disk.c@ 47631

Last change on this file since 47631 was 44528, checked in by vboxsync, 12 years ago
header (C) fixes
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1	/*
2	* Copyright (C) 2006-2012 Oracle Corporation
3	*
4	* This file is part of VirtualBox Open Source Edition (OSE), as
5	* available from http://www.virtualbox.org. This file is free software;
6	* you can redistribute it and/or modify it under the terms of the GNU
7	* General Public License (GPL) as published by the Free Software
8	* Foundation, in version 2 as it comes in the "COPYING" file of the
9	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
10	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
11	* --------------------------------------------------------------------
12	*
13	* This code is based on:
14	*
15	* ROM BIOS for use with Bochs/Plex86/QEMU emulation environment
16	*
17	* Copyright (C) 2002 MandrakeSoft S.A.
18	*
19	* MandrakeSoft S.A.
20	* 43, rue d'Aboukir
21	* 75002 Paris - France
22	* http://www.linux-mandrake.com/
23	* http://www.mandrakesoft.com/
24	*
25	* This library is free software; you can redistribute it and/or
26	* modify it under the terms of the GNU Lesser General Public
27	* License as published by the Free Software Foundation; either
28	* version 2 of the License, or (at your option) any later version.
29	*
30	* This library is distributed in the hope that it will be useful,
31	* but WITHOUT ANY WARRANTY; without even the implied warranty of
32	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
33	* Lesser General Public License for more details.
34	*
35	* You should have received a copy of the GNU Lesser General Public
36	* License along with this library; if not, write to the Free Software
37	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
38	*
39	*/
40
41
42	#include <stdint.h>
43	#include "biosint.h"
44	#include "inlines.h"
45	#include "ebda.h"
46	#include "ata.h"
47
48
49	#if DEBUG_INT13_HD
50	# define BX_DEBUG_INT13_HD(...) BX_DEBUG(__VA_ARGS__)
51	#else
52	# define BX_DEBUG_INT13_HD(...)
53	#endif
54
55	/* Generic disk read/write routine signature. */
56	typedef __fastcall (* dsk_rw_func)(bio_dsk_t __far *bios_dsk);
57
58	/* Controller specific disk access routines. Declared as a union to reduce
59	* the need for conditionals when choosing between read/write functions.
60	* Note that we get away with using near pointers, which is nice.
61	*/
62	typedef union {
63	struct {
64	dsk_rw_func read;
65	dsk_rw_func write;
66	} s;
67	dsk_rw_func a[2];
68	} dsk_acc_t;
69
70	/* Pointers to HW specific disk access routines. */
71	dsk_acc_t dskacc[DSKTYP_CNT] = {
72	[DSK_TYPE_ATA] = { ata_read_sectors, ata_write_sectors },
73	#ifdef VBOX_WITH_AHCI
74	[DSK_TYPE_AHCI] = { ahci_read_sectors, ahci_write_sectors },
75	#endif
76	#ifdef VBOX_WITH_SCSI
77	[DSK_TYPE_SCSI] = { scsi_read_sectors, scsi_write_sectors },
78	#endif
79	};
80
81
82	//@todo: put in a header
83	#define AX r.gr.u.r16.ax
84	#define BX r.gr.u.r16.bx
85	#define CX r.gr.u.r16.cx
86	#define DX r.gr.u.r16.dx
87	#define SI r.gr.u.r16.si
88	#define DI r.gr.u.r16.di
89	#define BP r.gr.u.r16.bp
90	#define ELDX r.gr.u.r16.sp
91	#define DS r.ds
92	#define ES r.es
93	#define FLAGS r.ra.flags.u.r16.flags
94
95
96	/*
97	* Build translated CHS geometry given a disk size in sectors. Based on
98	* Phoenix EDD 3.0. This is used as a fallback to generate sane logical
99	* geometry in case none was provided in CMOS.
