IOMAll.cpp@ 30045

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1	/* $Id: IOMAll.cpp 28800 2010-04-27 08:22:32Z vboxsync $ */
2	/** @file
3	* IOM - Input / Output Monitor - Any Context.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Oracle Corporation
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 (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18	/*******************************************************************************
19	* Header Files *
20	*******************************************************************************/
21	#define LOG_GROUP LOG_GROUP_IOM
22	#include <VBox/iom.h>
23	#include <VBox/mm.h>
24	#include <VBox/param.h>
25	#include "IOMInternal.h"
26	#include <VBox/vm.h>
27	#include <VBox/vmm.h>
28	#include <VBox/selm.h>
29	#include <VBox/trpm.h>
30	#include <VBox/pdmdev.h>
31	#include <VBox/pgm.h>
32	#include <VBox/cpum.h>
33	#include <VBox/err.h>
34	#include <VBox/log.h>
35	#include <iprt/assert.h>
36
37
38
39	/**
40	* Try take the EMT/IOM lock, wait in ring-3 return VERR_SEM_BUSY in R0/RC.
41	*
42	* @retval VINF_SUCCESS on success (always in ring-3).
43	* @retval VERR_SEM_BUSY in RC and R0 if the semaphore is busy.
44	*
45	* @param pVM VM handle.
46	*/
47	int iomLock(PVM pVM)
48	{
49	Assert(pVM->cCpus == 1 \|\| !PGMIsLockOwner(pVM));
50	int rc = PDMCritSectEnter(&pVM->iom.s.EmtLock, VERR_SEM_BUSY);
51	return rc;
52	}
53
54
55	/**
56	* Try take the EMT/IOM lock, no waiting.
57	*
58	* @retval VINF_SUCCESS on success.
59	* @retval VERR_SEM_BUSY if busy.
60	*
61	* @param pVM VM handle.
62	*/
63	int iomTryLock(PVM pVM)
64	{
65	int rc = PDMCritSectTryEnter(&pVM->iom.s.EmtLock);
66	return rc;
67	}
68
69
70	/**
71	* Release EMT/IOM lock.
72	*
73	* @param pVM VM handle.
74	*/
75	void iomUnlock(PVM pVM)
76	{
77	PDMCritSectLeave(&pVM->iom.s.EmtLock);
78	}
79
80
81	/**
82	* Check if this VCPU currently owns the IOM lock.
83	*
84	* @returns bool owner/not owner
85	* @param pVM The VM to operate on.
86	*/
87	VMMDECL(bool) IOMIsLockOwner(PVM pVM)
88	{
89	return PDMCritSectIsOwner(&pVM->iom.s.EmtLock);
90	}
91
92	/**
93	* Returns the contents of register or immediate data of instruction's parameter.
94	*
95	* @returns true on success.
96	*
97	* @todo Get rid of this code. Use DISQueryParamVal instead
98	*
99	* @param pCpu Pointer to current disassembler context.
100	* @param pParam Pointer to parameter of instruction to proccess.
101	* @param pRegFrame Pointer to CPUMCTXCORE guest structure.
102	* @param pu64Data Where to store retrieved data.
103	* @param pcbSize Where to store the size of data (1, 2, 4, 8).
104	*/
105	bool iomGetRegImmData(PDISCPUSTATE pCpu, PCOP_PARAMETER pParam, PCPUMCTXCORE pRegFrame, uint64_t pu64Data, unsigned pcbSize)
106	{
107	if (pParam->flags & (USE_BASE \| USE_INDEX \| USE_SCALE \| USE_DISPLACEMENT8 \| USE_DISPLACEMENT16 \| USE_DISPLACEMENT32))
108	{
109	*pcbSize = 0;
110	*pu64Data = 0;
111	return false;
112	}
113
114	/* divide and conquer */
115	if (pParam->flags & (USE_REG_GEN64 \| USE_REG_GEN32 \| USE_REG_GEN16 \| USE_REG_GEN8))
116	{
117	if (pParam->flags & USE_REG_GEN32)
118	{
119	*pcbSize = 4;
120	DISFetchReg32(pRegFrame, pParam->base.reg_gen, (uint32_t *)pu64Data);
121	return true;
122	}
123
124	if (pParam->flags & USE_REG_GEN16)
125	{
126	*pcbSize = 2;
127	DISFetchReg16(pRegFrame, pParam->base.reg_gen, (uint16_t *)pu64Data);
128	return true;
129	}
130
131	if (pParam->flags & USE_REG_GEN8)
132	{
133	*pcbSize = 1;
134	DISFetchReg8(pRegFrame, pParam->base.reg_gen, (uint8_t *)pu64Data);
135	return true;
136	}
137
138	Assert(pParam->flags & USE_REG_GEN64);
139	*pcbSize = 8;
140	DISFetchReg64(pRegFrame, pParam->base.reg_gen, pu64Data);
141	return true;
142	}
143	else
144	{
145	if (pParam->flags & (USE_IMMEDIATE64 \| USE_IMMEDIATE64_SX8))
146	{
147	*pcbSize = 8;
148	*pu64Data = pParam->parval;
149	return true;
150	}
151
152	if (pParam->flags & (USE_IMMEDIATE32 \| USE_IMMEDIATE32_SX8))
153	{
154	*pcbSize = 4;
155	*pu64Data = (uint32_t)pParam->parval;
156	return true;
157	}
158
159	if (pParam->flags & (USE_IMMEDIATE16 \| USE_IMMEDIATE16_SX8))
160	{
161	*pcbSize = 2;
162	*pu64Data = (uint16_t)pParam->parval;
163	return true;
164	}
165
166	if (pParam->flags & USE_IMMEDIATE8)
167	{
168	*pcbSize = 1;
169	*pu64Data = (uint8_t)pParam->parval;
170	return true;
171	}
172
173	if (pParam->flags & USE_REG_SEG)
174	{
175	*pcbSize = 2;
176	DISFetchRegSeg(pRegFrame, pParam->base.reg_seg, (RTSEL *)pu64Data);
177	return true;
178	} /* Else - error. */
179
180	AssertFailed();
181	*pcbSize = 0;
182	*pu64Data = 0;
183	return false;
184	}
185	}
186
187
188	/**
189	* Saves data to 8/16/32 general purpose or segment register defined by
190	* instruction's parameter.
