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" // SET_BDA
10 #include "config.h" // CONFIG_*
11 #include "util.h" // debug_enter
12 #include "pic.h" // eoi_pic2
13 #include "bregs.h" // struct bregs
14 #include "pci.h" // pci_bdf_to_bus
15 #include "atabits.h" // ATA_CB_STAT
18 /****************************************************************
20 ****************************************************************/
23 __disk_ret(const char *fname, int lineno, struct bregs *regs, u8 code)
25 SET_BDA(disk_last_status, code);
27 __set_code_fail(fname, lineno, regs, code);
29 set_code_success(regs);
33 __disk_stub(const char *fname, int lineno, struct bregs *regs)
35 __debug_stub(fname, lineno, regs);
36 __disk_ret(fname, lineno, regs, DISK_RET_SUCCESS);
39 #define DISK_STUB(regs) \
40 __disk_stub(__func__, __LINE__, (regs))
43 __send_disk_op(struct disk_op_s *op_p, u16 op_s)
46 memcpy_far(MAKE_FARPTR(GET_SEG(SS), &dop)
47 , MAKE_FARPTR(op_s, op_p)
50 dprintf(DEBUG_HDL_13, "disk_op d=%d lba=%d buf=%p count=%d cmd=%d\n"
51 , dop.driveid, (u32)dop.lba, dop.far_buffer
52 , dop.count, dop.command);
57 if (dop.command == CMD_CDEMU_READ)
58 status = cdrom_read_512(&dop);
59 else if (dop.command == CMD_CDROM_READ)
60 status = cdrom_read(&dop);
62 status = ata_cmd_data(&dop);
70 send_disk_op(struct disk_op_s *op)
72 return stack_hop((u32)op, GET_SEG(SS), 0, __send_disk_op);
76 basic_access(struct bregs *regs, u8 device, u16 command)
81 u8 type = GET_GLOBAL(ATA.devices[device].type);
83 if (type == ATA_TYPE_ATA) {
84 nlc = GET_GLOBAL(ATA.devices[device].lchs.cylinders);
85 nlh = GET_GLOBAL(ATA.devices[device].lchs.heads);
86 nlspt = GET_GLOBAL(ATA.devices[device].lchs.spt);
87 dop.command = command;
89 // Must be cd emulation.
90 u16 ebda_seg = get_ebda_seg();
91 nlc = GET_EBDA2(ebda_seg, cdemu.cylinders);
92 nlh = GET_EBDA2(ebda_seg, cdemu.heads);
93 nlspt = GET_EBDA2(ebda_seg, cdemu.spt);
94 dop.lba = GET_EBDA2(ebda_seg, cdemu.ilba) * 4;
95 dop.command = CMD_CDEMU_READ;
99 u16 cylinder = regs->ch | ((((u16) regs->cl) << 2) & 0x300);
100 u16 sector = regs->cl & 0x3f;
103 if (dop.count > 128 || dop.count == 0 || sector == 0) {
104 dprintf(1, "int13_harddisk: function %02x, parameter out of range!\n"
106 disk_ret(regs, DISK_RET_EPARAM);
110 // sanity check on cyl heads, sec
111 if (cylinder >= nlc || head >= nlh || sector > nlspt) {
112 dprintf(1, "int13_harddisk: function %02x, parameters out of"
113 " range %04x/%04x/%04x!\n"
114 , regs->ah, cylinder, head, sector);
115 disk_ret(regs, DISK_RET_EPARAM);
121 disk_ret(regs, DISK_RET_SUCCESS);
125 // translate lchs to lba
126 dop.lba += (((((u32)cylinder * (u32)nlh) + (u32)head) * (u32)nlspt)
129 u16 segment = regs->es;
130 u16 offset = regs->bx;
131 dop.far_buffer = MAKE_FARPTR(segment, offset);
133 int status = send_disk_op(&dop);
135 // Set nb of sector transferred
136 regs->al = GET_EBDA(sector_count);
139 dprintf(1, "int13_harddisk: function %02x, error %d!\n"
141 disk_ret(regs, DISK_RET_EBADTRACK);
144 disk_ret(regs, DISK_RET_SUCCESS);
148 extended_access(struct bregs *regs, u8 device, u16 command)
150 struct disk_op_s dop;
151 // Get lba and check.
