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 nbsectors = regs->al;
108 u16 cylinder = regs->ch | ((((u16) regs->cl) << 2) & 0x300);
109 u16 sector = regs->cl & 0x3f;
112 if ((nbsectors > 128) || (nbsectors == 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;
146 u32 elba = (u32)(vlba+nbsectors-1)/4;
147 u32 count = elba-slba+1;
150 u16 segment = regs->es;
151 u16 offset = regs->bx;
154 memset(atacmd, 0, sizeof(atacmd));
155 atacmd[0]=0x28; // READ command
156 atacmd[7]=(count & 0xff00) >> 8; // Sectors
157 atacmd[8]=(count & 0x00ff); // Sectors
158 atacmd[2]=(lba & 0xff000000) >> 24; // LBA
159 atacmd[3]=(lba & 0x00ff0000) >> 16;
160 atacmd[4]=(lba & 0x0000ff00) >> 8;
161 atacmd[5]=(lba & 0x000000ff);
163 u8 status = ata_cmd_packet(device, (u32)atacmd, sizeof(atacmd)
164 , before*512, count*2048L
165 , ATA_DATA_IN, segment, offset);
168 BX_INFO("int13_harddisk: function %02x, error %02x !\n",regs->ah,status);
170 disk_ret(regs, DISK_RET_EBADTRACK);
172 regs->al = nbsectors;
173 disk_ret(regs, DISK_RET_SUCCESS);
177 extended_access(struct bregs *regs, u8 device, u16 command)
179 u16 count = GET_INT13EXT(regs, count);
180 u16 segment = GET_INT13EXT(regs, segment);
181 u16 offset = GET_INT13EXT(regs, offset);
183 // Can't use 64 bits lba
184 u32 lba = GET_INT13EXT(regs, lba2);
186 BX_PANIC("int13_harddisk: function %02x. Can't use 64bits lba\n"
188 disk_ret(regs, DISK_RET_EPARAM);
192 u8 type = GET_EBDA(ata.devices[device].type);
194 // Get 32 bits lba and check
195 lba = GET_INT13EXT(regs, lba1);
196 if (type == ATA_TYPE_ATA
197 && lba >= GET_EBDA(ata.devices[device].sectors)) {
198 BX_INFO("int13_harddisk: function %02x. LBA out of range\n", regs->ah);
199 disk_ret(regs, DISK_RET_EPARAM);
205 case ATA_CMD_READ_SECTORS:
206 if (type == ATA_TYPE_ATA) {
207 status = ata_cmd_data_in(device, ATA_CMD_READ_SECTORS
209 , lba, segment, offset);
212 memset(atacmd, 0, sizeof(atacmd));
213 atacmd[0]=0x28; // READ command
214 atacmd[7]=(count & 0xff00) >> 8; // Sectors
215 atacmd[8]=(count & 0x00ff); // Sectors
216 atacmd[2]=(lba & 0xff000000) >> 24; // LBA
217 atacmd[3]=(lba & 0x00ff0000) >> 16;
218 atacmd[4]=(lba & 0x0000ff00) >> 8;
219 atacmd[5]=(lba & 0x000000ff);
221 status = ata_cmd_packet(device, (u32)atacmd, sizeof(atacmd)
223 , ATA_DATA_IN, segment, offset);
226 case ATA_CMD_WRITE_SECTORS:
227 status = ata_cmd_data_out(device, ATA_CMD_WRITE_SECTORS
229 , lba, segment, offset);
233 disk_ret(regs, DISK_RET_SUCCESS);
237 SET_INT13EXT(regs, count, GET_EBDA(ata.trsfsectors));
240 BX_INFO("int13_harddisk: function %02x, error %02x !\n"
242 disk_ret(regs, DISK_RET_EBADTRACK);
245 disk_ret(regs, DISK_RET_SUCCESS);
249 /****************************************************************
250 * Hard Drive functions
251 ****************************************************************/
253 // disk controller reset
255 disk_1300(struct bregs *regs, u8 device)
262 disk_1301(struct bregs *regs, u8 device)
264 regs->ah = GET_BDA(disk_last_status);
265 disk_ret(regs, DISK_RET_SUCCESS);
270 disk_1302(struct bregs *regs, u8 device)
272 basic_access(regs, device, ATA_CMD_READ_SECTORS);
275 // write disk sectors
277 disk_1303(struct bregs *regs, u8 device)
279 basic_access(regs, device, ATA_CMD_WRITE_SECTORS);
282 // verify disk sectors
284 disk_1304(struct bregs *regs, u8 device)
286 basic_access(regs, device, 0);
292 disk_1305(struct bregs *regs, u8 device)
297 // read disk drive parameters
299 disk_1308(struct bregs *regs, u8 device)
301 // Get logical geometry from table
302 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
303 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
304 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
305 u16 count = GET_EBDA(ata.hdcount);
307 nlc = nlc - 2; /* 0 based , last sector not used */
309 regs->ch = nlc & 0xff;
310 regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f);
312 regs->dl = count; /* FIXME returns 0, 1, or n hard drives */
314 // FIXME should set ES & DI
315 disk_ret(regs, DISK_RET_SUCCESS);
318 // initialize drive parameters
320 disk_1309(struct bregs *regs, u8 device)
325 // seek to specified cylinder
327 disk_130c(struct bregs *regs, u8 device)
332 // alternate disk reset
334 disk_130d(struct bregs *regs, u8 device)
341 disk_1310(struct bregs *regs, u8 device)
343 // should look at 40:8E also???