191	*
192	* @returns true on success.
193	* @param pCpu Pointer to current disassembler context.
194	* @param pParam Pointer to parameter of instruction to proccess.
195	* @param pRegFrame Pointer to CPUMCTXCORE guest structure.
196	* @param u64Data 8/16/32/64 bit data to store.
197	*/
198	bool iomSaveDataToReg(PDISCPUSTATE pCpu, PCOP_PARAMETER pParam, PCPUMCTXCORE pRegFrame, uint64_t u64Data)
199	{
200	if (pParam->flags & (USE_BASE \| USE_INDEX \| USE_SCALE \| USE_DISPLACEMENT8 \| USE_DISPLACEMENT16 \| USE_DISPLACEMENT32 \| USE_DISPLACEMENT64 \| USE_IMMEDIATE8 \| USE_IMMEDIATE16 \| USE_IMMEDIATE32 \| USE_IMMEDIATE32_SX8 \| USE_IMMEDIATE16_SX8))
201	{
202	return false;
203	}
204
205	if (pParam->flags & USE_REG_GEN32)
206	{
207	DISWriteReg32(pRegFrame, pParam->base.reg_gen, (uint32_t)u64Data);
208	return true;
209	}
210
211	if (pParam->flags & USE_REG_GEN64)
212	{
213	DISWriteReg64(pRegFrame, pParam->base.reg_gen, u64Data);
214	return true;
215	}
216
217	if (pParam->flags & USE_REG_GEN16)
218	{
219	DISWriteReg16(pRegFrame, pParam->base.reg_gen, (uint16_t)u64Data);
220	return true;
221	}
222
223	if (pParam->flags & USE_REG_GEN8)
224	{
225	DISWriteReg8(pRegFrame, pParam->base.reg_gen, (uint8_t)u64Data);
226	return true;
227	}
228
229	if (pParam->flags & USE_REG_SEG)
230	{
231	DISWriteRegSeg(pRegFrame, pParam->base.reg_seg, (RTSEL)u64Data);
232	return true;
233	}
234
235	/* Else - error. */
236	return false;
237	}
238
239
240	//#undef LOG_GROUP
241	//#define LOG_GROUP LOG_GROUP_IOM_IOPORT
242
243	/**
244	* Reads an I/O port register.
245	*
246	* @returns Strict VBox status code. Informational status codes other than the one documented
247	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
248	* @retval VINF_SUCCESS Success.
249	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
250	* status code must be passed on to EM.
251	* @retval VINF_IOM_HC_IOPORT_READ Defer the read to ring-3. (R0/GC only)
252	*
253	* @param pVM VM handle.
254	* @param Port The port to read.
255	* @param pu32Value Where to store the value read.
256	* @param cbValue The size of the register to read in bytes. 1, 2 or 4 bytes.
257	*/
258	VMMDECL(VBOXSTRICTRC) IOMIOPortRead(PVM pVM, RTIOPORT Port, uint32_t *pu32Value, size_t cbValue)
259	{
260	/* Take the IOM lock before performing any device I/O. */
261	int rc2 = iomLock(pVM);
262	#ifndef IN_RING3
263	if (rc2 == VERR_SEM_BUSY)
264	return VINF_IOM_HC_IOPORT_READ;
265	#endif
266	AssertRC(rc2);
267
268	#ifdef VBOX_WITH_STATISTICS
269	/*
270	* Get the statistics record.
271	*/
272	PIOMIOPORTSTATS pStats = pVM->iom.s.CTX_SUFF(pStatsLastRead);
273	if (!pStats \|\| pStats->Core.Key != Port)
274	{
275	pStats = (PIOMIOPORTSTATS)RTAvloIOPortGet(&pVM->iom.s.CTX_SUFF(pTrees)->IOPortStatTree, Port);
276	if (pStats)
277	pVM->iom.s.CTX_SUFF(pStatsLastRead) = pStats;
278	}
279	#endif
280
281	/*
282	* Get handler for current context.
283	*/
284	CTX_SUFF(PIOMIOPORTRANGE) pRange = pVM->iom.s.CTX_SUFF(pRangeLastRead);
285	if ( !pRange
286	\|\| (unsigned)Port - (unsigned)pRange->Port >= (unsigned)pRange->cPorts)
287	{
288	pRange = iomIOPortGetRange(&pVM->iom.s, Port);
289	if (pRange)
290	pVM->iom.s.CTX_SUFF(pRangeLastRead) = pRange;
291	}
292	MMHYPER_RC_ASSERT_RCPTR(pVM, pRange);
293	if (pRange)
294	{
295	/*
296	* Found a range, get the data in case we leave the IOM lock.
297	*/
298	PFNIOMIOPORTIN pfnInCallback = pRange->pfnInCallback;
299	#ifndef IN_RING3
300	if (!pfnInCallback)
301	{
302	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->InRZToR3); });
303	iomUnlock(pVM);
304	return VINF_IOM_HC_IOPORT_READ;
305	}
306	#endif
307	void *pvUser = pRange->pvUser;
308	PPDMDEVINS pDevIns = pRange->pDevIns;
309	PPDMCRITSECT pCritSect = pDevIns->CTX_SUFF(pCritSect);
310
311	/*
312	* Call the device - 4 variations.
