PGMPhys.cpp@ 4394

Last change on this file since 4394 was 4387, checked in by vboxsync, 17 years ago
more grokable.
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1	/* $Id: PGMPhys.cpp 4387 2007-08-27 14:24:53Z vboxsync $ */
2	/** @file
3	* PGM - Page Manager and Monitor, Physical Memory Addressing.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 innotek 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
18
19	/*******************************************************************************
20	* Header Files *
21	*******************************************************************************/
22	#define LOG_GROUP LOG_GROUP_PGM
23	#include <VBox/pgm.h>
24	#include <VBox/cpum.h>
25	#include <VBox/iom.h>
26	#include <VBox/sup.h>
27	#include <VBox/mm.h>
28	#include <VBox/stam.h>
29	#include <VBox/rem.h>
30	#include <VBox/csam.h>
31	#include "PGMInternal.h"
32	#include <VBox/vm.h>
33	#include <VBox/dbg.h>
34	#include <VBox/param.h>
35	#include <VBox/err.h>
36	#include <iprt/assert.h>
37	#include <iprt/alloc.h>
38	#include <iprt/asm.h>
39	#include <VBox/log.h>
40	#include <iprt/thread.h>
41	#include <iprt/string.h>
42
43
44
45
46	/**
47	* Interface that the MMR3RamRegister(), MMR3RomRegister() and MMIO handler
48	* registration APIs calls to inform PGM about memory registrations.
49	*
50	* It registers the physical memory range with PGM. MM is responsible
51	* for the toplevel things - allocation and locking - while PGM is taking
52	* care of all the details and implements the physical address space virtualization.
53	*
54	* @returns VBox status.
55	* @param pVM The VM handle.
56	* @param pvRam HC virtual address of the RAM range. (page aligned)
57	* @param GCPhys GC physical address of the RAM range. (page aligned)
58	* @param cb Size of the RAM range. (page aligned)
59	* @param fFlags Flags, MM_RAM_*.
60	* @param paPages Pointer an array of physical page descriptors.
61	* @param pszDesc Description string.
62	*/
63	PGMR3DECL(int) PGMR3PhysRegister(PVM pVM, void pvRam, RTGCPHYS GCPhys, size_t cb, unsigned fFlags, const SUPPAGE paPages, const char *pszDesc)
64	{
65	/*
66	* Validate input.
67	* (Not so important because callers are only MMR3PhysRegister()
68	* and PGMR3HandlerPhysicalRegisterEx(), but anyway...)
69	*/
70	Log(("PGMR3PhysRegister %08X %x bytes flags %x %s\n", GCPhys, cb, fFlags, pszDesc));
71
72	Assert((fFlags & (MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_DYNAMIC_ALLOC)) \|\| paPages);
73	/Assert(!(fFlags & MM_RAM_FLAGS_RESERVED) \|\| !paPages);/
74	Assert((fFlags == (MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_MMIO)) \|\| (fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC) \|\| pvRam);
75	/Assert(!(fFlags & MM_RAM_FLAGS_RESERVED) \|\| !pvRam);/
76	Assert(!(fFlags & ~0xfff));
77	Assert(RT_ALIGN_Z(cb, PAGE_SIZE) == cb && cb);
78	Assert(RT_ALIGN_P(pvRam, PAGE_SIZE) == pvRam);
79	Assert(!(fFlags & ~(MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_ROM \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_MMIO2 \| MM_RAM_FLAGS_DYNAMIC_ALLOC)));
80	Assert(RT_ALIGN_T(GCPhys, PAGE_SIZE, RTGCPHYS) == GCPhys);
81	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
82	if (GCPhysLast < GCPhys)
83	{
84	AssertMsgFailed(("The range wraps! GCPhys=%VGp cb=%#x\n", GCPhys, cb));
85	return VERR_INVALID_PARAMETER;
86	}
87
88	/*
89	* Find range location and check for conflicts.
90	*/
91	PPGMRAMRANGE pPrev = NULL;
92	PPGMRAMRANGE pCur = pVM->pgm.s.pRamRangesHC;
93	while (pCur)
94	{
95	if (GCPhys <= pCur->GCPhysLast && GCPhysLast >= pCur->GCPhys)
96	{
97	AssertMsgFailed(("Conflict! This cannot happen!\n"));
98	return VERR_PGM_RAM_CONFLICT;
99	}
100	if (GCPhysLast < pCur->GCPhys)
101	break;
102
103	/* next */
104	pPrev = pCur;
105	pCur = pCur->pNextHC;
106	}
107
108	/*
109	* Allocate RAM range.
