1 // 16bit code to access hard drives.
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2002 MandrakeSoft S.A.
6 // This file may be distributed under the terms of the GNU GPLv3 license.
8 #include "disk.h" // floppy_13
9 #include "biosvar.h" // struct bregs
10 #include "config.h" // CONFIG_*
11 #include "cmos.h" // inb_cmos
12 #include "util.h" // debug_enter
13 #include "ata.h" // ATA_*
16 /****************************************************************
18 ****************************************************************/
20 #define DISK_STUB(regs) do { \
21 struct bregs *__regs = (regs); \
23 disk_ret(__regs, DISK_RET_SUCCESS); \
27 checksum_seg(u16 seg, u16 offset, u32 len)
32 sum += GET_FARVAR(seg, *(u8*)(offset+i));
37 basic_access(struct bregs *regs, u8 device, u16 command)
40 u16 cylinder = regs->ch | ((((u16) regs->cl) << 2) & 0x300);
41 u16 sector = regs->cl & 0x3f;
44 if ((count > 128) || (count == 0) || (sector == 0)) {
45 BX_INFO("int13_harddisk: function %02x, parameter out of range!\n"
47 disk_ret(regs, DISK_RET_EPARAM);
51 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
52 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
53 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
54 u16 nph = GET_EBDA(ata.devices[device].pchs.heads);
55 u16 npspt = GET_EBDA(ata.devices[device].pchs.spt);
57 // sanity check on cyl heads, sec
58 if ( (cylinder >= nlc) || (head >= nlh) || (sector > nlspt )) {
59 BX_INFO("int13_harddisk: function %02x, parameters out of"
60 " range %04x/%04x/%04x!\n"
61 , regs->ah, cylinder, head, sector);
62 disk_ret(regs, DISK_RET_EPARAM);
67 // if needed, translate lchs to lba, and execute command
68 if ( (nph != nlh) || (npspt != nlspt)) {
69 lba = (((((u32)cylinder * (u32)nlh) + (u32)head) * (u32)nlspt)
71 sector = 0; // this forces the command to be lba
74 u16 segment = regs->es;
75 u16 offset = regs->bx;
79 case ATA_CMD_READ_SECTORS:
80 status = ata_cmd_data_in(device, ATA_CMD_READ_SECTORS
81 , count, cylinder, head, sector
82 , lba, segment, offset);
84 case ATA_CMD_WRITE_SECTORS:
85 status = ata_cmd_data_out(device, ATA_CMD_WRITE_SECTORS
86 , count, cylinder, head, sector
87 , lba, segment, offset);
90 disk_ret(regs, DISK_RET_SUCCESS);
94 // Set nb of sector transferred
95 regs->al = GET_EBDA(ata.trsfsectors);
98 BX_INFO("int13_harddisk: function %02x, error %02x !\n",regs->ah,status);
99 disk_ret(regs, DISK_RET_EBADTRACK);
101 disk_ret(regs, DISK_RET_SUCCESS);
105 emu_access(struct bregs *regs, u8 device, u16 command)
107 u16 count = regs->al;
108 u16 cylinder = regs->ch | ((((u16) regs->cl) << 2) & 0x300);
109 u16 sector = regs->cl & 0x3f;
112 if ((count > 128) || (count == 0) || (sector == 0)) {
113 BX_INFO("int13_harddisk: function %02x, parameter out of range!\n"
115 disk_ret(regs, DISK_RET_EPARAM);
119 u16 nlc = GET_EBDA(cdemu.vdevice.cylinders);
120 u16 nlh = GET_EBDA(cdemu.vdevice.heads);
121 u16 nlspt = GET_EBDA(cdemu.vdevice.spt);
123 // sanity check on cyl heads, sec
124 if ( (cylinder >= nlc) || (head >= nlh) || (sector > nlspt )) {
125 BX_INFO("int13_harddisk: function %02x, parameters out of"
126 " range %04x/%04x/%04x!\n"
127 , regs->ah, cylinder, head, sector);
128 disk_ret(regs, DISK_RET_EPARAM);
134 disk_ret(regs, DISK_RET_SUCCESS);
138 u32 ilba = GET_EBDA(cdemu.ilba);
139 // calculate the virtual lba inside the image