313	*/
314	VBOXSTRICTRC rcStrict;
315	if (pCritSect)
316	{
317	iomUnlock(pVM);
318	rcStrict = PDMCritSectEnter(pCritSect, VINF_IOM_HC_IOPORT_READ);
319	if (rcStrict != VINF_SUCCESS)
320	{
321	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->InRZToR3); });
322	return rcStrict;
323	}
324	#ifdef VBOX_WITH_STATISTICS
325	if (pStats)
326	{
327	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfIn), a);
328	rcStrict = pfnInCallback(pDevIns, pvUser, Port, pu32Value, (unsigned)cbValue);
329	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfIn), a);
330	}
331	else
332	#endif
333	rcStrict = pfnInCallback(pDevIns, pvUser, Port, pu32Value, (unsigned)cbValue);
334	PDMCritSectLeave(pCritSect);
335	}
336	else
337	{
338	#ifdef VBOX_WITH_STATISTICS
339	if (pStats)
340	{
341	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfIn), a);
342	rcStrict = pfnInCallback(pDevIns, pvUser, Port, pu32Value, (unsigned)cbValue);
343	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfIn), a);
344	}
345	else
346	#endif
347	rcStrict = pfnInCallback(pDevIns, pvUser, Port, pu32Value, (unsigned)cbValue);
348	}
349	#ifdef VBOX_WITH_STATISTICS
350	if (rcStrict == VINF_SUCCESS && pStats)
351	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(In));
352	# ifndef IN_RING3
353	else if (rcStrict == VINF_IOM_HC_IOPORT_READ && pStats)
354	STAM_COUNTER_INC(&pStats->InRZToR3);
355	# endif
356	#endif
357	if (rcStrict == VERR_IOM_IOPORT_UNUSED)
358	{
359	/* make return value */
360	rcStrict = VINF_SUCCESS;
361	switch (cbValue)
362	{
363	case 1: (uint8_t )pu32Value = 0xff; break;
364	case 2: (uint16_t )pu32Value = 0xffff; break;
365	case 4: (uint32_t )pu32Value = UINT32_C(0xffffffff); break;
366	default:
367	AssertMsgFailed(("Invalid I/O port size %d. Port=%d\n", cbValue, Port));
368	if (!pCritSect)
369	iomUnlock(pVM);
370	return VERR_IOM_INVALID_IOPORT_SIZE;
371	}
372	}
373	Log3(("IOMIOPortRead: Port=%RTiop pu32=%08RX32 cb=%d rc=%Rrc\n", Port, pu32Value, cbValue, VBOXSTRICTRC_VAL(rcStrict)));
374	if (!pCritSect)
375	iomUnlock(pVM);
376	return rcStrict;
377	}
378
379	#ifndef IN_RING3
380	/*
381	* Handler in ring-3?
382	*/
383	PIOMIOPORTRANGER3 pRangeR3 = iomIOPortGetRangeR3(&pVM->iom.s, Port);
384	if (pRangeR3)
385	{
386	# ifdef VBOX_WITH_STATISTICS
387	if (pStats)
388	STAM_COUNTER_INC(&pStats->InRZToR3);
389	# endif
390	iomUnlock(pVM);
391	return VINF_IOM_HC_IOPORT_READ;
392	}
393	#endif
394
395	/*
396	* Ok, no handler for this port.
397	*/
398	#ifdef VBOX_WITH_STATISTICS
399	if (pStats)
400	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(In));
401	else
402	{
403	# ifndef IN_RING3
404	/* Ring-3 will have to create the statistics record. */
405	iomUnlock(pVM);
406	return VINF_IOM_HC_IOPORT_READ;
407	# else
408	pStats = iomR3IOPortStatsCreate(pVM, Port, NULL);
409	if (pStats)
410	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(In));
411	# endif
412	}
413	#endif
414
415	/* make return value */
416	switch (cbValue)
417	{
418	case 1: (uint8_t )pu32Value = 0xff; break;
419	case 2: (uint16_t )pu32Value = 0xffff; break;
420	case 4: (uint32_t )pu32Value = UINT32_C(0xffffffff); break;
421	default:
422	AssertMsgFailed(("Invalid I/O port size %d. Port=%d\n", cbValue, Port));
423	iomUnlock(pVM);
424	return VERR_IOM_INVALID_IOPORT_SIZE;
425	}
426	Log3(("IOMIOPortRead: Port=%RTiop pu32=%08RX32 cb=%d rc=VINF_SUCCESS\n", Port, pu32Value, cbValue));
427	iomUnlock(pVM);
428	return VINF_SUCCESS;
429	}
430
431
432	/**
433	* Reads the string buffer of an I/O port register.
434	*
435	* @returns Strict VBox status code. Informational status codes other than the one documented
436	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
437	* @retval VINF_SUCCESS Success.
438	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
439	* status code must be passed on to EM.
440	* @retval VINF_IOM_HC_IOPORT_READ Defer the read to ring-3. (R0/GC only)
441	*
442	* @param pVM VM handle.
443	* @param Port The port to read.
444	* @param pGCPtrDst Pointer to the destination buffer (GC, incremented appropriately).
445	* @param pcTransfers Pointer to the number of transfer units to read, on return remaining transfer units.
446	* @param cb Size of the transfer unit (1, 2 or 4 bytes).
447	*/
448	VMMDECL(VBOXSTRICTRC) IOMIOPortReadString(PVM pVM, RTIOPORT Port, PRTGCPTR pGCPtrDst, PRTGCUINTREG pcTransfers, unsigned cb)
449	{
450	/* Take the IOM lock before performing any device I/O. */
451	int rc2 = iomLock(pVM);
452	#ifndef IN_RING3
453	if (rc2 == VERR_SEM_BUSY)
454	return VINF_IOM_HC_IOPORT_READ;
455	#endif
456	AssertRC(rc2);
457
458	#ifdef LOG_ENABLED
459	const RTGCUINTREG cTransfers = *pcTransfers;
460	#endif
461	#ifdef VBOX_WITH_STATISTICS
462	/*
463	* Get the statistics record.
464	*/
465	PIOMIOPORTSTATS pStats = pVM->iom.s.CTX_SUFF(pStatsLastRead);
466	if (!pStats \|\| pStats->Core.Key != Port)
467	{
468	pStats = (PIOMIOPORTSTATS)RTAvloIOPortGet(&pVM->iom.s.CTX_SUFF(pTrees)->IOPortStatTree, Port);
469	if (pStats)
470	pVM->iom.s.CTX_SUFF(pStatsLastRead) = pStats;
471	}
472	#endif
473
474	/*
475	* Get handler for current context.
