DevPcBios.cpp@ 100836

Last change on this file since 100836 was 100456, checked in by vboxsync, 17 months ago
BIOS: Added a way for the APM BIOS to halt the virtual CPU through port I/O instead of HLT to solve problems with obstinate guests (see bugref:6549).
Property svn:eol-style set to `native` Property svn:keywords set to `Id Revision`
File size: 74.7 KB

Line
1	/* $Id: DevPcBios.cpp 100456 2023-07-10 13:46:21Z vboxsync $ */
2	/** @file
3	* DevPcBios - PC BIOS Device.
4	*/
5
6	/*
7	* Copyright (C) 2006-2023 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/*********************************************************************************************************************************
30	* Header Files *
31	*********************************************************************************************************************************/
32	#define LOG_GROUP LOG_GROUP_DEV_PC_BIOS
33	#include <VBox/vmm/pdmdev.h>
34	#include <VBox/vmm/pdmstorageifs.h>
35	#include <VBox/vmm/mm.h>
36	#include <VBox/vmm/pgm.h>
37	#include <VBox/vmm/cpum.h>
38
39	#include <VBox/log.h>
40	#include <iprt/asm.h>
41	#include <iprt/assert.h>
42	#include <iprt/buildconfig.h>
43	#include <iprt/file.h>
44	#include <iprt/mem.h>
45	#include <iprt/string.h>
46	#include <iprt/uuid.h>
47	#include <iprt/cdefs.h>
48	#include <VBox/bios.h>
49	#include <VBox/err.h>
50	#include <VBox/param.h>
51
52	#include "VBoxDD.h"
53	#include "VBoxDD2.h"
54	#include "DevPcBios.h"
55	#include "DevFwCommon.h"
56
57	#define NET_BOOT_DEVS 4
58
59
60	/** @page pg_devbios_cmos_assign CMOS Assignments (BIOS)
61	*
62	* The BIOS uses a CMOS to store configuration data.
63	* It is currently used as follows:
64	*
65	* @verbatim
66	First CMOS bank (offsets 0x00 to 0x7f):
67	Floppy drive type:
68	0x10
69	Hard disk type (old):
70	0x12
71	Equipment byte:
72	0x14
73	Base memory:
74	0x15
75	0x16
76	Extended memory:
77	0x17
78	0x18
79	0x30
80	0x31
81	First IDE HDD:
82	0x19
83	0x1e - 0x25
84	Second IDE HDD:
85	0x1a
86	0x26 - 0x2d
87	Checksum of 0x10-0x2d:
88	0x2e
89	0x2f
90	Amount of memory above 16M and below 4GB in 64KB units:
91	0x34
92	0x35
93	Boot device (BOCHS BIOS specific):
94	0x38
95	0x3c
96	0x3d
97	PXE debug:
98	0x3f
99	First SATA HDD:
100	0x40 - 0x47
101	Second SATA HDD:
102	0x48 - 0x4f
103	Third SATA HDD:
104	0x50 - 0x57
105	Fourth SATA HDD:
106	0x58 - 0x5f
107	Number of CPUs:
108	0x60
109	RAM above 4G in 64KB units:
110	0x61 - 0x65
111	Third IDE HDD:
112	0x67 - 0x6e
113	Fourth IDE HDD:
114	0x70 - 0x77
115	APIC/x2APIC settings:
116	0x78
117
118	Second CMOS bank (offsets 0x80 to 0xff):
119	Reserved for internal use by PXE ROM:
120	0x80 - 0x81
121	First net boot device PCI bus/dev/fn:
122	0x82 - 0x83
123	Second to third net boot devices:
124	0x84 - 0x89
125	First SCSI HDD:
126	0x90 - 0x97
127	Second SCSI HDD:
128	0x98 - 0x9f
129	Third SCSI HDD:
130	0xa0 - 0xa7
131	Fourth SCSI HDD:
132	0xa8 - 0xaf
133
134	@endverbatim
135	*
136	* @todo Mark which bits are compatible with which BIOSes and
137	* which are our own definitions.
138	*/
139
140
141	/*********************************************************************************************************************************
142	* Structures and Typedefs *
143	*********************************************************************************************************************************/
144
145	/**
146	* The boot device.
147	*/
148	typedef enum DEVPCBIOSBOOT
149	{
150	DEVPCBIOSBOOT_NONE,
151	DEVPCBIOSBOOT_FLOPPY,
152	DEVPCBIOSBOOT_HD,
153	DEVPCBIOSBOOT_DVD,
154	DEVPCBIOSBOOT_LAN
155	} DEVPCBIOSBOOT;
156
157	/**
158	* PC Bios instance data structure.
159	*/
160	typedef struct DEVPCBIOS
161	{
162	/** Pointer back to the device instance. */
163	PPDMDEVINS pDevIns;
164
165	/** Boot devices (ordered). */
166	DEVPCBIOSBOOT aenmBootDevice[4];
167	/** Bochs control string index. */
168	uint32_t iControl;
169	/** Floppy device. */
170	char *pszFDDevice;
171	/** Harddisk device. */
172	char *pszHDDevice;
173	/** Sata harddisk device. */
174	char *pszSataDevice;
175	/** LUNs of the four BIOS-accessible SATA disks. */
176	uint32_t iSataHDLUN[4];
177	/** SCSI harddisk device. */
178	char *pszScsiDevice;
179	/** LUNs of the four BIOS-accessible SCSI disks. */
180	uint32_t iScsiHDLUN[4];
181	/** Bios message buffer. */
182	char szMsg[256];
183	/** Bios message buffer index. */
184	uint32_t iMsg;
185	/** The system BIOS ROM data. */
186	uint8_t *pu8PcBios;
187	/** The size of the system BIOS ROM. */
188	uint32_t cbPcBios;
189	/** The name of the BIOS ROM file. */
190	char *pszPcBiosFile;
191	/** The LAN boot ROM data. */
192	uint8_t *pu8LanBoot;
193	/** The name of the LAN boot ROM file. */
194	char *pszLanBootFile;
195	/** The size of the LAN boot ROM. */
196	uint64_t cbLanBoot;
197	/** The DMI tables. */
198	uint8_t au8DMIPage[0x1000];
199	/** The boot countdown (in seconds). */
200	uint8_t uBootDelay;
201	/** I/O-APIC enabled? */
202	uint8_t u8IOAPIC;
203	/** APIC mode to be set up by BIOS */
204	uint8_t u8APICMode;
205	/** PXE debug logging enabled? */
206	uint8_t u8PXEDebug;
207	/** Physical address of the MP table. */
208	uint32_t u32MPTableAddr;
209	/** PXE boot PCI bus/dev/fn list. */
210	uint16_t au16NetBootDev[NET_BOOT_DEVS];
211	/** Number of logical CPUs in guest */
212	uint16_t cCpus;
213	/* Physical address of PCI config space MMIO region. Currently unused. */
214	uint64_t u64McfgBase;
215	/* Length of PCI config space MMIO region. Currently unused. */
216	uint64_t cbMcfgLength;
217
218	/** Firmware registration structure. */
219	PDMFWREG FwReg;
220	/** Dummy. */
221	PCPDMFWHLPR3 pFwHlpR3;
222	/** Number of soft resets we've logged. */
223	uint32_t cLoggedSoftResets;
224	/** Whether to consult the shutdown status (CMOS[0xf]) for deciding upon soft
225	* or hard reset. */
226	bool fCheckShutdownStatusForSoftReset;
227	/** Whether to clear the shutdown status on hard reset. */
228	bool fClearShutdownStatusOnHardReset;
229	/** Current port number for BIOS control (used by APM). */
230	RTIOPORT ControlPort;
231	/** True=use new port number for BIOS control (used by APM). */
232	bool fNewControlPort;
233	bool afPadding[3+4];
234	/** The BIOS I/O port, either at 0x040f or 0x8900
235	* (old saved state). */
236	IOMMMIOHANDLE hIoPortControl;
237	} DEVPCBIOS;
238	/** Pointer to the BIOS device state. */
239	typedef DEVPCBIOS *PDEVPCBIOS;
240
241
242	/*********************************************************************************************************************************
243	* Defined Constants And Macros *
244	*********************************************************************************************************************************/
245	/** The saved state version. */
246	#define PCBIOS_SSM_VERSION 0
247
248
249	/*********************************************************************************************************************************
250	* Global Variables *
251	*********************************************************************************************************************************/
252	/** Saved state DEVPCBIOS field descriptors. */
253	static SSMFIELD const g_aPcBiosFields[] =
254	{
255	SSMFIELD_ENTRY( DEVPCBIOS, fNewControlPort),
256	SSMFIELD_ENTRY_TERM()
257	};
258
259
260	/**
261	* @callback_method_impl{FNIOMIOPORTNEWIN, Bochs Debug.}
262	*/
263	static DECLCALLBACK(VBOXSTRICTRC)
264	pcbiosIOPortDebugRead(PPDMDEVINS pDevIns, void pvUser, RTIOPORT offPort, uint32_t pu32, unsigned cb)
265	{
266	RT_NOREF5(pDevIns, pvUser, offPort, pu32, cb);
267	return VERR_IOM_IOPORT_UNUSED;
268	}
269
270
271	/**
272	* @callback_method_impl{FNIOMIOPORTNEWOUT, Bochs Debug.}
273	*/
274	static DECLCALLBACK(VBOXSTRICTRC)
275	pcbiosIOPortDebugWrite(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT offPort, uint32_t u32, unsigned cb)
276	{
277	PDEVPCBIOS pThis = PDMDEVINS_2_DATA(pDevIns, PDEVPCBIOS);
278	RT_NOREF(pvUser);
279	Assert(offPort < 4);
280
281	/*
282	* Bochs BIOS char printing.
283	*/
284	if ( cb == 1
285	&& ( offPort == 2
286	\|\| offPort == 3))
287	{
288	/* The raw version. */
289	switch (u32)
290	{
291	case '\r': Log2(("pcbios: <return>\n")); break;
292	case '\n': Log2(("pcbios: <newline>\n")); break;
293	case '\t': Log2(("pcbios: <tab>\n")); break;
294	default: Log2(("pcbios: %c (%02x)\n", u32, u32)); break;
295	}
296
297	/* The readable, buffered version. */
298	uint32_t iMsg = pThis->iMsg;
299	if (u32 == '\n' \|\| u32 == '\r')
300	{
301	AssertStmt(iMsg < sizeof(pThis->szMsg), iMsg = sizeof(pThis->szMsg) - 1);
302	pThis->szMsg[iMsg] = '\0';
303	if (iMsg)
304	Log(("pcbios: %s\n", pThis->szMsg));
305	iMsg = 0;
306	}
307	else
308	{
309	if (iMsg >= sizeof(pThis->szMsg) - 1)
310	{
311	pThis->szMsg[iMsg] = '\0';
312	Log(("pcbios: %s\n", pThis->szMsg));
313	iMsg = 0;
314	}
315	pThis->szMsg[iMsg] = (char)u32;
316	pThis->szMsg[++iMsg] = '\0';
317	}
318	pThis->iMsg = iMsg;
319	return VINF_SUCCESS;
320	}
321
322	/* not in use. */
323	return VINF_SUCCESS;
324	}
325
326
327	/**
328	* @callback_method_impl{FNIOMIOPORTNEWIN, BIOS control port.}
329	*/
330	static DECLCALLBACK(VBOXSTRICTRC)
331	pcbiosIOPortControlRead(PPDMDEVINS pDevIns, void pvUser, RTIOPORT offPort, uint32_t pu32, unsigned cb)
332	{
333	RT_NOREF5(pDevIns, pvUser, offPort, pu32, cb);
334	return VERR_IOM_IOPORT_UNUSED;
335	}
336
337
338	static VBOXSTRICTRC pcbiosApmShutdown(PPDMDEVINS pDevIns)
339	{
340	LogRel(("PcBios: APM shutdown request\n"));
341	return PDMDevHlpVMPowerOff(pDevIns);
342	}
343
344
345	static VBOXSTRICTRC pcbiosApmIdle(PPDMDEVINS pDevIns)
346	{
347	Log3(("PcBios: APM idle request\n"));
348
349	/* This request is used to put the CPU into a halted state without using
350	* a HLT instruction. This is especially useful for the APM BIOS
351	* in situations where executing HLT causes problems. See BIOS APM source
352	* code for comments.
