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 "util.h" // debug_enter
12 #include "ata.h" // ATA_*
13 #include "pic.h" // eoi_pic2
15 #define DEBUGF1(fmt, args...) bprintf(0, fmt , ##args)
16 #define DEBUGF(fmt, args...)
19 /****************************************************************
21 ****************************************************************/
24 __disk_ret(const char *fname, struct bregs *regs, u8 code)
26 SET_BDA(disk_last_status, code);
28 __set_code_fail(fname, regs, code);
30 set_code_success(regs);
34 __disk_stub(const char *fname, struct bregs *regs)
36 __debug_stub(fname, regs);
37 __disk_ret(fname, regs, DISK_RET_SUCCESS);
40 #define DISK_STUB(regs) \
41 __disk_stub(__func__, (regs))
44 basic_access(struct bregs *regs, u8 device, u16 command)
46 u8 type = GET_EBDA(ata.devices[device].type);
48 if (type == ATA_TYPE_ATA) {
49 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
50 nlh = GET_EBDA(ata.devices[device].lchs.heads);
51 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
53 // Must be cd emulation.
54 nlc = GET_EBDA(cdemu.vdevice.cylinders);
55 nlh = GET_EBDA(cdemu.vdevice.heads);
56 nlspt = GET_EBDA(cdemu.vdevice.spt);
60 u16 cylinder = regs->ch | ((((u16) regs->cl) << 2) & 0x300);
61 u16 sector = regs->cl & 0x3f;
64 if (count > 128 || count == 0 || sector == 0) {
65 dprintf(1, "int13_harddisk: function %02x, parameter out of range!\n"
67 disk_ret(regs, DISK_RET_EPARAM);
71 // sanity check on cyl heads, sec
72 if (cylinder >= nlc || head >= nlh || sector > nlspt) {
73 dprintf(1, "int13_harddisk: function %02x, parameters out of"
74 " range %04x/%04x/%04x!\n"
75 , regs->ah, cylinder, head, sector);
76 disk_ret(regs, DISK_RET_EPARAM);
82 disk_ret(regs, DISK_RET_SUCCESS);
86 // translate lchs to lba
87 u32 lba = (((((u32)cylinder * (u32)nlh) + (u32)head) * (u32)nlspt)
90 u16 segment = regs->es;
91 u16 offset = regs->bx;
92 void *far_buffer = MAKE_FARPTR(segment, offset);
97 if (type == ATA_TYPE_ATA)
98 status = ata_cmd_data(device, command, lba, count, far_buffer);
100 status = cdrom_read_emu(device, lba, count, far_buffer);
104 // Set nb of sector transferred
105 regs->al = GET_EBDA(ata.trsfsectors);
108 dprintf(1, "int13_harddisk: function %02x, error %02x !\n"
110 disk_ret(regs, DISK_RET_EBADTRACK);
112 disk_ret(regs, DISK_RET_SUCCESS);
116 extended_access(struct bregs *regs, u8 device, u16 command)
118 // Get lba and check.
119 u64 lba = GET_INT13EXT(regs, lba);
120 u8 type = GET_EBDA(ata.devices[device].type);
121 if (type == ATA_TYPE_ATA
122 && lba >= GET_EBDA(ata.devices[device].sectors)) {
123 dprintf(1, "int13_harddisk: function %02x. LBA out of range\n"
125 disk_ret(regs, DISK_RET_EPARAM);
131 disk_ret(regs, DISK_RET_SUCCESS);
135 u16 segment = GET_INT13EXT(regs, segment);
136 u16 offset = GET_INT13EXT(regs, offset);
137 void *far_buffer = MAKE_FARPTR(segment, offset);
138 u16 count = GET_INT13EXT(regs, count);
143 if (type == ATA_TYPE_ATA)
144 status = ata_cmd_data(device, command, lba, count, far_buffer);
146 status = cdrom_read(device, lba, count, far_buffer);
150 SET_INT13EXT(regs, count, GET_EBDA(ata.trsfsectors));
153 dprintf(1, "int13_harddisk: function %02x, error %02x !\n"
155 disk_ret(regs, DISK_RET_EBADTRACK);
158 disk_ret(regs, DISK_RET_SUCCESS);
162 /****************************************************************
163 * Hard Drive functions
164 ****************************************************************/
166 // disk controller reset
168 disk_1300(struct bregs *regs, u8 device)
175 disk_1301(struct bregs *regs, u8 device)
177 u8 v = GET_BDA(disk_last_status);
180 // XXX - clear disk_last_status?