476	*/
477	CTX_SUFF(PIOMIOPORTRANGE) pRange = pVM->iom.s.CTX_SUFF(pRangeLastRead);
478	if ( !pRange
479	\|\| (unsigned)Port - (unsigned)pRange->Port >= (unsigned)pRange->cPorts)
480	{
481	pRange = iomIOPortGetRange(&pVM->iom.s, Port);
482	if (pRange)
483	pVM->iom.s.CTX_SUFF(pRangeLastRead) = pRange;
484	}
485	MMHYPER_RC_ASSERT_RCPTR(pVM, pRange);
486	if (pRange)
487	{
488	/*
489	* Found a range.
490	*/
491	PFNIOMIOPORTINSTRING pfnInStrCallback = pRange->pfnInStrCallback;
492	#ifndef IN_RING3
493	if (!pfnInStrCallback)
494	{
495	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->InRZToR3); });
496	iomUnlock(pVM);
497	return VINF_IOM_HC_IOPORT_READ;
498	}
499	#endif
500	void *pvUser = pRange->pvUser;
501	PPDMDEVINS pDevIns = pRange->pDevIns;
502	PPDMCRITSECT pCritSect = pDevIns->CTX_SUFF(pCritSect);
503
504	/*
505	* Call the device - 4 variations.
506	*/
507	VBOXSTRICTRC rcStrict;
508	if (pCritSect)
509	{
510	iomUnlock(pVM);
511	rcStrict = PDMCritSectEnter(pCritSect, VINF_IOM_HC_IOPORT_READ);
512	if (rcStrict != VINF_SUCCESS)
513	{
514	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->InRZToR3); });
515	return rcStrict;
516	}
517	#ifdef VBOX_WITH_STATISTICS
518	if (pStats)
519	{
520	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfIn), a);
521	rcStrict = pfnInStrCallback(pDevIns, pvUser, Port, pGCPtrDst, pcTransfers, cb);
522	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfIn), a);
523	}
524	else
525	#endif
526	rcStrict = pfnInStrCallback(pDevIns, pvUser, Port, pGCPtrDst, pcTransfers, cb);
527	PDMCritSectLeave(pCritSect);
528	}
529	else
530	{
531	#ifdef VBOX_WITH_STATISTICS
532	if (pStats)
533	{
534	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfIn), a);
535	rcStrict = pfnInStrCallback(pDevIns, pvUser, Port, pGCPtrDst, pcTransfers, cb);
536	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfIn), a);
537	}
538	else
539	#endif
540	rcStrict = pfnInStrCallback(pDevIns, pvUser, Port, pGCPtrDst, pcTransfers, cb);
541	}
542
543	#ifdef VBOX_WITH_STATISTICS
544	if (rcStrict == VINF_SUCCESS && pStats)
545	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(In));
546	# ifndef IN_RING3
547	else if (rcStrict == VINF_IOM_HC_IOPORT_READ && pStats)
548	STAM_COUNTER_INC(&pStats->InRZToR3);
549	# endif
550	#endif
551	Log3(("IOMIOPortReadStr: Port=%RTiop pGCPtrDst=%p pcTransfer=%p:{%#x->%#x} cb=%d rc=%Rrc\n",
552	Port, pGCPtrDst, pcTransfers, cTransfers, *pcTransfers, cb, VBOXSTRICTRC_VAL(rcStrict)));
553	if (!pCritSect)
554	iomUnlock(pVM);
555	return rcStrict;
556	}
557
558	#ifndef IN_RING3
559	/*
560	* Handler in ring-3?
561	*/
562	PIOMIOPORTRANGER3 pRangeR3 = iomIOPortGetRangeR3(&pVM->iom.s, Port);
563	if (pRangeR3)
564	{
565	# ifdef VBOX_WITH_STATISTICS
566	if (pStats)
567	STAM_COUNTER_INC(&pStats->InRZToR3);
568	# endif
569	iomUnlock(pVM);
570	return VINF_IOM_HC_IOPORT_READ;
571	}
572	#endif
573
574	/*
575	* Ok, no handler for this port.
576	*/
577	#ifdef VBOX_WITH_STATISTICS
578	if (pStats)
579	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(In));
580	else
581	{
582	# ifndef IN_RING3
583	/* Ring-3 will have to create the statistics record. */
584	iomUnlock(pVM);
585	return VINF_IOM_HC_IOPORT_READ;
586	# else
587	pStats = iomR3IOPortStatsCreate(pVM, Port, NULL);
588	if (pStats)
589	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(In));
590	# endif
591	}
592	#endif
593
594	Log3(("IOMIOPortReadStr: Port=%RTiop pGCPtrDst=%p pcTransfer=%p:{%#x->%#x} cb=%d rc=VINF_SUCCESS\n",
595	Port, pGCPtrDst, pcTransfers, cTransfers, *pcTransfers, cb));
596	iomUnlock(pVM);
597	return VINF_SUCCESS;
598	}
599
600
601	/**
602	* Writes to an I/O port register.
603	*
604	* @returns Strict VBox status code. Informational status codes other than the one documented
605	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
606	* @retval VINF_SUCCESS Success.
607	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
608	* status code must be passed on to EM.
609	* @retval VINF_IOM_HC_IOPORT_WRITE Defer the write to ring-3. (R0/GC only)
610	*
611	* @param pVM VM handle.
612	* @param Port The port to write to.
613	* @param u32Value The value to write.
614	* @param cbValue The size of the register to read in bytes. 1, 2 or 4 bytes.
615	*/
616	VMMDECL(VBOXSTRICTRC) IOMIOPortWrite(PVM pVM, RTIOPORT Port, uint32_t u32Value, size_t cbValue)
617	{
618	/* Take the IOM lock before performing any device I/O. */
619	int rc2 = iomLock(pVM);
620	#ifndef IN_RING3
621	if (rc2 == VERR_SEM_BUSY)
622	return VINF_IOM_HC_IOPORT_WRITE;
623	#endif
624	AssertRC(rc2);
625
626	/** @todo bird: When I get time, I'll remove the RC/R0 trees and link the RC/R0
627	* entries to the ring-3 node. */
628	#ifdef VBOX_WITH_STATISTICS
629	/*
630	* Find the statistics record.