345 // Read the status from controller
346 u8 status = inb(GET_EBDA(ata.channels[device/2].iobase1) + ATA_CB_STAT);
347 if ( (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY )
348 disk_ret(regs, DISK_RET_SUCCESS);
350 disk_ret(regs, DISK_RET_ENOTREADY);
355 disk_1311(struct bregs *regs, u8 device)
360 // controller internal diagnostic
362 disk_1314(struct bregs *regs, u8 device)
367 // read disk drive size
369 disk_1315(struct bregs *regs, u8 device)
371 // Get logical geometry from table
372 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
373 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
374 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
376 // Compute sector count seen by int13
377 u32 lba = (u32)(nlc - 1) * (u32)nlh * (u32)nlspt;
378 regs->cx = lba >> 16;
379 regs->dx = lba & 0xffff;
382 regs->ah = 3; // hard disk accessible
385 // IBM/MS installation check
387 disk_1341(struct bregs *regs, u8 device)
389 regs->bx = 0xaa55; // install check
390 regs->cx = 0x0007; // ext disk access and edd, removable supported
391 disk_ret(regs, DISK_RET_SUCCESS);
392 regs->ah = 0x30; // EDD 3.0
395 // IBM/MS extended read
397 disk_1342(struct bregs *regs, u8 device)
399 extended_access(regs, device, ATA_CMD_READ_SECTORS);
402 // IBM/MS extended write
404 disk_1343(struct bregs *regs, u8 device)
406 extended_access(regs, device, ATA_CMD_WRITE_SECTORS);
411 disk_1344(struct bregs *regs, u8 device)
413 extended_access(regs, device, 0);
416 // IBM/MS lock/unlock drive
418 disk_1345(struct bregs *regs, u8 device)
420 // Always success for HD
421 disk_ret(regs, DISK_RET_SUCCESS);
424 // IBM/MS eject media
426 disk_1346(struct bregs *regs, u8 device)
428 // Volume Not Removable
429 disk_ret(regs, DISK_RET_ENOTREMOVABLE);
432 // IBM/MS extended seek
434 disk_1347(struct bregs *regs, u8 device)
436 extended_access(regs, device, 0);
439 // IBM/MS get drive parameters
441 disk_1348(struct bregs *regs, u8 device)
443 u16 size = GET_INT13DPT(regs, size);
445 // Buffer is too small
447 disk_ret(regs, DISK_RET_EPARAM);
453 u8 type = GET_EBDA(ata.devices[device].type);
454 u16 npc = GET_EBDA(ata.devices[device].pchs.cylinders);
455 u16 nph = GET_EBDA(ata.devices[device].pchs.heads);
456 u16 npspt = GET_EBDA(ata.devices[device].pchs.spt);
457 u32 lba = GET_EBDA(ata.devices[device].sectors);
458 u16 blksize = GET_EBDA(ata.devices[device].blksize);
460 SET_INT13DPT(regs, size, 0x1a);
461 if (type == ATA_TYPE_ATA) {
462 if ((lba/npspt)/nph > 0x3fff) {
463 SET_INT13DPT(regs, infos, 0x00); // geometry is invalid
464 SET_INT13DPT(regs, cylinders, 0x3fff);
466 SET_INT13DPT(regs, infos, 0x02); // geometry is valid
467 SET_INT13DPT(regs, cylinders, (u32)npc);
469 SET_INT13DPT(regs, heads, (u32)nph);
470 SET_INT13DPT(regs, spt, (u32)npspt);
471 SET_INT13DPT(regs, sector_count1, lba); // FIXME should be Bit64
472 SET_INT13DPT(regs, sector_count2, 0L);
475 // 0x74 = removable, media change, lockable, max values
476 SET_INT13DPT(regs, infos, 0x74);
477 SET_INT13DPT(regs, cylinders, 0xffffffff);
478 SET_INT13DPT(regs, heads, 0xffffffff);
479 SET_INT13DPT(regs, spt, 0xffffffff);
480 SET_INT13DPT(regs, sector_count1, 0xffffffff); // FIXME should be Bit64
481 SET_INT13DPT(regs, sector_count2, 0xffffffff);
