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"
148 disk_ret(regs, DISK_RET_EBADTRACK);
151 disk_ret(regs, DISK_RET_SUCCESS);
155 extended_access(struct bregs *regs, u8 device, u16 command)
157 u16 count = GET_INT13EXT(regs, count);
158 u16 segment = GET_INT13EXT(regs, segment);
159 u16 offset = GET_INT13EXT(regs, offset);
161 // Can't use 64 bits lba
162 u32 lba = GET_INT13EXT(regs, lba2);
164 BX_PANIC("int13_harddisk: function %02x. Can't use 64bits lba\n"
166 disk_ret(regs, DISK_RET_EPARAM);
170 u8 type = GET_EBDA(ata.devices[device].type);
172 // Get 32 bits lba and check
173 lba = GET_INT13EXT(regs, lba1);
174 if (type == ATA_TYPE_ATA
175 && lba >= GET_EBDA(ata.devices[device].sectors)) {
176 BX_INFO("int13_harddisk: function %02x. LBA out of range\n", regs->ah);
177 disk_ret(regs, DISK_RET_EPARAM);
183 disk_ret(regs, DISK_RET_SUCCESS);
190 if (type == ATA_TYPE_ATA)
191 status = ata_cmd_data(device, command, lba, count
192 , MAKE_32_PTR(segment, offset));
194 status = cdrom_read(device, lba, count*2048
195 , MAKE_32_PTR(segment, offset), 0);
199 SET_INT13EXT(regs, count, GET_EBDA(ata.trsfsectors));
202 BX_INFO("int13_harddisk: function %02x, error %02x !\n"
204 disk_ret(regs, DISK_RET_EBADTRACK);
207 disk_ret(regs, DISK_RET_SUCCESS);
211 /****************************************************************
212 * Hard Drive functions
213 ****************************************************************/
215 // disk controller reset
217 disk_1300(struct bregs *regs, u8 device)
224 disk_1301(struct bregs *regs, u8 device)
226 u8 v = GET_BDA(disk_last_status);
229 // XXX - clear disk_last_status?
234 disk_1302(struct bregs *regs, u8 device)
236 basic_access(regs, device, ATA_CMD_READ_SECTORS);
239 // write disk sectors
241 disk_1303(struct bregs *regs, u8 device)
243 basic_access(regs, device, ATA_CMD_WRITE_SECTORS);
246 // verify disk sectors
248 disk_1304(struct bregs *regs, u8 device)
250 basic_access(regs, device, 0);
256 disk_1305(struct bregs *regs, u8 device)
261 // read disk drive parameters
263 disk_1308(struct bregs *regs, u8 device)
265 // Get logical geometry from table
266 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
267 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
268 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
269 u16 count = GET_EBDA(ata.hdcount);
271 nlc = nlc - 2; /* 0 based , last sector not used */
273 regs->ch = nlc & 0xff;
274 regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f);
276 regs->dl = count; /* FIXME returns 0, 1, or n hard drives */
278 // FIXME should set ES & DI
279 disk_ret(regs, DISK_RET_SUCCESS);
282 // initialize drive parameters
284 disk_1309(struct bregs *regs, u8 device)
289 // seek to specified cylinder
291 disk_130c(struct bregs *regs, u8 device)
296 // alternate disk reset
298 disk_130d(struct bregs *regs, u8 device)
305 disk_1310(struct bregs *regs, u8 device)
307 // should look at 40:8E also???