152 dop.lba = GET_INT13EXT(regs, lba);
153 dop.command = command;
154 dop.driveid = device;
155 u8 type = GET_GLOBAL(ATA.devices[device].type);
156 if (type == ATA_TYPE_ATA) {
157 if (dop.lba >= GET_GLOBAL(ATA.devices[device].sectors)) {
158 dprintf(1, "int13_harddisk: function %02x. LBA out of range\n"
160 disk_ret(regs, DISK_RET_EPARAM);
164 dop.command = CMD_CDROM_READ;
169 disk_ret(regs, DISK_RET_SUCCESS);
173 u16 segment = GET_INT13EXT(regs, segment);
174 u16 offset = GET_INT13EXT(regs, offset);
175 dop.far_buffer = MAKE_FARPTR(segment, offset);
176 dop.count = GET_INT13EXT(regs, count);
178 int status = send_disk_op(&dop);
180 SET_INT13EXT(regs, count, GET_EBDA(sector_count));
183 dprintf(1, "int13_harddisk: function %02x, error %d!\n"
185 disk_ret(regs, DISK_RET_EBADTRACK);
188 disk_ret(regs, DISK_RET_SUCCESS);
192 /****************************************************************
193 * Hard Drive functions
194 ****************************************************************/
196 // disk controller reset
198 disk_1300(struct bregs *regs, u8 device)
205 disk_1301(struct bregs *regs, u8 device)
207 u8 v = GET_BDA(disk_last_status);
210 // XXX - clear disk_last_status?
215 disk_1302(struct bregs *regs, u8 device)
217 basic_access(regs, device, ATA_CMD_READ_SECTORS);
220 // write disk sectors
222 disk_1303(struct bregs *regs, u8 device)
224 basic_access(regs, device, ATA_CMD_WRITE_SECTORS);
227 // verify disk sectors
229 disk_1304(struct bregs *regs, u8 device)
231 basic_access(regs, device, 0);
237 disk_1305(struct bregs *regs, u8 device)
242 // read disk drive parameters
244 disk_1308(struct bregs *regs, u8 device)
246 // Get logical geometry from table
247 u16 nlc = GET_GLOBAL(ATA.devices[device].lchs.cylinders);
248 u16 nlh = GET_GLOBAL(ATA.devices[device].lchs.heads);
249 u16 nlspt = GET_GLOBAL(ATA.devices[device].lchs.spt);
250 u16 count = GET_BDA(hdcount);
252 nlc = nlc - 2; /* 0 based , last sector not used */
254 regs->ch = nlc & 0xff;
255 regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f);
257 regs->dl = count; /* FIXME returns 0, 1, or n hard drives */
259 // FIXME should set ES & DI
260 disk_ret(regs, DISK_RET_SUCCESS);
263 // initialize drive parameters
265 disk_1309(struct bregs *regs, u8 device)
270 // seek to specified cylinder
272 disk_130c(struct bregs *regs, u8 device)
277 // alternate disk reset
279 disk_130d(struct bregs *regs, u8 device)
286 disk_1310(struct bregs *regs, u8 device)
288 // should look at 40:8E also???