353	* NB: The CPU will be woken up by an interrupt regardless of the
354	* state of rFLAGS.IF.
355	*/
356	int rc = PDMDevHlpVMWaitForDeviceReady(pDevIns, PDMDevHlpGetCurrentCpuId(pDevIns));
357	return rc;
358	}
359
360	static void pcbiosReportBootFail(PPDMDEVINS pDevIns)
361	{
362	LogRel(("PcBios: Boot failure\n"));
363	int rc = PDMDevHlpVMSetRuntimeError(pDevIns, 0 /fFlags/, "VMBootFail",
364	N_("The VM failed to boot. This is possibly caused by not having an operating system installed or a misconfigured boot order. Maybe picking a guest OS install DVD will resolve the situation"));
365	AssertRC(rc);
366	}
367
368
369	/**
370	* @callback_method_impl{FNIOMIOPORTNEWOUT, BIOS control port.}
371	*/
372	static DECLCALLBACK(VBOXSTRICTRC)
373	pcbiosIOPortControlWrite(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT offPort, uint32_t u32, unsigned cb)
374	{
375	PDEVPCBIOS pThis = PDMDEVINS_2_DATA(pDevIns, PDEVPCBIOS);
376	RT_NOREF(pvUser, offPort);
377	Assert(offPort == 0);
378
379	if (cb == 1)
380	{
381	static const unsigned char s_szShutdown[] = "Shutdown";
382	static const unsigned char s_szBootfail[] = "Bootfail";
383	static const unsigned char s_szProchalt[] = "Prochalt";
384	AssertCompile(sizeof(s_szShutdown) == sizeof(s_szBootfail));
385	AssertCompile(sizeof(s_szShutdown) == sizeof(s_szProchalt));
386
387	if (pThis->iControl < sizeof(s_szShutdown)) /* paranoia */
388	{
389	if (u32 == s_szShutdown[pThis->iControl])
390	{
391
392	pThis->iControl++;
393	if (pThis->iControl >= 8)
394	{
395	pThis->iControl = 0;
396	return pcbiosApmShutdown(pDevIns);
397	}
398	}
399	else if (u32 == s_szBootfail[pThis->iControl])
400	{
401	pThis->iControl++;
402	if (pThis->iControl >= 8)
403	{
404	pThis->iControl = 0;
405	pcbiosReportBootFail(pDevIns);
406	}
407	}
408	else if (u32 == s_szProchalt[pThis->iControl])
409	{
410
411	pThis->iControl++;
412	if (pThis->iControl >= 8)
413	{
414	pThis->iControl = 0;
415	return pcbiosApmIdle(pDevIns);
416	}
417	}
418	else
419	pThis->iControl = 0;
420	}
421	else
422	pThis->iControl = 0;
423	}
424	else if (cb == 2)
425	{
426	pThis->iControl = 0;
427	/* Shortcuts for BIOS control, allowing guest to use one simple 16-bit I/O port write. */
428	switch (u32)
429	{
430	case VBOX_BIOS_CTL_SHUTDOWN:
431	return pcbiosApmShutdown(pDevIns);
432	case VBOX_BIOS_CTL_BOOTFAIL:
433	pcbiosReportBootFail(pDevIns);
434	break;
435	case VBOX_BIOS_CTL_PROCHALT:
436	return pcbiosApmIdle(pDevIns);
437	default:
438	/* Ignore and do nothing. */
439	LogFunc(("unrecognized control value (u32=%X)\n", u32));
440	}
441	}
442	/* else: not in use. */
443
444	return VINF_SUCCESS;
445	}
446
447
448	/**
449	* Register the BIOS control port.
450	* This is used by pcbiosConstruct, pcbiosReset and pcbiosLoadExec.
451	*/
452	static int pcbiosRegisterControl(PPDMDEVINS pDevIns, PDEVPCBIOS pThis, bool fNewControlPort)
453	{
454	if (pThis->ControlPort != 0)
455	{
456	int rc = PDMDevHlpIoPortUnmap(pDevIns, pThis->hIoPortControl);
457	AssertRC(rc);
458	}
459
460	pThis->fNewControlPort = fNewControlPort;
461	if (fNewControlPort)
462	pThis->ControlPort = VBOX_BIOS_SHUTDOWN_PORT;
463	else
464	pThis->ControlPort = VBOX_BIOS_OLD_SHUTDOWN_PORT;
465	return PDMDevHlpIoPortMap(pDevIns, pThis->hIoPortControl, pThis->ControlPort);
466	}
467
468
469	/**
470	* @callback_method_impl{FNSSMDEVSAVEEXEC}
471	*/
472	static DECLCALLBACK(int) pcbiosSaveExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM)
473	{
474	PDEVPCBIOS pThis = PDMDEVINS_2_DATA(pDevIns, PDEVPCBIOS);
475	return pDevIns->pHlpR3->pfnSSMPutStruct(pSSM, pThis, g_aPcBiosFields);
476	}
477
478
479	/**
480	* @callback_method_impl{FNSSMDEVLOADPREP,
481	* Clears the fNewControlPort flag prior to loading the state so that old
482	* saved VM states keeps using the old port address (no pcbios state)}
483	*/
484	static DECLCALLBACK(int) pcbiosLoadPrep(PPDMDEVINS pDevIns, PSSMHANDLE pSSM)
485	{
486	RT_NOREF(pSSM);
487	PDEVPCBIOS pThis = PDMDEVINS_2_DATA(pDevIns, PDEVPCBIOS);
488
489	/* Since there are legacy saved state files without any SSM data for PCBIOS
490	* this is the only way to handle them correctly. */
491	pThis->fNewControlPort = false;
492
493	return VINF_SUCCESS;
494	}
495
496
497	/**
498	* @callback_method_impl{FNSSMDEVLOADEXEC}
499	*/
500	static DECLCALLBACK(int) pcbiosLoadExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
501	{
502	PDEVPCBIOS pThis = PDMDEVINS_2_DATA(pDevIns, PDEVPCBIOS);
503
504	if (uVersion > PCBIOS_SSM_VERSION)
505	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
506	Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
507
508	return pDevIns->pHlpR3->pfnSSMGetStruct(pSSM, pThis, g_aPcBiosFields);
509	}
510
511
512	/**
513	* @callback_method_impl{FNSSMDEVLOADDONE,
514	* Updates the shutdown port registration to match the flag loaded (or not).}
515	*/
516	static DECLCALLBACK(int) pcbiosLoadDone(PPDMDEVINS pDevIns, PSSMHANDLE pSSM)
517	{
518	RT_NOREF(pSSM);
519	PDEVPCBIOS pThis = PDMDEVINS_2_DATA(pDevIns, PDEVPCBIOS);
520	return pcbiosRegisterControl(pDevIns, pThis, pThis->fNewControlPort);
521	}
522
523
524	/**
525	* Write to CMOS memory.
526	* This is used by the init complete code.
527	*/
528	static void pcbiosCmosWrite(PPDMDEVINS pDevIns, int off, uint32_t u32Val)
529	{
530	Assert(off < 256);
531	Assert(u32Val < 256);
532
533	int rc = PDMDevHlpCMOSWrite(pDevIns, off, u32Val);
534	AssertRC(rc);
535	}
536
537
538	/**
539	* Read from CMOS memory.
540	* This is used by the init complete code.
541	*/
542	static uint8_t pcbiosCmosRead(PPDMDEVINS pDevIns, unsigned off)
543	{
544	Assert(off < 256);
545
546	uint8_t u8val;
547	int rc = PDMDevHlpCMOSRead(pDevIns, off, &u8val);
548	AssertRC(rc);
549
550	return u8val;
551	}
552
553
554	/**
555	* @interface_method_impl{PDMFWREG,pfnIsHardReset}
556	*/
557	static DECLCALLBACK(bool) pcbiosFw_IsHardReset(PPDMDEVINS pDevIns, uint32_t fFlags)
558	{
559	RT_NOREF1(fFlags);
560	PDEVPCBIOS pThis = PDMDEVINS_2_DATA(pDevIns, PDEVPCBIOS);
561	if (pThis->fCheckShutdownStatusForSoftReset)
562	{
563	uint8_t bShutdownStatus = pcbiosCmosRead(pDevIns, 0xf);
564	if ( bShutdownStatus == 0x5
565	\|\| bShutdownStatus == 0x9
566	\|\| bShutdownStatus == 0xa)
567	{
568	const uint32_t cMaxLogged = 10;
569	if (pThis->cLoggedSoftResets < cMaxLogged)
570	{
571	RTFAR16 Far16 = { 0xfeed, 0xface };
572	PDMDevHlpPhysRead(pDevIns, 0x467, &Far16, sizeof(Far16));
573	pThis->cLoggedSoftResets++;
574	LogRel(("PcBios: Soft reset #%u - shutdown status %#x, warm reset vector (0040:0067) is %04x:%04x%s\n",
575	pThis->cLoggedSoftResets, bShutdownStatus, Far16.sel, Far16.off,
576	pThis->cLoggedSoftResets < cMaxLogged ? "." : " - won't log any more!"));
577	}
578	return false;
579	}
580	}
581	return true;
582	}
583
584
585	/**
586	* @interface_method_impl{PDMDEVREG,pfnReset}
587	*/
588	static DECLCALLBACK(void) pcbiosReset(PPDMDEVINS pDevIns)
589	{
590	PDEVPCBIOS pThis = PDMDEVINS_2_DATA(pDevIns, PDEVPCBIOS);
591
592	if (pThis->fClearShutdownStatusOnHardReset)
593	{
594	uint8_t bShutdownStatus = pcbiosCmosRead(pDevIns, 0xf);
595	if (bShutdownStatus != 0)
596	{
597	LogRel(("PcBios: Clearing shutdown status code %02x.\n", bShutdownStatus));
598	pcbiosCmosWrite(pDevIns, 0xf, 0);
599	}
600	}
601
602	/* After reset the new BIOS code is active, use the new control port. */
603	pcbiosRegisterControl(pDevIns, pThis, true /* fNewControlPort */);
604	}
605
606
607	/**
608	* Attempt to guess the LCHS disk geometry from the MS-DOS master boot record
609	* (partition table).
610	*
611	* @returns VBox status code.
612	* @param pMedia The media device interface of the disk.
