DevPcBios.cpp@ 68155

Last change on this file since 68155 was 67585, checked in by vboxsync, 7 years ago
DevEFI/DevACPI/DevPcBios: bugref:8768: necessary adaptions of the PCI memory hole according to r113565 (2MB => 32MB)
Property svn:eol-style set to `native` Property svn:keywords set to `Id Revision`
File size: 64.7 KB

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1	/* $Id: DevPcBios.cpp 67585 2017-06-23 15:29:50Z vboxsync $ */
2	/** @file
3	* DevPcBios - PC BIOS Device.
4	*/
5
6	/*
7	* Copyright (C) 2006-2017 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	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#define LOG_GROUP LOG_GROUP_DEV_PC_BIOS
23	#include <VBox/vmm/pdmdev.h>
24	#include <VBox/vmm/pdmstorageifs.h>
25	#include <VBox/vmm/mm.h>
26	#include <VBox/vmm/pgm.h>
27	#include <VBox/vmm/cpum.h>
28	#include <VBox/vmm/vm.h>
29
30	#include <VBox/log.h>
31	#include <iprt/asm.h>
32	#include <iprt/assert.h>
33	#include <iprt/buildconfig.h>
34	#include <iprt/file.h>
35	#include <iprt/mem.h>
36	#include <iprt/string.h>
37	#include <iprt/uuid.h>
38	#include <iprt/cdefs.h>
39	#include <VBox/bios.h>
40	#include <VBox/err.h>
41	#include <VBox/param.h>
42
43	#include "VBoxDD.h"
44	#include "VBoxDD2.h"
45	#include "DevPcBios.h"
46	#include "DevFwCommon.h"
47
48	#define NET_BOOT_DEVS 4
49
50
51	/** @page pg_devbios_cmos_assign CMOS Assignments (BIOS)
52	*
53	* The BIOS uses a CMOS to store configuration data.
54	* It is currently used as follows:
55	*
56	* @verbatim
57	First CMOS bank (offsets 0x00 to 0x7f):
58	Floppy drive type:
59	0x10
60	Hard disk type (old):
61	0x12
62	Equipment byte:
63	0x14
64	Base memory:
65	0x15
66	0x16
67	Extended memory:
68	0x17
69	0x18
70	0x30
71	0x31
72	First IDE HDD:
73	0x19
74	0x1e - 0x25
75	Second IDE HDD:
76	0x1a
77	0x26 - 0x2d
78	Checksum of 0x10-0x2d:
79	0x2e
80	0x2f
81	Amount of memory above 16M and below 4GB in 64KB units:
82	0x34
83	0x35
84	Boot device (BOCHS BIOS specific):
85	0x38
86	0x3c
87	0x3d
88	PXE debug:
89	0x3f
90	First SATA HDD:
91	0x40 - 0x47
92	Second SATA HDD:
93	0x48 - 0x4f
94	Third SATA HDD:
95	0x50 - 0x57
96	Fourth SATA HDD:
97	0x58 - 0x5f
98	Number of CPUs:
99	0x60
100	RAM above 4G in 64KB units:
101	0x61 - 0x65
102	Third IDE HDD:
103	0x67 - 0x6e
104	Fourth IDE HDD:
105	0x70 - 0x77
106	APIC/x2APIC settings:
107	0x78
108
109	Second CMOS bank (offsets 0x80 to 0xff):
110	Reserved for internal use by PXE ROM:
111	0x80 - 0x81
112	First net boot device PCI bus/dev/fn:
113	0x82 - 0x83
114	Second to third net boot devices:
115	0x84 - 0x89
116	First SCSI HDD:
117	0x90 - 0x97
118	Second SCSI HDD:
119	0x98 - 0x9f
120	Third SCSI HDD:
121	0xa0 - 0xa7
122	Fourth SCSI HDD:
123	0xa8 - 0xaf
124
125	@endverbatim
126	*
127	* @todo Mark which bits are compatible with which BIOSes and
128	* which are our own definitions.
129	*/
130
131
132	/*********************************************************************************************************************************
133	* Structures and Typedefs *
134	*********************************************************************************************************************************/
135
136	/**
137	* The boot device.
138	*/
139	typedef enum DEVPCBIOSBOOT
140	{
141	DEVPCBIOSBOOT_NONE,
142	DEVPCBIOSBOOT_FLOPPY,
143	DEVPCBIOSBOOT_HD,
144	DEVPCBIOSBOOT_DVD,
145	DEVPCBIOSBOOT_LAN
146	} DEVPCBIOSBOOT;
147
148	/**
149	* PC Bios instance data structure.
150	*/
151	typedef struct DEVPCBIOS
152	{
153	/** Pointer back to the device instance. */
154	PPDMDEVINS pDevIns;
155
156	/** Boot devices (ordered). */
157	DEVPCBIOSBOOT aenmBootDevice[4];
158	/** Bochs shutdown index. */
159	uint32_t iShutdown;
160	/** Floppy device. */
161	char *pszFDDevice;
162	/** Harddisk device. */
163	char *pszHDDevice;
164	/** Sata harddisk device. */
165	char *pszSataDevice;
166	/** LUNs of the four BIOS-accessible SATA disks. */
167	uint32_t iSataHDLUN[4];
168	/** SCSI harddisk device. */
169	char *pszScsiDevice;
170	/** LUNs of the four BIOS-accessible SCSI disks. */
171	uint32_t iScsiHDLUN[4];
172	/** Bios message buffer. */
173	char szMsg[256];
174	/** Bios message buffer index. */
175	uint32_t iMsg;
176	/** The system BIOS ROM data. */
177	uint8_t *pu8PcBios;
178	/** The size of the system BIOS ROM. */
179	uint32_t cbPcBios;
180	/** The name of the BIOS ROM file. */
181	char *pszPcBiosFile;
182	/** The LAN boot ROM data. */
183	uint8_t *pu8LanBoot;
184	/** The name of the LAN boot ROM file. */
185	char *pszLanBootFile;
186	/** The size of the LAN boot ROM. */
187	uint64_t cbLanBoot;
188	/** The DMI tables. */
189	uint8_t au8DMIPage[0x1000];
190	/** The boot countdown (in seconds). */
191	uint8_t uBootDelay;
192	/** I/O-APIC enabled? */
193	uint8_t u8IOAPIC;
194	/** APIC mode to be set up by BIOS */
195	uint8_t u8APICMode;
196	/** PXE debug logging enabled? */
197	uint8_t u8PXEDebug;
198	/** PXE boot PCI bus/dev/fn list. */
199	uint16_t au16NetBootDev[NET_BOOT_DEVS];
200	/** Number of logical CPUs in guest */
201	uint16_t cCpus;
202	/* Physical address of PCI config space MMIO region. Currently unused. */
203	uint64_t u64McfgBase;
204	/* Length of PCI config space MMIO region. Currently unused. */
205	uint64_t cbMcfgLength;
206
207	/** Firmware registration structure. */
208	PDMFWREG FwReg;
209	/** Dummy. */
210	PCPDMFWHLPR3 pFwHlpR3;
211	/** Whether to consult the shutdown status (CMOS[0xf]) for deciding upon soft
212	* or hard reset. */
213	bool fCheckShutdownStatusForSoftReset;
214	/** Whether to clear the shutdown status on hard reset. */
215	bool fClearShutdownStatusOnHardReset;
216	/** Number of soft resets we've logged. */
217	uint32_t cLoggedSoftResets;
218	/** Current port number for Bochs shutdown (used by APM). */
219	RTIOPORT ShutdownPort;
220	/** True=use new port number for Bochs shutdown (used by APM). */
221	bool fNewShutdownPort;
222	} DEVPCBIOS;
223	/** Pointer to the BIOS device state. */
224	typedef DEVPCBIOS *PDEVPCBIOS;
225
226
227	/*********************************************************************************************************************************
228	* Defined Constants And Macros *
229	*********************************************************************************************************************************/
230	/** The saved state version. */
231	#define PCBIOS_SSM_VERSION 0
232
233
234	/*********************************************************************************************************************************
235	* Global Variables *
236	*********************************************************************************************************************************/
237	/** Saved state DEVPCBIOS field descriptors. */
238	static SSMFIELD const g_aPcBiosFields[] =
239	{
240	SSMFIELD_ENTRY( DEVPCBIOS, fNewShutdownPort),
241	SSMFIELD_ENTRY_TERM()
242	};
243
244
245	/**
246	* @callback_method_impl{FNIOMIOPORTIN, Bochs Debug and Shutdown ports.}
247	*/
248	static DECLCALLBACK(int) pcbiosIOPortRead(PPDMDEVINS pDevIns, void pvUser, RTIOPORT Port, uint32_t pu32, unsigned cb)
249	{
250	RT_NOREF5(pDevIns, pvUser, Port, pu32, cb);
251	return VERR_IOM_IOPORT_UNUSED;
252	}
253
254
255	/**
256	* @callback_method_impl{FNIOMIOPORTOUT, Bochs Debug and Shutdown ports.}
257	*/
258	static DECLCALLBACK(int) pcbiosIOPortWrite(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT Port, uint32_t u32, unsigned cb)
259	{
260	RT_NOREF1(pvUser);
261	PDEVPCBIOS pThis = PDMINS_2_DATA(pDevIns, PDEVPCBIOS);
262
263	/*
264	* Bochs BIOS char printing.
265	*/
266	if ( cb == 1
267	&& ( Port == 0x402
268	\|\| Port == 0x403))
269	{
270	/* The raw version. */
271	switch (u32)
272	{
273	case '\r': Log2(("pcbios: <return>\n")); break;
274	case '\n': Log2(("pcbios: <newline>\n")); break;
275	case '\t': Log2(("pcbios: <tab>\n")); break;
276	default: Log2(("pcbios: %c (%02x)\n", u32, u32)); break;
277	}
278
279	/* The readable, buffered version. */
280	if (u32 == '\n' \|\| u32 == '\r')
281	{
282	pThis->szMsg[pThis->iMsg] = '\0';
283	if (pThis->iMsg)
284	Log(("pcbios: %s\n", pThis->szMsg));
285	pThis->iMsg = 0;
286	}
287	else
288	{
289	if (pThis->iMsg >= sizeof(pThis->szMsg)-1)
290	{
291	pThis->szMsg[pThis->iMsg] = '\0';
292	Log(("pcbios: %s\n", pThis->szMsg));
293	pThis->iMsg = 0;
294	}
295	pThis->szMsg[pThis->iMsg] = (char )u32;
296	pThis->szMsg[++pThis->iMsg] = '\0';
297	}
298	return VINF_SUCCESS;
299	}
300
301	/*
302	* Bochs BIOS shutdown request.