110	* Small ranges are allocated from the heap, big ones have separate mappings.
111	*/
112	size_t cbRam = RT_OFFSETOF(PGMRAMRANGE, aHCPhys[cb >> PAGE_SHIFT]);
113	PPGMRAMRANGE pNew;
114	RTGCPTR GCPtrNew;
115	int rc;
116	if (cbRam > PAGE_SIZE / 2)
117	{ /* large */
118	cbRam = RT_ALIGN_Z(cbRam, PAGE_SIZE);
119	rc = SUPPageAlloc(cbRam >> PAGE_SHIFT, (void **)&pNew);
120	if (VBOX_SUCCESS(rc))
121	{
122	rc = MMR3HyperMapHCRam(pVM, pNew, cbRam, true, pszDesc, &GCPtrNew);
123	if (VBOX_SUCCESS(rc))
124	{
125	Assert(MMHyperHC2GC(pVM, pNew) == GCPtrNew);
126	rc = MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
127	}
128	else
129	{
130	AssertMsgFailed(("MMR3HyperMapHCRam(,,%#x,,,) -> %Vrc\n", cbRam, rc));
131	SUPPageFree(pNew, cbRam >> PAGE_SHIFT);
132	}
133	}
134	else
135	AssertMsgFailed(("SUPPageAlloc(%#x,,) -> %Vrc\n", cbRam >> PAGE_SHIFT, rc));
136	}
137	else
138	{ /* small */
139	rc = MMHyperAlloc(pVM, cbRam, 16, MM_TAG_PGM, (void **)&pNew);
140	if (VBOX_SUCCESS(rc))
141	GCPtrNew = MMHyperHC2GC(pVM, pNew);
142	else
143	AssertMsgFailed(("MMHyperAlloc(,%#x,,,) -> %Vrc\n", cbRam, cb));
144	}
145	if (VBOX_SUCCESS(rc))
146	{
147	/*
148	* Initialize the range.
149	*/
150	pNew->pvHC = pvRam;
151	pNew->GCPhys = GCPhys;
152	pNew->GCPhysLast = GCPhysLast;
153	pNew->cb = cb;
154	pNew->fFlags = fFlags;
155	pNew->pavHCChunkHC = NULL;
156	pNew->pavHCChunkGC = 0;
157
158	unsigned iPage = cb >> PAGE_SHIFT;
159	if (paPages)
160	{
161	while (iPage-- > 0)
162	pNew->aHCPhys[iPage] = (paPages[iPage].Phys & X86_PTE_PAE_PG_MASK) \| fFlags;
163	}
164	else if (fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC)
165	{
166	/* Allocate memory for chunk to HC ptr lookup array. */
167	rc = MMHyperAlloc(pVM, (cb >> PGM_DYNAMIC_CHUNK_SHIFT) * sizeof(void ), 16, MM_TAG_PGM, (void *)&pNew->pavHCChunkHC);
168	AssertMsgReturn(rc == VINF_SUCCESS, ("MMHyperAlloc(,%#x,,,) -> %Vrc\n", cbRam, cb), rc);
169
170	pNew->pavHCChunkGC = MMHyperHC2GC(pVM, pNew->pavHCChunkHC);
171	Assert(pNew->pavHCChunkGC);
172
173	/* Physical memory will be allocated on demand. */
174	while (iPage-- > 0)
175	pNew->aHCPhys[iPage] = fFlags;
176	}
177	else
178	{
179	Assert(fFlags == (MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_MMIO));
180	RTHCPHYS HCPhysDummyPage = (MMR3PageDummyHCPhys(pVM) & X86_PTE_PAE_PG_MASK) \| fFlags;
181	while (iPage-- > 0)
182	pNew->aHCPhys[iPage] = HCPhysDummyPage;
183	}
184
185	/*
186	* Insert the new RAM range.
187	*/
188	pgmLock(pVM);
189	pNew->pNextHC = pCur;
190	pNew->pNextGC = pCur ? MMHyperHC2GC(pVM, pCur) : 0;
191	if (pPrev)
192	{
193	pPrev->pNextHC = pNew;
194	pPrev->pNextGC = GCPtrNew;
195	}
196	else
197	{
198	pVM->pgm.s.pRamRangesHC = pNew;
199	pVM->pgm.s.pRamRangesGC = GCPtrNew;
200	}
201	pgmUnlock(pVM);
202	}
203	return rc;
204	}
205
206
207	/**
208	* Register a chunk of a the physical memory range with PGM. MM is responsible
209	* for the toplevel things - allocation and locking - while PGM is taking
210	* care of all the details and implements the physical address space virtualization.
