DevFwCommon.cpp@ 41087

Last change on this file since 41087 was 40277, checked in by vboxsync, 13 years ago
DevPcBios: always copy the BIOS to RAM and patch the DMI table field length after planting the DMI table
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 43.8 KB

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1	/* $Id: DevFwCommon.cpp 40277 2012-02-28 14:10:07Z vboxsync $ */
2	/** @file
3	* FwCommon - Shared firmware code (used by DevPcBios & DevEFI).
4	*/
5
6	/*
7	* Copyright (C) 2009 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_DEV
22	#include <VBox/vmm/pdmdev.h>
23
24	#include <VBox/log.h>
25	#include <VBox/err.h>
26	#include <VBox/param.h>
27
28	#include <iprt/asm.h>
29	#include <iprt/assert.h>
30	#include <iprt/buildconfig.h>
31	#include <iprt/file.h>
32	#include <iprt/mem.h>
33	#include <iprt/string.h>
34	#include <iprt/uuid.h>
35	#include <iprt/system.h>
36
37	#include "VBoxDD.h"
38	#include "VBoxDD2.h"
39	#include "DevFwCommon.h"
40
41
42	/*******************************************************************************
43	* Defined Constants And Macros *
44	*******************************************************************************/
45
46	/*
47	* Default DMI data (legacy).
48	* Don't change this information otherwise Windows guests might demand re-activation!
49	*/
50
51	/* type 0 -- DMI BIOS information */
52	static const int32_t s_iDefDmiBIOSReleaseMajor = 0;
53	static const int32_t s_iDefDmiBIOSReleaseMinor = 0;
54	static const int32_t s_iDefDmiBIOSFirmwareMajor = 0;
55	static const int32_t s_iDefDmiBIOSFirmwareMinor = 0;
56	static const char *s_szDefDmiBIOSVendor = "innotek GmbH";
57	static const char *s_szDefDmiBIOSVersion = "VirtualBox";
58	static const char *s_szDefDmiBIOSReleaseDate = "12/01/2006";
59	/* type 1 -- DMI system information */
60	static const char *s_szDefDmiSystemVendor = "innotek GmbH";
61	static const char *s_szDefDmiSystemProduct = "VirtualBox";
62	static const char *s_szDefDmiSystemVersion = "1.2";
63	static const char *s_szDefDmiSystemSerial = "0";
64	static const char *s_szDefDmiSystemSKU = "";
65	static const char *s_szDefDmiSystemFamily = "Virtual Machine";
66	/* type 2 -- DMI board information */
67	static const char *s_szDefDmiBoardVendor = "Oracle Corporation";
68	static const char *s_szDefDmiBoardProduct = "VirtualBox";
69	static const char *s_szDefDmiBoardVersion = "1.2";
70	static const char *s_szDefDmiBoardSerial = "0";
71	static const char *s_szDefDmiBoardAssetTag = "";
72	static const char *s_szDefDmiBoardLocInChass = "";
73	static const int32_t s_iDefDmiBoardBoardType = 0x0A; /* Motherboard */
74	/* type 3 -- DMI chassis information */
75	static const char *s_szDefDmiChassisVendor = "Oracle Corporation";
76	static const char *s_szDefDmiChassisVersion = "";
77	static const char *s_szDefDmiChassisSerial = "";
78	static const char *s_szDefDmiChassisAssetTag = "";
79	/* type 4 -- DMI processor information */
80	static const char *s_szDefDmiProcManufacturer = "GenuineIntel";
81	static const char *s_szDefDmiProcVersion = "Pentium(R) III";
82
83	static char g_szHostDmiSystemProduct[64];
84	static char g_szHostDmiSystemVersion[64];
85
86
87	/*******************************************************************************
88	* Structures and Typedefs *
89	*******************************************************************************/
90	#pragma pack(1)
91
92	typedef struct SMBIOSHDR
93	{
94	uint8_t au8Signature[4];
95	uint8_t u8Checksum;
96	uint8_t u8Eps;
97	uint8_t u8VersionMajor;
98	uint8_t u8VersionMinor;
99	uint16_t u16MaxStructureSize;
100	uint8_t u8EntryPointRevision;
101	uint8_t u8Pad[5];
102	} *SMBIOSHDRPTR;
103	AssertCompileSize(SMBIOSHDR, 16);
104
105	typedef struct DMIMAINHDR
106	{
107	uint8_t au8Signature[5];
108	uint8_t u8Checksum;
109	uint16_t u16TablesLength;
110	uint32_t u32TableBase;
111	uint16_t u16TableEntries;
112	uint8_t u8TableVersion;
113	} *DMIMAINHDRPTR;
114	AssertCompileSize(DMIMAINHDR, 15);
115
116	/** DMI header */
117	typedef struct DMIHDR
118	{
119	uint8_t u8Type;
120	uint8_t u8Length;
121	uint16_t u16Handle;
122	} *PDMIHDR;
123	AssertCompileSize(DMIHDR, 4);
124
125	/** DMI BIOS information (Type 0) */
126	typedef struct DMIBIOSINF
127	{
128	DMIHDR header;
129	uint8_t u8Vendor;
130	uint8_t u8Version;
131	uint16_t u16Start;
132	uint8_t u8Release;
133	uint8_t u8ROMSize;
134	uint64_t u64Characteristics;
135	uint8_t u8CharacteristicsByte1;
136	uint8_t u8CharacteristicsByte2;
137	uint8_t u8ReleaseMajor;
138	uint8_t u8ReleaseMinor;
139	uint8_t u8FirmwareMajor;
140	uint8_t u8FirmwareMinor;
141	} *PDMIBIOSINF;
142	AssertCompileSize(DMIBIOSINF, 0x18);
143
144	/** DMI system information (Type 1) */
145	typedef struct DMISYSTEMINF
146	{
147	DMIHDR header;
148	uint8_t u8Manufacturer;
149	uint8_t u8ProductName;
150	uint8_t u8Version;
151	uint8_t u8SerialNumber;
152	uint8_t au8Uuid[16];
153	uint8_t u8WakeupType;
154	uint8_t u8SKUNumber;
155	uint8_t u8Family;
156	} *PDMISYSTEMINF;
157	AssertCompileSize(DMISYSTEMINF, 0x1b);
158
159	/** DMI board (or module) information (Type 2) */
160	typedef struct DMIBOARDINF
161	{