100	*/
101	void set_geom_lba(chs_t __far *lgeo, uint32_t nsectors)
102	{
103	uint32_t limit = 8257536; /* 1024 * 128 * 63 */
104	unsigned heads = 255;
105	int i;
106
107	/* Start with ~4GB limit, go down to 504MB. */
108	for (i = 0; i < 4; ++i) {
109	if (nsectors <= limit)
110	heads = (heads + 1) / 2;
111	limit /= 2;
112	}
113
114	lgeo->cylinders = nsectors / (heads * 63UL);
115	if (lgeo->cylinders > 1024)
116	lgeo->cylinders = 1024;
117	lgeo->heads = heads;
118	lgeo->spt = 63; /* Always 63 sectors per track, the maximum. */
119	}
120
121
122	void BIOSCALL int13_harddisk(disk_regs_t r)
123	{
124	uint32_t lba;
125	uint16_t cylinder, head, sector;
126	uint16_t nlc, nlh, nlspt;
127	uint16_t count;
128	uint8_t device, status;
129	bio_dsk_t __far *bios_dsk;
130
131	BX_DEBUG_INT13_HD("%s: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", __func__, AX, BX, CX, DX, ES);
132
133	bios_dsk = read_word(0x0040,0x000E) :> &EbdaData->bdisk;
134	write_byte(0x0040, 0x008e, 0); // clear completion flag
135
136	// basic check : device has to be defined
137	if ( (GET_ELDL() < 0x80) \|\| (GET_ELDL() >= 0x80 + BX_MAX_STORAGE_DEVICES) ) {
138	BX_DEBUG("%s: function %02x, ELDL out of range %02x\n", __func__, GET_AH(), GET_ELDL());
139	goto int13_fail;
140	}
141
142	// Get the ata channel
143	device = bios_dsk->hdidmap[GET_ELDL()-0x80];
144
145	// basic check : device has to be valid
146	if (device >= BX_MAX_STORAGE_DEVICES) {
147	BX_DEBUG("%s: function %02x, unmapped device for ELDL=%02x\n", __func__, GET_AH(), GET_ELDL());
148	goto int13_fail;
149	}
150
151	switch (GET_AH()) {
152
153	case 0x00: /* disk controller reset */
154	#ifdef VBOX_WITH_SCSI
155	/* SCSI controller does not need a reset. */
156	if (!VBOX_IS_SCSI_DEVICE(device))
157	#endif
158	ata_reset (device);
159	goto int13_success;
160	break;
161
162	case 0x01: /* read disk status */
163	status = read_byte(0x0040, 0x0074);
164	SET_AH(status);
165	SET_DISK_RET_STATUS(0);
166	/* set CF if error status read */
167	if (status) goto int13_fail_nostatus;
168	else goto int13_success_noah;
169	break;
170
171	case 0x02: // read disk sectors
172	case 0x03: // write disk sectors
173	case 0x04: // verify disk sectors
174
175	count = GET_AL();
176	cylinder = GET_CH();
177	cylinder \|= ( ((uint16_t) GET_CL()) << 2) & 0x300;
178	sector = (GET_CL() & 0x3f);
179	head = GET_DH();
180
181	/* Segment and offset are in ES:BX. */
182	if ( (count > 128) \|\| (count == 0) ) {
183	BX_INFO("%s: function %02x, count out of range!\n", __func__, GET_AH());
184	goto int13_fail;
185	}
186
187	/* Get the logical CHS geometry. */
188	nlc = bios_dsk->devices[device].lchs.cylinders;
189	nlh = bios_dsk->devices[device].lchs.heads;
190	nlspt = bios_dsk->devices[device].lchs.spt;
191
192	/* Sanity check the geometry. */
193	if( (cylinder >= nlc) \|\| (head >= nlh) \|\| (sector > nlspt )) {
194	BX_INFO("%s: function %02x, disk %02x, parameters out of range %04x/%04x/%04x!\n", __func__, GET_AH(), GET_DL(), cylinder, head, sector);
195	goto int13_fail;
196	}
197
198	// FIXME verify
199	if ( GET_AH() == 0x04 )
200	goto int13_success;
201
202	/* If required, translate LCHS to LBA and execute command. */
203	//@todo: The IS_SCSI_DEVICE check should be redundant...