140 u32 vlba= (((((u32)cylinder*(u32)nlh)+(u32)head)*(u32)nlspt)
143 u32 slba = (u32)vlba/4;
144 u16 before= (u16)vlba%4;
145 u32 lba = ilba + slba;
147 u16 segment = regs->es;
148 u16 offset = regs->bx;
150 u8 status = cdrom_read(device, lba, count*512, segment, offset, before*512);
152 BX_INFO("int13_harddisk: function %02x, error %02x !\n",regs->ah,status);
154 disk_ret(regs, DISK_RET_EBADTRACK);
157 disk_ret(regs, DISK_RET_SUCCESS);
161 extended_access(struct bregs *regs, u8 device, u16 command)
163 u16 count = GET_INT13EXT(regs, count);
164 u16 segment = GET_INT13EXT(regs, segment);
165 u16 offset = GET_INT13EXT(regs, offset);
167 // Can't use 64 bits lba
168 u32 lba = GET_INT13EXT(regs, lba2);
170 BX_PANIC("int13_harddisk: function %02x. Can't use 64bits lba\n"
172 disk_ret(regs, DISK_RET_EPARAM);
176 u8 type = GET_EBDA(ata.devices[device].type);
178 // Get 32 bits lba and check
179 lba = GET_INT13EXT(regs, lba1);
180 if (type == ATA_TYPE_ATA
181 && lba >= GET_EBDA(ata.devices[device].sectors)) {
182 BX_INFO("int13_harddisk: function %02x. LBA out of range\n", regs->ah);
183 disk_ret(regs, DISK_RET_EPARAM);
189 case ATA_CMD_READ_SECTORS:
190 if (type == ATA_TYPE_ATA)
191 status = ata_cmd_data_in(device, ATA_CMD_READ_SECTORS
193 , lba, segment, offset);
195 status = cdrom_read(device, lba, count*2048, segment, offset, 0);
197 case ATA_CMD_WRITE_SECTORS:
198 status = ata_cmd_data_out(device, ATA_CMD_WRITE_SECTORS
200 , lba, segment, offset);
204 disk_ret(regs, DISK_RET_SUCCESS);
208 SET_INT13EXT(regs, count, GET_EBDA(ata.trsfsectors));
211 BX_INFO("int13_harddisk: function %02x, error %02x !\n"
213 disk_ret(regs, DISK_RET_EBADTRACK);
216 disk_ret(regs, DISK_RET_SUCCESS);
220 /****************************************************************
221 * Hard Drive functions
222 ****************************************************************/
224 // disk controller reset
226 disk_1300(struct bregs *regs, u8 device)
233 disk_1301(struct bregs *regs, u8 device)
235 regs->ah = GET_BDA(disk_last_status);
236 disk_ret(regs, DISK_RET_SUCCESS);
241 disk_1302(struct bregs *regs, u8 device)
243 basic_access(regs, device, ATA_CMD_READ_SECTORS);
246 // write disk sectors
248 disk_1303(struct bregs *regs, u8 device)
250 basic_access(regs, device, ATA_CMD_WRITE_SECTORS);
253 // verify disk sectors
255 disk_1304(struct bregs *regs, u8 device)
257 basic_access(regs, device, 0);
263 disk_1305(struct bregs *regs, u8 device)
268 // read disk drive parameters
270 disk_1308(struct bregs *regs, u8 device)
272 // Get logical geometry from table
273 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
274 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
275 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
276 u16 count = GET_EBDA(ata.hdcount);
278 nlc = nlc - 2; /* 0 based , last sector not used */
280 regs->ch = nlc & 0xff;
281 regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f);
283 regs->dl = count; /* FIXME returns 0, 1, or n hard drives */
285 // FIXME should set ES & DI
286 disk_ret(regs, DISK_RET_SUCCESS);
289 // initialize drive parameters
291 disk_1309(struct bregs *regs, u8 device)
296 // seek to specified cylinder
298 disk_130c(struct bregs *regs, u8 device)
303 // alternate disk reset
305 disk_130d(struct bregs *regs, u8 device)
312 disk_1310(struct bregs *regs, u8 device)
314 // should look at 40:8E also???
