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_*
15 #define DEBUGF1(fmt, args...) bprintf(0, fmt , ##args)
16 #define DEBUGF(fmt, args...)
19 /****************************************************************
21 ****************************************************************/
23 #define DISK_STUB(regs) do { \
24 struct bregs *__regs = (regs); \
26 disk_ret(__regs, DISK_RET_SUCCESS); \
30 checksum_seg(u16 seg, u16 offset, u32 len)
35 sum += GET_FARVAR(seg, *(u8*)(offset+i));
40 basic_access(struct bregs *regs, u8 device, u16 command)
43 u16 cylinder = regs->ch | ((((u16) regs->cl) << 2) & 0x300);
44 u16 sector = regs->cl & 0x3f;
47 if ((count > 128) || (count == 0) || (sector == 0)) {
48 BX_INFO("int13_harddisk: function %02x, parameter out of range!\n"
50 disk_ret(regs, DISK_RET_EPARAM);
54 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
55 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
56 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
57 u16 nph = GET_EBDA(ata.devices[device].pchs.heads);
58 u16 npspt = GET_EBDA(ata.devices[device].pchs.spt);
60 // sanity check on cyl heads, sec
61 if ( (cylinder >= nlc) || (head >= nlh) || (sector > nlspt )) {
62 BX_INFO("int13_harddisk: function %02x, parameters out of"
63 " range %04x/%04x/%04x!\n"
64 , regs->ah, cylinder, head, sector);
65 disk_ret(regs, DISK_RET_EPARAM);
70 // if needed, translate lchs to lba, and execute command
71 if ( (nph != nlh) || (npspt != nlspt)) {
72 lba = (((((u32)cylinder * (u32)nlh) + (u32)head) * (u32)nlspt)
74 sector = 0; // this forces the command to be lba
77 u16 segment = regs->es;
78 u16 offset = regs->bx;
82 case ATA_CMD_READ_SECTORS:
83 status = ata_cmd_data_in(device, ATA_CMD_READ_SECTORS
84 , count, cylinder, head, sector
85 , lba, segment, offset);
87 case ATA_CMD_WRITE_SECTORS:
88 status = ata_cmd_data_out(device, ATA_CMD_WRITE_SECTORS
89 , count, cylinder, head, sector
90 , lba, segment, offset);
93 disk_ret(regs, DISK_RET_SUCCESS);
97 // Set nb of sector transferred
98 regs->al = GET_EBDA(ata.trsfsectors);
101 BX_INFO("int13_harddisk: function %02x, error %02x !\n",regs->ah,status);
102 disk_ret(regs, DISK_RET_EBADTRACK);
104 disk_ret(regs, DISK_RET_SUCCESS);
108 emu_access(struct bregs *regs, u8 device, u16 command)
110 u16 count = regs->al;
111 u16 cylinder = regs->ch | ((((u16) regs->cl) << 2) & 0x300);
112 u16 sector = regs->cl & 0x3f;
115 if ((count > 128) || (count == 0) || (sector == 0)) {
116 BX_INFO("int13_harddisk: function %02x, parameter out of range!\n"
118 disk_ret(regs, DISK_RET_EPARAM);
122 u16 nlc = GET_EBDA(cdemu.vdevice.cylinders);
123 u16 nlh = GET_EBDA(cdemu.vdevice.heads);
124 u16 nlspt = GET_EBDA(cdemu.vdevice.spt);
126 // sanity check on cyl heads, sec
127 if ( (cylinder >= nlc) || (head >= nlh) || (sector > nlspt )) {
128 BX_INFO("int13_harddisk: function %02x, parameters out of"
129 " range %04x/%04x/%04x!\n"
130 , regs->ah, cylinder, head, sector);
131 disk_ret(regs, DISK_RET_EPARAM);
137 disk_ret(regs, DISK_RET_SUCCESS);
141 u32 ilba = GET_EBDA(cdemu.ilba);
142 // calculate the virtual lba inside the image
143 u32 vlba= (((((u32)cylinder*(u32)nlh)+(u32)head)*(u32)nlspt)
146 u32 slba = (u32)vlba/4;
147 u16 before= (u16)vlba%4;
148 u32 lba = ilba + slba;
