PGMPhys.cpp@ 1138

Last change on this file since 1138 was 1099, checked in by vboxsync, 18 years ago
Out of memory in dynamic guest ram alloc: Pause first, then inform Main.
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1	/* $Id: PGMPhys.cpp 1099 2007-02-28 11:09:28Z vboxsync $ */
2	/** @file
3	* PGM - Page Manager and Monitor, Physical Memory Addressing.
4	*/
5
6	/*
7	* Copyright (C) 2006 InnoTek Systemberatung GmbH
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License as published by the Free Software Foundation,
13	* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
14	* distribution. VirtualBox OSE is distributed in the hope that it will
15	* be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* If you received this file as part of a commercial VirtualBox
18	* distribution, then only the terms of your commercial VirtualBox
19	* license agreement apply instead of the previous paragraph.
20	*/
21
22
23	/*******************************************************************************
24	* Header Files *
25	*******************************************************************************/
26	#define LOG_GROUP LOG_GROUP_PGM
27	#include <VBox/pgm.h>
28	#include <VBox/cpum.h>
29	#include <VBox/iom.h>
30	#include <VBox/sup.h>
31	#include <VBox/mm.h>
32	#include <VBox/pdm.h>
33	#include <VBox/stam.h>
34	#include <VBox/rem.h>
35	#include <VBox/csam.h>
36	#include "PGMInternal.h"
37	#include <VBox/vm.h>
38	#include <VBox/dbg.h>
39	#include <VBox/param.h>
40	#include <VBox/err.h>
41	#include <iprt/assert.h>
42	#include <iprt/alloc.h>
43	#include <iprt/asm.h>
44	#include <VBox/log.h>
45	#include <iprt/thread.h>
46	#include <iprt/string.h>
47
48
49
50
51	/**
52	* Interface MMR3RamRegister(), MMR3RomRegister() and MMIO handler
53	* registration calls.
54	*
55	* It registers the physical memory range with PGM. MM is responsible
56	* for the toplevel things - allocation and locking - while PGM is taking
57	* care of all the details and implements the physical address space virtualization.
58	*
59	* @returns VBox status.
60	* @param pVM The VM handle.
61	* @param pvRam HC virtual address of the RAM range. (page aligned)
62	* @param GCPhys GC physical address of the RAM range. (page aligned)
63	* @param cb Size of the RAM range. (page aligned)
64	* @param fFlags Flags, MM_RAM_*.
65	* @param paPages Pointer an array of physical page descriptors.
66	* @param pszDesc Description string.
67	*/
68	PGMR3DECL(int) PGMR3PhysRegister(PVM pVM, void pvRam, RTGCPHYS GCPhys, size_t cb, unsigned fFlags, const SUPPAGE paPages, const char *pszDesc)
69	{
70	/*
71	* Validate input.
72	* (Not so important because callers are only MMR3PhysRegister()
73	* and PGMR3HandlerPhysicalRegisterEx(), but anyway...)
74	*/
75	Log(("PGMR3PhysRegister %08X %x bytes flags %x %s\n", GCPhys, cb, fFlags, pszDesc));
76
77	Assert((fFlags & (MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_DYNAMIC_ALLOC)) \|\| paPages);
78	/Assert(!(fFlags & MM_RAM_FLAGS_RESERVED) \|\| !paPages);/
79	Assert((fFlags == (MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_MMIO)) \|\| (fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC) \|\| pvRam);
80	/Assert(!(fFlags & MM_RAM_FLAGS_RESERVED) \|\| !pvRam);/
81	Assert(!(fFlags & ~0xfff));
82	Assert(RT_ALIGN_Z(cb, PAGE_SIZE) == cb && cb);
83	Assert(RT_ALIGN_P(pvRam, PAGE_SIZE) == pvRam);
84	Assert(!(fFlags & ~(MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_ROM \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_MMIO2 \| MM_RAM_FLAGS_DYNAMIC_ALLOC)));
85	Assert(RT_ALIGN_T(GCPhys, PAGE_SIZE, RTGCPHYS) == GCPhys);
86	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
87	if (GCPhysLast < GCPhys)
88	{
89	AssertMsgFailed(("The range wraps! GCPhys=%VGp cb=%#x\n", GCPhys, cb));
90	return VERR_INVALID_PARAMETER;
91	}
92
93	/*
94	* Find range location and check for conflicts.