613	* @param pLCHSGeometry Where to return the disk geometry on success
614	*/
615	static int biosGuessDiskLCHS(PPDMIMEDIA pMedia, PPDMMEDIAGEOMETRY pLCHSGeometry)
616	{
617	uint8_t aMBR[512], *p;
618	int rc;
619	uint32_t iEndHead, iEndSector, cLCHSCylinders, cLCHSHeads, cLCHSSectors;
620
621	if (!pMedia)
622	return VERR_INVALID_PARAMETER;
623	rc = pMedia->pfnReadPcBios(pMedia, 0, aMBR, sizeof(aMBR));
624	if (RT_FAILURE(rc))
625	return rc;
626	/* Test MBR magic number. */
627	if (aMBR[510] != 0x55 \|\| aMBR[511] != 0xaa)
628	return VERR_INVALID_PARAMETER;
629	for (uint32_t i = 0; i < 4; i++)
630	{
631	/* Figure out the start of a partition table entry. */
632	p = &aMBR[0x1be + i * 16];
633	iEndHead = p[5];
634	iEndSector = p[6] & 63;
635	if ((p[12] \| p[13] \| p[14] \| p[15]) && iEndSector && iEndHead)
636	{
637	/* Assumption: partition terminates on a cylinder boundary. */
638	cLCHSHeads = iEndHead + 1;
639	cLCHSSectors = iEndSector;
640	cLCHSCylinders = RT_MIN(1024, pMedia->pfnGetSize(pMedia) / (512 * cLCHSHeads * cLCHSSectors));
641	if (cLCHSCylinders >= 1)
642	{
643	pLCHSGeometry->cCylinders = cLCHSCylinders;
644	pLCHSGeometry->cHeads = cLCHSHeads;
645	pLCHSGeometry->cSectors = cLCHSSectors;
646	Log(("%s: LCHS=%d %d %d\n", __FUNCTION__, cLCHSCylinders, cLCHSHeads, cLCHSSectors));
647	return VINF_SUCCESS;
648	}
649	}
650	}
651	return VERR_INVALID_PARAMETER;
652	}
653
654
655	/* Several common PC/AT BIOS drive types. Corresponds to IBM BIOS drive tables. */
656	PDMMEDIAGEOMETRY aGeomPCAT[] = {
657	/* cyls heads sectors */
658	{ 0, 0, 0 }, /* Type 0 is not used */
659	{ 306, 4, 17 }, /* Type 1, 10MB */
660	{ 615, 4, 17 }, /* Type 2, 20MB */
661	{ 615, 6, 17 }, /* Type 3, 30MB */
662	{ 940, 8, 17 }, /* Type 4, 62MB */
663	{ 940, 6, 17 }, /* Type 5, 47MB */
664	{ 615, 4, 17 }, /* Type 6, 20MB (different WPCOMP from Type 2) */
665	{ 462, 8, 17 }, /* Type 7, 30MB */
666	{ 733, 5, 17 }, /* Type 8, 30MB */
667	{ 900, 15, 17 }, /* Type 9, 117MB */
668
669	{ 820, 3, 17 }, /* Type 10, 21MB */
670	{ 855, 5, 17 }, /* Type 11, 37MB */
671	{ 855, 7, 17 }, /* Type 12, 52MB */
672	{ 306, 8, 17 }, /* Type 13, 21MB */
673	{ 733, 7, 17 }, /* Type 14, 45MB */
674	{ 0, 0, 0 }, /* Type 15 is not used */
675	{ 612, 4, 17 }, /* Type 16, 21MB */
676	{ 977, 5, 17 }, /* Type 17, 43MB */
677	{ 977, 7, 17 }, /* Type 18, 60MB */
678	{ 1024, 7, 17 }, /* Type 19, 62MB */
679
680	{ 733, 5, 17 }, /* Type 20, 32MB */
681	{ 733, 7, 17 }, /* Type 21, 45MB */
682	{ 733, 5, 17 }, /* Type 22, 32MB */
683	{ 306, 4, 17 }, /* Type 23, 10MB */
684	};
685
686	/**
687	* Attempts to initialize CMOS data for a hard disk matching one of
688	* the PC/AT BIOS types. Only applicable to the first two drives.
689	* Returns true if drive is one of the few recognized types.
690	*/
691	static bool pcbiosCmosTryPCATHardDisk(PPDMDEVINS pDevIns, int drive, PCPDMMEDIAGEOMETRY pLCHSGeometry)
692	{
693	unsigned type;
694	unsigned typeLow;
695	bool fCompatGeom = false;
696
697	Assert((drive == 0) \|\| (drive == 1));
698
699	/* See if drive geometry is one of the ancient PC/AT BIOS types. */
700	for (type = 0; type < RT_ELEMENTS(aGeomPCAT); ++type) {
701	if ( (aGeomPCAT[type].cCylinders == pLCHSGeometry->cCylinders)
702	&& (aGeomPCAT[type].cHeads == pLCHSGeometry->cHeads )
703	&& (aGeomPCAT[type].cSectors == pLCHSGeometry->cSectors )) {
704	LogRel(("PcBios: Recognized ATA hard disk %d as PC/AT BIOS type %d\n", drive, type));
705	fCompatGeom = true;
706	break;
707	}
708	}
709
710	if (fCompatGeom) {
711	uint32_t u32;
712
713	/* For types below 15, the type is in CMOS byte 0x12.
714	* NB: The type for drive 0 is in the high nibble, drive 1
715	* is in the low nibble.
716	* For drive types above 15, CMOS byte 0x12 is set to 15
717	* and actual drive type is in byte 0x19 (drive 0) or
718	* byte 0x1a (drive 1).
719	*/
720	typeLow = type < 15 ? type : 15;
721
722	/* Always update CMOS byte 0x12. */
723	u32 = pcbiosCmosRead(pDevIns, 0x12);
724	u32 &= 0x0f << (4 * drive);
725	u32 \|= typeLow << (4 - 4 * drive);
726	pcbiosCmosWrite(pDevIns, 0x12, u32);
727
728	/* For higher drive types, also update CMOS byte 0x19/0x1a. */
729	if (type > 15) {
730	u32 = type;
731	pcbiosCmosWrite(pDevIns, 0x19 + drive, u32);
732	}
733	}
734
735	return fCompatGeom;
736	}
737
738
739	/**
740	* Initializes the CMOS data for one harddisk.
741	*/
742	static void pcbiosCmosInitHardDisk(PPDMDEVINS pDevIns, int offType, int offInfo, PCPDMMEDIAGEOMETRY pLCHSGeometry)
743	{
744	Log2(("%s: offInfo=%#x: LCHS=%d/%d/%d\n", __FUNCTION__, offInfo, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
745	if (offType) {
746	uint32_t u32;
747	int drive;
748
749	Assert(offType == 0x1a \|\| offType == 0x19);
750	drive = offType == 0x19 ? 0 : 1;
751
752	/* Update CMOS byte 12h. It will always be set to type 0fh for this disk. */
753	u32 = pcbiosCmosRead(pDevIns, 0x12);
754	u32 &= 0x0f << (4 * drive);
755	u32 \|= 0x0f << (4 - 4 * drive);
756	pcbiosCmosWrite(pDevIns, 0x12, u32);
757
758	/* Now write the extended drive type at offset 19h or 1Ah. */
759	pcbiosCmosWrite(pDevIns, offType, 47);
760	}
761	/* Cylinders low */
762	pcbiosCmosWrite(pDevIns, offInfo + 0, RT_MIN(pLCHSGeometry->cCylinders, 1024) & 0xff);
763	/* Cylinders high */
764	pcbiosCmosWrite(pDevIns, offInfo + 1, RT_MIN(pLCHSGeometry->cCylinders, 1024) >> 8);
765	/* Heads */
766	pcbiosCmosWrite(pDevIns, offInfo + 2, pLCHSGeometry->cHeads);
767	/* Landing zone low */
768	pcbiosCmosWrite(pDevIns, offInfo + 3, 0xff);
769	/* Landing zone high */
770	pcbiosCmosWrite(pDevIns, offInfo + 4, 0xff);
771	/* Write precomp low */
772	pcbiosCmosWrite(pDevIns, offInfo + 5, 0xff);
773	/* Write precomp high */
774	pcbiosCmosWrite(pDevIns, offInfo + 6, 0xff);
775	/* Sectors */
776	pcbiosCmosWrite(pDevIns, offInfo + 7, pLCHSGeometry->cSectors);
777	}
778
779
780	/**
781	* Set logical CHS geometry for a hard disk
782	*
783	* @returns VBox status code.
784	* @param pBase Base interface for the device.
785	* @param pHardDisk The hard disk.
786	* @param pLCHSGeometry Where to store the geometry settings.
787	*/
788	static int setLogicalDiskGeometry(PPDMIBASE pBase, PPDMIMEDIA pHardDisk, PPDMMEDIAGEOMETRY pLCHSGeometry)
789	{
790	RT_NOREF1(pBase);
791
792	PDMMEDIAGEOMETRY LCHSGeometry;
793	int rc = pHardDisk->pfnBiosGetLCHSGeometry(pHardDisk, &LCHSGeometry);
794	if ( rc == VERR_PDM_GEOMETRY_NOT_SET
795	\|\| LCHSGeometry.cCylinders == 0
796	\|\| LCHSGeometry.cHeads == 0
797	\|\| LCHSGeometry.cHeads > 255
798	\|\| LCHSGeometry.cSectors == 0
799	\|\| LCHSGeometry.cSectors > 63)
800	{
801	/* No LCHS geometry, autodetect and set. */
802	rc = biosGuessDiskLCHS(pHardDisk, &LCHSGeometry);
803	if (RT_FAILURE(rc))
804	{
805	/* Try if PCHS geometry works, otherwise fall back. */
806	rc = pHardDisk->pfnBiosGetPCHSGeometry(pHardDisk, &LCHSGeometry);
807	}
808	if ( RT_FAILURE(rc)
809	\|\| LCHSGeometry.cCylinders == 0
810	\|\| LCHSGeometry.cCylinders > 1024
811	\|\| LCHSGeometry.cHeads == 0
812	\|\| LCHSGeometry.cHeads > 255
813	\|\| LCHSGeometry.cSectors == 0
814	\|\| LCHSGeometry.cSectors > 63)
815	{
816	uint64_t cSectors = pHardDisk->pfnGetSize(pHardDisk) / 512;
817	if (cSectors / 16 / 63 <= 1024)
818	{
819	LCHSGeometry.cCylinders = RT_MAX(cSectors / 16 / 63, 1);
820	LCHSGeometry.cHeads = 16;
821	}
822	else if (cSectors / 32 / 63 <= 1024)
823	{
824	LCHSGeometry.cCylinders = RT_MAX(cSectors / 32 / 63, 1);
825	LCHSGeometry.cHeads = 32;
826	}
827	else if (cSectors / 64 / 63 <= 1024)
828	{
829	LCHSGeometry.cCylinders = cSectors / 64 / 63;
830	LCHSGeometry.cHeads = 64;
831	}
832	else if (cSectors / 128 / 63 <= 1024)
833	{
834	LCHSGeometry.cCylinders = cSectors / 128 / 63;
835	LCHSGeometry.cHeads = 128;
836	}
837	else
838	{
839	LCHSGeometry.cCylinders = RT_MIN(cSectors / 255 / 63, 1024);
840	LCHSGeometry.cHeads = 255;
841	}
842	LCHSGeometry.cSectors = 63;
843
844	}
845	rc = pHardDisk->pfnBiosSetLCHSGeometry(pHardDisk, &LCHSGeometry);
846	if (rc == VERR_VD_IMAGE_READ_ONLY)
847	{
848	LogRel(("PcBios: ATA failed to update LCHS geometry, read only\n"));
849	rc = VINF_SUCCESS;
850	}
851	else if (rc == VERR_PDM_GEOMETRY_NOT_SET)
852	{
853	LogRel(("PcBios: ATA failed to update LCHS geometry, backend refused\n"));
854	rc = VINF_SUCCESS;
855	}
856	}
857
858	*pLCHSGeometry = LCHSGeometry;
859
860	return rc;
861	}
862
863
864	/**
865	* Get logical CHS geometry for a hard disk, intended for SCSI/SAS drives
866	* with no physical geometry.
867	*
868	* @returns VBox status code.
869	* @param pHardDisk The hard disk.
870	* @param pLCHSGeometry Where to store the geometry settings.
871	*/
872	static int getLogicalDiskGeometry(PPDMIMEDIA pHardDisk, PPDMMEDIAGEOMETRY pLCHSGeometry)
873	{
874	PDMMEDIAGEOMETRY LCHSGeometry;
875	int rc = VINF_SUCCESS;
876
877	rc = pHardDisk->pfnBiosGetLCHSGeometry(pHardDisk, &LCHSGeometry);
878	if ( rc == VERR_PDM_GEOMETRY_NOT_SET
879	\|\| LCHSGeometry.cCylinders == 0
880	\|\| LCHSGeometry.cHeads == 0
881	\|\| LCHSGeometry.cHeads > 255
882	\|\| LCHSGeometry.cSectors == 0
883	\|\| LCHSGeometry.cSectors > 63)
884	{
885	/* Unlike the ATA case, if the image does not provide valid logical
886	* geometry, we leave things alone and let the BIOS decide what the
887	* logical geometry should be.
888	*/
889	rc = VERR_PDM_GEOMETRY_NOT_SET;
890	}
891	else
892	*pLCHSGeometry = LCHSGeometry;
893
894	return rc;
895	}
896
897
898	/**
899	* Get BIOS boot code from enmBootDevice in order
900	*
901	* @todo r=bird: This is a rather silly function since the conversion is 1:1.