483 SET_INT13DPT(regs, blksize, blksize);
486 disk_ret(regs, DISK_RET_SUCCESS);
492 SET_INT13DPT(regs, size, 0x1e);
494 SET_INT13DPT(regs, dpte_segment, EBDA_SEG);
495 SET_INT13DPT(regs, dpte_offset
496 , offsetof(struct extended_bios_data_area_s, ata.dpte));
499 u8 channel = device / 2;
500 u16 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
501 u16 iobase2 = GET_EBDA(ata.channels[channel].iobase2);
502 u8 irq = GET_EBDA(ata.channels[channel].irq);
503 u8 mode = GET_EBDA(ata.devices[device].mode);
506 if (type == ATA_TYPE_ATA) {
507 u8 translation = GET_EBDA(ata.devices[device].translation);
508 options = (translation==ATA_TRANSLATION_NONE?0:1)<<3; // chs translation
509 options |= (translation==ATA_TRANSLATION_LBA?1:0)<<9;
510 options |= (translation==ATA_TRANSLATION_RECHS?3:0)<<9;
513 options = (1<<5); // removable device
514 options |= (1<<6); // atapi device
516 options |= (1<<4); // lba translation
517 options |= (mode==ATA_MODE_PIO32?1:0)<<7;
519 SET_EBDA(ata.dpte.iobase1, iobase1);
520 SET_EBDA(ata.dpte.iobase2, iobase2 + ATA_CB_DC);
521 SET_EBDA(ata.dpte.prefix, (0xe | (device % 2))<<4 );
522 SET_EBDA(ata.dpte.unused, 0xcb );
523 SET_EBDA(ata.dpte.irq, irq );
524 SET_EBDA(ata.dpte.blkcount, 1 );
525 SET_EBDA(ata.dpte.dma, 0 );
526 SET_EBDA(ata.dpte.pio, 0 );
527 SET_EBDA(ata.dpte.options, options);
528 SET_EBDA(ata.dpte.reserved, 0);
530 SET_EBDA(ata.dpte.revision, 0x11);
532 SET_EBDA(ata.dpte.revision, 0x10);
534 u8 sum = checksum_seg(EBDA_SEG
535 , offsetof(struct extended_bios_data_area_s, ata.dpte)
537 SET_EBDA(ata.dpte.checksum, ~sum);
540 disk_ret(regs, DISK_RET_SUCCESS);
545 channel = device / 2;
546 u8 iface = GET_EBDA(ata.channels[channel].iface);
547 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
549 SET_INT13DPT(regs, size, 0x42);
550 SET_INT13DPT(regs, key, 0xbedd);
551 SET_INT13DPT(regs, dpi_length, 0x24);
552 SET_INT13DPT(regs, reserved1, 0);
553 SET_INT13DPT(regs, reserved2, 0);
555 if (iface==ATA_IFACE_ISA) {
556 SET_INT13DPT(regs, host_bus[0], 'I');
557 SET_INT13DPT(regs, host_bus[1], 'S');
558 SET_INT13DPT(regs, host_bus[2], 'A');
559 SET_INT13DPT(regs, host_bus[3], 0);
563 SET_INT13DPT(regs, iface_type[0], 'A');
564 SET_INT13DPT(regs, iface_type[1], 'T');
565 SET_INT13DPT(regs, iface_type[2], 'A');
566 SET_INT13DPT(regs, iface_type[3], 0);
568 if (iface==ATA_IFACE_ISA) {
569 SET_INT13DPT(regs, iface_path[0], iobase1);
570 SET_INT13DPT(regs, iface_path[2], 0);
571 SET_INT13DPT(regs, iface_path[4], 0L);
575 SET_INT13DPT(regs, device_path[0], device%2);
576 SET_INT13DPT(regs, device_path[1], 0);
577 SET_INT13DPT(regs, device_path[2], 0);
578 SET_INT13DPT(regs, device_path[4], 0L);
580 sum = checksum_seg(regs->ds, 30, 34);
581 SET_INT13DPT(regs, checksum, ~sum);
584 // IBM/MS extended media change
586 disk_1349(struct bregs *regs, u8 device)
588 // Always success for HD
589 disk_ret(regs, DISK_RET_SUCCESS);
593 disk_134e01(struct bregs *regs, u8 device)
595 disk_ret(regs, DISK_RET_SUCCESS);
599 disk_134e03(struct bregs *regs, u8 device)
601 disk_ret(regs, DISK_RET_SUCCESS);
605 disk_134e04(struct bregs *regs, u8 device)
607 disk_ret(regs, DISK_RET_SUCCESS);
611 disk_134e06(struct bregs *regs, u8 device)
613 disk_ret(regs, DISK_RET_SUCCESS);