95	*/
96	PPGMRAMRANGE pPrev = NULL;
97	PPGMRAMRANGE pCur = pVM->pgm.s.pRamRangesHC;
98	while (pCur)
99	{
100	if (GCPhys <= pCur->GCPhysLast && GCPhysLast >= pCur->GCPhys)
101	{
102	AssertMsgFailed(("Conflict! This cannot happen!\n"));
103	return VERR_PGM_RAM_CONFLICT;
104	}
105	if (GCPhysLast < pCur->GCPhys)
106	break;
107
108	/* next */
109	pPrev = pCur;
110	pCur = pCur->pNextHC;
111	}
112
113	/*
114	* Allocate RAM range.
115	* Small ranges are allocated from the heap, big ones have separate mappings.
116	*/
117	size_t cbRam = RT_OFFSETOF(PGMRAMRANGE, aHCPhys[cb >> PAGE_SHIFT]);
118	PPGMRAMRANGE pNew;
119	RTGCPTR GCPtrNew;
120	int rc;
121	if (cbRam > PAGE_SIZE / 2)
122	{ /* large */
123	cbRam = RT_ALIGN_Z(cbRam, PAGE_SIZE);
124	rc = SUPPageAlloc(cbRam >> PAGE_SHIFT, (void **)&pNew);
125	if (VBOX_SUCCESS(rc))
126	{
127	rc = MMR3HyperMapHCRam(pVM, pNew, cbRam, true, pszDesc, &GCPtrNew);
128	if (VBOX_SUCCESS(rc))
129	{
130	Assert(MMHyperHC2GC(pVM, pNew) == GCPtrNew);
131	rc = MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
132	}
133	else
134	{
135	AssertMsgFailed(("MMR3HyperMapHCRam(,,%#x,,,) -> %Vrc\n", cbRam, rc));
136	SUPPageFree(pNew);
137	}
138	}
139	else
140	AssertMsgFailed(("SUPPageAlloc(%#x,,) -> %Vrc\n", cbRam >> PAGE_SHIFT, rc));
141	}
142	else
143	{ /* small */
144	rc = MMHyperAlloc(pVM, cbRam, 16, MM_TAG_PGM, (void **)&pNew);
145	if (VBOX_SUCCESS(rc))
146	GCPtrNew = MMHyperHC2GC(pVM, pNew);
147	else
148	AssertMsgFailed(("MMHyperAlloc(,%#x,,,) -> %Vrc\n", cbRam, cb));
149	}
150	if (VBOX_SUCCESS(rc))
151	{
152	/*
153	* Initialize the range.
154	*/
155	pNew->pvHC = pvRam;
156	pNew->GCPhys = GCPhys;
157	pNew->GCPhysLast = GCPhysLast;
158	pNew->cb = cb;
159	pNew->fFlags = fFlags;
160	pNew->pavHCChunkHC = NULL;
161	pNew->pavHCChunkGC = 0;
162
163	unsigned iPage = cb >> PAGE_SHIFT;
164	if (paPages)
165	{
166	while (iPage-- > 0)
167	pNew->aHCPhys[iPage] = (paPages[iPage].Phys & X86_PTE_PAE_PG_MASK) \| fFlags;
168	}
169	else if (fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC)
170	{
171	/* Allocate memory for chunk to HC ptr lookup array. */
172	rc = MMHyperAlloc(pVM, (cb >> PGM_DYNAMIC_CHUNK_SHIFT) * sizeof(void ), 16, MM_TAG_PGM, (void *)&pNew->pavHCChunkHC);
173	AssertMsgReturn(rc == VINF_SUCCESS, ("MMHyperAlloc(,%#x,,,) -> %Vrc\n", cbRam, cb), rc);
174
175	pNew->pavHCChunkGC = MMHyperHC2GC(pVM, pNew->pavHCChunkHC);
176	Assert(pNew->pavHCChunkGC);
177
178	/* Physical memory will be allocated on demand. */
179	while (iPage-- > 0)
180	pNew->aHCPhys[iPage] = fFlags;
181	}
182	else
183	{
184	Assert(fFlags == (MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_MMIO));
185	RTHCPHYS HCPhysDummyPage = (MMR3PageDummyHCPhys(pVM) & X86_PTE_PAE_PG_MASK) \| fFlags;
186	while (iPage-- > 0)
187	pNew->aHCPhys[iPage] = HCPhysDummyPage;
188	}
189
190	/*
191	* Insert the new RAM range.