162	DMIHDR header;
163	uint8_t u8Manufacturer;
164	uint8_t u8Product;
165	uint8_t u8Version;
166	uint8_t u8SerialNumber;
167	uint8_t u8AssetTag;
168	uint8_t u8FeatureFlags;
169	uint8_t u8LocationInChass;
170	uint16_t u16ChassisHandle;
171	uint8_t u8BoardType;
172	uint8_t u8cObjectHandles;
173	} *PDMIBOARDINF;
174	AssertCompileSize(DMIBOARDINF, 0x0f);
175
176	/** DMI system enclosure or chassis type (Type 3) */
177	typedef struct DMICHASSIS
178	{
179	DMIHDR header;
180	uint8_t u8Manufacturer;
181	uint8_t u8Type;
182	uint8_t u8Version;
183	uint8_t u8SerialNumber;
184	uint8_t u8AssetTag;
185	uint8_t u8BootupState;
186	uint8_t u8PowerSupplyState;
187	uint8_t u8ThermalState;
188	uint8_t u8SecurityStatus;
189	/* v2.3+, currently not supported */
190	uint32_t u32OEMdefined;
191	uint8_t u8Height;
192	uint8_t u8NumPowerChords;
193	uint8_t u8ContElems;
194	uint8_t u8ContElemRecLen;
195	} *PDMICHASSIS;
196	AssertCompileSize(DMICHASSIS, 0x15);
197
198	/** DMI processor information (Type 4) */
199	typedef struct DMIPROCESSORINF
200	{
201	DMIHDR header;
202	uint8_t u8SocketDesignation;
203	uint8_t u8ProcessorType;
204	uint8_t u8ProcessorFamily;
205	uint8_t u8ProcessorManufacturer;
206	uint64_t u64ProcessorID;
207	uint8_t u8ProcessorVersion;
208	uint8_t u8Voltage;
209	uint16_t u16ExternalClock;
210	uint16_t u16MaxSpeed;
211	uint16_t u16CurrentSpeed;
212	uint8_t u8Status;
213	uint8_t u8ProcessorUpgrade;
214	/* v2.1+ */
215	uint16_t u16L1CacheHandle;
216	uint16_t u16L2CacheHandle;
217	uint16_t u16L3CacheHandle;
218	/* v2.3+ */
219	uint8_t u8SerialNumber;
220	uint8_t u8AssetTag;
221	uint8_t u8PartNumber;
222	/* v2.5+ */
223	uint8_t u8CoreCount;
224	uint8_t u8CoreEnabled;
225	uint8_t u8ThreadCount;
226	uint16_t u16ProcessorCharacteristics;
227	/* v2.6+ */
228	uint16_t u16ProcessorFamily2;
229	} *PDMIPROCESSORINF;
230	AssertCompileSize(DMIPROCESSORINF, 0x2a);
231
232	/** DMI OEM strings (Type 11) */
233	typedef struct DMIOEMSTRINGS
234	{
235	DMIHDR header;
236	uint8_t u8Count;
237	uint8_t u8VBoxVersion;
238	uint8_t u8VBoxRevision;
239	} *PDMIOEMSTRINGS;
240	AssertCompileSize(DMIOEMSTRINGS, 0x7);
241
242	/** Physical memory array (Type 16) */
243	typedef struct DMIRAMARRAY
244	{
245	DMIHDR header;
246	uint8_t u8Location;
247	uint8_t u8Use;
248	uint8_t u8MemErrorCorrection;
249	uint32_t u32MaxCapacity;
250	uint16_t u16MemErrorHandle;
251	uint16_t u16NumberOfMemDevices;
252	} *PDMIRAMARRAY;
253	AssertCompileSize(DMIRAMARRAY, 15);
254
255	/** DMI Memory Device (Type 17) */
256	typedef struct DMIMEMORYDEV
257	{
258	DMIHDR header;
259	uint16_t u16PhysMemArrayHandle;
260	uint16_t u16MemErrHandle;
261	uint16_t u16TotalWidth;
262	uint16_t u16DataWidth;
263	uint16_t u16Size;
264	uint8_t u8FormFactor;
265	uint8_t u8DeviceSet;
266	uint8_t u8DeviceLocator;
267	uint8_t u8BankLocator;
268	uint8_t u8MemoryType;
269	uint16_t u16TypeDetail;
270	uint16_t u16Speed;
271	uint8_t u8Manufacturer;
272	uint8_t u8SerialNumber;
273	uint8_t u8AssetTag;
274	uint8_t u8PartNumber;
275	/* v2.6+ */
276	uint8_t u8Attributes;
277	} *PDMIMEMORYDEV;
278	AssertCompileSize(DMIMEMORYDEV, 28);
279
280	/** MPS floating pointer structure */
281	typedef struct MPSFLOATPTR
282	{
283	uint8_t au8Signature[4];
284	uint32_t u32MPSAddr;
285	uint8_t u8Length;
286	uint8_t u8SpecRev;
287	uint8_t u8Checksum;
288	uint8_t au8Feature[5];
289	} *PMPSFLOATPTR;
290	AssertCompileSize(MPSFLOATPTR, 16);
291
292	/** MPS config table header */
293	typedef struct MPSCFGTBLHEADER
294	{
295	uint8_t au8Signature[4];
296	uint16_t u16Length;
297	uint8_t u8SpecRev;
298	uint8_t u8Checksum;
299	uint8_t au8OemId[8];
300	uint8_t au8ProductId[12];
301	uint32_t u32OemTablePtr;
302	uint16_t u16OemTableSize;
303	uint16_t u16EntryCount;
304	uint32_t u32AddrLocalApic;
305	uint16_t u16ExtTableLength;
306	uint8_t u8ExtTableChecksum;
307	uint8_t u8Reserved;
308	} *PMPSCFGTBLHEADER;
309	AssertCompileSize(MPSCFGTBLHEADER, 0x2c);
310
311	/** MPS processor entry */
312	typedef struct MPSPROCENTRY
313	{
314	uint8_t u8EntryType;
315	uint8_t u8LocalApicId;
316	uint8_t u8LocalApicVersion;
317	uint8_t u8CPUFlags;
318	uint32_t u32CPUSignature;
319	uint32_t u32CPUFeatureFlags;
320	uint32_t u32Reserved[2];
321	} *PMPSPROCENTRY;
322	AssertCompileSize(MPSPROCENTRY, 20);
323
324	/** MPS bus entry */
325	typedef struct MPSBUSENTRY
326	{
327	uint8_t u8EntryType;
328	uint8_t u8BusId;
329	uint8_t au8BusTypeStr[6];
330	} *PMPSBUSENTRY;
331	AssertCompileSize(MPSBUSENTRY, 8);
332
333	/** MPS I/O-APIC entry */
334	typedef struct MPSIOAPICENTRY
335	{
336	uint8_t u8EntryType;
337	uint8_t u8Id;
338	uint8_t u8Version;
339	uint8_t u8Flags;
340	uint32_t u32Addr;
341	} *PMPSIOAPICENTRY;
342	AssertCompileSize(MPSIOAPICENTRY, 8);
343
344	/** MPS I/O-Interrupt entry */
345	typedef struct MPSIOINTERRUPTENTRY
346	{
347	uint8_t u8EntryType;
348	uint8_t u8Type;
349	uint16_t u16Flags;
350	uint8_t u8SrcBusId;
351	uint8_t u8SrcBusIrq;
352	uint8_t u8DstIOAPICId;
353	uint8_t u8DstIOAPICInt;
354	} *PMPSIOIRQENTRY;
355	AssertCompileSize(MPSIOINTERRUPTENTRY, 8);
356
357	#pragma pack()
358
359
360	/**
361	* Calculate a simple checksum for the MPS table.