902	*/
903	static uint8_t getBiosBootCode(PDEVPCBIOS pThis, unsigned iOrder)
904	{
905	switch (pThis->aenmBootDevice[iOrder])
906	{
907	case DEVPCBIOSBOOT_NONE:
908	return 0;
909	case DEVPCBIOSBOOT_FLOPPY:
910	return 1;
911	case DEVPCBIOSBOOT_HD:
912	return 2;
913	case DEVPCBIOSBOOT_DVD:
914	return 3;
915	case DEVPCBIOSBOOT_LAN:
916	return 4;
917	default:
918	AssertMsgFailed(("aenmBootDevice[%d]=%d\n", iOrder, pThis->aenmBootDevice[iOrder]));
919	return 0;
920	}
921	}
922
923
924	/**
925	* @interface_method_impl{PDMDEVREG,pfnInitComplete}
926	*
927	* This routine will write information needed by the bios to the CMOS.
928	*
929	* @see http://www.brl.ntt.co.jp/people/takehiko/interrupt/CMOS.LST.txt for
930	* a description of standard and non-standard CMOS registers.
931	*/
932	static DECLCALLBACK(int) pcbiosInitComplete(PPDMDEVINS pDevIns)
933	{
934	PDEVPCBIOS pThis = PDMDEVINS_2_DATA(pDevIns, PDEVPCBIOS);
935	uint32_t u32;
936	unsigned i;
937	PPDMIMEDIA apHDs[4] = {0};
938	LogFlow(("pcbiosInitComplete:\n"));
939
940	uint64_t const cbRamSize = PDMDevHlpMMPhysGetRamSize(pDevIns);
941	uint32_t const cbBelow4GB = PDMDevHlpMMPhysGetRamSizeBelow4GB(pDevIns);
942	uint64_t const cbAbove4GB = PDMDevHlpMMPhysGetRamSizeAbove4GB(pDevIns);
943
944	/*
945	* Memory sizes.
946	*/
947	/* base memory. */
948	u32 = cbRamSize > 640 ? 640 : (uint32_t)cbRamSize / _1K; /* <-- this test is wrong, but it doesn't matter since we never assign less than 1MB */
949	pcbiosCmosWrite(pDevIns, 0x15, RT_BYTE1(u32)); /* 15h - Base Memory in K, Low Byte */
950	pcbiosCmosWrite(pDevIns, 0x16, RT_BYTE2(u32)); /* 16h - Base Memory in K, High Byte */
951
952	/* Extended memory, up to 65MB */
953	u32 = cbRamSize >= 65 * _1M ? 0xffff : ((uint32_t)cbRamSize - _1M) / _1K;
954	pcbiosCmosWrite(pDevIns, 0x17, RT_BYTE1(u32)); /* 17h - Extended Memory in K, Low Byte */
955	pcbiosCmosWrite(pDevIns, 0x18, RT_BYTE2(u32)); /* 18h - Extended Memory in K, High Byte */
956	pcbiosCmosWrite(pDevIns, 0x30, RT_BYTE1(u32)); /* 30h - Extended Memory in K, Low Byte */
957	pcbiosCmosWrite(pDevIns, 0x31, RT_BYTE2(u32)); /* 31h - Extended Memory in K, High Byte */
958
959	/* Bochs BIOS specific? Anyway, it's the amount of memory above 16MB
960	and below 4GB (as it can only hold 4GB-16M). We have to chop off the
961	top 32MB or it conflict with what the ACPI tables return. (Should these
962	be adjusted, we still have to chop it at 0xfffc0000 or it'll conflict
963	with the high BIOS mapping.) */
964	if (cbRamSize > 16 * _1M)
965	u32 = (RT_MIN(cbBelow4GB, UINT32_C(0xfe000000)) - 16U * _1M) / _64K;
966	else
967	u32 = 0;
968	pcbiosCmosWrite(pDevIns, 0x34, RT_BYTE1(u32));
969	pcbiosCmosWrite(pDevIns, 0x35, RT_BYTE2(u32));
970
971	/* Bochs/VBox BIOS specific way of specifying memory above 4GB in 64KB units.
972	Bochs got these in a different location which we've already used for SATA,
973	it also lacks the last two. */
974	uint64_t c64KBAbove4GB = cbAbove4GB / _64K;
975	/* Make sure it doesn't hit the limits of the current BIOS code (RAM limit of ~255TB). */
976	AssertLogRelMsgReturn((c64KBAbove4GB >> (3 * 8)) < 255, ("%#RX64\n", c64KBAbove4GB), VERR_OUT_OF_RANGE);
977	pcbiosCmosWrite(pDevIns, 0x61, RT_BYTE1(c64KBAbove4GB));
978	pcbiosCmosWrite(pDevIns, 0x62, RT_BYTE2(c64KBAbove4GB));
979	pcbiosCmosWrite(pDevIns, 0x63, RT_BYTE3(c64KBAbove4GB));
980	pcbiosCmosWrite(pDevIns, 0x64, RT_BYTE4(c64KBAbove4GB));
981	pcbiosCmosWrite(pDevIns, 0x65, RT_BYTE5(c64KBAbove4GB));
982
983	/*
984	* Number of CPUs.
985	*/
986	pcbiosCmosWrite(pDevIns, 0x60, pThis->cCpus & 0xff);
987
988	/*
989	* APIC mode.
990	*/
991	pcbiosCmosWrite(pDevIns, 0x78, pThis->u8APICMode);
992
993	/*
994	* Bochs BIOS specifics - boot device.
995	* We do both new and old (ami-style) settings.
996	* See rombios.c line ~7215 (int19_function).
997	*/
998
999	uint8_t reg3d = getBiosBootCode(pThis, 0) \| (getBiosBootCode(pThis, 1) << 4);
1000	uint8_t reg38 = /* pcbiosCmosRead(pDevIns, 0x38) \| */ getBiosBootCode(pThis, 2) << 4;
1001	/* This is an extension. Bochs BIOS normally supports only 3 boot devices. */
1002	uint8_t reg3c = getBiosBootCode(pThis, 3) \| (pThis->uBootDelay << 4);
1003	pcbiosCmosWrite(pDevIns, 0x3d, reg3d);
1004	pcbiosCmosWrite(pDevIns, 0x38, reg38);
1005	pcbiosCmosWrite(pDevIns, 0x3c, reg3c);
1006
1007	/*
1008	* PXE debug option.
1009	*/
1010	pcbiosCmosWrite(pDevIns, 0x3f, pThis->u8PXEDebug);
1011
1012	/*
1013	* Network boot device list.
1014	*/
1015	for (i = 0; i < NET_BOOT_DEVS; ++i)
1016	{
1017	pcbiosCmosWrite(pDevIns, 0x82 + i * 2, RT_BYTE1(pThis->au16NetBootDev[i]));
1018	pcbiosCmosWrite(pDevIns, 0x83 + i * 2, RT_BYTE2(pThis->au16NetBootDev[i]));
1019	}
1020
1021	/*
1022	* Floppy drive type.
1023	*/
1024	uint32_t cFDs = 0;
1025	u32 = 0;
1026	for (i = 0; i < 2; i++)
1027	{
1028	PPDMIBASE pBase;
1029	int rc = PDMDevHlpQueryLun(pDevIns, pThis->pszFDDevice, 0, i, &pBase);
1030	if (RT_SUCCESS(rc))
1031	{
1032	PPDMIMEDIA pFD = PDMIBASE_QUERY_INTERFACE(pBase, PDMIMEDIA);
1033	if (pFD)
1034	{
1035	cFDs++;
1036	unsigned cShift = i == 0 ? 4 : 0;
1037	switch (pFD->pfnGetType(pFD))
1038	{
1039	case PDMMEDIATYPE_FLOPPY_360: u32 \|= 1 << cShift; break;
1040	case PDMMEDIATYPE_FLOPPY_1_20: u32 \|= 2 << cShift; break;
1041	case PDMMEDIATYPE_FLOPPY_720: u32 \|= 3 << cShift; break;
1042	case PDMMEDIATYPE_FLOPPY_1_44: u32 \|= 4 << cShift; break;
1043	case PDMMEDIATYPE_FLOPPY_2_88: u32 \|= 5 << cShift; break;
1044	case PDMMEDIATYPE_FLOPPY_FAKE_15_6: u32 \|= 14 << cShift; break;
1045	case PDMMEDIATYPE_FLOPPY_FAKE_63_5: u32 \|= 15 << cShift; break;
1046	default: AssertFailed(); break;
1047	}
1048	}
1049	}
1050	}
1051	pcbiosCmosWrite(pDevIns, 0x10, u32); /* 10h - Floppy Drive Type */
1052
1053	/*
1054	* Equipment byte.
1055	*/
1056	if (cFDs > 0)
1057	u32 = ((cFDs - 1) << 6) \| 0x01; /* floppy installed, additional drives. */
1058	else
1059	u32 = 0x00; /* floppy not installed. */
1060	u32 \|= RT_BIT(1); /* math coprocessor installed */
1061	u32 \|= RT_BIT(2); /* keyboard enabled (or mouse?) */
1062	u32 \|= RT_BIT(3); /* display enabled (monitory type is 0, i.e. vga) */
1063	pcbiosCmosWrite(pDevIns, 0x14, u32); /* 14h - Equipment Byte */
1064
1065	/*
1066	* IDE harddisks.
1067	*/
1068	for (i = 0; i < RT_ELEMENTS(apHDs); i++)
1069	{
1070	PPDMIBASE pBase;
1071	int rc = PDMDevHlpQueryLun(pDevIns, pThis->pszHDDevice, 0, i, &pBase);
1072	if (RT_SUCCESS(rc))
1073	apHDs[i] = PDMIBASE_QUERY_INTERFACE(pBase, PDMIMEDIA);
1074	if ( apHDs[i]
1075	&& ( apHDs[i]->pfnGetType(apHDs[i]) != PDMMEDIATYPE_HARD_DISK
1076	\|\| !apHDs[i]->pfnBiosIsVisible(apHDs[i])))
1077	apHDs[i] = NULL;
1078	if (apHDs[i])
1079	{
1080	PDMMEDIAGEOMETRY LCHSGeometry;
1081	int rc2 = setLogicalDiskGeometry(pBase, apHDs[i], &LCHSGeometry);
1082	AssertRC(rc2);
1083
1084	if (i < 4)
1085	{
1086	/* Award BIOS extended drive types for first to fourth disk.
1087	* Used by the BIOS for setting the logical geometry. */
1088	int offType, offInfo;
1089	switch (i)
1090	{
1091	case 0:
1092	offType = 0x19;
1093	offInfo = 0x1e;
1094	break;
1095	case 1:
1096	offType = 0x1a;
1097	offInfo = 0x26;
1098	break;
1099	case 2:
1100	offType = 0x00;
1101	offInfo = 0x67;
1102	break;
1103	case 3:
1104	default:
1105	offType = 0x00;
1106	offInfo = 0x70;
1107	break;
1108	}
1109	pcbiosCmosInitHardDisk(pDevIns, offType, offInfo, &LCHSGeometry);
1110	if (i < 2)
1111	pcbiosCmosTryPCATHardDisk(pDevIns, i, &LCHSGeometry);
1112	}
1113	LogRel(("PcBios: ATA LUN#%d LCHS=%u/%u/%u\n", i, LCHSGeometry.cCylinders, LCHSGeometry.cHeads, LCHSGeometry.cSectors));
1114	}
1115	}
1116
1117	/*
1118	* SATA harddisks.