617 disk_134eXX(struct bregs *regs, u8 device)
620 disk_ret(regs, DISK_RET_EPARAM);
623 // IBM/MS set hardware configuration
625 disk_134e(struct bregs *regs, u8 device)
628 case 0x01: disk_134e01(regs, device); break;
629 case 0x03: disk_134e03(regs, device); break;
630 case 0x04: disk_134e04(regs, device); break;
631 case 0x06: disk_134e06(regs, device); break;
632 default: disk_134eXX(regs, device); break;
637 disk_13XX(struct bregs *regs, u8 device)
640 disk_ret(regs, DISK_RET_EPARAM);
644 disk_13(struct bregs *regs, u8 device)
648 // clear completion flag
649 SET_BDA(disk_interrupt_flag, 0);
652 case 0x00: disk_1300(regs, device); break;
653 case 0x01: disk_1301(regs, device); break;
654 case 0x02: disk_1302(regs, device); break;
655 case 0x03: disk_1303(regs, device); break;
656 case 0x04: disk_1304(regs, device); break;
657 case 0x05: disk_1305(regs, device); break;
658 case 0x08: disk_1308(regs, device); break;
659 case 0x09: disk_1309(regs, device); break;
660 case 0x0c: disk_130c(regs, device); break;
661 case 0x0d: disk_130d(regs, device); break;
662 case 0x10: disk_1310(regs, device); break;
663 case 0x11: disk_1311(regs, device); break;
664 case 0x14: disk_1314(regs, device); break;
665 case 0x15: disk_1315(regs, device); break;
666 case 0x41: disk_1341(regs, device); break;
667 case 0x42: disk_1342(regs, device); break;
668 case 0x43: disk_1343(regs, device); break;
669 case 0x44: disk_1344(regs, device); break;
670 case 0x45: disk_1345(regs, device); break;
671 case 0x46: disk_1346(regs, device); break;
672 case 0x47: disk_1347(regs, device); break;
673 case 0x48: disk_1348(regs, device); break;
674 case 0x49: disk_1349(regs, device); break;
675 case 0x4e: disk_134e(regs, device); break;
676 default: disk_13XX(regs, device); break;
681 /****************************************************************
683 ****************************************************************/
686 get_device(struct bregs *regs, u8 drive)
688 // basic check : device has to be defined
689 if (drive >= CONFIG_MAX_ATA_DEVICES) {
690 disk_ret(regs, DISK_RET_EPARAM);
691 return CONFIG_MAX_ATA_DEVICES;
694 // Get the ata channel
695 u8 device = GET_EBDA(ata.hdidmap[drive]);
697 // basic check : device has to be valid
698 if (device >= CONFIG_MAX_ATA_DEVICES) {
699 disk_ret(regs, DISK_RET_EPARAM);
700 return CONFIG_MAX_ATA_DEVICES;
707 handle_legacy_disk(struct bregs *regs, u8 drive)
710 floppy_13(regs, drive);
715 // XXX - old code had other disk access method.
716 disk_ret(regs, DISK_RET_EPARAM);
721 u8 device = get_device(regs, drive - 0xe0);
722 if (device >= CONFIG_MAX_ATA_DEVICES)
724 cdrom_13(regs, device);
728 u8 device = get_device(regs, drive - 0x80);
729 if (device >= CONFIG_MAX_ATA_DEVICES)
731 disk_13(regs, device);
735 handle_40(struct bregs *regs)
738 handle_legacy_disk(regs, regs->dl);
742 // INT 13h Fixed Disk Services Entry Point
744 handle_13(struct bregs *regs)
749 if (CONFIG_ELTORITO_BOOT) {
750 if (regs->ah == 0x4b) {
754 if (GET_EBDA(cdemu.active)) {
755 if (drive == GET_EBDA(cdemu.emulated_drive)) {
762 handle_legacy_disk(regs, drive);
767 // record completion in BIOS task complete flag
769 handle_76(struct bregs *regs)
772 SET_BDA(floppy_harddisk_info, 0xff);