290 // Read the status from controller
291 u8 status = inb(GET_GLOBAL(ATA.channels[device/2].iobase1) + ATA_CB_STAT);
292 if ( (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY )
293 disk_ret(regs, DISK_RET_SUCCESS);
295 disk_ret(regs, DISK_RET_ENOTREADY);
300 disk_1311(struct bregs *regs, u8 device)
305 // controller internal diagnostic
307 disk_1314(struct bregs *regs, u8 device)
312 // read disk drive size
314 disk_1315(struct bregs *regs, u8 device)
316 // Get logical geometry from table
317 u16 nlc = GET_GLOBAL(ATA.devices[device].lchs.cylinders);
318 u16 nlh = GET_GLOBAL(ATA.devices[device].lchs.heads);
319 u16 nlspt = GET_GLOBAL(ATA.devices[device].lchs.spt);
321 // Compute sector count seen by int13
322 u32 lba = (u32)(nlc - 1) * (u32)nlh * (u32)nlspt;
323 regs->cx = lba >> 16;
324 regs->dx = lba & 0xffff;
326 disk_ret(regs, DISK_RET_SUCCESS);
327 regs->ah = 3; // hard disk accessible
330 // IBM/MS installation check
332 disk_1341(struct bregs *regs, u8 device)
334 regs->bx = 0xaa55; // install check
335 regs->cx = 0x0007; // ext disk access and edd, removable supported
336 disk_ret(regs, DISK_RET_SUCCESS);
337 regs->ah = 0x30; // EDD 3.0
340 // IBM/MS extended read
342 disk_1342(struct bregs *regs, u8 device)
344 extended_access(regs, device, ATA_CMD_READ_SECTORS);
347 // IBM/MS extended write
349 disk_1343(struct bregs *regs, u8 device)
351 extended_access(regs, device, ATA_CMD_WRITE_SECTORS);
356 disk_1344(struct bregs *regs, u8 device)
358 extended_access(regs, device, 0);
361 // IBM/MS lock/unlock drive
363 disk_1345(struct bregs *regs, u8 device)
365 // Always success for HD
366 disk_ret(regs, DISK_RET_SUCCESS);
369 // IBM/MS eject media
371 disk_1346(struct bregs *regs, u8 device)
373 // Volume Not Removable
374 disk_ret(regs, DISK_RET_ENOTREMOVABLE);
377 // IBM/MS extended seek
379 disk_1347(struct bregs *regs, u8 device)
381 extended_access(regs, device, 0);
384 // IBM/MS get drive parameters
386 disk_1348(struct bregs *regs, u8 device)
388 u16 size = GET_INT13DPT(regs, size);
390 // Buffer is too small
392 disk_ret(regs, DISK_RET_EPARAM);
398 u8 type = GET_GLOBAL(ATA.devices[device].type);
399 u16 npc = GET_GLOBAL(ATA.devices[device].pchs.cylinders);
400 u16 nph = GET_GLOBAL(ATA.devices[device].pchs.heads);
401 u16 npspt = GET_GLOBAL(ATA.devices[device].pchs.spt);
402 u64 lba = GET_GLOBAL(ATA.devices[device].sectors);
403 u16 blksize = GET_GLOBAL(ATA.devices[device].blksize);
405 dprintf(DEBUG_HDL_13, "disk_1348 size=%d t=%d chs=%d,%d,%d lba=%d bs=%d\n"
406 , size, type, npc, nph, npspt, (u32)lba, blksize);
408 SET_INT13DPT(regs, size, 26);
409 if (type == ATA_TYPE_ATA) {
410 if (lba > (u64)npspt*nph*0x3fff) {
411 SET_INT13DPT(regs, infos, 0x00); // geometry is invalid
412 SET_INT13DPT(regs, cylinders, 0x3fff);
414 SET_INT13DPT(regs, infos, 0x02); // geometry is valid
415 SET_INT13DPT(regs, cylinders, (u32)npc);
417 SET_INT13DPT(regs, heads, (u32)nph);
418 SET_INT13DPT(regs, spt, (u32)npspt);
419 SET_INT13DPT(regs, sector_count, lba);
422 // 0x74 = removable, media change, lockable, max values
423 SET_INT13DPT(regs, infos, 0x74);
424 SET_INT13DPT(regs, cylinders, 0xffffffff);
425 SET_INT13DPT(regs, heads, 0xffffffff);
426 SET_INT13DPT(regs, spt, 0xffffffff);
427 SET_INT13DPT(regs, sector_count, (u64)-1);