150 u16 segment = regs->es;
151 u16 offset = regs->bx;
153 u8 status = cdrom_read(device, lba, count*512, segment, offset, before*512);
155 BX_INFO("int13_harddisk: function %02x, error %02x !\n",regs->ah,status);
157 disk_ret(regs, DISK_RET_EBADTRACK);
160 disk_ret(regs, DISK_RET_SUCCESS);
164 extended_access(struct bregs *regs, u8 device, u16 command)
166 u16 count = GET_INT13EXT(regs, count);
167 u16 segment = GET_INT13EXT(regs, segment);
168 u16 offset = GET_INT13EXT(regs, offset);
170 // Can't use 64 bits lba
171 u32 lba = GET_INT13EXT(regs, lba2);
173 BX_PANIC("int13_harddisk: function %02x. Can't use 64bits lba\n"
175 disk_ret(regs, DISK_RET_EPARAM);
179 u8 type = GET_EBDA(ata.devices[device].type);
181 // Get 32 bits lba and check
182 lba = GET_INT13EXT(regs, lba1);
183 if (type == ATA_TYPE_ATA
184 && lba >= GET_EBDA(ata.devices[device].sectors)) {
185 BX_INFO("int13_harddisk: function %02x. LBA out of range\n", regs->ah);
186 disk_ret(regs, DISK_RET_EPARAM);
192 case ATA_CMD_READ_SECTORS:
193 if (type == ATA_TYPE_ATA)
194 status = ata_cmd_data_in(device, ATA_CMD_READ_SECTORS
196 , lba, segment, offset);
198 status = cdrom_read(device, lba, count*2048, segment, offset, 0);
200 case ATA_CMD_WRITE_SECTORS:
201 status = ata_cmd_data_out(device, ATA_CMD_WRITE_SECTORS
203 , lba, segment, offset);
207 disk_ret(regs, DISK_RET_SUCCESS);
211 SET_INT13EXT(regs, count, GET_EBDA(ata.trsfsectors));
214 BX_INFO("int13_harddisk: function %02x, error %02x !\n"
216 disk_ret(regs, DISK_RET_EBADTRACK);
219 disk_ret(regs, DISK_RET_SUCCESS);
223 /****************************************************************
224 * Hard Drive functions
225 ****************************************************************/
227 // disk controller reset
229 disk_1300(struct bregs *regs, u8 device)
236 disk_1301(struct bregs *regs, u8 device)
238 regs->ah = GET_BDA(disk_last_status);
239 disk_ret(regs, DISK_RET_SUCCESS);
244 disk_1302(struct bregs *regs, u8 device)
246 basic_access(regs, device, ATA_CMD_READ_SECTORS);
249 // write disk sectors
251 disk_1303(struct bregs *regs, u8 device)
253 basic_access(regs, device, ATA_CMD_WRITE_SECTORS);
256 // verify disk sectors
258 disk_1304(struct bregs *regs, u8 device)
260 basic_access(regs, device, 0);
266 disk_1305(struct bregs *regs, u8 device)
271 // read disk drive parameters
273 disk_1308(struct bregs *regs, u8 device)
275 // Get logical geometry from table
276 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
277 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
278 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
279 u16 count = GET_EBDA(ata.hdcount);
281 nlc = nlc - 2; /* 0 based , last sector not used */
283 regs->ch = nlc & 0xff;
284 regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f);
286 regs->dl = count; /* FIXME returns 0, 1, or n hard drives */
288 // FIXME should set ES & DI
289 disk_ret(regs, DISK_RET_SUCCESS);
292 // initialize drive parameters
294 disk_1309(struct bregs *regs, u8 device)
299 // seek to specified cylinder
301 disk_130c(struct bregs *regs, u8 device)
306 // alternate disk reset
308 disk_130d(struct bregs *regs, u8 device)
315 disk_1310(struct bregs *regs, u8 device)
317 // should look at 40:8E also???