309 // Read the status from controller
310 u8 status = inb(GET_EBDA(ata.channels[device/2].iobase1) + ATA_CB_STAT);
311 if ( (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY )
312 disk_ret(regs, DISK_RET_SUCCESS);
314 disk_ret(regs, DISK_RET_ENOTREADY);
319 disk_1311(struct bregs *regs, u8 device)
324 // controller internal diagnostic
326 disk_1314(struct bregs *regs, u8 device)
331 // read disk drive size
333 disk_1315(struct bregs *regs, u8 device)
335 // Get logical geometry from table
336 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
337 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
338 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
340 // Compute sector count seen by int13
341 u32 lba = (u32)(nlc - 1) * (u32)nlh * (u32)nlspt;
342 regs->cx = lba >> 16;
343 regs->dx = lba & 0xffff;
345 disk_ret(regs, DISK_RET_SUCCESS);
346 regs->ah = 3; // hard disk accessible
349 // IBM/MS installation check
351 disk_1341(struct bregs *regs, u8 device)
353 regs->bx = 0xaa55; // install check
354 regs->cx = 0x0007; // ext disk access and edd, removable supported
355 disk_ret(regs, DISK_RET_SUCCESS);
356 regs->ah = 0x30; // EDD 3.0
359 // IBM/MS extended read
361 disk_1342(struct bregs *regs, u8 device)
363 extended_access(regs, device, ATA_CMD_READ_SECTORS);
366 // IBM/MS extended write
368 disk_1343(struct bregs *regs, u8 device)
370 extended_access(regs, device, ATA_CMD_WRITE_SECTORS);
375 disk_1344(struct bregs *regs, u8 device)
377 extended_access(regs, device, 0);
380 // IBM/MS lock/unlock drive
382 disk_1345(struct bregs *regs, u8 device)
384 // Always success for HD
385 disk_ret(regs, DISK_RET_SUCCESS);
388 // IBM/MS eject media
390 disk_1346(struct bregs *regs, u8 device)
392 // Volume Not Removable
393 disk_ret(regs, DISK_RET_ENOTREMOVABLE);
396 // IBM/MS extended seek
398 disk_1347(struct bregs *regs, u8 device)
400 extended_access(regs, device, 0);
403 // IBM/MS get drive parameters
405 disk_1348(struct bregs *regs, u8 device)
407 u16 size = GET_INT13DPT(regs, size);
409 // Buffer is too small
411 disk_ret(regs, DISK_RET_EPARAM);
417 u8 type = GET_EBDA(ata.devices[device].type);
418 u16 npc = GET_EBDA(ata.devices[device].pchs.cylinders);
419 u16 nph = GET_EBDA(ata.devices[device].pchs.heads);
420 u16 npspt = GET_EBDA(ata.devices[device].pchs.spt);
421 u32 lba = GET_EBDA(ata.devices[device].sectors);
422 u16 blksize = GET_EBDA(ata.devices[device].blksize);
424 SET_INT13DPT(regs, size, 0x1a);
425 if (type == ATA_TYPE_ATA) {
426 if ((lba/npspt)/nph > 0x3fff) {
427 SET_INT13DPT(regs, infos, 0x00); // geometry is invalid
428 SET_INT13DPT(regs, cylinders, 0x3fff);
430 SET_INT13DPT(regs, infos, 0x02); // geometry is valid
431 SET_INT13DPT(regs, cylinders, (u32)npc);
433 SET_INT13DPT(regs, heads, (u32)nph);
434 SET_INT13DPT(regs, spt, (u32)npspt);
435 SET_INT13DPT(regs, sector_count1, lba); // FIXME should be Bit64
436 SET_INT13DPT(regs, sector_count2, 0L);
439 // 0x74 = removable, media change, lockable, max values
440 SET_INT13DPT(regs, infos, 0x74);
441 SET_INT13DPT(regs, cylinders, 0xffffffff);
442 SET_INT13DPT(regs, heads, 0xffffffff);
443 SET_INT13DPT(regs, spt, 0xffffffff);
444 SET_INT13DPT(regs, sector_count1, 0xffffffff); // FIXME should be Bit64
