
// we need to restore correct state...
|
|
|
1079 |
if(RPageArray::State(page)==RPageArray::EStealing)
|
|
|
1080 |
*p = (page&~(RPageArray::EStateMask|RPageArray::EUnmapVetoed))|RPageArray::ECommitted;
|
|
|
1081 |
// else
|
|
|
1082 |
// leave page in state it was before we attempted to steal it
|
|
|
1083 |
|
|
|
1084 |
// put page back on live list so it doesn't get lost.
|
|
|
1085 |
// We put it at the start as if it were recently accessed because being pinned
|
|
|
1086 |
// counts as an access and we can't put it anywhere else otherwise when
|
|
|
1087 |
// page stealing retries it may get this same page again, potentially causing
|
|
|
1088 |
// deadlock.
|
|
|
1089 |
__NK_ASSERT_DEBUG(aPageInfo->PagedState()==SPageInfo::EUnpaged); // no one else has changed page since we removed it in DPager::StealPage
|
|
|
1090 |
ThePager.PagedIn(aPageInfo);
|
|
|
1091 |
|
|
|
1092 |
r = KErrInUse;
|
|
|
1093 |
}
|
|
|
1094 |
else
|
|
|
1095 |
{
|
|
|
1096 |
// page successfully unmapped...
|
|
|
1097 |
aPageInfo->SetReadOnly(); // page not mapped, so must be read-only
|
|
|
1098 |
|
|
|
1099 |
// if the page can be made clean...
|
|
|
1100 |
r = aMemory->iManager->CleanPage(aMemory,aPageInfo,p);
|
|
|
1101 |
|
|
|
1102 |
if(r==KErrNone)
|
|
|
1103 |
{
|
|
|
1104 |
// page successfully stolen...
|
|
|
1105 |
__NK_ASSERT_DEBUG((*p^page)<(TUint)KPageSize); // sanity check, page should still be allocated to us
|
|
|
1106 |
__NK_ASSERT_DEBUG(aPageInfo->IsDirty()==false);
|
|
|
1107 |
__NK_ASSERT_DEBUG(aPageInfo->IsWritable()==false);
|
|
|
1108 |
|
|
|
1109 |
TPhysAddr pagerInfo = aPageInfo->PagingManagerData();
|
|
|
1110 |
*p = pagerInfo;
|
|
|
1111 |
__NK_ASSERT_ALWAYS((pagerInfo&(RPageArray::EFlagsMask|RPageArray::EStateMask)) == RPageArray::ENotPresent);
|
|
|
1112 |
|
|
|
1113 |
TheMmu.PageFreed(aPageInfo);
|
|
|
1114 |
}
|
|
|
1115 |
else
|
|
|
1116 |
{
|
|
|
1117 |
// only legitimate reason for failing the clean is if the page state was changed
|
|
|
1118 |
// by a page fault or by pinning, this should return KErrInUse...
|
|
|
1119 |
__NK_ASSERT_DEBUG(r==KErrInUse);
|
|
|
1120 |
}
|
|
|
1121 |
}
|
|
|
1122 |
}
|
|
|
1123 |
|
|
|
1124 |
aMemory->iPages.StealPageEnd(index,r==KErrNone ? 1 : 0);
|
|
|
1125 |
|
|
|
1126 |
#ifdef _DEBUG
|
|
|
1127 |
if(r!=KErrNone)
|
|
|
1128 |
TRACE2(("DDiscardableMemoryManager::StealPage fail because preempted"));
|
|
|
1129 |
#endif
|
|
|
1130 |
|
|
|
1131 |
TRACE2(("DDiscardableMemoryManager::StealPage returns %d",r));
|
|
|
1132 |
return r;
|
|
|
1133 |
}
|
|
|
1134 |
|
|
|
1135 |
|
|
|
1136 |
TInt DDiscardableMemoryManager::RestrictPage(DMemoryObject* aMemory, SPageInfo* aPageInfo, TRestrictPagesType aRestriction)
|
|
|
1137 |
{
|
|
|
1138 |
if(aRestriction==ERestrictPagesNoAccessForOldPage)
|
|
|
1139 |
{
|
|
|
1140 |
// Lie to pager when it sets an old page inaccessible as we don't want to rejunvanate
|
|
|
1141 |
// the page if it is accessed as RChunk::Lock() should be used to remove the page from
|
|
|
1142 |
// the live list before accessing the page.
|
|
|
1143 |
return KErrNone;
|
|
|
1144 |
}
|
|
|
1145 |
return DMovableMemoryManager::RestrictPage(aMemory, aPageInfo, aRestriction);
|
|
|
1146 |
}
|
|
|
1147 |
|
|
|
1148 |
|
|
|
1149 |
TZonePageType DDiscardableMemoryManager::PageType()
|
|
|
1150 |
{// Discardable memory objects page are movable unless they are donated to the pager.
|
|
|
1151 |
return EPageMovable;
|
|
|
1152 |
}
|
|
|
1153 |
|
|
|
1154 |
|
|
|
1155 |
|
|
|
1156 |
/**
|
|
|
1157 |
Manager for memory objects containing memory mapped hardware devices or special
|
|
|
1158 |
purpose memory for which the physical addresses are fixed.
|
|
|
1159 |
*/
|
|
|
1160 |
class DHardwareMemoryManager : public DMemoryManager
|
|
|
1161 |
{
|
|
|
1162 |
public:
|
|
|
1163 |
// from DMemoryManager...
|
|
|
1164 |
virtual void Destruct(DMemoryObject* aMemory);
|
|
|
1165 |
virtual TInt AddPages(DMemoryObject* aMemory, TUint aIndex, TUint aCount, TPhysAddr* aPages);
|
|
|
1166 |
virtual TInt AddContiguous(DMemoryObject* aMemory, TUint aIndex, TUint aCount, TPhysAddr aPhysAddr);
|
|
|
1167 |
virtual TInt RemovePages(DMemoryObject* aMemory, TUint aIndex, TUint aCount, TPhysAddr* aPages);
|
|
|
1168 |
virtual TInt Pin(DMemoryObject* aMemory, DMemoryMappingBase* aMapping, TPinArgs& aPinArgs);
|
|
|
1169 |
virtual void Unpin(DMemoryObject* aMemory, DMemoryMappingBase* aMapping, TPinArgs& aPinArgs);
|
|
|
1170 |
|
|
|
1171 |
private:
|
|
|
1172 |
/**
|
|
|
1173 |
Update the page information structure for RAM added with #AddPages and #AddContiguous.
|
|
|
1174 |
|
|
|
1175 |
This performs debug checks to ensure that any physical memory which is added to more than
|
|
|
1176 |
one memory object meets with the restriction imposed by the MMU and cache hardware.
|
|
|
1177 |
It also verifies that the RAM pages are of type SPageInfo::EPhysAlloc,
|
|
|
1178 |
i.e. were allocated with Epoc::AllocPhysicalRam or similar.
|
|
|
1179 |
|
|
|
1180 |
This is only used when the physical addresses of the page being added to a memory
|
|
|
1181 |
object corresponds to RAM being managed by the kernel, i.e. physical addresses
|
|
|
1182 |
with an associated #SPageInfo structure.
|
|
|
1183 |
|
|
|
1184 |
@param aMemory A memory object associated with this manager.
|
|
|
1185 |
@param aIndex Page index, within the memory, for the page.
|
|
|
1186 |
@param aPageInfo The page information structure of the RAM page.
|
|
|
1187 |
|
|
|
1188 |
@pre #MmuLock held.
