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);
58 // sanity check on cyl heads, sec
59 if (cylinder >= nlc || head >= nlh || sector > nlspt) {
60 BX_INFO("int13_harddisk: function %02x, parameters out of"
61 " range %04x/%04x/%04x!\n"
62 , regs->ah, cylinder, head, sector);
63 disk_ret(regs, DISK_RET_EPARAM);
69 disk_ret(regs, DISK_RET_SUCCESS);
73 u16 segment = regs->es;
74 u16 offset = regs->bx;
76 // translate lchs to lba
77 u32 lba = (((((u32)cylinder * (u32)nlh) + (u32)head) * (u32)nlspt)
80 u8 status = ata_cmd_data(device, command, lba, count
81 , MAKE_32_PTR(segment, offset));
84 // Set nb of sector transferred
85 regs->al = GET_EBDA(ata.trsfsectors);
88 BX_INFO("int13_harddisk: function %02x, error %02x !\n",regs->ah,status);
89 disk_ret(regs, DISK_RET_EBADTRACK);
91 disk_ret(regs, DISK_RET_SUCCESS);
95 emu_access(struct bregs *regs, u8 device, u16 command)
98 u16 cylinder = regs->ch | ((((u16) regs->cl) << 2) & 0x300);
99 u16 sector = regs->cl & 0x3f;
102 if ((count > 128) || (count == 0) || (sector == 0)) {
103 BX_INFO("int13_harddisk: function %02x, parameter out of range!\n"
105 disk_ret(regs, DISK_RET_EPARAM);
109 u16 nlc = GET_EBDA(cdemu.vdevice.cylinders);
110 u16 nlh = GET_EBDA(cdemu.vdevice.heads);
111 u16 nlspt = GET_EBDA(cdemu.vdevice.spt);
113 // sanity check on cyl heads, sec
114 if ( (cylinder >= nlc) || (head >= nlh) || (sector > nlspt )) {
115 BX_INFO("int13_harddisk: function %02x, parameters out of"
116 " range %04x/%04x/%04x!\n"
117 , regs->ah, cylinder, head, sector);
118 disk_ret(regs, DISK_RET_EPARAM);
124 disk_ret(regs, DISK_RET_SUCCESS);
128 u32 ilba = GET_EBDA(cdemu.ilba);
129 // calculate the virtual lba inside the image
130 u32 vlba= (((((u32)cylinder*(u32)nlh)+(u32)head)*(u32)nlspt)
133 u32 slba = (u32)vlba/4;
134 u16 before= (u16)vlba%4;
135 u32 lba = ilba + slba;
137 u16 segment = regs->es;
138 u16 offset = regs->bx;
141 u8 status = cdrom_read(device, lba, count*512
142 , MAKE_32_PTR(segment, offset), before*512);
145 BX_INFO("int13_harddisk: function %02x, error %02x !\n",regs->ah,status);
147 disk_ret(regs, DISK_RET_EBADTRACK);
150 disk_ret(regs, DISK_RET_SUCCESS);
154 extended_access(struct bregs *regs, u8 device, u16 command)
156 u16 count = GET_INT13EXT(regs, count);
157 u16 segment = GET_INT13EXT(regs, segment);
158 u16 offset = GET_INT13EXT(regs, offset);
160 // Can't use 64 bits lba
161 u32 lba = GET_INT13EXT(regs, lba2);
163 BX_PANIC("int13_harddisk: function %02x. Can't use 64bits lba\n"
165 disk_ret(regs, DISK_RET_EPARAM);
169 u8 type = GET_EBDA(ata.devices[device].type);
171 // Get 32 bits lba and check
172 lba = GET_INT13EXT(regs, lba1);
173 if (type == ATA_TYPE_ATA
174 && lba >= GET_EBDA(ata.devices[device].sectors)) {
175 BX_INFO("int13_harddisk: function %02x. LBA out of range\n", regs->ah);
176 disk_ret(regs, DISK_RET_EPARAM);
182 disk_ret(regs, DISK_RET_SUCCESS);
189 if (type == ATA_TYPE_ATA)
190 status = ata_cmd_data(device, command, lba, count
191 , MAKE_32_PTR(segment, offset));
193 status = cdrom_read(device, lba, count*2048
194 , MAKE_32_PTR(segment, offset), 0);
198 SET_INT13EXT(regs, count, GET_EBDA(ata.trsfsectors));
201 BX_INFO("int13_harddisk: function %02x, error %02x !\n"
203 disk_ret(regs, DISK_RET_EBADTRACK);
206 disk_ret(regs, DISK_RET_SUCCESS);
210 /****************************************************************
211 * Hard Drive functions
212 ****************************************************************/
214 // disk controller reset
216 disk_1300(struct bregs *regs, u8 device)
223 disk_1301(struct bregs *regs, u8 device)
225 regs->ah = GET_BDA(disk_last_status);
226 disk_ret(regs, DISK_RET_SUCCESS);