362	*
363	* @param data data
364	* @param len size of data
365	*/
366	static uint8_t fwCommonChecksum(const uint8_t * const au8Data, uint32_t u32Length)
367	{
368	uint8_t u8Sum = 0;
369	for (size_t i = 0; i < u32Length; ++i)
370	u8Sum += au8Data[i];
371	return -u8Sum;
372	}
373
374	#if 0 /* unused */
375	static bool fwCommonChecksumOk(const uint8_t * const au8Data, uint32_t u32Length)
376	{
377	uint8_t u8Sum = 0;
378	for (size_t i = 0; i < u32Length; i++)
379	u8Sum += au8Data[i];
380	return (u8Sum == 0);
381	}
382	#endif
383
384	/**
385	* Try fetch the DMI strings from the system.
386	*/
387	static void fwCommonUseHostDMIStrings(void)
388	{
389	int rc;
390
391	rc = RTSystemQueryDmiString(RTSYSDMISTR_PRODUCT_NAME,
392	g_szHostDmiSystemProduct, sizeof(g_szHostDmiSystemProduct));
393	if (RT_SUCCESS(rc))
394	{
395	s_szDefDmiSystemProduct = g_szHostDmiSystemProduct;
396	LogRel(("DMI: Using DmiSystemProduct from host: %s\n", g_szHostDmiSystemProduct));
397	}
398
399	rc = RTSystemQueryDmiString(RTSYSDMISTR_PRODUCT_VERSION,
400	g_szHostDmiSystemVersion, sizeof(g_szHostDmiSystemVersion));
401	if (RT_SUCCESS(rc))
402	{
403	s_szDefDmiSystemVersion = g_szHostDmiSystemVersion;
404	LogRel(("DMI: Using DmiSystemVersion from host: %s\n", g_szHostDmiSystemVersion));
405	}
406	}
407
408	/**
409	* Construct the DMI table.
410	*
411	* @returns VBox status code.
412	* @param pDevIns The device instance.
413	* @param pTable Where to create the DMI table.
414	* @param cbMax The maximum size of the DMI table.
415	* @param pUuid Pointer to the UUID to use if the DmiUuid
416	* configuration string isn't present.
417	* @param pCfg The handle to our config node.
418	*/
419	int FwCommonPlantDMITable(PPDMDEVINS pDevIns, uint8_t pTable, unsigned cbMax, PCRTUUID pUuid, PCFGMNODE pCfg, uint16_t cCpus, uint16_t pcbDmiTables)
420	{
421	#define CHECKSIZE(cbWant) \
422	{ \
423	size_t cbNeed = (size_t)(pszStr + cbWant - (char )pTable) + 5; / +1 for strtab terminator +4 for end-of-table entry */ \
424	if (cbNeed > cbMax) \
425	{ \
426	if (fHideErrors) \
427	{ \
428	LogRel(("One of the DMI strings is too long -- using default DMI data!\n")); \
429	continue; \
430	} \
431	return PDMDevHlpVMSetError(pDevIns, VERR_TOO_MUCH_DATA, RT_SRC_POS, \
432	N_("One of the DMI strings is too long. Check all bios/Dmi* configuration entries. At least %zu bytes are needed but there is no space for more than %d bytes"), cbNeed, cbMax); \
433	} \
434	}
435
436	#define READCFGSTRDEF(variable, name, default_value) \
437	{ \
438	if (fForceDefault) \
439	pszTmp = default_value; \
440	else \
441	{ \
442	rc = CFGMR3QueryStringDef(pCfg, name, szBuf, sizeof(szBuf), default_value); \
443	if (RT_FAILURE(rc)) \
444	{ \
445	if (fHideErrors) \
446	{ \
447	LogRel(("Configuration error: Querying \"" name "\" as a string failed -- using default DMI data!\n")); \
448	continue; \
449	} \
450	return PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS, \
451	N_("Configuration error: Querying \"" name "\" as a string failed")); \
452	} \
453	else if (!strcmp(szBuf, "<EMPTY>")) \
454	pszTmp = ""; \
455	else \
456	pszTmp = szBuf; \
457	} \
458	if (!pszTmp[0]) \
459	variable = 0; /* empty string */ \
460	else \
461	{ \
462	variable = iStrNr++; \
463	size_t cStr = strlen(pszTmp) + 1; \
464	CHECKSIZE(cStr); \
465	memcpy(pszStr, pszTmp, cStr); \
466	pszStr += cStr ; \
467	} \
468	}
469
470	#define READCFGSTR(variable, name) \
471	READCFGSTRDEF(variable, # name, s_szDef ## name)
472
473	#define READCFGINT(variable, name) \
474	{ \
475	if (fForceDefault) \
476	variable = s_iDef ## name; \
477	else \
478	{ \
479	rc = CFGMR3QueryS32Def(pCfg, # name, & variable, s_iDef ## name); \
480	if (RT_FAILURE(rc)) \
481	{ \
482	if (fHideErrors) \
483	{ \
484	LogRel(("Configuration error: Querying \"" # name "\" as an int failed -- using default DMI data!\n")); \
485	continue; \
486	} \
487	return PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS, \
488	N_("Configuration error: Querying \"" # name "\" as an int failed")); \
489	} \
490	} \
491	}
492
493	#define START_STRUCT(tbl) \
494	pszStr = (char *)(tbl + 1); \
495	iStrNr = 1;
496
497	#define TERM_STRUCT \
498	{ \
499	pszStr++ = '\0'; / terminate set of text strings */ \
500	if (iStrNr == 1) \
501	pszStr++ = '\0'; / terminate a structure without strings */ \
502	}
503
504	bool fForceDefault = false;
505	#ifdef VBOX_BIOS_DMI_FALLBACK
506	/*
507	* There will be two passes. If an error occurs during the first pass, a
508	* message will be written to the release log and we fall back to default
509	* DMI data and start a second pass.
510	*/
511	bool fHideErrors = true;
512	#else
513	/*
514	* There will be one pass, every error is fatal and will prevent the VM
515	* from starting.