|
|
|
1189 |
@post #MmuLock held.
|
|
|
1190 |
*/
|
|
|
1191 |
static void AssignPage(DMemoryObject* aMemory, TUint aIndex, SPageInfo* aPageInfo);
|
|
|
1192 |
|
|
|
1193 |
/**
|
|
|
1194 |
Update the page information structure for RAM removed with #RemovePages.
|
|
|
1195 |
|
|
|
1196 |
This is only used when the physical addresses of the page being removed from a memory
|
|
|
1197 |
object corresponds to RAM being managed by the kernel, i.e. physical addresses
|
|
|
1198 |
with an associated #SPageInfo structure.
|
|
|
1199 |
|
|
|
1200 |
@param aMemory A memory object associated with this manager.
|
|
|
1201 |
@param aIndex Page index, within the memory, for the page.
|
|
|
1202 |
@param aPageInfo The page information structure of the RAM page.
|
|
|
1203 |
|
|
|
1204 |
@pre #MmuLock held.
|
|
|
1205 |
@post #MmuLock held.
|
|
|
1206 |
*/
|
|
|
1207 |
static void UnassignPage(DMemoryObject* aMemory, TUint aIndex, SPageInfo* aPageInfo);
|
|
|
1208 |
|
|
|
1209 |
public:
|
|
|
1210 |
/**
|
|
|
1211 |
The single instance of this manager class.
|
|
|
1212 |
*/
|
|
|
1213 |
static DHardwareMemoryManager TheManager;
|
|
|
1214 |
};
|
|
|
1215 |
|
|
|
1216 |
|
|
|
1217 |
DHardwareMemoryManager DHardwareMemoryManager::TheManager;
|
|
|
1218 |
DMemoryManager* TheHardwareMemoryManager = &DHardwareMemoryManager::TheManager;
|
|
|
1219 |
|
|
|
1220 |
|
|
|
1221 |
void DHardwareMemoryManager::Destruct(DMemoryObject* aMemory)
|
|
|
1222 |
{
|
|
|
1223 |
MemoryObjectLock::Lock(aMemory);
|
|
|
1224 |
RemovePages(aMemory,0,aMemory->iSizeInPages,0);
|
|
|
1225 |
MemoryObjectLock::Unlock(aMemory);
|
|
|
1226 |
aMemory->Close();
|
|
|
1227 |
}
|
|
|
1228 |
|
|
|
1229 |
|
|
|
1230 |
TInt DHardwareMemoryManager::AddPages(DMemoryObject* aMemory, TUint aIndex, TUint aCount, TPhysAddr* aPages)
|
|
|
1231 |
{
|
|
|
1232 |
TRACE2(("DHardwareMemoryManager::AddPages(0x%08x,0x%x,0x%x,?)",aMemory, aIndex, aCount));
|
|
|
1233 |
__NK_ASSERT_DEBUG(MemoryObjectLock::IsHeld(aMemory));
|
|
|
1234 |
|
|
|
1235 |
// validate arguments...
|
|
|
1236 |
TPhysAddr* pages = aPages;
|
|
|
1237 |
TPhysAddr* pagesEnd = aPages+aCount;
|
|
|
1238 |
TPhysAddr checkMask = 0;
|
|
|
1239 |
do checkMask |= *pages++;
|
|
|
1240 |
while(pages<pagesEnd);
|
|
|
1241 |
if(checkMask&KPageMask)
|
|
|
1242 |
return KErrArgument;
|
|
|
1243 |
|
|
|
1244 |
// check and allocate page array entries...
|
|
|
1245 |
RPageArray::TIter pageIter;
|
|
|
1246 |
TInt r = aMemory->iPages.AddStart(aIndex,aCount,pageIter);
|
|
|
1247 |
if(r!=KErrNone)
|
|
|
1248 |
return r;
|
|
|
1249 |
|
|
|
1250 |
// assign pages...
|
|
|
1251 |
pages = aPages;
|
|
|
1252 |
TUint index = aIndex;
|
|
|
1253 |
TUint flash = 0;
|
|
|
1254 |
MmuLock::Lock();
|
|
|
1255 |
do
|
|
|
1256 |
{
|
|
|
1257 |
MmuLock::Flash(flash,KMaxPageInfoUpdatesInOneGo/2); // flash twice as often because we're doing about twice the work as a simple page info update
|
|
|
1258 |
TPhysAddr pagePhys = *pages++;
|
|
|
1259 |
SPageInfo* pi = SPageInfo::SafeFromPhysAddr(pagePhys);
|
|
|
1260 |
if(pi)
|
|
|
1261 |
AssignPage(aMemory,index,pi);
|
|
|
1262 |
++index;
|
|
|
1263 |
}
|
|
|
1264 |
while(pages<pagesEnd);
|
|
|
1265 |
MmuLock::Unlock();
|
|
|
1266 |
|
|
|
1267 |
// map the pages...
|
|
|
1268 |
RPageArray::TIter pageList = pageIter;
|
|
|
1269 |
pageIter.Add(aCount,aPages);
|
|
|
1270 |
r = aMemory->MapPages(pageList);
|
|
|
1271 |
|
|
|
1272 |
// release page array entries...
|
|
|
1273 |
aMemory->iPages.AddEnd(aIndex,aCount);
|
|
|
1274 |
|
|
|
1275 |
// revert if error...
|
|
|
1276 |
if(r!=KErrNone)
|
|
|
1277 |
RemovePages(aMemory,aIndex,aCount,0);
|
|
|
1278 |
|
|
|
1279 |
return r;
|
|
|
1280 |
}
|
|
|
1281 |
|
|
|
1282 |
|
|
|
1283 |
TInt DHardwareMemoryManager::AddContiguous(DMemoryObject* aMemory, TUint aIndex, TUint aCount, TPhysAddr aPhysAddr)
|
|
|
1284 |
{
|
|
|
1285 |
TRACE2(("DHardwareMemoryManager::AddContiguous(0x%08x,0x%x,0x%x,0x%08x)",aMemory, aIndex, aCount, aPhysAddr));
|
|
|
1286 |
__NK_ASSERT_DEBUG(MemoryObjectLock::IsHeld(aMemory));
|
|
|
1287 |
|
|
|
1288 |
// validate arguments...
|
|
|
1289 |
if(aPhysAddr&KPageMask)
|
|
|
1290 |
return KErrArgument;
|
|
|
1291 |
|
|
|
1292 |
// check and allocate page array entries...
|
|
|
1293 |
RPageArray::TIter pageIter;
|
|
|
1294 |
TInt r = aMemory->iPages.AddStart(aIndex,aCount,pageIter);
|
|
|
1295 |
if(r!=KErrNone)
|
|
|
1296 |
return r;
|
|
|
1297 |
|
|
|
1298 |
RPageArray::TIter pageList = pageIter;
|
|
|
1299 |
|
|
|
1300 |
// assign pages...
|
|
|
1301 |
SPageInfo* piStart = SPageInfo::SafeFromPhysAddr(aPhysAddr);
|
|
|
1302 |
SPageInfo* piEnd = piStart+aCount;
|
|
|
1303 |
if(piStart)
|
|
|
1304 |
{
|
|
|
1305 |
SPageInfo* pi = piStart;
|
|
|
1306 |
TUint index = aIndex;
|
|
|
1307 |
TUint flash = 0;
|
|
|
1308 |
MmuLock::Lock();
|
|
|
1309 |
while(pi<piEnd)
|
|
|
1310 |
{
|
|
|
1311 |
MmuLock::Flash(flash,KMaxPageInfoUpdatesInOneGo/2); // flash twice as often because we're doing about twice the work as a simple page info update
|
|
|
1312 |
AssignPage(aMemory,index,pi);
|
|
|
1313 |
++index;
|
|
|
1314 |
++pi;
|
|
|
1315 |
}
|
|
|
1316 |
MmuLock::Unlock();
|
|
|
1317 |
}
|
|
|
1318 |
|
|
|
1319 |
// map the pages...