303	*/
304	if (cb == 1 && Port == pThis->ShutdownPort)
305	{
306	static const unsigned char szShutdown[] = "Shutdown";
307	if (u32 == szShutdown[pThis->iShutdown])
308	{
309	pThis->iShutdown++;
310	if (pThis->iShutdown == 8)
311	{
312	pThis->iShutdown = 0;
313	LogRel(("PcBios: APM shutdown request\n"));
314	return PDMDevHlpVMPowerOff(pDevIns);
315	}
316	}
317	else
318	pThis->iShutdown = 0;
319	return VINF_SUCCESS;
320	}
321
322	/* not in use. */
323	return VINF_SUCCESS;
324	}
325
326
327	/**
328	* Register the Bochs shutdown port.
329	* This is used by pcbiosConstruct, pcbiosReset and pcbiosLoadExec.
330	*/
331	static int pcbiosRegisterShutdown(PPDMDEVINS pDevIns, PDEVPCBIOS pThis, bool fNewShutdownPort)
332	{
333	if (pThis->ShutdownPort != 0)
334	{
335	int rc = PDMDevHlpIOPortDeregister(pDevIns, pThis->ShutdownPort, 1);
336	AssertRC(rc);
337	}
338	pThis->fNewShutdownPort = fNewShutdownPort;
339	if (fNewShutdownPort)
340	pThis->ShutdownPort = VBOX_BIOS_SHUTDOWN_PORT;
341	else
342	pThis->ShutdownPort = VBOX_BIOS_OLD_SHUTDOWN_PORT;
343	return PDMDevHlpIOPortRegister(pDevIns, pThis->ShutdownPort, 1, NULL,
344	pcbiosIOPortWrite, pcbiosIOPortRead,
345	NULL, NULL, "Bochs PC BIOS - Shutdown");
346	}
347
348
349	/**
350	* @callback_method_impl{FNSSMDEVSAVEEXEC}
351	*/
352	static DECLCALLBACK(int) pcbiosSaveExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM)
353	{
354	PDEVPCBIOS pThis = PDMINS_2_DATA(pDevIns, PDEVPCBIOS);
355	SSMR3PutStruct(pSSM, pThis, g_aPcBiosFields);
356	return VINF_SUCCESS;
357	}
358
359
360	/**
361	* @callback_method_impl{FNSSMDEVLOADPREP,
362	* Clears the fNewShutdownPort flag prior to loading the state so that old
363	* saved VM states keeps using the old port address (no pcbios state)}
364	*/
365	static DECLCALLBACK(int) pcbiosLoadPrep(PPDMDEVINS pDevIns, PSSMHANDLE pSSM)
366	{
367	RT_NOREF(pSSM);
368	PDEVPCBIOS pThis = PDMINS_2_DATA(pDevIns, PDEVPCBIOS);
369
370	/* Since there are legacy saved state files without any SSM data for PCBIOS
371	* this is the only way to handle them correctly. */
372	pThis->fNewShutdownPort = false;
373
374	return VINF_SUCCESS;
375	}
376
377
378	/**
379	* @callback_method_impl{FNSSMDEVLOADEXEC}
380	*/
381	static DECLCALLBACK(int) pcbiosLoadExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
382	{
383	PDEVPCBIOS pThis = PDMINS_2_DATA(pDevIns, PDEVPCBIOS);
384
385	if (uVersion > PCBIOS_SSM_VERSION)
386	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
387	Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
388
389	return SSMR3GetStruct(pSSM, pThis, g_aPcBiosFields);
390	}
391
392
393	/**
394	* @callback_method_impl{FNSSMDEVLOADDONE,
395	* Updates the shutdown port registration to match the flag loaded (or not).}
396	*/
397	static DECLCALLBACK(int) pcbiosLoadDone(PPDMDEVINS pDevIns, PSSMHANDLE pSSM)
398	{
399	RT_NOREF(pSSM);
400	PDEVPCBIOS pThis = PDMINS_2_DATA(pDevIns, PDEVPCBIOS);
401	return pcbiosRegisterShutdown(pDevIns, pThis, pThis->fNewShutdownPort);
402	}
403
404
405	/**
406	* Write to CMOS memory.
407	* This is used by the init complete code.
408	*/
409	static void pcbiosCmosWrite(PPDMDEVINS pDevIns, int off, uint32_t u32Val)
410	{
411	Assert(off < 256);
412	Assert(u32Val < 256);
413
414	int rc = PDMDevHlpCMOSWrite(pDevIns, off, u32Val);
415	AssertRC(rc);
416	}
417
418
419	/**
420	* Read from CMOS memory.
421	* This is used by the init complete code.
422	*/
423	static uint8_t pcbiosCmosRead(PPDMDEVINS pDevIns, unsigned off)
424	{
425	Assert(off < 256);
426
427	uint8_t u8val;
428	int rc = PDMDevHlpCMOSRead(pDevIns, off, &u8val);
429	AssertRC(rc);
430
431	return u8val;
432	}
433
434
435	/**
436	* @interface_method_impl{PDMFWREG,pfnIsHardReset}
437	*/
438	static DECLCALLBACK(bool) pcbiosFw_IsHardReset(PPDMDEVINS pDevIns, uint32_t fFlags)
439	{
440	RT_NOREF1(fFlags);
441	PDEVPCBIOS pThis = PDMINS_2_DATA(pDevIns, PDEVPCBIOS);
442	if (pThis->fCheckShutdownStatusForSoftReset)
443	{
444	uint8_t bShutdownStatus = pcbiosCmosRead(pDevIns, 0xf);
445	if ( bShutdownStatus == 0x5
446	\|\| bShutdownStatus == 0x9
447	\|\| bShutdownStatus == 0xa)
448	{
449	const uint32_t cMaxLogged = 10;
450	if (pThis->cLoggedSoftResets < cMaxLogged)
451	{
452	RTFAR16 Far16 = { 0xfeed, 0xface };
453	PDMDevHlpPhysRead(pDevIns, 0x467, &Far16, sizeof(Far16));
454	pThis->cLoggedSoftResets++;
455	LogRel(("PcBios: Soft reset #%u - shutdown status %#x, warm reset vector (0040:0067) is %04x:%04x%s\n",
456	pThis->cLoggedSoftResets, bShutdownStatus, Far16.sel, Far16.sel,
457	pThis->cLoggedSoftResets < cMaxLogged ? "." : " - won't log any more!"));
458	}
459	return false;
460	}
461	}
462	return true;
463	}
464
465
466	/**
467	* @interface_method_impl{PDMDEVREG,pfnReset}
468	*/
469	static DECLCALLBACK(void) pcbiosReset(PPDMDEVINS pDevIns)
470	{
471	PDEVPCBIOS pThis = PDMINS_2_DATA(pDevIns, PDEVPCBIOS);
472
473	if (pThis->fClearShutdownStatusOnHardReset)
474	{
475	uint8_t bShutdownStatus = pcbiosCmosRead(pDevIns, 0xf);
476	if (bShutdownStatus != 0)
477	{
478	LogRel(("PcBios: Clearing shutdown status code %02x.\n", bShutdownStatus));
479	pcbiosCmosWrite(pDevIns, 0xf, 0);
480	}
481	}
482
483	/* After reset the new BIOS code is active, use the new shutdown port. */
484	pcbiosRegisterShutdown(pDevIns, pThis, true /* fNewShutdownPort */);
485	}
486
487
488	/**
489	* Attempt to guess the LCHS disk geometry from the MS-DOS master boot record
490	* (partition table).
491	*
492	* @returns VBox status code.
493	* @param pMedia The media device interface of the disk.
494	* @param pLCHSGeometry Where to return the disk geometry on success
495	*/
496	static int biosGuessDiskLCHS(PPDMIMEDIA pMedia, PPDMMEDIAGEOMETRY pLCHSGeometry)
497	{
498	uint8_t aMBR[512], *p;
499	int rc;
500	uint32_t iEndHead, iEndSector, cLCHSCylinders, cLCHSHeads, cLCHSSectors;
501
502	if (!pMedia)
503	return VERR_INVALID_PARAMETER;
504	rc = pMedia->pfnReadPcBios(pMedia, 0, aMBR, sizeof(aMBR));
505	if (RT_FAILURE(rc))
506	return rc;
507	/* Test MBR magic number. */
508	if (aMBR[510] != 0x55 \|\| aMBR[511] != 0xaa)
509	return VERR_INVALID_PARAMETER;
510	for (uint32_t i = 0; i < 4; i++)
511	{
512	/* Figure out the start of a partition table entry. */
513	p = &aMBR[0x1be + i * 16];
514	iEndHead = p[5];
515	iEndSector = p[6] & 63;
516	if ((p[12] \| p[13] \| p[14] \| p[15]) && iEndSector & iEndHead)
517	{
518	/* Assumption: partition terminates on a cylinder boundary. */
519	cLCHSHeads = iEndHead + 1;
520	cLCHSSectors = iEndSector;
521	cLCHSCylinders = RT_MIN(1024, pMedia->pfnGetSize(pMedia) / (512 * cLCHSHeads * cLCHSSectors));
522	if (cLCHSCylinders >= 1)
523	{
524	pLCHSGeometry->cCylinders = cLCHSCylinders;
525	pLCHSGeometry->cHeads = cLCHSHeads;
526	pLCHSGeometry->cSectors = cLCHSSectors;
527	Log(("%s: LCHS=%d %d %d\n", __FUNCTION__, cLCHSCylinders, cLCHSHeads, cLCHSSectors));
528	return VINF_SUCCESS;
529	}
530	}
531	}
532	return VERR_INVALID_PARAMETER;
533	}
534
535
536	/**
537	* Initializes the CMOS data for one harddisk.