516	*/
517	bool fHideErrors = false;
518	#endif
519
520	uint8_t fDmiUseHostInfo;
521	int rc = CFGMR3QueryU8Def(pCfg, "DmiUseHostInfo", &fDmiUseHostInfo, 0);
522	if (RT_FAILURE (rc))
523	return PDMDEV_SET_ERROR(pDevIns, rc,
524	N_("Configuration error: Failed to read \"DmiUseHostInfo\""));
525
526	/* Sync up with host default DMI values */
527	if (fDmiUseHostInfo)
528	fwCommonUseHostDMIStrings();
529
530	uint8_t fDmiExposeMemoryTable;
531	rc = CFGMR3QueryU8Def(pCfg, "DmiExposeMemoryTable", &fDmiExposeMemoryTable, 0);
532	if (RT_FAILURE (rc))
533	return PDMDEV_SET_ERROR(pDevIns, rc,
534	N_("Configuration error: Failed to read \"DmiExposeMemoryTable\""));
535	uint8_t fDmiExposeProcessorInf;
536	rc = CFGMR3QueryU8Def(pCfg, "DmiExposeProcInf", &fDmiExposeProcessorInf, 0);
537	if (RT_FAILURE (rc))
538	return PDMDEV_SET_ERROR(pDevIns, rc,
539	N_("Configuration error: Failed to read \"DmiExposeProcInf\""));
540
541	for (;; fForceDefault = true, fHideErrors = false)
542	{
543	int iStrNr;
544	char szBuf[256];
545	char pszStr = (char )pTable;
546	char szDmiSystemUuid[64];
547	char *pszDmiSystemUuid;
548	const char *pszTmp;
549
550	if (fForceDefault)
551	pszDmiSystemUuid = NULL;
552	else
553	{
554	rc = CFGMR3QueryString(pCfg, "DmiSystemUuid", szDmiSystemUuid, sizeof(szDmiSystemUuid));
555	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
556	pszDmiSystemUuid = NULL;
557	else if (RT_FAILURE(rc))
558	{
559	if (fHideErrors)
560	{
561	LogRel(("Configuration error: Querying \"DmiSystemUuid\" as a string failed, using default DMI data\n"));
562	continue;
563	}
564	return PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
565	N_("Configuration error: Querying \"DmiSystemUuid\" as a string failed"));
566	}
567	else
568	pszDmiSystemUuid = szDmiSystemUuid;
569	}
570
571	/*********************************
572	* DMI BIOS information (Type 0) *
573	*********************************/
574	PDMIBIOSINF pBIOSInf = (PDMIBIOSINF)pszStr;
575	CHECKSIZE(sizeof(*pBIOSInf));
576
577	pszStr = (char *)&pBIOSInf->u8ReleaseMajor;
578	pBIOSInf->header.u8Length = RT_OFFSETOF(DMIBIOSINF, u8ReleaseMajor);
579
580	/* don't set these fields by default for legacy compatibility */
581	int iDmiBIOSReleaseMajor, iDmiBIOSReleaseMinor;
582	READCFGINT(iDmiBIOSReleaseMajor, DmiBIOSReleaseMajor);
583	READCFGINT(iDmiBIOSReleaseMinor, DmiBIOSReleaseMinor);
584	if (iDmiBIOSReleaseMajor != 0 \|\| iDmiBIOSReleaseMinor != 0)
585	{
586	pszStr = (char *)&pBIOSInf->u8FirmwareMajor;
587	pBIOSInf->header.u8Length = RT_OFFSETOF(DMIBIOSINF, u8FirmwareMajor);
588	pBIOSInf->u8ReleaseMajor = iDmiBIOSReleaseMajor;
589	pBIOSInf->u8ReleaseMinor = iDmiBIOSReleaseMinor;
590
591	int iDmiBIOSFirmwareMajor, iDmiBIOSFirmwareMinor;
592	READCFGINT(iDmiBIOSFirmwareMajor, DmiBIOSFirmwareMajor);
593	READCFGINT(iDmiBIOSFirmwareMinor, DmiBIOSFirmwareMinor);
594	if (iDmiBIOSFirmwareMajor != 0 \|\| iDmiBIOSFirmwareMinor != 0)
595	{
596	pszStr = (char *)(pBIOSInf + 1);
597	pBIOSInf->header.u8Length = sizeof(DMIBIOSINF);
598	pBIOSInf->u8FirmwareMajor = iDmiBIOSFirmwareMajor;
599	pBIOSInf->u8FirmwareMinor = iDmiBIOSFirmwareMinor;
600	}
601	}
602
603	iStrNr = 1;
604	pBIOSInf->header.u8Type = 0; /* BIOS Information */
605	pBIOSInf->header.u16Handle = 0x0000;
606	READCFGSTR(pBIOSInf->u8Vendor, DmiBIOSVendor);
607	READCFGSTR(pBIOSInf->u8Version, DmiBIOSVersion);
608	pBIOSInf->u16Start = 0xE000;
609	READCFGSTR(pBIOSInf->u8Release, DmiBIOSReleaseDate);
610	pBIOSInf->u8ROMSize = 1; /* 128K */
611	pBIOSInf->u64Characteristics = RT_BIT(4) /* ISA is supported */
612	\| RT_BIT(7) /* PCI is supported */
613	\| RT_BIT(15) /* Boot from CD is supported */
614	\| RT_BIT(16) /* Selectable Boot is supported */
615	\| RT_BIT(27) /* Int 9h, 8042 Keyboard services supported */
616	\| RT_BIT(30) /* Int 10h, CGA/Mono Video Services supported */
617	/* any more?? */
618	;
619	pBIOSInf->u8CharacteristicsByte1 = RT_BIT(0) /* ACPI is supported */
620	/* any more?? */
621	;
622	pBIOSInf->u8CharacteristicsByte2 = 0
623	/* any more?? */
624	;
625	TERM_STRUCT;
626
627	/***********************************
628	* DMI system information (Type 1) *
629	***********************************/
630	PDMISYSTEMINF pSystemInf = (PDMISYSTEMINF)pszStr;