|
|
|
1320 |
pageIter.AddContiguous(aCount,aPhysAddr);
|
|
|
1321 |
r = aMemory->MapPages(pageList);
|
|
|
1322 |
|
|
|
1323 |
// release page array entries...
|
|
|
1324 |
aMemory->iPages.AddEnd(aIndex,aCount);
|
|
|
1325 |
|
|
|
1326 |
// revert if error...
|
|
|
1327 |
if(r!=KErrNone)
|
|
|
1328 |
RemovePages(aMemory,aIndex,aCount,0);
|
|
|
1329 |
|
|
|
1330 |
return r;
|
|
|
1331 |
}
|
|
|
1332 |
|
|
|
1333 |
|
|
|
1334 |
TInt DHardwareMemoryManager::RemovePages(DMemoryObject* aMemory, TUint aIndex, TUint aCount, TPhysAddr* aPages)
|
|
|
1335 |
{
|
|
|
1336 |
TRACE2(("DHardwareMemoryManager::RemovePages(0x%08x,0x%x,0x%x,?)",aMemory, aIndex, aCount));
|
|
|
1337 |
__NK_ASSERT_DEBUG(MemoryObjectLock::IsHeld(aMemory));
|
|
|
1338 |
|
|
|
1339 |
RPageArray::TIter pageIter;
|
|
|
1340 |
aMemory->iPages.FindStart(aIndex,aCount,pageIter);
|
|
|
1341 |
|
|
|
1342 |
TUint numPages = 0;
|
|
|
1343 |
for(;;)
|
|
|
1344 |
{
|
|
|
1345 |
// find some pages...
|
|
|
1346 |
RPageArray::TIter pageList;
|
|
|
1347 |
TUint n = pageIter.RemoveFind(pageList);
|
|
|
1348 |
if(!n)
|
|
|
1349 |
break;
|
|
|
1350 |
|
|
|
1351 |
// unmap some pages...
|
|
|
1352 |
aMemory->UnmapPages(pageList,true);
|
|
|
1353 |
|
|
|
1354 |
// free pages...
|
|
|
1355 |
TPhysAddr pagePhys;
|
|
|
1356 |
while(pageList.Remove(1,&pagePhys))
|
|
|
1357 |
{
|
|
|
1358 |
if(aPages)
|
|
|
1359 |
*aPages++ = pagePhys;
|
|
|
1360 |
++numPages;
|
|
|
1361 |
|
|
|
1362 |
__NK_ASSERT_DEBUG((pagePhys&KPageMask)==0);
|
|
|
1363 |
|
|
|
1364 |
TUint index = pageList.Index()-1;
|
|
|
1365 |
SPageInfo* pi = SPageInfo::SafeFromPhysAddr(pagePhys);
|
|
|
1366 |
if(!pi)
|
|
|
1367 |
TheMmu.CleanAndInvalidatePages(&pagePhys,1,aMemory->Attributes(),index);
|
|
|
1368 |
else
|
|
|
1369 |
{
|
|
|
1370 |
MmuLock::Lock();
|
|
|
1371 |
UnassignPage(aMemory,index,pi);
|
|
|
1372 |
MmuLock::Unlock();
|
|
|
1373 |
}
|
|
|
1374 |
}
|
|
|
1375 |
|
|
|
1376 |
// move on...
|
|
|
1377 |
pageIter.FindRelease(n);
|
|
|
1378 |
}
|
|
|
1379 |
|
|
|
1380 |
aMemory->iPages.FindEnd(aIndex,aCount);
|
|
|
1381 |
|
|
|
1382 |
return numPages;
|
|
|
1383 |
}
|
|
|
1384 |
|
|
|
1385 |
|
|
|
1386 |
void DHardwareMemoryManager::AssignPage(DMemoryObject* aMemory, TUint aIndex, SPageInfo* aPageInfo)
|
|
|
1387 |
{
|
|
|
1388 |
TRACE2(("DHardwareMemoryManager::AssignPage(0x%08x,0x%x,phys=0x%08x)",aMemory, aIndex, aPageInfo->PhysAddr()));
|
|
|
1389 |
__NK_ASSERT_DEBUG(MmuLock::IsHeld());
|
|
|
1390 |
__NK_ASSERT_DEBUG(aPageInfo->Type()==SPageInfo::EPhysAlloc);
|
|
|
1391 |
TUint flags = aMemory->PageInfoFlags();
|
|
|
1392 |
if(aPageInfo->UseCount()==0)
|
|
|
1393 |
{
|
|
|
1394 |
// not mapped yet...
|
|
|
1395 |
aPageInfo->SetMapped(aIndex,flags);
|
|
|
1396 |
}
|
|
|
1397 |
else
|
|
|
1398 |
{
|
|
|
1399 |
// already mapped somewhere...
|
|
|
1400 |
TMemoryType type = (TMemoryType)(flags&KMemoryTypeMask);
|
|
|
1401 |
if(CacheMaintenance::IsCached(type))
|
|
|
1402 |
{
|
|
|
1403 |
// memory is cached at L1, check colour matches existing mapping...
|
|
|
1404 |
if( (aPageInfo->Index()^aIndex) & KPageColourMask )
|
|
|
1405 |
{
|
|
|
1406 |
#ifdef _DEBUG
|
|
|
1407 |
Kern::Printf("DHardwareMemoryManager::AssignPage BAD COLOUR");
|
|
|
1408 |
aPageInfo->Dump();
|
|
|
1409 |
#endif
|
|
|
1410 |
__NK_ASSERT_ALWAYS(0);
|
|
|
1411 |
}
|
|
|
1412 |
}
|
|
|
1413 |
// check memory type matches existing mapping...
|
|
|
1414 |
if( (aPageInfo->Flags()^flags) & EMemoryAttributeMask )
|
|
|
1415 |
{
|
|
|
1416 |
#ifdef _DEBUG
|
|
|
1417 |
Kern::Printf("DHardwareMemoryManager::AssignPage BAD MEMORY TYPE");
|
|
|
1418 |
aPageInfo->Dump();
|
|
|
1419 |
#endif
|
|
|
1420 |
__NK_ASSERT_ALWAYS(0);
|
|
|
1421 |
}
|
|
|
1422 |
}
|
|
|
1423 |
aPageInfo->IncUseCount();
|
|
|
1424 |
TRACE2(("DHardwareMemoryManager::AssignPage iUseCount=%d",aPageInfo->UseCount()));
|
|
|
1425 |
}
|
|
|
1426 |
|
|
|
1427 |
|
|
|
1428 |
void DHardwareMemoryManager::UnassignPage(DMemoryObject* aMemory, TUint aIndex, SPageInfo* aPageInfo)
|
|
|
1429 |
{
|
|
|
1430 |
TRACE2(("DHardwareMemoryManager::UnassignPage(0x%08x,0x%x,phys=0x%08x)",aMemory, aIndex, aPageInfo->PhysAddr()));
|
|
|
1431 |
__NK_ASSERT_DEBUG(MmuLock::IsHeld());
|
|
|
1432 |
TRACE2(("DHardwareMemoryManager::UnassignPage iUseCount=%d",aPageInfo->UseCount()));
|
|
|
1433 |
__NK_ASSERT_DEBUG(aPageInfo->UseCount());
|
|
|
1434 |
if(!aPageInfo->DecUseCount())
|
|
|
1435 |
{
|
|
|
1436 |
// page no longer being used by any memory object, make sure it's contents
|
|
|
1437 |
// are purged from the cache...