319 // Read the status from controller
320 u8 status = inb(GET_EBDA(ata.channels[device/2].iobase1) + ATA_CB_STAT);
321 if ( (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY )
322 disk_ret(regs, DISK_RET_SUCCESS);
324 disk_ret(regs, DISK_RET_ENOTREADY);
329 disk_1311(struct bregs *regs, u8 device)
334 // controller internal diagnostic
336 disk_1314(struct bregs *regs, u8 device)
341 // read disk drive size
343 disk_1315(struct bregs *regs, u8 device)
345 // Get logical geometry from table
346 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
347 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
348 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
350 // Compute sector count seen by int13
351 u32 lba = (u32)(nlc - 1) * (u32)nlh * (u32)nlspt;
352 regs->cx = lba >> 16;
353 regs->dx = lba & 0xffff;
355 disk_ret(regs, DISK_RET_SUCCESS);
356 regs->ah = 3; // hard disk accessible
359 // IBM/MS installation check
361 disk_1341(struct bregs *regs, u8 device)
363 regs->bx = 0xaa55; // install check
364 regs->cx = 0x0007; // ext disk access and edd, removable supported
365 disk_ret(regs, DISK_RET_SUCCESS);
366 regs->ah = 0x30; // EDD 3.0
369 // IBM/MS extended read
371 disk_1342(struct bregs *regs, u8 device)
373 extended_access(regs, device, ATA_CMD_READ_SECTORS);
376 // IBM/MS extended write
378 disk_1343(struct bregs *regs, u8 device)
380 extended_access(regs, device, ATA_CMD_WRITE_SECTORS);
385 disk_1344(struct bregs *regs, u8 device)
387 extended_access(regs, device, 0);
390 // IBM/MS lock/unlock drive
392 disk_1345(struct bregs *regs, u8 device)
394 // Always success for HD
395 disk_ret(regs, DISK_RET_SUCCESS);
398 // IBM/MS eject media
400 disk_1346(struct bregs *regs, u8 device)
402 // Volume Not Removable
403 disk_ret(regs, DISK_RET_ENOTREMOVABLE);
406 // IBM/MS extended seek
408 disk_1347(struct bregs *regs, u8 device)
410 extended_access(regs, device, 0);
413 // IBM/MS get drive parameters
415 disk_1348(struct bregs *regs, u8 device)
417 u16 size = GET_INT13DPT(regs, size);
419 // Buffer is too small
421 disk_ret(regs, DISK_RET_EPARAM);
427 u8 type = GET_EBDA(ata.devices[device].type);
428 u16 npc = GET_EBDA(ata.devices[device].pchs.cylinders);
429 u16 nph = GET_EBDA(ata.devices[device].pchs.heads);
430 u16 npspt = GET_EBDA(ata.devices[device].pchs.spt);
431 u32 lba = GET_EBDA(ata.devices[device].sectors);
432 u16 blksize = GET_EBDA(ata.devices[device].blksize);
434 SET_INT13DPT(regs, size, 0x1a);
435 if (type == ATA_TYPE_ATA) {
436 if ((lba/npspt)/nph > 0x3fff) {
437 SET_INT13DPT(regs, infos, 0x00); // geometry is invalid
438 SET_INT13DPT(regs, cylinders, 0x3fff);
440 SET_INT13DPT(regs, infos, 0x02); // geometry is valid
441 SET_INT13DPT(regs, cylinders, (u32)npc);
443 SET_INT13DPT(regs, heads, (u32)nph);
444 SET_INT13DPT(regs, spt, (u32)npspt);
445 SET_INT13DPT(regs, sector_count1, lba); // FIXME should be Bit64
446 SET_INT13DPT(regs, sector_count2, 0L);
449 // 0x74 = removable, media change, lockable, max values
450 SET_INT13DPT(regs, infos, 0x74);
451 SET_INT13DPT(regs, cylinders, 0xffffffff);
452 SET_INT13DPT(regs, heads, 0xffffffff);
453 SET_INT13DPT(regs, spt, 0xffffffff);
454 SET_INT13DPT(regs, sector_count1, 0xffffffff); // FIXME should be Bit64