538	*/
539	static void pcbiosCmosInitHardDisk(PPDMDEVINS pDevIns, int offType, int offInfo, PCPDMMEDIAGEOMETRY pLCHSGeometry)
540	{
541	Log2(("%s: offInfo=%#x: LCHS=%d/%d/%d\n", __FUNCTION__, offInfo, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
542	if (offType)
543	pcbiosCmosWrite(pDevIns, offType, 47);
544	/* Cylinders low */
545	pcbiosCmosWrite(pDevIns, offInfo + 0, RT_MIN(pLCHSGeometry->cCylinders, 1024) & 0xff);
546	/* Cylinders high */
547	pcbiosCmosWrite(pDevIns, offInfo + 1, RT_MIN(pLCHSGeometry->cCylinders, 1024) >> 8);
548	/* Heads */
549	pcbiosCmosWrite(pDevIns, offInfo + 2, pLCHSGeometry->cHeads);
550	/* Landing zone low */
551	pcbiosCmosWrite(pDevIns, offInfo + 3, 0xff);
552	/* Landing zone high */
553	pcbiosCmosWrite(pDevIns, offInfo + 4, 0xff);
554	/* Write precomp low */
555	pcbiosCmosWrite(pDevIns, offInfo + 5, 0xff);
556	/* Write precomp high */
557	pcbiosCmosWrite(pDevIns, offInfo + 6, 0xff);
558	/* Sectors */
559	pcbiosCmosWrite(pDevIns, offInfo + 7, pLCHSGeometry->cSectors);
560	}
561
562
563	/**
564	* Set logical CHS geometry for a hard disk
565	*
566	* @returns VBox status code.
567	* @param pBase Base interface for the device.
568	* @param pHardDisk The hard disk.
569	* @param pLCHSGeometry Where to store the geometry settings.
570	*/
571	static int setLogicalDiskGeometry(PPDMIBASE pBase, PPDMIMEDIA pHardDisk, PPDMMEDIAGEOMETRY pLCHSGeometry)
572	{
573	RT_NOREF1(pBase);
574
575	PDMMEDIAGEOMETRY LCHSGeometry;
576	int rc = pHardDisk->pfnBiosGetLCHSGeometry(pHardDisk, &LCHSGeometry);
577	if ( rc == VERR_PDM_GEOMETRY_NOT_SET
578	\|\| LCHSGeometry.cCylinders == 0
579	\|\| LCHSGeometry.cHeads == 0
580	\|\| LCHSGeometry.cHeads > 255
581	\|\| LCHSGeometry.cSectors == 0
582	\|\| LCHSGeometry.cSectors > 63)
583	{
584	/* No LCHS geometry, autodetect and set. */
585	rc = biosGuessDiskLCHS(pHardDisk, &LCHSGeometry);
586	if (RT_FAILURE(rc))
587	{
588	/* Try if PCHS geometry works, otherwise fall back. */
589	rc = pHardDisk->pfnBiosGetPCHSGeometry(pHardDisk, &LCHSGeometry);
590	}
591	if ( RT_FAILURE(rc)
592	\|\| LCHSGeometry.cCylinders == 0
593	\|\| LCHSGeometry.cCylinders > 1024
594	\|\| LCHSGeometry.cHeads == 0
595	\|\| LCHSGeometry.cHeads > 16
596	\|\| LCHSGeometry.cSectors == 0
597	\|\| LCHSGeometry.cSectors > 63)
598	{
599	uint64_t cSectors = pHardDisk->pfnGetSize(pHardDisk) / 512;
600	if (cSectors / 16 / 63 <= 1024)
601	{
602	LCHSGeometry.cCylinders = RT_MAX(cSectors / 16 / 63, 1);
603	LCHSGeometry.cHeads = 16;
604	}
605	else if (cSectors / 32 / 63 <= 1024)
606	{
607	LCHSGeometry.cCylinders = RT_MAX(cSectors / 32 / 63, 1);
608	LCHSGeometry.cHeads = 32;
609	}
610	else if (cSectors / 64 / 63 <= 1024)
611	{
612	LCHSGeometry.cCylinders = cSectors / 64 / 63;
613	LCHSGeometry.cHeads = 64;
614	}
615	else if (cSectors / 128 / 63 <= 1024)
616	{
617	LCHSGeometry.cCylinders = cSectors / 128 / 63;
618	LCHSGeometry.cHeads = 128;
619	}
620	else
621	{
622	LCHSGeometry.cCylinders = RT_MIN(cSectors / 255 / 63, 1024);
623	LCHSGeometry.cHeads = 255;
624	}
625	LCHSGeometry.cSectors = 63;
626
627	}
628	rc = pHardDisk->pfnBiosSetLCHSGeometry(pHardDisk, &LCHSGeometry);
629	if (rc == VERR_VD_IMAGE_READ_ONLY)
630	{
631	LogRel(("PcBios: ATA failed to update LCHS geometry, read only\n"));
632	rc = VINF_SUCCESS;
633	}
634	else if (rc == VERR_PDM_GEOMETRY_NOT_SET)
635	{
636	LogRel(("PcBios: ATA failed to update LCHS geometry, backend refused\n"));
637	rc = VINF_SUCCESS;
638	}
639	}
640
641	*pLCHSGeometry = LCHSGeometry;
642
643	return rc;
644	}
645
646
647	/**
648	* Get logical CHS geometry for a hard disk, intended for SCSI/SAS drives
649	* with no physical geometry.
650	*
651	* @returns VBox status code.
652	* @param pHardDisk The hard disk.
653	* @param pLCHSGeometry Where to store the geometry settings.
654	*/
655	static int getLogicalDiskGeometry(PPDMIMEDIA pHardDisk, PPDMMEDIAGEOMETRY pLCHSGeometry)
656	{
657	PDMMEDIAGEOMETRY LCHSGeometry;
658	int rc = VINF_SUCCESS;
659
660	rc = pHardDisk->pfnBiosGetLCHSGeometry(pHardDisk, &LCHSGeometry);
661	if ( rc == VERR_PDM_GEOMETRY_NOT_SET
662	\|\| LCHSGeometry.cCylinders == 0
663	\|\| LCHSGeometry.cHeads == 0
664	\|\| LCHSGeometry.cHeads > 255
665	\|\| LCHSGeometry.cSectors == 0
666	\|\| LCHSGeometry.cSectors > 63)
667	{
668	/* Unlike the ATA case, if the image does not provide valid logical
669	* geometry, we leave things alone and let the BIOS decide what the
670	* logical geometry should be.
671	*/
672	rc = VERR_PDM_GEOMETRY_NOT_SET;
673	}
674	else
675	*pLCHSGeometry = LCHSGeometry;
676
677	return rc;
678	}
679
680
681	/**
682	* Get BIOS boot code from enmBootDevice in order
683	*
684	* @todo r=bird: This is a rather silly function since the conversion is 1:1.
685	*/
686	static uint8_t getBiosBootCode(PDEVPCBIOS pThis, unsigned iOrder)
687	{
688	switch (pThis->aenmBootDevice[iOrder])
689	{
690	case DEVPCBIOSBOOT_NONE:
691	return 0;
692	case DEVPCBIOSBOOT_FLOPPY:
693	return 1;
694	case DEVPCBIOSBOOT_HD:
695	return 2;
696	case DEVPCBIOSBOOT_DVD:
697	return 3;
698	case DEVPCBIOSBOOT_LAN:
699	return 4;
700	default:
701	AssertMsgFailed(("aenmBootDevice[%d]=%d\n", iOrder, pThis->aenmBootDevice[iOrder]));
702	return 0;
703	}
704	}
705
706
707	/**
708	* @interface_method_impl{PDMDEVREG,pfnInitComplete}
709	*
710	* This routine will write information needed by the bios to the CMOS.
711	*
712	* @see http://www.brl.ntt.co.jp/people/takehiko/interrupt/CMOS.LST.txt for
713	* a description of standard and non-standard CMOS registers.
714	*/
715	static DECLCALLBACK(int) pcbiosInitComplete(PPDMDEVINS pDevIns)
716	{
717	PDEVPCBIOS pThis = PDMINS_2_DATA(pDevIns, PDEVPCBIOS);
718	uint32_t u32;
719	unsigned i;
720	PUVM pUVM = PDMDevHlpGetUVM(pDevIns); AssertRelease(pUVM);
721	PPDMIMEDIA apHDs[4] = {0};
722	LogFlow(("pcbiosInitComplete:\n"));
723
724	PVM pVM = PDMDevHlpGetVM(pDevIns);
725	uint64_t const cbRamSize = MMR3PhysGetRamSize(pVM);
726	uint32_t const cbBelow4GB = MMR3PhysGetRamSizeBelow4GB(pVM);
727	uint64_t const cbAbove4GB = MMR3PhysGetRamSizeAbove4GB(pVM);
728
729	/*
730	* Memory sizes.
731	*/
732	/* base memory. */
733	u32 = cbRamSize > 640 ? 640 : (uint32_t)cbRamSize / _1K; /* <-- this test is wrong, but it doesn't matter since we never assign less than 1MB */
734	pcbiosCmosWrite(pDevIns, 0x15, RT_BYTE1(u32)); /* 15h - Base Memory in K, Low Byte */
735	pcbiosCmosWrite(pDevIns, 0x16, RT_BYTE2(u32)); /* 16h - Base Memory in K, High Byte */
736
737	/* Extended memory, up to 65MB */
738	u32 = cbRamSize >= 65 * _1M ? 0xffff : ((uint32_t)cbRamSize - _1M) / _1K;
739	pcbiosCmosWrite(pDevIns, 0x17, RT_BYTE1(u32)); /* 17h - Extended Memory in K, Low Byte */
740	pcbiosCmosWrite(pDevIns, 0x18, RT_BYTE2(u32)); /* 18h - Extended Memory in K, High Byte */
741	pcbiosCmosWrite(pDevIns, 0x30, RT_BYTE1(u32)); /* 30h - Extended Memory in K, Low Byte */
742	pcbiosCmosWrite(pDevIns, 0x31, RT_BYTE2(u32)); /* 31h - Extended Memory in K, High Byte */
743
744	/* Bochs BIOS specific? Anyway, it's the amount of memory above 16MB
745	and below 4GB (as it can only hold 4GB-16M). We have to chop off the
746	top 32MB or it conflict with what the ACPI tables return. (Should these
747	be adjusted, we still have to chop it at 0xfffc0000 or it'll conflict
748	with the high BIOS mapping.) */
749	if (cbRamSize > 16 * _1M)
750	u32 = (RT_MIN(cbBelow4GB, UINT32_C(0xfe000000)) - 16U * _1M) / _64K;
751	else
752	u32 = 0;
753	pcbiosCmosWrite(pDevIns, 0x34, RT_BYTE1(u32));
754	pcbiosCmosWrite(pDevIns, 0x35, RT_BYTE2(u32));
755
756	/* Bochs/VBox BIOS specific way of specifying memory above 4GB in 64KB units.