185 disk_1302(struct bregs *regs, u8 device)
187 basic_access(regs, device, ATA_CMD_READ_SECTORS);
190 // write disk sectors
192 disk_1303(struct bregs *regs, u8 device)
194 basic_access(regs, device, ATA_CMD_WRITE_SECTORS);
197 // verify disk sectors
199 disk_1304(struct bregs *regs, u8 device)
201 basic_access(regs, device, 0);
207 disk_1305(struct bregs *regs, u8 device)
212 // read disk drive parameters
214 disk_1308(struct bregs *regs, u8 device)
216 // Get logical geometry from table
217 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
218 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
219 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
220 u16 count = GET_EBDA(ata.hdcount);
222 nlc = nlc - 2; /* 0 based , last sector not used */
224 regs->ch = nlc & 0xff;
225 regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f);
227 regs->dl = count; /* FIXME returns 0, 1, or n hard drives */
229 // FIXME should set ES & DI
230 disk_ret(regs, DISK_RET_SUCCESS);
233 // initialize drive parameters
235 disk_1309(struct bregs *regs, u8 device)
240 // seek to specified cylinder
242 disk_130c(struct bregs *regs, u8 device)
247 // alternate disk reset
249 disk_130d(struct bregs *regs, u8 device)
256 disk_1310(struct bregs *regs, u8 device)
258 // should look at 40:8E also???
260 // Read the status from controller
261 u8 status = inb(GET_EBDA(ata.channels[device/2].iobase1) + ATA_CB_STAT);
262 if ( (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY )
263 disk_ret(regs, DISK_RET_SUCCESS);
265 disk_ret(regs, DISK_RET_ENOTREADY);
270 disk_1311(struct bregs *regs, u8 device)
275 // controller internal diagnostic
277 disk_1314(struct bregs *regs, u8 device)
282 // read disk drive size
284 disk_1315(struct bregs *regs, u8 device)
286 // Get logical geometry from table
287 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
288 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
289 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
291 // Compute sector count seen by int13
292 u32 lba = (u32)(nlc - 1) * (u32)nlh * (u32)nlspt;
293 regs->cx = lba >> 16;
294 regs->dx = lba & 0xffff;
296 disk_ret(regs, DISK_RET_SUCCESS);
297 regs->ah = 3; // hard disk accessible
300 // IBM/MS installation check
302 disk_1341(struct bregs *regs, u8 device)
304 regs->bx = 0xaa55; // install check
305 regs->cx = 0x0007; // ext disk access and edd, removable supported
306 disk_ret(regs, DISK_RET_SUCCESS);
307 regs->ah = 0x30; // EDD 3.0
310 // IBM/MS extended read
312 disk_1342(struct bregs *regs, u8 device)
314 extended_access(regs, device, ATA_CMD_READ_SECTORS);
317 // IBM/MS extended write
319 disk_1343(struct bregs *regs, u8 device)
321 extended_access(regs, device, ATA_CMD_WRITE_SECTORS);
326 disk_1344(struct bregs *regs, u8 device)
328 extended_access(regs, device, 0);
331 // IBM/MS lock/unlock drive
333 disk_1345(struct bregs *regs, u8 device)
335 // Always success for HD
336 disk_ret(regs, DISK_RET_SUCCESS);
339 // IBM/MS eject media
341 disk_1346(struct bregs *regs, u8 device)
343 // Volume Not Removable
344 disk_ret(regs, DISK_RET_ENOTREMOVABLE);
347 // IBM/MS extended seek
349 disk_1347(struct bregs *regs, u8 device)
351 extended_access(regs, device, 0);
354 // IBM/MS get drive parameters
356 disk_1348(struct bregs *regs, u8 device)
358 u16 size = GET_INT13DPT(regs, size);
360 // Buffer is too small
362 disk_ret(regs, DISK_RET_EPARAM);
368 u8 type = GET_EBDA(ata.devices[device].type);
369 u16 npc = GET_EBDA(ata.devices[device].pchs.cylinders);
370 u16 nph = GET_EBDA(ata.devices[device].pchs.heads);
371 u16 npspt = GET_EBDA(ata.devices[device].pchs.spt);
372 u64 lba = GET_EBDA(ata.devices[device].sectors);