192	*/
193	pgmLock(pVM);
194	pNew->pNextHC = pCur;
195	pNew->pNextGC = pCur ? MMHyperHC2GC(pVM, pCur) : 0;
196	if (pPrev)
197	{
198	pPrev->pNextHC = pNew;
199	pPrev->pNextGC = GCPtrNew;
200	}
201	else
202	{
203	pVM->pgm.s.pRamRangesHC = pNew;
204	pVM->pgm.s.pRamRangesGC = GCPtrNew;
205	}
206	pgmUnlock(pVM);
207	}
208	return rc;
209	}
210
211
212	/**
213	* Register a chunk of a the physical memory range with PGM. MM is responsible
214	* for the toplevel things - allocation and locking - while PGM is taking
215	* care of all the details and implements the physical address space virtualization.
216	*
217	*
218	* @returns VBox status.
219	* @param pVM The VM handle.
220	* @param pvRam HC virtual address of the RAM range. (page aligned)
221	* @param GCPhys GC physical address of the RAM range. (page aligned)
222	* @param cb Size of the RAM range. (page aligned)
223	* @param fFlags Flags, MM_RAM_*.
224	* @param paPages Pointer an array of physical page descriptors.
225	* @param pszDesc Description string.
226	*/
227	PGMR3DECL(int) PGMR3PhysRegisterChunk(PVM pVM, void pvRam, RTGCPHYS GCPhys, size_t cb, unsigned fFlags, const SUPPAGE paPages, const char *pszDesc)
228	{
229	#ifdef PGM_DYNAMIC_RAM_ALLOC
230	NOREF(pszDesc);
231
232	/*
233	* Validate input.
234	* (Not so important because callers are only MMR3PhysRegister()
235	* and PGMR3HandlerPhysicalRegisterEx(), but anyway...)
236	*/
237	Log(("PGMR3PhysRegisterChunk %08X %x bytes flags %x %s\n", GCPhys, cb, fFlags, pszDesc));
238
239	Assert(paPages);
240	Assert(pvRam);
241	Assert(!(fFlags & ~0xfff));
242	Assert(RT_ALIGN_Z(cb, PAGE_SIZE) == cb && cb);
243	Assert(RT_ALIGN_P(pvRam, PAGE_SIZE) == pvRam);
244	Assert(!(fFlags & ~(MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_ROM \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_MMIO2 \| MM_RAM_FLAGS_DYNAMIC_ALLOC)));
245	Assert(RT_ALIGN_T(GCPhys, PAGE_SIZE, RTGCPHYS) == GCPhys);
246	Assert(VM_IS_EMT(pVM));
247	Assert(!(GCPhys & PGM_DYNAMIC_CHUNK_OFFSET_MASK));
248	Assert(cb == PGM_DYNAMIC_CHUNK_SIZE);
249
250	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
251	if (GCPhysLast < GCPhys)
252	{
253	AssertMsgFailed(("The range wraps! GCPhys=%VGp cb=%#x\n", GCPhys, cb));
254	return VERR_INVALID_PARAMETER;
255	}
256
257	/*
258	* Find existing range location.