757	Bochs got these in a different location which we've already used for SATA,
758	it also lacks the last two. */
759	uint64_t c64KBAbove4GB = cbAbove4GB / _64K;
760	/* Make sure it doesn't hit the limits of the current BIOS code (RAM limit of ~255TB). */
761	AssertLogRelMsgReturn((c64KBAbove4GB >> (3 * 8)) < 255, ("%#RX64\n", c64KBAbove4GB), VERR_OUT_OF_RANGE);
762	pcbiosCmosWrite(pDevIns, 0x61, RT_BYTE1(c64KBAbove4GB));
763	pcbiosCmosWrite(pDevIns, 0x62, RT_BYTE2(c64KBAbove4GB));
764	pcbiosCmosWrite(pDevIns, 0x63, RT_BYTE3(c64KBAbove4GB));
765	pcbiosCmosWrite(pDevIns, 0x64, RT_BYTE4(c64KBAbove4GB));
766	pcbiosCmosWrite(pDevIns, 0x65, RT_BYTE5(c64KBAbove4GB));
767
768	/*
769	* Number of CPUs.
770	*/
771	pcbiosCmosWrite(pDevIns, 0x60, pThis->cCpus & 0xff);
772
773	/*
774	* APIC mode.
775	*/
776	pcbiosCmosWrite(pDevIns, 0x78, pThis->u8APICMode);
777
778	/*
779	* Bochs BIOS specifics - boot device.
780	* We do both new and old (ami-style) settings.
781	* See rombios.c line ~7215 (int19_function).
782	*/
783
784	uint8_t reg3d = getBiosBootCode(pThis, 0) \| (getBiosBootCode(pThis, 1) << 4);
785	uint8_t reg38 = /* pcbiosCmosRead(pDevIns, 0x38) \| */ getBiosBootCode(pThis, 2) << 4;
786	/* This is an extension. Bochs BIOS normally supports only 3 boot devices. */
787	uint8_t reg3c = getBiosBootCode(pThis, 3) \| (pThis->uBootDelay << 4);
788	pcbiosCmosWrite(pDevIns, 0x3d, reg3d);
789	pcbiosCmosWrite(pDevIns, 0x38, reg38);
790	pcbiosCmosWrite(pDevIns, 0x3c, reg3c);
791
792	/*
793	* PXE debug option.
794	*/
795	pcbiosCmosWrite(pDevIns, 0x3f, pThis->u8PXEDebug);
796
797	/*
798	* Network boot device list.
799	*/
800	for (i = 0; i < NET_BOOT_DEVS; ++i)
801	{
802	pcbiosCmosWrite(pDevIns, 0x82 + i * 2, RT_BYTE1(pThis->au16NetBootDev[i]));
803	pcbiosCmosWrite(pDevIns, 0x83 + i * 2, RT_BYTE2(pThis->au16NetBootDev[i]));
804	}
805
806	/*
807	* Floppy drive type.
808	*/
809	uint32_t cFDs = 0;
810	u32 = 0;
811	for (i = 0; i < 2; i++)
812	{
813	PPDMIBASE pBase;
814	int rc = PDMR3QueryLun(pUVM, pThis->pszFDDevice, 0, i, &pBase);
815	if (RT_SUCCESS(rc))
816	{
817	PPDMIMEDIA pFD = PDMIBASE_QUERY_INTERFACE(pBase, PDMIMEDIA);
818	if (pFD)
819	{
820	cFDs++;
821	unsigned cShift = i == 0 ? 4 : 0;
822	switch (pFD->pfnGetType(pFD))
823	{
824	case PDMMEDIATYPE_FLOPPY_360: u32 \|= 1 << cShift; break;
825	case PDMMEDIATYPE_FLOPPY_1_20: u32 \|= 2 << cShift; break;
826	case PDMMEDIATYPE_FLOPPY_720: u32 \|= 3 << cShift; break;
827	case PDMMEDIATYPE_FLOPPY_1_44: u32 \|= 4 << cShift; break;
828	case PDMMEDIATYPE_FLOPPY_2_88: u32 \|= 5 << cShift; break;
829	case PDMMEDIATYPE_FLOPPY_FAKE_15_6: u32 \|= 14 << cShift; break;
830	case PDMMEDIATYPE_FLOPPY_FAKE_63_5: u32 \|= 15 << cShift; break;
831	default: AssertFailed(); break;
832	}
833	}
834	}
835	}
836	pcbiosCmosWrite(pDevIns, 0x10, u32); /* 10h - Floppy Drive Type */
837
838	/*
839	* Equipment byte.
840	*/
841	if (cFDs > 0)
842	u32 = ((cFDs - 1) << 6) \| 0x01; /* floppy installed, additional drives. */
843	else
844	u32 = 0x00; /* floppy not installed. */
845	u32 \|= RT_BIT(1); /* math coprocessor installed */
846	u32 \|= RT_BIT(2); /* keyboard enabled (or mouse?) */
847	u32 \|= RT_BIT(3); /* display enabled (monitory type is 0, i.e. vga) */
848	pcbiosCmosWrite(pDevIns, 0x14, u32); /* 14h - Equipment Byte */
849
850	/*
851	* IDE harddisks.
852	*/
853	for (i = 0; i < RT_ELEMENTS(apHDs); i++)
854	{
855	PPDMIBASE pBase;
856	int rc = PDMR3QueryLun(pUVM, pThis->pszHDDevice, 0, i, &pBase);
857	if (RT_SUCCESS(rc))
858	apHDs[i] = PDMIBASE_QUERY_INTERFACE(pBase, PDMIMEDIA);
859	if ( apHDs[i]
860	&& ( apHDs[i]->pfnGetType(apHDs[i]) != PDMMEDIATYPE_HARD_DISK
861	\|\| !apHDs[i]->pfnBiosIsVisible(apHDs[i])))
862	apHDs[i] = NULL;
863	if (apHDs[i])
864	{
865	PDMMEDIAGEOMETRY LCHSGeometry;
866	int rc2 = setLogicalDiskGeometry(pBase, apHDs[i], &LCHSGeometry);
867	AssertRC(rc2);
868
869	if (i < 4)
870	{
871	/* Award BIOS extended drive types for first to fourth disk.
872	* Used by the BIOS for setting the logical geometry. */
873	int offType, offInfo;
874	switch (i)
875	{
876	case 0:
877	offType = 0x19;
878	offInfo = 0x1e;
879	break;
880	case 1:
881	offType = 0x1a;
882	offInfo = 0x26;
883	break;
884	case 2:
885	offType = 0x00;
886	offInfo = 0x67;
887	break;
888	case 3:
889	default:
890	offType = 0x00;
891	offInfo = 0x70;
892	break;
893	}
894	pcbiosCmosInitHardDisk(pDevIns, offType, offInfo,
895	&LCHSGeometry);
896	}
897	LogRel(("PcBios: ATA LUN#%d LCHS=%u/%u/%u\n", i, LCHSGeometry.cCylinders, LCHSGeometry.cHeads, LCHSGeometry.cSectors));
898	}
899	}
900
901	/* 0Fh means extended and points to 19h, 1Ah */
902	u32 = (apHDs[0] ? 0xf0 : 0) \| (apHDs[1] ? 0x0f : 0);
903	pcbiosCmosWrite(pDevIns, 0x12, u32);
904
905	/*
906	* SATA harddisks.
907	*/
908	if (pThis->pszSataDevice)
909	{
910	/* Clear pointers to the block devices. */
911	for (i = 0; i < RT_ELEMENTS(apHDs); i++)
912	apHDs[i] = NULL;
913
914	for (i = 0; i < RT_ELEMENTS(apHDs); i++)
915	{
916	PPDMIBASE pBase;
917	int rc = PDMR3QueryLun(pUVM, pThis->pszSataDevice, 0, pThis->iSataHDLUN[i], &pBase);
918	if (RT_SUCCESS(rc))
919	apHDs[i] = PDMIBASE_QUERY_INTERFACE(pBase, PDMIMEDIA);
920	if ( apHDs[i]
921	&& ( apHDs[i]->pfnGetType(apHDs[i]) != PDMMEDIATYPE_HARD_DISK
922	\|\| !apHDs[i]->pfnBiosIsVisible(apHDs[i])))
923	apHDs[i] = NULL;
924	if (apHDs[i])
925	{
926	PDMMEDIAGEOMETRY LCHSGeometry;
927	rc = setLogicalDiskGeometry(pBase, apHDs[i], &LCHSGeometry);
928	AssertRC(rc);
929
930	if (i < 4)
931	{
932	/* Award BIOS extended drive types for first to fourth disk.
933	* Used by the BIOS for setting the logical geometry. */
934	int offInfo;
935	switch (i)
936	{
937	case 0:
938	offInfo = 0x40;
939	break;
940	case 1:
941	offInfo = 0x48;
942	break;
943	case 2:
944	offInfo = 0x50;
945	break;
946	case 3:
947	default:
948	offInfo = 0x58;
949	break;
950	}
951	pcbiosCmosInitHardDisk(pDevIns, 0x00, offInfo,
952	&LCHSGeometry);
953	}
954	LogRel(("PcBios: SATA LUN#%d LCHS=%u/%u/%u\n", i, LCHSGeometry.cCylinders, LCHSGeometry.cHeads, LCHSGeometry.cSectors));
955	}
956	}
957	}
958
959	/*
960	* SCSI harddisks. Not handled quite the same as SATA.
961	*/
962	if (pThis->pszScsiDevice)
963	{
964	/* Clear pointers to the block devices. */
965	for (i = 0; i < RT_ELEMENTS(apHDs); i++)
966	apHDs[i] = NULL;
967
968	for (i = 0; i < RT_ELEMENTS(apHDs); i++)
969	{
970	PPDMIBASE pBase;
971	int rc = PDMR3QueryLun(pUVM, pThis->pszScsiDevice, 0, pThis->iScsiHDLUN[i], &pBase);
972	if (RT_SUCCESS(rc))
973	apHDs[i] = PDMIBASE_QUERY_INTERFACE(pBase, PDMIMEDIA);
974	if ( apHDs[i]
975	&& ( apHDs[i]->pfnGetType(apHDs[i]) != PDMMEDIATYPE_HARD_DISK
976	\|\| !apHDs[i]->pfnBiosIsVisible(apHDs[i])))
977	apHDs[i] = NULL;
978	if (apHDs[i])
979	{
980	PDMMEDIAGEOMETRY LCHSGeometry;
981	rc = getLogicalDiskGeometry(apHDs[i], &LCHSGeometry);
982
983	if (i < 4 && RT_SUCCESS(rc))
984	{
985	/* Extended drive information (for SCSI disks).
986	* Used by the BIOS for setting the logical geometry, but
987	* only if the image provided valid data.