204	if (( (bios_dsk->devices[device].pchs.heads != nlh) \|\| (bios_dsk->devices[device].pchs.spt != nlspt)) \|\| VBOX_IS_SCSI_DEVICE(device)) {
205	lba = ((((uint32_t)cylinder * (uint32_t)nlh) + (uint32_t)head) * (uint32_t)nlspt) + (uint32_t)sector - 1;
206	sector = 0; // this forces the command to be lba
207	}
208
209	/* Clear the count of transferred sectors/bytes. */
210	bios_dsk->drqp.trsfsectors = 0;
211	bios_dsk->drqp.trsfbytes = 0;
212
213	/* Pass request information to low level disk code. */
214	bios_dsk->drqp.lba = lba;
215	bios_dsk->drqp.buffer = MK_FP(ES, BX);
216	bios_dsk->drqp.nsect = count;
217	bios_dsk->drqp.sect_sz = 512; //@todo: device specific?
218	bios_dsk->drqp.cylinder = cylinder;
219	bios_dsk->drqp.head = head;
220	bios_dsk->drqp.sector = sector;
221	bios_dsk->drqp.dev_id = device;
222
223	status = dskacc[bios_dsk->devices[device].type].a[GET_AH() - 0x02](bios_dsk);
224
225	// Set nb of sector transferred
226	SET_AL(bios_dsk->drqp.trsfsectors);
227
228	if (status != 0) {
229	BX_INFO("%s: function %02x, error %02x !\n", __func__, GET_AH(), status);
230	SET_AH(0x0c);
231	goto int13_fail_noah;
232	}
233
234	goto int13_success;
235	break;
236
237	case 0x05: /* format disk track */
238	BX_INFO("format disk track called\n");
239	goto int13_success;
240	return;
241	break;
242
243	case 0x08: /* read disk drive parameters */
244
245	/* Get the logical geometry from internal table. */
246	nlc = bios_dsk->devices[device].lchs.cylinders;
247	nlh = bios_dsk->devices[device].lchs.heads;
248	nlspt = bios_dsk->devices[device].lchs.spt;
249
250	count = bios_dsk->hdcount;
251	/* Maximum cylinder number is just one less than the number of cylinders. */
252	nlc = nlc - 1; /* 0 based , last sector not used */
253	SET_AL(0);
254	SET_CH(nlc & 0xff);
255	SET_CL(((nlc >> 2) & 0xc0) \| (nlspt & 0x3f));
256	SET_DH(nlh - 1);
257	SET_DL(count); /* FIXME returns 0, 1, or n hard drives */
258
259	// FIXME should set ES & DI
260	// @todo: Actually, the above comment is nonsense.
261
262	goto int13_success;
263	break;
264
265	case 0x10: /* check drive ready */
266	// should look at 40:8E also???
267
268	// Read the status from controller
269	status = inb(bios_dsk->channels[device/2].iobase1 + ATA_CB_STAT);
270	if ( (status & ( ATA_CB_STAT_BSY \| ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY ) {
271	goto int13_success;
272	} else {
273	SET_AH(0xAA);
274	goto int13_fail_noah;
275	}
276	break;
277
278	case 0x15: /* read disk drive size */
279
280	/* Get the physical geometry from internal table. */
281	cylinder = bios_dsk->devices[device].pchs.cylinders;
282	head = bios_dsk->devices[device].pchs.heads;
283	sector = bios_dsk->devices[device].pchs.spt;
284
285	/* Calculate sector count seen by old style INT 13h. */
286	lba = (uint32_t)cylinder * head * sector;
287	CX = lba >> 16;
288	DX = lba & 0xffff;
289
290	SET_AH(3); // hard disk accessible
291	goto int13_success_noah;
292	break;
293
294	case 0x09: /* initialize drive parameters */
295	case 0x0c: /* seek to specified cylinder */
296	case 0x0d: /* alternate disk reset */
297	case 0x11: /* recalibrate */
298	case 0x14: /* controller internal diagnostic */
299	BX_INFO("%s: function %02xh unimplemented, returns success\n", __func__, GET_AH());
300	goto int13_success;
301	break;
302
303	case 0x0a: /* read disk sectors with ECC */
304	case 0x0b: /* write disk sectors with ECC */