631	CHECKSIZE(sizeof(*pSystemInf));
632	START_STRUCT(pSystemInf);
633	iStrNr = 1;
634	pSystemInf->header.u8Type = 1; /* System Information */
635	pSystemInf->header.u8Length = sizeof(*pSystemInf);
636	pSystemInf->header.u16Handle = 0x0001;
637	READCFGSTR(pSystemInf->u8Manufacturer, DmiSystemVendor);
638	READCFGSTR(pSystemInf->u8ProductName, DmiSystemProduct);
639	READCFGSTR(pSystemInf->u8Version, DmiSystemVersion);
640	READCFGSTR(pSystemInf->u8SerialNumber, DmiSystemSerial);
641
642	RTUUID uuid;
643	if (pszDmiSystemUuid)
644	{
645	rc = RTUuidFromStr(&uuid, pszDmiSystemUuid);
646	if (RT_FAILURE(rc))
647	{
648	if (fHideErrors)
649	{
650	LogRel(("Configuration error: Invalid UUID for DMI tables specified, using default DMI data\n"));
651	continue;
652	}
653	return PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
654	N_("Configuration error: Invalid UUID for DMI tables specified"));
655	}
656	uuid.Gen.u32TimeLow = RT_H2BE_U32(uuid.Gen.u32TimeLow);
657	uuid.Gen.u16TimeMid = RT_H2BE_U16(uuid.Gen.u16TimeMid);
658	uuid.Gen.u16TimeHiAndVersion = RT_H2BE_U16(uuid.Gen.u16TimeHiAndVersion);
659	pUuid = &uuid;
660	}
661	memcpy(pSystemInf->au8Uuid, pUuid, sizeof(RTUUID));
662
663	pSystemInf->u8WakeupType = 6; /* Power Switch */
664	READCFGSTR(pSystemInf->u8SKUNumber, DmiSystemSKU);
665	READCFGSTR(pSystemInf->u8Family, DmiSystemFamily);
666	TERM_STRUCT;
667
668	/**********************************
669	* DMI board information (Type 2) *
670	**********************************/
671	PDMIBOARDINF pBoardInf = (PDMIBOARDINF)pszStr;
672	CHECKSIZE(sizeof(*pBoardInf));
673	pszStr = (char *)(pBoardInf + 1);
674	iStrNr = 1;
675	int iDmiBoardBoardType;
676	pBoardInf->header.u8Type = 2; /* Board Information */
677	pBoardInf->header.u8Length = sizeof(*pBoardInf);
678	pBoardInf->header.u16Handle = 0x0008;
679	READCFGSTR(pBoardInf->u8Manufacturer, DmiBoardVendor);
680	READCFGSTR(pBoardInf->u8Product, DmiBoardProduct);
681	READCFGSTR(pBoardInf->u8Version, DmiBoardVersion);
682	READCFGSTR(pBoardInf->u8SerialNumber, DmiBoardSerial);
683	READCFGSTR(pBoardInf->u8AssetTag, DmiBoardAssetTag);
684	pBoardInf->u8FeatureFlags = RT_BIT(0) /* hosting board, e.g. motherboard */
685	;
686	READCFGSTR(pBoardInf->u8LocationInChass, DmiBoardLocInChass);
687	pBoardInf->u16ChassisHandle = 0x0003; /* see type 3 */
688	READCFGINT(iDmiBoardBoardType, DmiBoardBoardType);
689	pBoardInf->u8BoardType = iDmiBoardBoardType;
690	pBoardInf->u8cObjectHandles = 0;
691
692	TERM_STRUCT;
693
694	/********************************************
695	* DMI System Enclosure or Chassis (Type 3) *
696	********************************************/
697	PDMICHASSIS pChassis = (PDMICHASSIS)pszStr;
698	CHECKSIZE(sizeof(*pChassis));
699	pszStr = (char*)&pChassis->u32OEMdefined;
700	iStrNr = 1;
701	#ifdef VBOX_WITH_DMI_CHASSIS
702	pChassis->header.u8Type = 3; /* System Enclosure or Chassis */
703	#else
704	pChassis->header.u8Type = 0x7e; /* inactive */
705	#endif
706	pChassis->header.u8Length = RT_OFFSETOF(DMICHASSIS, u32OEMdefined);
707	pChassis->header.u16Handle = 0x0003;
708	READCFGSTR(pChassis->u8Manufacturer, DmiChassisVendor);
709	pChassis->u8Type = 0x01; /* ''other'', no chassis lock present */
710	READCFGSTR(pChassis->u8Version, DmiChassisVersion);
711	READCFGSTR(pChassis->u8SerialNumber, DmiChassisSerial);
712	READCFGSTR(pChassis->u8AssetTag, DmiChassisAssetTag);
713	pChassis->u8BootupState = 0x03; /* safe */
714	pChassis->u8PowerSupplyState = 0x03; /* safe */
715	pChassis->u8ThermalState = 0x03; /* safe */
716	pChassis->u8SecurityStatus = 0x03; /* none XXX */
717	# if 0
718	/* v2.3+, currently not supported */
719	pChassis->u32OEMdefined = 0;
720	pChassis->u8Height = 0; /* unspecified */
721	pChassis->u8NumPowerChords = 0; /* unspecified */
722	pChassis->u8ContElems = 0; /* no contained elements */
723	pChassis->u8ContElemRecLen = 0; /* no contained elements */
724	# endif
725	TERM_STRUCT;
726
727	/**************************************
728	* DMI Processor Information (Type 4) *
729	**************************************/
730
731	/*
732	* This is just a dummy processor. Should we expose the real guest CPU features
733	* here? Accessing this information at this point is difficult.