211	*
212	*
213	* @returns VBox status.
214	* @param pVM The VM handle.
215	* @param pvRam HC virtual address of the RAM range. (page aligned)
216	* @param GCPhys GC physical address of the RAM range. (page aligned)
217	* @param cb Size of the RAM range. (page aligned)
218	* @param fFlags Flags, MM_RAM_*.
219	* @param paPages Pointer an array of physical page descriptors.
220	* @param pszDesc Description string.
221	*/
222	PGMR3DECL(int) PGMR3PhysRegisterChunk(PVM pVM, void pvRam, RTGCPHYS GCPhys, size_t cb, unsigned fFlags, const SUPPAGE paPages, const char *pszDesc)
223	{
224	#ifdef PGM_DYNAMIC_RAM_ALLOC
225	NOREF(pszDesc);
226
227	/*
228	* Validate input.
229	* (Not so important because callers are only MMR3PhysRegister()
230	* and PGMR3HandlerPhysicalRegisterEx(), but anyway...)
231	*/
232	Log(("PGMR3PhysRegisterChunk %08X %x bytes flags %x %s\n", GCPhys, cb, fFlags, pszDesc));
233
234	Assert(paPages);
235	Assert(pvRam);
236	Assert(!(fFlags & ~0xfff));
237	Assert(RT_ALIGN_Z(cb, PAGE_SIZE) == cb && cb);
238	Assert(RT_ALIGN_P(pvRam, PAGE_SIZE) == pvRam);
239	Assert(!(fFlags & ~(MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_ROM \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_MMIO2 \| MM_RAM_FLAGS_DYNAMIC_ALLOC)));
240	Assert(RT_ALIGN_T(GCPhys, PAGE_SIZE, RTGCPHYS) == GCPhys);
241	Assert(VM_IS_EMT(pVM));
242	Assert(!(GCPhys & PGM_DYNAMIC_CHUNK_OFFSET_MASK));
243	Assert(cb == PGM_DYNAMIC_CHUNK_SIZE);
244
245	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
246	if (GCPhysLast < GCPhys)
247	{
248	AssertMsgFailed(("The range wraps! GCPhys=%VGp cb=%#x\n", GCPhys, cb));
249	return VERR_INVALID_PARAMETER;
250	}
251
252	/*
253	* Find existing range location.
254	*/
255	PPGMRAMRANGE pRam = CTXSUFF(pVM->pgm.s.pRamRanges);
256	while (pRam)
257	{
258	RTGCPHYS off = GCPhys - pRam->GCPhys;
259	if ( off < pRam->cb
260	&& (pRam->fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC))
261	break;
262
263	pRam = CTXSUFF(pRam->pNext);
264	}
265	AssertReturn(pRam, VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS);
266
267	unsigned off = (GCPhys - pRam->GCPhys) >> PAGE_SHIFT;
268	unsigned iPage = cb >> PAGE_SHIFT;
269	if (paPages)
270	{
271	while (iPage-- > 0)
272	pRam->aHCPhys[off + iPage] = (paPages[iPage].Phys & X86_PTE_PAE_PG_MASK) \| fFlags;
273	}
274	off >>= (PGM_DYNAMIC_CHUNK_SHIFT - PAGE_SHIFT);
275	pRam->pavHCChunkHC[off] = pvRam;
276
277	/* Notify the recompiler. */
278	REMR3NotifyPhysRamChunkRegister(pVM, GCPhys, PGM_DYNAMIC_CHUNK_SIZE, (RTHCUINTPTR)pvRam, fFlags);
279
280	return VINF_SUCCESS;
281	#else /* !PGM_DYNAMIC_RAM_ALLOC */
282	AssertReleaseMsgFailed(("Shouldn't ever get here when PGM_DYNAMIC_RAM_ALLOC isn't defined!\n"));
283	return VERR_INTERNAL_ERROR;
284	#endif /* !PGM_DYNAMIC_RAM_ALLOC */
285	}
286
287
288	/**
289	* Allocate missing physical pages for an existing guest RAM range.
290	*
291	* @returns VBox status.
292	* @param pVM The VM handle.
293	* @param GCPhys GC physical address of the RAM range. (page aligned)
294	*/
295	PGMR3DECL(int) PGM3PhysGrowRange(PVM pVM, RTGCPHYS GCPhys)
296	{
297	/*
298	* Walk range list.