259	*/
260	PPGMRAMRANGE pRam = CTXSUFF(pVM->pgm.s.pRamRanges);
261	while (pRam)
262	{
263	RTGCPHYS off = GCPhys - pRam->GCPhys;
264	if ( off < pRam->cb
265	&& (pRam->fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC))
266	break;
267
268	pRam = CTXSUFF(pRam->pNext);
269	}
270	AssertReturn(pRam, VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS);
271
272	unsigned off = (GCPhys - pRam->GCPhys) >> PAGE_SHIFT;
273	unsigned iPage = cb >> PAGE_SHIFT;
274	if (paPages)
275	{
276	while (iPage-- > 0)
277	pRam->aHCPhys[off + iPage] = (paPages[iPage].Phys & X86_PTE_PAE_PG_MASK) \| fFlags;
278	}
279	off >>= (PGM_DYNAMIC_CHUNK_SHIFT - PAGE_SHIFT);
280	pRam->pavHCChunkHC[off] = pvRam;
281
282	/* Notify the recompiler. */
283	REMR3NotifyPhysRamChunkRegister(pVM, GCPhys, PGM_DYNAMIC_CHUNK_SIZE, (RTHCUINTPTR)pvRam, fFlags);
284
285	return VINF_SUCCESS;
286	#else /* !PGM_DYNAMIC_RAM_ALLOC */
287	AssertReleaseMsgFailed(("Shouldn't ever get here when PGM_DYNAMIC_RAM_ALLOC isn't defined!\n"));
288	return VERR_INTERNAL_ERROR;
289	#endif /* !PGM_DYNAMIC_RAM_ALLOC */
290	}
291
292
293	/**
294	* Allocate missing physical pages for an existing guest RAM range.
295	*
296	* @returns VBox status.
297	* @param pVM The VM handle.
298	* @param GCPhys GC physical address of the RAM range. (page aligned)
299	*/
300	PGMR3DECL(int) PGM3PhysGrowRange(PVM pVM, RTGCPHYS GCPhys)
301	{
302	/*
303	* Walk range list.
304	*/
305	pgmLock(pVM);
306
307	PPGMRAMRANGE pRam = CTXSUFF(pVM->pgm.s.pRamRanges);
308	while (pRam)
309	{
310	RTGCPHYS off = GCPhys - pRam->GCPhys;
311	if ( off < pRam->cb
312	&& (pRam->fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC))
313	{
314	bool fRangeExists = false;
315	unsigned off = (GCPhys - pRam->GCPhys) >> PGM_DYNAMIC_CHUNK_SHIFT;
316
317	/** @note A request made from another thread may end up in EMT after somebody else has already allocated the range. */
318	if (pRam->pavHCChunkHC[off])
319	fRangeExists = true;
320
321	pgmUnlock(pVM);
322	if (fRangeExists)
323	return VINF_SUCCESS;
324	return pgmr3PhysGrowRange(pVM, GCPhys);
325	}
326
327	pRam = CTXSUFF(pRam->pNext);
328	}
329	pgmUnlock(pVM);
330	return VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
331	}
332
333
334	/**
335	* Allocate missing physical pages for an existing guest RAM range.
336	*
337	* @returns VBox status.
338	* @param pVM The VM handle.