|
|
|
1438 |
TPhysAddr pagePhys = aPageInfo->PhysAddr();
|
|
|
1439 |
aPageInfo->SetModifier(&pagePhys);
|
|
|
1440 |
MmuLock::Unlock();
|
|
|
1441 |
TheMmu.CleanAndInvalidatePages(&pagePhys,1,aMemory->Attributes(),aIndex);
|
|
|
1442 |
MmuLock::Lock();
|
|
|
1443 |
if(!aPageInfo->CheckModified(&pagePhys)) // if page has not been reused...
|
|
|
1444 |
aPageInfo->SetUncached(); // we know the memory is not in the cache
|
|
|
1445 |
}
|
|
|
1446 |
}
|
|
|
1447 |
|
|
|
1448 |
|
|
|
1449 |
TInt DHardwareMemoryManager::Pin(DMemoryObject* aMemory, DMemoryMappingBase* aMapping, TPinArgs& aPinArgs)
|
|
|
1450 |
{
|
|
|
1451 |
return ((DUnpagedMemoryManager*)this)->DUnpagedMemoryManager::Pin(aMemory,aMapping,aPinArgs);
|
|
|
1452 |
}
|
|
|
1453 |
|
|
|
1454 |
|
|
|
1455 |
void DHardwareMemoryManager::Unpin(DMemoryObject* aMemory, DMemoryMappingBase* aMapping, TPinArgs& aPinArgs)
|
|
|
1456 |
{
|
|
|
1457 |
((DUnpagedMemoryManager*)this)->DUnpagedMemoryManager::Unpin(aMemory,aMapping,aPinArgs);
|
|
|
1458 |
}
|
|
|
1459 |
|
|
|
1460 |
|
|
|
1461 |
|
|
|
1462 |
//
|
|
|
1463 |
// DPagedMemoryManager
|
|
|
1464 |
//
|
|
|
1465 |
|
|
|
1466 |
TInt DPagedMemoryManager::New(DMemoryObject*& aMemory, TUint aSizeInPages, TMemoryAttributes aAttributes, TMemoryCreateFlags aCreateFlags)
|
|
|
1467 |
{
|
|
|
1468 |
return DMemoryManager::New(aMemory, aSizeInPages, aAttributes, (TMemoryCreateFlags)(aCreateFlags | EMemoryCreateDemandPaged));
|
|
|
1469 |
}
|
|
|
1470 |
|
|
|
1471 |
|
|
|
1472 |
void DPagedMemoryManager::Destruct(DMemoryObject* aMemory)
|
|
|
1473 |
{
|
|
|
1474 |
((DUnpagedMemoryManager*)this)->DUnpagedMemoryManager::Destruct(aMemory);
|
|
|
1475 |
}
|
|
|
1476 |
|
|
|
1477 |
|
|
|
1478 |
TInt DPagedMemoryManager::StealPage(DMemoryObject* aMemory, SPageInfo* aPageInfo)
|
|
|
1479 |
{
|
|
|
1480 |
return ((DDiscardableMemoryManager*)this)->DDiscardableMemoryManager::StealPage(aMemory,aPageInfo);
|
|
|
1481 |
}
|
|
|
1482 |
|
|
|
1483 |
|
|
|
1484 |
TInt DPagedMemoryManager::MovePage( DMemoryObject* aMemory, SPageInfo* aOldPageInfo,
|
|
|
1485 |
TPhysAddr& aNewPage, TUint aBlockZoneId, TBool aBlockRest)
|
|
|
1486 |
{
|
|
|
1487 |
return TheMovableMemoryManager->MovePage(aMemory, aOldPageInfo, aNewPage, aBlockZoneId, aBlockRest);
|
|
|
1488 |
}
|
|
|
1489 |
|
|
|
1490 |
|
|
|
1491 |
TInt DPagedMemoryManager::RestrictPage(DMemoryObject* aMemory, SPageInfo* aPageInfo, TRestrictPagesType aRestriction)
|
|
|
1492 |
{
|
|
|
1493 |
TRACE2(("DPagedMemoryManager::RestrictPage(0x%08x,0x%08x,%d)",aMemory,aPageInfo,aRestriction));
|
|
|
1494 |
__NK_ASSERT_DEBUG(MmuLock::IsHeld());
|
|
|
1495 |
|
|
|
1496 |
TUint index = aPageInfo->Index();
|
|
|
1497 |
TInt r = KErrNotFound;
|
|
|
1498 |
|
|
|
1499 |
TPhysAddr page;
|
|
|
1500 |
TPhysAddr originalPage;
|
|
|
1501 |
RPageArray::TIter pageList;
|
|
|
1502 |
TPhysAddr* p = aMemory->iPages.RestrictPageNAStart(index,pageList);
|
|
|
1503 |
if(!p)
|
|
|
1504 |
goto fail;
|
|
|
1505 |
originalPage = *p;
|
|
|
1506 |
__NK_ASSERT_DEBUG((originalPage&~KPageMask)==aPageInfo->PhysAddr());
|
|
|
1507 |
|
|
|
1508 |
aPageInfo->SetModifier(&pageList);
|
|
|
1509 |
|
|
|
1510 |
MmuLock::Unlock();
|
|
|
1511 |
|
|
|
1512 |
// restrict page...
|
|
|
1513 |
aMemory->RestrictPages(pageList,aRestriction);
|
|
|
1514 |
|
|
|
1515 |
MmuLock::Lock();
|
|
|
1516 |
|
|
|
1517 |
page = *p;
|
|
|
1518 |
if(aPageInfo->CheckModified(&pageList) || page!=originalPage/*page state changed*/)
|
|
|
1519 |
{
|
|
|
1520 |
// page state was changed by someone else...
|
|
|
1521 |
r = KErrInUse;
|
|
|
1522 |
}
|
|
|
1523 |
else
|
|
|
1524 |
{
|
|
|
1525 |
// nobody else has modified page state, so restrictions successfully applied...
|
|
|
1526 |
*p = (page&~RPageArray::EStateMask)|RPageArray::ECommitted; // restore state
|
|
|
1527 |
aPageInfo->SetReadOnly();
|
|
|
1528 |
r = KErrNone;
|
|
|
1529 |
}
|
|
|
1530 |
|
|
|
1531 |
aMemory->iPages.RestrictPageNAEnd(index);
|
|
|
1532 |
|
|
|
1533 |
#ifdef _DEBUG
|
|
|
1534 |
if(r!=KErrNone)
|
|
|
1535 |
TRACE2(("DPagedMemoryManager::RestrictPage fail because preempted or vetoed"));
|
|
|
1536 |
#endif
|
|
|
1537 |
|
|
|
1538 |
fail:
|
|
|
1539 |
TRACE2(("DPagedMemoryManager::RestrictPage returns %d",r));
|
|
|
1540 |
return r;
|
|
|
1541 |
}
|
|
|
1542 |
|
|
|
1543 |
|
|
|
1544 |
TInt DPagedMemoryManager::HandleFault( DMemoryObject* aMemory, TUint aIndex, DMemoryMapping* aMapping,
|
|
|
1545 |
TUint aMapInstanceCount, TUint aAccessPermissions)
|
|
|
1546 |
{
|
|
|
1547 |
TPinArgs pinArgs;
|
|
|
1548 |
pinArgs.iReadOnly = !(aAccessPermissions&EReadWrite);
|
|
|
1549 |
|
|
|
1550 |
TUint usedNew = 0;
|
|
|
1551 |
|
|
|
1552 |
RPageArray::TIter pageList;
|
|
|
1553 |
TPhysAddr* p = aMemory->iPages.AddPageStart(aIndex,pageList);
|
|
|
1554 |
__NK_ASSERT_ALWAYS(p); // we should never run out of memory handling a paging fault
|
|
|
1555 |
|
|
|
1556 |
TInt r = 1; // positive value to indicate nothing done
|
|
|
1557 |
|
|
|
1558 |
// if memory object already has page, then we can use it...