299	*/
300	pgmLock(pVM);
301
302	PPGMRAMRANGE pRam = CTXSUFF(pVM->pgm.s.pRamRanges);
303	while (pRam)
304	{
305	RTGCPHYS off = GCPhys - pRam->GCPhys;
306	if ( off < pRam->cb
307	&& (pRam->fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC))
308	{
309	bool fRangeExists = false;
310	unsigned off = (GCPhys - pRam->GCPhys) >> PGM_DYNAMIC_CHUNK_SHIFT;
311
312	/** @note A request made from another thread may end up in EMT after somebody else has already allocated the range. */
313	if (pRam->pavHCChunkHC[off])
314	fRangeExists = true;
315
316	pgmUnlock(pVM);
317	if (fRangeExists)
318	return VINF_SUCCESS;
319	return pgmr3PhysGrowRange(pVM, GCPhys);
320	}
321
322	pRam = CTXSUFF(pRam->pNext);
323	}
324	pgmUnlock(pVM);
325	return VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
326	}
327
328
329	/**
330	* Allocate missing physical pages for an existing guest RAM range.
331	*
332	* @returns VBox status.
333	* @param pVM The VM handle.
334	* @param pRamRange RAM range
335	* @param GCPhys GC physical address of the RAM range. (page aligned)
336	*/
337	int pgmr3PhysGrowRange(PVM pVM, RTGCPHYS GCPhys)
338	{
339	void *pvRam;
340	int rc;
341
342	/* We must execute this function in the EMT thread, otherwise we'll run into problems. */
343	if (!VM_IS_EMT(pVM))
344	{
345	PVMREQ pReq;
346
347	AssertMsg(!PDMCritSectIsOwner(&pVM->pgm.s.CritSect), ("We own the PGM lock -> deadlock danger!!\n"));
348
349	rc = VMR3ReqCall(pVM, &pReq, RT_INDEFINITE_WAIT, (PFNRT)PGM3PhysGrowRange, 2, pVM, GCPhys);
350	if (VBOX_SUCCESS(rc))
351	{
352	rc = pReq->iStatus;
353	VMR3ReqFree(pReq);
354	}
355	return rc;
356	}
357
358	/* Round down to chunk boundary */
359	GCPhys = GCPhys & PGM_DYNAMIC_CHUNK_BASE_MASK;
360
361	STAM_COUNTER_INC(&pVM->pgm.s.StatDynRamGrow);
362	STAM_COUNTER_ADD(&pVM->pgm.s.StatDynRamTotal, PGM_DYNAMIC_CHUNK_SIZE/(1024*1024));
363
364	Log(("pgmr3PhysGrowRange: allocate chunk of size 0x%X at %VGp\n", PGM_DYNAMIC_CHUNK_SIZE, GCPhys));
365
366	unsigned cPages = PGM_DYNAMIC_CHUNK_SIZE >> PAGE_SHIFT;
367	rc = SUPPageAlloc(cPages, &pvRam);
368	if (VBOX_SUCCESS(rc))
369	{
370	VMSTATE enmVMState = VMR3GetState(pVM);
371
372	rc = MMR3PhysRegisterEx(pVM, pvRam, GCPhys, PGM_DYNAMIC_CHUNK_SIZE, 0, MM_PHYS_TYPE_DYNALLOC_CHUNK, "Main Memory");
373	if ( VBOX_SUCCESS(rc)
374	\|\| enmVMState != VMSTATE_RUNNING)
375	{
376	if (VBOX_FAILURE(rc))
377	{
378	AssertMsgFailed(("Out of memory while trying to allocate a guest RAM chunk at %VGp!\n", GCPhys));
379	LogRel(("PGM: Out of memory while trying to allocate a guest RAM chunk at %VGp (VMstate=%s)!\n", GCPhys, VMR3GetStateName(enmVMState)));
380	}
381	return rc;
382	}
383
384	SUPPageFree(pvRam, cPages);
385
386	LogRel(("pgmr3PhysGrowRange: out of memory. pause until the user resumes execution.\n"));
387
388	/* Pause first, then inform Main. */
389	rc = VMR3SuspendNoSave(pVM);
390	AssertRC(rc);
391
392	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.");
393
394	/* Wait for resume event; will only return in that case. If the VM is stopped, the EMT thread will be destroyed. */
395	rc = VMR3WaitForResume(pVM);
396
397	/* Retry */
398	LogRel(("pgmr3PhysGrowRange: VM execution resumed -> retry.\n"));
399	return pgmr3PhysGrowRange(pVM, GCPhys);
400	}
401	return rc;
402	}
403
404
405	/**
406	* Interface MMIO handler relocation calls.