429 SET_INT13DPT(regs, blksize, blksize);
432 disk_ret(regs, DISK_RET_SUCCESS);
438 u16 ebda_seg = get_ebda_seg();
439 SET_INT13DPT(regs, size, 30);
441 SET_INT13DPT(regs, dpte_segment, ebda_seg);
442 SET_INT13DPT(regs, dpte_offset
443 , offsetof(struct extended_bios_data_area_s, dpte));
446 u8 channel = device / 2;
447 u8 slave = device % 2;
448 u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
449 u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
450 u8 irq = GET_GLOBAL(ATA.channels[channel].irq);
451 u8 mode = GET_GLOBAL(ATA.devices[device].mode);
454 if (type == ATA_TYPE_ATA) {
455 u8 translation = GET_GLOBAL(ATA.devices[device].translation);
456 if (translation != ATA_TRANSLATION_NONE) {
457 options |= 1<<3; // CHS translation
458 if (translation == ATA_TRANSLATION_LBA)
460 if (translation == ATA_TRANSLATION_RECHS)
465 options |= 1<<5; // removable device
466 options |= 1<<6; // atapi device
468 options |= 1<<4; // lba translation
469 if (mode == ATA_MODE_PIO32)
472 SET_EBDA2(ebda_seg, dpte.iobase1, iobase1);
473 SET_EBDA2(ebda_seg, dpte.iobase2, iobase2 + ATA_CB_DC);
474 SET_EBDA2(ebda_seg, dpte.prefix, ((slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0)
476 SET_EBDA2(ebda_seg, dpte.unused, 0xcb);
477 SET_EBDA2(ebda_seg, dpte.irq, irq);
478 SET_EBDA2(ebda_seg, dpte.blkcount, 1);
479 SET_EBDA2(ebda_seg, dpte.dma, 0);
480 SET_EBDA2(ebda_seg, dpte.pio, 0);
481 SET_EBDA2(ebda_seg, dpte.options, options);
482 SET_EBDA2(ebda_seg, dpte.reserved, 0);
483 SET_EBDA2(ebda_seg, dpte.revision, 0x11);
485 u8 *p = MAKE_FARPTR(ebda_seg
486 , offsetof(struct extended_bios_data_area_s, dpte));
487 SET_EBDA2(ebda_seg, dpte.checksum, -checksum(p, 15));
490 disk_ret(regs, DISK_RET_SUCCESS);
495 SET_INT13DPT(regs, key, 0xbedd);
496 SET_INT13DPT(regs, dpi_length, 36);
497 SET_INT13DPT(regs, reserved1, 0);
498 SET_INT13DPT(regs, reserved2, 0);
500 SET_INT13DPT(regs, host_bus[0], 'P');
501 SET_INT13DPT(regs, host_bus[1], 'C');
502 SET_INT13DPT(regs, host_bus[2], 'I');
503 SET_INT13DPT(regs, host_bus[3], 0);
505 u32 bdf = GET_GLOBAL(ATA.channels[channel].pci_bdf);
506 u32 path = (pci_bdf_to_bus(bdf) | (pci_bdf_to_dev(bdf) << 8)
507 | (pci_bdf_to_fn(bdf) << 16));
508 SET_INT13DPT(regs, iface_path, path);
510 SET_INT13DPT(regs, iface_type[0], 'A');
511 SET_INT13DPT(regs, iface_type[1], 'T');
512 SET_INT13DPT(regs, iface_type[2], 'A');
513 SET_INT13DPT(regs, iface_type[3], 0);
514 SET_INT13DPT(regs, iface_type[4], 0);
515 SET_INT13DPT(regs, iface_type[5], 0);
516 SET_INT13DPT(regs, iface_type[6], 0);
517 SET_INT13DPT(regs, iface_type[7], 0);
519 SET_INT13DPT(regs, device_path, slave);
521 SET_INT13DPT(regs, checksum, -checksum(MAKE_FARPTR(regs->ds, 30), 35));
523 disk_ret(regs, DISK_RET_SUCCESS);
526 // IBM/MS extended media change
528 disk_1349(struct bregs *regs, u8 device)
530 // Always success for HD
531 disk_ret(regs, DISK_RET_SUCCESS);
535 disk_134e01(struct bregs *regs, u8 device)
537 disk_ret(regs, DISK_RET_SUCCESS);
541 disk_134e03(struct bregs *regs, u8 device)
543 disk_ret(regs, DISK_RET_SUCCESS);
547 disk_134e04(struct bregs *regs, u8 device)
549 disk_ret(regs, DISK_RET_SUCCESS);
553 disk_134e06(struct bregs *regs, u8 device)
555 disk_ret(regs, DISK_RET_SUCCESS);
559 disk_134eXX(struct bregs *regs, u8 device)
561 disk_ret(regs, DISK_RET_EPARAM);