231 disk_1302(struct bregs *regs, u8 device)
233 basic_access(regs, device, ATA_CMD_READ_SECTORS);
236 // write disk sectors
238 disk_1303(struct bregs *regs, u8 device)
240 basic_access(regs, device, ATA_CMD_WRITE_SECTORS);
243 // verify disk sectors
245 disk_1304(struct bregs *regs, u8 device)
247 basic_access(regs, device, 0);
253 disk_1305(struct bregs *regs, u8 device)
258 // read disk drive parameters
260 disk_1308(struct bregs *regs, u8 device)
262 // Get logical geometry from table
263 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
264 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
265 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
266 u16 count = GET_EBDA(ata.hdcount);
268 nlc = nlc - 2; /* 0 based , last sector not used */
270 regs->ch = nlc & 0xff;
271 regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f);
273 regs->dl = count; /* FIXME returns 0, 1, or n hard drives */
275 // FIXME should set ES & DI
276 disk_ret(regs, DISK_RET_SUCCESS);
279 // initialize drive parameters
281 disk_1309(struct bregs *regs, u8 device)
286 // seek to specified cylinder
288 disk_130c(struct bregs *regs, u8 device)
293 // alternate disk reset
295 disk_130d(struct bregs *regs, u8 device)
302 disk_1310(struct bregs *regs, u8 device)
304 // should look at 40:8E also???
306 // Read the status from controller
307 u8 status = inb(GET_EBDA(ata.channels[device/2].iobase1) + ATA_CB_STAT);
308 if ( (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY )
309 disk_ret(regs, DISK_RET_SUCCESS);
311 disk_ret(regs, DISK_RET_ENOTREADY);
316 disk_1311(struct bregs *regs, u8 device)
321 // controller internal diagnostic
323 disk_1314(struct bregs *regs, u8 device)
328 // read disk drive size
330 disk_1315(struct bregs *regs, u8 device)
332 // Get logical geometry from table
333 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
334 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
335 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
337 // Compute sector count seen by int13
338 u32 lba = (u32)(nlc - 1) * (u32)nlh * (u32)nlspt;
339 regs->cx = lba >> 16;
340 regs->dx = lba & 0xffff;
342 disk_ret(regs, DISK_RET_SUCCESS);
343 regs->ah = 3; // hard disk accessible
346 // IBM/MS installation check
348 disk_1341(struct bregs *regs, u8 device)
350 regs->bx = 0xaa55; // install check
351 regs->cx = 0x0007; // ext disk access and edd, removable supported
352 disk_ret(regs, DISK_RET_SUCCESS);
353 regs->ah = 0x30; // EDD 3.0
356 // IBM/MS extended read
358 disk_1342(struct bregs *regs, u8 device)
360 extended_access(regs, device, ATA_CMD_READ_SECTORS);
363 // IBM/MS extended write
365 disk_1343(struct bregs *regs, u8 device)
367 extended_access(regs, device, ATA_CMD_WRITE_SECTORS);
372 disk_1344(struct bregs *regs, u8 device)
374 extended_access(regs, device, 0);
377 // IBM/MS lock/unlock drive
379 disk_1345(struct bregs *regs, u8 device)
381 // Always success for HD
382 disk_ret(regs, DISK_RET_SUCCESS);
385 // IBM/MS eject media
387 disk_1346(struct bregs *regs, u8 device)
389 // Volume Not Removable
390 disk_ret(regs, DISK_RET_ENOTREMOVABLE);
393 // IBM/MS extended seek
395 disk_1347(struct bregs *regs, u8 device)
397 extended_access(regs, device, 0);
400 // IBM/MS get drive parameters
402 disk_1348(struct bregs *regs, u8 device)
404 u16 size = GET_INT13DPT(regs, size);
406 // Buffer is too small
408 disk_ret(regs, DISK_RET_EPARAM);
414 u8 type = GET_EBDA(ata.devices[device].type);
415 u16 npc = GET_EBDA(ata.devices[device].pchs.cylinders);
416 u16 nph = GET_EBDA(ata.devices[device].pchs.heads);
417 u16 npspt = GET_EBDA(ata.devices[device].pchs.spt);
418 u32 lba = GET_EBDA(ata.devices[device].sectors);