|
|
|
1559 |
MmuLock::Lock();
|
|
|
1560 |
if(RPageArray::IsPresent(*p))
|
|
|
1561 |
{
|
|
|
1562 |
r = PageInDone(aMemory,aIndex,0,p);
|
|
|
1563 |
__NK_ASSERT_DEBUG(r<=0); // can't return >0 as we didn't supply a new page
|
|
|
1564 |
}
|
|
|
1565 |
MmuLock::Unlock();
|
|
|
1566 |
|
|
|
1567 |
if(r>0)
|
|
|
1568 |
{
|
|
|
1569 |
// need to read page from backing store...
|
|
|
1570 |
|
|
|
1571 |
// get paging request object...
|
|
|
1572 |
DPageReadRequest* req;
|
|
|
1573 |
do
|
|
|
1574 |
{
|
|
|
1575 |
r = AcquirePageReadRequest(req,aMemory,aIndex,1);
|
|
|
1576 |
__NK_ASSERT_DEBUG(r!=KErrNoMemory); // not allowed to allocated memory, therefore can't fail with KErrNoMemory
|
|
|
1577 |
if(r==KErrNone)
|
|
|
1578 |
{
|
|
|
1579 |
// if someone else has since read our page, then we can use it...
|
|
|
1580 |
MmuLock::Lock();
|
|
|
1581 |
r = 1;
|
|
|
1582 |
if(RPageArray::IsPresent(*p))
|
|
|
1583 |
{
|
|
|
1584 |
r = PageInDone(aMemory,aIndex,0,p);
|
|
|
1585 |
__NK_ASSERT_DEBUG(r<=0); // can't return >0 as we didn't supply a new page
|
|
|
1586 |
}
|
|
|
1587 |
MmuLock::Unlock();
|
|
|
1588 |
}
|
|
|
1589 |
}
|
|
|
1590 |
while(r>0 && !req); // while not paged in && don't have a request object
|
|
|
1591 |
|
|
|
1592 |
if(r>0)
|
|
|
1593 |
{
|
|
|
1594 |
// still need to read page from backing store...
|
|
|
1595 |
|
|
|
1596 |
// get RAM page...
|
|
|
1597 |
TPhysAddr pagePhys;
|
|
|
1598 |
r = ThePager.PageInAllocPages(&pagePhys,1,aMemory->RamAllocFlags());
|
|
|
1599 |
__NK_ASSERT_DEBUG(r!=KErrNoMemory);
|
|
|
1600 |
if(r==KErrNone)
|
|
|
1601 |
{
|
|
|
1602 |
// read data for page...
|
|
|
1603 |
r = ReadPages(aMemory,aIndex,1,&pagePhys,req);
|
|
|
1604 |
__NK_ASSERT_DEBUG(r!=KErrNoMemory); // not allowed to allocated memory, therefore can't fail with KErrNoMemory
|
|
|
1605 |
if(r!=KErrNone)
|
|
|
1606 |
{
|
|
|
1607 |
// error, so free unused pages...
|
|
|
1608 |
ThePager.PageInFreePages(&pagePhys,1);
|
|
|
1609 |
}
|
|
|
1610 |
else
|
|
|
1611 |
{
|
|
|
1612 |
// use new page...
|
|
|
1613 |
MmuLock::Lock();
|
|
|
1614 |
r = PageInDone(aMemory,aIndex,SPageInfo::FromPhysAddr(pagePhys),p);
|
|
|
1615 |
MmuLock::Unlock();
|
|
|
1616 |
if(r>0)
|
|
|
1617 |
{
|
|
|
1618 |
// new page actually used...
|
|
|
1619 |
r = KErrNone;
|
|
|
1620 |
usedNew = 1;
|
|
|
1621 |
}
|
|
|
1622 |
}
|
|
|
1623 |
}
|
|
|
1624 |
}
|
|
|
1625 |
|
|
|
1626 |
// done with paging request object...
|
|
|
1627 |
if(req)
|
|
|
1628 |
req->Release();
|
|
|
1629 |
}
|
|
|
1630 |
|
|
|
1631 |
// map page...
|
|
|
1632 |
if(r==KErrNone && aMapping)
|
|
|
1633 |
{
|
|
|
1634 |
r = aMapping->PageIn(pageList, pinArgs, aMapInstanceCount);
|
|
|
1635 |
__NK_ASSERT_ALWAYS(r!=KErrNoMemory); // we should never run out of memory handling a paging fault
|
|
|
1636 |
#ifdef COARSE_GRAINED_TLB_MAINTENANCE
|
|
|
1637 |
InvalidateTLB();
|
|
|
1638 |
#endif
|
|
|
1639 |
}
|
|
|
1640 |
|
|
|
1641 |
// finished with this page...
|
|
|
1642 |
aMemory->iPages.AddPageEnd(aIndex,usedNew);
|
|
|
1643 |
|
|
|
1644 |
__NK_ASSERT_ALWAYS(r!=KErrNoMemory); // we should never run out of memory handling a paging fault
|
|
|
1645 |
return r;
|
|
|
1646 |
}
|
|
|
1647 |
|
|
|
1648 |
|
|
|
1649 |
TInt DPagedMemoryManager::Pin(DMemoryObject* aMemory, DMemoryMappingBase* aMapping, TPinArgs& aPinArgs)
|
|
|
1650 |
{
|
|
|
1651 |
__ASSERT_CRITICAL;
|
|
|
1652 |
return DoPin(aMemory,aMapping->iStartIndex,aMapping->iSizeInPages,aMapping,aPinArgs);
|
|
|
1653 |
}
|
|
|
1654 |
|
|
|
1655 |
|
|
|
1656 |
TInt DPagedMemoryManager::DoPin(DMemoryObject* aMemory, TUint aIndex, TUint aCount, DMemoryMappingBase* aMapping, TPinArgs& aPinArgs)
|
|
|
1657 |
{
|
|
|
1658 |
TRACE(("DPagedMemoryManager::DoPin(0x%08x,0x%08x,0x%08x,0x%08x)",aMemory, aIndex, aCount, aMapping));
|
|
|
1659 |
__ASSERT_CRITICAL;
|
|
|
1660 |
__NK_ASSERT_DEBUG(aPinArgs.HaveSufficientPages(aCount));
|
|
|
1661 |
|
|
|
1662 |
// check and allocate page array entries...