631	*/
632	PIOMIOPORTSTATS pStats = pVM->iom.s.CTX_SUFF(pStatsLastWrite);
633	if (!pStats \|\| pStats->Core.Key != Port)
634	{
635	pStats = (PIOMIOPORTSTATS)RTAvloIOPortGet(&pVM->iom.s.CTX_SUFF(pTrees)->IOPortStatTree, Port);
636	if (pStats)
637	pVM->iom.s.CTX_SUFF(pStatsLastWrite) = pStats;
638	}
639	#endif
640
641	/*
642	* Get handler for current context.
643	*/
644	CTX_SUFF(PIOMIOPORTRANGE) pRange = pVM->iom.s.CTX_SUFF(pRangeLastWrite);
645	if ( !pRange
646	\|\| (unsigned)Port - (unsigned)pRange->Port >= (unsigned)pRange->cPorts)
647	{
648	pRange = iomIOPortGetRange(&pVM->iom.s, Port);
649	if (pRange)
650	pVM->iom.s.CTX_SUFF(pRangeLastWrite) = pRange;
651	}
652	MMHYPER_RC_ASSERT_RCPTR(pVM, pRange);
653	if (pRange)
654	{
655	/*
656	* Found a range.
657	*/
658	PFNIOMIOPORTOUT pfnOutCallback = pRange->pfnOutCallback;
659	#ifndef IN_RING3
660	if (!pfnOutCallback)
661	{
662	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->OutRZToR3); });
663	iomUnlock(pVM);
664	return VINF_IOM_HC_IOPORT_WRITE;
665	}
666	#endif
667	void *pvUser = pRange->pvUser;
668	PPDMDEVINS pDevIns = pRange->pDevIns;
669	PPDMCRITSECT pCritSect = pDevIns->CTX_SUFF(pCritSect);
670
671	/*
672	* Call the device - 4 variations.
673	*/
674	VBOXSTRICTRC rcStrict;
675	if (pCritSect)
676	{
677	iomUnlock(pVM);
678	rcStrict = PDMCritSectEnter(pCritSect, VINF_IOM_HC_IOPORT_WRITE);
679	if (rcStrict != VINF_SUCCESS)
680	{
681	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->OutRZToR3); });
682	return rcStrict;
683	}
684	#ifdef VBOX_WITH_STATISTICS
685	if (pStats)
686	{
687	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfOut), a);
688	rcStrict = pfnOutCallback(pDevIns, pvUser, Port, u32Value, (unsigned)cbValue);
689	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfOut), a);
690	}
691	else
692	#endif
693	rcStrict = pfnOutCallback(pDevIns, pvUser, Port, u32Value, (unsigned)cbValue);
694	PDMCritSectLeave(pCritSect);
695	}
696	else
697	{
698	#ifdef VBOX_WITH_STATISTICS
699	if (pStats)
700	{
701	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfOut), a);
702	rcStrict = pfnOutCallback(pDevIns, pvUser, Port, u32Value, (unsigned)cbValue);
703	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfOut), a);
704	}
705	else
706	#endif
707	rcStrict = pfnOutCallback(pDevIns, pvUser, Port, u32Value, (unsigned)cbValue);
708	}
709
710	#ifdef VBOX_WITH_STATISTICS
711	if (rcStrict == VINF_SUCCESS && pStats)
712	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Out));
713	# ifndef IN_RING3
714	else if (rcStrict == VINF_IOM_HC_IOPORT_WRITE && pStats)
715	STAM_COUNTER_INC(&pStats->OutRZToR3);
716	# endif
717	#endif
718	Log3(("IOMIOPortWrite: Port=%RTiop u32=%08RX32 cb=%d rc=%Rrc\n", Port, u32Value, cbValue, VBOXSTRICTRC_VAL(rcStrict)));
719	if (!pCritSect)
720	iomUnlock(pVM);
721	return rcStrict;
722	}
723
724	#ifndef IN_RING3
725	/*
726	* Handler in ring-3?
727	*/
728	PIOMIOPORTRANGER3 pRangeR3 = iomIOPortGetRangeR3(&pVM->iom.s, Port);
729	if (pRangeR3)
730	{
731	# ifdef VBOX_WITH_STATISTICS
732	if (pStats)
733	STAM_COUNTER_INC(&pStats->OutRZToR3);
734	# endif
735	iomUnlock(pVM);
736	return VINF_IOM_HC_IOPORT_WRITE;
737	}
738	#endif
739
740	/*
741	* Ok, no handler for that port.
742	*/
743	#ifdef VBOX_WITH_STATISTICS
744	/* statistics. */
745	if (pStats)
746	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Out));
747	else
748	{
749	# ifndef IN_RING3
750	/* R3 will have to create the statistics record. */
751	iomUnlock(pVM);
752	return VINF_IOM_HC_IOPORT_WRITE;
753	# else
754	pStats = iomR3IOPortStatsCreate(pVM, Port, NULL);
755	if (pStats)
756	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Out));
757	# endif
758	}
759	#endif
760	Log3(("IOMIOPortWrite: Port=%RTiop u32=%08RX32 cb=%d nop\n", Port, u32Value, cbValue));
761	iomUnlock(pVM);
762	return VINF_SUCCESS;
763	}
764
765
766	/**
767	* Writes the string buffer of an I/O port register.
768	*
769	* @returns Strict VBox status code. Informational status codes other than the one documented
770	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
771	* @retval VINF_SUCCESS Success.
772	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
773	* status code must be passed on to EM.
774	* @retval VINF_IOM_HC_IOPORT_WRITE Defer the write to ring-3. (R0/GC only)
775	*
776	* @param pVM VM handle.
777	* @param Port The port to write.
778	* @param pGCPtrSrc Pointer to the source buffer (GC, incremented appropriately).
779	* @param pcTransfers Pointer to the number of transfer units to write, on return remaining transfer units.
780	* @param cb Size of the transfer unit (1, 2 or 4 bytes).
781	* */
782	VMMDECL(VBOXSTRICTRC) IOMIOPortWriteString(PVM pVM, RTIOPORT Port, PRTGCPTR pGCPtrSrc, PRTGCUINTREG pcTransfers, unsigned cb)
783	{
784	/* Take the IOM lock before performing any device I/O. */
785	int rc2 = iomLock(pVM);
786	#ifndef IN_RING3
787	if (rc2 == VERR_SEM_BUSY)
788	return VINF_IOM_HC_IOPORT_WRITE;
789	#endif
790	AssertRC(rc2);
791
792	#ifdef LOG_ENABLED
793	const RTGCUINTREG cTransfers = *pcTransfers;
794	#endif
795	#ifdef VBOX_WITH_STATISTICS
796	/*
797	* Get the statistics record.