445 SET_INT13DPT(regs, sector_count2, 0xffffffff);
447 SET_INT13DPT(regs, blksize, blksize);
450 disk_ret(regs, DISK_RET_SUCCESS);
456 SET_INT13DPT(regs, size, 0x1e);
458 SET_INT13DPT(regs, dpte_segment, EBDA_SEG);
459 SET_INT13DPT(regs, dpte_offset
460 , offsetof(struct extended_bios_data_area_s, ata.dpte));
463 u8 channel = device / 2;
464 u16 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
465 u16 iobase2 = GET_EBDA(ata.channels[channel].iobase2);
466 u8 irq = GET_EBDA(ata.channels[channel].irq);
467 u8 mode = GET_EBDA(ata.devices[device].mode);
470 if (type == ATA_TYPE_ATA) {
471 u8 translation = GET_EBDA(ata.devices[device].translation);
472 options = (translation==ATA_TRANSLATION_NONE?0:1)<<3; // chs translation
473 options |= (translation==ATA_TRANSLATION_LBA?1:0)<<9;
474 options |= (translation==ATA_TRANSLATION_RECHS?3:0)<<9;
477 options = (1<<5); // removable device
478 options |= (1<<6); // atapi device
480 options |= (1<<4); // lba translation
481 options |= (mode==ATA_MODE_PIO32?1:0)<<7;
483 SET_EBDA(ata.dpte.iobase1, iobase1);
484 SET_EBDA(ata.dpte.iobase2, iobase2 + ATA_CB_DC);
485 SET_EBDA(ata.dpte.prefix, (0xe | (device % 2))<<4 );
486 SET_EBDA(ata.dpte.unused, 0xcb );
487 SET_EBDA(ata.dpte.irq, irq );
488 SET_EBDA(ata.dpte.blkcount, 1 );
489 SET_EBDA(ata.dpte.dma, 0 );
490 SET_EBDA(ata.dpte.pio, 0 );
491 SET_EBDA(ata.dpte.options, options);
492 SET_EBDA(ata.dpte.reserved, 0);
494 SET_EBDA(ata.dpte.revision, 0x11);
496 SET_EBDA(ata.dpte.revision, 0x10);
498 u8 sum = checksum_seg(EBDA_SEG
499 , offsetof(struct extended_bios_data_area_s, ata.dpte)
501 SET_EBDA(ata.dpte.checksum, ~sum);
504 disk_ret(regs, DISK_RET_SUCCESS);
509 channel = device / 2;
510 u8 iface = GET_EBDA(ata.channels[channel].iface);
511 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
513 SET_INT13DPT(regs, size, 0x42);
514 SET_INT13DPT(regs, key, 0xbedd);
515 SET_INT13DPT(regs, dpi_length, 0x24);
516 SET_INT13DPT(regs, reserved1, 0);
517 SET_INT13DPT(regs, reserved2, 0);
519 if (iface==ATA_IFACE_ISA) {
520 SET_INT13DPT(regs, host_bus[0], 'I');
521 SET_INT13DPT(regs, host_bus[1], 'S');
522 SET_INT13DPT(regs, host_bus[2], 'A');
523 SET_INT13DPT(regs, host_bus[3], 0);
527 SET_INT13DPT(regs, iface_type[0], 'A');
528 SET_INT13DPT(regs, iface_type[1], 'T');
529 SET_INT13DPT(regs, iface_type[2], 'A');
530 SET_INT13DPT(regs, iface_type[3], 0);
532 if (iface==ATA_IFACE_ISA) {
533 SET_INT13DPT(regs, iface_path[0], iobase1);
534 SET_INT13DPT(regs, iface_path[2], 0);
535 SET_INT13DPT(regs, iface_path[4], 0L);
539 SET_INT13DPT(regs, device_path[0], device%2);
540 SET_INT13DPT(regs, device_path[1], 0);
541 SET_INT13DPT(regs, device_path[2], 0);
542 SET_INT13DPT(regs, device_path[4], 0L);
544 sum = checksum_seg(regs->ds, 30, 34);
545 SET_INT13DPT(regs, checksum, ~sum);
548 // IBM/MS extended media change
550 disk_1349(struct bregs *regs, u8 device)
552 // Always success for HD
553 disk_ret(regs, DISK_RET_SUCCESS);
557 disk_134e01(struct bregs *regs, u8 device)
559 disk_ret(regs, DISK_RET_SUCCESS);
563 disk_134e03(struct bregs *regs, u8 device)
565 disk_ret(regs, DISK_RET_SUCCESS);
569 disk_134e04(struct bregs *regs, u8 device)
571 disk_ret(regs, DISK_RET_SUCCESS);
575 disk_134e06(struct bregs *regs, u8 device)