988	*/
989	int offInfo;
990	switch (i)
991	{
992	case 0:
993	offInfo = 0x90;
994	break;
995	case 1:
996	offInfo = 0x98;
997	break;
998	case 2:
999	offInfo = 0xa0;
1000	break;
1001	case 3:
1002	default:
1003	offInfo = 0xa8;
1004	break;
1005	}
1006	pcbiosCmosInitHardDisk(pDevIns, 0x00, offInfo, &LCHSGeometry);
1007	LogRel(("PcBios: SCSI LUN#%d LCHS=%u/%u/%u\n", i, LCHSGeometry.cCylinders, LCHSGeometry.cHeads, LCHSGeometry.cSectors));
1008	}
1009	else
1010	LogRel(("PcBios: SCSI LUN#%d LCHS not provided\n", i));
1011	}
1012	}
1013	}
1014
1015	/* Calculate and store AT-style CMOS checksum. */
1016	uint16_t cksum = 0;
1017	for (i = 0x10; i < 0x2e; ++i)
1018	cksum += pcbiosCmosRead(pDevIns, i);
1019	pcbiosCmosWrite(pDevIns, 0x2e, RT_BYTE1(cksum));
1020	pcbiosCmosWrite(pDevIns, 0x2f, RT_BYTE2(cksum));
1021
1022	LogFlow(("%s: returns VINF_SUCCESS\n", __FUNCTION__));
1023	return VINF_SUCCESS;
1024	}
1025
1026
1027	/**
1028	* @interface_method_impl{PDMDEVREG,pfnMemSetup}
1029	*/
1030	static DECLCALLBACK(void) pcbiosMemSetup(PPDMDEVINS pDevIns, PDMDEVMEMSETUPCTX enmCtx)
1031	{
1032	RT_NOREF1(enmCtx);
1033	PDEVPCBIOS pThis = PDMINS_2_DATA(pDevIns, PDEVPCBIOS);
1034	LogFlow(("pcbiosMemSetup:\n"));
1035
1036	if (pThis->u8IOAPIC)
1037	FwCommonPlantMpsFloatPtr(pDevIns);
1038
1039	/*
1040	* Re-shadow the LAN ROM image and make it RAM/RAM.
1041	*
1042	* This is normally done by the BIOS code, but since we're currently lacking
1043	* the chipset support for this we do it here (and in the constructor).
1044	*/
1045	uint32_t cPages = RT_ALIGN_64(pThis->cbLanBoot, PAGE_SIZE) >> PAGE_SHIFT;
1046	RTGCPHYS GCPhys = VBOX_LANBOOT_SEG << 4;
1047	while (cPages > 0)
1048	{
1049	uint8_t abPage[PAGE_SIZE];
1050	int rc;
1051
1052	/* Read the (original) ROM page and write it back to the RAM page. */
1053	rc = PDMDevHlpROMProtectShadow(pDevIns, GCPhys, PAGE_SIZE, PGMROMPROT_READ_ROM_WRITE_RAM);
1054	AssertLogRelRC(rc);
1055
1056	rc = PDMDevHlpPhysRead(pDevIns, GCPhys, abPage, PAGE_SIZE);
1057	AssertLogRelRC(rc);
1058	if (RT_FAILURE(rc))
1059	memset(abPage, 0xcc, sizeof(abPage));
1060
1061	rc = PDMDevHlpPhysWrite(pDevIns, GCPhys, abPage, PAGE_SIZE);
1062	AssertLogRelRC(rc);
1063
1064	/* Switch to the RAM/RAM mode. */
1065	rc = PDMDevHlpROMProtectShadow(pDevIns, GCPhys, PAGE_SIZE, PGMROMPROT_READ_RAM_WRITE_RAM);
1066	AssertLogRelRC(rc);
1067
1068	/* Advance */
1069	GCPhys += PAGE_SIZE;
1070	cPages--;
1071	}
1072	}
1073
1074
1075	/**
1076	* @interface_method_impl{PDMDEVREG,pfnDestruct}
1077	*/
1078	static DECLCALLBACK(int) pcbiosDestruct(PPDMDEVINS pDevIns)
1079	{
1080	PDEVPCBIOS pThis = PDMINS_2_DATA(pDevIns, PDEVPCBIOS);
1081	LogFlow(("pcbiosDestruct:\n"));
1082	PDMDEV_CHECK_VERSIONS_RETURN_QUIET(pDevIns);
1083
1084	/*
1085	* Free MM heap pointers.
1086	*/
1087	if (pThis->pu8PcBios)
1088	{
1089	PDMDevHlpMMHeapFree(pDevIns, pThis->pu8PcBios);
1090	pThis->pu8PcBios = NULL;
1091	}
1092
1093	if (pThis->pszPcBiosFile)
1094	{
1095	PDMDevHlpMMHeapFree(pDevIns, pThis->pszPcBiosFile);
1096	pThis->pszPcBiosFile = NULL;
1097	}
1098
1099	if (pThis->pu8LanBoot)
1100	{
1101	PDMDevHlpMMHeapFree(pDevIns, pThis->pu8LanBoot);
1102	pThis->pu8LanBoot = NULL;
1103	}
1104
1105	if (pThis->pszLanBootFile)
1106	{
1107	PDMDevHlpMMHeapFree(pDevIns, pThis->pszLanBootFile);
1108	pThis->pszLanBootFile = NULL;
1109	}
1110
1111	if (pThis->pszHDDevice)
1112	{
1113	PDMDevHlpMMHeapFree(pDevIns, pThis->pszHDDevice);
1114	pThis->pszHDDevice = NULL;
1115	}
1116
1117	if (pThis->pszFDDevice)
1118	{
1119	PDMDevHlpMMHeapFree(pDevIns, pThis->pszFDDevice);
1120	pThis->pszFDDevice = NULL;
1121	}
1122
1123	if (pThis->pszSataDevice)
1124	{
1125	PDMDevHlpMMHeapFree(pDevIns, pThis->pszSataDevice);
1126	pThis->pszSataDevice = NULL;
1127	}
1128
1129	if (pThis->pszScsiDevice)
1130	{
1131	PDMDevHlpMMHeapFree(pDevIns, pThis->pszScsiDevice);
1132	pThis->pszScsiDevice = NULL;
1133	}
1134
1135	return VINF_SUCCESS;
1136	}
1137
1138
1139	/**
1140	* Convert config value to DEVPCBIOSBOOT.
1141	*
1142	* @returns VBox status code.
1143	* @param pDevIns Device instance data.
1144	* @param pCfg Configuration handle.
1145	* @param pszParam The name of the value to read.
1146	* @param penmBoot Where to store the boot method.
1147	*/
1148	static int pcbiosBootFromCfg(PPDMDEVINS pDevIns, PCFGMNODE pCfg, const char pszParam, DEVPCBIOSBOOT penmBoot)
1149	{
1150	char *psz;
1151	int rc = CFGMR3QueryStringAlloc(pCfg, pszParam, &psz);
1152	if (RT_FAILURE(rc))
1153	return PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
1154	N_("Configuration error: Querying \"%s\" as a string failed"),
1155	pszParam);
1156	if (!strcmp(psz, "DVD") \|\| !strcmp(psz, "CDROM"))
1157	*penmBoot = DEVPCBIOSBOOT_DVD;
1158	else if (!strcmp(psz, "IDE"))
1159	*penmBoot = DEVPCBIOSBOOT_HD;
1160	else if (!strcmp(psz, "FLOPPY"))
1161	*penmBoot = DEVPCBIOSBOOT_FLOPPY;
1162	else if (!strcmp(psz, "LAN"))
1163	*penmBoot = DEVPCBIOSBOOT_LAN;
1164	else if (!strcmp(psz, "NONE"))
1165	*penmBoot = DEVPCBIOSBOOT_NONE;
1166	else
1167	{
1168	PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
1169	N_("Configuration error: The \"%s\" value \"%s\" is unknown"),
1170	pszParam, psz);
1171	rc = VERR_INTERNAL_ERROR;
1172	}
1173	MMR3HeapFree(psz);
1174	return rc;
1175	}
1176
1177	/**
1178	* @interface_method_impl{PDMDEVREG,pfnConstruct}
1179	*/
1180	static DECLCALLBACK(int) pcbiosConstruct(PPDMDEVINS pDevIns, int iInstance, PCFGMNODE pCfg)
1181	{
1182	RT_NOREF1(iInstance);
1183	PDEVPCBIOS pThis = PDMINS_2_DATA(pDevIns, PDEVPCBIOS);
1184	int rc;
1185	int cb;
1186
1187	Assert(iInstance == 0);
1188	PDMDEV_CHECK_VERSIONS_RETURN(pDevIns);
1189
1190	/*
1191	* Validate configuration.
1192	*/
1193	if (!CFGMR3AreValuesValid(pCfg,
1194	"BootDevice0\0"
1195	"BootDevice1\0"
1196	"BootDevice2\0"
1197	"BootDevice3\0"
1198	"HardDiskDevice\0"
1199	"SataHardDiskDevice\0"
1200	"SataLUN1\0"
1201	"SataLUN2\0"
1202	"SataLUN3\0"
1203	"SataLUN4\0"
1204	"ScsiHardDiskDevice\0"
1205	"ScsiLUN1\0"
1206	"ScsiLUN2\0"
1207	"ScsiLUN3\0"
1208	"ScsiLUN4\0"
1209	"FloppyDevice\0"
1210	"DelayBoot\0"
1211	"BiosRom\0"
1212	"LanBootRom\0"
1213	"PXEDebug\0"
1214	"UUID\0"
1215	"IOAPIC\0"
1216	"APIC\0"
1217	"NumCPUs\0"
1218	"McfgBase\0"
1219	"McfgLength\0"
1220	"DmiBIOSFirmwareMajor\0"
1221	"DmiBIOSFirmwareMinor\0"
1222	"DmiBIOSReleaseDate\0"
1223	"DmiBIOSReleaseMajor\0"
1224	"DmiBIOSReleaseMinor\0"
1225	"DmiBIOSVendor\0"
1226	"DmiBIOSVersion\0"
1227	"DmiSystemFamily\0"
1228	"DmiSystemProduct\0"
1229	"DmiSystemSerial\0"
1230	"DmiSystemSKU\0"
1231	"DmiSystemUuid\0"
1232	"DmiSystemVendor\0"
1233	"DmiSystemVersion\0"
1234	"DmiBoardAssetTag\0"
1235	"DmiBoardBoardType\0"
1236	"DmiBoardLocInChass\0"
1237	"DmiBoardProduct\0"
1238	"DmiBoardSerial\0"
1239	"DmiBoardVendor\0"
1240	"DmiBoardVersion\0"
1241	"DmiChassisAssetTag\0"
1242	"DmiChassisSerial\0"
1243	"DmiChassisType\0"
1244	"DmiChassisVendor\0"
1245	"DmiChassisVersion\0"
1246	"DmiProcManufacturer\0"
1247	"DmiProcVersion\0"
1248	"DmiOEMVBoxVer\0"
1249	"DmiOEMVBoxRev\0"
1250	"DmiUseHostInfo\0"
1251	"DmiExposeMemoryTable\0"
1252	"DmiExposeProcInf\0"
1253	"CheckShutdownStatusForSoftReset\0"
1254	"ClearShutdownStatusOnHardReset\0"
1255	))
1256	return PDMDEV_SET_ERROR(pDevIns, VERR_PDM_DEVINS_UNKNOWN_CFG_VALUES,
1257	N_("Invalid configuration for device pcbios device"));
1258
1259	/*
1260	* Init the data.