316 // Read the status from controller
317 u8 status = inb(GET_EBDA(ata.channels[device/2].iobase1) + ATA_CB_STAT);
318 if ( (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY )
319 disk_ret(regs, DISK_RET_SUCCESS);
321 disk_ret(regs, DISK_RET_ENOTREADY);
326 disk_1311(struct bregs *regs, u8 device)
331 // controller internal diagnostic
333 disk_1314(struct bregs *regs, u8 device)
338 // read disk drive size
340 disk_1315(struct bregs *regs, u8 device)
342 // Get logical geometry from table
343 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
344 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
345 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
347 // Compute sector count seen by int13
348 u32 lba = (u32)(nlc - 1) * (u32)nlh * (u32)nlspt;
349 regs->cx = lba >> 16;
350 regs->dx = lba & 0xffff;
352 disk_ret(regs, DISK_RET_SUCCESS);
353 regs->ah = 3; // hard disk accessible
356 // IBM/MS installation check
358 disk_1341(struct bregs *regs, u8 device)
360 regs->bx = 0xaa55; // install check
361 regs->cx = 0x0007; // ext disk access and edd, removable supported
362 disk_ret(regs, DISK_RET_SUCCESS);
363 regs->ah = 0x30; // EDD 3.0
366 // IBM/MS extended read
368 disk_1342(struct bregs *regs, u8 device)
370 extended_access(regs, device, ATA_CMD_READ_SECTORS);
373 // IBM/MS extended write
375 disk_1343(struct bregs *regs, u8 device)
377 extended_access(regs, device, ATA_CMD_WRITE_SECTORS);
382 disk_1344(struct bregs *regs, u8 device)
384 extended_access(regs, device, 0);
387 // IBM/MS lock/unlock drive
389 disk_1345(struct bregs *regs, u8 device)
391 // Always success for HD
392 disk_ret(regs, DISK_RET_SUCCESS);
395 // IBM/MS eject media
397 disk_1346(struct bregs *regs, u8 device)
399 // Volume Not Removable
400 disk_ret(regs, DISK_RET_ENOTREMOVABLE);
403 // IBM/MS extended seek
405 disk_1347(struct bregs *regs, u8 device)
407 extended_access(regs, device, 0);
410 // IBM/MS get drive parameters
412 disk_1348(struct bregs *regs, u8 device)
414 u16 size = GET_INT13DPT(regs, size);
416 // Buffer is too small
418 disk_ret(regs, DISK_RET_EPARAM);
424 u8 type = GET_EBDA(ata.devices[device].type);
425 u16 npc = GET_EBDA(ata.devices[device].pchs.cylinders);
426 u16 nph = GET_EBDA(ata.devices[device].pchs.heads);
427 u16 npspt = GET_EBDA(ata.devices[device].pchs.spt);
428 u32 lba = GET_EBDA(ata.devices[device].sectors);
429 u16 blksize = GET_EBDA(ata.devices[device].blksize);
431 SET_INT13DPT(regs, size, 0x1a);
432 if (type == ATA_TYPE_ATA) {
433 if ((lba/npspt)/nph > 0x3fff) {
434 SET_INT13DPT(regs, infos, 0x00); // geometry is invalid
435 SET_INT13DPT(regs, cylinders, 0x3fff);
437 SET_INT13DPT(regs, infos, 0x02); // geometry is valid
438 SET_INT13DPT(regs, cylinders, (u32)npc);
440 SET_INT13DPT(regs, heads, (u32)nph);
441 SET_INT13DPT(regs, spt, (u32)npspt);
442 SET_INT13DPT(regs, sector_count1, lba); // FIXME should be Bit64
443 SET_INT13DPT(regs, sector_count2, 0L);
446 // 0x74 = removable, media change, lockable, max values
447 SET_INT13DPT(regs, infos, 0x74);
448 SET_INT13DPT(regs, cylinders, 0xffffffff);
449 SET_INT13DPT(regs, heads, 0xffffffff);
450 SET_INT13DPT(regs, spt, 0xffffffff);
451 SET_INT13DPT(regs, sector_count1, 0xffffffff); // FIXME should be Bit64