798	*/
799	PIOMIOPORTSTATS pStats = pVM->iom.s.CTX_SUFF(pStatsLastWrite);
800	if (!pStats \|\| pStats->Core.Key != Port)
801	{
802	pStats = (PIOMIOPORTSTATS)RTAvloIOPortGet(&pVM->iom.s.CTX_SUFF(pTrees)->IOPortStatTree, Port);
803	if (pStats)
804	pVM->iom.s.CTX_SUFF(pStatsLastWrite) = pStats;
805	}
806	#endif
807
808	/*
809	* Get handler for current context.
810	*/
811	CTX_SUFF(PIOMIOPORTRANGE) pRange = pVM->iom.s.CTX_SUFF(pRangeLastWrite);
812	if ( !pRange
813	\|\| (unsigned)Port - (unsigned)pRange->Port >= (unsigned)pRange->cPorts)
814	{
815	pRange = iomIOPortGetRange(&pVM->iom.s, Port);
816	if (pRange)
817	pVM->iom.s.CTX_SUFF(pRangeLastWrite) = pRange;
818	}
819	MMHYPER_RC_ASSERT_RCPTR(pVM, pRange);
820	if (pRange)
821	{
822	/*
823	* Found a range.
824	*/
825	PFNIOMIOPORTOUTSTRING pfnOutStrCallback = pRange->pfnOutStrCallback;
826	#ifndef IN_RING3
827	if (!pfnOutStrCallback)
828	{
829	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->OutRZToR3); });
830	iomUnlock(pVM);
831	return VINF_IOM_HC_IOPORT_WRITE;
832	}
833	#endif
834	void *pvUser = pRange->pvUser;
835	PPDMDEVINS pDevIns = pRange->pDevIns;
836	PPDMCRITSECT pCritSect = pDevIns->CTX_SUFF(pCritSect);
837
838	/*
839	* Call the device - 4 variations.
840	*/
841	VBOXSTRICTRC rcStrict;
842	if (pCritSect)
843	{
844	iomUnlock(pVM);
845	rcStrict = PDMCritSectEnter(pCritSect, VINF_IOM_HC_IOPORT_WRITE);
846	if (rcStrict != VINF_SUCCESS)
847	{
848	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->OutRZToR3); });
849	return rcStrict;
850	}
851	#ifdef VBOX_WITH_STATISTICS
852	if (pStats)
853	{
854	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfOut), a);
855	rcStrict = pfnOutStrCallback(pDevIns, pvUser, Port, pGCPtrSrc, pcTransfers, cb);
856	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfOut), a);
857	}
858	else
859	#endif
860	rcStrict = pfnOutStrCallback(pDevIns, pvUser, Port, pGCPtrSrc, pcTransfers, cb);
861	PDMCritSectLeave(pCritSect);
862	}
863	else
864	{
865	#ifdef VBOX_WITH_STATISTICS
866	if (pStats)
867	{
868	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfOut), a);
869	rcStrict = pfnOutStrCallback(pDevIns, pvUser, Port, pGCPtrSrc, pcTransfers, cb);
870	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfOut), a);
871	}
872	else
873	#endif
874	rcStrict = pfnOutStrCallback(pDevIns, pvUser, Port, pGCPtrSrc, pcTransfers, cb);
875	}
876
877	#ifdef VBOX_WITH_STATISTICS
878	if (rcStrict == VINF_SUCCESS && pStats)
879	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Out));
880	# ifndef IN_RING3
881	else if (rcStrict == VINF_IOM_HC_IOPORT_WRITE && pStats)
882	STAM_COUNTER_INC(&pStats->OutRZToR3);
883	# endif
884	#endif
885	Log3(("IOMIOPortWriteStr: Port=%RTiop pGCPtrSrc=%p pcTransfer=%p:{%#x->%#x} cb=%d rcStrict=%Rrc\n",
886	Port, pGCPtrSrc, pcTransfers, cTransfers, *pcTransfers, cb, VBOXSTRICTRC_VAL(rcStrict)));
887	if (!pCritSect)
888	iomUnlock(pVM);
889	return rcStrict;
890	}
891
892	#ifndef IN_RING3
893	/*
894	* Handler in ring-3?
895	*/
896	PIOMIOPORTRANGER3 pRangeR3 = iomIOPortGetRangeR3(&pVM->iom.s, Port);
897	if (pRangeR3)
898	{
899	# ifdef VBOX_WITH_STATISTICS
900	if (pStats)
901	STAM_COUNTER_INC(&pStats->OutRZToR3);
902	# endif
903	iomUnlock(pVM);
904	return VINF_IOM_HC_IOPORT_WRITE;
905	}
906	#endif
907
908	/*
909	* Ok, no handler for this port.
910	*/
911	#ifdef VBOX_WITH_STATISTICS
912	if (pStats)
913	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Out));
914	else
915	{
916	# ifndef IN_RING3
917	/* Ring-3 will have to create the statistics record. */
918	iomUnlock(pVM);
919	return VINF_IOM_HC_IOPORT_WRITE;
920	# else
921	pStats = iomR3IOPortStatsCreate(pVM, Port, NULL);
922	if (pStats)
923	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Out));
924	# endif
925	}
926	#endif
927
928	Log3(("IOMIOPortWriteStr: Port=%RTiop pGCPtrSrc=%p pcTransfer=%p:{%#x->%#x} cb=%d rc=VINF_SUCCESS\n",
929	Port, pGCPtrSrc, pcTransfers, cTransfers, *pcTransfers, cb));
930	iomUnlock(pVM);
931	return VINF_SUCCESS;
932	}
933
934
935	/**
936	* Checks that the operation is allowed according to the IOPL
937	* level and I/O bitmap.
938	*
939	* @returns Strict VBox status code. Informational status codes other than the one documented
940	* here are to be treated as internal failure.
941	* @retval VINF_SUCCESS Success.