1261	*/
1262	rc = CFGMR3QueryU16Def(pCfg, "NumCPUs", &pThis->cCpus, 1);
1263	if (RT_FAILURE(rc))
1264	return PDMDEV_SET_ERROR(pDevIns, rc,
1265	N_("Configuration error: Querying \"NumCPUs\" as integer failed"));
1266
1267	rc = CFGMR3QueryU64Def(pCfg, "McfgBase", &pThis->u64McfgBase, 0);
1268	if (RT_FAILURE(rc))
1269	return PDMDEV_SET_ERROR(pDevIns, rc,
1270	N_("Configuration error: Querying \"\" as integer failed"));
1271	rc = CFGMR3QueryU64Def(pCfg, "McfgLength", &pThis->cbMcfgLength, 0);
1272	if (RT_FAILURE(rc))
1273	return PDMDEV_SET_ERROR(pDevIns, rc,
1274	N_("Configuration error: Querying \"McfgLength\" as integer failed"));
1275
1276
1277	LogRel(("PcBios: [SMP] BIOS with %u CPUs\n", pThis->cCpus));
1278
1279	rc = CFGMR3QueryU8Def(pCfg, "IOAPIC", &pThis->u8IOAPIC, 1);
1280	if (RT_FAILURE (rc))
1281	return PDMDEV_SET_ERROR(pDevIns, rc,
1282	N_("Configuration error: Failed to read \"IOAPIC\""));
1283
1284	rc = CFGMR3QueryU8Def(pCfg, "APIC", &pThis->u8APICMode, 1);
1285	if (RT_FAILURE (rc))
1286	return PDMDEV_SET_ERROR(pDevIns, rc,
1287	N_("Configuration error: Failed to read \"APIC\""));
1288
1289	static const char * const s_apszBootDevices[] = { "BootDevice0", "BootDevice1", "BootDevice2", "BootDevice3" };
1290	Assert(RT_ELEMENTS(s_apszBootDevices) == RT_ELEMENTS(pThis->aenmBootDevice));
1291	for (unsigned i = 0; i < RT_ELEMENTS(pThis->aenmBootDevice); i++)
1292	{
1293	rc = pcbiosBootFromCfg(pDevIns, pCfg, s_apszBootDevices[i], &pThis->aenmBootDevice[i]);
1294	if (RT_FAILURE(rc))
1295	return rc;
1296	}
1297
1298	rc = CFGMR3QueryStringAlloc(pCfg, "HardDiskDevice", &pThis->pszHDDevice);
1299	if (RT_FAILURE(rc))
1300	return PDMDEV_SET_ERROR(pDevIns, rc,
1301	N_("Configuration error: Querying \"HardDiskDevice\" as a string failed"));
1302
1303	rc = CFGMR3QueryStringAlloc(pCfg, "FloppyDevice", &pThis->pszFDDevice);
1304	if (RT_FAILURE(rc))
1305	return PDMDEV_SET_ERROR(pDevIns, rc,
1306	N_("Configuration error: Querying \"FloppyDevice\" as a string failed"));
1307
1308	rc = CFGMR3QueryStringAlloc(pCfg, "SataHardDiskDevice", &pThis->pszSataDevice);
1309	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
1310	pThis->pszSataDevice = NULL;
1311	else if (RT_FAILURE(rc))
1312	return PDMDEV_SET_ERROR(pDevIns, rc,
1313	N_("Configuration error: Querying \"SataHardDiskDevice\" as a string failed"));
1314
1315	if (pThis->pszSataDevice)
1316	{
1317	static const char * const s_apszSataDisks[] =
1318	{ "SataLUN1", "SataLUN2", "SataLUN3", "SataLUN4" };
1319	Assert(RT_ELEMENTS(s_apszSataDisks) == RT_ELEMENTS(pThis->iSataHDLUN));
1320	for (unsigned i = 0; i < RT_ELEMENTS(pThis->iSataHDLUN); i++)
1321	{
1322	rc = CFGMR3QueryU32(pCfg, s_apszSataDisks[i], &pThis->iSataHDLUN[i]);
1323	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
1324	pThis->iSataHDLUN[i] = i;
1325	else if (RT_FAILURE(rc))
1326	return PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
1327	N_("Configuration error: Querying \"%s\" as a string failed"), s_apszSataDisks);
1328	}
1329	}
1330
1331	/* Repeat the exercise for SCSI drives. */
1332	rc = CFGMR3QueryStringAlloc(pCfg, "ScsiHardDiskDevice", &pThis->pszScsiDevice);
1333	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
1334	pThis->pszScsiDevice = NULL;
1335	else if (RT_FAILURE(rc))
1336	return PDMDEV_SET_ERROR(pDevIns, rc,
1337	N_("Configuration error: Querying \"ScsiHardDiskDevice\" as a string failed"));
1338
1339	if (pThis->pszScsiDevice)
1340	{
1341	static const char * const s_apszScsiDisks[] =
1342	{ "ScsiLUN1", "ScsiLUN2", "ScsiLUN3", "ScsiLUN4" };
1343	Assert(RT_ELEMENTS(s_apszScsiDisks) == RT_ELEMENTS(pThis->iScsiHDLUN));
1344	for (unsigned i = 0; i < RT_ELEMENTS(pThis->iScsiHDLUN); i++)
1345	{
1346	rc = CFGMR3QueryU32(pCfg, s_apszScsiDisks[i], &pThis->iScsiHDLUN[i]);
1347	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
1348	pThis->iScsiHDLUN[i] = i;
1349	else if (RT_FAILURE(rc))
1350	return PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
1351	N_("Configuration error: Querying \"%s\" as a string failed"), s_apszScsiDisks);
1352	}
1353	}
1354
1355
1356	/*
1357	* Register I/O Ports and PC BIOS.
1358	*/
1359	rc = PDMDevHlpIOPortRegister(pDevIns, 0x400, 4, NULL, pcbiosIOPortWrite, pcbiosIOPortRead,
1360	NULL, NULL, "Bochs PC BIOS - Panic & Debug");
1361	if (RT_FAILURE(rc))
1362	return rc;
1363	rc = pcbiosRegisterShutdown(pDevIns, pThis, true /* fNewShutdownPort */);
1364	if (RT_FAILURE(rc))
1365	return rc;
1366
1367	/*
1368	* Register SSM handlers, for remembering which shutdown port to use.
1369	*/
1370	rc = PDMDevHlpSSMRegisterEx(pDevIns, PCBIOS_SSM_VERSION, 1 /* cbGuess */, NULL,
1371	NULL, NULL, NULL,
1372	NULL, pcbiosSaveExec, NULL,
1373	pcbiosLoadPrep, pcbiosLoadExec, pcbiosLoadDone);
1374
1375	/*
1376	* Read the PXE debug logging option.
1377	*/
1378	rc = CFGMR3QueryU8Def(pCfg, "PXEDebug", &pThis->u8PXEDebug, false);
1379	if (RT_FAILURE(rc))
1380	return PDMDEV_SET_ERROR(pDevIns, rc,
1381	N_("Configuration error: Querying \"PXEDebug\" as integer failed"));
1382
1383	/* Clear the net boot device list. All bits set invokes old behavior,
1384	* as if no second CMOS bank was present.
1385	*/
1386	memset(&pThis->au16NetBootDev, 0xff, sizeof(pThis->au16NetBootDev));
1387
1388	/*
1389	* Determine the network boot order.
1390	*/
1391	PCFGMNODE pCfgNetBoot = CFGMR3GetChild(pCfg, "NetBoot");
1392	if (pCfgNetBoot == NULL)
1393	{
1394	/* Do nothing. */
1395	rc = VINF_SUCCESS;
1396	}
1397	else
1398	{
1399	PCFGMNODE pCfgNetBootDevice;
1400	uint8_t u8PciBus;
1401	uint8_t u8PciDev;
1402	uint8_t u8PciFn;
1403	uint16_t u16BusDevFn;
1404	char szIndex[] = "?";
1405
1406	Assert(pCfgNetBoot);
1407	for (unsigned i = 0; i < NET_BOOT_DEVS; ++i)
1408	{
1409	szIndex[0] = '0' + i;
1410	pCfgNetBootDevice = CFGMR3GetChild(pCfgNetBoot, szIndex);
1411
1412	rc = CFGMR3QueryU8(pCfgNetBootDevice, "PCIBusNo", &u8PciBus);
1413	if (rc == VERR_CFGM_VALUE_NOT_FOUND \|\| rc == VERR_CFGM_NO_PARENT)
1414	{
1415	/* Do nothing and stop iterating. */
1416	rc = VINF_SUCCESS;
1417	break;
1418	}
1419	else if (RT_FAILURE(rc))
1420	return PDMDEV_SET_ERROR(pDevIns, rc,
1421	N_("Configuration error: Querying \"Netboot/x/PCIBusNo\" as integer failed"));
1422	rc = CFGMR3QueryU8(pCfgNetBootDevice, "PCIDeviceNo", &u8PciDev);
1423	if (rc == VERR_CFGM_VALUE_NOT_FOUND \|\| rc == VERR_CFGM_NO_PARENT)
1424	{
1425	/* Do nothing and stop iterating. */
1426	rc = VINF_SUCCESS;
1427	break;
1428	}
1429	else if (RT_FAILURE(rc))
1430	return PDMDEV_SET_ERROR(pDevIns, rc,
1431	N_("Configuration error: Querying \"Netboot/x/PCIDeviceNo\" as integer failed"));
1432	rc = CFGMR3QueryU8(pCfgNetBootDevice, "PCIFunctionNo", &u8PciFn);
1433	if (rc == VERR_CFGM_VALUE_NOT_FOUND \|\| rc == VERR_CFGM_NO_PARENT)
1434	{
1435	/* Do nothing and stop iterating. */
1436	rc = VINF_SUCCESS;
1437	break;
1438	}
1439	else if (RT_FAILURE(rc))
1440	return PDMDEV_SET_ERROR(pDevIns, rc,
1441	N_("Configuration error: Querying \"Netboot/x/PCIFunctionNo\" as integer failed"));
1442	u16BusDevFn = (((uint16_t)u8PciBus) << 8) \| ((u8PciDev & 0x1F) << 3) \| (u8PciFn & 0x7);
1443	pThis->au16NetBootDev[i] = u16BusDevFn;
1444	}
1445	}
1446
1447	/*
1448	* Get the system BIOS ROM file name.