452 SET_INT13DPT(regs, sector_count2, 0xffffffff);
454 SET_INT13DPT(regs, blksize, blksize);
457 disk_ret(regs, DISK_RET_SUCCESS);
463 SET_INT13DPT(regs, size, 0x1e);
465 SET_INT13DPT(regs, dpte_segment, EBDA_SEG);
466 SET_INT13DPT(regs, dpte_offset
467 , offsetof(struct extended_bios_data_area_s, ata.dpte));
470 u8 channel = device / 2;
471 u16 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
472 u16 iobase2 = GET_EBDA(ata.channels[channel].iobase2);
473 u8 irq = GET_EBDA(ata.channels[channel].irq);
474 u8 mode = GET_EBDA(ata.devices[device].mode);
477 if (type == ATA_TYPE_ATA) {
478 u8 translation = GET_EBDA(ata.devices[device].translation);
479 options = (translation==ATA_TRANSLATION_NONE?0:1)<<3; // chs translation
480 options |= (translation==ATA_TRANSLATION_LBA?1:0)<<9;
481 options |= (translation==ATA_TRANSLATION_RECHS?3:0)<<9;
484 options = (1<<5); // removable device
485 options |= (1<<6); // atapi device
487 options |= (1<<4); // lba translation
488 options |= (mode==ATA_MODE_PIO32?1:0)<<7;
490 SET_EBDA(ata.dpte.iobase1, iobase1);
491 SET_EBDA(ata.dpte.iobase2, iobase2 + ATA_CB_DC);
492 SET_EBDA(ata.dpte.prefix, (0xe | (device % 2))<<4 );
493 SET_EBDA(ata.dpte.unused, 0xcb );
494 SET_EBDA(ata.dpte.irq, irq );
495 SET_EBDA(ata.dpte.blkcount, 1 );
496 SET_EBDA(ata.dpte.dma, 0 );
497 SET_EBDA(ata.dpte.pio, 0 );
498 SET_EBDA(ata.dpte.options, options);
499 SET_EBDA(ata.dpte.reserved, 0);
501 SET_EBDA(ata.dpte.revision, 0x11);
503 SET_EBDA(ata.dpte.revision, 0x10);
505 u8 sum = checksum_seg(EBDA_SEG
506 , offsetof(struct extended_bios_data_area_s, ata.dpte)
508 SET_EBDA(ata.dpte.checksum, ~sum);
511 disk_ret(regs, DISK_RET_SUCCESS);
516 channel = device / 2;
517 u8 iface = GET_EBDA(ata.channels[channel].iface);
518 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
520 SET_INT13DPT(regs, size, 0x42);
521 SET_INT13DPT(regs, key, 0xbedd);
522 SET_INT13DPT(regs, dpi_length, 0x24);
523 SET_INT13DPT(regs, reserved1, 0);
524 SET_INT13DPT(regs, reserved2, 0);
526 if (iface==ATA_IFACE_ISA) {
527 SET_INT13DPT(regs, host_bus[0], 'I');
528 SET_INT13DPT(regs, host_bus[1], 'S');
529 SET_INT13DPT(regs, host_bus[2], 'A');
530 SET_INT13DPT(regs, host_bus[3], 0);
534 SET_INT13DPT(regs, iface_type[0], 'A');
535 SET_INT13DPT(regs, iface_type[1], 'T');
536 SET_INT13DPT(regs, iface_type[2], 'A');
537 SET_INT13DPT(regs, iface_type[3], 0);
539 if (iface==ATA_IFACE_ISA) {
540 SET_INT13DPT(regs, iface_path[0], iobase1);
541 SET_INT13DPT(regs, iface_path[2], 0);
542 SET_INT13DPT(regs, iface_path[4], 0L);
546 SET_INT13DPT(regs, device_path[0], device%2);
547 SET_INT13DPT(regs, device_path[1], 0);
548 SET_INT13DPT(regs, device_path[2], 0);
549 SET_INT13DPT(regs, device_path[4], 0L);
551 sum = checksum_seg(regs->ds, 30, 34);
552 SET_INT13DPT(regs, checksum, ~sum);
555 // IBM/MS extended media change
557 disk_1349(struct bregs *regs, u8 device)
559 // Always success for HD
560 disk_ret(regs, DISK_RET_SUCCESS);
564 disk_134e01(struct bregs *regs, u8 device)
566 disk_ret(regs, DISK_RET_SUCCESS);
570 disk_134e03(struct bregs *regs, u8 device)
572 disk_ret(regs, DISK_RET_SUCCESS);
576 disk_134e04(struct bregs *regs, u8 device)
578 disk_ret(regs, DISK_RET_SUCCESS);
582 disk_134e06(struct bregs *regs, u8 device)
584 disk_ret(regs, DISK_RET_SUCCESS);