339	* @param pRamRange RAM range
340	* @param GCPhys GC physical address of the RAM range. (page aligned)
341	*/
342	int pgmr3PhysGrowRange(PVM pVM, RTGCPHYS GCPhys)
343	{
344	void *pvRam;
345	int rc;
346
347	/* We must execute this function in the EMT thread, otherwise we'll run into problems. */
348	if (!VM_IS_EMT(pVM))
349	{
350	PVMREQ pReq;
351
352	AssertMsg(!PDMCritSectIsOwner(&pVM->pgm.s.CritSect), ("We own the PGM lock -> deadlock danger!!\n"));
353
354	rc = VMR3ReqCall(pVM, &pReq, RT_INDEFINITE_WAIT, (PFNRT)PGM3PhysGrowRange, 2, pVM, GCPhys);
355	if (VBOX_SUCCESS(rc))
356	{
357	rc = pReq->iStatus;
358	VMR3ReqFree(pReq);
359	}
360	return rc;
361	}
362
363	/* Round down to chunk boundary */
364	GCPhys = GCPhys & PGM_DYNAMIC_CHUNK_BASE_MASK;
365
366	STAM_COUNTER_INC(&pVM->pgm.s.StatDynRamGrow);
367	STAM_COUNTER_ADD(&pVM->pgm.s.StatDynRamTotal, PGM_DYNAMIC_CHUNK_SIZE/(1024*1024));
368
369	Log(("pgmr3PhysGrowRange: allocate chunk of size 0x%X at %VGp\n", PGM_DYNAMIC_CHUNK_SIZE, GCPhys));
370
371	unsigned cPages = PGM_DYNAMIC_CHUNK_SIZE >> PAGE_SHIFT;
372	rc = SUPPageAlloc(cPages, &pvRam);
373	if (VBOX_SUCCESS(rc))
374	{
375	VMSTATE enmVMState = VMR3GetState(pVM);
376
377	rc = MMR3PhysRegisterEx(pVM, pvRam, GCPhys, PGM_DYNAMIC_CHUNK_SIZE, 0, MM_PHYS_TYPE_DYNALLOC_CHUNK, "Main Memory");
378	if ( VBOX_SUCCESS(rc)
379	\|\| enmVMState != VMSTATE_RUNNING)
380	{
381	if (VBOX_FAILURE(rc))
382	{
383	AssertMsgFailed(("Out of memory while trying to allocate a guest RAM chunk at %VGp!\n", GCPhys));
384	LogRel(("PGM: Out of memory while trying to allocate a guest RAM chunk at %VGp (VMstate=%s)!\n", GCPhys, VMR3GetStateName(enmVMState)));
385	}
386	return rc;
387	}
388
389	SUPPageFree(pvRam);
390
391	LogRel(("pgmr3PhysGrowRange: out of memory. pause until the user resumes execution.\n"));
392
393	/* Pause first, then inform Main. */
394	rc = VMR3SuspendNoSave(pVM);
395	AssertRC(rc);
396
397	VMSetRuntimeError(pVM, false, "HostMemoryLow", "Unable to allocate and lock memory. The virtual machine will be paused. Please close applications to free up memory or close the VM.");
398
399	/* Wait for resume event; will only return in that case. If the VM is stopped, the EMT thread will be destroyed. */
400	rc = VMR3WaitForResume(pVM);
401
402	/* Retry */
403	LogRel(("pgmr3PhysGrowRange: VM execution resumed -> retry.\n"));
404	return pgmr3PhysGrowRange(pVM, GCPhys);
405	}
406	return rc;
407	}
408
409
410	/**
411	* Interface MMIO handler relocation calls.
412	*
413	* It relocates an existing physical memory range with PGM.
414	*
415	* @returns VBox status.
416	* @param pVM The VM handle.
417	* @param GCPhysOld Previous GC physical address of the RAM range. (page aligned)
418	* @param GCPhysNew New GC physical address of the RAM range. (page aligned)
419	* @param cb Size of the RAM range. (page aligned)
420	*/
421	PGMR3DECL(int) PGMR3PhysRelocate(PVM pVM, RTGCPHYS GCPhysOld, RTGCPHYS GCPhysNew, size_t cb)
422	{
423	/*
424	* Validate input.
425	* (Not so important because callers are only MMR3PhysRelocate(),
426	* but anyway...)