455 SET_INT13DPT(regs, sector_count2, 0xffffffff);
457 SET_INT13DPT(regs, blksize, blksize);
460 disk_ret(regs, DISK_RET_SUCCESS);
466 SET_INT13DPT(regs, size, 0x1e);
468 SET_INT13DPT(regs, dpte_segment, EBDA_SEG);
469 SET_INT13DPT(regs, dpte_offset
470 , offsetof(struct extended_bios_data_area_s, ata.dpte));
473 u8 channel = device / 2;
474 u16 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
475 u16 iobase2 = GET_EBDA(ata.channels[channel].iobase2);
476 u8 irq = GET_EBDA(ata.channels[channel].irq);
477 u8 mode = GET_EBDA(ata.devices[device].mode);
480 if (type == ATA_TYPE_ATA) {
481 u8 translation = GET_EBDA(ata.devices[device].translation);
482 options = (translation==ATA_TRANSLATION_NONE?0:1)<<3; // chs translation
483 options |= (translation==ATA_TRANSLATION_LBA?1:0)<<9;
484 options |= (translation==ATA_TRANSLATION_RECHS?3:0)<<9;
487 options = (1<<5); // removable device
488 options |= (1<<6); // atapi device
490 options |= (1<<4); // lba translation
491 options |= (mode==ATA_MODE_PIO32?1:0)<<7;
493 SET_EBDA(ata.dpte.iobase1, iobase1);
494 SET_EBDA(ata.dpte.iobase2, iobase2 + ATA_CB_DC);
495 SET_EBDA(ata.dpte.prefix, (0xe | (device % 2))<<4 );
496 SET_EBDA(ata.dpte.unused, 0xcb );
497 SET_EBDA(ata.dpte.irq, irq );
498 SET_EBDA(ata.dpte.blkcount, 1 );
499 SET_EBDA(ata.dpte.dma, 0 );
500 SET_EBDA(ata.dpte.pio, 0 );
501 SET_EBDA(ata.dpte.options, options);
502 SET_EBDA(ata.dpte.reserved, 0);
504 SET_EBDA(ata.dpte.revision, 0x11);
506 SET_EBDA(ata.dpte.revision, 0x10);
508 u8 sum = checksum_seg(EBDA_SEG
509 , offsetof(struct extended_bios_data_area_s, ata.dpte)
511 SET_EBDA(ata.dpte.checksum, ~sum);
514 disk_ret(regs, DISK_RET_SUCCESS);
519 channel = device / 2;
520 u8 iface = GET_EBDA(ata.channels[channel].iface);
521 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
523 SET_INT13DPT(regs, size, 0x42);
524 SET_INT13DPT(regs, key, 0xbedd);
525 SET_INT13DPT(regs, dpi_length, 0x24);
526 SET_INT13DPT(regs, reserved1, 0);
527 SET_INT13DPT(regs, reserved2, 0);
529 if (iface==ATA_IFACE_ISA) {
530 SET_INT13DPT(regs, host_bus[0], 'I');
531 SET_INT13DPT(regs, host_bus[1], 'S');
532 SET_INT13DPT(regs, host_bus[2], 'A');
533 SET_INT13DPT(regs, host_bus[3], 0);
537 SET_INT13DPT(regs, iface_type[0], 'A');
538 SET_INT13DPT(regs, iface_type[1], 'T');
539 SET_INT13DPT(regs, iface_type[2], 'A');
540 SET_INT13DPT(regs, iface_type[3], 0);
542 if (iface==ATA_IFACE_ISA) {
543 SET_INT13DPT(regs, iface_path[0], iobase1);
544 SET_INT13DPT(regs, iface_path[2], 0);
545 SET_INT13DPT(regs, iface_path[4], 0L);
549 SET_INT13DPT(regs, device_path[0], device%2);
550 SET_INT13DPT(regs, device_path[1], 0);
551 SET_INT13DPT(regs, device_path[2], 0);
552 SET_INT13DPT(regs, device_path[4], 0L);
554 sum = checksum_seg(regs->ds, 30, 34);
555 SET_INT13DPT(regs, checksum, ~sum);
558 // IBM/MS extended media change
560 disk_1349(struct bregs *regs, u8 device)
562 // Always success for HD
563 disk_ret(regs, DISK_RET_SUCCESS);
567 disk_134e01(struct bregs *regs, u8 device)
569 disk_ret(regs, DISK_RET_SUCCESS);
573 disk_134e03(struct bregs *regs, u8 device)
575 disk_ret(regs, DISK_RET_SUCCESS);
579 disk_134e04(struct bregs *regs, u8 device)
581 disk_ret(regs, DISK_RET_SUCCESS);
585 disk_134e06(struct bregs *regs, u8 device)
587 disk_ret(regs, DISK_RET_SUCCESS);