407	*
408	* It relocates an existing physical memory range with PGM.
409	*
410	* @returns VBox status.
411	* @param pVM The VM handle.
412	* @param GCPhysOld Previous GC physical address of the RAM range. (page aligned)
413	* @param GCPhysNew New GC physical address of the RAM range. (page aligned)
414	* @param cb Size of the RAM range. (page aligned)
415	*/
416	PGMR3DECL(int) PGMR3PhysRelocate(PVM pVM, RTGCPHYS GCPhysOld, RTGCPHYS GCPhysNew, size_t cb)
417	{
418	/*
419	* Validate input.
420	* (Not so important because callers are only MMR3PhysRelocate(),
421	* but anyway...)
422	*/
423	Log(("PGMR3PhysRelocate Old %VGp New %VGp (%#x bytes)\n", GCPhysOld, GCPhysNew, cb));
424
425	Assert(RT_ALIGN_Z(cb, PAGE_SIZE) == cb && cb);
426	Assert(RT_ALIGN_T(GCPhysOld, PAGE_SIZE, RTGCPHYS) == GCPhysOld);
427	Assert(RT_ALIGN_T(GCPhysNew, PAGE_SIZE, RTGCPHYS) == GCPhysNew);
428	RTGCPHYS GCPhysLast;
429	GCPhysLast = GCPhysOld + (cb - 1);
430	if (GCPhysLast < GCPhysOld)
431	{
432	AssertMsgFailed(("The old range wraps! GCPhys=%VGp cb=%#x\n", GCPhysOld, cb));
433	return VERR_INVALID_PARAMETER;
434	}
435	GCPhysLast = GCPhysNew + (cb - 1);
436	if (GCPhysLast < GCPhysNew)
437	{
438	AssertMsgFailed(("The new range wraps! GCPhys=%VGp cb=%#x\n", GCPhysNew, cb));
439	return VERR_INVALID_PARAMETER;
440	}
441
442	/*
443	* Find and remove old range location.
444	*/
445	pgmLock(pVM);
446	PPGMRAMRANGE pPrev = NULL;
447	PPGMRAMRANGE pCur = pVM->pgm.s.pRamRangesHC;
448	while (pCur)
449	{
450	if (pCur->GCPhys == GCPhysOld && pCur->cb == cb)
451	break;
452
453	/* next */
454	pPrev = pCur;
455	pCur = pCur->pNextHC;
456	}
457	if (pPrev)
458	{
459	pPrev->pNextHC = pCur->pNextHC;
460	pPrev->pNextGC = pCur->pNextGC;
461	}
462	else
463	{
464	pVM->pgm.s.pRamRangesHC = pCur->pNextHC;
465	pVM->pgm.s.pRamRangesGC = pCur->pNextGC;
466	}
467
468	/*
469	* Update the range.
470	*/
471	pCur->GCPhys = GCPhysNew;
472	pCur->GCPhysLast= GCPhysLast;
473	PPGMRAMRANGE pNew = pCur;
474
475	/*
476	* Find range location and check for conflicts.
477	*/
478	pPrev = NULL;
479	pCur = pVM->pgm.s.pRamRangesHC;
480	while (pCur)
481	{
482	if (GCPhysNew <= pCur->GCPhysLast && GCPhysLast >= pCur->GCPhys)
483	{
484	AssertMsgFailed(("Conflict! This cannot happen!\n"));
485	pgmUnlock(pVM);
486	return VERR_PGM_RAM_CONFLICT;
487	}
488	if (GCPhysLast < pCur->GCPhys)
489	break;
490
491	/* next */
492	pPrev = pCur;
493	pCur = pCur->pNextHC;
494	}
495
496	/*
497	* Reinsert the RAM range.
498	*/
499	pNew->pNextHC = pCur;
500	pNew->pNextGC = pCur ? MMHyperHC2GC(pVM, pCur) : 0;
501	if (pPrev)
502	{
503	pPrev->pNextHC = pNew;
504	pPrev->pNextGC = MMHyperHC2GC(pVM, pNew);
505	}
506	else
507	{
508	pVM->pgm.s.pRamRangesHC = pNew;
509	pVM->pgm.s.pRamRangesGC = MMHyperHC2GC(pVM, pNew);
510	}
511
512	pgmUnlock(pVM);
513	return VINF_SUCCESS;
514	}
515
516
517	/**
518	* Interface MMR3RomRegister() and MMR3PhysReserve calls to update the
519	* flags of existing RAM ranges.