942	* @retval VINF_EM_RAW_GUEST_TRAP The exception was left pending. (TRPMRaiseXcptErr)
943	* @retval VINF_TRPM_XCPT_DISPATCHED The exception was raised and dispatched for raw-mode execution. (TRPMRaiseXcptErr)
944	* @retval VINF_EM_RESCHEDULE_REM The exception was dispatched and cannot be executed in raw-mode. (TRPMRaiseXcptErr)
945	*
946	* @param pVM VM handle.
947	* @param pCtxCore Pointer to register frame.
948	* @param Port The I/O port number.
949	* @param cb The access size.
950	*/
951	VMMDECL(VBOXSTRICTRC) IOMInterpretCheckPortIOAccess(PVM pVM, PCPUMCTXCORE pCtxCore, RTIOPORT Port, unsigned cb)
952	{
953	PVMCPU pVCpu = VMMGetCpu(pVM);
954
955	/*
956	* If this isn't ring-0, we have to check for I/O privileges.
957	*/
958	uint32_t efl = CPUMRawGetEFlags(pVCpu, pCtxCore);
959	uint32_t cpl = CPUMGetGuestCPL(pVCpu, pCtxCore);
960
961	if ( ( cpl > 0
962	&& X86_EFL_GET_IOPL(efl) < cpl)
963	\|\| pCtxCore->eflags.Bits.u1VM /* IOPL is ignored in V86 mode; always check TSS bitmap */
964	)
965	{
966	/*
967	* Get TSS location and check if there can be a I/O bitmap.
968	*/
969	RTGCUINTPTR GCPtrTss;
970	RTGCUINTPTR cbTss;
971	bool fCanHaveIOBitmap;
972	int rc2 = SELMGetTSSInfo(pVM, pVCpu, &GCPtrTss, &cbTss, &fCanHaveIOBitmap);
973	if (RT_FAILURE(rc2))
974	{
975	Log(("iomInterpretCheckPortIOAccess: Port=%RTiop cb=%d %Rrc -> #GP(0)\n", Port, cb, rc2));
976	return TRPMRaiseXcptErr(pVCpu, pCtxCore, X86_XCPT_GP, 0);
977	}
978
979	if ( !fCanHaveIOBitmap
980	\|\| cbTss <= sizeof(VBOXTSS)) /** @todo r=bird: Should this really include the interrupt redirection bitmap? */
981	{
982	Log(("iomInterpretCheckPortIOAccess: Port=%RTiop cb=%d cbTss=%#x fCanHaveIOBitmap=%RTbool -> #GP(0)\n",
983	Port, cb, cbTss, fCanHaveIOBitmap));
984	return TRPMRaiseXcptErr(pVCpu, pCtxCore, X86_XCPT_GP, 0);
985	}
986
987	/*
988	* Fetch the I/O bitmap offset.
989	*/
990	uint16_t offIOPB;
991	VBOXSTRICTRC rcStrict = PGMPhysInterpretedRead(pVCpu, pCtxCore, &offIOPB, GCPtrTss + RT_OFFSETOF(VBOXTSS, offIoBitmap), sizeof(offIOPB));
992	if (rcStrict != VINF_SUCCESS)
993	{
994	Log(("iomInterpretCheckPortIOAccess: Port=%RTiop cb=%d GCPtrTss=%RGv %Rrc\n",
995	Port, cb, GCPtrTss, VBOXSTRICTRC_VAL(rcStrict)));
996	return rcStrict;
997	}
998
999	/*
1000	* Check the limit and read the two bitmap bytes.
1001	*/
1002	uint32_t offTss = offIOPB + (Port >> 3);
1003	if (offTss + 1 >= cbTss)
1004	{
1005	Log(("iomInterpretCheckPortIOAccess: Port=%RTiop cb=%d offTss=%#x cbTss=%#x -> #GP(0)\n",
1006	Port, cb, offTss, cbTss));
1007	return TRPMRaiseXcptErr(pVCpu, pCtxCore, X86_XCPT_GP, 0);
1008	}
1009	uint16_t u16;
1010	rcStrict = PGMPhysInterpretedRead(pVCpu, pCtxCore, &u16, GCPtrTss + offTss, sizeof(u16));
1011	if (rcStrict != VINF_SUCCESS)
1012	{
1013	Log(("iomInterpretCheckPortIOAccess: Port=%RTiop cb=%d GCPtrTss=%RGv offTss=%#x -> %Rrc\n",
1014	Port, cb, GCPtrTss, offTss, VBOXSTRICTRC_VAL(rcStrict)));
1015	return rcStrict;
1016	}
1017
1018	/*
1019	* All the bits must be clear.
1020	*/
1021	if ((u16 >> (Port & 7)) & ((1 << cb) - 1))
1022	{
1023	Log(("iomInterpretCheckPortIOAccess: Port=%RTiop cb=%d u16=%#x -> #GP(0)\n",
1024	Port, cb, u16, offTss));
1025	return TRPMRaiseXcptErr(pVCpu, pCtxCore, X86_XCPT_GP, 0);
1026	}
1027	LogFlow(("iomInterpretCheckPortIOAccess: Port=%RTiop cb=%d offTss=%#x cbTss=%#x u16=%#x -> OK\n",
1028	Port, cb, u16, offTss, cbTss));
1029	}
1030	return VINF_SUCCESS;
1031	}
1032
1033
1034	/**
1035	* IN <AL\|AX\|EAX>, <DX\|imm16>
1036	*
1037	* @returns Strict VBox status code. Informational status codes other than the one documented
1038	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
1039	* @retval VINF_SUCCESS Success.
1040	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
1041	* status code must be passed on to EM.
1042	* @retval VINF_IOM_HC_IOPORT_READ Defer the read to ring-3. (R0/GC only)
1043	* @retval VINF_EM_RAW_GUEST_TRAP The exception was left pending. (TRPMRaiseXcptErr)
1044	* @retval VINF_TRPM_XCPT_DISPATCHED The exception was raised and dispatched for raw-mode execution. (TRPMRaiseXcptErr)
1045	* @retval VINF_EM_RESCHEDULE_REM The exception was dispatched and cannot be executed in raw-mode. (TRPMRaiseXcptErr)
1046	*
1047	* @param pVM The virtual machine (GC pointer ofcourse).