1119	*/
1120	if (pThis->pszSataDevice)
1121	{
1122	/* Clear pointers to the block devices. */
1123	for (i = 0; i < RT_ELEMENTS(apHDs); i++)
1124	apHDs[i] = NULL;
1125
1126	for (i = 0; i < RT_ELEMENTS(apHDs); i++)
1127	{
1128	PPDMIBASE pBase;
1129	int rc = PDMDevHlpQueryLun(pDevIns, pThis->pszSataDevice, 0, pThis->iSataHDLUN[i], &pBase);
1130	if (RT_SUCCESS(rc))
1131	apHDs[i] = PDMIBASE_QUERY_INTERFACE(pBase, PDMIMEDIA);
1132	if ( apHDs[i]
1133	&& ( apHDs[i]->pfnGetType(apHDs[i]) != PDMMEDIATYPE_HARD_DISK
1134	\|\| !apHDs[i]->pfnBiosIsVisible(apHDs[i])))
1135	apHDs[i] = NULL;
1136	if (apHDs[i])
1137	{
1138	PDMMEDIAGEOMETRY LCHSGeometry;
1139	rc = setLogicalDiskGeometry(pBase, apHDs[i], &LCHSGeometry);
1140	AssertRC(rc);
1141
1142	if (i < 4)
1143	{
1144	/* Award BIOS extended drive types for first to fourth disk.
1145	* Used by the BIOS for setting the logical geometry. */
1146	int offInfo;
1147	switch (i)
1148	{
1149	case 0:
1150	offInfo = 0x40;
1151	break;
1152	case 1:
1153	offInfo = 0x48;
1154	break;
1155	case 2:
1156	offInfo = 0x50;
1157	break;
1158	case 3:
1159	default:
1160	offInfo = 0x58;
1161	break;
1162	}
1163	pcbiosCmosInitHardDisk(pDevIns, 0x00, offInfo,
1164	&LCHSGeometry);
1165	}
1166	LogRel(("PcBios: SATA LUN#%d LCHS=%u/%u/%u\n", i, LCHSGeometry.cCylinders, LCHSGeometry.cHeads, LCHSGeometry.cSectors));
1167	}
1168	}
1169	}
1170
1171	/*
1172	* SCSI harddisks. Not handled quite the same as SATA.
1173	*/
1174	if (pThis->pszScsiDevice)
1175	{
1176	/* Clear pointers to the block devices. */
1177	for (i = 0; i < RT_ELEMENTS(apHDs); i++)
1178	apHDs[i] = NULL;
1179
1180	for (i = 0; i < RT_ELEMENTS(apHDs); i++)
1181	{
1182	PPDMIBASE pBase;
1183	int rc = PDMDevHlpQueryLun(pDevIns, pThis->pszScsiDevice, 0, pThis->iScsiHDLUN[i], &pBase);
1184	if (RT_SUCCESS(rc))
1185	apHDs[i] = PDMIBASE_QUERY_INTERFACE(pBase, PDMIMEDIA);
1186	if ( apHDs[i]
1187	&& ( apHDs[i]->pfnGetType(apHDs[i]) != PDMMEDIATYPE_HARD_DISK
1188	\|\| !apHDs[i]->pfnBiosIsVisible(apHDs[i])))
1189	apHDs[i] = NULL;
1190	if (apHDs[i])
1191	{
1192	PDMMEDIAGEOMETRY LCHSGeometry;
1193	rc = getLogicalDiskGeometry(apHDs[i], &LCHSGeometry);
1194
1195	if (i < 4 && RT_SUCCESS(rc))
1196	{
1197	/* Extended drive information (for SCSI disks).
1198	* Used by the BIOS for setting the logical geometry, but
1199	* only if the image provided valid data.
1200	*/
1201	int offInfo;
1202	switch (i)
1203	{
1204	case 0:
1205	offInfo = 0x90;
1206	break;
1207	case 1:
1208	offInfo = 0x98;
1209	break;
1210	case 2:
1211	offInfo = 0xa0;
1212	break;
1213	case 3:
1214	default:
1215	offInfo = 0xa8;
1216	break;
1217	}
1218	pcbiosCmosInitHardDisk(pDevIns, 0x00, offInfo, &LCHSGeometry);
1219	LogRel(("PcBios: SCSI LUN#%d LCHS=%u/%u/%u\n", i, LCHSGeometry.cCylinders, LCHSGeometry.cHeads, LCHSGeometry.cSectors));
1220	}
1221	else
1222	LogRel(("PcBios: SCSI LUN#%d LCHS not provided\n", i));
1223	}
1224	}
1225	}
1226
1227	/* Calculate and store AT-style CMOS checksum. */
1228	uint16_t cksum = 0;
1229	for (i = 0x10; i < 0x2e; ++i)
1230	cksum += pcbiosCmosRead(pDevIns, i);
1231	pcbiosCmosWrite(pDevIns, 0x2e, RT_BYTE1(cksum));
1232	pcbiosCmosWrite(pDevIns, 0x2f, RT_BYTE2(cksum));
1233
1234	LogFlow(("%s: returns VINF_SUCCESS\n", __FUNCTION__));
1235	return VINF_SUCCESS;
1236	}
1237
1238
1239	/**
1240	* @interface_method_impl{PDMDEVREG,pfnMemSetup}
1241	*/
1242	static DECLCALLBACK(void) pcbiosMemSetup(PPDMDEVINS pDevIns, PDMDEVMEMSETUPCTX enmCtx)
1243	{
1244	RT_NOREF1(enmCtx);
1245	PDEVPCBIOS pThis = PDMDEVINS_2_DATA(pDevIns, PDEVPCBIOS);
1246	LogFlow(("pcbiosMemSetup:\n"));
1247
1248	if (pThis->u8IOAPIC)
1249	FwCommonPlantMpsFloatPtr(pDevIns, pThis->u32MPTableAddr);
1250
1251	/*
1252	* Re-shadow the LAN ROM image and make it RAM/RAM.
1253	*
1254	* This is normally done by the BIOS code, but since we're currently lacking
1255	* the chipset support for this we do it here (and in the constructor).
1256	*/
1257	uint32_t cPages = RT_ALIGN_64(pThis->cbLanBoot, GUEST_PAGE_SIZE) >> GUEST_PAGE_SHIFT;
1258	RTGCPHYS GCPhys = VBOX_LANBOOT_SEG << 4;
1259	while (cPages > 0)
1260	{
1261	uint8_t abPage[GUEST_PAGE_SIZE];
1262	int rc;
1263
1264	/* Read the (original) ROM page and write it back to the RAM page. */
1265	rc = PDMDevHlpROMProtectShadow(pDevIns, GCPhys, GUEST_PAGE_SIZE, PGMROMPROT_READ_ROM_WRITE_RAM);
1266	AssertLogRelRC(rc);
1267
1268	rc = PDMDevHlpPhysRead(pDevIns, GCPhys, abPage, GUEST_PAGE_SIZE);
1269	AssertLogRelRC(rc);
1270	if (RT_FAILURE(rc))
1271	memset(abPage, 0xcc, sizeof(abPage));
1272
1273	rc = PDMDevHlpPhysWrite(pDevIns, GCPhys, abPage, GUEST_PAGE_SIZE);
1274	AssertLogRelRC(rc);
1275
1276	/* Switch to the RAM/RAM mode. */
1277	rc = PDMDevHlpROMProtectShadow(pDevIns, GCPhys, GUEST_PAGE_SIZE, PGMROMPROT_READ_RAM_WRITE_RAM);
1278	AssertLogRelRC(rc);
1279
1280	/* Advance */
1281	GCPhys += GUEST_PAGE_SIZE;
1282	cPages--;
1283	}
1284	}
1285
1286
1287	/**
1288	* @interface_method_impl{PDMDEVREG,pfnDestruct}
1289	*/
1290	static DECLCALLBACK(int) pcbiosDestruct(PPDMDEVINS pDevIns)
1291	{
1292	PDMDEV_CHECK_VERSIONS_RETURN_QUIET(pDevIns);
1293	PDEVPCBIOS pThis = PDMDEVINS_2_DATA(pDevIns, PDEVPCBIOS);
1294	LogFlow(("pcbiosDestruct:\n"));
1295
1296	/*
1297	* Free MM heap pointers.
1298	*/
1299	if (pThis->pu8PcBios)
1300	{
1301	PDMDevHlpMMHeapFree(pDevIns, pThis->pu8PcBios);
1302	pThis->pu8PcBios = NULL;
1303	}
1304
1305	if (pThis->pszPcBiosFile)
1306	{
1307	PDMDevHlpMMHeapFree(pDevIns, pThis->pszPcBiosFile);
1308	pThis->pszPcBiosFile = NULL;
1309	}
1310
1311	if (pThis->pu8LanBoot)
1312	{
1313	PDMDevHlpMMHeapFree(pDevIns, pThis->pu8LanBoot);
1314	pThis->pu8LanBoot = NULL;
1315	}
1316
1317	if (pThis->pszLanBootFile)
1318	{
1319	PDMDevHlpMMHeapFree(pDevIns, pThis->pszLanBootFile);
1320	pThis->pszLanBootFile = NULL;
1321	}
1322
1323	if (pThis->pszHDDevice)
1324	{
1325	PDMDevHlpMMHeapFree(pDevIns, pThis->pszHDDevice);
1326	pThis->pszHDDevice = NULL;
1327	}
1328
1329	if (pThis->pszFDDevice)
1330	{
1331	PDMDevHlpMMHeapFree(pDevIns, pThis->pszFDDevice);
1332	pThis->pszFDDevice = NULL;
1333	}
1334
1335	if (pThis->pszSataDevice)
1336	{
1337	PDMDevHlpMMHeapFree(pDevIns, pThis->pszSataDevice);
1338	pThis->pszSataDevice = NULL;
1339	}
1340
1341	if (pThis->pszScsiDevice)
1342	{
1343	PDMDevHlpMMHeapFree(pDevIns, pThis->pszScsiDevice);
1344	pThis->pszScsiDevice = NULL;
1345	}
1346
1347	return VINF_SUCCESS;
1348	}
1349
1350
1351	/**
1352	* Convert config value to DEVPCBIOSBOOT.
1353	*
1354	* @returns VBox status code.
1355	* @param pDevIns Device instance data.
1356	* @param pCfg Configuration handle.
1357	* @param pszParam The name of the value to read.
1358	* @param penmBoot Where to store the boot method.
1359	*/
1360	static int pcbiosBootFromCfg(PPDMDEVINS pDevIns, PCFGMNODE pCfg, const char pszParam, DEVPCBIOSBOOT penmBoot)
1361	{
1362	PCPDMDEVHLPR3 pHlp = pDevIns->pHlpR3;
1363
1364	char szBuf[64];
1365	int rc = pHlp->pfnCFGMQueryString(pCfg, pszParam, szBuf, sizeof(szBuf));
1366	if (RT_FAILURE(rc))
1367	return PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
1368	N_("Configuration error: Querying \"%s\" as a string failed"), pszParam);
1369
1370	if (!strcmp(szBuf, "DVD") \|\| !strcmp(szBuf, "CDROM"))
1371	*penmBoot = DEVPCBIOSBOOT_DVD;
1372	else if (!strcmp(szBuf, "IDE"))
1373	*penmBoot = DEVPCBIOSBOOT_HD;
1374	else if (!strcmp(szBuf, "FLOPPY"))
1375	*penmBoot = DEVPCBIOSBOOT_FLOPPY;
1376	else if (!strcmp(szBuf, "LAN"))
1377	*penmBoot = DEVPCBIOSBOOT_LAN;
1378	else if (!strcmp(szBuf, "NONE"))
1379	*penmBoot = DEVPCBIOSBOOT_NONE;
1380	else
1381	rc = PDMDevHlpVMSetError(pDevIns, VERR_INVALID_PARAMETER, RT_SRC_POS,
1382	N_("Configuration error: The \"%s\" value \"%s\" is unknown"), pszParam, szBuf);
1383	return rc;
1384	}
1385
1386
1387	/**
1388	* @interface_method_impl{PDMDEVREG,pfnConstruct}
1389	*/
1390	static DECLCALLBACK(int) pcbiosConstruct(PPDMDEVINS pDevIns, int iInstance, PCFGMNODE pCfg)
1391	{
1392	PDMDEV_CHECK_VERSIONS_RETURN(pDevIns);
1393	PDEVPCBIOS pThis = PDMDEVINS_2_DATA(pDevIns, PDEVPCBIOS);
1394	PCPDMDEVHLPR3 pHlp = pDevIns->pHlpR3;
1395	int rc;
1396	int cb;
1397	Assert(iInstance == 0); RT_NOREF(iInstance);
1398
1399	/*
1400	* Validate configuration.