591 disk_134eXX(struct bregs *regs, u8 device)
594 disk_ret(regs, DISK_RET_EPARAM);
597 // IBM/MS set hardware configuration
599 disk_134e(struct bregs *regs, u8 device)
602 case 0x01: disk_134e01(regs, device); break;
603 case 0x03: disk_134e03(regs, device); break;
604 case 0x04: disk_134e04(regs, device); break;
605 case 0x06: disk_134e06(regs, device); break;
606 default: disk_134eXX(regs, device); break;
611 disk_13XX(struct bregs *regs, u8 device)
614 disk_ret(regs, DISK_RET_EPARAM);
618 disk_13(struct bregs *regs, u8 device)
622 // clear completion flag
623 SET_BDA(disk_interrupt_flag, 0);
626 case 0x00: disk_1300(regs, device); break;
627 case 0x01: disk_1301(regs, device); break;
628 case 0x02: disk_1302(regs, device); break;
629 case 0x03: disk_1303(regs, device); break;
630 case 0x04: disk_1304(regs, device); break;
631 case 0x05: disk_1305(regs, device); break;
632 case 0x08: disk_1308(regs, device); break;
633 case 0x09: disk_1309(regs, device); break;
634 case 0x0c: disk_130c(regs, device); break;
635 case 0x0d: disk_130d(regs, device); break;
636 case 0x10: disk_1310(regs, device); break;
637 case 0x11: disk_1311(regs, device); break;
638 case 0x14: disk_1314(regs, device); break;
639 case 0x15: disk_1315(regs, device); break;
640 case 0x41: disk_1341(regs, device); break;
641 case 0x42: disk_1342(regs, device); break;
642 case 0x43: disk_1343(regs, device); break;
643 case 0x44: disk_1344(regs, device); break;
644 case 0x45: disk_1345(regs, device); break;
645 case 0x46: disk_1346(regs, device); break;
646 case 0x47: disk_1347(regs, device); break;
647 case 0x48: disk_1348(regs, device); break;
648 case 0x49: disk_1349(regs, device); break;
649 case 0x4e: disk_134e(regs, device); break;
650 default: disk_13XX(regs, device); break;
655 /****************************************************************
657 ****************************************************************/
660 get_device(struct bregs *regs, u8 iscd, u8 drive)
662 // basic check : device has to be defined
663 if (drive >= CONFIG_MAX_ATA_DEVICES) {
664 disk_ret(regs, DISK_RET_EPARAM);
665 return CONFIG_MAX_ATA_DEVICES;
668 // Get the ata channel
669 u8 device = GET_EBDA(ata.idmap[iscd][drive]);
671 // basic check : device has to be valid
672 if (device >= CONFIG_MAX_ATA_DEVICES) {
673 disk_ret(regs, DISK_RET_EPARAM);
674 return CONFIG_MAX_ATA_DEVICES;
681 handle_legacy_disk(struct bregs *regs, u8 drive)
684 floppy_13(regs, drive);
689 // XXX - old code had other disk access method.
690 disk_ret(regs, DISK_RET_EPARAM);
695 u8 device = get_device(regs, 1, drive - 0xe0);
696 if (device >= CONFIG_MAX_ATA_DEVICES)
698 cdrom_13(regs, device);
702 u8 device = get_device(regs, 0, drive - 0x80);
703 if (device >= CONFIG_MAX_ATA_DEVICES)
705 disk_13(regs, device);
709 handle_40(struct bregs *regs)
712 handle_legacy_disk(regs, regs->dl);
715 // INT 13h Fixed Disk Services Entry Point
717 handle_13(struct bregs *regs)
722 if (CONFIG_CDROM_BOOT) {
723 if (regs->ah == 0x4b) {
727 if (GET_EBDA(cdemu.active)) {
728 if (drive == GET_EBDA(cdemu.emulated_drive)) {
736 handle_legacy_disk(regs, drive);
739 // record completion in BIOS task complete flag
741 handle_76(struct bregs *regs)
744 SET_BDA(floppy_harddisk_info, 0xff);