577 disk_ret(regs, DISK_RET_SUCCESS);
581 disk_134eXX(struct bregs *regs, u8 device)
584 disk_ret(regs, DISK_RET_EPARAM);
587 // IBM/MS set hardware configuration
589 disk_134e(struct bregs *regs, u8 device)
592 case 0x01: disk_134e01(regs, device); break;
593 case 0x03: disk_134e03(regs, device); break;
594 case 0x04: disk_134e04(regs, device); break;
595 case 0x06: disk_134e06(regs, device); break;
596 default: disk_134eXX(regs, device); break;
601 disk_13XX(struct bregs *regs, u8 device)
604 disk_ret(regs, DISK_RET_EPARAM);
608 disk_13(struct bregs *regs, u8 device)
612 // clear completion flag
613 SET_BDA(disk_interrupt_flag, 0);
616 case 0x00: disk_1300(regs, device); break;
617 case 0x01: disk_1301(regs, device); break;
618 case 0x02: disk_1302(regs, device); break;
619 case 0x03: disk_1303(regs, device); break;
620 case 0x04: disk_1304(regs, device); break;
621 case 0x05: disk_1305(regs, device); break;
622 case 0x08: disk_1308(regs, device); break;
623 case 0x09: disk_1309(regs, device); break;
624 case 0x0c: disk_130c(regs, device); break;
625 case 0x0d: disk_130d(regs, device); break;
626 case 0x10: disk_1310(regs, device); break;
627 case 0x11: disk_1311(regs, device); break;
628 case 0x14: disk_1314(regs, device); break;
629 case 0x15: disk_1315(regs, device); break;
630 case 0x41: disk_1341(regs, device); break;
631 case 0x42: disk_1342(regs, device); break;
632 case 0x43: disk_1343(regs, device); break;
633 case 0x44: disk_1344(regs, device); break;
634 case 0x45: disk_1345(regs, device); break;
635 case 0x46: disk_1346(regs, device); break;
636 case 0x47: disk_1347(regs, device); break;
637 case 0x48: disk_1348(regs, device); break;
638 case 0x49: disk_1349(regs, device); break;
639 case 0x4e: disk_134e(regs, device); break;
640 default: disk_13XX(regs, device); break;
645 /****************************************************************
647 ****************************************************************/
650 get_device(struct bregs *regs, u8 iscd, u8 drive)
652 // basic check : device has to be defined
653 if (drive >= CONFIG_MAX_ATA_DEVICES) {
654 disk_ret(regs, DISK_RET_EPARAM);
655 return CONFIG_MAX_ATA_DEVICES;
658 // Get the ata channel
659 u8 device = GET_EBDA(ata.idmap[iscd][drive]);
661 // basic check : device has to be valid
662 if (device >= CONFIG_MAX_ATA_DEVICES) {
663 disk_ret(regs, DISK_RET_EPARAM);
664 return CONFIG_MAX_ATA_DEVICES;
671 handle_legacy_disk(struct bregs *regs, u8 drive)
674 floppy_13(regs, drive);
679 // XXX - old code had other disk access method.
680 disk_ret(regs, DISK_RET_EPARAM);
685 u8 device = get_device(regs, 1, drive - 0xe0);
686 if (device >= CONFIG_MAX_ATA_DEVICES)
688 cdrom_13(regs, device);
692 u8 device = get_device(regs, 0, drive - 0x80);
693 if (device >= CONFIG_MAX_ATA_DEVICES)
695 disk_13(regs, device);
699 handle_40(struct bregs *regs)
702 handle_legacy_disk(regs, regs->dl);
705 // INT 13h Fixed Disk Services Entry Point
707 handle_13(struct bregs *regs)
712 if (CONFIG_CDROM_EMU) {
713 if (regs->ah == 0x4b) {
717 if (GET_EBDA(cdemu.active)) {
718 if (drive == GET_EBDA(cdemu.emulated_drive)) {
726 handle_legacy_disk(regs, drive);
729 // record completion in BIOS task complete flag
734 SET_BDA(disk_interrupt_flag, 0xff);