1048	* @param pRegFrame Pointer to CPUMCTXCORE guest registers structure.
1049	* @param pCpu Disassembler CPU state.
1050	*/
1051	VMMDECL(VBOXSTRICTRC) IOMInterpretIN(PVM pVM, PCPUMCTXCORE pRegFrame, PDISCPUSTATE pCpu)
1052	{
1053	#ifdef IN_RC
1054	STAM_COUNTER_INC(&pVM->iom.s.StatInstIn);
1055	#endif
1056
1057	/*
1058	* Get port number from second parameter.
1059	* And get the register size from the first parameter.
1060	*/
1061	uint64_t uPort = 0;
1062	unsigned cbSize = 0;
1063	bool fRc = iomGetRegImmData(pCpu, &pCpu->param2, pRegFrame, &uPort, &cbSize);
1064	AssertMsg(fRc, ("Failed to get reg/imm port number!\n")); NOREF(fRc);
1065
1066	cbSize = DISGetParamSize(pCpu, &pCpu->param1);
1067	Assert(cbSize > 0);
1068	VBOXSTRICTRC rcStrict = IOMInterpretCheckPortIOAccess(pVM, pRegFrame, uPort, cbSize);
1069	if (rcStrict == VINF_SUCCESS)
1070	{
1071	/*
1072	* Attemp to read the port.
1073	*/
1074	uint32_t u32Data = UINT32_C(0xffffffff);
1075	rcStrict = IOMIOPortRead(pVM, uPort, &u32Data, cbSize);
1076	if (IOM_SUCCESS(rcStrict))
1077	{
1078	/*
1079	* Store the result in the AL\|AX\|EAX register.
1080	*/
1081	fRc = iomSaveDataToReg(pCpu, &pCpu->param1, pRegFrame, u32Data);
1082	AssertMsg(fRc, ("Failed to store register value!\n")); NOREF(fRc);
1083	}
1084	else
1085	AssertMsg(rcStrict == VINF_IOM_HC_IOPORT_READ \|\| RT_FAILURE(rcStrict), ("%Rrc\n", VBOXSTRICTRC_VAL(rcStrict)));
1086	}
1087	else
1088	AssertMsg(rcStrict == VINF_EM_RAW_GUEST_TRAP \|\| rcStrict == VINF_TRPM_XCPT_DISPATCHED \|\| rcStrict == VINF_TRPM_XCPT_DISPATCHED \|\| RT_FAILURE(rcStrict), ("%Rrc\n", VBOXSTRICTRC_VAL(rcStrict)));
1089
1090	return rcStrict;
1091	}
1092
1093
1094	/**
1095	* OUT <DX\|imm16>, <AL\|AX\|EAX>
1096	*
1097	* @returns Strict VBox status code. Informational status codes other than the one documented
1098	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
1099	* @retval VINF_SUCCESS Success.
1100	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
1101	* status code must be passed on to EM.
1102	* @retval VINF_IOM_HC_IOPORT_WRITE Defer the write to ring-3. (R0/GC only)
1103	* @retval VINF_EM_RAW_GUEST_TRAP The exception was left pending. (TRPMRaiseXcptErr)
1104	* @retval VINF_TRPM_XCPT_DISPATCHED The exception was raised and dispatched for raw-mode execution. (TRPMRaiseXcptErr)
1105	* @retval VINF_EM_RESCHEDULE_REM The exception was dispatched and cannot be executed in raw-mode. (TRPMRaiseXcptErr)
1106	*
1107	* @param pVM The virtual machine (GC pointer ofcourse).
1108	* @param pRegFrame Pointer to CPUMCTXCORE guest registers structure.
1109	* @param pCpu Disassembler CPU state.
1110	*/
1111	VMMDECL(VBOXSTRICTRC) IOMInterpretOUT(PVM pVM, PCPUMCTXCORE pRegFrame, PDISCPUSTATE pCpu)
1112	{
1113	#ifdef IN_RC
1114	STAM_COUNTER_INC(&pVM->iom.s.StatInstOut);
1115	#endif
1116
1117	/*
1118	* Get port number from first parameter.
1119	* And get the register size and value from the second parameter.
1120	*/
1121	uint64_t uPort = 0;
1122	unsigned cbSize = 0;
1123	bool fRc = iomGetRegImmData(pCpu, &pCpu->param1, pRegFrame, &uPort, &cbSize);
1124	AssertMsg(fRc, ("Failed to get reg/imm port number!\n")); NOREF(fRc);
1125
1126	VBOXSTRICTRC rcStrict = IOMInterpretCheckPortIOAccess(pVM, pRegFrame, uPort, cbSize);
1127	if (rcStrict == VINF_SUCCESS)
1128	{
1129	uint64_t u64Data = 0;
1130	fRc = iomGetRegImmData(pCpu, &pCpu->param2, pRegFrame, &u64Data, &cbSize);
1131	AssertMsg(fRc, ("Failed to get reg value!\n")); NOREF(fRc);
1132
1133	/*
1134	* Attempt to write to the port.
1135	*/
1136	rcStrict = IOMIOPortWrite(pVM, uPort, u64Data, cbSize);
1137	AssertMsg(rcStrict == VINF_SUCCESS \|\| rcStrict == VINF_IOM_HC_IOPORT_WRITE \|\| (rcStrict >= VINF_EM_FIRST && rcStrict <= VINF_EM_LAST) \|\| RT_FAILURE(rcStrict), ("%Rrc\n", VBOXSTRICTRC_VAL(rcStrict)));
1138	}
1139	else
1140	AssertMsg(rcStrict == VINF_EM_RAW_GUEST_TRAP \|\| rcStrict == VINF_TRPM_XCPT_DISPATCHED \|\| rcStrict == VINF_TRPM_XCPT_DISPATCHED \|\| RT_FAILURE(rcStrict), ("%Rrc\n", VBOXSTRICTRC_VAL(rcStrict)));
1141	return rcStrict;
1142	}

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source: vbox/trunk/src/VBox/VMM/VMMAll/IOMAll.cpp@ 30045

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