|
|
|
1663 |
RPageArray::TIter pageList;
|
|
|
1664 |
TInt r = aMemory->iPages.AddStart(aIndex,aCount,pageList,true);
|
|
|
1665 |
if(r!=KErrNone)
|
|
|
1666 |
return r;
|
|
|
1667 |
|
|
|
1668 |
RPageArray::TIter pageIter = pageList;
|
|
|
1669 |
TUint n;
|
|
|
1670 |
TPhysAddr* pages;
|
|
|
1671 |
while((n=pageIter.Pages(pages,DPageReadRequest::EMaxPages))!=0)
|
|
|
1672 |
{
|
|
|
1673 |
MmuLock::Lock();
|
|
|
1674 |
|
|
|
1675 |
if(RPageArray::IsPresent(*pages))
|
|
|
1676 |
{
|
|
|
1677 |
// pin page which is already committed to memory object...
|
|
|
1678 |
r = PageInPinnedDone(aMemory,pageIter.Index(),0,pages,aPinArgs);
|
|
|
1679 |
__NK_ASSERT_DEBUG(r<=0); // can't return >0 as we didn't supply a new page
|
|
|
1680 |
}
|
|
|
1681 |
else
|
|
|
1682 |
{
|
|
|
1683 |
// count consecutive pages which need to be read...
|
|
|
1684 |
TUint i;
|
|
|
1685 |
for(i=1; i<n; ++i)
|
|
|
1686 |
if(RPageArray::IsPresent(pages[i]))
|
|
|
1687 |
break;
|
|
|
1688 |
n = i;
|
|
|
1689 |
r = 1; // positive value to indicate nothing done
|
|
|
1690 |
}
|
|
|
1691 |
|
|
|
1692 |
MmuLock::Unlock();
|
|
|
1693 |
|
|
|
1694 |
if(r==KErrNone)
|
|
|
1695 |
{
|
|
|
1696 |
// successfully pinned one page, so move on to next one...
|
|
|
1697 |
pageIter.Skip(1);
|
|
|
1698 |
continue;
|
|
|
1699 |
}
|
|
|
1700 |
else if(r<0)
|
|
|
1701 |
{
|
|
|
1702 |
// error, so end...
|
|
|
1703 |
break;
|
|
|
1704 |
}
|
|
|
1705 |
|
|
|
1706 |
// need to read pages from backing store...
|
|
|
1707 |
|
|
|
1708 |
// get paging request object...
|
|
|
1709 |
DPageReadRequest* req;
|
|
|
1710 |
TUint i;
|
|
|
1711 |
do
|
|
|
1712 |
{
|
|
|
1713 |
i = 0;
|
|
|
1714 |
r = AcquirePageReadRequest(req,aMemory,pageIter.Index(),n);
|
|
|
1715 |
if(r==KErrNone)
|
|
|
1716 |
{
|
|
|
1717 |
// see if someone else has since read any of our pages...
|
|
|
1718 |
MmuLock::Lock();
|
|
|
1719 |
for(; i<n; ++i)
|
|
|
1720 |
if(RPageArray::IsPresent(pages[i]))
|
|
|
1721 |
break;
|
|
|
1722 |
MmuLock::Unlock();
|
|
|
1723 |
}
|
|
|
1724 |
}
|
|
|
1725 |
while(i==n && !req); // while still need all pages && don't have a request object
|
|
|
1726 |
|
|
|
1727 |
// if don't need all pages any more...
|
|
|
1728 |
if(i!=n)
|
|
|
1729 |
{
|
|
|
1730 |
// retry loop...
|
|
|
1731 |
if(req)
|
|
|
1732 |
req->Release();
|
|
|
1733 |
continue;
|
|
|
1734 |
}
|
|
|
1735 |
|
|
|
1736 |
// keep count of number of pages actually added to memory object...
|
|
|
1737 |
TUint usedNew = 0;
|
|
|
1738 |
|
|
|
1739 |
// get RAM pages...
|
|
|
1740 |
TPhysAddr newPages[DPageReadRequest::EMaxPages];
|
|
|
1741 |
__NK_ASSERT_DEBUG(n<=DPageReadRequest::EMaxPages);
|
|
|
1742 |
r = ThePager.PageInAllocPages(newPages,n,aMemory->RamAllocFlags());
|
|
|
1743 |
if(r==KErrNone)
|
|
|
1744 |
{
|
|
|
1745 |
// read data for pages...
|
|
|
1746 |
r = ReadPages(aMemory,pageIter.Index(),n,newPages,req);
|
|
|
1747 |
if(r!=KErrNone)
|
|
|
1748 |
{
|
|
|
1749 |
// error, so free unused pages...
|
|
|
1750 |
ThePager.PageInFreePages(newPages,n);
|
|
|
1751 |
}
|
|
|
1752 |
else
|
|
|
1753 |
{
|
|
|
1754 |
// use new pages...
|
|
|
1755 |
for(i=0; i<n; ++i)
|
|
|
1756 |
{
|
|
|
1757 |
MmuLock::Lock();
|
|
|
1758 |
r = PageInPinnedDone(aMemory,
|
|
|
1759 |
pageIter.Index()+i,
|
|
|
1760 |
SPageInfo::FromPhysAddr(newPages[i]),
|
|
|
1761 |
pages+i,
|
|
|
1762 |
aPinArgs
|
|
|
1763 |
);
|
|
|
1764 |
MmuLock::Unlock();
|
|
|
1765 |
if(r>0)
|
|
|
1766 |
{
|
|
|
1767 |
// new page actually used...
|
|
|
1768 |
r = KErrNone;
|
|
|
1769 |
++usedNew;
|
|
|
1770 |
}
|
|
|
1771 |
if(r!=KErrNone)
|
|
|
1772 |
{
|
|
|
1773 |
// error, so free remaining unused pages...
|
|
|
1774 |
ThePager.PageInFreePages(newPages+(i+1),n-(i+1));
|
|
|
1775 |
// and update array for any pages already added...
|
|
|
1776 |
if(i)
|
|
|
1777 |
pageIter.Added(i,usedNew);
|
|
|
1778 |
break;
|
|
|
1779 |
}
|
|
|
1780 |
}
|
|
|
1781 |
}
|
|
|
1782 |
}
|
|
|
1783 |
|
|
|
1784 |
// done with paging request object...
|
|
|
1785 |
if(req)
|
|
|
1786 |
req->Release();
|
|
|
1787 |
|
|
|
1788 |
if(r!=KErrNone)
|
|
|
1789 |
break; // error, so give up
|
|
|
1790 |
|
|
|
1791 |
// move on to next set of pages...
|
|
|
1792 |
pageIter.Added(n,usedNew);
|
|
|
1793 |
}
|
|
|
1794 |
|
|
|
1795 |
// map pages...
|
|
|
1796 |
if(r==KErrNone)
|
|
|
1797 |
{// Page in the page with the pinning mapping, OK to get the instance count here
|
|
|
1798 |
// without any locking as the pinned mapping can't be reused for another purpose
|
|
|
1799 |
// during this method.
|
|
|
1800 |
r = aMapping->PageIn(pageList, aPinArgs, aMapping->MapInstanceCount());
|
|
|
1801 |
#ifdef COARSE_GRAINED_TLB_MAINTENANCE
|
|
|
1802 |
InvalidateTLB();
|
|
|
1803 |
#endif
|
|
|
1804 |
}
|
|
|
1805 |
|
|
|
1806 |
// release page array entries...
|
|
|
1807 |
aMemory->iPages.AddEnd(aIndex,aCount);
|
|
|
1808 |
|
|
|
1809 |
if(r==KErrNone)
|
|
|
1810 |
{
|
|
|
1811 |
// set EPagesPinned flag to indicate success...