734	*/
735	char szSocket[32];
736	PDMIPROCESSORINF pProcessorInf = (PDMIPROCESSORINF)pszStr;
737	CHECKSIZE(sizeof(*pProcessorInf));
738	START_STRUCT(pProcessorInf);
739	iStrNr = 1;
740	if (fDmiExposeProcessorInf)
741	pProcessorInf->header.u8Type = 4; /* Processor Information */
742	else
743	pProcessorInf->header.u8Type = 126; /* inactive structure */
744	pProcessorInf->header.u8Length = sizeof(*pProcessorInf);
745	pProcessorInf->header.u16Handle = 0x0007;
746	RTStrPrintf(szSocket, sizeof(szSocket), "Socket #%u", 0);
747	pProcessorInf->u8SocketDesignation = iStrNr++;
748	{
749	size_t cStr = strlen(szSocket) + 1;
750	CHECKSIZE(cStr);
751	memcpy(pszStr, szSocket, cStr);
752	pszStr += cStr;
753	}
754	pProcessorInf->u8ProcessorType = 0x03; /* Central Processor */
755	pProcessorInf->u8ProcessorFamily = 0xB1; /* Pentium III with Intel SpeedStep(TM) */
756	READCFGSTR(pProcessorInf->u8ProcessorManufacturer, DmiProcManufacturer);
757
758	pProcessorInf->u64ProcessorID = UINT64_C(0x0FEBFBFF00010676);
759	/* Ext Family ID = 0
760	* Ext Model ID = 2
761	* Processor Type = 0
762	* Family ID = 6
763	* Model = 7
764	* Stepping = 6
765	* Features: FPU, VME, DE, PSE, TSC, MSR, PAE, MCE, CX8,
766	* APIC, SEP, MTRR, PGE, MCA, CMOV, PAT, PSE-36,
767	* CFLSH, DS, ACPI, MMX, FXSR, SSE, SSE2, SS */
768	READCFGSTR(pProcessorInf->u8ProcessorVersion, DmiProcVersion);
769	pProcessorInf->u8Voltage = 0x02; /* 3.3V */
770	pProcessorInf->u16ExternalClock = 0x00; /* unknown */
771	pProcessorInf->u16MaxSpeed = 3000; /* 3GHz */
772	pProcessorInf->u16CurrentSpeed = 3000; /* 3GHz */
773	pProcessorInf->u8Status = RT_BIT(6) /* CPU socket populated */
774	\| RT_BIT(0) /* CPU enabled */
775	;
776	pProcessorInf->u8ProcessorUpgrade = 0x04; /* ZIF Socket */
777	pProcessorInf->u16L1CacheHandle = 0x001C;
778	pProcessorInf->u16L2CacheHandle = 0x001D;
779	pProcessorInf->u16L3CacheHandle = 0xFFFF; /* unknown */
780	pProcessorInf->u8SerialNumber = 0; /* not specified */
781	pProcessorInf->u8AssetTag = 0; /* not specified */
782	pProcessorInf->u8PartNumber = 0; /* not specified */
783	pProcessorInf->u8CoreCount = cCpus; /* */
784	pProcessorInf->u8CoreEnabled = cCpus;
785	pProcessorInf->u8ThreadCount = 1;
786	pProcessorInf->u16ProcessorCharacteristics
787	= RT_BIT(2); /* 64-bit capable */
788	pProcessorInf->u16ProcessorFamily2 = 0;
789	TERM_STRUCT;
790
791	/***************************************
792	* DMI Physical Memory Array (Type 16) *
793	***************************************/
794	uint64_t u64RamSize;
795	rc = CFGMR3QueryU64(pCfg, "RamSize", &u64RamSize);
796	if (RT_FAILURE (rc))
797	return PDMDEV_SET_ERROR(pDevIns, rc,
798	N_("Configuration error: Failed to read \"RamSize\""));
799
800	PDMIRAMARRAY pMemArray = (PDMIRAMARRAY)pszStr;
801	CHECKSIZE(sizeof(*pMemArray));
802	START_STRUCT(pMemArray);
803	if (fDmiExposeMemoryTable)
804	pMemArray->header.u8Type = 16; /* Physical Memory Array */
805	else
806	pMemArray->header.u8Type = 126; /* inactive structure */
807	pMemArray->header.u8Length = sizeof(*pMemArray);
808	pMemArray->header.u16Handle = 0x0005;
809	pMemArray->u8Location = 0x03; /* Motherboard */
810	pMemArray->u8Use = 0x03; /* System memory */
811	pMemArray->u8MemErrorCorrection = 0x01; /* Other */
812	pMemArray->u32MaxCapacity = (uint32_t)(u64RamSize / _1K); /* RAM size in K */
813	pMemArray->u16MemErrorHandle = 0xfffe; /* No error info structure */
814	pMemArray->u16NumberOfMemDevices = 1;
815	TERM_STRUCT;
816
817	/***************************************
818	* DMI Memory Device (Type 17) *
819	***************************************/
820	PDMIMEMORYDEV pMemDev = (PDMIMEMORYDEV)pszStr;
821	CHECKSIZE(sizeof(*pMemDev));
822	START_STRUCT(pMemDev);
823	if (fDmiExposeMemoryTable)
824	pMemDev->header.u8Type = 17; /* Memory Device */
825	else
826	pMemDev->header.u8Type = 126; /* inactive structure */
827	pMemDev->header.u8Length = sizeof(*pMemDev);
828	pMemDev->header.u16Handle = 0x0006;
829	pMemDev->u16PhysMemArrayHandle = 0x0005; /* handle of array we belong to */
830	pMemDev->u16MemErrHandle = 0xfffe; /* system doesn't provide this information */
831	pMemDev->u16TotalWidth = 0xffff; /* Unknown */
832	pMemDev->u16DataWidth = 0xffff; /* Unknown */
833	int16_t u16RamSizeM = (uint16_t)(u64RamSize / _1M);
834	if (u16RamSizeM == 0)
835	u16RamSizeM = 0x400; /* 1G */
836	pMemDev->u16Size = u16RamSizeM; /* RAM size */
837	pMemDev->u8FormFactor = 0x09; /* DIMM */
838	pMemDev->u8DeviceSet = 0x00; /* Not part of a device set */
839	READCFGSTRDEF(pMemDev->u8DeviceLocator, " ", "DIMM 0");
840	READCFGSTRDEF(pMemDev->u8BankLocator, " ", "Bank 0");
841	pMemDev->u8MemoryType = 0x03; /* DRAM */
842	pMemDev->u16TypeDetail = 0; /* Nothing special */
843	pMemDev->u16Speed = 1600; /* Unknown, shall be speed in MHz */
844	READCFGSTR(pMemDev->u8Manufacturer, DmiSystemVendor);
845	READCFGSTRDEF(pMemDev->u8SerialNumber, " ", "00000000");
846	READCFGSTRDEF(pMemDev->u8AssetTag, " ", "00000000");
847	READCFGSTRDEF(pMemDev->u8PartNumber, " ", "00000000");
848	pMemDev->u8Attributes = 0; /* Unknown */
849	TERM_STRUCT;
850
851	/*****************************
852	* DMI OEM strings (Type 11) *
853	*****************************/
854	PDMIOEMSTRINGS pOEMStrings = (PDMIOEMSTRINGS)pszStr;
855	CHECKSIZE(sizeof(*pOEMStrings));
856	START_STRUCT(pOEMStrings);
857	iStrNr = 1;
858	#ifdef VBOX_WITH_DMI_OEMSTRINGS
859	pOEMStrings->header.u8Type = 0xb; /* OEM Strings */
860	#else
861	pOEMStrings->header.u8Type = 126; /* inactive structure */
862	#endif
863	pOEMStrings->header.u8Length = sizeof(*pOEMStrings);
864	pOEMStrings->header.u16Handle = 0x0002;
865	pOEMStrings->u8Count = 2;
866
867	char szTmp[64];
868	RTStrPrintf(szTmp, sizeof(szTmp), "vboxVer_%u.%u.%u",
869	RTBldCfgVersionMajor(), RTBldCfgVersionMinor(), RTBldCfgVersionBuild());
870	READCFGSTRDEF(pOEMStrings->u8VBoxVersion, "DmiOEMVBoxVer", szTmp);
871	RTStrPrintf(szTmp, sizeof(szTmp), "vboxRev_%u", RTBldCfgRevision());
872	READCFGSTRDEF(pOEMStrings->u8VBoxRevision, "DmiOEMVBoxRev", szTmp);
873	TERM_STRUCT;
874
875	/* End-of-table marker - includes padding to account for fixed table size. */
876	PDMIHDR pEndOfTable = (PDMIHDR)pszStr;
877	pszStr = (char *)(pEndOfTable + 1);
878	pEndOfTable->u8Type = 0x7f;
879
880	pEndOfTable->u8Length = sizeof(*pEndOfTable);
881	pEndOfTable->u16Handle = 0xFEFF;
882	*pcbDmiTables = ((uintptr_t)pszStr - (uintptr_t)pTable) + 2;
883
884	/* If more fields are added here, fix the size check in READCFGSTR */
885
886	/* Success! */
887	break;
888	}
889
890	#undef READCFGSTR
891	#undef READCFGINT
892	#undef CHECKSIZE
893	return VINF_SUCCESS;
894	}
895
896	/**
897	* Construct the SMBIOS and DMI headers table pointer at VM construction and
898	* reset.