427	*/
428	Log(("PGMR3PhysRelocate Old %VGp New %VGp (%#x bytes)\n", GCPhysOld, GCPhysNew, cb));
429
430	Assert(RT_ALIGN_Z(cb, PAGE_SIZE) == cb && cb);
431	Assert(RT_ALIGN_T(GCPhysOld, PAGE_SIZE, RTGCPHYS) == GCPhysOld);
432	Assert(RT_ALIGN_T(GCPhysNew, PAGE_SIZE, RTGCPHYS) == GCPhysNew);
433	RTGCPHYS GCPhysLast;
434	GCPhysLast = GCPhysOld + (cb - 1);
435	if (GCPhysLast < GCPhysOld)
436	{
437	AssertMsgFailed(("The old range wraps! GCPhys=%VGp cb=%#x\n", GCPhysOld, cb));
438	return VERR_INVALID_PARAMETER;
439	}
440	GCPhysLast = GCPhysNew + (cb - 1);
441	if (GCPhysLast < GCPhysNew)
442	{
443	AssertMsgFailed(("The new range wraps! GCPhys=%VGp cb=%#x\n", GCPhysNew, cb));
444	return VERR_INVALID_PARAMETER;
445	}
446
447	/*
448	* Find and remove old range location.
449	*/
450	pgmLock(pVM);
451	PPGMRAMRANGE pPrev = NULL;
452	PPGMRAMRANGE pCur = pVM->pgm.s.pRamRangesHC;
453	while (pCur)
454	{
455	if (pCur->GCPhys == GCPhysOld && pCur->cb == cb)
456	break;
457
458	/* next */
459	pPrev = pCur;
460	pCur = pCur->pNextHC;
461	}
462	if (pPrev)
463	{
464	pPrev->pNextHC = pCur->pNextHC;
465	pPrev->pNextGC = pCur->pNextGC;
466	}
467	else
468	{
469	pVM->pgm.s.pRamRangesHC = pCur->pNextHC;
470	pVM->pgm.s.pRamRangesGC = pCur->pNextGC;
471	}
472
473	/*
474	* Update the range.
475	*/
476	pCur->GCPhys = GCPhysNew;
477	pCur->GCPhysLast= GCPhysLast;
478	PPGMRAMRANGE pNew = pCur;
479
480	/*
481	* Find range location and check for conflicts.
482	*/
483	pPrev = NULL;
484	pCur = pVM->pgm.s.pRamRangesHC;
485	while (pCur)
486	{
487	if (GCPhysNew <= pCur->GCPhysLast && GCPhysLast >= pCur->GCPhys)
488	{
489	AssertMsgFailed(("Conflict! This cannot happen!\n"));
490	pgmUnlock(pVM);
491	return VERR_PGM_RAM_CONFLICT;
492	}
493	if (GCPhysLast < pCur->GCPhys)
494	break;
495
496	/* next */
497	pPrev = pCur;
498	pCur = pCur->pNextHC;
499	}
500
501	/*
502	* Reinsert the RAM range.
503	*/
504	pNew->pNextHC = pCur;
505	pNew->pNextGC = pCur ? MMHyperHC2GC(pVM, pCur) : 0;
506	if (pPrev)
507	{
508	pPrev->pNextHC = pNew;
509	pPrev->pNextGC = MMHyperHC2GC(pVM, pNew);
510	}
511	else
512	{
513	pVM->pgm.s.pRamRangesHC = pNew;
514	pVM->pgm.s.pRamRangesGC = MMHyperHC2GC(pVM, pNew);
515	}
516
517	pgmUnlock(pVM);
518	return VINF_SUCCESS;
519	}
520
521
522	/**
523	* Interface MMR3RomRegister() and MMR3PhysReserve calls to update the
524	* flags of existing RAM ranges.
525	*
526	* @returns VBox status.
527	* @param pVM The VM handle.
528	* @param GCPhys GC physical address of the RAM range. (page aligned)
529	* @param cb Size of the RAM range. (page aligned)
530	* @param fFlags The Or flags, MM_RAM_* \#defines.
531	* @param fMask The and mask for the flags.