|
|
|
1812 |
__NK_ASSERT_DEBUG((aMapping->Flags()&DMemoryMapping::EPagesPinned)==0);
|
|
|
1813 |
__e32_atomic_ior_ord8(&aMapping->Flags(), (TUint8)DMemoryMapping::EPagesPinned);
|
|
|
1814 |
}
|
|
|
1815 |
else
|
|
|
1816 |
{
|
|
|
1817 |
// cleanup on error...
|
|
|
1818 |
TUint pinnedCount = pageIter.Index()-aIndex; // number of pages actually pinned
|
|
|
1819 |
DoUnpin(aMemory,aIndex,pinnedCount,aMapping,aPinArgs);
|
|
|
1820 |
}
|
|
|
1821 |
|
|
|
1822 |
return r;
|
|
|
1823 |
}
|
|
|
1824 |
|
|
|
1825 |
|
|
|
1826 |
void DPagedMemoryManager::Unpin(DMemoryObject* aMemory, DMemoryMappingBase* aMapping, TPinArgs& aPinArgs)
|
|
|
1827 |
{
|
|
|
1828 |
__ASSERT_CRITICAL;
|
|
|
1829 |
// if mapping successfully pinned...
|
|
|
1830 |
if(aMapping->Flags()&DMemoryMapping::EPagesPinned)
|
|
|
1831 |
{
|
|
|
1832 |
// then undo pinning...
|
|
|
1833 |
DoUnpin(aMemory,aMapping->iStartIndex,aMapping->iSizeInPages,aMapping,aPinArgs);
|
|
|
1834 |
}
|
|
|
1835 |
}
|
|
|
1836 |
|
|
|
1837 |
|
|
|
1838 |
void DPagedMemoryManager::DoUnpin(DMemoryObject* aMemory, TUint aIndex, TUint aCount, DMemoryMappingBase* aMapping, TPinArgs& aPinArgs)
|
|
|
1839 |
{
|
|
|
1840 |
TRACE(("DPagedMemoryManager::DoUnpin(0x%08x,0x%08x,0x%08x,0x%08x,?)",aMemory, aIndex, aCount, aMapping));
|
|
|
1841 |
__ASSERT_CRITICAL;
|
|
|
1842 |
|
|
|
1843 |
MmuLock::Lock();
|
|
|
1844 |
TUint endIndex = aIndex+aCount;
|
|
|
1845 |
for(TUint i=aIndex; i<endIndex; ++i)
|
|
|
1846 |
{
|
|
|
1847 |
TPhysAddr page = aMemory->iPages.Page(i);
|
|
|
1848 |
__NK_ASSERT_DEBUG(RPageArray::IsPresent(page));
|
|
|
1849 |
__NK_ASSERT_DEBUG(SPageInfo::SafeFromPhysAddr(page&~KPageMask));
|
|
|
1850 |
ThePager.Unpin(SPageInfo::FromPhysAddr(page),aPinArgs);
|
|
|
1851 |
MmuLock::Flash();
|
|
|
1852 |
}
|
|
|
1853 |
MmuLock::Unlock();
|
|
|
1854 |
|
|
|
1855 |
// clear EPagesPinned flag...
|
|
|
1856 |
__e32_atomic_and_ord8(&aMapping->Flags(), TUint8(~DMemoryMapping::EPagesPinned));
|
|
|
1857 |
}
|
|
|
1858 |
|
|
|
1859 |
|
|
|
1860 |
void DPagedMemoryManager::DoCleanupDecommitted(DMemoryObject* aMemory)
|
|
|
1861 |
{
|
|
|
1862 |
MemoryObjectLock::Lock(aMemory);
|
|
|
1863 |
FreeDecommitted(aMemory,0,aMemory->iSizeInPages);
|
|
|
1864 |
MemoryObjectLock::Unlock(aMemory);
|
|
|
1865 |
}
|
|
|
1866 |
|
|
|
1867 |
|
|
|
1868 |
TInt DPagedMemoryManager::PageInDone(DMemoryObject* aMemory, TUint aIndex, SPageInfo* aPageInfo, TPhysAddr* aPageArrayEntry)
|
|
|
1869 |
{
|
|
|
1870 |
TInt r = DoPageInDone(aMemory,aIndex,aPageInfo,aPageArrayEntry,false);
|
|
|
1871 |
|
|
|
1872 |
if(r>=0)
|
|
|
1873 |
ThePager.PagedIn(aPageInfo);
|
|
|
1874 |
|
|
|
1875 |
// check page assigned correctly...
|
|
|
1876 |
#ifdef _DEBUG
|
|
|
1877 |
if(RPageArray::IsPresent(*aPageArrayEntry))
|
|
|
1878 |
{
|
|
|
1879 |
SPageInfo* pi = SPageInfo::FromPhysAddr(*aPageArrayEntry);
|
|
|
1880 |
__NK_ASSERT_DEBUG(pi->Owner()==aMemory);
|
|
|
1881 |
__NK_ASSERT_DEBUG(pi->Index()==aIndex);
|
|
|
1882 |
}
|
|
|
1883 |
#endif
|
|
|
1884 |
|
|
|
1885 |
return r;
|
|
|
1886 |
}
|
|
|
1887 |
|
|
|
1888 |
|
|
|
1889 |
TInt DPagedMemoryManager::PageInPinnedDone(DMemoryObject* aMemory, TUint aIndex, SPageInfo* aPageInfo, TPhysAddr* aPageArrayEntry, TPinArgs& aPinArgs)
|
|
|
1890 |
{
|
|
|
1891 |
TInt r = DoPageInDone(aMemory,aIndex,aPageInfo,aPageArrayEntry,true);
|
|
|
1892 |
|
|
|
1893 |
if(r>=0)
|
|
|
1894 |
ThePager.PagedInPinned(aPageInfo,aPinArgs);
|
|
|
1895 |
|
|
|
1896 |
// check page assigned correctly...
|
|
|
1897 |
#ifdef _DEBUG
|
|
|
1898 |
if(RPageArray::IsPresent(*aPageArrayEntry))
|
|
|
1899 |
{
|
|
|
1900 |
SPageInfo* pi = SPageInfo::FromPhysAddr(*aPageArrayEntry);
|
|
|
1901 |
__NK_ASSERT_DEBUG(pi->Owner()==aMemory);
|
|
|
1902 |
__NK_ASSERT_DEBUG(pi->Index()==aIndex);
|
|
|
1903 |
if(r>=0)
|
|
|
1904 |
__NK_ASSERT_DEBUG(pi->PagedState()==SPageInfo::EPagedPinned);
|
|
|
1905 |
}
|
|
|
1906 |
#endif
|
|
|
1907 |
|
|
|
1908 |
return r;
|
|
|
1909 |
}
|
|
|
1910 |
|
|
|
1911 |
|
|
|
1912 |
TInt DPagedMemoryManager::DoPageInDone(DMemoryObject* aMemory, TUint aIndex, SPageInfo*& aPageInfo, TPhysAddr* aPageArrayEntry, TBool aPinning)
|
|
|
1913 |
{
|
|
|
1914 |
TRACE(("DPagedMemoryManager::DoPageInDone(0x%08x,0x%08x,0x%08x,?,%d)",aMemory,aIndex,aPageInfo,aPinning));
|
|
|
1915 |
__NK_ASSERT_DEBUG(MmuLock::IsHeld());
|
|
|
1916 |
|
|
|
1917 |
__UNLOCK_GUARD_START(MmuLock);
|
|
|
1918 |
|
|
|
1919 |
SPageInfo* pi = aPageInfo;
|
|
|
1920 |
|
|
|
1921 |
if(!IsAllocated(aMemory,aIndex,1))
|
|
|
1922 |
{
|
|
|
1923 |
// memory has been decommitted from memory object...