899	*
900	* @param pDevIns The device instance data.
901	*/
902	void FwCommonPlantSmbiosAndDmiHdrs(PPDMDEVINS pDevIns)
903	{
904	struct
905	{
906	struct SMBIOSHDR smbios;
907	struct DMIMAINHDR dmi;
908	} aBiosHeaders =
909	{
910	// The SMBIOS header
911	{
912	{ 0x5f, 0x53, 0x4d, 0x5f}, // "_SM_" signature
913	0x00, // checksum
914	0x1f, // EPS length, defined by standard
915	VBOX_SMBIOS_MAJOR_VER, // SMBIOS major version
916	VBOX_SMBIOS_MINOR_VER, // SMBIOS minor version
917	VBOX_SMBIOS_MAXSS, // Maximum structure size
918	0x00, // Entry point revision
919	{ 0x00, 0x00, 0x00, 0x00, 0x00 } // padding
920	},
921	// The DMI header
922	{
923	{ 0x5f, 0x44, 0x4d, 0x49, 0x5f }, // "_DMI_" signature
924	0x00, // checksum
925	VBOX_DMI_TABLE_SIZE, // DMI tables length
926	VBOX_DMI_TABLE_BASE, // DMI tables base
927	VBOX_DMI_TABLE_ENTR, // DMI tables entries
928	VBOX_DMI_TABLE_VER, // DMI version
929	}
930	};
931
932	aBiosHeaders.smbios.u8Checksum = fwCommonChecksum((uint8_t*)&aBiosHeaders.smbios, sizeof(aBiosHeaders.smbios));
933	aBiosHeaders.dmi.u8Checksum = fwCommonChecksum((uint8_t*)&aBiosHeaders.dmi, sizeof(aBiosHeaders.dmi));
934
935	PDMDevHlpPhysWrite(pDevIns, 0xfe300, &aBiosHeaders, sizeof(aBiosHeaders));
936	}
937	AssertCompile(VBOX_DMI_TABLE_ENTR == 9);
938
939	/**
940	* Construct the MPS table for implanting as a ROM page.
941	*
942	* Only applicable if IOAPIC is active!
943	*
944	* See ``MultiProcessor Specification Version 1.4 (May 1997)'':
945	* ``1.3 Scope
946	* ...
947	* The hardware required to implement the MP specification is kept to a
948	* minimum, as follows:
949	* * One or more processors that are Intel architecture instruction set
950	* compatible, such as the CPUs in the Intel486 or Pentium processor
951	* family.
952	* * One or more APICs, such as the Intel 82489DX Advanced Programmable
953	* Interrupt Controller or the integrated APIC, such as that on the
954	* Intel Pentium 735\\90 and 815\\100 processors, together with a discrete
955	* I/O APIC unit.''
956	* and later:
957	* ``4.3.3 I/O APIC Entries
958	* The configuration table contains one or more entries for I/O APICs.
959	* ...
960	* I/O APIC FLAGS: EN 3:0 1 If zero, this I/O APIC is unusable, and the
961	* operating system should not attempt to access
962	* this I/O APIC.
963	* At least one I/O APIC must be enabled.''
964	*
965	* @param pDevIns The device instance data.
966	* @param pTable Where to write the table.
967	* @param cbMax The maximum size of the MPS table.
968	* @param cCpus The number of guest CPUs.
969	*/
970	void FwCommonPlantMpsTable(PPDMDEVINS pDevIns, uint8_t *pTable, unsigned cbMax, uint16_t cCpus)
971	{
972	/* configuration table */
973	PMPSCFGTBLHEADER pCfgTab = (MPSCFGTBLHEADER*)pTable;
974	memcpy(pCfgTab->au8Signature, "PCMP", 4);
975	pCfgTab->u8SpecRev = 4; /* 1.4 */
976	memcpy(pCfgTab->au8OemId, "VBOXCPU ", 8);
977	memcpy(pCfgTab->au8ProductId, "VirtualBox ", 12);
978	pCfgTab->u32OemTablePtr = 0;
979	pCfgTab->u16OemTableSize = 0;
980	pCfgTab->u16EntryCount = 0; /* Incremented as we go. */
981	pCfgTab->u32AddrLocalApic = 0xfee00000;
982	pCfgTab->u16ExtTableLength = 0;
983	pCfgTab->u8ExtTableChecksum = 0;
984	pCfgTab->u8Reserved = 0;
985
986	uint32_t u32Eax, u32Ebx, u32Ecx, u32Edx;
987	uint32_t u32CPUSignature = 0x0520; /* default: Pentium 100 */
988	uint32_t u32FeatureFlags = 0x0001; /* default: FPU */
989	PDMDevHlpGetCpuId(pDevIns, 0, &u32Eax, &u32Ebx, &u32Ecx, &u32Edx);
990	if (u32Eax >= 1)
991	{
992	PDMDevHlpGetCpuId(pDevIns, 1, &u32Eax, &u32Ebx, &u32Ecx, &u32Edx);
993	u32CPUSignature = u32Eax & 0xfff;
994	/* Local APIC will be enabled later so override it here. Since we provide
995	* an MP table we have an IOAPIC and therefore a Local APIC. */
996	u32FeatureFlags = u32Edx \| X86_CPUID_FEATURE_EDX_APIC;
997	}
998	/* Construct MPS table for each VCPU. */
999	PMPSPROCENTRY pProcEntry = (PMPSPROCENTRY)(pCfgTab+1);
1000	for (int i = 0; i < cCpus; i++)
1001	{
1002	pProcEntry->u8EntryType = 0; /* processor entry */
1003	pProcEntry->u8LocalApicId = i;
1004	pProcEntry->u8LocalApicVersion = 0x14;
1005	pProcEntry->u8CPUFlags = (i == 0 ? 2 /* bootstrap processor / : 0 / application processor /) \| 1 / enabled */;
1006	pProcEntry->u32CPUSignature = u32CPUSignature;
1007	pProcEntry->u32CPUFeatureFlags = u32FeatureFlags;
1008	pProcEntry->u32Reserved[0] =
1009	pProcEntry->u32Reserved[1] = 0;
1010	pProcEntry++;
1011	pCfgTab->u16EntryCount++;
1012	}
1013
1014	uint32_t iBusIdIsa = 0;
1015	uint32_t iBusIdPci0 = 1;
1016
1017	/* ISA bus */
1018	PMPSBUSENTRY pBusEntry = (PMPSBUSENTRY)pProcEntry;
1019	pBusEntry->u8EntryType = 1; /* bus entry */
1020	pBusEntry->u8BusId = iBusIdIsa; /* this ID is referenced by the interrupt entries */
1021	memcpy(pBusEntry->au8BusTypeStr, "ISA ", 6);
1022	pBusEntry++;
1023	pCfgTab->u16EntryCount++;
1024
1025	/* PCI bus */
1026	pBusEntry->u8EntryType = 1; /* bus entry */
1027	pBusEntry->u8BusId = iBusIdPci0; /* this ID can be referenced by the interrupt entries */
1028	memcpy(pBusEntry->au8BusTypeStr, "PCI ", 6);
1029	pCfgTab->u16EntryCount++;
1030
1031
1032	/* I/O-APIC.