520	*
521	* @returns VBox status.
522	* @param pVM The VM handle.
523	* @param GCPhys GC physical address of the RAM range. (page aligned)
524	* @param cb Size of the RAM range. (page aligned)
525	* @param fFlags The Or flags, MM_RAM_* \#defines.
526	* @param fMask The and mask for the flags.
527	*/
528	PGMR3DECL(int) PGMR3PhysSetFlags(PVM pVM, RTGCPHYS GCPhys, size_t cb, unsigned fFlags, unsigned fMask)
529	{
530	Log(("PGMR3PhysSetFlags %08X %x %x %x\n", GCPhys, cb, fFlags, fMask));
531
532	/*
533	* Validate input.
534	* (Not so important because caller is always MMR3RomRegister() and MMR3PhysReserve(), but anyway...)
535	*/
536	Assert(!(fFlags & ~(MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_ROM \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_MMIO2)));
537	Assert(RT_ALIGN_Z(cb, PAGE_SIZE) == cb && cb);
538	Assert(RT_ALIGN_T(GCPhys, PAGE_SIZE, RTGCPHYS) == GCPhys);
539	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
540	AssertReturn(GCPhysLast > GCPhys, VERR_INVALID_PARAMETER);
541
542	/*
543	* Lookup the range.
544	*/
545	PPGMRAMRANGE pRam = CTXSUFF(pVM->pgm.s.pRamRanges);
546	while (pRam && GCPhys > pRam->GCPhysLast)
547	pRam = CTXSUFF(pRam->pNext);
548	if ( !pRam
549	\|\| GCPhys > pRam->GCPhysLast
550	\|\| GCPhysLast < pRam->GCPhys)
551	{
552	AssertMsgFailed(("No RAM range for %VGp-%VGp\n", GCPhys, GCPhysLast));
553	return VERR_INVALID_PARAMETER;
554	}
555
556	/*
557	* Update the requested flags.
558	*/
559	RTHCPHYS fFullMask = ~(RTHCPHYS)(MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_ROM \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_MMIO2)
560	\| fMask;
561	unsigned iPageEnd = (GCPhysLast - pRam->GCPhys + 1) >> PAGE_SHIFT;
562	unsigned iPage = (GCPhys - pRam->GCPhys) >> PAGE_SHIFT;
563	for ( ; iPage < iPageEnd; iPage++)
564	pRam->aHCPhys[iPage] = (pRam->aHCPhys[iPage] & fFullMask) \| fFlags;
565
566	return VINF_SUCCESS;
567	}
568
569
570	/**
571	* Sets the Address Gate 20 state.
572	*
573	* @param pVM VM handle.
574	* @param fEnable True if the gate should be enabled.
575	* False if the gate should be disabled.
576	*/
577	PGMDECL(void) PGMR3PhysSetA20(PVM pVM, bool fEnable)
578	{
579	LogFlow(("PGMR3PhysSetA20 %d (was %d)\n", fEnable, pVM->pgm.s.fA20Enabled));
580	if (pVM->pgm.s.fA20Enabled != (RTUINT)fEnable)
581	{
582	pVM->pgm.s.fA20Enabled = fEnable;
583	pVM->pgm.s.GCPhysA20Mask = ~(RTGCPHYS)(!fEnable << 20);
584	REMR3A20Set(pVM, fEnable);
585	}
586	}
587
588
589	/*
590	* PGMR3PhysReadByte/Word/Dword
591	* PGMR3PhysWriteByte/Word/Dword
592	*/
593
594	#define PGMPHYSFN_READNAME PGMR3PhysReadByte
595	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteByte
596	#define PGMPHYS_DATASIZE 1
597	#define PGMPHYS_DATATYPE uint8_t
598	#include "PGMPhys.h"
599
600	#define PGMPHYSFN_READNAME PGMR3PhysReadWord
601	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteWord
602	#define PGMPHYS_DATASIZE 2
603	#define PGMPHYS_DATATYPE uint16_t
604	#include "PGMPhys.h"
605
606	#define PGMPHYSFN_READNAME PGMR3PhysReadDword
607	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteDword
608	#define PGMPHYS_DATASIZE 4
609	#define PGMPHYS_DATATYPE uint32_t
610	#include "PGMPhys.h"

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source: vbox/trunk/src/VBox/VMM/PGMPhys.cpp@ 4394

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