|
|
|
1924 |
if(pi)
|
|
|
1925 |
ThePager.PagedInUnneeded(pi);
|
|
|
1926 |
__UNLOCK_GUARD_END(MmuLock);
|
|
|
1927 |
aPageInfo = 0;
|
|
|
1928 |
return KErrNotFound;
|
|
|
1929 |
}
|
|
|
1930 |
|
|
|
1931 |
TPhysAddr oldPage = *aPageArrayEntry;
|
|
|
1932 |
TBool useNew = (bool)!RPageArray::IsPresent(oldPage);
|
|
|
1933 |
if(useNew)
|
|
|
1934 |
{
|
|
|
1935 |
if(!pi)
|
|
|
1936 |
{
|
|
|
1937 |
__UNLOCK_GUARD_END(MmuLock);
|
|
|
1938 |
// aPageInfo = 0; // this is already set to zero
|
|
|
1939 |
return KErrNotFound; // no new page to use
|
|
|
1940 |
}
|
|
|
1941 |
|
|
|
1942 |
// assign page to memory object...
|
|
|
1943 |
pi->SetManaged(aMemory,aIndex,aMemory->PageInfoFlags());
|
|
|
1944 |
|
|
|
1945 |
ThePager.Event(DPager::EEventPageInNew,pi);
|
|
|
1946 |
|
|
|
1947 |
// save any paging manager data stored in page array before we overwrite it...
|
|
|
1948 |
pi->SetPagingManagerData(*aPageArrayEntry);
|
|
|
1949 |
}
|
|
|
1950 |
else
|
|
|
1951 |
{
|
|
|
1952 |
__NK_ASSERT_DEBUG(!pi); // should only have read new page if none present
|
|
|
1953 |
|
|
|
1954 |
// discard new page...
|
|
|
1955 |
if(pi)
|
|
|
1956 |
ThePager.PagedInUnneeded(pi);
|
|
|
1957 |
|
|
|
1958 |
// check existing page can be committed...
|
|
|
1959 |
if(RPageArray::State(oldPage)<=RPageArray::EDecommitting)
|
|
|
1960 |
{
|
|
|
1961 |
__UNLOCK_GUARD_END(MmuLock);
|
|
|
1962 |
aPageInfo = 0;
|
|
|
1963 |
return KErrNotFound;
|
|
|
1964 |
}
|
|
|
1965 |
|
|
|
1966 |
// and use one we already have...
|
|
|
1967 |
SPageInfo* newPage = SPageInfo::FromPhysAddr(oldPage);
|
|
|
1968 |
|
|
|
1969 |
if(!pi && !aPinning)
|
|
|
1970 |
ThePager.Event(DPager::EEventPageInAgain,newPage);
|
|
|
1971 |
|
|
|
1972 |
pi = newPage;
|
|
|
1973 |
pi->SetModifier(0); // so observers see page state has changed
|
|
|
1974 |
}
|
|
|
1975 |
|
|
|
1976 |
// set page array entry...
|
|
|
1977 |
TPhysAddr pagePhys = pi->PhysAddr();
|
|
|
1978 |
*aPageArrayEntry = pagePhys|RPageArray::ECommitted;
|
|
|
1979 |
|
|
|
1980 |
// return the page we actually used...
|
|
|
1981 |
aPageInfo = pi;
|
|
|
1982 |
|
|
|
1983 |
__UNLOCK_GUARD_END(MmuLock);
|
|
|
1984 |
return useNew;
|
|
|
1985 |
}
|
|
|
1986 |
|
|
|
1987 |
|
|
|
1988 |
TInt DPagedMemoryManager::Decompress(TUint32 aCompressionType, TLinAddr aDst, TUint aDstBytes, TLinAddr aSrc, TUint aSrcBytes)
|
|
|
1989 |
{
|
|
|
1990 |
#ifdef BTRACE_PAGING_VERBOSE
|
|
|
1991 |
BTraceContext4(BTrace::EPaging, BTrace::EPagingDecompressStart, aCompressionType);
|
|
|
1992 |
#endif
|
|
|
1993 |
TInt r;
|
|
|
1994 |
switch(aCompressionType)
|
|
|
1995 |
{
|
|
|
1996 |
case 0:
|
|
|
1997 |
__NK_ASSERT_DEBUG(aSrcBytes == aDstBytes);
|
|
|
1998 |
memcpy((void*)aDst, (void*)aSrc, aSrcBytes);
|
|
|
1999 |
r = aSrcBytes;
|
|
|
2000 |
break;
|
|
|
2001 |
|
|
|
2002 |
case SRomPageInfo::EBytePair:
|
|
|
2003 |
case KUidCompressionBytePair:
|
|
|
2004 |
{
|
|
|
2005 |
TUint8* srcNext = 0;
|
|
|
2006 |
START_PAGING_BENCHMARK;
|
|
|
2007 |
r = BytePairDecompress((TUint8*)aDst, aDstBytes, (TUint8*)aSrc, aSrcBytes, srcNext);
|
|
|
2008 |
END_PAGING_BENCHMARK(EPagingBmDecompress);
|
|
|
2009 |
if (r > 0)
|
|
|
2010 |
{
|
|
|
2011 |
// decompression successful so check srcNext points to the end of the compressed data...
|
|
|
2012 |
__NK_ASSERT_ALWAYS((TLinAddr)srcNext == aSrc + aSrcBytes);
|
|
|
2013 |
}
|
|
|
2014 |
}
|
|
|
2015 |
break;
|
|
|
2016 |
|
|
|
2017 |
default:
|
|
|
2018 |
r = KErrNotSupported;
|
|
|
2019 |
break;
|
|
|
2020 |
}
|
|
|
2021 |
#ifdef BTRACE_PAGING_VERBOSE
|
|
|
2022 |
BTraceContext0(BTrace::EPaging, BTrace::EPagingDecompressEnd);
|
|
|
2023 |
#endif
|
|
|
2024 |
return r;
|
|
|
2025 |
}
|
|
|
2026 |
|
|
|
2027 |
|
|
|
2028 |
TInt DPagedMemoryManager::AcquirePageWriteRequest(DPageWriteRequest*& aRequest, DMemoryObject* aMemory, TUint aIndex, TUint aCount)
|
|
|
2029 |
{
|
|
|
2030 |
__NK_ASSERT_ALWAYS(0);
|
|
|
2031 |
return KErrNotSupported;
|
|
|
2032 |
}
|
|
|
2033 |
|
|
|
2034 |
|
|
|
2035 |
TInt DPagedMemoryManager::WritePages(DMemoryObject* aMemory, TUint aIndex, TUint aCount, TPhysAddr* aPages, DPageWriteRequest* aRequest)
|
|
|
2036 |
{
|
|
|
2037 |
__NK_ASSERT_ALWAYS(0);
|
|
|
2038 |
return KErrNotSupported;
|
|
|
2039 |
}
|
|
|
2040 |
|
|
|
2041 |
TZonePageType DPagedMemoryManager::PageType()
|
|
|
2042 |
{// Paged manager's pages should be discardable and will actaully be freed by
|
|
|
2043 |
// the pager so this value won't be used.
|
|
|
2044 |
return EPageDiscard;
|
|
|
2045 |
}
|
|
|
2046 |
|