564 // IBM/MS set hardware configuration
566 disk_134e(struct bregs *regs, u8 device)
569 case 0x01: disk_134e01(regs, device); break;
570 case 0x03: disk_134e03(regs, device); break;
571 case 0x04: disk_134e04(regs, device); break;
572 case 0x06: disk_134e06(regs, device); break;
573 default: disk_134eXX(regs, device); break;
578 disk_13XX(struct bregs *regs, u8 device)
580 disk_ret(regs, DISK_RET_EPARAM);
584 disk_13(struct bregs *regs, u8 device)
588 // clear completion flag
589 SET_BDA(disk_interrupt_flag, 0);
592 case 0x00: disk_1300(regs, device); break;
593 case 0x01: disk_1301(regs, device); break;
594 case 0x02: disk_1302(regs, device); break;
595 case 0x03: disk_1303(regs, device); break;
596 case 0x04: disk_1304(regs, device); break;
597 case 0x05: disk_1305(regs, device); break;
598 case 0x08: disk_1308(regs, device); break;
599 case 0x09: disk_1309(regs, device); break;
600 case 0x0c: disk_130c(regs, device); break;
601 case 0x0d: disk_130d(regs, device); break;
602 case 0x10: disk_1310(regs, device); break;
603 case 0x11: disk_1311(regs, device); break;
604 case 0x14: disk_1314(regs, device); break;
605 case 0x15: disk_1315(regs, device); break;
606 case 0x41: disk_1341(regs, device); break;
607 case 0x42: disk_1342(regs, device); break;
608 case 0x43: disk_1343(regs, device); break;
609 case 0x44: disk_1344(regs, device); break;
610 case 0x45: disk_1345(regs, device); break;
611 case 0x46: disk_1346(regs, device); break;
612 case 0x47: disk_1347(regs, device); break;
613 case 0x48: disk_1348(regs, device); break;
614 case 0x49: disk_1349(regs, device); break;
615 case 0x4e: disk_134e(regs, device); break;
616 default: disk_13XX(regs, device); break;
621 /****************************************************************
623 ****************************************************************/
626 get_device(struct bregs *regs, u8 iscd, u8 drive)
628 // basic check : device has to be defined
629 if (drive >= CONFIG_MAX_ATA_DEVICES) {
630 disk_ret(regs, DISK_RET_EPARAM);
631 return CONFIG_MAX_ATA_DEVICES;
634 // Get the ata channel
635 u8 device = GET_GLOBAL(ATA.idmap[iscd][drive]);
637 // basic check : device has to be valid
638 if (device >= CONFIG_MAX_ATA_DEVICES) {
639 disk_ret(regs, DISK_RET_EPARAM);
640 return CONFIG_MAX_ATA_DEVICES;
647 handle_legacy_disk(struct bregs *regs, u8 drive)
650 floppy_13(regs, drive);
655 // XXX - old code had other disk access method.
656 disk_ret(regs, DISK_RET_EPARAM);
661 u8 device = get_device(regs, 1, drive - 0xe0);
662 if (device >= CONFIG_MAX_ATA_DEVICES)
664 cdrom_13(regs, device);
668 u8 device = get_device(regs, 0, drive - 0x80);
669 if (device >= CONFIG_MAX_ATA_DEVICES)
671 disk_13(regs, device);
675 handle_40(struct bregs *regs)
677 debug_enter(regs, DEBUG_HDL_40);
678 handle_legacy_disk(regs, regs->dl);
681 // INT 13h Fixed Disk Services Entry Point
683 handle_13(struct bregs *regs)
685 debug_enter(regs, DEBUG_HDL_13);
688 if (CONFIG_CDROM_EMU) {
689 if (regs->ah == 0x4b) {
693 u16 ebda_seg = get_ebda_seg();
694 if (GET_EBDA2(ebda_seg, cdemu.active)) {
695 if (drive == GET_EBDA2(ebda_seg, cdemu.emulated_drive)) {
703 handle_legacy_disk(regs, drive);
706 // record completion in BIOS task complete flag
710 debug_isr(DEBUG_ISR_76);
711 SET_BDA(disk_interrupt_flag, 0xff);