373 u16 blksize = GET_EBDA(ata.devices[device].blksize);
375 SET_INT13DPT(regs, size, 0x1a);
376 if (type == ATA_TYPE_ATA) {
377 if (lba > (u64)npspt*nph*0x3fff) {
378 SET_INT13DPT(regs, infos, 0x00); // geometry is invalid
379 SET_INT13DPT(regs, cylinders, 0x3fff);
381 SET_INT13DPT(regs, infos, 0x02); // geometry is valid
382 SET_INT13DPT(regs, cylinders, (u32)npc);
384 SET_INT13DPT(regs, heads, (u32)nph);
385 SET_INT13DPT(regs, spt, (u32)npspt);
386 SET_INT13DPT(regs, sector_count, lba);
389 // 0x74 = removable, media change, lockable, max values
390 SET_INT13DPT(regs, infos, 0x74);
391 SET_INT13DPT(regs, cylinders, 0xffffffff);
392 SET_INT13DPT(regs, heads, 0xffffffff);
393 SET_INT13DPT(regs, spt, 0xffffffff);
394 SET_INT13DPT(regs, sector_count, (u64)-1);
396 SET_INT13DPT(regs, blksize, blksize);
399 disk_ret(regs, DISK_RET_SUCCESS);
405 SET_INT13DPT(regs, size, 0x1e);
407 SET_INT13DPT(regs, dpte_segment, SEG_EBDA);
408 SET_INT13DPT(regs, dpte_offset
409 , offsetof(struct extended_bios_data_area_s, ata.dpte));
412 u8 channel = device / 2;
413 u16 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
414 u16 iobase2 = GET_EBDA(ata.channels[channel].iobase2);
415 u8 irq = GET_EBDA(ata.channels[channel].irq);
416 u8 mode = GET_EBDA(ata.devices[device].mode);
419 if (type == ATA_TYPE_ATA) {
420 u8 translation = GET_EBDA(ata.devices[device].translation);
421 options = (translation==ATA_TRANSLATION_NONE?0:1)<<3; // chs translation
422 options |= (translation==ATA_TRANSLATION_LBA?1:0)<<9;
423 options |= (translation==ATA_TRANSLATION_RECHS?3:0)<<9;
426 options = (1<<5); // removable device
427 options |= (1<<6); // atapi device
429 options |= (1<<4); // lba translation
430 options |= (mode==ATA_MODE_PIO32?1:0)<<7;
432 SET_EBDA(ata.dpte.iobase1, iobase1);
433 SET_EBDA(ata.dpte.iobase2, iobase2 + ATA_CB_DC);
434 SET_EBDA(ata.dpte.prefix, (0xe | (device % 2))<<4 );
435 SET_EBDA(ata.dpte.unused, 0xcb );
436 SET_EBDA(ata.dpte.irq, irq );
437 SET_EBDA(ata.dpte.blkcount, 1 );
438 SET_EBDA(ata.dpte.dma, 0 );
439 SET_EBDA(ata.dpte.pio, 0 );
440 SET_EBDA(ata.dpte.options, options);
441 SET_EBDA(ata.dpte.reserved, 0);
443 SET_EBDA(ata.dpte.revision, 0x11);
445 SET_EBDA(ata.dpte.revision, 0x10);
447 u8 *p = MAKE_FARPTR(SEG_EBDA
448 , offsetof(struct extended_bios_data_area_s, ata.dpte));
449 u8 sum = checksum(p, 15);
450 SET_EBDA(ata.dpte.checksum, ~sum);
453 disk_ret(regs, DISK_RET_SUCCESS);
458 channel = device / 2;
459 u8 iface = GET_EBDA(ata.channels[channel].iface);
460 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
462 SET_INT13DPT(regs, size, 0x42);
463 SET_INT13DPT(regs, key, 0xbedd);
464 SET_INT13DPT(regs, dpi_length, 0x24);
465 SET_INT13DPT(regs, reserved1, 0);
466 SET_INT13DPT(regs, reserved2, 0);
468 if (iface==ATA_IFACE_ISA) {
469 SET_INT13DPT(regs, host_bus[0], 'I');
470 SET_INT13DPT(regs, host_bus[1], 'S');
471 SET_INT13DPT(regs, host_bus[2], 'A');
472 SET_INT13DPT(regs, host_bus[3], 0);
476 SET_INT13DPT(regs, iface_type[0], 'A');
477 SET_INT13DPT(regs, iface_type[1], 'T');
478 SET_INT13DPT(regs, iface_type[2], 'A');
479 SET_INT13DPT(regs, iface_type[3], 0);
481 if (iface==ATA_IFACE_ISA) {
482 SET_INT13DPT(regs, iface_path[0], iobase1);
483 SET_INT13DPT(regs, iface_path[2], 0);
484 SET_INT13DPT(regs, iface_path[4], 0L);
488 SET_INT13DPT(regs, device_path[0], device%2);
489 SET_INT13DPT(regs, device_path[1], 0);
490 SET_INT13DPT(regs, device_path[2], 0);
491 SET_INT13DPT(regs, device_path[4], 0L);
493 sum = checksum(MAKE_FARPTR(regs->ds, 30), 34);
494 SET_INT13DPT(regs, checksum, ~sum);
497 // IBM/MS extended media change
499 disk_1349(struct bregs *regs, u8 device)
501 // Always success for HD