1449	*/
1450	rc = CFGMR3QueryStringAlloc(pCfg, "BiosRom", &pThis->pszPcBiosFile);
1451	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
1452	{
1453	pThis->pszPcBiosFile = NULL;
1454	rc = VINF_SUCCESS;
1455	}
1456	else if (RT_FAILURE(rc))
1457	return PDMDEV_SET_ERROR(pDevIns, rc,
1458	N_("Configuration error: Querying \"BiosRom\" as a string failed"));
1459	else if (!*pThis->pszPcBiosFile)
1460	{
1461	MMR3HeapFree(pThis->pszPcBiosFile);
1462	pThis->pszPcBiosFile = NULL;
1463	}
1464
1465	/*
1466	* Get the CPU arch so we can load the appropriate ROMs.
1467	*/
1468	PVM pVM = PDMDevHlpGetVM(pDevIns);
1469	CPUMMICROARCH const enmMicroarch = pVM ? pVM->cpum.ro.GuestFeatures.enmMicroarch : kCpumMicroarch_Intel_P6;
1470
1471	if (pThis->pszPcBiosFile)
1472	{
1473	/*
1474	* Load the BIOS ROM.
1475	*/
1476	RTFILE hFilePcBios;
1477	rc = RTFileOpen(&hFilePcBios, pThis->pszPcBiosFile,
1478	RTFILE_O_READ \| RTFILE_O_OPEN \| RTFILE_O_DENY_WRITE);
1479	if (RT_SUCCESS(rc))
1480	{
1481	/* Figure the size and check restrictions. */
1482	uint64_t cbPcBios;
1483	rc = RTFileGetSize(hFilePcBios, &cbPcBios);
1484	if (RT_SUCCESS(rc))
1485	{
1486	pThis->cbPcBios = (uint32_t)cbPcBios;
1487	if ( RT_ALIGN(pThis->cbPcBios, _64K) == pThis->cbPcBios
1488	&& pThis->cbPcBios == cbPcBios
1489	&& pThis->cbPcBios <= 32 * _64K
1490	&& pThis->cbPcBios >= _64K)
1491	{
1492	pThis->pu8PcBios = (uint8_t *)PDMDevHlpMMHeapAlloc(pDevIns, pThis->cbPcBios);
1493	if (pThis->pu8PcBios)
1494	{
1495	rc = RTFileRead(hFilePcBios, pThis->pu8PcBios, pThis->cbPcBios, NULL);
1496	if (RT_FAILURE(rc))
1497	rc = PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
1498	N_("Error reading the BIOS image ('%s)"), pThis->pszPcBiosFile);
1499	}
1500	else
1501	rc = PDMDevHlpVMSetError(pDevIns, VERR_NO_MEMORY, RT_SRC_POS,
1502	N_("Failed to allocate %#x bytes for loading the BIOS image"),
1503	pThis->cbPcBios);
1504	}
1505	else
1506	rc = PDMDevHlpVMSetError(pDevIns, VERR_OUT_OF_RANGE, RT_SRC_POS,
1507	N_("Invalid system BIOS file size ('%s'): %#llx (%llu)"),
1508	pThis->pszPcBiosFile, cbPcBios, cbPcBios);
1509	}
1510	else
1511	rc = PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
1512	N_("Failed to query the system BIOS file size ('%s')"),
1513	pThis->pszPcBiosFile);
1514	RTFileClose(hFilePcBios);
1515	}
1516	else
1517	rc = PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
1518	N_("Failed to open system BIOS file '%s'"), pThis->pszPcBiosFile);
1519	if (RT_FAILURE(rc))
1520	return rc;
1521
1522	LogRel(("PcBios: Using BIOS ROM '%s' with a size of %#x bytes\n", pThis->pszPcBiosFile, pThis->cbPcBios));
1523	}
1524	else
1525	{
1526	/*
1527	* Use one of the embedded BIOS ROM images.
1528	*/
1529	uint8_t const *pbBios;
1530	uint32_t cbBios;
1531	if ( enmMicroarch == kCpumMicroarch_Intel_8086
1532	\|\| enmMicroarch == kCpumMicroarch_Intel_80186
1533	\|\| enmMicroarch == kCpumMicroarch_NEC_V20
1534	\|\| enmMicroarch == kCpumMicroarch_NEC_V30)
1535	{
1536	pbBios = g_abPcBiosBinary8086;
1537	cbBios = g_cbPcBiosBinary8086;
1538	LogRel(("PcBios: Using the 8086 BIOS image!\n"));
1539	}
1540	else if (enmMicroarch == kCpumMicroarch_Intel_80286)
1541	{
1542	pbBios = g_abPcBiosBinary286;
1543	cbBios = g_cbPcBiosBinary286;
1544	LogRel(("PcBios: Using the 286 BIOS image!\n"));
1545	}
1546	else
1547	{
1548	pbBios = g_abPcBiosBinary386;
1549	cbBios = g_cbPcBiosBinary386;
1550	LogRel(("PcBios: Using the 386+ BIOS image.\n"));
1551	}
1552	pThis->pu8PcBios = (uint8_t *)PDMDevHlpMMHeapAlloc(pDevIns, cbBios);
1553	if (pThis->pu8PcBios)
1554	{
1555	pThis->cbPcBios = cbBios;
1556	memcpy(pThis->pu8PcBios, pbBios, cbBios);
1557	}
1558	else
1559	return PDMDevHlpVMSetError(pDevIns, VERR_NO_MEMORY, RT_SRC_POS,
1560	N_("Failed to allocate %#x bytes for loading the embedded BIOS image"), cbBios);
1561	}
1562	const uint8_t *pu8PcBiosBinary = pThis->pu8PcBios;
1563	uint32_t cbPcBiosBinary = pThis->cbPcBios;
1564
1565	/*
1566	* Query the machine's UUID for SMBIOS/DMI use.
1567	*/
1568	RTUUID uuid;
1569	rc = CFGMR3QueryBytes(pCfg, "UUID", &uuid, sizeof(uuid));
1570	if (RT_FAILURE(rc))
1571	return PDMDEV_SET_ERROR(pDevIns, rc,
1572	N_("Configuration error: Querying \"UUID\" failed"));
1573
1574	/* Convert the UUID to network byte order. Not entirely straightforward as parts are MSB already... */
1575	uuid.Gen.u32TimeLow = RT_H2BE_U32(uuid.Gen.u32TimeLow);
1576	uuid.Gen.u16TimeMid = RT_H2BE_U16(uuid.Gen.u16TimeMid);
1577	uuid.Gen.u16TimeHiAndVersion = RT_H2BE_U16(uuid.Gen.u16TimeHiAndVersion);
1578	uint16_t cbDmiTables = 0;
1579	uint16_t cNumDmiTables = 0;
1580	rc = FwCommonPlantDMITable(pDevIns, pThis->au8DMIPage, VBOX_DMI_TABLE_SIZE,
1581	&uuid, pCfg, pThis->cCpus, &cbDmiTables, &cNumDmiTables);
1582	if (RT_FAILURE(rc))
1583	return rc;
1584
1585	for (unsigned i = 0; i < pThis->cbPcBios; i += 16)
1586	{
1587	/* If the DMI table is located at the expected place, patch the DMI table length and the checksum. */
1588	if ( pThis->pu8PcBios[i + 0x00] == '_'
1589	&& pThis->pu8PcBios[i + 0x01] == 'D'
1590	&& pThis->pu8PcBios[i + 0x02] == 'M'
1591	&& pThis->pu8PcBios[i + 0x03] == 'I'
1592	&& pThis->pu8PcBios[i + 0x04] == '_'
1593	&& (uint16_t)&pThis->pu8PcBios[i + 0x06] == 0)
1594	{
1595	(uint16_t)&pThis->pu8PcBios[i + 0x06] = RT_H2LE_U16(cbDmiTables);
1596	(uint16_t)&pThis->pu8PcBios[i + 0x0C] = RT_H2LE_U16(cNumDmiTables);
1597	uint8_t u8Sum = 0;
1598	for (unsigned j = 0; j < pThis->cbPcBios; j++)
1599	if (j != i + 0x05)
1600	u8Sum += pThis->pu8PcBios[j];
1601	pThis->pu8PcBios[i + 0x05] = -u8Sum;
1602	break;
1603	}
1604	}
1605
1606	if (pThis->u8IOAPIC)
1607	{
1608	FwCommonPlantMpsTable(pDevIns, pThis->au8DMIPage + VBOX_DMI_TABLE_SIZE,
1609	_4K - VBOX_DMI_TABLE_SIZE, pThis->cCpus);
1610	LogRel(("PcBios: MPS table at %08x\n", VBOX_DMI_TABLE_BASE + VBOX_DMI_TABLE_SIZE));
1611	}
1612
1613	rc = PDMDevHlpROMRegister(pDevIns, VBOX_DMI_TABLE_BASE, _4K, pThis->au8DMIPage, _4K,
1614	PGMPHYS_ROM_FLAGS_PERMANENT_BINARY, "DMI tables");
1615	if (RT_FAILURE(rc))
1616	return rc;
1617
1618	/*
1619	* Map the BIOS into memory.
1620	* There are two mappings:
1621	* 1. 0x000e0000 to 0x000fffff contains the last 128 kb of the bios.
1622	* The bios code might be 64 kb in size, and will then start at 0xf0000.
1623	* 2. 0xfffxxxxx to 0xffffffff contains the entire bios.