532	*/
533	PGMR3DECL(int) PGMR3PhysSetFlags(PVM pVM, RTGCPHYS GCPhys, size_t cb, unsigned fFlags, unsigned fMask)
534	{
535	Log(("PGMR3PhysSetFlags %08X %x %x %x\n", GCPhys, cb, fFlags, fMask));
536
537	/*
538	* Validate input.
539	* (Not so important because caller is always MMR3RomRegister() and MMR3PhysReserve(), but anyway...)
540	*/
541	Assert(!(fFlags & ~(MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_ROM \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_MMIO2)));
542	Assert(RT_ALIGN_Z(cb, PAGE_SIZE) == cb && cb);
543	Assert(RT_ALIGN_T(GCPhys, PAGE_SIZE, RTGCPHYS) == GCPhys);
544	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
545	AssertReturn(GCPhysLast > GCPhys, VERR_INVALID_PARAMETER);
546
547	/*
548	* Lookup the range.
549	*/
550	PPGMRAMRANGE pRam = CTXSUFF(pVM->pgm.s.pRamRanges);
551	while (pRam && GCPhys > pRam->GCPhysLast)
552	pRam = CTXSUFF(pRam->pNext);
553	if ( !pRam
554	\|\| GCPhys > pRam->GCPhysLast
555	\|\| GCPhysLast < pRam->GCPhys)
556	{
557	AssertMsgFailed(("No RAM range for %VGp-%VGp\n", GCPhys, GCPhysLast));
558	return VERR_INVALID_PARAMETER;
559	}
560
561	/*
562	* Update the requested flags.
563	*/
564	RTHCPHYS fFullMask = ~(RTHCPHYS)(MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_ROM \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_MMIO2)
565	\| fMask;
566	unsigned iPageEnd = (GCPhysLast - pRam->GCPhys + 1) >> PAGE_SHIFT;
567	unsigned iPage = (GCPhys - pRam->GCPhys) >> PAGE_SHIFT;
568	for ( ; iPage < iPageEnd; iPage++)
569	pRam->aHCPhys[iPage] = (pRam->aHCPhys[iPage] & fFullMask) \| fFlags;
570
571	return VINF_SUCCESS;
572	}
573
574
575	/**
576	* Sets the Address Gate 20 state.
577	*
578	* @param pVM VM handle.
579	* @param fEnable True if the gate should be enabled.
580	* False if the gate should be disabled.
581	*/
582	PGMDECL(void) PGMR3PhysSetA20(PVM pVM, bool fEnable)
583	{
584	LogFlow(("PGMR3PhysSetA20 %d (was %d)\n", fEnable, pVM->pgm.s.fA20Enabled));
585	if (pVM->pgm.s.fA20Enabled != (RTUINT)fEnable)
586	{
587	pVM->pgm.s.fA20Enabled = fEnable;
588	pVM->pgm.s.GCPhysA20Mask = ~(RTGCPHYS)(!fEnable << 20);
589	REMR3A20Set(pVM, fEnable);
590	}
591	}
592
593
594	/*
595	* PGMR3PhysReadByte/Word/Dword
596	* PGMR3PhysWriteByte/Word/Dword
597	*/
598
599	#define PGMPHYSFN_READNAME PGMR3PhysReadByte
600	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteByte
601	#define PGMPHYS_DATASIZE 1
602	#define PGMPHYS_DATATYPE uint8_t
603	#include "PGMPhys.h"
604
605	#define PGMPHYSFN_READNAME PGMR3PhysReadWord
606	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteWord
607	#define PGMPHYS_DATASIZE 2
608	#define PGMPHYS_DATATYPE uint16_t
609	#include "PGMPhys.h"
610
611	#define PGMPHYSFN_READNAME PGMR3PhysReadDword
612	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteDword
613	#define PGMPHYS_DATASIZE 4
614	#define PGMPHYS_DATATYPE uint32_t
615	#include "PGMPhys.h"

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source: vbox/trunk/src/VBox/VMM/PGMPhys.cpp@ 1138

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