305	case 0x18: // set media type for format
306	default:
307	BX_INFO("%s: function %02xh unsupported, returns fail\n", __func__, GET_AH());
308	goto int13_fail;
309	break;
310	}
311
312	int13_fail:
313	SET_AH(0x01); // defaults to invalid function in AH or invalid parameter
314	int13_fail_noah:
315	SET_DISK_RET_STATUS(GET_AH());
316	int13_fail_nostatus:
317	SET_CF(); // error occurred
318	return;
319
320	int13_success:
321	SET_AH(0x00); // no error
322	int13_success_noah:
323	SET_DISK_RET_STATUS(0x00);
324	CLEAR_CF(); // no error
325	return;
326	}
327
328	void BIOSCALL int13_harddisk_ext(disk_regs_t r)
329	{
330	uint32_t lba;
331	uint16_t ebda_seg = read_word(0x0040,0x000E);
332	uint16_t segment, offset;
333	uint16_t npc, nph, npspt;
334	uint16_t size, count;
335	uint8_t device, status;
336	uint8_t type;
337	bio_dsk_t __far *bios_dsk;
338	int13ext_t __far *i13_ext;
339	dpt_t __far *dpt;
340
341	bios_dsk = read_word(0x0040,0x000E) :> &EbdaData->bdisk;
342
343	BX_DEBUG_INT13_HD("%s: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", __func__, AX, BX, CX, DX, ES);
344
345	write_byte(0x0040, 0x008e, 0); // clear completion flag
346
347	// basic check : device has to be defined
348	if ( (GET_ELDL() < 0x80) \|\| (GET_ELDL() >= 0x80 + BX_MAX_STORAGE_DEVICES) ) {
349	BX_DEBUG("%s: function %02x, ELDL out of range %02x\n", __func__, GET_AH(), GET_ELDL());
350	goto int13x_fail;
351	}
352
353	// Get the ata channel
354	device = bios_dsk->hdidmap[GET_ELDL()-0x80];
355
356	// basic check : device has to be valid
357	if (device >= BX_MAX_STORAGE_DEVICES) {
358	BX_DEBUG("%s: function %02x, unmapped device for ELDL=%02x\n", __func__, GET_AH(), GET_ELDL());
359	goto int13x_fail;
360	}
361
362	switch (GET_AH()) {
363	case 0x41: // IBM/MS installation check
364	BX=0xaa55; // install check
365	SET_AH(0x30); // EDD 3.0
366	CX=0x0007; // ext disk access and edd, removable supported
367	goto int13x_success_noah;
368	break;
369
370	case 0x42: // IBM/MS extended read
371	case 0x43: // IBM/MS extended write
372	case 0x44: // IBM/MS verify
373	case 0x47: // IBM/MS extended seek
374
375	/* Get a pointer to the extended structure. */
376	i13_ext = DS :> (int13ext_t *)SI;
377
378	count = i13_ext->count;
379	segment = i13_ext->segment;
380	offset = i13_ext->offset;
381
382	BX_DEBUG_INT13_HD("%s: %d sectors from lba %u @ %04x:%04x\n", __func__,
383	count, i13_ext->lba1, segment, offset);
384
385	// Can't use 64 bits lba
386	lba = i13_ext->lba2;
387	if (lba != 0L) {
388	BX_PANIC("%s: function %02x. Can't use 64bits lba\n", __func__, GET_AH());
389	goto int13x_fail;
390	}
391
392	// Get 32 bits lba and check
393	lba = i13_ext->lba1;
394
395	type = bios_dsk->devices[device].type;
396	if (lba >= bios_dsk->devices[device].sectors) {
397	BX_INFO("%s: function %02x. LBA out of range\n", __func__, GET_AH());
398	goto int13x_fail;
399	}
400
401	/* Don't bother with seek or verify. */
402	if (( GET_AH() == 0x44 ) \|\| ( GET_AH() == 0x47 ))
403	goto int13x_success;
404
405	/* Clear the count of transferred sectors/bytes. */
406	bios_dsk->drqp.trsfsectors = 0;
407	bios_dsk->drqp.trsfbytes = 0;
408
409	/* Pass request information to low level disk code. */
410	bios_dsk->drqp.lba = lba;
411	bios_dsk->drqp.buffer = MK_FP(segment, offset);
412	bios_dsk->drqp.nsect = count;
413	bios_dsk->drqp.sect_sz = 512; //@todo: device specific?