1401	*/
1402	PDMDEV_VALIDATE_CONFIG_RETURN(pDevIns,
1403	"BootDevice0"
1404	"\|BootDevice1"
1405	"\|BootDevice2"
1406	"\|BootDevice3"
1407	"\|HardDiskDevice"
1408	"\|SataHardDiskDevice"
1409	"\|SataLUN1"
1410	"\|SataLUN2"
1411	"\|SataLUN3"
1412	"\|SataLUN4"
1413	"\|ScsiHardDiskDevice"
1414	"\|ScsiLUN1"
1415	"\|ScsiLUN2"
1416	"\|ScsiLUN3"
1417	"\|ScsiLUN4"
1418	"\|FloppyDevice"
1419	"\|DelayBoot"
1420	"\|BiosRom"
1421	"\|LanBootRom"
1422	"\|PXEDebug"
1423	"\|UUID"
1424	"\|UuidLe"
1425	"\|IOAPIC"
1426	"\|APIC"
1427	"\|NumCPUs"
1428	"\|McfgBase"
1429	"\|McfgLength"
1430	"\|DmiBIOSFirmwareMajor"
1431	"\|DmiBIOSFirmwareMinor"
1432	"\|DmiBIOSReleaseDate"
1433	"\|DmiBIOSReleaseMajor"
1434	"\|DmiBIOSReleaseMinor"
1435	"\|DmiBIOSVendor"
1436	"\|DmiBIOSVersion"
1437	"\|DmiSystemFamily"
1438	"\|DmiSystemProduct"
1439	"\|DmiSystemSerial"
1440	"\|DmiSystemSKU"
1441	"\|DmiSystemUuid"
1442	"\|DmiSystemVendor"
1443	"\|DmiSystemVersion"
1444	"\|DmiBoardAssetTag"
1445	"\|DmiBoardBoardType"
1446	"\|DmiBoardLocInChass"
1447	"\|DmiBoardProduct"
1448	"\|DmiBoardSerial"
1449	"\|DmiBoardVendor"
1450	"\|DmiBoardVersion"
1451	"\|DmiChassisAssetTag"
1452	"\|DmiChassisSerial"
1453	"\|DmiChassisType"
1454	"\|DmiChassisVendor"
1455	"\|DmiChassisVersion"
1456	"\|DmiProcManufacturer"
1457	"\|DmiProcVersion"
1458	"\|DmiOEMVBoxVer"
1459	"\|DmiOEMVBoxRev"
1460	"\|DmiUseHostInfo"
1461	"\|DmiExposeMemoryTable"
1462	"\|DmiExposeProcInf"
1463	"\|CheckShutdownStatusForSoftReset"
1464	"\|ClearShutdownStatusOnHardReset"
1465	,
1466	"NetBoot");
1467	/*
1468	* Init the data.
1469	*/
1470	rc = pHlp->pfnCFGMQueryU16Def(pCfg, "NumCPUs", &pThis->cCpus, 1);
1471	if (RT_FAILURE(rc))
1472	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Querying \"NumCPUs\" as integer failed"));
1473
1474	rc = pHlp->pfnCFGMQueryU64Def(pCfg, "McfgBase", &pThis->u64McfgBase, 0);
1475	if (RT_FAILURE(rc))
1476	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Querying \"\" as integer failed"));
1477	rc = pHlp->pfnCFGMQueryU64Def(pCfg, "McfgLength", &pThis->cbMcfgLength, 0);
1478	if (RT_FAILURE(rc))
1479	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Querying \"McfgLength\" as integer failed"));
1480
1481
1482	LogRel(("PcBios: [SMP] BIOS with %u CPUs\n", pThis->cCpus));
1483
1484	rc = pHlp->pfnCFGMQueryU8Def(pCfg, "IOAPIC", &pThis->u8IOAPIC, 1);
1485	if (RT_FAILURE (rc))
1486	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Failed to read \"IOAPIC\""));
1487
1488	rc = pHlp->pfnCFGMQueryU8Def(pCfg, "APIC", &pThis->u8APICMode, 1);
1489	if (RT_FAILURE (rc))
1490	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Failed to read \"APIC\""));
1491
1492	static const char * const s_apszBootDevices[] = { "BootDevice0", "BootDevice1", "BootDevice2", "BootDevice3" };
1493	Assert(RT_ELEMENTS(s_apszBootDevices) == RT_ELEMENTS(pThis->aenmBootDevice));
1494	for (unsigned i = 0; i < RT_ELEMENTS(pThis->aenmBootDevice); i++)
1495	{
1496	rc = pcbiosBootFromCfg(pDevIns, pCfg, s_apszBootDevices[i], &pThis->aenmBootDevice[i]);
1497	if (RT_FAILURE(rc))
1498	return rc;
1499	}
1500
1501	rc = pHlp->pfnCFGMQueryStringAlloc(pCfg, "HardDiskDevice", &pThis->pszHDDevice);
1502	if (RT_FAILURE(rc))
1503	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Querying \"HardDiskDevice\" as a string failed"));
1504
1505	rc = pHlp->pfnCFGMQueryStringAlloc(pCfg, "FloppyDevice", &pThis->pszFDDevice);
1506	if (RT_FAILURE(rc))
1507	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Querying \"FloppyDevice\" as a string failed"));
1508
1509	rc = pHlp->pfnCFGMQueryStringAlloc(pCfg, "SataHardDiskDevice", &pThis->pszSataDevice);
1510	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
1511	pThis->pszSataDevice = NULL;
1512	else if (RT_FAILURE(rc))
1513	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Querying \"SataHardDiskDevice\" as a string failed"));
1514
1515	if (pThis->pszSataDevice)
1516	{
1517	static const char * const s_apszSataDisks[] = { "SataLUN1", "SataLUN2", "SataLUN3", "SataLUN4" };
1518	Assert(RT_ELEMENTS(s_apszSataDisks) == RT_ELEMENTS(pThis->iSataHDLUN));
1519	for (unsigned i = 0; i < RT_ELEMENTS(pThis->iSataHDLUN); i++)
1520	{
1521	rc = pHlp->pfnCFGMQueryU32(pCfg, s_apszSataDisks[i], &pThis->iSataHDLUN[i]);
1522	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
1523	pThis->iSataHDLUN[i] = i;
1524	else if (RT_FAILURE(rc))
1525	return PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
1526	N_("Configuration error: Querying \"%s\" as a string failed"), s_apszSataDisks);
1527	}
1528	}
1529
1530	/* Repeat the exercise for SCSI drives. */
1531	rc = pHlp->pfnCFGMQueryStringAlloc(pCfg, "ScsiHardDiskDevice", &pThis->pszScsiDevice);
1532	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
1533	pThis->pszScsiDevice = NULL;
1534	else if (RT_FAILURE(rc))
1535	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Querying \"ScsiHardDiskDevice\" as a string failed"));
1536
1537	if (pThis->pszScsiDevice)
1538	{
1539	static const char * const s_apszScsiDisks[] = { "ScsiLUN1", "ScsiLUN2", "ScsiLUN3", "ScsiLUN4" };
1540	Assert(RT_ELEMENTS(s_apszScsiDisks) == RT_ELEMENTS(pThis->iScsiHDLUN));
1541	for (unsigned i = 0; i < RT_ELEMENTS(pThis->iScsiHDLUN); i++)
1542	{
1543	rc = pHlp->pfnCFGMQueryU32(pCfg, s_apszScsiDisks[i], &pThis->iScsiHDLUN[i]);
1544	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
1545	pThis->iScsiHDLUN[i] = i;
1546	else if (RT_FAILURE(rc))
1547	return PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
1548	N_("Configuration error: Querying \"%s\" as a string failed"), s_apszScsiDisks);
1549	}
1550	}
1551
1552	/* PXE debug logging option. */
1553	rc = pHlp->pfnCFGMQueryU8Def(pCfg, "PXEDebug", &pThis->u8PXEDebug, false);
1554	if (RT_FAILURE(rc))
1555	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Querying \"PXEDebug\" as integer failed"));
1556
1557
1558	/*
1559	* Register the I/O Ports.
1560	*/
1561	IOMIOPORTHANDLE hIoPorts;
1562	rc = PDMDevHlpIoPortCreateAndMap(pDevIns, 0x400 /uPort/, 4 /cPorts/, pcbiosIOPortDebugWrite, pcbiosIOPortDebugRead,
1563	"Bochs PC BIOS - Panic & Debug", NULL, &hIoPorts);
1564	AssertRCReturn(rc, rc);
1565
1566	rc = PDMDevHlpIoPortCreateIsa(pDevIns, 1 /cPorts/, pcbiosIOPortControlWrite, pcbiosIOPortControlRead, NULL /pvUser/,
1567	"PC BIOS - Control", NULL /paExtDescs/, &pThis->hIoPortControl);
1568	AssertRCReturn(rc, rc);
1569	rc = pcbiosRegisterControl(pDevIns, pThis, true /* fNewControlPort */);
1570	AssertRCReturn(rc, rc);
1571
1572	/*
1573	* Register SSM handlers, for remembering which shutdown port to use.
1574	*/
1575	rc = PDMDevHlpSSMRegisterEx(pDevIns, PCBIOS_SSM_VERSION, 1 /* cbGuess */, NULL,
1576	NULL, NULL, NULL,
1577	NULL, pcbiosSaveExec, NULL,
1578	pcbiosLoadPrep, pcbiosLoadExec, pcbiosLoadDone);
1579
1580	/* Clear the net boot device list. All bits set invokes old behavior,
1581	* as if no second CMOS bank was present.
1582	*/
1583	memset(&pThis->au16NetBootDev, 0xff, sizeof(pThis->au16NetBootDev));
1584
1585	/*
1586	* Determine the network boot order.
1587	*/
1588	PCFGMNODE pCfgNetBoot = pHlp->pfnCFGMGetChild(pCfg, "NetBoot");
1589	if (pCfgNetBoot == NULL)
1590	{
1591	/* Do nothing. */
1592	rc = VINF_SUCCESS;
1593	}
1594	else
1595	{
1596	PCFGMNODE pCfgNetBootDevice;
1597	uint8_t u8PciBus;
1598	uint8_t u8PciDev;
1599	uint8_t u8PciFn;
1600	uint16_t u16BusDevFn;
1601	char szIndex[] = "?";
1602
1603	Assert(pCfgNetBoot);
1604	for (unsigned i = 0; i < NET_BOOT_DEVS; ++i)
1605	{
1606	szIndex[0] = '0' + i;
1607	pCfgNetBootDevice = pHlp->pfnCFGMGetChild(pCfgNetBoot, szIndex);
1608
1609	rc = pHlp->pfnCFGMQueryU8(pCfgNetBootDevice, "PCIBusNo", &u8PciBus);
1610	if (rc == VERR_CFGM_VALUE_NOT_FOUND \|\| rc == VERR_CFGM_NO_PARENT)
1611	{
1612	/* Do nothing and stop iterating. */
1613	rc = VINF_SUCCESS;
1614	break;
1615	}
1616	else if (RT_FAILURE(rc))
1617	return PDMDEV_SET_ERROR(pDevIns, rc,
1618	N_("Configuration error: Querying \"Netboot/x/PCIBusNo\" as integer failed"));
1619	rc = pHlp->pfnCFGMQueryU8(pCfgNetBootDevice, "PCIDeviceNo", &u8PciDev);
1620	if (rc == VERR_CFGM_VALUE_NOT_FOUND \|\| rc == VERR_CFGM_NO_PARENT)
1621	{
1622	/* Do nothing and stop iterating. */
1623	rc = VINF_SUCCESS;
1624	break;
1625	}
1626	else if (RT_FAILURE(rc))
1627	return PDMDEV_SET_ERROR(pDevIns, rc,
1628	N_("Configuration error: Querying \"Netboot/x/PCIDeviceNo\" as integer failed"));
1629	rc = pHlp->pfnCFGMQueryU8(pCfgNetBootDevice, "PCIFunctionNo", &u8PciFn);
1630	if (rc == VERR_CFGM_VALUE_NOT_FOUND \|\| rc == VERR_CFGM_NO_PARENT)
1631	{
1632	/* Do nothing and stop iterating. */
1633	rc = VINF_SUCCESS;
1634	break;
1635	}
1636	else if (RT_FAILURE(rc))
1637	return PDMDEV_SET_ERROR(pDevIns, rc,
1638	N_("Configuration error: Querying \"Netboot/x/PCIFunctionNo\" as integer failed"));
1639	u16BusDevFn = (((uint16_t)u8PciBus) << 8) \| ((u8PciDev & 0x1F) << 3) \| (u8PciFn & 0x7);
1640	pThis->au16NetBootDev[i] = u16BusDevFn;
1641	}
1642	}
1643
1644	/*
1645	* Get the system BIOS ROM file name.