419 u16 blksize = GET_EBDA(ata.devices[device].blksize);
421 SET_INT13DPT(regs, size, 0x1a);
422 if (type == ATA_TYPE_ATA) {
423 if ((lba/npspt)/nph > 0x3fff) {
424 SET_INT13DPT(regs, infos, 0x00); // geometry is invalid
425 SET_INT13DPT(regs, cylinders, 0x3fff);
427 SET_INT13DPT(regs, infos, 0x02); // geometry is valid
428 SET_INT13DPT(regs, cylinders, (u32)npc);
430 SET_INT13DPT(regs, heads, (u32)nph);
431 SET_INT13DPT(regs, spt, (u32)npspt);
432 SET_INT13DPT(regs, sector_count1, lba); // FIXME should be Bit64
433 SET_INT13DPT(regs, sector_count2, 0L);
436 // 0x74 = removable, media change, lockable, max values
437 SET_INT13DPT(regs, infos, 0x74);
438 SET_INT13DPT(regs, cylinders, 0xffffffff);
439 SET_INT13DPT(regs, heads, 0xffffffff);
440 SET_INT13DPT(regs, spt, 0xffffffff);
441 SET_INT13DPT(regs, sector_count1, 0xffffffff); // FIXME should be Bit64
442 SET_INT13DPT(regs, sector_count2, 0xffffffff);
444 SET_INT13DPT(regs, blksize, blksize);
447 disk_ret(regs, DISK_RET_SUCCESS);
453 SET_INT13DPT(regs, size, 0x1e);
455 SET_INT13DPT(regs, dpte_segment, EBDA_SEG);
456 SET_INT13DPT(regs, dpte_offset
457 , offsetof(struct extended_bios_data_area_s, ata.dpte));
460 u8 channel = device / 2;
461 u16 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
462 u16 iobase2 = GET_EBDA(ata.channels[channel].iobase2);
463 u8 irq = GET_EBDA(ata.channels[channel].irq);
464 u8 mode = GET_EBDA(ata.devices[device].mode);
467 if (type == ATA_TYPE_ATA) {
468 u8 translation = GET_EBDA(ata.devices[device].translation);
469 options = (translation==ATA_TRANSLATION_NONE?0:1)<<3; // chs translation
470 options |= (translation==ATA_TRANSLATION_LBA?1:0)<<9;
471 options |= (translation==ATA_TRANSLATION_RECHS?3:0)<<9;
474 options = (1<<5); // removable device
475 options |= (1<<6); // atapi device
477 options |= (1<<4); // lba translation
478 options |= (mode==ATA_MODE_PIO32?1:0)<<7;
480 SET_EBDA(ata.dpte.iobase1, iobase1);
481 SET_EBDA(ata.dpte.iobase2, iobase2 + ATA_CB_DC);
482 SET_EBDA(ata.dpte.prefix, (0xe | (device % 2))<<4 );
483 SET_EBDA(ata.dpte.unused, 0xcb );
484 SET_EBDA(ata.dpte.irq, irq );
485 SET_EBDA(ata.dpte.blkcount, 1 );
486 SET_EBDA(ata.dpte.dma, 0 );
487 SET_EBDA(ata.dpte.pio, 0 );
488 SET_EBDA(ata.dpte.options, options);
489 SET_EBDA(ata.dpte.reserved, 0);
491 SET_EBDA(ata.dpte.revision, 0x11);
493 SET_EBDA(ata.dpte.revision, 0x10);
495 u8 sum = checksum_seg(EBDA_SEG
496 , offsetof(struct extended_bios_data_area_s, ata.dpte)
498 SET_EBDA(ata.dpte.checksum, ~sum);
501 disk_ret(regs, DISK_RET_SUCCESS);
506 channel = device / 2;
507 u8 iface = GET_EBDA(ata.channels[channel].iface);
508 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
510 SET_INT13DPT(regs, size, 0x42);
511 SET_INT13DPT(regs, key, 0xbedd);
512 SET_INT13DPT(regs, dpi_length, 0x24);
513 SET_INT13DPT(regs, reserved1, 0);
514 SET_INT13DPT(regs, reserved2, 0);
516 if (iface==ATA_IFACE_ISA) {
517 SET_INT13DPT(regs, host_bus[0], 'I');
518 SET_INT13DPT(regs, host_bus[1], 'S');
519 SET_INT13DPT(regs, host_bus[2], 'A');
520 SET_INT13DPT(regs, host_bus[3], 0);
524 SET_INT13DPT(regs, iface_type[0], 'A');
525 SET_INT13DPT(regs, iface_type[1], 'T');
526 SET_INT13DPT(regs, iface_type[2], 'A');
527 SET_INT13DPT(regs, iface_type[3], 0);
529 if (iface==ATA_IFACE_ISA) {
530 SET_INT13DPT(regs, iface_path[0], iobase1);
531 SET_INT13DPT(regs, iface_path[2], 0);
532 SET_INT13DPT(regs, iface_path[4], 0L);
536 SET_INT13DPT(regs, device_path[0], device%2);
537 SET_INT13DPT(regs, device_path[1], 0);
538 SET_INT13DPT(regs, device_path[2], 0);
539 SET_INT13DPT(regs, device_path[4], 0L);
541 sum = checksum_seg(regs->ds, 30, 34);
542 SET_INT13DPT(regs, checksum, ~sum);
545 // IBM/MS extended media change