414	bios_dsk->drqp.sector = 0; /* Indicate LBA. */
415	bios_dsk->drqp.dev_id = device;
416
417	/* Execute the read or write command. */
418	status = dskacc[type].a[GET_AH() - 0x42](bios_dsk);
419	count = bios_dsk->drqp.trsfsectors;
420	i13_ext->count = count;
421
422	if (status != 0) {
423	BX_INFO("%s: function %02x, error %02x !\n", __func__, GET_AH(), status);
424	SET_AH(0x0c);
425	goto int13x_fail_noah;
426	}
427
428	goto int13x_success;
429	break;
430
431	case 0x45: // IBM/MS lock/unlock drive
432	case 0x49: // IBM/MS extended media change
433	goto int13x_success; // Always success for HD
434	break;
435
436	case 0x46: // IBM/MS eject media
437	SET_AH(0xb2); // Volume Not Removable
438	goto int13x_fail_noah; // Always fail for HD
439	break;
440
441	case 0x48: // IBM/MS get drive parameters
442	dpt = DS :> (dpt_t *)SI;
443	size = dpt->size;
444
445	/* Check if buffer is large enough. */
446	if (size < 0x1a)
447	goto int13x_fail;
448
449	/* Fill in EDD 1.x table. */
450	if (size >= 0x1a) {
451	uint16_t blksize;
452
453	npc = bios_dsk->devices[device].pchs.cylinders;
454	nph = bios_dsk->devices[device].pchs.heads;
455	npspt = bios_dsk->devices[device].pchs.spt;
456	lba = bios_dsk->devices[device].sectors;
457	blksize = bios_dsk->devices[device].blksize;
458
459	dpt->size = 0x1a;
460	dpt->infos = 0x02; // geometry is valid
461	dpt->cylinders = npc;
462	dpt->heads = nph;
463	dpt->spt = npspt;
464	dpt->blksize = blksize;
465	dpt->sector_count1 = lba; // FIXME should be Bit64
466	dpt->sector_count2 = 0;
467	}
468
469	/* Fill in EDD 2.x table. */
470	if (size >= 0x1e) {
471	uint8_t channel, irq, mode, checksum, i, translation;
472	uint16_t iobase1, iobase2, options;
473
474	dpt->size = 0x1e;
475	dpt->dpte_segment = ebda_seg;
476	dpt->dpte_offset = (uint16_t)&EbdaData->bdisk.dpte;
477
478	// Fill in dpte
479	channel = device / 2;
480	iobase1 = bios_dsk->channels[channel].iobase1;
481	iobase2 = bios_dsk->channels[channel].iobase2;
482	irq = bios_dsk->channels[channel].irq;
483	mode = bios_dsk->devices[device].mode;
484	translation = bios_dsk->devices[device].translation;
485
486	options = (translation == GEO_TRANSLATION_NONE ? 0 : 1 << 3); // chs translation
487	options \|= (1 << 4); // lba translation
488	options \|= (mode == ATA_MODE_PIO32 ? 1 : 0 << 7);
489	options \|= (translation == GEO_TRANSLATION_LBA ? 1 : 0 << 9);
490	options \|= (translation == GEO_TRANSLATION_RECHS ? 3 : 0 << 9);
491
492	bios_dsk->dpte.iobase1 = iobase1;
493	bios_dsk->dpte.iobase2 = iobase2;
494	bios_dsk->dpte.prefix = (0xe \| (device % 2)) << 4;
495	bios_dsk->dpte.unused = 0xcb;
496	bios_dsk->dpte.irq = irq;
497	bios_dsk->dpte.blkcount = 1;
498	bios_dsk->dpte.dma = 0;
499	bios_dsk->dpte.pio = 0;
500	bios_dsk->dpte.options = options;
501	bios_dsk->dpte.reserved = 0;
502	bios_dsk->dpte.revision = 0x11;