1033	* MP spec: "The configuration table contains one or more entries for I/O APICs.
1034	* ... At least one I/O APIC must be enabled." */
1035	PMPSIOAPICENTRY pIOAPICEntry = (PMPSIOAPICENTRY)(pBusEntry+1);
1036	uint16_t iApicId = 0;
1037	pIOAPICEntry->u8EntryType = 2; /* I/O-APIC entry */
1038	pIOAPICEntry->u8Id = iApicId; /* this ID is referenced by the interrupt entries */
1039	pIOAPICEntry->u8Version = 0x11;
1040	pIOAPICEntry->u8Flags = 1 /* enable */;
1041	pIOAPICEntry->u32Addr = 0xfec00000;
1042	pCfgTab->u16EntryCount++;
1043
1044	/* Interrupt tables */
1045	/* Bus vectors */
1046	/* Note: The PIC is currently not routed to the I/O APIC. Therefore we skip
1047	* pin 0 on the I/O APIC.
1048	*/
1049	PMPSIOIRQENTRY pIrqEntry = (PMPSIOIRQENTRY)(pIOAPICEntry+1);
1050	for (int iPin = 1; iPin < 16; iPin++, pIrqEntry++)
1051	{
1052	pIrqEntry->u8EntryType = 3; /* I/O interrupt entry */
1053	/*
1054	* 0 - INT, vectored interrupt,
1055	* 3 - ExtINT, vectored interrupt provided by PIC
1056	* As we emulate system with both APIC and PIC, it's needed for their coexistence.
1057	*/
1058	pIrqEntry->u8Type = (iPin == 0) ? 3 : 0;
1059	pIrqEntry->u16Flags = 0; /* polarity of APIC I/O input signal = conforms to bus,
1060	trigger mode = conforms to bus */
1061	pIrqEntry->u8SrcBusId = iBusIdIsa; /* ISA bus */
1062	/* IRQ0 mapped to pin 2, other are identity mapped */
1063	/* If changing, also update PDMIsaSetIrq() and MADT */
1064	pIrqEntry->u8SrcBusIrq = (iPin == 2) ? 0 : iPin; /* IRQ on the bus */
1065	pIrqEntry->u8DstIOAPICId = iApicId; /* destination IO-APIC */
1066	pIrqEntry->u8DstIOAPICInt = iPin; /* pin on destination IO-APIC */
1067	pCfgTab->u16EntryCount++;
1068	}
1069	/* Local delivery */
1070	pIrqEntry->u8EntryType = 4; /* Local interrupt entry */
1071	pIrqEntry->u8Type = 3; /* ExtINT */
1072	pIrqEntry->u16Flags = (1 << 2) \| 1; /* active-high, edge-triggered */
1073	pIrqEntry->u8SrcBusId = iBusIdIsa;
1074	pIrqEntry->u8SrcBusIrq = 0;
1075	pIrqEntry->u8DstIOAPICId = 0xff;
1076	pIrqEntry->u8DstIOAPICInt = 0;
1077	pIrqEntry++;
1078	pCfgTab->u16EntryCount++;
1079	pIrqEntry->u8EntryType = 4; /* Local interrupt entry */
1080	pIrqEntry->u8Type = 1; /* NMI */
1081	pIrqEntry->u16Flags = (1 << 2) \| 1; /* active-high, edge-triggered */
1082	pIrqEntry->u8SrcBusId = iBusIdIsa;
1083	pIrqEntry->u8SrcBusIrq = 0;
1084	pIrqEntry->u8DstIOAPICId = 0xff;
1085	pIrqEntry->u8DstIOAPICInt = 1;
1086	pIrqEntry++;
1087	pCfgTab->u16EntryCount++;
1088
1089	pCfgTab->u16Length = (uint8_t*)pIrqEntry - pTable;
1090	pCfgTab->u8Checksum = fwCommonChecksum(pTable, pCfgTab->u16Length);
1091
1092	AssertMsg(pCfgTab->u16Length < cbMax,
1093	("VBOX_MPS_TABLE_SIZE=%d, maximum allowed size is %d",
1094	pCfgTab->u16Length, cbMax));
1095	}
1096
1097	/**
1098	* Construct the MPS table pointer at VM construction and reset.
1099	*
1100	* Only applicable if IOAPIC is active!
1101	*
1102	* @param pDevIns The device instance data.
1103	*/
1104	void FwCommonPlantMpsFloatPtr(PPDMDEVINS pDevIns)
1105	{
1106	MPSFLOATPTR floatPtr;
1107	floatPtr.au8Signature[0] = '_';
1108	floatPtr.au8Signature[1] = 'M';
1109	floatPtr.au8Signature[2] = 'P';
1110	floatPtr.au8Signature[3] = '_';
1111	floatPtr.u32MPSAddr = VBOX_MPS_TABLE_BASE;
1112	floatPtr.u8Length = 1; /* structure size in paragraphs */
1113	floatPtr.u8SpecRev = 4; /* MPS revision 1.4 */
1114	floatPtr.u8Checksum = 0;
1115	floatPtr.au8Feature[0] = 0;
1116	floatPtr.au8Feature[1] = 0;
1117	floatPtr.au8Feature[2] = 0;
1118	floatPtr.au8Feature[3] = 0;
1119	floatPtr.au8Feature[4] = 0;
1120	floatPtr.u8Checksum = fwCommonChecksum((uint8_t*)&floatPtr, 16);
1121	PDMDevHlpPhysWrite(pDevIns, 0x9fff0, &floatPtr, 16);
1122	}

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source: vbox/trunk/src/VBox/Devices/PC/DevFwCommon.cpp@ 41087

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