547 disk_1349(struct bregs *regs, u8 device)
549 // Always success for HD
550 disk_ret(regs, DISK_RET_SUCCESS);
554 disk_134e01(struct bregs *regs, u8 device)
556 disk_ret(regs, DISK_RET_SUCCESS);
560 disk_134e03(struct bregs *regs, u8 device)
562 disk_ret(regs, DISK_RET_SUCCESS);
566 disk_134e04(struct bregs *regs, u8 device)
568 disk_ret(regs, DISK_RET_SUCCESS);
572 disk_134e06(struct bregs *regs, u8 device)
574 disk_ret(regs, DISK_RET_SUCCESS);
578 disk_134eXX(struct bregs *regs, u8 device)
581 disk_ret(regs, DISK_RET_EPARAM);
584 // IBM/MS set hardware configuration
586 disk_134e(struct bregs *regs, u8 device)
589 case 0x01: disk_134e01(regs, device); break;
590 case 0x03: disk_134e03(regs, device); break;
591 case 0x04: disk_134e04(regs, device); break;
592 case 0x06: disk_134e06(regs, device); break;
593 default: disk_134eXX(regs, device); break;
598 disk_13XX(struct bregs *regs, u8 device)
601 disk_ret(regs, DISK_RET_EPARAM);
605 disk_13(struct bregs *regs, u8 device)
609 // clear completion flag
610 SET_BDA(disk_interrupt_flag, 0);
613 case 0x00: disk_1300(regs, device); break;
614 case 0x01: disk_1301(regs, device); break;
615 case 0x02: disk_1302(regs, device); break;
616 case 0x03: disk_1303(regs, device); break;
617 case 0x04: disk_1304(regs, device); break;
618 case 0x05: disk_1305(regs, device); break;
619 case 0x08: disk_1308(regs, device); break;
620 case 0x09: disk_1309(regs, device); break;
621 case 0x0c: disk_130c(regs, device); break;
622 case 0x0d: disk_130d(regs, device); break;
623 case 0x10: disk_1310(regs, device); break;
624 case 0x11: disk_1311(regs, device); break;
625 case 0x14: disk_1314(regs, device); break;
626 case 0x15: disk_1315(regs, device); break;
627 case 0x41: disk_1341(regs, device); break;
628 case 0x42: disk_1342(regs, device); break;
629 case 0x43: disk_1343(regs, device); break;
630 case 0x44: disk_1344(regs, device); break;
631 case 0x45: disk_1345(regs, device); break;
632 case 0x46: disk_1346(regs, device); break;
633 case 0x47: disk_1347(regs, device); break;
634 case 0x48: disk_1348(regs, device); break;
635 case 0x49: disk_1349(regs, device); break;
636 case 0x4e: disk_134e(regs, device); break;
637 default: disk_13XX(regs, device); break;
642 /****************************************************************
644 ****************************************************************/
647 get_device(struct bregs *regs, u8 iscd, u8 drive)
649 // basic check : device has to be defined
650 if (drive >= CONFIG_MAX_ATA_DEVICES) {
651 disk_ret(regs, DISK_RET_EPARAM);
652 return CONFIG_MAX_ATA_DEVICES;
655 // Get the ata channel
656 u8 device = GET_EBDA(ata.idmap[iscd][drive]);
658 // basic check : device has to be valid
659 if (device >= CONFIG_MAX_ATA_DEVICES) {
660 disk_ret(regs, DISK_RET_EPARAM);
661 return CONFIG_MAX_ATA_DEVICES;
668 handle_legacy_disk(struct bregs *regs, u8 drive)
671 floppy_13(regs, drive);
676 // XXX - old code had other disk access method.
677 disk_ret(regs, DISK_RET_EPARAM);
682 u8 device = get_device(regs, 1, drive - 0xe0);
683 if (device >= CONFIG_MAX_ATA_DEVICES)
685 cdrom_13(regs, device);
689 u8 device = get_device(regs, 0, drive - 0x80);
690 if (device >= CONFIG_MAX_ATA_DEVICES)
692 disk_13(regs, device);
696 handle_40(struct bregs *regs)
699 handle_legacy_disk(regs, regs->dl);
702 // INT 13h Fixed Disk Services Entry Point
704 handle_13(struct bregs *regs)
709 if (CONFIG_CDROM_BOOT) {
710 if (regs->ah == 0x4b) {
714 if (GET_EBDA(cdemu.active)) {
715 if (drive == GET_EBDA(cdemu.emulated_drive)) {
723 handle_legacy_disk(regs, drive);
726 // record completion in BIOS task complete flag
731 SET_BDA(disk_interrupt_flag, 0xff);