503
504	checksum = 0;
505	for (i = 0; i < 15; ++i)
506	checksum += read_byte(ebda_seg, (uint16_t)&EbdaData->bdisk.dpte + i);
507	checksum = -checksum;
508	bios_dsk->dpte.checksum = checksum;
509	}
510
511	/* Fill in EDD 3.x table. */
512	if(size >= 0x42) {
513	uint8_t channel, iface, checksum, i;
514	uint16_t iobase1;
515
516	channel = device / 2;
517	iface = bios_dsk->channels[channel].iface;
518	iobase1 = bios_dsk->channels[channel].iobase1;
519
520	dpt->size = 0x42;
521	dpt->key = 0xbedd;
522	dpt->dpi_length = 0x24;
523	dpt->reserved1 = 0;
524	dpt->reserved2 = 0;
525
526	if (iface == ATA_IFACE_ISA) {
527	dpt->host_bus[0] = 'I';
528	dpt->host_bus[1] = 'S';
529	dpt->host_bus[2] = 'A';
530	dpt->host_bus[3] = ' ';
531	}
532	else {
533	// FIXME PCI
534	}
535	dpt->iface_type[0] = 'A';
536	dpt->iface_type[1] = 'T';
537	dpt->iface_type[2] = 'A';
538	dpt->iface_type[3] = ' ';
539	dpt->iface_type[4] = ' ';
540	dpt->iface_type[5] = ' ';
541	dpt->iface_type[6] = ' ';
542	dpt->iface_type[7] = ' ';
543
544	if (iface == ATA_IFACE_ISA) {
545	((uint16_t __far *)dpt->iface_path)[0] = iobase1;
546	((uint16_t __far *)dpt->iface_path)[1] = 0;
547	((uint32_t __far *)dpt->iface_path)[1] = 0;
548	}
549	else {
550	// FIXME PCI
551	}
552	((uint16_t __far *)dpt->device_path)[0] = device & 1; // device % 2; @todo: correct?
553	((uint16_t __far *)dpt->device_path)[1] = 0;
554	((uint32_t __far *)dpt->device_path)[1] = 0;
555
556	checksum = 0;
557	for (i = 30; i < 64; i++)
558	checksum += read_byte(DS, SI + i);
559	checksum = -checksum;
560	dpt->checksum = checksum;
561	}
562
563	goto int13x_success;
564	break;
565
566	case 0x4e: // // IBM/MS set hardware configuration
567	// DMA, prefetch, PIO maximum not supported
568	switch (GET_AL()) {
569	case 0x01:
570	case 0x03:
571	case 0x04:
572	case 0x06:
573	goto int13x_success;
574	break;
575	default :
576	goto int13x_fail;
577	}
578	break;
579
580	case 0x50: // IBM/MS send packet command
581	default:
582	BX_INFO("%s: function %02xh unsupported, returns fail\n", __func__, GET_AH());
583	goto int13x_fail;
584	break;
585	}
586
587	int13x_fail:
588	SET_AH(0x01); // defaults to invalid function in AH or invalid parameter
589	int13x_fail_noah:
590	SET_DISK_RET_STATUS(GET_AH());
591	SET_CF(); // error occurred
592	return;
593
594	int13x_success:
595	SET_AH(0x00); // no error
596	int13x_success_noah:
597	SET_DISK_RET_STATUS(0x00);
598	CLEAR_CF(); // no error
599	return;
600	}
601
602	/* Avoid saving general registers already saved by caller (PUSHA). */
603	#pragma aux int13_harddisk modify [di si cx dx bx];
604	#pragma aux int13_harddisk_ext modify [di si cx dx bx];
605

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source: vbox/trunk/src/VBox/Devices/PC/BIOS/disk.c@ 47631

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