588 disk_134eXX(struct bregs *regs, u8 device)
591 disk_ret(regs, DISK_RET_EPARAM);
594 // IBM/MS set hardware configuration
596 disk_134e(struct bregs *regs, u8 device)
599 case 0x01: disk_134e01(regs, device); break;
600 case 0x03: disk_134e03(regs, device); break;
601 case 0x04: disk_134e04(regs, device); break;
602 case 0x06: disk_134e06(regs, device); break;
603 default: disk_134eXX(regs, device); break;
608 disk_13XX(struct bregs *regs, u8 device)
611 disk_ret(regs, DISK_RET_EPARAM);
615 disk_13(struct bregs *regs, u8 device)
619 // clear completion flag
620 SET_BDA(disk_interrupt_flag, 0);
623 case 0x00: disk_1300(regs, device); break;
624 case 0x01: disk_1301(regs, device); break;
625 case 0x02: disk_1302(regs, device); break;
626 case 0x03: disk_1303(regs, device); break;
627 case 0x04: disk_1304(regs, device); break;
628 case 0x05: disk_1305(regs, device); break;
629 case 0x08: disk_1308(regs, device); break;
630 case 0x09: disk_1309(regs, device); break;
631 case 0x0c: disk_130c(regs, device); break;
632 case 0x0d: disk_130d(regs, device); break;
633 case 0x10: disk_1310(regs, device); break;
634 case 0x11: disk_1311(regs, device); break;
635 case 0x14: disk_1314(regs, device); break;
636 case 0x15: disk_1315(regs, device); break;
637 case 0x41: disk_1341(regs, device); break;
638 case 0x42: disk_1342(regs, device); break;
639 case 0x43: disk_1343(regs, device); break;
640 case 0x44: disk_1344(regs, device); break;
641 case 0x45: disk_1345(regs, device); break;
642 case 0x46: disk_1346(regs, device); break;
643 case 0x47: disk_1347(regs, device); break;
644 case 0x48: disk_1348(regs, device); break;
645 case 0x49: disk_1349(regs, device); break;
646 case 0x4e: disk_134e(regs, device); break;
647 default: disk_13XX(regs, device); break;
652 /****************************************************************
654 ****************************************************************/
657 get_device(struct bregs *regs, u8 iscd, u8 drive)
659 // basic check : device has to be defined
660 if (drive >= CONFIG_MAX_ATA_DEVICES) {
661 disk_ret(regs, DISK_RET_EPARAM);
662 return CONFIG_MAX_ATA_DEVICES;
665 // Get the ata channel
666 u8 device = GET_EBDA(ata.idmap[iscd][drive]);
668 // basic check : device has to be valid
669 if (device >= CONFIG_MAX_ATA_DEVICES) {
670 disk_ret(regs, DISK_RET_EPARAM);
671 return CONFIG_MAX_ATA_DEVICES;
678 handle_legacy_disk(struct bregs *regs, u8 drive)
681 floppy_13(regs, drive);
686 // XXX - old code had other disk access method.
687 disk_ret(regs, DISK_RET_EPARAM);
692 u8 device = get_device(regs, 1, drive - 0xe0);
693 if (device >= CONFIG_MAX_ATA_DEVICES)
695 cdrom_13(regs, device);
699 u8 device = get_device(regs, 0, drive - 0x80);
700 if (device >= CONFIG_MAX_ATA_DEVICES)
702 disk_13(regs, device);
706 handle_40(struct bregs *regs)
709 handle_legacy_disk(regs, regs->dl);
712 // INT 13h Fixed Disk Services Entry Point
714 handle_13(struct bregs *regs)
719 if (CONFIG_CDROM_BOOT) {
720 if (regs->ah == 0x4b) {
724 if (GET_EBDA(cdemu.active)) {
725 if (drive == GET_EBDA(cdemu.emulated_drive)) {
733 handle_legacy_disk(regs, drive);
736 // record completion in BIOS task complete flag
738 handle_76(struct bregs *regs)
741 SET_BDA(floppy_harddisk_info, 0xff);