1624	*/
1625	AssertReleaseMsg(cbPcBiosBinary >= _64K, ("cbPcBiosBinary=%#x\n", cbPcBiosBinary));
1626	AssertReleaseMsg(RT_ALIGN_Z(cbPcBiosBinary, _64K) == cbPcBiosBinary,
1627	("cbPcBiosBinary=%#x\n", cbPcBiosBinary));
1628	cb = RT_MIN(cbPcBiosBinary, 128 * _1K); /* Effectively either 64 or 128K. */
1629	rc = PDMDevHlpROMRegister(pDevIns, 0x00100000 - cb, cb, &pu8PcBiosBinary[cbPcBiosBinary - cb], cb,
1630	PGMPHYS_ROM_FLAGS_PERMANENT_BINARY, "PC BIOS - 0xfffff");
1631	if (RT_FAILURE(rc))
1632	return rc;
1633	rc = PDMDevHlpROMRegister(pDevIns, (uint32_t)-(int32_t)cbPcBiosBinary, cbPcBiosBinary, pu8PcBiosBinary, cbPcBiosBinary,
1634	PGMPHYS_ROM_FLAGS_PERMANENT_BINARY, "PC BIOS - 0xffffffff");
1635	if (RT_FAILURE(rc))
1636	return rc;
1637
1638	/*
1639	* Get the LAN boot ROM file name.
1640	*/
1641	rc = CFGMR3QueryStringAlloc(pCfg, "LanBootRom", &pThis->pszLanBootFile);
1642	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
1643	{
1644	pThis->pszLanBootFile = NULL;
1645	rc = VINF_SUCCESS;
1646	}
1647	else if (RT_FAILURE(rc))
1648	return PDMDEV_SET_ERROR(pDevIns, rc,
1649	N_("Configuration error: Querying \"LanBootRom\" as a string failed"));
1650	else if (!*pThis->pszLanBootFile)
1651	{
1652	MMR3HeapFree(pThis->pszLanBootFile);
1653	pThis->pszLanBootFile = NULL;
1654	}
1655
1656	/*
1657	* Not loading LAN ROM for old CPUs.
1658	*/
1659	if ( enmMicroarch != kCpumMicroarch_Intel_8086
1660	&& enmMicroarch != kCpumMicroarch_Intel_80186
1661	&& enmMicroarch != kCpumMicroarch_NEC_V20
1662	&& enmMicroarch != kCpumMicroarch_NEC_V30
1663	&& enmMicroarch != kCpumMicroarch_Intel_80286)
1664	{
1665	const uint8_t *pu8LanBootBinary = NULL;
1666	uint64_t cbLanBootBinary;
1667	uint64_t cbFileLanBoot = 0;
1668
1669	/*
1670	* Open the LAN boot ROM and figure it size.
1671	* Determine the LAN boot ROM size, open specified ROM file in the process.
1672	*/
1673	if (pThis->pszLanBootFile)
1674	{
1675	RTFILE hFileLanBoot = NIL_RTFILE;
1676	rc = RTFileOpen(&hFileLanBoot, pThis->pszLanBootFile,
1677	RTFILE_O_READ \| RTFILE_O_OPEN \| RTFILE_O_DENY_WRITE);
1678	if (RT_SUCCESS(rc))
1679	{
1680	rc = RTFileGetSize(hFileLanBoot, &cbFileLanBoot);
1681	if (RT_SUCCESS(rc))
1682	{
1683	if (cbFileLanBoot <= _64K - (VBOX_LANBOOT_SEG << 4 & 0xffff))
1684	{
1685	LogRel(("PcBios: Using LAN ROM '%s' with a size of %#x bytes\n", pThis->pszLanBootFile, cbFileLanBoot));
1686
1687	/*
1688	* Allocate buffer for the LAN boot ROM data and load it.
1689	*/
1690	pThis->pu8LanBoot = (uint8_t *)PDMDevHlpMMHeapAllocZ(pDevIns, cbFileLanBoot);
1691	if (pThis->pu8LanBoot)
1692	{
1693	rc = RTFileRead(hFileLanBoot, pThis->pu8LanBoot, cbFileLanBoot, NULL);
1694	AssertLogRelRCReturnStmt(rc, RTFileClose(hFileLanBoot), rc);
1695	}
1696	else
1697	rc = VERR_NO_MEMORY;
1698	}
1699	else
1700	rc = VERR_TOO_MUCH_DATA;
1701	}
1702	RTFileClose(hFileLanBoot);
1703	}
1704	if (RT_FAILURE(rc))
1705	{
1706	/*
1707	* Play stupid and ignore failures, falling back to the built-in LAN boot ROM.
1708	*/
1709	/** @todo r=bird: This should have some kind of rational. We don't usually
1710	* ignore the VM configuration. */
1711	LogRel(("PcBios: Failed to open LAN boot ROM file '%s', rc=%Rrc!\n", pThis->pszLanBootFile, rc));
1712	MMR3HeapFree(pThis->pszLanBootFile);
1713	pThis->pszLanBootFile = NULL;
1714	}
1715	}
1716
1717	/* If we were unable to get the data from file for whatever reason, fall
1718	* back to the built-in LAN boot ROM image.
1719	*/
1720	if (pThis->pu8LanBoot == NULL)
1721	{
1722	#ifdef VBOX_WITH_PXE_ROM
1723	pu8LanBootBinary = g_abNetBiosBinary;
1724	cbLanBootBinary = g_cbNetBiosBinary;
1725	#endif
1726	}
1727	else
1728	{
1729	pu8LanBootBinary = pThis->pu8LanBoot;
1730	cbLanBootBinary = cbFileLanBoot;
1731	}
1732
1733	/*
1734	* Map the Network Boot ROM into memory.
1735	*
1736	* Currently there is a fixed mapping: 0x000e2000 to 0x000effff contains
1737	* the (up to) 56 kb ROM image. The mapping size is fixed to trouble with
1738	* the saved state (in PGM).
1739	*/
1740	if (pu8LanBootBinary)
1741	{
1742	pThis->cbLanBoot = cbLanBootBinary;
1743
1744	rc = PDMDevHlpROMRegister(pDevIns, VBOX_LANBOOT_SEG << 4,
1745	RT_MAX(cbLanBootBinary, _64K - (VBOX_LANBOOT_SEG << 4 & 0xffff)),
1746	pu8LanBootBinary, cbLanBootBinary,
1747	PGMPHYS_ROM_FLAGS_SHADOWED, "Net Boot ROM");
1748	AssertRCReturn(rc, rc);
1749	}
1750	}
1751	else if (pThis->pszLanBootFile)
1752	LogRel(("PcBios: Skipping LAN ROM '%s' due to ancient target CPU.\n", pThis->pszLanBootFile));
1753	#ifdef VBOX_WITH_PXE_ROM
1754	else
1755	LogRel(("PcBios: Skipping built in ROM due to ancient target CPU.\n"));
1756	#endif
1757
1758	/*
1759	* Configure Boot delay.
1760	*/
1761	rc = CFGMR3QueryU8Def(pCfg, "DelayBoot", &pThis->uBootDelay, 0);
1762	if (RT_FAILURE(rc))
1763	return PDMDEV_SET_ERROR(pDevIns, rc,
1764	N_("Configuration error: Querying \"DelayBoot\" as integer failed"));
1765	if (pThis->uBootDelay > 15)
1766	pThis->uBootDelay = 15;
1767
1768
1769	/*
1770	* Read shutdown status code config and register ourselves as the firmware device.
1771	*/
1772
1773	/** @cfgm{CheckShutdownStatusForSoftReset, boolean, true}
1774	* Whether to consult the shutdown status code (CMOS register 0Fh) to
1775	* determine whether the guest intended a soft or hard reset. Currently only
1776	* shutdown status codes 05h, 09h and 0Ah are considered soft reset. */
1777	rc = CFGMR3QueryBoolDef(pCfg, "CheckShutdownStatusForSoftReset", &pThis->fCheckShutdownStatusForSoftReset, true);
1778	AssertLogRelRCReturn(rc, rc);
1779
1780	/** @cfgm{ClearShutdownStatusOnHardReset, boolean, true}
1781	* Whether to clear the shutdown status code (CMOS register 0Fh) on hard reset. */
1782	rc = CFGMR3QueryBoolDef(pCfg, "ClearShutdownStatusOnHardReset", &pThis->fClearShutdownStatusOnHardReset, true);
1783	AssertLogRelRCReturn(rc, rc);
1784
1785	LogRel(("PcBios: fCheckShutdownStatusForSoftReset=%RTbool fClearShutdownStatusOnHardReset=%RTbool\n",
1786	pThis->fCheckShutdownStatusForSoftReset, pThis->fClearShutdownStatusOnHardReset));
1787
1788	static PDMFWREG const s_FwReg = { PDM_FWREG_VERSION, pcbiosFw_IsHardReset, PDM_FWREG_VERSION };
1789	rc = PDMDevHlpFirmwareRegister(pDevIns, &s_FwReg, &pThis->pFwHlpR3);
1790	AssertLogRelRCReturn(rc, rc);
1791
1792	return VINF_SUCCESS;
1793	}
1794
1795
1796	/**
1797	* The device registration structure.
1798	*/
1799	const PDMDEVREG g_DevicePcBios =
1800	{
1801	/* u32Version */
1802	PDM_DEVREG_VERSION,
1803	/* szName */
1804	"pcbios",
1805	/* szRCMod */
1806	"",
1807	/* szR0Mod */
1808	"",
1809	/* pszDescription */
1810	"PC BIOS Device",
1811	/* fFlags */
1812	PDM_DEVREG_FLAGS_HOST_BITS_DEFAULT \| PDM_DEVREG_FLAGS_GUEST_BITS_32_64,
1813	/* fClass */
1814	PDM_DEVREG_CLASS_ARCH_BIOS,
1815	/* cMaxInstances */
1816	1,
1817	/* cbInstance */
1818	sizeof(DEVPCBIOS),
1819	/* pfnConstruct */
1820	pcbiosConstruct,
1821	/* pfnDestruct */
1822	pcbiosDestruct,
1823	/* pfnRelocate */
1824	NULL,
1825	/* pfnMemSetup */
1826	pcbiosMemSetup,
1827	/* pfnPowerOn */
1828	NULL,
1829	/* pfnReset */
1830	pcbiosReset,
1831	/* pfnSuspend */
1832	NULL,
1833	/* pfnResume */
1834	NULL,
1835	/* pfnAttach */
1836	NULL,
1837	/* pfnDetach */
1838	NULL,
1839	/* pfnQueryInterface. */
1840	NULL,
1841	/* pfnInitComplete. */
1842	pcbiosInitComplete,
1843	/* pfnPowerOff */
1844	NULL,
1845	/* pfnSoftReset */
1846	NULL,
1847	/* u32VersionEnd */
1848	PDM_DEVREG_VERSION
1849	};
1850

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source: vbox/trunk/src/VBox/Devices/PC/DevPcBios.cpp@ 68155

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