502 disk_ret(regs, DISK_RET_SUCCESS);
506 disk_134e01(struct bregs *regs, u8 device)
508 disk_ret(regs, DISK_RET_SUCCESS);
512 disk_134e03(struct bregs *regs, u8 device)
514 disk_ret(regs, DISK_RET_SUCCESS);
518 disk_134e04(struct bregs *regs, u8 device)
520 disk_ret(regs, DISK_RET_SUCCESS);
524 disk_134e06(struct bregs *regs, u8 device)
526 disk_ret(regs, DISK_RET_SUCCESS);
530 disk_134eXX(struct bregs *regs, u8 device)
532 disk_ret(regs, DISK_RET_EPARAM);
535 // IBM/MS set hardware configuration
537 disk_134e(struct bregs *regs, u8 device)
540 case 0x01: disk_134e01(regs, device); break;
541 case 0x03: disk_134e03(regs, device); break;
542 case 0x04: disk_134e04(regs, device); break;
543 case 0x06: disk_134e06(regs, device); break;
544 default: disk_134eXX(regs, device); break;
549 disk_13XX(struct bregs *regs, u8 device)
551 disk_ret(regs, DISK_RET_EPARAM);
555 disk_13(struct bregs *regs, u8 device)
559 // clear completion flag
560 SET_BDA(disk_interrupt_flag, 0);
563 case 0x00: disk_1300(regs, device); break;
564 case 0x01: disk_1301(regs, device); break;
565 case 0x02: disk_1302(regs, device); break;
566 case 0x03: disk_1303(regs, device); break;
567 case 0x04: disk_1304(regs, device); break;
568 case 0x05: disk_1305(regs, device); break;
569 case 0x08: disk_1308(regs, device); break;
570 case 0x09: disk_1309(regs, device); break;
571 case 0x0c: disk_130c(regs, device); break;
572 case 0x0d: disk_130d(regs, device); break;
573 case 0x10: disk_1310(regs, device); break;
574 case 0x11: disk_1311(regs, device); break;
575 case 0x14: disk_1314(regs, device); break;
576 case 0x15: disk_1315(regs, device); break;
577 case 0x41: disk_1341(regs, device); break;
578 case 0x42: disk_1342(regs, device); break;
579 case 0x43: disk_1343(regs, device); break;
580 case 0x44: disk_1344(regs, device); break;
581 case 0x45: disk_1345(regs, device); break;
582 case 0x46: disk_1346(regs, device); break;
583 case 0x47: disk_1347(regs, device); break;
584 case 0x48: disk_1348(regs, device); break;
585 case 0x49: disk_1349(regs, device); break;
586 case 0x4e: disk_134e(regs, device); break;
587 default: disk_13XX(regs, device); break;
592 /****************************************************************
594 ****************************************************************/
597 get_device(struct bregs *regs, u8 iscd, u8 drive)
599 // basic check : device has to be defined
600 if (drive >= CONFIG_MAX_ATA_DEVICES) {
601 disk_ret(regs, DISK_RET_EPARAM);
602 return CONFIG_MAX_ATA_DEVICES;
605 // Get the ata channel
606 u8 device = GET_EBDA(ata.idmap[iscd][drive]);
608 // basic check : device has to be valid
609 if (device >= CONFIG_MAX_ATA_DEVICES) {
610 disk_ret(regs, DISK_RET_EPARAM);
611 return CONFIG_MAX_ATA_DEVICES;
618 handle_legacy_disk(struct bregs *regs, u8 drive)
621 floppy_13(regs, drive);
626 // XXX - old code had other disk access method.
627 disk_ret(regs, DISK_RET_EPARAM);
632 u8 device = get_device(regs, 1, drive - 0xe0);
633 if (device >= CONFIG_MAX_ATA_DEVICES)
635 cdrom_13(regs, device);
639 u8 device = get_device(regs, 0, drive - 0x80);
640 if (device >= CONFIG_MAX_ATA_DEVICES)
642 disk_13(regs, device);
646 handle_40(struct bregs *regs)
648 debug_enter(regs, DEBUG_HDL_40);
649 handle_legacy_disk(regs, regs->dl);
652 // INT 13h Fixed Disk Services Entry Point
654 handle_13(struct bregs *regs)
656 debug_enter(regs, DEBUG_HDL_13);
659 if (CONFIG_CDROM_EMU) {
660 if (regs->ah == 0x4b) {
664 if (GET_EBDA(cdemu.active)) {
665 if (drive == GET_EBDA(cdemu.emulated_drive)) {
673 handle_legacy_disk(regs, drive);
676 // record completion in BIOS task complete flag
680 debug_isr(DEBUG_ISR_76);
681 SET_BDA(disk_interrupt_flag, 0xff);