1646	*/
1647	rc = pHlp->pfnCFGMQueryStringAlloc(pCfg, "BiosRom", &pThis->pszPcBiosFile);
1648	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
1649	{
1650	pThis->pszPcBiosFile = NULL;
1651	rc = VINF_SUCCESS;
1652	}
1653	else if (RT_FAILURE(rc))
1654	return PDMDEV_SET_ERROR(pDevIns, rc,
1655	N_("Configuration error: Querying \"BiosRom\" as a string failed"));
1656	else if (!*pThis->pszPcBiosFile)
1657	{
1658	PDMDevHlpMMHeapFree(pDevIns, pThis->pszPcBiosFile);
1659	pThis->pszPcBiosFile = NULL;
1660	}
1661
1662	/*
1663	* Get the CPU arch so we can load the appropriate ROMs.
1664	*/
1665	CPUMMICROARCH const enmMicroarch = PDMDevHlpCpuGetGuestMicroarch(pDevIns);
1666
1667	if (pThis->pszPcBiosFile)
1668	{
1669	/*
1670	* Load the BIOS ROM.
1671	*/
1672	RTFILE hFilePcBios;
1673	rc = RTFileOpen(&hFilePcBios, pThis->pszPcBiosFile,
1674	RTFILE_O_READ \| RTFILE_O_OPEN \| RTFILE_O_DENY_WRITE);
1675	if (RT_SUCCESS(rc))
1676	{
1677	/* Figure the size and check restrictions. */
1678	uint64_t cbPcBios;
1679	rc = RTFileQuerySize(hFilePcBios, &cbPcBios);
1680	if (RT_SUCCESS(rc))
1681	{
1682	pThis->cbPcBios = (uint32_t)cbPcBios;
1683	if ( RT_ALIGN(pThis->cbPcBios, _64K) == pThis->cbPcBios
1684	&& pThis->cbPcBios == cbPcBios
1685	&& pThis->cbPcBios <= 32 * _64K
1686	&& pThis->cbPcBios >= _64K)
1687	{
1688	pThis->pu8PcBios = (uint8_t *)PDMDevHlpMMHeapAlloc(pDevIns, pThis->cbPcBios);
1689	if (pThis->pu8PcBios)
1690	{
1691	rc = RTFileRead(hFilePcBios, pThis->pu8PcBios, pThis->cbPcBios, NULL);
1692	if (RT_FAILURE(rc))
1693	rc = PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
1694	N_("Error reading the BIOS image ('%s)"), pThis->pszPcBiosFile);
1695	}
1696	else
1697	rc = PDMDevHlpVMSetError(pDevIns, VERR_NO_MEMORY, RT_SRC_POS,
1698	N_("Failed to allocate %#x bytes for loading the BIOS image"),
1699	pThis->cbPcBios);
1700	}
1701	else
1702	rc = PDMDevHlpVMSetError(pDevIns, VERR_OUT_OF_RANGE, RT_SRC_POS,
1703	N_("Invalid system BIOS file size ('%s'): %#llx (%llu)"),
1704	pThis->pszPcBiosFile, cbPcBios, cbPcBios);
1705	}
1706	else
1707	rc = PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
1708	N_("Failed to query the system BIOS file size ('%s')"),
1709	pThis->pszPcBiosFile);
1710	RTFileClose(hFilePcBios);
1711	}
1712	else
1713	rc = PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
1714	N_("Failed to open system BIOS file '%s'"), pThis->pszPcBiosFile);
1715	if (RT_FAILURE(rc))
1716	return rc;
1717
1718	LogRel(("PcBios: Using BIOS ROM '%s' with a size of %#x bytes\n", pThis->pszPcBiosFile, pThis->cbPcBios));
1719	}
1720	else
1721	{
1722	/*
1723	* Use one of the embedded BIOS ROM images.
1724	*/
1725	uint8_t const *pbBios;
1726	uint32_t cbBios;
1727	if ( enmMicroarch == kCpumMicroarch_Intel_8086
1728	\|\| enmMicroarch == kCpumMicroarch_Intel_80186
1729	\|\| enmMicroarch == kCpumMicroarch_NEC_V20
1730	\|\| enmMicroarch == kCpumMicroarch_NEC_V30)
1731	{
1732	pbBios = g_abPcBiosBinary8086;
1733	cbBios = g_cbPcBiosBinary8086;
1734	LogRel(("PcBios: Using the 8086 BIOS image!\n"));
1735	}
1736	else if (enmMicroarch == kCpumMicroarch_Intel_80286)
1737	{
1738	pbBios = g_abPcBiosBinary286;
1739	cbBios = g_cbPcBiosBinary286;
1740	LogRel(("PcBios: Using the 286 BIOS image!\n"));
1741	}
1742	else
1743	{
1744	pbBios = g_abPcBiosBinary386;
1745	cbBios = g_cbPcBiosBinary386;
1746	LogRel(("PcBios: Using the 386+ BIOS image.\n"));
1747	}
1748	pThis->pu8PcBios = (uint8_t *)PDMDevHlpMMHeapAlloc(pDevIns, cbBios);
1749	if (pThis->pu8PcBios)
1750	{
1751	pThis->cbPcBios = cbBios;
1752	memcpy(pThis->pu8PcBios, pbBios, cbBios);
1753	}
1754	else
1755	return PDMDevHlpVMSetError(pDevIns, VERR_NO_MEMORY, RT_SRC_POS,
1756	N_("Failed to allocate %#x bytes for loading the embedded BIOS image"), cbBios);
1757	}
1758	const uint8_t *pu8PcBiosBinary = pThis->pu8PcBios;
1759	uint32_t cbPcBiosBinary = pThis->cbPcBios;
1760
1761	/*
1762	* Query the machine's UUID for SMBIOS/DMI use.
1763	*/
1764	RTUUID uuid;
1765	rc = pHlp->pfnCFGMQueryBytes(pCfg, "UUID", &uuid, sizeof(uuid));
1766	if (RT_FAILURE(rc))
1767	return PDMDEV_SET_ERROR(pDevIns, rc,
1768	N_("Configuration error: Querying \"UUID\" failed"));
1769
1770	bool fUuidLe;
1771	rc = pHlp->pfnCFGMQueryBoolDef(pCfg, "UuidLe", &fUuidLe, false);
1772	if (RT_FAILURE(rc))
1773	return PDMDEV_SET_ERROR(pDevIns, rc,
1774	N_("Configuration error: Querying \"UuidLe\" failed"));
1775
1776	if (!fUuidLe)
1777	{
1778	/*
1779	* UUIDs are stored little endian actually (see chapter 7.2.1 System — UUID
1780	* of the DMI/SMBIOS spec) but to not force reactivation of existing guests we have
1781	* to carry this bug along... (see also DevEFI.cpp when changing this)
1782	*
1783	* Convert the UUID to network byte order. Not entirely straightforward as
1784	* parts are MSB already...
1785	*/
1786	uuid.Gen.u32TimeLow = RT_H2BE_U32(uuid.Gen.u32TimeLow);
1787	uuid.Gen.u16TimeMid = RT_H2BE_U16(uuid.Gen.u16TimeMid);
1788	uuid.Gen.u16TimeHiAndVersion = RT_H2BE_U16(uuid.Gen.u16TimeHiAndVersion);
1789	}
1790
1791	uint16_t cbDmiTables = 0;
1792	uint16_t cDmiTables = 0;
1793	rc = FwCommonPlantDMITable(pDevIns, pThis->au8DMIPage, VBOX_DMI_TABLE_SIZE,
1794	&uuid, pCfg, pThis->cCpus, &cbDmiTables, &cDmiTables,
1795	false /fUefi/);
1796	if (RT_FAILURE(rc))
1797	return rc;
1798
1799	/* Look for _SM_/_DMI_ anchor strings within the BIOS and replace the table headers. */
1800	unsigned offAnchor = ~0U;
1801	unsigned const cbToSearch = pThis->cbPcBios - 32;
1802	for (unsigned off = 0; off <= cbToSearch; off += 16)
1803	{
1804	if ( pThis->pu8PcBios[off + 0x00] != '_'
1805	\|\| pThis->pu8PcBios[off + 0x01] != 'S'
1806	\|\| pThis->pu8PcBios[off + 0x02] != 'M'
1807	\|\| pThis->pu8PcBios[off + 0x03] != '_'
1808	\|\| pThis->pu8PcBios[off + 0x10] != '_'
1809	\|\| pThis->pu8PcBios[off + 0x11] != 'D'
1810	\|\| pThis->pu8PcBios[off + 0x12] != 'M'
1811	\|\| pThis->pu8PcBios[off + 0x13] != 'I'
1812	\|\| pThis->pu8PcBios[off + 0x14] != '_')
1813	{ /* likely */ }
1814	else
1815	{
1816	offAnchor = off;
1817	FwCommonPlantSmbiosAndDmiHdrs(pDevIns, pThis->pu8PcBios + off, cbDmiTables, cDmiTables);
1818	break;
1819	}
1820	}
1821	AssertLogRel(offAnchor <= cbToSearch);
1822
1823	if (pThis->u8IOAPIC)
1824	{
1825	pThis->u32MPTableAddr = VBOX_DMI_TABLE_BASE + VBOX_DMI_TABLE_SIZE;
1826	FwCommonPlantMpsTable(pDevIns, pThis->au8DMIPage /* aka VBOX_DMI_TABLE_BASE */ + VBOX_DMI_TABLE_SIZE,
1827	_4K - VBOX_DMI_TABLE_SIZE, pThis->cCpus);
1828	LogRel(("PcBios: MPS table at %08x\n", pThis->u32MPTableAddr));
1829	}
1830
1831	rc = PDMDevHlpROMRegister(pDevIns, VBOX_DMI_TABLE_BASE, _4K, pThis->au8DMIPage, _4K,
1832	PGMPHYS_ROM_FLAGS_PERMANENT_BINARY, "DMI tables");
1833	if (RT_FAILURE(rc))
1834	return rc;
1835
1836	/*
1837	* Map the BIOS into memory.
1838	* There are two mappings:
1839	* 1. 0x000e0000 to 0x000fffff contains the last 128 kb of the bios.
1840	* The bios code might be 64 kb in size, and will then start at 0xf0000.
1841	* 2. 0xfffxxxxx to 0xffffffff contains the entire bios.
1842	*/
1843	AssertReleaseMsg(cbPcBiosBinary >= _64K, ("cbPcBiosBinary=%#x\n", cbPcBiosBinary));
1844	AssertReleaseMsg(RT_ALIGN_Z(cbPcBiosBinary, _64K) == cbPcBiosBinary,
1845	("cbPcBiosBinary=%#x\n", cbPcBiosBinary));
1846	cb = RT_MIN(cbPcBiosBinary, 128 * _1K); /* Effectively either 64 or 128K. */
1847	rc = PDMDevHlpROMRegister(pDevIns, 0x00100000 - cb, cb, &pu8PcBiosBinary[cbPcBiosBinary - cb], cb,
1848	PGMPHYS_ROM_FLAGS_PERMANENT_BINARY, "PC BIOS - 0xfffff");
1849	if (RT_FAILURE(rc))
1850	return rc;
1851	rc = PDMDevHlpROMRegister(pDevIns, (uint32_t)-(int32_t)cbPcBiosBinary, cbPcBiosBinary, pu8PcBiosBinary, cbPcBiosBinary,
1852	PGMPHYS_ROM_FLAGS_PERMANENT_BINARY, "PC BIOS - 0xffffffff");
1853	if (RT_FAILURE(rc))
1854	return rc;
1855
1856	/*
1857	* Get the LAN boot ROM file name.
1858	*/
1859	rc = pHlp->pfnCFGMQueryStringAlloc(pCfg, "LanBootRom", &pThis->pszLanBootFile);
1860	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
1861	{
1862	pThis->pszLanBootFile = NULL;
1863	rc = VINF_SUCCESS;
1864	}
1865	else if (RT_FAILURE(rc))
1866	return PDMDEV_SET_ERROR(pDevIns, rc,
1867	N_("Configuration error: Querying \"LanBootRom\" as a string failed"));
1868	else if (!*pThis->pszLanBootFile)
1869	{
1870	PDMDevHlpMMHeapFree(pDevIns, pThis->pszLanBootFile);
1871	pThis->pszLanBootFile = NULL;
1872	}
1873
1874	/*
1875	* Not loading LAN ROM for old CPUs.
1876	*/
1877	if ( enmMicroarch != kCpumMicroarch_Intel_8086
1878	&& enmMicroarch != kCpumMicroarch_Intel_80186
1879	&& enmMicroarch != kCpumMicroarch_NEC_V20
1880	&& enmMicroarch != kCpumMicroarch_NEC_V30
1881	&& enmMicroarch != kCpumMicroarch_Intel_80286)
1882	{
1883	const uint8_t *pu8LanBootBinary = NULL;
1884	uint64_t cbLanBootBinary;
1885	uint64_t cbFileLanBoot = 0;
1886
1887	/*
1888	* Open the LAN boot ROM and figure it size.
1889	* Determine the LAN boot ROM size, open specified ROM file in the process.
1890	*/
1891	if (pThis->pszLanBootFile)
1892	{
1893	RTFILE hFileLanBoot = NIL_RTFILE;
1894	rc = RTFileOpen(&hFileLanBoot, pThis->pszLanBootFile,
1895	RTFILE_O_READ \| RTFILE_O_OPEN \| RTFILE_O_DENY_WRITE);
1896	if (RT_SUCCESS(rc))
1897	{
1898	rc = RTFileQuerySize(hFileLanBoot, &cbFileLanBoot);
1899	if (RT_SUCCESS(rc))
1900	{
1901	if (cbFileLanBoot <= _64K - (VBOX_LANBOOT_SEG << 4 & 0xffff))
1902	{
1903	LogRel(("PcBios: Using LAN ROM '%s' with a size of %#x bytes\n", pThis->pszLanBootFile, cbFileLanBoot));
1904
1905	/*
1906	* Allocate buffer for the LAN boot ROM data and load it.
1907	*/
1908	pThis->pu8LanBoot = (uint8_t *)PDMDevHlpMMHeapAllocZ(pDevIns, cbFileLanBoot);
1909	if (pThis->pu8LanBoot)
1910	{
1911	rc = RTFileRead(hFileLanBoot, pThis->pu8LanBoot, cbFileLanBoot, NULL);
1912	AssertLogRelRCReturnStmt(rc, RTFileClose(hFileLanBoot), rc);
1913	}
1914	else
1915	rc = VERR_NO_MEMORY;
1916	}
1917	else
1918	rc = VERR_TOO_MUCH_DATA;
1919	}
1920	RTFileClose(hFileLanBoot);
1921	}
1922	if (RT_FAILURE(rc))
1923	{
1924	/*
1925	* Play stupid and ignore failures, falling back to the built-in LAN boot ROM.
1926	*/
1927	/** @todo r=bird: This should have some kind of rational. We don't usually
1928	* ignore the VM configuration. */
1929	LogRel(("PcBios: Failed to open LAN boot ROM file '%s', rc=%Rrc!\n", pThis->pszLanBootFile, rc));
1930	PDMDevHlpMMHeapFree(pDevIns, pThis->pszLanBootFile);
1931	pThis->pszLanBootFile = NULL;
1932	}
1933	}
1934
1935	/* If we were unable to get the data from file for whatever reason, fall
1936	* back to the built-in LAN boot ROM image.
1937	*/
1938	if (pThis->pu8LanBoot == NULL)
1939	{
1940	#ifdef VBOX_WITH_PXE_ROM
1941	pu8LanBootBinary = g_abNetBiosBinary;
1942	cbLanBootBinary = g_cbNetBiosBinary;
1943	#endif
1944	}
1945	else
1946	{
1947	pu8LanBootBinary = pThis->pu8LanBoot;
1948	cbLanBootBinary = cbFileLanBoot;
1949	}
1950
1951	/*
1952	* Map the Network Boot ROM into memory.
1953	*
1954	* Currently there is a fixed mapping: 0x000e2000 to 0x000effff contains
1955	* the (up to) 56 kb ROM image. The mapping size is fixed to trouble with
1956	* the saved state (in PGM).
1957	*/
1958	if (pu8LanBootBinary)
1959	{
1960	pThis->cbLanBoot = cbLanBootBinary;
1961
1962	rc = PDMDevHlpROMRegister(pDevIns, VBOX_LANBOOT_SEG << 4,
1963	RT_MAX(cbLanBootBinary, _64K - (VBOX_LANBOOT_SEG << 4 & 0xffff)),
1964	pu8LanBootBinary, cbLanBootBinary,
1965	PGMPHYS_ROM_FLAGS_SHADOWED, "Net Boot ROM");
1966	AssertRCReturn(rc, rc);
1967	}
1968	}
1969	else if (pThis->pszLanBootFile)
1970	LogRel(("PcBios: Skipping LAN ROM '%s' due to ancient target CPU.\n", pThis->pszLanBootFile));
1971	#ifdef VBOX_WITH_PXE_ROM
1972	else
1973	LogRel(("PcBios: Skipping built in ROM due to ancient target CPU.\n"));
1974	#endif
1975
1976	/*
1977	* Configure Boot delay.
1978	*/
1979	rc = pHlp->pfnCFGMQueryU8Def(pCfg, "DelayBoot", &pThis->uBootDelay, 0);
1980	if (RT_FAILURE(rc))
1981	return PDMDEV_SET_ERROR(pDevIns, rc,
1982	N_("Configuration error: Querying \"DelayBoot\" as integer failed"));
1983	if (pThis->uBootDelay > 15)
1984	pThis->uBootDelay = 15;
1985
1986
1987	/*
1988	* Read shutdown status code config and register ourselves as the firmware device.
1989	*/
1990
1991	/** @cfgm{CheckShutdownStatusForSoftReset, boolean, true}
1992	* Whether to consult the shutdown status code (CMOS register 0Fh) to
1993	* determine whether the guest intended a soft or hard reset. Currently only
1994	* shutdown status codes 05h, 09h and 0Ah are considered soft reset. */
1995	rc = pHlp->pfnCFGMQueryBoolDef(pCfg, "CheckShutdownStatusForSoftReset", &pThis->fCheckShutdownStatusForSoftReset, true);
1996	AssertLogRelRCReturn(rc, rc);
1997
1998	/** @cfgm{ClearShutdownStatusOnHardReset, boolean, true}
1999	* Whether to clear the shutdown status code (CMOS register 0Fh) on hard reset. */
2000	rc = pHlp->pfnCFGMQueryBoolDef(pCfg, "ClearShutdownStatusOnHardReset", &pThis->fClearShutdownStatusOnHardReset, true);
2001	AssertLogRelRCReturn(rc, rc);
2002
2003	LogRel(("PcBios: fCheckShutdownStatusForSoftReset=%RTbool fClearShutdownStatusOnHardReset=%RTbool\n",
2004	pThis->fCheckShutdownStatusForSoftReset, pThis->fClearShutdownStatusOnHardReset));
2005
2006	static PDMFWREG const s_FwReg = { PDM_FWREG_VERSION, pcbiosFw_IsHardReset, PDM_FWREG_VERSION };
2007	rc = PDMDevHlpFirmwareRegister(pDevIns, &s_FwReg, &pThis->pFwHlpR3);
2008	AssertLogRelRCReturn(rc, rc);
2009
2010	return VINF_SUCCESS;
2011	}
2012
2013
2014	/**
2015	* The device registration structure.
2016	*/
2017	const PDMDEVREG g_DevicePcBios =
2018	{
2019	/* .u32Version = */ PDM_DEVREG_VERSION,
2020	/* .uReserved0 = */ 0,
2021	/* .szName = */ "pcbios",
2022	/* .fFlags = */ PDM_DEVREG_FLAGS_DEFAULT_BITS \| PDM_DEVREG_FLAGS_NEW_STYLE,
2023	/* .fClass = */ PDM_DEVREG_CLASS_ARCH_BIOS,
2024	/* .cMaxInstances = */ 1,
2025	/* .uSharedVersion = */ 42,
2026	/* .cbInstanceShared = */ sizeof(DEVPCBIOS),
2027	/* .cbInstanceCC = */ 0,
2028	/* .cbInstanceRC = */ 0,
2029	/* .cMaxPciDevices = */ 0,
2030	/* .cMaxMsixVectors = */ 0,
2031	/* .pszDescription = */ "PC BIOS Device",
2032	#if defined(IN_RING3)
2033	/* .pszRCMod = */ "",
2034	/* .pszR0Mod = */ "",
2035	/* .pfnConstruct = */ pcbiosConstruct,
2036	/* .pfnDestruct = */ pcbiosDestruct,
2037	/* .pfnRelocate = */ NULL,
2038	/* .pfnMemSetup = */ pcbiosMemSetup,
2039	/* .pfnPowerOn = */ NULL,
2040	/* .pfnReset = */ pcbiosReset,
2041	/* .pfnSuspend = */ NULL,
2042	/* .pfnResume = */ NULL,
2043	/* .pfnAttach = */ NULL,
2044	/* .pfnDetach = */ NULL,
2045	/* .pfnQueryInterface = */ NULL,
2046	/* .pfnInitComplete = */ pcbiosInitComplete,
2047	/* .pfnPowerOff = */ NULL,
2048	/* .pfnSoftReset = */ NULL,
2049	/* .pfnReserved0 = */ NULL,
2050	/* .pfnReserved1 = */ NULL,
2051	/* .pfnReserved2 = */ NULL,
2052	/* .pfnReserved3 = */ NULL,
2053	/* .pfnReserved4 = */ NULL,
2054	/* .pfnReserved5 = */ NULL,
2055	/* .pfnReserved6 = */ NULL,
2056	/* .pfnReserved7 = */ NULL,
2057	#elif defined(IN_RING0)
2058	/* .pfnEarlyConstruct = */ NULL,
2059	/* .pfnConstruct = */ NULL,
2060	/* .pfnDestruct = */ NULL,
2061	/* .pfnFinalDestruct = */ NULL,
2062	/* .pfnRequest = */ NULL,
2063	/* .pfnReserved0 = */ NULL,
2064	/* .pfnReserved1 = */ NULL,
2065	/* .pfnReserved2 = */ NULL,
2066	/* .pfnReserved3 = */ NULL,
2067	/* .pfnReserved4 = */ NULL,
2068	/* .pfnReserved5 = */ NULL,
2069	/* .pfnReserved6 = */ NULL,
2070	/* .pfnReserved7 = */ NULL,
2071	#elif defined(IN_RC)
2072	/* .pfnConstruct = */ NULL,
2073	/* .pfnReserved0 = */ NULL,
2074	/* .pfnReserved1 = */ NULL,
2075	/* .pfnReserved2 = */ NULL,
2076	/* .pfnReserved3 = */ NULL,
2077	/* .pfnReserved4 = */ NULL,
2078	/* .pfnReserved5 = */ NULL,
2079	/* .pfnReserved6 = */ NULL,
2080	/* .pfnReserved7 = */ NULL,
2081	#else
2082	# error "Not in IN_RING3, IN_RING0 or IN_RC!"
2083	#endif
2084	/* .u32VersionEnd = */ PDM_DEVREG_VERSION
2085	};
2086

Note: See TracBrowser for help on using the repository browser.

source: vbox/trunk/src/VBox/Devices/PC/DevPcBios.cpp@ 100836

Download in other formats: